2 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-20180
$1235
The OBS-20180 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of2.0 GHz to18.0 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 seadvantages 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 2.6 and height of 2.0.
- Description
- Additional information
Description
SPEC
Cavity Backed Spiral Antenna 2GHz to 18GHz |
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OBS20180 |
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The OBS2040 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of 2.0 GHz to 18.0 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 beam-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. |
OBS20180 |
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Frequency* Nominal Gain3 dB VSWR Pattern 3 dB Beam width 10 dB Beam width Input Impedance Input Connector |
2GHz-18GHz -3 Typ~1 Typ16° 2.5?1Maximum2.0:1 Typical Directional Bean 65°Minimum?Typical 120° Typical 50 Ohms Nominal SMA-female
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Outline
![](https://www.rfecho.com/wp-content/uploads/Antenna/OBS/outline/OBS-20180-outline.jpg)
Plot
![](https://www.rfecho.com/wp-content/uploads/Antenna/OBS/plot/OBS-20180-plot1.jpg)
![](https://www.rfecho.com/wp-content/uploads/Antenna/OBS/plot/OBS-20180-plot2.jpg)
![](https://www.rfecho.com/wp-content/uploads/Antenna/OBS/plot/OBS-20180-plot3.jpg)
Additional information
Min. Frequency (GHz) | 2 |
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Max. Frequency (GHz) | 18 |
Gain (dBi) | -3 Typ~1 Typ16° |
VSWR | 2.5:1 |
Impedance (Ω) | |
Connection Type | |
Polarization |