2 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-20180
$1235
Frequency: 2.0GHz-18.0GHz
Gain: -3Typ~1Typ
VSWR: 2.5:1
Connection Type: SMA Female
Polarization: LHCP/RHCP
The OBS-20180 is suitable for electronic-warfare, direction-finding, telemetry, and surveillance systems, as well as flush-mounted airborne applications.
- Description
- Datasheet
- Dimensions
- Plot
- Additional information
Description
Cavity Backed Spiral Antenna
2GHz to 18GHz
OBS20180
The OBS20180 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 excellent impedance matching and a well-defined radiation pattern.
It is capable of receiving both linearly polarized and circularly polarized signals. The linear gain (dBil) is about 3 dB lower than the circular gain (dBic).
The antenna offers advantages such as a low profile, planar aperture, no phase center offset, near-constant beam width across the frequency band, symmetrical radiation beam-width, high flexibility for portability, and lightweight design.
These features make it ideal for applications in electronic warfare, direction finding, telemetry, surveillance systems, and flush-mounted airborne installations. The antenna can also function as a broadband feed for reflector antennas.
The antenna’s dimensions are a diameter of 68mm and a height of 50mm.
Applications
- Satellite communications
- Personal mobile communications
- Electronic warfare, direction finding, telemetry, and surveillance systems
- Embedded airborne applications
Features
- Highly portable
- Wide frequency band
- Lightweight
- Compact design
- Easy to package
- Wide beam width
- Circular polarization with consistent beam width
Cavity Backed Spiral Antenna Specifications | |
Part No. | OBS20180 |
Frequency | 2GHz – 18GHz |
Nominal Gain | -3 dB Typ ~ 1 dB Typ |
VSWR | Maximum 2.5:1, Typical 2.0:1 |
Pattern | Directional Beam |
3 dB Beam Width | 65°Minimum, Typical |
10 dB Beam Width | 120°Typical |
Input Impedance | 50 Ohms Nominal |
Input Connector | SMA Female |
Additional information
Min. Frequency (GHz) | 2 |
---|---|
Max. Frequency (GHz) | 18 |
Gain (dBi) | -3 Typ~1 Typ16° |
VSWR | 2.5:1 |
Impedance (Ω) | 50 |
Connection Type | SMA-Female |
Polarization | LHCP/RHCP |