GLA.01.A

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|1.|Introduction|3|
|---|---|---|
|2.|Specifications|4|
|3.|Antenna Characteristics|5|
|4.|Radiation Patterns|7|
|5.|Mechanical Drawing – Antenna|10|
|6.|Antenna Integration Guide|12|
|7.|Mechanical Drawing – Evaluation Board|19|
|8.|Soldering Conditions|21|
|9.|Packaging|22|
||Changelog|23|



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

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## 1. Introduction 

Taoglas has developed a unique ceramic miniature loop antenna series for GPS/GALILEO applications. At 5.0*3.0*0.5mm, the GLA.01 GPS/GALILEO Loop antenna is a miniature edge mounted antenna designed for small space requirements. The radiation pattern is more omni-directional than traditional patch antennas. The GLA loop antenna series show at least three times the efficiency of traditional linear polarized 1575.42MHz MHz antennas. Efficiencies of 40% to 90% are achievable. A peak gain of 2.5dBi places this antenna's gain performance within the range of a much larger 15mm to 18mm patch antenna. 

Mechanically, the GLA.01 at only 0.5mm in height has a very low profile, and with a footprint of 6.0 x 5.5mm needs less space on the board. It does require clearance of 6.0 x 5.5mm. Based on the loop effect, this antenna works best when placed on the center of the edge of the board, but can still work better than traditional linear polarized chip antennas even when placed at corners as a substitute. 

The GLA.01 is delivered on tape and reel and now allows M2M customers to use an omni-directional antenna in devices where orientation of the product is unknown. 

This antenna can be mounted with no performance degradation in either orientation as long as the antenna is soldered correctly via Surface mounting. Please see the integration instructions section for further detail regarding the optimum way to integrate this antenna into your device. 

For further optimization to customer-specific device environments and for support to integrate and test this antennas performance in your device, contact your regional Taoglas Customer Services Team. 

## Applications: 

Navigation or position tracking systems Hand-held devices when GPS/GALILEO function is needed, e.g., smart phone. PDA 

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## **2.** Specifications 

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|**Antenna**|**Antenna**|
|---|---|
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|Frequency (MHz)|1575.42MHz*|
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|Efficiency (%)||
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|80 x 40 mm Ground Plane|84% (Tyo.)|
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|Peak Gain (dBi)||
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|80 x 40 mm Ground Plane|2.5 dBi (Typ.)|
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|VSWR|2 max|
|Impedance (Ω)|50Ω|
|Polarization|Linear|
|Bandwidth|50MHz min.|
|**Mechanical**||
|Dimensions (mm)|5.0 x 3.0 x 2.5|
|Material|Ceramic|
|Tested Ground Plane (mm)|80 x 40|
|**Environmental**||
|Temperature Range|-40°C to 85°C|
|Storage Temperature|-40°C to 105°C|
|Temperature Coefficient`（`τf`)`|020 ppm @-20ºC to +80ºC|
|Recommended Reel Storage<br>Condition|5°C to 40°C<br>Relative Humidity 20% to 70%|
|Moisture Sensitivity Level|3 (168 Hours)|



The data was measured by A CTIA Authorized Test Lab. 

* Working frequency will be offset to another frequency according to the conditions of user’s ground plane and radome. 

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## **3.** Antenna Characteristics 

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3.1 Return Loss<br>**----- End of picture text -----**<br>


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-10.000 dB<br>**----- End of picture text -----**<br>


## **3.2** Impedance (Smith Chart) 

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1.5754200 GHz—-63.104 Q<br>**----- End of picture text -----**<br>


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**3.3** Efficiency Table 

## **3.4** Efficiency vs. Frequency 

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## **4.** Radiation Patterns 

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4.1 Test Setup – Antenna on Evaluation Board<br>**----- End of picture text -----**<br>


## **4.2** Radiation Pattern (80X40(mm)ground plane) 

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## **4.3** 3D Radiation Pattern 

## 1575 MHz 

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## **5.** Mechanical Drawing – Antenna 

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5.1 Antenna Dimension and Drawing<br>**----- End of picture text -----**<br>


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Unit: mm<br>**----- End of picture text -----**<br>


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5.2 Antenna Footprint<br>**----- End of picture text -----**<br>


*Taoglas is able to provide CAD drawing file to customers for evaluation. 

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## **5.2** Matching Circuit 

Like all antennas, surrounding components, enclosures, and changes to the GND plane dimensions can alter performance. A pi-matching network like the one shown below is required in case adjustments need to be made. The antenna EVB has a similar matching network. The components on the EVB are a good starting point for a new design, but will need to be adjusted upon integration for best performance. The zero ohm resistor is needed for the ability to solder down a coax pigtail to make measurements with a vector network analyzer. 

## **5.3** Fine Tuning Element vs. Centre Frequency 

This antenna includes a fine tuning element (as shown in the land patterns above) that can be used to slightly shift antenna resonance. 

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## **6.** Antenna Intergration Guide 

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## **6.1** Schematic Symbol and Pin Definition | ff 

The circuit symbol for the antenna is shown below. The antenna has 3 pins with all three pins as functional. 

|**Pin**<br>~~ee~~|**Description**<br>~~ee~~|
|---|---|
|1|RF Feed|
|2|Ground|
|3|FTE|



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## **6.2** Antenna Integration | ff 

For any given PCB size, the antenna should ideally be placed on the PCB’s longest side, to take advantage of the ground plane. Optimized matching components can be placed as shown. 

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o° oc oie©e9000000 ANT13°<br>**----- End of picture text -----**<br>


Top Side w/ Solder Mask 

Top Side w/o Solder Mask 

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**6.3** PCB Layout 

The footprint and clearance on the PCB must meet the layout drawing in (Footprint Drawing). Note the placement of the optimized components. R1 is placed as close as possible to the RF feed (pad 1) but still within the transmission line. C3 is then placed tightly in parallel after that. C2 is placed as close as possible to the Tuning feed (pad 3). C1 is an optional component but the footprint is recommended in case it is needed. 

. 

Topside 

Bottom Side 

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## **6.4** PCB Clearance 

Below shows the antenna footprint and clearance through ALL layers on the PCB. Only the antenna pads and connections to feed and GND are present within this clearance area (marked RED). The clearance area extends to 5.5mm in length & 7.1mm in width from the top center of the PCB. This clearance area includes the bottom side and ALL internal layers on the PCB. 

Topside 

Bottom Side 

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## **6.5** Evaluation Board 

## Topside 

Bottom Side 

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## **6.6** Evaluation Board Matching Circuit 

A matching component (R1) in series with the GLA.01 is required for the antenna to have optimal performance on the evaluation board, located outside of the ground plane in the space specified in the above images. Additional matching components may be necessary for your device, so we recommend incorporating extra component footprints, forming a “pi” network, between the cellular module and the edge of the ground plane. 

|**Designator**|**Type**|**Value**|**Manufacturer**|**Manufacturer Part Number**|
|---|---|---|---|---|
|R1|Resistor|0 Ohms|Yageo|RC0402JR-070RL|
|C1|Capacitor|Not Fitted|-|-|
|C2|Capacitor|8pF|Murata|GRM1555D1H8R0DA01D|
|C3|Capacitor|2.2pF|Murata|GRM1555C1H2R2CA01D|



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## **7.** Mechanical Drawing – Evaluation Board 

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7.1 Antenna with EVB<br>**----- End of picture text -----**<br>


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## **7.2** Footprint on EVB 2 

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## **8.** Soldering Conditions 

The GLA.01 can be assembled by following the recommended soldering temperatures are as follows: 

*Temperatures listed within a tolerance of +/- 10º C 

Smaller components are typically mounted on the first pass, however, we do advise mounting the GLA.01 when placing larger components on the board during subsequent reflows. 

Note: Soldering flux classified ROL0 under IPC J-STD-004 is recommended. 

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## **9.** Packaging 

## (1) Quantity/Reel: 6000pcs/Reel 

## (2) Plastic Tape 

|Feature|Specifications|Tolerances|
|---|---|---|
|W|12.00|±0.30|
|P|8.00|±0.10|
|E|1.75|±0.10|
|F|5.50|±0.10|
|P2|2.00|±0.10|
|D|1.20|+0.10<br>-0.00|
|Po|4.00|±0.10|
|10Po|40.00|±0.20|



|Feature|Specifications|Tolerances|
|---|---|---|
|Ao|3.25|±0.20<br>±0.10|
|Bo|5.25||
|Ko|0.90|±0.10|
|t|0.30|±0.05|



2. Carrer camber not to exceed 1mm in 250mm 

5. All dimensions meet EIA-481-6 requirements. 

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Changelog for the datasheet<br>SPE-11-8-040 – GLA.01<br>Revision: J (Current Version)<br>Date: 2023-05-09<br>Changes: Updated Solder Reflow Information<br>Changes Made by: Cesar Sousa<br>Previous Revisions<br>Revision: I  Revision: D<br>Date: 2023-02-28  Date: 2013-07-18<br>Changes: Antenna Integration Guide Added  Changes:<br>Changes Made by: Cesar Sousa  Changes Made by: STAFF<br>Revision: H  Revision: C<br>Date: 2021-11-1  Date: 2021-04-25<br>Changes: Format Change, MSL  Changes:<br>Changes Made by: Erik Landi  Changes Made by: STAFF<br>Revision: G Revision: B<br>Date: Date: 2011-07-18<br>Changes: No info  Changes:<br>Changes Made by: STAFF  Changes Made by: STAFF<br>Revision: F Revision: A (Original First Release)<br>Date: 2014-04-14  Date: 2009-09-25<br>Changes: Updated by Wayne/Eddy  Notes:  Initial Release<br>Changes Made by: Aine Doyle  Author: STAFF<br>Revision: E<br>Date: 2021-07-25<br>Changes: added Note on Page 14 under close up image<br>Changes Made by: Aine Doyle<br>**----- End of picture text -----**<br>


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