此北斗频率目前有四个频段 1207 1268 1561 2492 MHZ) 有介质滤波器及介质天线系列，尺寸多 高稳定性，高质量的介质陶瓷，极好的方向图！用于矩形微波传输带天线，输送方式：通过地平面输送偏移。
1. ELECTRICAL SPECIFICATIONS
NO. | Part Number | Outline Dimension | Ground Plane |
1-1 | DA1590S25T4 | 25*25*4mm | 70*70 |
1-2 | Center Frequency | 1568±3MHz |
1-3 | Bandwidth | 35MHz min. |
1-4 | Impedance | 50Ω |
1-5 | Gain @ Zenith | +3dBi typical |
1-6 | Frequency Temperature Coefficient | 0±10 ppm/℃ |
1-7 | Return Loss @fo | -15dB min. |
1-8 | V.S.W.R | 2.0 max. |
1-9 | Axial Ratio @fo | 3.0dB max |
2. STRUCTURE AND MATERIAL
No. | Description | Structure and material |
2-1 | Antenna Substrate | Dielectric Ceramics |
2-2 | Pin | Copper |
2-3 | Electrode | Ag plated |
2-4 | Ground Base | Ag plated |
