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spe - 18 - 8 - 078 - b /t/ah page 1 of 15 s pecification p art no. : g psdsf.35.7.a.08 p roduct name : e mbedded 2in1 low profile stacked patch for g ps/ glonass /galileo & sdars (xm ) f eature : h ighest efficiency and gain g ps : 69.8% efficiency @1575.42 mhz g lonass: 78.6% efficiency @1 60 2 mhz sdars (xm) : 67.6% efficiency @ 2338 .75 mhz a r values : g ps: 5.0 db typ. glonass: 7. 5 db typ. sdars(xm): 3.8 db typ. r hcp on gps and g l onass / lhcp on sdars g round - plane through C hole mounting pin type d ual fee d patch assembly d imensions: 35*35*7.15mm t uned for centre positioning on a 70*70mm r ohs compliant
spe - 18 - 8 - 078 - b /t/ah page 2 of 15 1. introduction t he gpsdsf.35.7.a.08 is a passive 35x35mm ceramic stacked patch antenna with both sdars and gnss capabilities. this patch provides world - class performance for both sdars and gnss services, with ar g p s : 5.0 db typ , glonass : 7. 5 db typ. sdars(xm) : 3.8 db typ right hand circular polarization a nd nearly 70% efficiency at 2332.5 mhz for sdars and 70 - 80% efficien cy at gps/ glonass /galileo frequencies. using one patch for both services results in the most economical and space - efficient solution for demanding applications requiring both sdars and gnss functionality. at just 7.15 mm in height, the gpsdsf.35 is also extremely low - profile. t ypical applications: ? o em sharkfin automotive antennas ? t ruck mounted antenna systems t his antenna has been tuned and tested on a 70 x 70 mm ground plane. custom tuning services can be provided for further optimization to customer - specific device environments. contact your regional taoglas sales office for support.
spe - 18 - 8 - 078 - b /t/ah page 3 of 15 2. s pecification e lectrical f requency g ps: 1575.42 1.023 mhz g lonass: 1602 5mhz s dars(xm) : 2338.75 6.25 mhz c entre frequency 1 591 3 mhz 2338.75 3 mhz r eturn loss g ps: - 10db max. g lonass: - 10db max. s dars( xm ) : - 10db max. z enith gain g ps: + 3.4 dbi typ. g lonass: + 3.6 dbi typ. s dars( x m ) : + 4.7 dbi typ. e fficiency g p s: 69 % g lonass : 78 % sdars( xm ) : 67 % a xial ratio at zenith g p s: 5.0 db typ. g lonass: 7. 5 db typ. sdars(xm): 3.8 db typ. p olarization r . h . c . p . f or gps/ glonass l .h.c.p. f or sdars(xm) i mpedance 5 0 ? m echanical d imensions 3 5 x 35 x 7.15 mm g ps: 3 5 x 35 x 4 mm s dars: 25 x 25 x 3 mm m aterial c eramic p in diameter 0 . 8 mm p in length 2 .0 mm w eight 2 2.1 g environmental o peration temperature - 40c to + 85c h umidity n on - condensing 65c 95% rh * antenna properties were measured with the antenna mounted on 70*70mm ground plane
spe - 18 - 8 - 078 - b /t/ah page 4 of 15 3. a ntenna characteristics 3.1 r eturn loss 3.2 e fficiency -25 -20 -15 -10 -5 0 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (db) (mhz) gps_glonass sdars(xm) 0 10 20 30 40 50 60 70 80 90 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (%) (mhz) gps_glonass sdars(xm)
spe - 18 - 8 - 078 - b /t/ah page 5 of 15 3.3 a verage gain 3.4 p eak gain -10 -5 0 5 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (db) (mhz) gps_glonass sdars(xm) -5 0 5 10 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 (dbi) (mhz) gps_glonass sdars(xm)
spe - 18 - 8 - 078 - b /t/ah page 6 of 15 3.5 a xial ratio (zenith is at 0 ) 0 2 4 6 8 10 12 14 16 18 20 0 30 60 90 120 150 180 210 240 270 300 330 360 gps glonass sdars(xm) (db) ( degree ) x - z 0 2 4 6 8 10 12 14 16 18 20 0 30 60 90 120 150 180 210 240 270 300 330 360 gps glonass sdars(xm) (db) ( degree ) y - z 0 0 0
spe - 18 - 8 - 078 - b /t/ah page 7 of 15 3.6 i solation 3.7 x m gain requirements (satellite) C ground plane a ut location e levation angle(degrees) l inear average gain(dbic) p assive ground plane 2 0??25 - 1. 3 2 5??30 - 0. 7 3 0??50 0 .8 5 0??70 2 .9 7 0??90 3 .9 x m gain requirements (terrestrial) C ground plane a ut location e levation angle(degrees) a ntenna mean passive vp gain over solid angle (dbi) a ntenna p/p gain variation (db) p assive ground plane 0 ??10 - 5.7 - =5 - 4 .3 -70 -60 -50 -40 -30 -20 -10 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 isolation ( mhz ) ( db )
spe - 18 - 8 - 078 - b /t/ah page 8 of 15 4. a ntenna radiation pattern 4.1 m easurement setup the gpsdsf.35.7.a.08 antenna is tested on a 70 x 70mm ground plane in a ctia certified anechoic chamber. the test setup is shown below.
spe - 18 - 8 - 078 - b /t/ah page 9 of 15 4.2 2 d radiation pattern x - y plane x - z plane y - z plane -45 -35 -25 -15 -5 5 0 30 60 90 120 150 180 210 240 270 300 330 (dbi) 1575.42mhz 1602mhz y x -45 -35 -25 -15 -5 5 0 30 60 90 120 150 180 210 240 270 300 330 (dbi) 1575.42mhz 1602mhz 2338.75mhz z x -45 -35 -25 -15 -5 5 0 30 60 90 120 150 180 210 240 270 300 330 (dbi) 1575.42mhz 1602mhz z y
spe - 18 - 8 - 078 - b /t/ah page 10 of 15 5. 3 d radiation pattern
spe - 18 - 8 - 078 - b /t/ah page 11 of 15 6. m echanical drawing (u nit:mm)
spe - 18 - 8 - 078 - b /t/ah page 12 of 15 7. f eed pin pad layout recommendation (unit:mm)
spe - 18 - 8 - 078 - b /t/ah page 13 of 15 8. e valuation board - (unit:mm) g psdsfd.35.7.a.08
spe - 18 - 8 - 078 - b /t/ah page 14 of 15 9. p ackag ing
spe - 18 - 8 - 078 - b /t/ah page 15 of 15 t aoglas makes no warranties based on the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. t aoglas reserves the rights to this document and the information contained herein. reproduction, use or disclosure to third parties without express permission is strictly prohibited. c opyright ? taoglas ltd.

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