GPSDSF.35.7.A.08

## **Specification** 

Part No. : **GPSDSF.35.7.A.08** 

- Product Name : Embedded 2in1 Low Profile Stacked Patch for GPS/ GLONASS/GALILEO & SDARS (XM) 

Feature : Highest Efficiency and Gain GPS: 69.8% Efficiency @1575.42 MHz GLONASS: 78.6% Efficiency @1602 MHz SDARS (XM): 67.6% Efficiency @2338.75 MHz AR values: 

GPS: 5.0 dB typ. GLONASS: 7.5 dB typ. SDARS(XM): 3.8 dB typ. 

RHCP on GPS and GLONASS / LHCP on SDARS Ground-plane Through–Hole Mounting Pin Type Dual Feed Patch Assembly Dimensions: 35*35*7.15mm 

Tuned for Centre Positioning on a 70*70mm **RoHS Compliant** 

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## **1. Introduction** 

The GPSDSF.35.7.A.08 is a passive 35x35mm ceramic stacked patch antenna with both SDARS and GNSS capabilities. This patch provides world-class performance for both SDARS and GNSS services, with AR GPS:5.0 dB typ, GLONASS: 7.5 dB typ. SDARS(XM): 3.8 dB typ right hand circular polarization and nearly 70% efficiency at 2332.5 MHz for SDARS and 70-80% efficiency at GPS/GLONASS/GALILEO frequencies. Using one patch for both services results in the most economical and space-efficient solution for demanding applications requiring both SDARS and GNSS functionality. At just 7.15 mm in height, the GPSDSF.35 is also extremely low-profile. 

Typical Applications: 

- OEM Sharkfin Automotive Antennas 

- Truck Mounted Antenna Systems 

This antenna has been tuned and tested on a 70 x 70 mm ground plane. Custom tuning services can be provided for further optimization to customer-specific device environments. Contact your regional Taoglas sales office for support. 

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## **2. Specification** 

|Electrical<br>~~ee~~|Electrical<br>~~ee~~|
|---|---|
|Frequency<br>~~ee~~|GPS: 1575.42 ± 1.023 MHz<br>GLONASS: 1602 ± 5MHz<br>SDARS(XM) : 2338.75±6.25 MHz<br>~~ee~~|
|Centre Frequency|1591 ± 3 MHz<br>2338.75±3 MHz|
|Return Loss|GPS: -10dB max.<br>GLONASS: -10dB max.<br>SDARS(XM):-10dB max.|
|Zenith Gain|GPS: +3.4 dBi typ.<br>GLONASS: +3.6 dBi typ.<br>SDARS(XM): +4.7 dBi typ.|
|Efficiency|GPS: 69 %<br>GLONASS: 78 %<br>SDARS(XM): 67 %|
|Axial Ratio at Zenith|GPS: 5.0 dB typ.<br>GLONASS: 7.5 dB typ.<br>SDARS(XM): 3.8 dB typ.|
|Polarization|R.H.C.P. For GPS/ GLONASS<br>L.H.C.P. For SDARS(XM)|
|Impedance|50|
|Mechanical<br>~~ee~~||
|Dimensions<br>~~ee~~|35 x 35 x 7.15mm<br>GPS: 35 x 35 x 4 mm<br>SDARS: 25 x 25 x 3 mm<br>~~ee~~|
|Material|Ceramic|
|Pin Diameter|0.8mm|
|Pin Length|2.0mm|
|Weight<br>~~ll~~|22.1g|
|ENVIRONMENTAL<br>~~ll~~||
|Operation Temperature<br>~~ll~~|-40°C to +85°C|
|Humidity|Non-condensing 65°C 95% RH|



* Antenna properties were measured with the antenna mounted on 70*70mm Ground Plane 

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## **3. Antenna Characteristics** 

## **3.1 Return Loss** 

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**----- Start of picture text -----**<br>
0<br>-5<br>-10<br>-15<br>-20<br>GPS_GLONASS<br>SDARS(XM)<br>-25<br>1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (MHz)<br>(dB)<br>**----- End of picture text -----**<br>


## **3.2 Efficiency** 

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90<br>80<br>70<br>60<br>50<br>40<br>30<br>20<br>10 GPS_GLONASS<br>SDARS(XM)<br>0<br>1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (MHz)<br>(%)<br>**----- End of picture text -----**<br>


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## **3.3 Average Gain** 

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5<br>0<br>-5<br>GPS_GLONASS<br>SDARS(XM)<br>-10<br>1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (MHz)<br>(dB)<br>**----- End of picture text -----**<br>


## **3.4 Peak Gain** 

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10<br>5<br>0<br>GPS_GLONASS<br>SDARS(XM)<br>-5<br>1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (MHz)<br>(dBi)<br>**----- End of picture text -----**<br>


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## **3.5 Axial Ratio (Zenith is at 0 ° )** 

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**----- Start of picture text -----**<br>
20<br>X-Z GPS<br>18 GLONASS<br>SDARS(XM)<br>16<br>14<br>12<br>10<br>8<br>6<br>4<br>2<br>Ki.<br>0<br>0 30 60 90 120 150 180 210 240 270 300 330 00 360 (degree)<br>20<br>Y-Z GPS<br>18 GLONASS<br>SDARS(XM)<br>16<br>14<br>12<br>10<br>8<br>6<br>4<br>2<br>Hie<br>0<br>0 30 60 90 120 150 180 210 240 270 300 330 3600 (degree)<br>(dB)<br>(dB)<br>**----- End of picture text -----**<br>


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## **3.6 Isolation** 

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Isolation<br>0<br>-10<br>-20<br>-30<br>-40<br>-50<br>-60<br>-70<br>0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500(MHz)<br>)<br>dB<br>(<br>**----- End of picture text -----**<br>


## **3.7 XM Gain Requirements (Satellite) – Ground Plane** 

|AUT Location|Elevation<br>Angle(degrees)|Linear Average<br>Gain(dBic)|
|---|---|---|
|Passive Ground Plane|20≤φ≤25|-1.3|
||25≤φ≤30|-0.7|
||30≤φ≤50|0.8|
||50≤φ≤70|2.9|
||70≤φ≤90|3.9|



## **XM Gain Requirements (Terrestrial) – Ground Plane** 

|AUT Location|Elevation<br>Angle(degrees)|Antenna Mean Passive<br>VP Gain Over Solid<br>Angle (dBi)|Antenna P/P Gain<br>variation (dB)|
|---|---|---|---|
|Passive Ground<br>Plane|0°≤φ≤10°|-5.7|-|
||Φ=5°|-|4.3|



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## **4. Antenna Radiation Pattern** 

## **4.1 Measurement Setup** 

The GPSDSF.35.7.A.08 antenna is tested on a 70 x 70mm ground plane in a CTIA certified Anechoic Chamber. The test setup is shown below. 

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## **4.2 2D Radiation Pattern** 

X-Y Plane 

X-Z Plane 

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X 0<br>5<br>330 30<br>-5<br>-15<br>300 60<br>-25<br>-35<br>270 -45 90<br>Y<br>240 120<br>210 150<br>1575.42MHz<br>180 (dBi) 1602MHz<br>Z 0<br>5<br>330 30<br>-5<br>-15<br>300 60<br>-25<br>-35<br>270 -45 90<br>X<br>240 120<br>1575.42MHz<br>210 150<br>1602MHz<br>180 (dBi) 2338.75MHz<br>**----- End of picture text -----**<br>


Y-Z Plane 

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**----- Start of picture text -----**<br>
Z 0<br>5<br>330 30<br>-5<br>-15<br>300 60<br>-25<br>-35<br>270 -45 90<br>Y<br>240 120<br>210 150<br>1575.42MHz<br>180 (dBi) 1602MHz<br>**----- End of picture text -----**<br>


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## **5. 3D Radiation Pattern** 

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## **6. Mechanical Drawing (Unit:mm)** 

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## **7. Feed Pin Pad Layout Recommendation** 

**(unit:mm)** 

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## **8. Evaluation Board - (Unit:mm)** 

## **GPSDSFD.35.7.A.08** 

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## **9. Packaging** 

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Taoglas makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. 

Taoglas reserves the rights to this document and the information contained herein. Reproduction, use or disclosure to third parties without express permission is strictly prohibited. 

Copyright © Taoglas Ltd. 

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