Provides 4 cardioid patterns in the cardinal directions utilizing appropriate AAI modulator

PRODUCT SPECIFICATION
Product Code --- DASA-3151 DF ANTENNA
Downloadable PDF file

Top View

Bottom View

An Accurate Compact Antenna for Mobile Operations

The DASA-3151 Mobile DF Antenna is a 2 band VHF/UHF antenna consisting of annular slot elements recessed in the roof of a vehicle or on the underside of an aircraft. It includes the modulator, controller and coax cables. The antenna is designed to generate accurate and repeatable bearings on vertically polarized signals in the 20 MHz to 1000 MHz frequency range with extended coverage down to 1 MHz.

The DASA-3151 can be mounted above the headliner in a vehicle or remoted to most any ‘flat’ area. It is primarily designed for use in a 4 door F-150, Tahoe or similar vehicle. All power and control signals to the antenna are provided through a single control cable via the DF processor. The received signal, with bearing information encoded, is routed to the receiver through RF coaxial cable. Control signals are compatible with the AADF-3100 DF Processor from Antenna Authority, Inc.

Corner detail Installed in roof

Completed installation

Electrical Specifications

Frequency Coverage:	20 MHz to 1 GHz
Azimuths Coverage:	360° in azimuth
Calibration	Manually set depending on receiver and antenna location
DF Technique:	Watson-Watt single frequency
Antenna:	4-element dual annular slot, multiple bays
Bearing Accuracy:	6° rms
Power:	Voltage: 11.5 - 14.5 VDC
	Current 0.3 amps
Polarization:	Vertical
Impedance:	50 ohms nominal
Bands	2
Connectors	BNC, DB-9

Mechanical Specifications

Dimensions:	Width: 24"  -  Length: 32"
	Height: 2",  Weight: 10 lbs
Environments:	Operating: -40°C to +60°C
	Storage: -40°C to +70°C   Humidity: 95%
Material:	Terne Metal, FR-4, Foam

 Typical Gain and Pattern of Annular Slot Antenna

Ordering Information

Antenna          Model No.      DASA-3151 complete with modulator and cables

DF Processor required        Model No. AADF-3101

One year warranty on parts and labor

Specifications subject to change without notice

Printed in U.S.A. Copyright 1/22/2009

Downloadable PDF file

If you have a need for optimized frequency coverage not indicated here, please contact Ferrel  - info below - we can customize to your needs.