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| s pe - 12 - 8 - 098/d /a s page 1 of 13 specification part no. : gp.15 75 . 3 5 .3 .a .02 specification n o : gp.35 a product name : 3.5 mm thick gps patch antenna , 1575 mhz features : 3 5 m m* 3 5 mm* 3.5 mm rohs compliant :
s pe - 12 - 8 - 098/d /a s page 2 of 13 1. introduction this 35*35mm ceramic gps patch antenna is based on smart xtremegain? technology. it is mounted via pin and double - sided adhesive and has been tuned as the optimal solution for the customer device environment. 2. key antenna performance indicators original patch specification tested on 5 0 *50 mm ground plane no parameter specification 1 center frequency 1575mhz 6mhz 2 bandwidth 22mhz min 3 vswr 1.5 max 4 gain at zenith 2.0 dbic typ. 5 gain at 10elevation 1.5dbic typ. 6 axial ratio 3 db max 7 polarization rhcp 8 impedance 50 ohms 9 frequency temperature coefficient f 0 20ppm / o c 10 operating temperature - 40c to +8 5c s pe - 12 - 8 - 098/d /a s page 3 of 13 3. test set up figure 1 . return loss measurement. figure 2 . peak gain, average gain, efficiency and radiation pattern measurements. z y x s pe - 12 - 8 - 098/d /a s page 4 of 13 4. antenna parameters 4.1 . return loss f igure 3 . return loss of the gp.1575.35.a.02 4.2. vswr figure 4. vswr of the gp.1575.35.a.02 s pe - 12 - 8 - 098/d /a s page 5 of 13 4.3 . efficiency f igure 5 . efficiency of the gp.1575.35.a.02 4 .4 . peak gain f igure 6 . peak gain of the gp.1575.35.a.02 . s pe - 12 - 8 - 098/d /a s page 6 of 13 5. 2d radiation 5.1 xz plane radiation s pe - 12 - 8 - 098/d /a s page 7 of 13 5.2 yz plane radiation s pe - 12 - 8 - 098/d /a s page 8 of 13 5.3 axial ratio s pe - 12 - 8 - 098/d /a s page 9 of 13 5.4 3d radiation f igure 7 . radiation pattern of the gp.1575.35.a.02 at 1575mhz . s pe - 12 - 8 - 098/d /a s page 10 of 13 6 . mechanical drawing s pe - 12 - 8 - 098/d /a s page 11 of 13 6.1 adhesive thickness 6.2 layout dimensions s pe - 12 - 8 - 098/d /a s page 12 of 13 6.3 test fixture antenna setup and measurements s pe - 12 - 8 - 098/d /a s page 13 of 13 7 . pack ag ing |
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