0.8 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-840
$1765
The OBS-840 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of 0.8 GHz to 4.0 GHz. The antenna exhibits an excellent impedance match and radiation pattern.
It is capable of receiving both linearly polarized signals and a circularly polarized signal.The linear gain (dBil) is about 3 dB lower than the circular gain (dBic).
The antenna has the advantages of a low profile, a planar aperture, no phase center offset, near constant beam width across the frequency band, normally symmetrical radiation beamwidth,extreme flexibility for carrying, and light weight.
The seadvant ages render the antenna a very good candidate for electronic-warfare,direction-finding, telemetry and surveillance systems, as well as flush-mounted airborne applications. The antenna can be used as a broadband feed for reflector antennas.
The antennas outermost dimensions are a diameter of 68mm and height of 50mm.
- Description
- Additional information
Description
SPEC
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Cavity Backed Spiral Antenna 0.8GHz to 4GHz |
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OBS-840 |
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The OBS-840 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of 0.8 GHz to 4.0 GHz. The antenna exhibits an excellent impedance match and radiation pattern. It is capable of receiving both linearly polarized signals and a circularly polarized signal. The linear gain (dBil) is about 3 dB lower than the circular gain (dBic). The antenna has the advantages of a low profile, a planar aperture, no phase center offset, near constant beam width across the frequency band, normally symmetrical radiation bean width extreme flexibility for carrying, and light weight. The seadvant ages render the antenna a very good candidate for electronic-warfare, direction-finding, telemetry and surveillance systems, as well as flush-mounted airborne applications. The antenna can be used as a broadband feed for reflector antennas. The antenna’s outermost dimensions are a diameter of 68mm and height of 50mm. |
Applications Satellite communications Embedded Airborne Applications
Features Very convenient to carry Wide frequency band Light Weight small volume Easy package Main lobe width With circular polarization, wide beam width
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Part No. |
OBS-840 |
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Frequency* Nominal Gain3 dB VSWR Pattern 3 dB Bean width 10 dB Bean width Input Impedance Input Connector |
0.8GHz-4.0GHz 0.6 Typ~2.2Typ 2.5?1Maximum2.0:1 Typical Directional Bean 65°Minimum?Typical 120° Typical 50 Ohms Nominal SMA-female
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Outline
Plot
Additional information
| Min. Frequency (GHz) | 0.8 |
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| Max. Frequency (GHz) | 4 |
| Gain (dBi) | 0.6 Typ~2.2Typ |
| VSWR | 2.5:1 |
| Impedance (Ω) | |
| Connection Type | |
| Polarization |
