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spe - 12 - 8 - 042/a /ss page 1 of 11 s pecification part no. : g la.02 model : 1.34dbi 1575 hz gps loop antenna description : 1575.42mhz features : 10 * 3.2 * 3.9 mm smt process compatible rohs ? gla.02 antenna glad.02 evb
spe - 12 - 8 - 042/a /ss page 2 of 11 i. introduction taoglas have developed a unique ceramic miniat ure loop antenna series for gps applications. at 10*3.2*3.9 mm, 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. t he 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 wh en gps function is needed, e.g., smart phone. pda, pnd
spe - 12 - 8 - 042/a /ss page 3 of 11 ii. key performance indicators the antenna perform ance was measured with the g la. 02 mounted on an evaluation board (80*40mm ground plane) with sma (f) connector. no parameter specification 1 center frequency 1575.42 ? ? ? f ? center frequency will be offset to working frequency according to the conditions of users ground plane and radome. **the data was measured by a test lab techno corp. (ctia authorized test lab).
spe - 12 - 8 - 042/a /ss page 4 of 11 iii. antenna dimensions (unit: mm) iii.i test board (unit:mm)
spe - 12 - 8 - 042/a /ss page 5 of 11 iv. electrical characteristics (80 *40mm ground plane) iv.1 return loss (s11)
spe - 12 - 8 - 042/a /ss page 6 of 11 iv.2 impedance (s mith chart )
spe - 12 - 8 - 042/a /ss page 7 of 11 v. radiation pattern (customize design)
spe - 12 - 8 - 042/a /ss page 8 of 11 v.2 total gain plane xz yz xy peak gain 1.27 1.34 0.38 average gain - 4.31 - 1.3 - 5.72 v.1 radiation pattern ppd - vertical polarization xpd - horizontal polarization
spe - 12 - 8 - 042/a /ss page 9 of 11 vi. layout guide vi .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 11*5.7mm, 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. vi.2 matching circuit the most common matching arrangement is the pi matching as shown below. we have 2.2pf capacitor for component 3 and 0ohm resister for component 2 on evb. 5.1 3d gain pattern
spe - 12 - 8 - 042/a /ss page 10 of 11 vi. 3 re c ommended reflow profile
spe - 12 - 8 - 042/a /ss page 11 of 11 vii. packing (1) quantity/reel: 2 000pcs/reel (2) plastic tape 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 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 1.5 0 0.10 po 4 0.10 10po 40 0.20

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