GLA.02

Specification Part No. : GLA.02 Model : 3dbi 1575Hz GPS Loop Antenna Description : 1575.42MHz Features : 10*3.2*3.9mm SMT Process Compatible RoHS  GLA.02 Antenna GLAD.02 EVB SPE-12-8-042/C/SS Page 1 of 17 1. Introduction Taoglas have developed a unique ceramic miniature loop antenna series for GPS applications. At 10*3.2*3.9mm, the GLA.02 GPS 1575MHz 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 MHz antennas. Efficiencies of 40% to 90% are achievable. Peak gain of 1dBi places this antenna gain performance within the range of a much larger 15mm to 18mm patch antenna. Mechanically, this antenna does not need ground removed on the back-side of the PCB thus allowing other components to be placed there on crowded boards. Based on the loop effect this antenna works best when placed on the centre of the edge of the board, but can still work better than traditional linear polarized chip antennas even when placed at corners as substitute. The GLA.02 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. Applications *navigation or position tracking systems *Hand-held devices when GPS function is needed, e.g., Smart phone. PDA, PND SPE-12-8-042/C/SS Page 2 of 17 2. Key Performance Indicators The antenna performance was measured with the GLA.02 mounted on an evaluation board (80*40mm ground plane) with SMA(F) connector. No Parameter Specification 1 Center Frequency 1575.422MHz 2 Dimensions 10*3.2*3.9mm 3 VSWR 2 max (depends on the special environment) 4 Polarization Linear 5 Bandwidth 81MHz Min.(under -10dB return Loss) 6 Gain Peak 3dBi typ. 7 Efficiency 83% typ. 8 Impedance 50  9 Operating Temperature -40°C+85°C Temperature Coefficient 10 （τf） 0  20 ppm @-20ºC to +80ºC * Center frequency will be offset to working frequency according to the conditions of user’s Ground plane and radome. **The data was measured by A Test Lab Techno Corp. (CTIA Authorized Test Lab). SPE-12-8-042/C/SS Page 3 of 17 3. Electrical Characteristics (80*40mm ground plane) 3.1 Return Loss (S11) SPE-12-8-042/C/SS Page 4 of 17 3.2 Impedance (Smith Chart) SPE-12-8-042/C/SS Page 5 of 17 4. Radiation Pattern (Customize Design) SPE-12-8-042/C/SS Page 6 of 17 4.1 3D Radiation Pattern SPE-12-8-042/C/SS Page 7 of 17 4.2 Efficiency Table SPE-12-8-042/C/SS Page 8 of 17 4.3 Efficiency vs. Frequency SPE-12-8-042/C/SS Page 9 of 17 5. Antenna Drawings 5.1 Antenna Main Body Note: Silver Area 5.2 Footprint 5.2.1 Footprint Copper Keepout Area Note: All pads should be connected to GND Pad 2 should be connected to a 50ohm transmission line SPE-12-8-042/C/SS Page 10 of 17 5.2.2 Solder Paste Area 5.2.3 Solder Mask (Negative) Note: Black regions are anti-mask SPE-12-8-042/C/SS Page 11 of 17 5.2.4 Footprint Composite SPE-12-8-042/C/SS Page 12 of 17 5.3 Antenna with EVB SPE-12-8-042/C/SS Page 13 of 17 6. Layout Guide 6.1 Solder Land pattern Land pattern for soldering (grey marked areas) is as shown below. Depending on Customers requirement, matching circuit as shown below is also recommended. The footprint is 12*5.6mm, this antenna does not need ground removed on the back-side of the PCB thus allowing other components to be placed there on crowded boards. 6.2 Matching Circuit The most common matching arrangement is the pi matching as shown below. SPE-12-8-042/C/SS Page 14 of 17 6.3 Fine Tuning Element vs. Centre Frequency SPE-12-8-042/C/SS Page 15 of 17 7. Packing (1) Quantity/Reel: 2000pcs/Reel (2) Plastic Tape 7.1 Tape Dimensions (unit: mm) Feature Specifications Tolerances W 24 ±0.30 P 8 ±0.10 E 1.75 ±0.10 F 11.50 ±0.10 P2 2 ±0.10 D 1.50 ±0.10 Po 4 ±0.10 10Po 40 ±0.20 7.2 Pocket Dimensions (unit: mm) Feature Specifications Tolerances Ao 3.4 ±0.10 Bo 10.30 ±0.10 Ko 4.25 ±0.10 t 0.35 ±0.05 SPE-12-8-042/C/SS Page 16 of 17 8. Recommended Reflow Soldering Profile SPE-12-8-042/C/SS Page 17 of 17