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2 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-20180

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$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.

SKU: OBS-20180 Categories: Cavity Backed Spiral Antenna, RF Antenna

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
2 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-20180-Outline
2 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-20180-Plot
2 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-20180-Plot
2 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-20180-Plot

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