8 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-80180

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8 GHz to 18 GHz Cavity Backed Spiral Antenna OBS-80180

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$1295

The OBS-80180 is a compact, cavity-backed spiral antenna designed for high-performance transmission and reception across the 8.0 GHz to 18.0 GHz frequency range. With moderate gain and VSWR, this circularly polarized antenna provides an excellent impedance match and radiation pattern.

Key features of this antenna include the ability to receive both linearly and circularly polarized signals, with linear gain approximately 3 dB lower than circular gain. Its low-profile design, planar aperture, minimal phase center offset, flexibility for carrying, and lightweight and symmetrical radiation beam width ensure consistent performance across the entire frequency band. The antenna’s outermost dimensions are a diameter of 68mm and a height of 50mm.

With all the above advantages, it is ideal for a variety of demanding applications. In high-resolution radar systems, it enhances detection and precision, making it ideal for ground-mapping radar, airborne surveillance, and military tracking systems, where pinpoint accuracy and the ability to detect smaller targets are essential. This antenna also supports shorter-range, high-capacity communication, offering high bandwidth and data rates for point-to-point microwave communication links, military data links, and other high-speed communication systems that require reliable, fast transmission over shorter distances. For precision targeting and imaging, especially in military applications, the 8-18GHz range ensures high accuracy, making it a key component in precision-guided radar systems and imaging technologies. Lastly, it is widely used in electronic warfare (EW) to jam or disrupt enemy radar and communication systems, delivering focused jamming and pinpoint accuracy in tactical operations.

SKU: OBS-80180 Categories: Cavity Backed Spiral Antenna, RF Antenna

Description

SPEC

Cavity Backed Spiral Antenna

8GHz to 18GHz

OBS-80180

The OBS-80180 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of 8.0 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. OBS-80180
Frequency 8.0GHz – 18.0GHz
Nominal Gain 1.4 dB Typ ~ 3.7 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

PDF


Outline


OBS-80180 Outline

Plot


OBS-80180 Plot 1

Additional information

Min. Frequency (GHz)

8

Max. Frequency (GHz)

18

Gain (dBi)

1.4 Typ~3.7 Typ

VSWR

2.5:1

Impedance (Ω)

50

Connection Type

SMA-Female

Polarization

LHCP/RHCP

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