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| s pe - 11 - 8 - 040/f/wy page 1 of 16 s pecification part no. : gla.01 model : 2.5dbi 1575.42mhz gps loop antenna description : 1575.42mhz features : l=5mm*w=3mm*h=0.5mm low profile smt antenna high performance loop antenna rohs compliant antenna
s pe - 11 - 8 - 040/f/wy page 2 of 16 1. introdu ction taoglas ha s developed a unique ceramic miniature loop antenna series for gps applications. at 5.0*3.0*0.5mm, the gla.01 gps loop antenna is a miniature edge mounted antenna designed for small space requirements. the radiation pattern is more omni - d irectional 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 p eak 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 b oard . i t 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. applications *navigation or position tracking systems *hand - held devices when gps function is needed, e.g., smart phone. pda s pe - 11 - 8 - 040/f/wy page 3 of 16 2. key performance indicators the antenna perform ance was measured with the g la.0 1 mounted on an evaluation board (80*40mm ground plane with sma female connector ) no parameter specification * 1 center frequency 1575.4 2 mhz ** 2 dimensions 5.0 * 3 . 0 * 0.5 mm 3 vswr 2 max 4 polarization linear 5 bandwidth 50 mhz min. 6 gain peak 2.5 dbi typ. 7 efficiency 8 4 % typ. 8 impedance 50 ? mechanical 9 dimensions 5*3*0.5mm 10 material ceramic environmental 11 operating temperature - 40 c ? +85 c 12 storage temperat ure - 40 c ? +10 5c 13 temperature coefficient f 0 ? 20 ppm @ - 20oc to +80oc 14 recommended reel storage condition 5c to 40c relative humidity 20% to 70% * the data was measured by a ctia authorized test lab. ** working frequency will be offset to an other frequency according to the conditions of users ground plane and radome. s pe - 11 - 8 - 040/f/wy page 4 of 16 3. electrical characteristics (80 *40mm ground plane) 3 .1 return loss (s11) s pe - 11 - 8 - 040/f/wy page 5 of 16 3 .2 impedance (smith chart) s pe - 11 - 8 - 040/f/wy page 6 of 16 4 . r adiation pattern (customize design) s pe - 11 - 8 - 040/f/wy page 7 of 16 4 .2 3d gain pattern @1575 mhz 4 .1 radiation pattern (80x40(mm)ground plane) x y s pe - 11 - 8 - 040/f/wy page 8 of 16 y x z y s pe - 11 - 8 - 040/f/wy page 9 of 16 4 .3 efficiency table 4.4 efficiency vs. frequency s pe - 11 - 8 - 040/f/wy page 10 of 16 5 . layout guide 5 .1 solder land pattern the l and pattern for soldering ( grey marked areas) is as show n below. a matching circuit similar to the one shown in section 5 .3 is also required . s pe - 11 - 8 - 040/f/wy page 11 of 16 5 .2 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. 5 .3 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 c ase 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 t he ability to solder down a coax pigtail to make measurements with a vector network analyzer. s pe - 11 - 8 - 040/f/wy page 12 of 16 6 . antenna drawings 6.1 antenna main body s pe - 11 - 8 - 040/f/wy page 13 of 16 6.2 antenna with evb s pe - 11 - 8 - 040/f/wy page 14 of 16 6.3 footprint on evb s pe - 11 - 8 - 040/f/wy page 15 of 16 7 . p ack aging (1) quantity/reel: 6 000pcs/reel (2) plastic tape 7 .2 pocket dimensions (unit: mm) feature specifications tolerances ao 3. 25 0. 2 0 0.10 bo 5.25 ko 0.90 0.10 t 0.3 0 0.05 7.1 tape dimensions (unit: mm) 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. 2 0 + 0.10 - 0.00 po 4 .00 0. 1 0 10po 40.00 0. 2 0 10po 40 .00 0.20 s pe - 11 - 8 - 040/f/wy page 16 of 16 8. recommended reflow profile |
Price & Availability of GLA01
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