数字蜂窝电话modem附件 / 21831
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这个产品是无效的且被替换: 32256.
这个产品是无效的且被替换: 32256.
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概览
这种半波长的双极性鞭状天线直接连接到RavenXT系列数字蜂窝电话网络modem；不需要其它的天线线缆。21831为更低增益的全向天线，适合短距离数据传输。
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技术说明
21831直接连接到RavenXT系列数字蜂窝电话网络modem；不需要其它的天线线缆。这种单一增益的全向天线应当安装在建筑内或机箱内。
全向天线从所有方向接收信号（例如：不需要将天线直接指向信号源）。
产品规格
| Connector | SMA pin (male), plug |
| Frequency Band | 824 to 896 MHz |
| Gain | < 0 dBD (1.8 dBi) |
| Antenna Type | 1/2 wave dipole, indoor |
| Radiation Pattern | Omnidirectional |
| Polarization | Vertical |
| Impedance | 50 ohm |
| VSWR | < 2.0:1 |
| Material | Black polyurethene with polycarbonate swivel and black chrome-plated brass connector |
| Operating Temperature | -20° to +65°C |
| Storage Temperature | -30° to +75°C |
| Diameter | 1.25 cm (0.49 in.) |
| Length | 22.4 cm (8.8 in.) |
| Weight | < 5 g (< 0.01 lb) |
兼容性
The 21831 is compatible with any radio that has an SMA jack connector that operates between 824 and 896 MHz. Specifically, it is compatible with the RavenXT-series and LS300 cellular modems with SMA connectors. It is not compatible with the TNC antenna connections of the Raven100-series and Redwing100-series modems.
常见问题解答
21831: 1
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Unless otherwise designated as a powered or amplified antenna, antennas are passive devices that do not require external power for operation.
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