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spe - 12 - 8 - 036 /b /wy page 1 of 15 specification part no. : ala.01 .07.0095 a product name : 1575mhz gps - galileo ceramic active loop module features : 16db one stage gps/galileo pcb dims: 45*10 *2.3mm mm rohs c ompliant
spe - 12 - 8 - 036 /b /wy page 2 of 15 1. introduction the activ e loop antenna ala.01 is best suited for applications where omni - directionality is important . th e average gain is similar to an 18mm active patch antenna but in a much narrower profile, only 2.3 mm at its highest point, allowing this antenna to be used perp endicular to the device main - board, or placed adjacent to the top or bottom of device main board. a one stage lna combined with a saw filter boosts the s/n (c/n) of the gps /galileo system and helps to overcome some noise effects from todays crowded device boards that passive antennas cannot resolve. the antenna can be placed in a plastic slot in the device housing. alternatively, adhesive foam, hot - melt, or non - conductive screws could be used to mount the antenna. the core antenna design principle of loop current flow tends to lock - out a lot of surface noise from close circuitry from entering the antenna.
spe - 12 - 8 - 036 /b /wy page 3 of 15 2. specification e lectrical frequency 1575.42 1.023mhz bandwidth (10db return loss) 70mhz typical peak gain typ. 3.1dbi avg. gain - 2.2dbi polarization linear vswr 2 max (depends on the special environment) dimension 5*3*0.5mm gain (with lna) 16 4db @ 9 0 o output impedance 50 polarization linear input voltage min. 2.6v, typ. 3.0v, max. 5.0 v lna frequency 1575.42 1.023mhz gain typ. 16db @ 3v typ. 17.8db @ 5v noise figure typ. 1.3db @ 3v filter (out of band attenu ation) saw filter (fo=1575.42 mhz) 40db typ. fo 50mhz 45db min. fo 100mhz output vswr < 2.0 in put voltage dc = 2.6~ 5 .0 v current dc = 13ma at 3.0v
spe - 12 - 8 - 036 /b /wy page 4 of 15 mechanical rf cable 95 ? 5 mm 1.13 coaxial cable connector ipex mhf(u.fl) dimensions 45*10*2.3mm weight 1.35 0.5g (typical) environmental operation temperature - 40 c to + 85 c storage temperature - 40 c to + 90 c humidity 10 to 95%
spe - 12 - 8 - 036 /b /wy page 5 of 15 3. performance measurement 3.1. b lock diagram
spe - 12 - 8 - 036 /b /wy page 6 of 15 4. measurement method 4.1. chip a) reflection co - efficient measurement a. equipment: network analyzer (aglient e5071a)(fig.1) b. item s 11 log chart(return loss) s 11 smith chart (impedance) figure 1. network an alyzer a) pattern measurement a. equipment: anechoic chamber (fig. 2), network analyzer (aglient e8753es) b. item: gain pattern, axial ratio figure 2. quiet room
spe - 12 - 8 - 036 /b /wy page 7 of 15 figure 3. schematic of measurement set - up
spe - 12 - 8 - 036 /b /wy page 8 of 15 4.2. lna a) parameter measurement a. equipment: network analyze r (aglient e5071b)(fig.4) b. s 11 , s 12 , s 21 , s 2 2 figure 4. network analyzer a) noise figure measurement a. equipment: noise meter (aglient e 4407b)(fig.5 ) b. environment: shielding room (fig. 6) c. item: n.f (noise figure)
spe - 12 - 8 - 036 /b /wy page 9 of 15 5. measured values 5.1. chip 5.1.1. s 11 smith chart (impedance) 5.1.2. s 11 log chart (return loss): bandwidth s 11 < - 10db
spe - 12 - 8 - 036 /b /wy page 10 of 15 5.1.3. s 11 vsr 5.1.4. radiation patterns (excluding lna)
spe - 12 - 8 - 036 /b /wy page 11 of 15 plane xz yz xy average gain - 1.62 - 1.57 - 3.44 peak gain 4.92 1.89 2.75
spe - 12 - 8 - 036 /b /wy page 12 of 15 5.2. low noise amplifier (lna) 5.2.1. s 11 (network analyzer inpu t power - 40db) 5.2.2. s 12 (network analyzer input power - 40db)
spe - 12 - 8 - 036 /b /wy page 13 of 15 5.2.3. s 21 (gain) (network analyzer input power - 40db) 5.2.4. 22 (gain) (network analyzer input power - 40db)
spe - 12 - 8 - 036 /b /wy page 14 of 15 5.3. noise figure
spe - 12 - 8 - 036 /b /wy page 15 of 15 6. drawing 1 chip antenna: 5*3*0.5mm 2 cable ?1.13 l=95 5mm 3 ipex mhfi(u.fl) 4 shielding case 5 pcb taoglas 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. taoglas reserves all rights to this document an d the information contained herein. reproduction, use or disclosure to third parties without express permission is strictly prohibited. copyright ? taoglas ltd.

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