Brief description: Applied to the front end of satellite navigation receivers, it can adaptively suppress in-band suppression interference while ensuring satellite signal reception, thereby improving the reliability of the satellite navigation system.
[Product Introduction and Application]
The seven-element nulling antenna is used in the front end of satellite navigation receivers. While ensuring the reception of satellite signals, it can adaptively suppress in-band suppression interference, thereby improving the reliability of the satellite navigation system. The seven-element anti-interference antenna consists of an array antenna, seven BD2_B3 coherent receiving channels, a signal processing unit, a multi-band low noise amplifier unit, an up-conversion combiner unit, and a power supply control unit.
【The main technical parameters】
working frequency | Receive GPS L1/L2 frequency, BD2 B1/B2/B3 (including military code) frequency, Glonass L1/L2 frequency |
Anti-interference mode | BDS B3 frequency anti-interference |
Anti-interference number | Can resist up to 6 broadband, narrowband or mixed interferences |
Anti-interference airspace | Azimuth angle 0°～360°, elevation angle 0°～90° |
Dry signal ratio | When the level of the useful signal on the antenna surface is -130dBm, it can be positioned normally and meet the positioning accuracy requirements. Single interference ≥90dB, triple interference ≥80dB, six interference ≥70dB |
Burnout resistance | ≥1W |
Output Power | -60dBm ～ -70dBm |
Equivalent Noise Figure | Less than 2dB |
working environment | Size: ≤ Ф290×40mm Working temperature: -40℃ +70℃, storage temperature: -55℃～+85℃ |
【Main Features】
1. Receive BD2 B1/B3, GPS L1/L2, and GLONASS L1/L2 satellite navigation signals, filter and low-noise amplify them, and then output their RF signals for high-precision calculation of satellite receivers.
2. It has the function of resisting multiple broadband suppression interference at the BD2 B3 frequency point, and outputs the modulated carrier signal of the B3 frequency point after anti-interference processing, as well as the high-precision satellite navigation signals of BD2 B1, GPS L1 and GLONASS L1.
3. The anti-interference processor has the pass-through function: fault pass-through function, command switch pass-through function, and power switch pass-through function. When the 28V power supply voltage is abnormal, the anti-interference of the zeroing antenna stops working, and the power supply switches to the 5V power supply of the RF core wire to feed the center array element and pass through the center high-precision array element signal.
4. The software online upgrade function can be realized through the test interface, and the pass-through and anti-interference function settings of the components can be performed, and the device status and interference intensity detection can be performed.