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TRANSCRIPT
Calculators
RF Cafe Calculator Workbookv5.1
by RF Cafe
Please report any errors here:
AttenuatorsBandpass FiltersCascaded ComponentsCoils / InductorsDirectional CouplersHighpass FiltersLowpass FiltersMixer Frequency ConversionNoise Figure↔TempPath Loss, 1-WayPath Loss, 2-Way
Click here to check to purchase unlocked version Click here to check for Updates Propagation TimeRadar Blind SpeedRectangular CavityVSWR↔RL↔GammaVoltage Divider
[email protected] Revision History
This locked version of the RF Cafe Calculator Workbook is provided free of charge. You are encouraged to distribute it freely, as long as no changes are made and you require no payment for it. An unlocked version is available for purchase. -- Check Back Often for Updates --
Disclaimer: Your use of this RF Cafe Calculator Workbook indicates that you accept full responsibility for the results produced, and that you agree to hold harmless Kirt Blattenberger, RF Cafe, and it assigns, for any damages that may result from its use.
Note: This file is supplied in a format compatible with versions back to Excel 97. Saving the file in Excel 2003 format will greatly reduce the file size.
Resistive Attenuator Calculator
Attenuation : 3 dB K= 1.995
Tee (T) Pad
8.55 8.55
Zin 50 141.95 50 Zout
Red values indicate unallowed Zin:Zout combination.
17.61
Zin 50 292.46 292.46 50 Zout
RF Cafe Calculator Workbook, v5.1, by RF Cafe
Click here for the online version Click here to check for Updates
Pi (p) Pad
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Bandpass Filter Response
Order: 5Upper: 15 MHzLower: 10 MHzRipple: 1Graph Parameters (101 pts)Stop: 20 MHzStart: 5 MHzStep: 0.15 MHz
Gain (dB)Freq (MHz) Butterworth Chebyshev
5 -69.90 -87.675.15 -68.08 -85.825.3 -66.28 -83.975.45 -64.49 -82.145.6 -62.71 -80.305.75 -60.93 -78.475.9 -59.16 -76.646.05 -57.39 -74.816.2 -55.61 -72.976.35 -53.84 -71.116.5 -52.05 -69.246.65 -50.26 -67.366.8 -48.46 -65.456.95 -46.64 -63.527.1 -44.80 -61.567.25 -42.94 -59.577.4 -41.06 -57.547.55 -39.16 -55.467.7 -37.22 -53.337.85 -35.25 -51.14
8 -33.25 -48.898.15 -31.20 -46.568.3 -29.11 -44.158.45 -26.97 -41.638.6 -24.77 -38.998.75 -22.52 -36.218.9 -20.20 -33.269.05 -17.82 -30.109.2 -15.38 -26.699.35 -12.89 -22.939.5 -10.38 -18.739.65 -7.91 -13.919.8 -5.59 -8.299.95 -3.58 -2.4110.1 -2.04 0.0010.25 -1.03 -0.6710.4 -0.47 -1.0010.55 -0.19 -0.7110.7 -0.07 -0.2410.85 -0.02 0.00
11 -0.01 -0.1411.15 0.00 -0.4911.3 0.00 -0.8211.45 0.00 -0.9911.6 0.00 -0.9611.75 0.00 -0.7511.9 0.00 -0.4512.05 0.00 -0.1712.2 0.00 -0.0112.35 0.00 -0.0512.5 0.00 -0.2512.65 0.00 -0.5412.8 0.00 -0.8012.95 0.00 -0.9713.1 0.00 -0.9913.25 0.00 -0.8613.4 0.00 -0.6013.55 0.00 -0.2913.7 -0.01 -0.0613.85 -0.03 -0.01
14 -0.06 -0.2014.15 -0.14 -0.5514.3 -0.28 -0.8814.45 -0.52 -1.0014.6 -0.92 -0.7814.75 -1.51 -0.2414.9 -2.33 -0.0815.05 -3.38 -1.8815.2 -4.62 -5.5115.35 -6.01 -9.4015.5 -7.47 -12.9515.65 -8.98 -16.1015.8 -10.49 -18.9215.95 -11.98 -21.4716.1 -13.45 -23.8016.25 -14.88 -25.9516.4 -16.26 -27.9416.55 -17.61 -29.8116.7 -18.91 -31.5616.85 -20.17 -33.22
17 -21.39 -34.7917.15 -22.57 -36.2817.3 -23.72 -37.7017.45 -24.83 -39.0617.6 -25.91 -40.3617.75 -26.96 -41.6217.9 -27.97 -42.8218.05 -28.96 -43.9818.2 -29.93 -45.1018.35 -30.86 -46.1818.5 -31.78 -47.2218.65 -32.67 -48.2318.8 -33.53 -49.2218.95 -34.38 -50.1719.1 -35.21 -51.0919.25 -36.01 -51.9919.4 -36.80 -52.8719.55 -37.58 -53.7219.7 -38.33 -54.5519.85 -39.07 -55.37
20 -39.79 -56.16 RF Cafe Calculator Workbook, v5.1, by RF Cafe
Click here for the online version (Butterworth) Click here to check for Updates
Click here for the online version (Chebyshev)
dB (Cheby)
Home
4 6 8 10 12 14 16 18 20 22-100.00
-90.00
-80.00
-70.00
-60.00
-50.00
-40.00
-30.00
-20.00
-10.00
0.00
ButterworthChebyshev
Frequency
Gai
n (d
B)
System Cascade Parameter Calculator
Input Power: 0 dBm Output Values
Component Name Gain (dB) NF (dB) IP2 (dBm) IP3 (dBm) Pwr (dBm) Gain (dB) NF (dB) IP2 (dBm) IP3 (dBm)1 0 0 999 999 0.00 0.00 0.00 999.00 999.002 0 0 999 999 0.00 0.00 0.00 992.98 995.993 0 0 999 999 0.00 0.00 0.00 989.46 994.234 0 0 999 999 0.00 0.00 0.00 986.96 992.985 0 0 999 999 0.00 0.00 0.00 985.02 992.016 0 0 999 999 0.00 0.00 0.00 983.44 991.227 0 0 999 999 0.00 0.00 0.00 982.10 990.558 0 0 999 999 0.00 0.00 0.00 980.94 989.979 0 0 999 999 0.00 0.00 0.00 979.92 989.4610 0 0 999 999 0.00 0.00 0.00 979.00 989.0011 0 0 999 999 0.00 0.00 0.00 978.17 988.5912 0 0 999 999 0.00 0.00 0.00 977.42 988.2113 0 0 999 999 0.00 0.00 0.00 976.72 987.8614 0 0 999 999 0.00 0.00 0.00 976.08 987.5415 0 0 999 999 0.00 0.00 0.00 975.48 987.24
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Inductance
Single-Layer, Air-Core Coil Straight Wire
Diameter (2r): 0.001 inDiameter (d): 0.25 in Length (x): 1 in
Length (L): 0.5 in Inductance (Low Freq): 38.3237722 nH# Turns: 30 Inductance (High Freq): 37.0537722 nH
Inductance: 2.29591837 uH
Inductance: 2.29591837 uHDiameter: 0.25 in
Length: 0.5 in# Turns: 30
RF Cafe Calculator Workbook, v5.1, by RF Cafe
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Wire diameter on RF Cafe.
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Directional Couplers
Input (Port 1) Mainline Loss Transmitted (Port 2) Coupling Loss Only0 dBm 1 dB -4.010517066 dBm -3.010517066 dB
Coupling Factor Directivity Isolation-3.0103 dB 40 dB 43.0103 dB
Coupled (Port 3) Isolated (Port 4)-3.0103 dBm -43.0103 dBm
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Mainline (l/4)
Highpass Filter Response
Order: 5Cutoff: 10 MHzRipple: 1Graph Parameters (101 pts)Stop: 30 MHzStart: 5 MHzStep: 0.25 MHz
Gain (dB)Freq (MHz) Butterworth Chebyshev
5 -30.107239 -45.3060465.25 -27.990973 -42.8385125.5 -25.974718 -40.4428245.75 -24.05034 -38.108173
6 -22.211056 -35.8245556.25 -20.451319 -33.5825366.5 -18.766742 -31.3730326.75 -17.154071 -29.187111
7 -15.611173 -27.0158067.25 -14.137041 -24.849947.5 -12.731802 -22.6799767.75 -11.396685 -20.495942
8 -10.133945 -18.2875298.25 -8.9466891 -16.0445818.5 -7.8385932 -13.7585258.75 -6.8134881 -11.425875
9 -5.8748332 -9.05623269.25 -5.0251362 -6.6890849.5 -4.2654096 -4.42323779.75 -3.594774 -2.446199910 -3.0103 -1
10.25 -2.507123 -0.219763310.5 -2.0788019 -0.000523210.75 -1.7178317 -0.1021047
11 -1.416201 -0.323036711.25 -1.1658986 -0.551764111.5 -0.9593078 -0.741029111.75 -0.7894679 -0.87682
12 -0.650213 -0.959838612.25 -0.5362126 -0.996489212.5 -0.4429439 -0.994859412.75 -0.3666252 -0.9630262
13 -0.3041275 -0.908397913.25 -0.2528832 -0.837501213.5 -0.2107969 -0.755955313.75 -0.1761649 -0.6685147
14 -0.1476056 -0.579136714.25 -0.1239998 -0.49105214.5 -0.1044412 -0.406832814.75 -0.0881956 -0.3284589
15 -0.0746677 -0.257381815.25 -0.0633743 -0.194587215.5 -0.0539223 -0.140657515.75 -0.0459915 -0.0958334
16 -0.0393203 -0.06007316.25 -0.033695 -0.03310916.5 -0.0289399 -0.014501216.75 -0.0249109 -0.0036842
17 -0.0214892 -8.703E-0617.25 -0.0185765 -0.002777617.5 -0.0160916 -0.011274517.75 -0.013967 -0.0247876
18 -0.0121465 -0.042626818.25 -0.0105834 -0.064136718.5 -0.0092386 -0.088705618.75 -0.0080792 -0.1157704
19 -0.0070777 -0.144819319.25 -0.0062111 -0.175392219.5 -0.0054597 -0.207079719.75 -0.004807 -0.2395209
20 -0.0042391 -0.272400420.25 -0.0037441 -0.305444920.5 -0.0033119 -0.338419520.75 -0.002934 -0.3711244
21 -0.0026029 -0.403391221.25 -0.0023125 -0.435079121.5 -0.0020573 -0.466072221.75 -0.0018327 -0.4962765
22 -0.0016348 -0.525616922.25 -0.0014602 -0.554034622.5 -0.0013059 -0.581485722.75 -0.0011693 -0.6079381
23 -0.0010482 -0.633370823.25 -0.0009408 -0.657771623.5 -0.0008454 -0.68113623.75 -0.0007605 -0.703466
24 -0.0006849 -0.724769124.25 -0.0006175 -0.745057324.5 -0.0005573 -0.764346224.75 -0.0005035 -0.7826548
25 -0.0004554 -0.800004125.25 -0.0004122 -0.816417425.5 -0.0003736 -0.831919225.75 -0.0003388 -0.8465353
26 -0.0003076 -0.860292326.25 -0.0002796 -0.873217226.5 -0.0002543 -0.885337426.75 -0.0002315 -0.8966803
27 -0.0002109 -0.907273427.25 -0.0001924 -0.917143727.5 -0.0001756 -0.926318327.75 -0.0001604 -0.9348235
28 -0.0001466 -0.942685228.25 -0.0001342 -0.94992928.5 -0.0001228 -0.956579528.75 -0.0001126 -0.962661
29 -0.0001032 -0.96819729.25 -9.474E-05 -0.973210429.5 -8.701E-05 -0.977723329.75 -7.997E-05 -0.9817571
30 -7.355E-05 -0.9853325 RF Cafe Calculator Workbook, v5.1, by RF Cafe
Click here for the online version (Butterworth) Click here to check for Updates
Click here for the online version (Chebyshev)
dB (Cheby)
Home
0 5 10 15 20 25 30 35-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
ButterworthChebyshev
Frequency
Gai
n (d
B)
Lowpass Filter Response
Order: 5Cutoff: 10 MHzRipple: 1Graph Parameters (101 pts)Stop: 25 MHzStart: 0 MHzStep: 0.25 MHz
Gain (dB)Freq (MHz) Butterworth Chebyshev
0 0 00.25 0.00 -0.01744750.5 0.00 -0.06834480.75 0.00 -0.148558
1 0.00 -0.25181371.25 0.00 -0.37045111.5 0.00 -0.49620671.75 0.00 -0.6208981
2 0.00 -0.73693332.25 0.00 -0.83763962.5 0.00 -0.91744342.75 0.00 -0.9719538
3 0.00 -0.99799983.25 0.00 -0.99366843.5 0.00 -0.95837413.75 0.00 -0.892984
4 0.00 -0.80000414.25 0.00 -0.68381664.5 0.00 -0.55092424.75 0.00 -0.4101146
5 0.00 -0.27240045.25 -0.01 -0.15053845.5 -0.01 -0.05794215.75 -0.02 -0.0069224
6 -0.03 -0.0064636.25 -0.04 -0.0600736.5 -0.06 -0.1644246.75 -0.08 -0.3092835
7 -0.12 -0.47873177.25 -0.17 -0.65314397.5 -0.24 -0.81125057.75 -0.33 -0.9318119
8 -0.44 -0.99485948.25 -0.59 -0.98291198.5 -0.78 -0.88311768.75 -1.01 -0.6921849
9 -1.30 -0.42761879.25 -1.64 -0.15053119.5 -2.04 -0.00032529.75 -2.50 -0.208055410 -3.01 -1
10.25 -3.58 -2.403672310.5 -4.20 -4.21879810.75 -4.86 -6.2016342
11 -5.56 -8.191611211.25 -6.28 -10.11242211.5 -7.03 -11.93675911.75 -7.79 -13.660206
12 -8.57 -15.2876812.25 -9.35 -16.82725312.5 -10.13 -18.28752912.75 -10.92 -19.676605
13 -11.70 -21.00173513.25 -12.47 -22.2692813.5 -13.24 -23.48476613.75 -14.01 -24.652987
14 -14.76 -25.77810514.25 -15.51 -26.86374714.5 -16.24 -27.91308614.75 -16.97 -28.928911
15 -17.68 -29.91368115.25 -18.39 -30.86958315.5 -19.09 -31.7985615.75 -19.77 -32.702356
16 -20.45 -33.58253616.25 -21.12 -34.44051316.5 -21.78 -35.27756516.75 -22.43 -36.094858
17 -23.07 -36.89345217.25 -23.70 -37.67431717.5 -24.32 -38.43834417.75 -24.93 -39.186354
18 -25.54 -39.91910118.25 -26.14 -40.63728718.5 -26.73 -41.34155918.75 -27.31 -42.03252
19 -27.88 -42.71073119.25 -28.45 -43.37671519.5 -29.01 -44.03096119.75 -29.56 -44.673929
20 -30.11 -45.30604620.25 -30.65 -45.92771820.5 -31.18 -46.53932320.75 -31.70 -47.141219
21 -32.22 -47.73374521.25 -32.74 -48.31721821.5 -33.25 -48.89194221.75 -33.75 -49.458201
22 -34.24 -50.01626722.25 -34.73 -50.56639722.5 -35.22 -51.10883622.75 -35.70 -51.643815
23 -36.17 -52.17155723.25 -36.64 -52.69227323.5 -37.11 -53.20616523.75 -37.57 -53.713423
24 -38.02 -54.21423224.25 -38.47 -54.70876924.5 -38.92 -55.197224.75 -39.36 -55.679687
25 -39.79 -56.156385 RF Cafe Calculator Workbook, v5.1, by RF Cafe
Click here for the online version (Butterworth) Click here to check for Updates
Click here for the online version (Chebyshev)
dB (Cheby)
Home
0 5 10 15 20 25 30-60
-50
-40
-30
-20
-10
0
ButterworthChebyshev
Frequency
Gai
n (d
B)
Mixer Frequency Conversion
Input Ä OutputHigh: 950 — — Upper Sideband: High: 1750Low: 900 Low: 1700
| Lower Sideband: High: 150Units Local Oscillator Low: 100MHz 800
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Noise Figure (NF) - to - Noise Temperature (NT)
Noise Figure: 3.01 dB Noise Temperature: 289.96 K
Noise Temperature: 289.96 K Noise Figure: 3.01 dB
RF Cafe Calculator Workbook, v5.1, by RF Cafe
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1-Way Path Loss (Radio)
Transmitter Path ReceiverPower Out Distance Power @ Antenna
10 kW 31 km -26.25442 dBmAntenna Gain Attenuation
40 dBi 136.25 dB Antenna GainPower @ Antenna 45 dBi
100000 kW System GainFrequency -5 dB
5 GHz Detector PowerWavelength 13.74558 dBm
0.059958 m
RF Cafe Calculator Workbook, v5.1, by RF Cafe
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Do not specify a path distance less than l/10.
2-Way Path Loss (Monostatic Radar)
Transmitter Path Target ReceiverPower Out Distance to Target Power @ Target Power @ Antenna
10 kW 31 km -26.25442 dBm -117.5313 dBmAntenna Gain Attenuation
40 dBi to/from Target Radar Cross-Section Antenna GainPower @ Antenna 136.25 dB 9 45 dBi
100000 kW RCS Gain System GainFrequency 44.98 dB -5 dB
5 GHz Detector PowerWavelength -77.53 dBm
0.059958 m
RF Cafe Calculator Workbook, v5.1, by RF Cafe
Click here for the online version Click here to check for Updates
m2
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Do not specify a path distance less than l/10.
RF Energy Propagation Time
Distance Propagation Speed Frequency1 km 299792.458 mi/s 300 MHz
Relative Dielectric Propagation Time Wavelength1 3.335640952 us 0.9993082 m
# of Wavelengths1000.6923
RF Cafe Calculator Workbook, v5.1, by RF Cafe
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Radar Blind Speed
Transmitter Target Frequency Blind Speeds
3 GHz 1st 53.277 ft/sWavelength 2nd 106.554 ft/s
0.327857 ft 3rd 159.830 ft/sPRF 4th 213.107 ft/s325 pps 5th 266.384 ft/s
RF Cafe Calculator Workbook, v5.1, by RF Cafe
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Radial
Rectangular Cavity Resonance
ModeResonant
m n p Frequency Dimensions (a<b<c)0 1 1 7.50 GHz a: 1.30 cm1 0 1 12.04 GHz b: 2.25 cm1 1 0 13.32 GHz c: 4.34 cm1 1 1 13.76 GHz e: 8.854E-12 F/m0 1 2 9.60 GHz m: 1.257E-06 H/m1 0 2 13.44 GHz1 1 2 15.00 GHz0 2 2 15.01 GHz2 0 2 24.07 GHz2 2 0 26.63 GHz2 2 1 26.86 GHz
RF Cafe Calculator Workbook, v5.1, by RF Cafe
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TEm,n,p & TMm,n,p
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b, n
a, m
c, p
e, m
VSWR Conversions & Mismatch
Conversions VSWR Mismatch Effects
VSWR: 1.20 :1 VSWR A VSWR BReturn Loss: 20.83 dB 2.5 :1 2 :1
G: 0.09 0.428571 0.333333Amplitude Error: +1.16 / -1.34 dB
VSWR: 1.20 :1 Phase Error: ± 8.19 °Return Loss: 20.83 dB Max VSWR: 5.00 :1
G: 0.09 Min VSWR: 1.25 :1
VSWR: 1.20 :1 VSWR Reduction By Matched AttenuatorReturn Loss: 20.92 dB
G: 0.09 Attenuator Load VSWR3 dB 2 :1
15.54243 9.542425Improved VSWR Note: This only holds exactly
1.40 :1 when the attenuator is aperfect VSWR match (1:1)
RF Cafe Calculator Workbook, v5.1, by RF Cafe at both ports.
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Resistive Voltage Divider
Vcc: 10 V
R1: 500 Ω50.00 mW
Vout: 5.00 VI: 10.00 mA
R2: 1000 Ω100.00 mW 1000 Ω
100.00 mW
Vee: 0 V 500
RF Cafe Calculator Workbook, v5.1, by RF Cafe
Click here for the online version Click here to check for Updates
RLoad:
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RF Cafe Calculator WorkbookRevision History
Version Description1.0 Initial release.2.0 Added Rectangular Cavity, Coils3.0 Added Cascaded Components, Mixer Frequency Conversion4.0 Added Directional Couplers5.0 Added Propagation Time5.1 Corrected straight wire inductor formula
Please report any errors here:
Click here to check to purchase unlocked version Click here to check for Updates
Disclaimer: Your use of this RF Cafe Calculator Workbook indicates that you accept full responsibility for the results produced, and that you agree to hold harmless Kirt Blattenberger, RF Cafe, and it assigns, for any damages that may result from its use.
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