GPS receiver A1080-A
8.2 Active Antenna
General GPS active antenna specification:
Limitations:
•
Supply voltage according to voltage fed into VANT pin (5V max.)
•
Supply current 50mA (max.)
Recommendations:
•
Gain
≥
20dB (should not exceed 35dB)
•
Noise
figure
≤
1.5dB
The recommendations apply to the majority of active antennas that can be found in
the market. Anyhow, the quality of the GPS antenna chosen is of paramount impor-
tance for the overall sensitivity of the GPS system.
The system design needs to reflect the supply voltage of the antenna. If the supply
voltage is equal to Vcc, Vcc can be connected to VANT. If the antenna requires a
different supply voltage, the antenna bias can be provided through the VANT pin.
Page 20 of 31
User’s Manual
V2.3 - 07/07
