0.8 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-840

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0.8 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-840

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$1,765 $1,500

The OBS-840 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of 0.8 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 a circularly polarized signal.The linear gain (dBil) is about 3 dB lower than the circular gain (dBic).
The antenna has the advantages of a low profile, a planar aperture, no phase center offset, near constant beam width across the frequency band, normally symmetrical radiation beamwidth,extreme flexibility for carrying, and light weight.

The seadvant ages render 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 be used as a broadband feed for reflector antennas.

The antenna’s outermost dimensions are a diameter of 68mm and height of 50mm.

Description

SPEC

Cavity Backed Spiral Antenna

0.8GHz to 4GHz

OBS-840

The OBS-840 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of 0.8 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 a circularly polarized signal. The linear gain (dBil) is about 3 dB lower than the circular gain (dBic).

The antenna has the advantages of a low profile, a planar aperture, no phase center offset, near constant beam width across the frequency band, normally symmetrical radiation bean width extreme flexibility for carrying, and light weight.

The seadvant ages render 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 be used as a broadband feed for reflector antennas.

The antenna’s outermost dimensions are a diameter of 68mm and 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

Light Weight

small volume

Easy package

Main lobe width

With circular polarization, wide beam width

 

Part No.

OBS-840

Frequency*

Nominal Gain3 dB

VSWR

Pattern

3 dB Bean width

10 dB Bean width

Input Impedance

Input Connector

0.8GHz-4.0GHz

0.6 Typ~2.2Typ

2.5?1Maximum2.0:1 Typical

Directional Bean

65°Minimum?Typical

120° Typical

50 Ohms Nominal

SMA-female

 

 

 

PDF

Outline

OBS 840 outline 0.8 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-840

Plot

OBS 840 plot1 0.8 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-840

Additional information

Min. Frequency (GHz)

0.8

Max. Frequency (GHz)

4

Gain (dBi)

0.6 Typ~2.2Typ

VSWR

2.5:1

Impedance (Ω)

Connection Type

Polarization

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