gprs umts embedded antenna application note part ii

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Tel +49 6102 799 128 Page 1 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com Embedded Antenna Application Note George Negreanu Part II, 09-12-2010 www.linkedin.com/in/gsmgps GSM GPRS 3G Embedded Antenna Application Note Applications: Multiband SMD antenna on 24mm x 5.5mm x 4.4mm only Embedded GSM/UTMS Antenna M2M Automotive Automatic Meter Reading Healthcare Point of Sale Tracking George Negreanu @ Round Solutions GmbH & Co. KG Hans-Boeckler-Str. 16 63263 Neu-Isenburg Tel: +49 (0)6102 799 28 0 Fax: +49 (0)6102 799 28 199 Web: http://www.roundsolutions.com LinkedIn: http://www.linkedin.com/in/gsmgps Blog: http://gsmantenna.wordpress.com/ Tweeter: http://twitter.com/George_Negreanu If you need further informations or support please feel free to email me. Antenna tuning and PCB optimization service available.

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DESCRIPTION

Ceramic Embedded multiband cellular antenna builds on the success of several SMD tri-band antennas, by extending functionality to cover all worldwide cellular bands between 800 MHz and 2200 MHz – GSM, CDMA, DCS, PCS, WCDMA, UMTS, HSPA, GPRS and EDGE.

TRANSCRIPT

Page 1: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 1 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

GSM GPRS 3G Embedded Antenna Application Note

Applications:

Multiband SMD antenna on 24mm x 5.5mm x 4.4mm only Embedded GSM/UTMS Antenna

● M2M● Automotive● Automatic Meter Reading● Healthcare● Point of Sale● Tracking

George Negreanu @ Round Solutions GmbH & Co. KG

Hans-Boeckler-Str. 1663263 Neu-IsenburgTel: +49 (0)6102 799 28 0Fax: +49 (0)6102 799 28 199Web: http://www.roundsolutions.com

LinkedIn: http://www.linkedin.com/in/gsmgpsBlog: http://gsmantenna.wordpress.com/Tweeter: http://twitter.com/George_Negreanu

If you need further informations or support please feel free toemail me. Antenna tuning and PCB optimization service available.

Page 2: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 2 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

Table of Contents

1 Introduction 3

2 Mechanical Specification 4

3 Electrical Specification 4

4 Measurement 5

4.1 Electrical Characteristics 5

5 Radiation Characteristics 6

6 Gain Pattern Measurement Data 7

7 Soldering Recommendations 9

7.1 Land Pattern 9

7.2 Placing of antenna 9

8 Soldering Profile 11

9 Packing 11

10 Development Process Proposal 12

Page 3: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 3 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

1 Introduction

Multiband SMD antenna on 24 mm x 5.5 mm x 4.4 mm only

The ANT-GXE474 multiband cellular antenna builds on the success of several SMD tri-band antennas, by extending functionality to cover all worldwide cellular bands between 800 MHz and 2200 MHz – GSM, CDMA, DCS, PCS, WCDMA, UMTS, HSPA, GPRS and EDGE.

This IFA antenna is particularly suited for mounting on the edge of a PCB. It measures 24 mm x 5.5 mm x 4.4 mm and is delivered on tape and reel for efficient and accurate assembly.

The ANT-GXE474 is also available as mirrored design (ANT-GXE474M) if the standard design will not fulfil layout/alignment requirements.

If tuning is required it can be tuned for the device environment with no need for new tooling. The antenna is robust enough to meet all temperature and mechanical specifications required for automotive environments.

Typical applications include automotive, remote monitoring, M2M, telematics, telemedicine, AVL, utility metering, mobile devices, point-of-sale, navigation, location based services and communication products.

Application Note based on antenna ANT-GXE474 GSM GPRS and 3G

Page 4: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 4 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

3 Electrical Specifications

Item GSM850/900 GSM 1800 GSM 1900 UMTS 2100Frequency [MHz]

824 ~ 960 1710 ~ 1850 1850 ~ 1990 1920 ~ 2170

VSWR 3.0 : 1 max. 3.0 : 1 max. 3.0 : 1 max. 3.0 : 1 max.Peak Gain 1.5 dBi 3.5 dBi 3.5 dBi 3.5 dBiMin Eff [%] 45% 79% 87% 90%Polarization LinearRadiation Pattern

Omni-directional

Nominal Impedance

50 Ohm

Ground plane size

106 mm x 45 mm

Matching tuning

Tuning by changed ground plane / matching circuit as option

These values are measured on the matched reference test board.

2 Mechanical specification

Electrode SilverDimensions in mm (L x W x H) 24.0 x 5.5 x 4.4Operating Temperature -35 ~ +85

Unit: mm Tolerance 0.15 mm

Page 5: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 5 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

4.1 Electrical CharacteristicAntenna matching on the reference test board S11(VSWR) Quad Band (GSM850, DCS, PCS, UMTS)

4 MeasurementSet for measurement with test board version

Board size: 114x45mmAntenna Radiation the coordinate system[X axis: the axis of rotation]

Page 6: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 6 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

5 Radiation CharacteristicsMeasurement setup, 6 m x 3 m x 3 m Anechoic Chamber, Matching on the standard test board (114 mm x 45 mm) ,Temperature 25 ºC / Humidity 50~55%

Page 7: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 7 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

6 Gain pattern measurement data

Page 8: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 8 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

Page 9: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 9 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

7 Soldering recommendations7.1 Soldering Land Pattern

A 25B 5.5C 2.3D 20.4E 1.8F 1.9

7.2 Placing of antenna

Thickness(mm)

impedance(ohm)Area1 Area2

0.8 66.89 44.561.0 65.01 50.011.6 61.42 60.49

Dimensions of PCB tracks are calculated on

PCB with FR4 1mm. If you use other thickness of FR4 then the impedance of the PCB tracks will be changed and mismatched.The drawing above shows a 4 component matching ciruit. For optimal performance a 5-components matching circuit is recommended:

Page 10: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 10 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

C1:

3.6 pF (GJM Murata) 402C2:

N/AC3:

0.5 pF (GJM Murata) 402L1:

3.9 nH (WE-MK Würth) 402L2:

1.8 pF (Tayo) 402 (towards C1)2.7 nH (WE-MK Würth)402 (toward C2)Remarks:

• C1=3.6 pF (Murata GJM) interferes with the critical frequency 960 MHz. With smaller values the frequency can be shifted to higher frequency

• C3=0.5 pF (Murata GJM) optimises the middle of the upper band

(GSM1800, 1900, UMTS). The value can be between 0 und 1 pF •

L2 consists of 2 components (1.8 pF & 2.7nH which should be placed as close as possible)

• Take care that you use same manufacturer, same value and same size of components (402) in mass production. It has to be the same

than with your tested and measured prototype PCBs• Take care that your prototypes and your mass production PCB

material is 100% the same• The quality of matching circuit components influences the

performance of the matching circuit. We strongly recommend using 0402 type of SMD components.

3.6 pF (GJM Murata) 402

0.5 pF (GJM Murata) 402

3.9 nH (WE-MK Würth) 4021.8 pF (Tayo) 402

2.7 nH (WE-MK Würth)402

Page 11: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 11 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

8 Soldering profileThis product is designed for reflow soldering only. Do not use flow (wave) soldering. � Use non-activated flux

(Cl content 0.2% max.) � Follow the recommended

soldering conditions to avoid damage.

� Reflow-cycle is max. 3 times.

9 PackingTape Dimension (unit: mm)

Surface resistance 1) Carrier tape : Max 1011Ω 2) Cover tape : Max 1011Ω 3) Reel : Max 1011Ω

Page 12: GPRS UMTS Embedded Antenna Application Note Part II

Tel +49 6102 799 128 Page 12 Fax +49 6102 799 28 199 [email protected] Round Solutions GmbH & Co KG www.roundsolutions.com

Embedded Antenna Application Note George NegreanuPart II, 09-12-2010 www.linkedin.com/in/gsmgps

Description of Reel

Material: Plastic reel, GPPS (General Purpose Poly Styrene) resin

10 Development process proposal� Design review of PCB layout and PCB tracks by Round Solutions

(PDF file with pictures of PCB layers, size of PCB (ground plane) and pictures of product or graphics of the product

� Sample PCB made by customer with same value of components (C1, C2, L1, L2)

� Prototype PCB with same value of components in final plastic enclosure

� Optimisation of PCB tracks and matching circuit by customer, consulting partner of customer or Round Solutions

� Production of a small lot of products and tests� Mass production