- An antenna system composed of many identical single antennas (such as symmetrical antennas) arranged according to a certain rule, also ca……
BD2 B3: 1268.52±10.23MHz
GPS L1: 1575.42±1.023MHz
Polarization: Right-handed circular polarization
Out of roundness: ≤±5.5dB (0°≤elevation angle <30°);
≤±4.0dB (30°≤elevation angle<70°); ≤±2.5dB (70°≤elevation angle≤90°);
Standing wave (50Ω): ≤1.6
Axial ratio: ≤6dB (elevation angle ≥60°)
Gain (center frequency point): ≥ -7dBic (elevation angle ≥10°);
≥ -5dBic (elevation angle ≥30°); ≥ -3dBic (elevation angle ≥60°); ≥ 1.0dBic(MAX);
At 1268.52±10.23MHz and 1575.42±1.023MHz, the relative center frequency gain loss is ≤2dB;
Front-to-back ratio: ≥12dB
Media size: 35355mm
Array method: 5 frames share a 0.8mm thick PCB board, and the height of the layout area under the PCB board is less than 3mm.
BD element mutual coupling coefficient: ≤-15dB.