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18 GHz to 26.5 GHz Cavity Backed Spiral Antenna OBS-180265

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$1235

Frequency: 18.0GHz-26.5GHz
Gain: -4Typ
VSWR: 2.5:1
Connection Type: SMA Female
Polarization: LHCP/RHCP
The OBS-180265 is suitable for electronic-warfare, direction-finding, telemetry, and surveillance systems, as well as flush-mounted airborne applications.

SKU: OBS-180265 Categories: Cavity Backed Spiral Antenna, RF Antenna

Description

Cavity Backed Spiral Antenna

18GHz to 26.5GHz

OBS-180265

The cavity-backed spiral antenna OBS-180265 is a compact, moderate gain, moderate VSWR, circularly-polarized antenna designed to transmit and receive in the frequency band of 18.0 GHz to 26.5 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 beamwidth across the frequency band, symmetrical radiation beamwidth, 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 beamwidth
  • Circular polarization with consistent beamwidth
Cavity Backed Spiral Antenna Specifications
Part No. OBS-180265
Frequency 18.0GHz – 26.5GHz
Nominal Gain -4 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
18 GHz to 26.5 GHz Cavity Backed Spiral Antenna OBS-180265-Outline
18 GHz to 26.5 GHz Cavity Backed Spiral Antenna OBS-180265-Plot
18 GHz to 26.5 GHz Cavity Backed Spiral Antenna OBS-180265-Plot
18 GHz to 26.5 GHz Cavity Backed Spiral Antenna OBS-180265-Plot

Additional information

Min. Frequency (GHz)

18

Max. Frequency (GHz)

26.5

Gain (dBi)

-4 Typ

VSWR

2.5:1

Impedance (Ω)

50

Connection Type

SMA-Female

Polarization

LHCP/RHCP