SDDCP.5900.25.10.A.08

## **Specification** 

Part No. : **SDDCP.5900.25.10.A.08** 

Product Name : Embedded 25*25*10.15mm Stacked SDARS & DSRC Patch Antenna for OEM Automotive Applications Feature : High Efficiency and Gain SDARS: LHCP 80.3% Efficiency, +5.4 dBi Gain @2332.5 MHz 

DSRC: RHCP 68.5% Efficiency, +3.5dBi Gain 

@5900 MHz 

Dual Feed Patch Assembly 

Tuned for Centre Positioning on 70*70mm Ground Plane Through–Hole Mounting Pin Type IATF 16949 

RoHS Compliant 

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## **1. Introduction** 

The SDDCP.5900.25.10.A.08 is a passive embedded ceramic stacked patch antenna with both SDARS and DSRC capabilities. Using a stacked dual patch assembly for both bands results in the most economical and space-efficient solution for demanding applications requiring both SDARS and DSRC. The patch assembly is easy to integrate with an overall footprint size of just 25x25mm and sits at 10.15mm in height. 

The SDARS patch at 25mm*25mm is designed for use with Satellite Digital Audio Radio Services (SDARS). It features left-hand circular polarization, low in-band axial ratio, and excellent gain characteristics in the 2320 to 2345 MHz band, making it compatible with the most popular satellite radio services available in many new vehicles. It is extremely efficient with up to 80% efficiency at 2332.5MHz. 

The DSRC patch at 12mm*12mm is used as the communications medium of choice for active safety V2V/V2X (Vehicle-to-Vehicle and Vehicle-to-Other) systems. Primarily allocated for vehicle safety applications, DSRC supports high-speed, lowlatency, short-range, V2V/V2X wireless communications. The DSRC patch also has left hand circular polarization and nearly 70% efficiency at 5900MHz. 

A typical use case would include utilizing the stacked patch in shark fin style external automotive roof mounted antennas. 

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. Note that certification of your device and/or the antenna may be required by certain Satellite Radio providers. Further engineering may be needed to meet their requirements. Contact your regional Taoglas sales office for support. 

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## **2.Specification** 

|Electrical<br>~~LT~~|Electrical<br>~~LT~~|
|---|---|
|Frequency<br>~~LT~~|SDARS: 2320 ~ 2345 MHz<br>DSRC : 5850~5925 MHz<br>~~LT~~|
|Centre Frequency|SDARS: 2332.5 ± 3 MHz<br>DSRC : 5887.5±3 MHz|
|Return Loss|SDARS: -10dB max.<br>DSRC:-10dB max.|
|Zenith Gain|SDARS: +5.4 dBi typ.<br>DSRC: +3.5 dBi typ.|
|Efficiency|SDARS: 80.3 %<br>DSRC: 68.5 %|
|Axial Ratio|SDARS: 18.4 dB typ.<br>DSRC: 14.4 dB typ.|
|Polarization|L.H.C.P. For SDARS<br>R.H.C.P. For DSRC|
|Impedance|50|
|Mechanical<br>~~Po~~||
|Dimensions<br>~~Po~~|25 x 25 x 10.15mm<br>SDARS: 25 x 25 x 6 mm<br>DSRC: 12 x 12 x 4 mm<br>~~Po~~|
|Material|Ceramic|
|Pin Diameter|0.8mm|
|Pin Length|2.0mm|
|Weight|13.9g|
|Environmental<br>~~LT~~||
|Operation Temperature|-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>-25<br>-30<br>-35<br>-40<br>SDARS<br>-45<br>DSRC<br>-50<br>2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 (MHz)<br>(dB)<br>**----- End of picture text -----**<br>


## **3.2 Efficiency** 

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**----- Start of picture text -----**<br>
100<br>90<br>80<br>70<br>60<br>50<br>40<br>30<br>20<br>SDARS<br>10<br>DSRC<br>0<br>2000 2500 3000 3500 4000 4500 5000 5500 6000 6500(MHz)<br>(%)<br>**----- End of picture text -----**<br>


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## **3.3 Average Gain** 

## **3.4 Peak Gain** 

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**----- Start of picture text -----**<br>
10<br>5 J<br>WN<br>0<br>_ SDARSDSRC<br>-5<br>2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 (MHz)<br>(dBi)<br>**----- End of picture text -----**<br>


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**==> picture [423 x 654] intentionally omitted <==**

**----- Start of picture text -----**<br>
3.5 Axial Ratio (Zenith is at 0 ° )<br>X-Z<br>20<br>18<br>16<br>14<br>12<br>10<br>8<br>6<br>4<br>2332.5MHz<br>2<br>ry TAOG<br>5900MHz<br>0<br>0 30 60 90 120 150 180 210 240 270 300 330 3600 (degree)<br>Y-Z<br>20<br>18<br>16<br>14<br>12<br>10<br>8<br>6<br>4<br>2332.5MHz<br>2<br>5900MHz<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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**----- Start of picture text -----**<br>
Isolation<br>0<br>-10<br>-20<br>-30<br>-40<br>-50<br>0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 (MHz)<br>(dB)<br>**----- End of picture text -----**<br>


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

|AUT Location|Elevation Angle(degrees)|Linear Average Gain(dBic)|
|---|---|---|
|Passive Ground Plane|20≤φ≤25|-1.1|
||25≤φ≤30|-0.5|
||30≤φ≤50|1.1|
||50≤φ≤70|3.2|
||70≤φ≤90|4.2|



## **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°|-7.0|-|
||Φ=5°|-|6.1|



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## **4. Antenna Radiation Pattern** 

## **4.1 Measurement Setup** 

The SDDCP.5900.25.10.A.08 antenna is tested with 70X70mm 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** 

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**----- Start of picture text -----**<br>
X<br>0<br>0 5 0<br>0 0<br>-5<br>0 0<br>-15<br>0 0<br>-25<br>0 0<br>-35<br>0 -45 0 Y<br>0 0<br>0 0<br>0 0<br>0 0 2332.5(MHz)<br>0 0 (dBi)<br>0 5900(MHz)<br>**----- End of picture text -----**<br>


## **X-Z Plane** 

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**----- Start of picture text -----**<br>
Z<br>0<br>0 10 0<br>0 0<br>0<br>0 0<br>-10<br>0 0<br>-20<br>0 0<br>-30<br>0 -40 0 X<br>0 0<br>0 0<br>0 0<br>0 0<br>0 0 2332.5(MHz)<br>0 (dBi) 5900(MHz)<br>**----- End of picture text -----**<br>


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## **Y-Z Plane** 

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**----- Start of picture text -----**<br>
Z<br>0<br>0 10 0<br>0 0<br>0 LYWaa 0 N\\ 0<br>y -10 , \<br>0 y yy, \ N \ 0<br>-20<br>0 0<br>-30<br>0 -40 0 Y<br>0 0<br>\ x —$— L /<br>0 \\\<»ZSLS/ J“/ 0<br>\~~ A /<br>0 0<br>NY . -H———_| yYo<br>0 0<br>am==D> 2332.5(MHz)<br>0 0 0 (dBi) am==D 5900(MHz)<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. Recommended Pin Feed Pad Layout** 

## **(Unit:mm)** 

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

## **SDCPD.5900.25.10.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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