page 1 of 9 sgp.25 c specifcation part no. sgp.1575.25.4.c.02 product name gps smt patch antenna features 25mm*25mm*4.5mm 1575mhz centre frequency patent pending rohs compliant spe-11-8-139/c/ss |
page 2 of 9 this ceramic gps patch antenna is based on smart xtremegain tm technology. it is mounted via smt process and has been selected as optimal solution for the 45x45mm ground plane. 1. introduction 2. specifcation original patch specifcation tested on 45mm ground plane **changes in user groundplane and environment will offset centre frequency parameter specifcation notes range of receiving frequency 1575.42 1.023mhz center frequency 1575.42 3mhz with 45*45mm ground plane bandwidth 8mhz min return loss -10 db vswr 1.5 max center frequency gain at zenith +2.0 dbic typ. center frequency gain at 10elevation -1.0 dbic typ. center frequency axial ratio 3.0 db max center frequency polarization rhcp center frequency impedance 50 ohms center frequency frequency temperature coeffcient ( t f) 0 20ppm / c -40c to +85c operating temperature -40c to +85c spe-11-8-139/c/ss |
page 3 of 9 3. electrical specifcations 3.1 return loss, swr, impedance, measured on the test fxture center 1 575.420 000 mhz span 100.000 000 mhz 1 3 2 2 4 ch1 rfl log 5 db / ref 0 db 1:-15.197 db 1 575.420 000 mhz ch3 rfl 1 u fs 1: 46.533 ? 1.6843 ? 1.6843 nh ch1 markers bw: 10.504643 mhz cent: 1575.615765 mhz q: 149.99 1 loss: -15.197 db ch3 markers 2: 45.992 ? 16.689 ? 1.57561 ghz 3: 41.982 ? 29.475 ? 1.57036 ghz 4: 43.537 ? 30.424 ? 1.58086 ghz * cor cor > > 4 3 1.57542 ghz spe-11-8-139/c/ss |
page 4 of 9 4. mechanical specifcations 4.1 antenna dimensions and drawing note: 1. solder mask. 2. area to be soldered. 3. dimension of 50 ohm cpw dependent on individual board. 4. matching circuit-capacitor and inductor values dependent on individual environment 5. must be soldered to complete antenna feed connection name part no. material finish quantity 1 sgp.25 patch 25x25x4 sgp.25c ceramic clear 1 2 sgp.25 pcb fr 0.5t green 1 spe - 11 - 8 - 138/b/ss page 4 of 8 4.0 mechanical specifications 4.1 antenna dimensions and drawing spe - 11 - 8 - 138/b/ss page 4 of 8 4.0 mechanical specifications 4.1 antenna dimensions and drawing spe-11-8-139/c/ss |
page 5 of 9 4.2 antenna footprint (view from underneath) please note: solder mask has been added to all areas except gold solder areas (green highlighted areas), this will prevent feed points connecting to ground of main pcb. spe-11-8-139/c/ss |
page 6 of 9 4.3 test jig and dimension spe - 11 - 8 - 139/b page 6 of 9 4 .3 test jig and dimension note: 1. solder mask (black) 2. solder area spe - 11 - 8 - 138/b/ss page 6 of 8 4 .3 test jig and dimension spe - 11 - 8 - 138/b/ss page 6 of 8 4 .3 test jig and dimension spe-11-8-139/c/ss |
page 7 of 9 4.4 test fixture set up and measurements spec no. sp03ab15753-0040 issu ed date 2012.02.15 published by version 07 product name sma 1575a page 8/9 ?? ? ???}u?? 17 test fixture antenna setup & measurements calibration point network analyzer s11 characteristics log map smith chart 575a sma adapter ground plane da25 ed63ab00008-027 spec no. sp03ab15753-0040 issu ed date 2012.02.15 published by version 07 product name sma 1575a page 8/9 ?? ? ???}u?? 17 test fixture antenna setup & measurements calibration point network analyzer s11 characteristics log map smith chart 575a sma adapter ground plane da25 ed63ab00008-027 test fixture antenna setup & measurements 45 by 45mm ground plane calibration point patch antenna network analyzer s11 characteristics log map smith chart sma adapter spe-11-8-139/c/ss |
page 8 of 9 5. antenna recommended soldering conditions 5.1 flux, solder 5.2 refow soldering conditions ? use rosin-based fux. dont use highly acidic fux with halide content exceeding 0.2wt%(chlorine conversion value). ? use sn solder. ? pre-heating should be in such a way that the temperature difference between solder and product surface is limited to 150 max. cooling into solvent after soldering also should be in such a way that temperatur e difference is limited to 100 max. unwrought pre-heating may cause cracks on the product, resulting in the deterioration of products quality. temp(c) 240 c 230 c 180 c 0 c 60-120sec 10-30sec time (s) 5 sec (peak 245 c) 5.3 reworking with soldering iron ? the following conditions must be strictly followed when using a soldering ir on. pre-heating 150 , 1 min tip temperature 290 max soldering iron output 30w max soldering time 3 second max spe-11-8-139/c/ss |
page 9 of 9 5. packaging 200 pcs / reel / inner carton 4 reels in an outer carton (800) spec no. sp03ab15753-0040 issu ed date 2012.02.15 published by version 07 product name sma 1575a page 9/9 ?? ? ???}u?? 18 delivery mode spe - 11 - 8 - 139/b page 8 of 9 5.0 packaging 200 pieces/reel/inner car ton, 4 reels in outer carton - (800) spe-11-8-139/c/ss |
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