ALA.01.07.0095A

SPECIFICATION Part No. : ALA.01.07.0095A Product Name : 1575MHz GPS-GALILEO Ceramic Active Loop Module Features : 16dB One Stage GPS/GALILEO PCB Dims: 45*10*2.3mmmm RoHS Compliant SPE-12-8-036/B/WY Page 1 of 15 1. Introduction The active loop antenna ALA.01 is best suited for applications where omni-directionality is important. The average gain is similar to an 18mm active patch antenna but in a much narrower profile, only 2.3mm at its highest point, allowing this antenna to be used perpendicular 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 today’s 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 2 of 15 2. Specification ELECTRICAL 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 @ 90o Output Impedance 50Ω Polarization Linear Input Voltage Min. 2.6V, Typ. 3.0V, Max. 5.0V LNA Frequency Gain Noise Figure 1575.42 ± 1.023MHz Typ. 16dB @ 3V Typ. 17.8dB @ 5V Typ. 1.3dB @ 3V Saw Filter (fo=1575.42MHz) Filter (out of band attenuation) 40dB typ. fo±50MHz 45dB min. fo±100Mhz Output VSWR < 2.0 Input Voltage DC = 2.6~5.0V Current DC = 13mA at 3.0V SPE-12-8-036/B/WY Page 3 of 15 MECHANICAL RF Cable 955mm 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 4 of 15 3. Performance Measurement 3.1. Block Diagram SPE-12-8-036/B/WY Page 5 of 15 4. Measurement Method 4.1. Chip a) Reflection Co-efficient Measurement a. Equipment: Network Analyzer (Aglient E5071A)(Fig.1) b. Item S11 Log Chart(Return Loss) S11 Smith Chart (impedance) Figure 1. Network Analyzer 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 6 of 15 Figure 3. Schematic of measurement set-up SPE-12-8-036/B/WY Page 7 of 15 4.2. LNA a) Parameter Measurement a. Equipment: Network Analyzer (Aglient E5071B)(Fig.4) b. S11, S12, S21, S22 Figure 4. Network Analyzer a) Noise Figure Measurement a. Equipment: Noise Meter (Aglient E4407B)(Fig.5) b. Environment: Shielding Room (Fig. 6) c. Item: N.F (Noise Figure) SPE-12-8-036/B/WY Page 8 of 15 5. Measured Values 5.1. Chip 5.1.1. S11 Smith Chart (Impedance) 5.1.2. S11 Log Chart (Return Loss): Bandwidth S11