This product is no longer available and has been replaced by: 32256.
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Overview
The 21831 is a half-wave dipole whip antenna designed to attach directly to the SMA connector of a cellular modem operating at a frequency of 850 MHz. An antenna cable is not required. The 21831 is a lower-gain, omnidirectional antenna that transmits short distances.
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Detailed Description
The 21831 attaches directly to a cellular modem with SMA antenna connector. An antenna cable is not required. This unity gain omnidirectional antenna should reside inside a building or enclosure.
Specifications
| 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) |
Compatibility
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.
Frequently Asked Questions
Number of FAQs related to 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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