ALA.01.07.0095A

## **SPECIFICATION** 

Part No. : **ALA.01.07.0095A** 

- Product Name : 1575MHz GPS-GALILEO Ceramic Active Loop Module 

Features : 16dB One Stage GPS/GALILEO PCB Dims: 45*10*2.3mmmm RoHS Compliant 

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## **1. Introduction** 

The active loop antenna ALA.01 is best suited for applications where omni-directionality is important. The average gain is similar to an 18mm active patch antenna but in a much narrower profile, only 2.3mm at its highest point, allowing this antenna to be used perpendicular to the device main-board, or placed adjacent to the top or bottom of device main board. A one stage LNA combined with a SAW filter boosts the S/N (C/N) of the GPS/GALILEO system and helps to overcome some noise effects from today’s crowded device boards that passive antennas cannot resolve. 

The antenna can be placed in a plastic slot in the device housing. Alternatively, adhesive foam, hot-melt, or non-conductive screws could be used to mount the antenna. The core antenna design principle of loop current flow tends to “lock-out” a lot of surface noise from close circuitry from entering the antenna. 

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## **2. Specification** 

|ELECTRICAL<br>~~Ee~~|ELECTRICAL<br>~~Ee~~|
|---|---|
|Frequency|1575.42 ± 1.023MHz|
|Bandwidth (10dB return loss)|70MHz typical|
|Peak Gain|Typ. 3.1dBi|
|Avg. Gain|-2.2dBI|
|Polarization|Linear|
|VSWR|2 max (depends on the special environment)|
|Dimension|5*3*0.5mm|
|Gain (with LNA)|16 ± 4dB @ 90o|
|Output Impedance|50Ω|
|Polarization|Linear|
|Input Voltage|Min. 2.6V,  Typ. 3.0V,  Max. 5.0V|
|LNA<br>~~—=x<&;<—>—X_——*K<&z«e—Es~~||
|Frequency|1575.42 ± 1.023MHz|
|Gain|Typ. 16dB @ 3V<br>Typ. 17.8dB @ 5V|
|Noise Figure|Typ. 1.3dB @ 3V|
|Filter (out of band attenuation)|Saw Filter (fo=1575.42MHz)<br>40dB typ. fo±50MHz<br>45dB min. fo±100Mhz|
|Output VSWR|< 2.0|
|Input Voltage|DC = 2.6~5.0V|
|Current|DC = 13mA at 3.0V|



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|RF Cable|MECHANICAL<br>955mm 1.13 Coaxial Cable|
|---|---|
|Connector|IPEX MHF(U.FL)|
|Dimensions|45*10*2.3mm|
|Weight|1.35±0.5g (typical)|
||ENVIRONMENTAL|
|Operation Temperature|-40**°**C to + 85**°**C|
|Storage Temperature|-40**°**C to + 90**°**C|
|Humidity|10 to 95%|



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## **3. Performance Measurement** 

## **3.1. Block Diagram** 

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## **4. Measurement Method** 

## **4.1. Chip** 

## a) Reflection Co-efficient Measurement 

- a. Equipment: Network Analyzer (Aglient E5071A)(Fig.1) 

b. Item S11 Log Chart(Return Loss) S11 Smith Chart (impedance) 

Figure 1. Network Analyzer 

## a) Pattern Measurement 

- a. Equipment: Anechoic Chamber (Fig. 2), Network Analyzer (Aglient E8753ES) 

- b.Item: Gain Pattern, Axial ratio 

Figure 2. Quiet Room 

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Figure 3. Schematic of measurement set-up 

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## **4.2. LNA** 

## a) Parameter Measurement 

- a. Equipment: Network Analyzer (Aglient E5071B)(Fig.4) 

- b. S11, S12, S21, S22 

Figure 4. Network Analyzer 

## a) Noise Figure Measurement 

- a. Equipment: Noise Meter (Aglient E4407B)(Fig.5) 

- b. Environment: Shielding Room (Fig. 6) 

- c. Item: N.F (Noise Figure) 

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## **5. Measured Values** 

## **5.1. Chip** 

## 5.1.1. S11 Smith Chart (Impedance) 

## 5.1.2. S11 Log Chart (Return Loss): Bandwidth S11 <-10dB 

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## 5.1.3. S11 VSR 

## 5.1.4. Radiation Patterns (Excluding LNA) 

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|Plane<br>~~rr~~|XZ<br>~~rr~~|YZ<br>~~ee~~|XY<br>~~eee~~|
|---|---|---|---|
|Average Gain<br>~~rr~~|-1.62<br>~~rr~~|-1.57<br>~~ee~~|-3.44<br>~~eee~~|
|Peak Gain|4.92|1.89|2.75|



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## **5.2. Low Noise Amplifier (LNA)** 

- 5.2.1. S11 (network analyzer input power -40dB) 

- 5.2.2. S12 (network analyzer input power -40dB) 

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## 5.2.3. S21 (Gain) (network analyzer input power -40dB) 

## 5.2.4. 22 (Gain) (network analyzer input power -40dB) 

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## **5.3. Noise Figure** 

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## **6. Drawing** 

|1|Chip Antenna: 5*3*0.5mm|
|---|---|
|2|Cable Ø1.13 L=95±5mm|
|3|IPEX MHFI(U.FL)|
|4|Shielding Case|
|5|PCB|



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Reproduction, use or disclosure to third parties without express permission is strictly prohibited. 

Copyright © Taoglas Ltd. 

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