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Low LossLight WeightStrip Braid

Harbour IndustriesCoaxial Cable Catalog

Low LossLight WeightStrip Braid

MIL-C-17Spiral StripHigh Strength

COAXIAL CABLES

LL (Low Loss) Cables ............................................. page 4 - 7 Expanded PTFE tape dielectrics and a composite braided shields

SB (Strip Braid) Cables ............................................ page 8 - 9 Solid PTFE dielectrics and a composite braided shields

SS (Spiral Strip) Cables ........................................... page 10 - 11 Solid PTFE dielectrics and a spiral strip shields

MIL-C-17 Cables ..................................................... page 12 - 13QPL approved constructions

CN (Communication Network) Cables ................... page 14 - 15 Special cost effective designs with PVC jackets and single or double braids

Phase Stability Over Temperature............................ page 18

VSWR and Return Loss .......................................... page 20

Power Handling Chart............................................. page 17

Phase Stability Over Flexure ................................... page 19

HS (High Strength) & TRX (Triaxial) Cables ........ page 16

Power vs Temperature Derating Factors.................. page 21

Attenuation vs Temperature Correction Factor........ page 22

Shielding Effectiveness Test Method....................... page 23-29

U.S. Toll Free (800)659-4733 Phone (802)985-3311Canada Phone (450)293-5304www.harbourind.come-mail: [email protected]

Harbour Industries Facility in Shelburne, Vermont.

Harbour Industries is the preeminent manufacturer of high temperature and high performance coaxial cables for the military, aerospace, commercial, and industrial markets. Design and process engineering expertise ensure high quality and uniform products in accordance with customer specifications. Harbour Industries has a wide range of manufacturing processes with large scale production operations and “First-in-Class” customer service.

Harbour manufactures QPL approved MIL-C-17 Coax cables swept for VSWR to ensure product uniformity. For many years, Harbour has also been manufacturing special versions of MIL-C-17 cables such as HS High Strength and TRX Triaxial constructions to meet demanding customer requirements.

In the 1980’s and 1990’s, Harbour developed a series of LL Low Loss, SB Strip Braid, and SS Spiral Strip series of coaxial cables for the RF and Microwave markets. Techniques such as composite strip braid configurations and proprietary expanded PTFE tape dielectrics were developed, thereby creating a cost effective viable source of supply for assembly houses and OEMs.

Moving into the 21st century, through the use of special materials and innovative construction techniques, Harbour continues to enhance their product offering with coaxial cables that are lighter weight, more flexible, and have higher levels of shielding effectiveness. Explore Harbour’s catalog for just a few of the cables offered.

Harbour is an ISO 9001-2000 manufacturer with facilities that are fully compliant to the directives of RoHS, DFARS, WEEE, ELV and BFR.

Construction: Center Conductor: Solid silver plated copper Dielectric: Expanded PTFE tape Inner Braid: Flat silver plated copper strip Inter layer: Aluminum polyester or polyimide tape Outer Braid: Round silver plated copper Jacket: FEP, translucent colors, solid colors or clear

LL120 LL160 LL142 LL235 LL335

.0285˝ .0403" .051˝ .057˝ .089˝.080˝ .110" .145˝ .160˝ .250˝.086˝ .116" .152˝ .170˝ .258˝.092˝ .122" .158˝ .175˝ .264˝.108˝ .140" .174˝ .191˝ .284˝.120˝ .160" .195˝ .235˝ .335˝

17 21 44 48 1000.6˝ 0.8" 1.0˝ 1.2˝ 1.7˝

Typ / Max Typ / Max Typ / Max Typ / Max Typ / Max9.0 / 12.0 6.4 / 7.1 5.2 / 6.5 4.6 / 5.0 2.4 / 3.514.6 / 18.0 10.2 / 11.2 8.2 / 10.0 7.4 / 8.0 4.8 / 5.521.0 / 25.0 14.6 / 16.0 11.3 / 14.0 10.6 / 11.4 6.8 / 7.825.6 / 30.0 17.8 / 19.6 14.0 / 17.0 13.1 / 14.0 8.4 / 9.532.0 / 38.0 23.3 / 25.7 18.0 / 21.0 17.2 / 18.0 10.3 / 12.548.0 / 54.0 33.5 / 36.9 25.0 / 30.0 25.0 / 27.0 17.0 / 19.061.5 / 74.0 45.8 / 50.4 36.0 / 40.0 34.1 / 37.0 22.0 / 26.0

64.0 42.0 32.9 23.0 18.0

Harbour Industries • 4744 Shelburne Road • Shelburne • Vermont • 05482 • USA • 802-985-3311

LL (Low Loss) Coaxial Cable-solid center conductors

Dielectric diameterDiameter over inner braidDiameter over interlayerDiameter over outer braid

Center conductor diameter

Weight(lbs/mft)

Overall diameter

Bend radius

Attenuation (dB/100ft)400 MHz

18 GHz10 GHz5 GHz3 GHz

2 GHz1 GHz

Cut-off frequency (Ghz)

Operating temperature -55 +200° C Velocity of Propagation 80% Impedence 50 Ohms Capacitance 25.0 pF/ft Shielding Effectiveness <-95 dB

Additional constructions available - check with the factory for detailsAll figures referenced are nominal

4

Unique cable designThe braid configuration and the expanded PTFE dielectrics of the LL cable constructions contribute to lower attenuation levels at higher frequencies, while providing shielding effectiveness levels that exceed those of flexible MIL-C-17 cables. Flat strips of silver plated copper are braided over the dielectric core with an intermediate metallized polyester or polyimide layer, and an outer round wire braid.

Improved electrical characteristicsHarbour’s LL cables with expanded PTFE dielectrics exhibit low coefficients of expansion over the entire operating temperature range from -55° C to +200° C. Impedance discontinuities are minimized at the cable-to-connector interface. Higher levels of power can be transmitted because higher temperatures do not affect the cable due to the thermal stability of the tape. Where phase versus temperature requirements are critical, Harbour’s LL cables allow for an approximately 75% lower phase shift and change in propagation time delay due to temperature. Temperature cycling tests have been performed on a number of Harbour’s cables with positive results.

Lowest attenuation for any given size Harbour’s LL coaxial cables, with expanded PTFE dielectrics and strip braid composite configurations, offer attenuation from 20 to 35% below other mil spec cables of comparable size. When size and weight are considerations, Harbour’s LL cables should be considered. The graph below defines maximum attenuation levels for all LL cables referenced.

Typical Loss Characteristics

Frequency in GHz

Atte

nuat

ion

(dB/

100

ft)

100

10

10.1 1 10 100

�

LL450

�LL142�LL235�LL393-2��

LL120��

LL335

LL120

LL142LL235LL393-2LL335

LL450

Frequency in GHz


LL (Low Loss) Coaxial Cable

5

LL (Low Loss Light Weight) Coaxial Cable

Construction: Center Conductor: Stranded silver plated copper Dielectric: Expanded PTFE tape Inner Braid: Flat silver plated copper strip Inter layer: Aluminum polyester or polyimide tape Outer Braid: Round silver plated copper Jacket: FEP, translucent colors, solid colors or clear

LL142STR LL270STR LL450STR LL475STR

.051˝ (7/.017") .068" (7/.023") .133˝ (7/.048") .155" (7/.0553").138˝ .185˝ .360˝ .405".146˝ .195˝ .368˝ .418".151˝ .200˝ .374˝.167˝ .220˝ .394˝ .435".195˝ .270˝ .450˝ .475"

44 70 165 1801.0˝ 1.4˝ 2.2˝ 2.4"

Typ / Max Typ / Max Typ / Max Typ / Max5.7 / 7.0 4.3 / 4.5 2.1 / 2.3 1.9 / 2.28.9 / 11.1 6.7 / 7.3 3.5 / 3.7 3.1 / 3.4

12.4 / 15.6 9.6 / 10.6 5.1 / 5.6 4.7 / 5.114.9 / 19.0 12.0 / 13.4 6.3 / 7.1 5.8 / 6.420.1 / 24.0 15.8 / 18.0 8.4 / 10.0 7.5 / 8.028.8 / 35.0 22.5 / 26.0 12.4 / 13.3 11.4 / 12.539.4 / 43.0 31.1 / 36.0 - / - - / -

32.0 24.0 12.8 11.0


LL (Low Loss) Coaxial Cable-stranded center conductors

Dielectric diameterDiameter over inner braidDiameter over interlayerDiameter over outer braid


Weight(lbs/mft)

Overall diameter

Bend radius


18 GHz10 GHz5 GHz3 GHz

2 GHz1 GHz




6

Construction: Center Conductor: Solid silver plated copper Dielectric: Expanded PTFE tape Inner Braid: Flat silver plated copper strip Inter layer: Aluminum polyester or polyimide tape (optional) Outer Braid: Round silver plated copper Jacket: FEP, translucent colors, solid colors or clear

LL142LW LL235LW LL335LW

.051˝ .057˝ .089˝

.140˝ .155˝ .245˝

.145˝ .160˝ .250˝

.162˝ .177˝ .271˝

.182˝ .197˝ .291˝37 41 74

.09˝ 1.0˝ 1.4˝

Typ / Max Typ / Max Typ / Max5.2 / 6.5 4.6 / 5.0 2.4 / 3.58.2 / 10.0 7.4 / 8.0 4.8 / 5.511.3 / 14.0 10.6 / 11.4 6.8 / 7.814.0 / 17.0 13.1 / 14.0 8.4 / 9.518.0 / 21.0 17.2 / 18.0 10.3 / 12.525.0 / 30.0 25.0 / 27.0 17.0 / 19.036.0 / 40.0 34.1 / 37.0 22.0 / 26.0

32.9 23.0 18.0


LL (Low Loss Light Weight) Coaxial Cable

Dielectric diameterDiameter over inner braidDiameter over outer braid


Weight(lbs/mft)Overall diameter

Bend radius


18 GHz10 GHz

5 GHz3 GHz

2 GHz

1 GHz




7

Construction: Center Conductor: silver plated copper or silver plated copper clad steel Dielectric: solid PTFE Inner braid: flat silver plated copper strip Interlayer: aluminum polimide polyester tape Outer braid: round silver plated copper Jacket: FEP, translucent colors, solid colors or clear

SB316 SB142 SB400 SB304 SB393

SCCS SCCS SPC SCCS SPC.020˝

(7/.0067˝).037˝Solid

.0385˝(19/.008˝)

.059˝Solid

.094˝(7/.031˝)

.060˝ .1175˝ .116˝ .185˝ .285˝

.067˝ .128˝ .126˝ .195˝ .295˝

.072˝ .133˝ .132˝ .201˝ .301˝

.088˝ .152˝ .152˝ .221˝ .325˝

.098˝ .195˝ .195˝ .280˝ .390˝12 40 47 77 155

.05˝ 1.0˝ 1.0˝ 1.4˝ 2.0˝

Typ/Max Typ/Max Typ/Max Typ/Max Typ/Max16.1 / 18.0 7.1 / 8.0 7.8 / 8.5 5.6 / 5.8 3.4 / 3.825.8 / 29.0 11.2 / 13.0 12.7 / 13.8 9.5 / 9.8 5.9 / 6.535.0 / 40.0 16.5 / 18.0 18.0 / 20.0 13.5 / 15.0 9.0 / 10.046.0 / 51.0 21.0 / 23.3 23.5 / 24.9 17.3 / 18.9 11.7 / 13.061.4 / 68.0 27.0 / 30.0 31.2 / 33.0 23.0 / 26.2 16.5 / 18.089.0 / 100.0 41.0 / 45.0 45.0 / 50.0 34.5 / 41.5 27.0 / 30.0126.0 / 150.0 58.0 / 64.0 64.0 / 70.0 49.0 / 58.3 - / -

57.0 34.2 29.0 21.6 13.9


SB (Strip Braid) Coaxial Cable

Operating temperature: -55 +200° C Velocity of Propagation: 70% Impedence: 50 Ohms Capacitance: 29.4 pF/ft Shielding Effectiveness: <-95 dB

Diameter over inner braidDielectric diameterCenter conductor diameter

Center conductor

Diameter over interlayerDiameter over outer braidOverall diameterWeight (lbs/mft)Bend radius

Attenuation (dB/100 ft)


1 GHz

5 GHz

400 MHz

10 GHz18 GHz

3 GHz2 GHz


8

Harbour’s SB coaxial cables have been designed for low attenuation at high frequencies, while using similar dimensions to MIL-C-17 constructions. Standard connectors may frequently be used, thereby avoiding tooling charges.

Solid PTFE dielectrics are manufactured with tight tolerances to ensure impedance uniformity and to effect VSWR levels that meet or exceed MIL-C-17 specifications for cables of comparable size. The strip braid configuration is by far the most effective means of lowering attenuation levels of coaxial cable at high frequencies while providing shielding effectiveness levels that exceed those of flexible MIL-C-17 cables. Flat strips of silver plated copper are braided over the dielectric core, frequently with an intermediate metallized mylar or kapton layer, and an outer round wire braid. This shielding technique provides superior shielding effectiveness and lower transfer impedance than any standard double braided mil-spec construction.

FEP jackets are typically used, but alternate designs are available such as flame retardant PVC and abrasion resistant overall braids. Marker tapes or surface printing are used for positive identification.

The chart on the following page outlines just a few designs Harbour manufactures. Some of the more popular constructions are standard stock items, and many additional cables are available for prototype assemblies. Many cables not referenced have been designed to meet specific customer requirements. The graph below defines maximum attenuation levels for all SB cables referenced.


Frequency in GHz

Atte

nuat

ion

(dB/

100

ft)

1000

100

10

10.1 1 10 100

�SB316��SB400�SB142�SB304

�

SB393

SB316

SB400SB142SB304

SB393


SB (Strip Braid) Coaxial Cable

9

Construction: Center conductor: Solid Silver plated copper clad steel (SCCS) Dielectric: Solid PTFE Inner shield: Spiral strip of silver plated copper Outer braid: Round silver plated copper Jacket: Solid blue FEP

SS402 SS405 SS75086.037˝ .0201˝ .0113˝.117˝ .064˝ .064˝.128˝ .071˝ .074˝.141˝ .086˝ .086˝.163˝ .104˝ .100˝

32 14 140.8˝ 0.5˝ 0.5˝50 50 75

29.4 29.4 19.5Typ/Max Typ/Max Typ/Max7.1 / 8.0 13.5 / 14.0 13.5 / 14.0

11.2 / 13.0 21.7 / 23.0 22.0 / 24.016.5 / 18.5 29.0 / 32.0 31.0 / 34.018.0 / 20.0 33.0 / 35.0 34.0 / 37.021.0 / 23.0 37.0 / 39.0 38.0 / 41.027.0 / 30.0 47.0 / 52.0 50.0 / 55.541.0 / 45.0 69.0 / 80.0 71.0 / 84.058.0 / 64.0 95.0 / 110.0 98.0 / 115.0

34.0 63.0 72.0


SS (Spiral Strip) Coaxial Cable

Operating temperature: -55 +200° C Velocity of Propagation: 70% Shielding Effectiveness: <-110 dB

Center conductor diameterDielectric diameterDiameter over inner shieldDiameter over outer braidOverall diameter

Weight(lbs/mft)Bend radius Impedance (Ohms)Capacitance (pF/ft)Attenuation (dB/100ft) @

Cut-off frequency (GHz)

400 MHz

2 Ghz1 GHz


2.4 Ghz3 Ghz5 Ghz10 Ghz18 Ghz

10

Harbour’s SS coaxial cables are flexible alternatives to semi-rigid coax, and the unique shielding configuration offers a cost effective, low attenuation option. The use of strip/round braid composite shields results in low transfer impedance levels. The 50 ohm constructions exhibit the same attenuation characteristics as the M17/130-RG402 and M17/133-RG405 cables. All SS cables have VSWR characteristics that meet or exceed similar size flexible constructions. SS402 and SS405 have been designed with diameters over the outer braids of .141” and 086” respectively, so standard SMA connectors may be used.

An overall FEP jacket is resistant to oil and chemicals. The cable is either unmarked or surface printed eliminating a marker tape that may cause problems in termination. Without the marker tape, an improved level of adhesion exists between the braided core and the jacket that allows ease of termination with short length assemblies.


SS (Spiral Strip) Coaxial Cable


SS75086SS405

SS402

Frequency in GHz

Atte

nuat

ion

(dB

/100

ft)

100

10

10.1 1 10010

11

MIL-C-17 Coaxial Cables - including M17/176-00001 Twinaxial Data Bus Cable

Harbour Industries is a QPL approved manufacturer of high temperature, high performance coaxial cables supplied in exact accordance with the MIL-C-17 specification. The information referenced has been taken from the MIL-C-17 “slant sheets” which define complete physical and electrical characteristics for each MIL-C-17 part number including dimensional parameters, dielectric materials, shield constructions, VSWR, and maximum attenuation over various frequency ranges. For complete individual slant sheets, see the Defense Supply Center Columbus (DSCC) link in the Industry Links section of Harbour’s website.

The Importance of VSWR Sweep TestingWhen selecting a 50 ohm coaxial cable, constructions with VSWR requirements are highly recommended. Manufacturing and sweep testing cables with concern for VSWR ensures a quality cable free of spikes over the frequency range referenced on the slant sheet.

Precision PTFE Dielectrics UsedAll of the PTFE dielectric coax cables listed are high temperature, high performance constructions exhibiting high dielectric strength and low capacitance in proportion to the cable’s dielectric constant. Harbour manufactures all PTFE dielectric cable constructions with tolerances tighter than the MIL-C-17 specification to ensure uniformity of electrical characteristics, especially impedance, attenuation, and VSWR.

Constructions with PTFE Tape Wrapped JacketsHarbour manufactures PTFE tape wrapped cables - specifically RG187 A/U, RG188 A/U, RG195 A/U, and RG196 A/U - in accordance with a previous revision of the MIL-C-17 specification. These constructions can withstand operating temperatures up to 250 º versus 200º C for FEP jacketed cables. PTFE tape wrapped cables are generally more flexible than their FEP jacketed counterpart. Alternative 250º constructions are also available with PFA jackets.

M17 PartCenter

ConductorDielectricDiameter Shield

ShieldDiameter Jacket

OverallDiameter

BendRadius

Weight(lbs/mft)

Comments

M17/60-RG142 .037” SCCS .116” SPC (2) .160" FEP .195” 1.0” 43.0M17/93-RG178 .0120” (7/.004”)SCCS .033” SPC .051" FEP .071” 0.4” 6.3M17/94-RG179 .0120” (7/.004”)SCCS .063” SPC .080" FEP .100” 0.4” 10.8M17/95-RG180 .0120” (7/.004”)SCCS .102” SPC .118" FEP .141” 0.7” 19.8M17/111-RG303 .037” SCCS .116” SPC .136" FEP .170” 0.9” 31.0M17/112-RG304 .059” SCCS .185” SPC (2) .240" FEP .280” 1.4” 94.0M17/113-RG316 .0201” (7/.0067”)SCCS .060” SPC .075" FEP .098” 0.5” 12.2M17/127-RG393 .094” (7/.0312”) SPC .285” SPC (2) .314" FEP .390” 2.0” 165.0M17/128-RG400 .0384” (19/.008”) SPC .116” SPC (2) .156" FEP .195” 1.0” 50.0M17/131-RG403 .0120” (7/.004”)SCCS .033” SPC (2) .090" FEP (2) .116” 0.6” 15.0 Triaxial RG-178M17/152-00001 .0201” (7/.0067”)SCCS .060” SPC (2) .091" FEP .114” 0.6” 18.5 Double Shield RG-316M17/158-00001** .037” SCCS .116” SPC (2) .160" FEP .195” 1.0” 56.0 Use M17/60-RG142M17/169-00001** .0120” (7/.004”)SCCS .033” SPC .051" FEP .071” 0.4” 6.3 Use M17/93-RG178M17/170-00001** .037” SCCS .116” SPC .136" FEP .170” 0.9” 39.0 Use M17/111-RG303M17/172-00001** .0120” (7/.004”)SCCS .060” SPC .075" FEP .098” 0.5” 11.5 Use M17/113-RG316M17/175-00001** .0384”(19/.008”)SPC .116” SPC (2) .156" FEP .195” 1.0” 50.0 Use M17/128-RG400M17/176-00002 .0235” (19/.005”)SPA(2) .042” SPA .100" PFA .129” 0.6” 18.0 Twinax

RG187 A/U .0120” (7/.004”)SCCS .063” SPC .079" PTFE .100” 0.5” 10.0 Tape Wrapped JacketRG188 A/U .0201” (7/.0067”)SCCS .060” SPC .080" PTFE .100” 0.5” 11.0 Tape Wrapped JacketRG195 A/U .0129” (7/.004”)SCCS .102” SPC .117" PTFE .141” 0.7” 18.0 Tape Wrapped JacketRG196 A/U .0120” (7/.004”)SCCS .034” SPC .050" PTFE .067” 0.4” 6.0 Tape Wrapped Jacket


** DSCC has removed these part numbers from MIL-DTL-17.

12


Attenuation (dB/100 ft)

M17 PartImpedance

(ohms)Capacitance

(pF/ft)Max

Voltage100 MHzTyp/Max

400 MHzTyp/Max

1 GHzTyp/Max

2.4 GHzTyp/Max

5 GHzTyp/Max

10 GHzTyp/Max

MaxFrequency

(GHz)M17/60-RG142 50 +/-2 29.4 1900 4.0 / 5.5 8.1 / 11.7 13.4 / 19.2 21.3 / 30.4 33.3 / 48.7 12.4M17/93-RG178 50 +/-2 29.4 1000 13.0 / 16.0 27.2 / 33.0 44.2 / 52.0 61.9 / 83.3M17/94-RG179 75 +/-3 19.4 1200 8.0 / 9.2 15.5 / 21.0 26.7 / 30.7M17/95-RG180 95 +/-5 17.4 1500 5.7 / 6.6 11.7 / 17.4 19.2 / 23.0M17/111-RG303 50 +/-2 29.4 1900 3.5 / 3.9 7.2 / 8.0 13.5 / 15.0M17/112-RG304 50 +/-2 29.4 3000 2.4 / 2.7 5.8 / 6.4 10.0 / 11.1 8.0M17/113-RG316 50 +/-2 29.4 1200 7.6 / 11.0 16.0 / 21.0 26.2 / 38.0 41.2 / 55.4 3.0M17/127-RG393 50 +/-2 29.4 1500 2.3 / 2.5 4.4 / 5.0 7.7 / 9.2 12.4 / 14.2 21.3 / 26.8 30.1 / 37.9 11.0M17/128-RG400 50 +/-2 29.4 1900 4.3 / 4.5 8.6 / 10.5 14.1 / 18.1 22.6 / 30.2 35.6 / 52.1 61.6 / 78.0 12.4M17/131-RG403 50 +/-2 29.4 1000 33.3 / 37.0 10.0M17/152-00001 50 +/-2 29.4 1200 8.1 / 11.5 17.8 / 24.0 29.6 / 40.0 43.1 / 58.3 100.0 / 110.0 153.0 / 170.0 12.4M17/158-00001** 50 +/-2 29.4 1900 8.1 / 9.5M17/169-00001** 50 +/-2 29.4 1000 27.2 / 29.0M17/170-00001** 50 +/-2 29.4 1900 7.7 / 8.6M17/172-00001** 50 +/-2 29.4 1200 15.5 / 21.0M17/175-00001** 50 +/-2 29.4 1900 8.6 / 10.5M17/176-00002 77 +/-7 19.0 1000

RG187 A/U 75 +/-3 19.4 1200 15.5 / 21.0RG188 A/U 50 +/-2 29.4 1200 7.6 / 11.0 16.0 / 21.0 26.2 / 38.0 41.2 / 55.4 3.0RG195 A/U 95 +/-5 17.4 1500 11.7 / 17.4RG196 A/U 50 +/-2 29.4 1000 13.0 / 16.0 27.2 / 33.0 44.2 / 52.0 41.7 / 56.1 3.0

“Maximum frequencies” are those as referenced on individual slant sheets of the MIL-C-17 specification. No values are given above 400MHz for unswept constructions because MIL-C-17 specification recommends these cables should not be used above this frequency.

MIL-C-17 Coaxial Cables - including M17/176-00001 Twinaxial Data Bus Cable

** DSCC has removed these part numbers from MIL-DTL-17.UL Approvals for many of the MIL-C-17 cables listed are available upon request.

Triaxial

Single BraidDouble Braid

Twinax

13

CN (Communication Network) Coaxial Cable - Single Braid

CN178TC CN178SC CN316TC CN316SC CN179TC CN179SC

.0120˝(7/.0040”)

.0120˝(7/.0040”)

.0201(7/.0067”)

.0201˝(7/.0067”)

.0120˝(7/.0040”)

.0120˝(7/.0040”)

.033˝ .033˝ .060˝ .060˝ .063˝ .063˝

.051˝ .051˝ .076˝ .076˝ .079˝ .079˝

.072˝ .072˝ .098˝ .098˝ .100˝ .100˝6 6 12 12 10 10

.04˝ 0.4˝ 0.5˝ 0.5˝ 0.5˝ 0.5˝50 50 50 50 75 75

29.4 29.4 29.4 29.4 19.5 19.5

Typ / Max Typ / Max Typ / Max Typ / Max Typ / Max Typ / Max13.2 / 16.2 13.0 / 16.0 7.7 / 11.1 7.6 / 11.0 8.1 / 9.3 8.0 / 9.227.5 / 33.4 27.2 / 33.0 16.2 / 21.3 16.0 / 21.0 15.7 / 21.3 15.5 / 21.044.7 / 53.2 44.2 / 52.0 26.5 / 36.1 26.2 / 38.0 27.0 / 31.1 26.7 / 30.764.1 / 76.0 63.3 / 75.1 38.2 / 51.1 37.5 / 50.5 38.5 / 44.5 38.3 / 44.070.2 / 83.2 69.4 / 82.3 41.7 / 56.1 41.2 / 55.4 - -79.6 / 95.1 78.7 / 94.0 47.5 / 59.2 46.9 / 58.0 - -


Construction: Center conductor: Silver plated copper clad steel (SCCS) Dielectric: Solid PTFE Braids: Round silver or tin plated copper Jacket: FRPVC Operating temperature: -20 +150° C Velocity of Propagation: 70%


Dielectric diameterConductor diameter

Diameter over braidOverall diameterWeight(lbs/mft)Bend radius Impedance (Ohms)Capacitance (pF/ft)


400 MHz

1 GHz2 GHz

2.4 GHz3 GHz

14

CN316SCSC CN142SCSC CN400SCSC CN179SCSC

.0201˝(7/.0067”)

.0370˝solid

.0384˝(19/.008)

.0120˝(7/.0040”)

.060˝ .116˝ .116˝ .063˝

.076˝ .136˝ .136˝ .079˝

.092˝ .156˝ .156˝ .096˝

.114˝ .195˝ .195˝ .118˝18 43 50 150.6˝ 1.0˝ 1.0˝ 0.6˝50 50 50 75

29.4 29.4 29.4 19.5

Typ / Max Typ / Max Typ / Max Typ / Max7.6 / 11.0 4.0 / 5.5 4.4 / 4.5 8.0 / 9.216.0 / 21.0 8.1 / 11.7 8.9 / 10.5 15.5 / 21.026.2 / 38.0 13.4 / 19.2 14.6 / 18.1 26.7 / 30.737.5 / 50.5 19.4 / 27.7 21.4 / 27.5 38.3 / 44.041.2 / 55.4 21.3 / 30.4 23.4 / 30.2 -46.9 / 58.0 24.6 / 35.0 27.1 / 38.0 -

CN (Communication Network)Coaxial Cable - Double Braid



Construction: Center conductor: Silver plated copper clad steel (SCCS) Dielectric: Solid PTFE Braids: Round silver or tin plated copper Jacket: FRPVC Operating temperature: -20 +150° C Velocity of Propagation: 70%

Conductor diameterDielectric diameterDiameter over 1st braidDiameter over 2nd braidOverall diameterWeight(lbs/mft)Bend radius

Impedance (Ohms)Capacitance (pF/ft)


3 GHz

400 MHz

2 GHz

1 GHz

2.4 GHz

15

Construction: Center Conductor: stranded, silver plated copper clad steel (alloys optional) Dielectric: solid PTFE Braid: silver plated copper clad steel (alloys optional) Jacket: FEP

Part NumberCenter conductor

diameterDielectricdiameter

Diameter over inner braid

Overalldiameter

Impedance(ohms)

Capacitance(pF/ft)

HS 178 .0120˝ (7/.0040˝) .033˝ .049" .071˝ 50 32HS 179 .0120˝ (7/.0040˝) .063˝ .080" .100˝ 75 23HS 180 .0120˝ (7/.0040˝) .102˝ .118" .141˝ 95 17HS 316 .0201˝ (7/.0067˝) .060˝ .076" .098˝ 50 32

Construction: Center Conductor: silver plated copper or copper clad steel Dielectric: solid PTFE Inner braid: silver plated copper Interlayer: FEP Outer Braid: silver plated copper Jacket: FEP

Part NumberCenter conductor

diameterDielectricdiameter

Diameter over inner braid

Diameter overinterlayer

Diameter overouter braid

Overalldiameter

M17/131-RG403 .0120˝(7/.0040˝) .033˝ .049˝ .074˝ .090˝ .116˝TRX316 .0201˝(7/.0067˝) .060˝ .076˝ .096˝ .112˝ .140˝TRX142 .037˝ Solid .116˝ .136˝ .166˝ .186˝ .215˝TRX400 .0384˝(19/.008˝) .116˝ .136˝ .166˝ .186˝ .215˝TRX179 .0120˝(7/.0040˝) .063˝ .079˝ .099˝ .115˝ .141˝TRX180 .0120˝(7/.0040˝) .102˝ .118˝ .138˝ .154˝ .180˝


HS (High Strength) Coaxial Cable

TRX (Triaxial) Cable

Additional constructions available - check with the factory for detailsAll figures referenced are nominal16

Dielectric Diameter

Overall Diameter

@ Frequency

400MHz 1GHz 3Ghz 5GHz 10GHzM17/RG178, CN178SC, CN178TC, RG196 A/U .033" .071" 123 78 41 28 14

M17/131-RG403 .033" .116" 123 78 41 28 14

M17/113-RG316, CN316SC, CN316TC, RG188 A/U, SB316 .060" .098" 240 160 80 57 30

M17/152-00001, CN316SCSC, CN316TCTC .060" .114" 240 160 80 57 30

M17/94-RG179, CN179SC, CN179TC, RG187 A/U .063" .100" 310 200 110 76 41

SS405 .064" .104" 240 160 80 57 30

SS75086 .064" .100" 240 160 80 57 30

LL120 .080" .120" 720 460 250 190 140

M17/95-RG180, RG195 A/U .102" .141" 400 250 135 93 50

M17/60-RG142, CN142SCSC, CN142TCTC .116" .195" 1100 550 350 245 140

M17/111-RG303 .116" .170" 1100 550 350 245 140

M17/128-RG400, SB400 .116" .195" 1100 550 350 245 140

SS402 .117" .163" 1100 550 350 245 140

SB142 .117" .195" 1100 550 350 245 140

LL142 .145" .195" 1200 720 400 310 220

LL235 .160" .235" 1500 900 540 410 300

LL393-2 .185" .270" 1900 1100 680 510 380

M17/112-RG304 .185" .280" 1900 1100 680 510 380

SB304 .185" .280" 1450 870 460 330 190

LL335 .250" .335" 2900 1800 1050 850 600

M17/127-RG393, SB393 .285" .390" 2800 1700 880 620 350

LL450 .360" .450" 7250 4200 2200 1600 1015


Maximum Power Handling Capability of Coaxial Cable (In Watts)

17

Phase Stability over TemperaturePhase Change vs. Temperature.

-5000

-4000

-3000

-2000

-1000

0

1000

2000

3000

4000

5000

-40 -30 -20 -10 0 10 20 22 30 40 50 60 70 80 90 100 110 120

Temp. (C)

Pha

se C

hang

e (p

pm)

Phase Change:The electrical length for a given frequency will “shift” as a result of environmental changes. The degree of change isbased on mechanical stresses, connector torque and thermal conditions.

The degree of phase shift as a result of temperature variation can be calculated by using the following formula:

∆Φ = Φ *

Before calculating the excepted phase shift there are a few additional questions that need to be answered.

→ What is the mechanical length of the assembly (ft)→ What is the frequency of interest (Ghz)→ What is the electrical length at the frequency of interest (Φ)→ What is the dielectric constant of the insulation (E)→ What is the temperature of interest (°C)

Once these questions are answered the phase shift can be calculated.

For example, what would be the change in phase for a 10 ft cable assembly of LL142 at 80 °C at 18 Ghz.?

Step 1:Calculate the electrical length using the following formula:

Φ = 365.7 * * (ft) x (Ghz)

Φ = 365.7 * * 10 * 18 = 80,032°

Step 2:Using the chart above determine the parts per million (ppm) at 80°C.212 ppm @ 80°C

Step 3:Now solve

∆Φ = Φ *

∆Φ = 80,032° * == = 16.97°

The cable assembly will become 16.97° longer at 80°C

1.478

212

106

ppm

106

ppm

106

Ε


)Phase Change vs. Temperature.

-5000

-4000

-3000

-2000

-1000

0

1000

2000

3000

4000

5000

-40 -30 -20 -10 0 10 20 22 30 40 50 60 70 80 90 100 110 120

Temp. (C)

Phas

e C

hang

e (p

pm)

at 18 Ghz

18

Phase stability over flexure can be significantly affected by the cable assembly technique, cable bend radius, and the length of the cable assembly. Harbour’s Low Loss coax cables are typically tested for phase stability over flexure using an Agilent E8362B Network Analyzer using the following procedure:

a. Perform dynamic testing on a given length of cable (see Figure 1) b. Record phase in the network analyzer c. Flex cable over various size mandrels depending on the cable diameter d. Retest cable for phase change when the cable is coiled around the mandrel e. Record change in the network analyzer f. Display phase change on the analyzer as degrees of change over frequency.

Performance - less than:+/- 2.0º up to 4 GHz+/- 4º from 4.01 to 8 GHz+/- 6º from 8.01 to 18 GHz

2 4 6 8 102 12 14 16 18

Dynamic Bend Test (Figure 1)


This data is representative of anticipated results. As phase stability over flexure is application dependent, please contact the factory regarding your specific cable and application.

Phase Stability over Flexure

Frequency (GHz)

Phase Change (degrees)

19

SRL VSWR SRL VSWR SRL VSWR-40dB-39dB-38dB-37dB-36dB-35dB-34dB-33dB-32dB-31dB

1.0202:11.0227:11.0255:11.0287:11.0322;11.0362:11.0407:11.0458:11.0515:11.0580:1

-30dB-29dB-28dB-27dB-26dB-25dB-24dB-23dB-22dB-21dB

1.0653:11.0736:11.0829:11.0935:11.1055:11.1192:11.1347:11.1524:11.1726:11.1957:1

-20dB-19dB-18dB-17dB-16dB-15dB-14dB-13dB-12dB-11dB-10dB

1.2222:11.2528:11.2880:11.3290:11.3767:11.4326:11.4985:11.5769:11.6709:11.7849:11.9250:1

VSWR and Return Loss of Coaxial Cables

Voltage Standing Wave Ratio (VSWR) and Structural Return Loss (SRL) are basically the same - only different. Both terms are used to characterize the uniformity of a cable’s impedance along its length as it relates to reflected energy. VSWR is essentially the ratio of the input impedance to the average characteristic impedance as a result of signal losses due to reflections and is expressed as a ratio (1.xx:1). SRL is the measurement of reflected energy expressed in decibels (dB). Connectors and termination techniques are major sources of reflected energy and can significantly deteriorate system VSWR or SRL. The difference between VSWR and SRL is no more than how the reflected energy is measured.

Structural Return Loss (SRL) is expressed as VSWR (Voltage Standing Wave Ratio) by the following formula:

VSWR = (1 + 10(RL/20)) (10(RL/20) - 1)


Power vs. Temperature Derating Factors

The chart below recalculates the power handling capability of a coaxial cable at various temperatures.

Harbour Industries • 4744 Shelburne Road • Shelburne • Vermont • 05482 • USA • 802-985-3311 21

Attenuation vs. Temperature Correction Factor for Coaxial

The chart below recalculates the attenuation of a coaxial cable at various temperatures.


Shielding Effectiveness Test Method

Harbour’s LL, SB, and SS Coaxial Cables

Designs for Improved Shielding Effectiveness


Harbour Industries has been manufacturing strip braided expanded PTFE dielectric coaxial cable (LL series) and strip braided solid PTFE dielectric coaxial cable (SB series) since 1988. The strip braid design is a proven, effective shield configuration. Flat strips of silver plated copper are braided over the dielectric, then an intermediate aluminum mylar or aluminum kapton tape is applied under a silver plated copper round wire braid.

The need for improved shielding effectiveness High frequency cable and assemblies have been used in environments requiring a high level of shielding such as commercial and military aviation, defense systems, antenna systems and microwave test leads. Today, cellular and personal communication systems require cable and assemblies with the same high level of shielding. Cables must provide adequate isolation to preserve the integrity of the system and to avoid interference with over-the-air communications.

Harbour supplies cable assembly houses with reliable high performance cable. Test data must be given, including impedance, attenuation, structural return loss, and shielding effectiveness. Since the strip braid composite configuration had previously been used and published data existed, there seemed to be little need for testing cables for shield effectiveness. Later, however, it was discovered that many cable manufacturers made general statements about shielding, but did not perform shielding effectiveness tests, certainly not at frequencies above 1 GHz. At best, one RF leakage number was given for a given shield configuration. Test procedures were difficult to obtain.

A new, improved shield configuration In 1993, Harbour designed a new SS series of high frequency coaxial cables with a new shield design of silver plated copper strip spiraled around a solid PTFE dielectric. Since these cables were frequently used as flexible alternatives for semi-rigid coax, it was time to develop a reliable, repeatable test procedure for shielding effectiveness. RF leakage and transfer impedance were considered in developing a test method. Other methods, such as open field antenna sites, absorbing clamps, and TEM cells were deemed less reliable in comparing one cable to another.

Shielding effectiveness (RF leakage and transfer impedance)Radiation, or the transformation of energy out of a coaxial cable, is known as RF leakage.The formula for RF leakage is as follows:

dB = 10 log10 Pt Pi RF leakage, measured in decibels (dB), compares the input power level (Pi) to the power level propagating in the test chamber (Pt). The power in the test chamber is a function of the chamber itself and the attenuation, impedance and velocity of propagation of the cable under test. Importantly, the ability of the shield to attenuate the energy passing through it enables comparison of various shield configurations. The transfer impedance of a coaxial cable is defined as the ratio of the voltage in the disturbed circuit to the current flowing in the interfering circuit. The current on one surface of the shield is related to the voltage drop generated by this current on the opposite surface of the shield. This value depends solely on the shield construction.

24Harbour Industries • 4744 Shelburne Road • Shelburne • Vermont • 05482 • USA • 802-985-3311

Test setupShielding effectiveness testing was performed to evaluate the relative ratings of different cables. Testing was performed in accordance with MIL-T-81490, with actual measured values difficult to substantiate. Repeatability was questionable. Therefore, the following triaxial test assembly was constructed in accordance with MIL-C-39012C for RF leakage.

A Hewlett Packard Network Analyzer was calibrated and used with the triaxial test assembly as shown in Figure 2. To differentiate cable leakage from connector leakage, 4 and 8 inch test cables were used. For connector leakage, a test sample of 8 inches versus 4 inches will not increase the measured leakage. For a cable leakage, the longer sample will increase the measured leakage by +6 dB. Therefore, if the longer cable causes a 6 dB change in measured leakage, it can be deduced that the leakage is coming from the cable and not the connector or connector/cable interface.

Figure 2: Shielding effectiveness test setup

Figure 1: Triaxial test assembly


The following shielding effective test procedure was developed:

*Connect a semi-rigid calibration cable within the leakage cell into the internal matched termination.

*Solder all connections for calibration to eliminate any leakage.

*Connect the input side of the leakage cell to port one of the analyzer and connect the output side of the leakage cell to the analyzer with the other test cable. (The calibration measurement of the system must meet the device under test levels by at least -6 dB. For Harbour’s setup, the specification was -90 dB prior to testing, with a calibration reading of - 96 dB minimum required prior to testing.)

*Measure the insertion loss over the band of the sweep.

*Once the required value is met for calibration, store the data to memory in the analyzer.

*Disconnect the calibration samples within the cell.

*Move the coaxial cable out of the cell, and insert the test sample between the calibration cable connection just separated.

*Reconnect the test cell and re-measure the insertion loss. Adjust connections to eliminate false leakage signals from inhibiting the measurement. (Use aluminum foil to prevent connector leakage.)

*Slide the short circuit rod within the leakage cell back and forth to cover at least one half wavelength of travel at the test frequency. (This is to phase tune the leakage signals with the output connector, maximizing the signal at any variable phase.

Note that the sliding of the variable short circuit is not required when making swept frequency measurements since phase tuning will be accomplished over the band. The sliding short circuit is used for a fixed, single frequency measurement test to ensure there is not a null resonance within the cavity.)

*Once a proper measurement has been reached, and the measured leakage signal resembles that of the test cable, plot the result and store it to a disk file, similar to all other microwave test measurements. (This plot has the stored memory trace of the fixture calibration and the test cable. The intent is to notice the measurement noise level, relative to the leakage from the test cable.)

*Disconnect the leakage cell, reconnect the calibration test cables within the cell to make sure the noise floor is still within the required levels given above.

Typically, leakage measurements over frequency can have two responses. If there is a physical gap or leak, the leakage response will show more leakage as frequency is increased. If there is a conductive, or absorptive path for leakage, the low frequency leakage may appear higher, since this path is shorter at lower frequencies and attenuating the signal more at higher frequencies. Any leakage due to a cutoff effect similar to an opening in a shield will show more leakage as the frequency is increased.


RF leakage testing was performed from 50 MHz to 18 GHz with the following results:

Table 1: Comparison of Harbour’s LL, SB, and SS cables to MIL-C-17 constructionsSample Shield

ConfigurationRF

LeakageNumber Cable type1 M17/111-RG303 single, round wire

silver plated copper braid- 50 dB

2 M17/60-RG142 double, round wiresilver plated copper braids

- 75 dB

3 LL142 silver plated copper strip braidround wire, silver plated copper braid

- 80 dB

4 SB142 silver plated copper strip braidaluminum kapton

- 90 dB

5 SS402 spiral wrapped, silver plated copper stripround wire, silver plated copper braid

-110 dB

6 SS405 spiral wrapped, silver plated copper stripround wire, silver plated copper braid

-110 dB

7 M17/133-RG405 solid copper tube -110 dB

Results for the MIL-C-17 cables are consistent with previously reported results. Single and double braided shield configurations, even those with greater than 90% braid coverage, still exhibit the highest RF leakage at -50 dB and - 75 dB respectively.

LL and SB cables with composite stripbraid/round wire braid configurations exhibited lower RF leakage in the -80 dB to - 90 dB range.

Spiral strip shields (Harbour’s SS cables) further improve RF leakage to - 110 dB. The tightly applied strip most closely approximates the solid copper tube of semi-rigid cable showing leakage levels down in the noise floor of the test equipment.

Figure 3: Shielding effectiveness, a comparative analysis


Sample Shield configuration RF Leakage1 1 round braid (M17/111-RG303) - 50 dB2 2 round wire braids (M17/60-RG142) - 75 dB3 1 strip braid + 1 round braid (LL142) - 80 dB4 1strip braid + tape inerlayer + 1 round wire braid (SB142) - 90 dB5 1 spiral wrapped strip + 1 round wire braid (SS402) -110 dB6 1 spiral wrapped strip + 1 round wire braid (SS402) -110 dB7 solid copper tube (M17/133-RG405) -110 dB

Table 2: Special SS402 and SS405 testing

Sample Bend radius of the sample

Minimum recom-mended bend radius

RF Leakage ChangeNumber Cable type5 SS402, straight N/A .82˝ - 110 dB8 SS402, 360 loop .52” .82˝ - 110 dB + 10 dB6 SS405, straight N/A .52˝ - 110 dB9 SS405, 360 loop .52” .52˝ - 110 dB -0-

Sample 8: An 8 inch test cable of SS402 with a 360° loop was bent into a tight .52˝ radius to fit inside the test cell. This bend radius exceeded the .82˝ minimum recommended bend radius for the cable (five times the .163˝ diameter). RF leakage was measured at - 100 dB. When the spiral strip shielded SS402 cable was tightly bent, the inner tape separated just enough to cause a + 10 dB change in shielding effectiveness.

Sample 9: An 8 inch test cable of SS405 with a 360° loop and was bent with a .52˝ radius, then inserted into the test cell. This bend radius was the minimum recommended bend radius of the cable (five times the .104˝ diameter). The RF leakage was measured at - 110 dB, the same as the straight length of the cable and the noise floor of the equipment.

The above tests show that bent lengths of Harbour’s SS cables exhibit the same shielding effectiveness level as straight lengths, if the minimum bend radius is not exceeded.

Using the shielding effectiveness test method as a design toolHarbour’s RF leakage cell allows the convenient testing of many different cables at frequencies up to 18 GHz. It provides an effective, reliable and repeatable method not only for testing, but for the design of effective shield configurations. Physical characteristics of the braid configuration -- braid angles, picks per inch, number of carriers, braid coverage, tape widths, tape thickness, and percent overlap of metal tapes -- can be tested and modified for optimal shielding effectiveness.

28 Harbour Industries • 4744 Shelburne Road • Shelburne • Vermont • 05482 • USA • 802-985-3311

Corporate Headquarters & Manufacturing Facility4744 Shelburne RoadP. O. Box 188Shelburne, VT 05482

Phone (802) 985-3311Toll Free (800) 659-4733Fax (802) 985-9534

e-mail: [email protected]

Canadian Sales Office & Manufacturing FacilityHarbour Industries (Canada) LTD1365 Industrial Blvd.Farnham, Quebec Canada J2N 2X3

Phone (450) 293-5304Fax (450) 293-2421

www.harbourind.com

HBR0410

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