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  page 1 of 9 sgp.18 c specifcation part no. sgp.1575.18.4.c.02 product name gps smt patch antenna features 18mm*18mm*4.5mm 1575mhz centre frequency patent pending rohs compliant spe-11-8-138/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 5mhz min return loss -10 db vswr 1.5 max gain at zenith +1.0 dbic typ. gain at 10elevation -3.0 dbic typ. axial ratio 4.0 db max polarization rhcp impedance 50 ohms frequency temperature coeffcient ( t f) 0 20ppm / c -40c to +85c operating temperature -40c to +85c spe-11-8-138/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 150.000 000 mhz 1 1.57542 ghz 3 2 1 2 2 4 ch1 rfl log 5 db / ref 0 db 1:-33.956 db 1 575.420 000 mhz ch3 rfl 1 u fs 1: 50.955 ? -1.7813 ? 56.715 pf ch1 markers bw: 37.849847 mhz cent: 1575.957976 mhz q: 41.637 1 loss: -33.956 db ch3 markers 2: 50.709 ? 0.2559 ? 1.57595 ghz 3: 8.6030 ? 3.7617 ? 1.55703 ghz 4: 25.313 ? -66.926 ? 1.59488 ghz * cor cor > > 4 3 spe-11-8-138/c/ss |
page 4 of 9 4. mechanical specifcations 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 note: matching circuit-capacitor and inductor name part no. material finish quantity sgp.18 patch 18x18x4 sgp.18c sgp.18 pcb 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-11-8-138/c/ss |
page 5 of 9 4.2 antenna footprint (view from underneath) spe - 11 - 8 - 138/b/ss page 5 of 8 4.2 antenna footprint (view from underneath) spe-11-8-138/c/ss |
page 6 of 9 4.3 test jig and dimension spe - 11 - 8 - 138/b/ss page 6 of 8 4 .3 test jig and dimension note: pppem name p/n material finish qty 08opp8o8o1 08o 1p empp 0000070 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-11-8-138/c/ss |
page 7 of 9 4.4 test fixture set up and measurements spe - 11 - 8 - 138/b/ss page 7 of 8 4 .4 test fixture set up and mea surements spe - 11 - 8 - 138/b/ss page 7 of 8 4 .4 test fixture set up and mea surements 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-11-8-138/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-11-8-138/c/ss |
page 9 of 9 5. packaging spe - 11 - 8 - 138/b/ss page 8 of 8 5.0 packaging 200pcs/reel/inner carton 5 reels in an outer carton(1000) 200 pcs / reel / inner carton 5 reels in an outer carton (1000) spe-11-8-138/c/ss |


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