PRODUCT SPECIFICATION

Product Code --- CBS-12
Cavity Backed Spiral
downloadable pdf file

This self-complementary Archimedean spiral antenna is a frequency independent antenna. It is a lightweight medium-gain array designed to receive a circularly polarized wave.  The Archimedes spirals typically cover a 10 to 1 frequency range while maintaining essentially constant impedance over the band.  The circularly polarized antennas have been designed for broad-beam, broadband applications and provide a compact, lightweight antenna configuration which can be easily flush mounted. They are widely used in systems whose primary functions are surveillance, direction finding and telemetry.  This Spiral antenna is mounted in a square structure and made on FR4 .063” fiberglass with a flat front face that can be easily mounted in the side of a vehicle.   It is terminated and loaded with absorbing foam.  Its low frequency is a function of the size and depth of the cavity, while the upper frequency is limited by the detail of the center structure.  It has greater than a 10 dB F/B ratio before mounting into a vehicle. 

Electrical Specifications

Frequency Coverage:		300 MHz – 3.2 GHz
Azimuths Coverage:		80° beam width typical for 3 DB down
Antenna:		4-element log-periodic dipole array
Gain:		-1.5 to + 3 dBi
Polarization:  CBS-12-R		Right Hand Circular
Polarization:  CBS-12-L		Left Hand Circular
Impedance:		50 ohms nominal
Connectors		BNC

Mechanical Specifications
Dimensions:                                                                       Weight:                                   Environments:                         Material:                                  downloadable pdf file		Width: 12" - Length : 12" - Thick: 5” 5 Lbs Operating: -20°C to +60°C Storage: -40°C to +70°C Humidity:95% Aluminum, FR-4, Foam Stable rugged construction, compact, light weight. Works in harsh conditions

24" version available
Refurbished 24" available

Gain and Pattern Plots

Pictures of Typical Construction

12" Frequency range - 300 MHz to 3.2 GHz

PDF Printable Brochure

Specifications subject to change without notice Printed in U.S.A. Copyright 6/1/2008