2 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-2040

2 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-2040

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$1235

The OBS-2040 is a compact, cavity-backed spiral antenna designed for high-performance transmission and reception across the 2.0 GHz to 4.0 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, no 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 benefits, it is ideal for a variety of demanding applications. Firstly, this antenna is particularly effective in medium-range communication, including WiFi, some satellite communications, and cellular networks. It provides a balance between range and data rate. In surveillance and radar systems, this antenna supports ground-based and airborne radar for medium-range detection, making it a key component in air traffic control and weather monitoring applications where moderate resolution and long-range coverage are needed. In addition, the antenna is also employed in electronic warfare (EW), particularly for signal interception and jamming. Its broad coverage makes it versatile for medium-range communication and radar systems used in general-purpose EW tasks. Lastly, it is used in broadcasting and satellite TV, especially for reliable, long-distance signal transmission. It is often utilized in satellite TV services and military communication systems, ensuring dependable and secure connections across large distances.

SKU: OBS-2040 Categories: Cavity Backed Spiral Antenna, RF Antenna

Description

SPEC

Cavity Backed Spiral Antenna

2GHz to 4GHz

OBS2040

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 4.0 GHz. The antenna exhibits an excellent impedance match and radiation pattern.

It is capable of receiving both linearly polarized signals and circularly polarized signals. The linear gain (dBil) is about 3 dB lower than the circular gain (dBic).

The antenna has advantages such as a low profile, planar aperture, no phase center offset, near-constant beam width across the frequency band, symmetrical radiation beam width, extreme flexibility for carrying, and lightweight.

These advantages make 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 also be used as a broadband feed for reflector antennas.

The antenna’s outer 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

  • Very convenient to carry
  • Wide frequency band
  • Lightweight
  • Small volume
  • Easy to package
  • Main lobe width
  • Circular polarization, wide beam width
Cavity Backed Spiral Antenna Specifications
Part No. OBS2040
Frequency 2GHz – 4GHz
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

PDF


Outline


OBS-2040 Outline

Plot


OBS-2040 Plot 1
OBS-2040 Plot 2
OBS-2040 Plot 3

Additional information

Min. Frequency (GHz)

2

Max. Frequency (GHz)

4

Gain (dBi)

-3 Typ~1 Typ16°

VSWR

2.5:1

Impedance (Ω)

50

Connection Type

SMA-Female

Polarization

LHCP/RHCP