Antenna Authority, Inc
Phone (770) 577-7969





Product Code --- QLPD-3120 MOBILE DF ANTENNA
(for use with AAI 3100 DF Processor)
PDF File for this product


QLPD-3120 Mobile DF Antenna

An Accurate, Compact Antenna for Mobile Operations

The QLPD-3120 Mobile DF Antenna is a combination (UHF & L Band) antenna, consisting of four log periodic elements enclosed in a vacuum ­formed, ruggedized, compact, lightweight, abrasive-resistant plastic cover with UV protection.  The QLPD-3120 is designed to receive vertically polarized signals in the 600 MHz to 3 GHz frequency range providing accurate and repeatable bearings.

The antenna enclosure is designed to be mounted on a steel vehicle roof.  Magnetic mounts are attached to the base to provide stability and facilitate quick and easy vehicle installation. Slots are also included for safety straps.

All power and control signals to the antenna are provided through a single control cable from the DF processor. The received signal, with bearing information encoded, is routed to the receiver through a coaxial cable. Control signals are compatible with the companion AADF-3100 Processor from Antenna Authority Inc.

Electrical Specifications

Frequency Coverage:   600 MHz - 3.0 GHz
Azimuths Coverage:   360°
DF Technique:   sequential
Antenna:    4-element log-periodic dipole array
Gain:    3  to 5 dBi
Bearing Accuracy:    5° rms
Power:   Voltage: 12 VDC supplied by processor
Polarization:    Vertical
Impedance:   50 ohms nominal
Bands:    One
Connectors:     TNC, and PT02A12-8P  

QLPD-3120 Gain Curves

Mechanical Specifications

Dimensions:   Width: 20.5" (52 cm) x Length : 20.5" (52 cm) x Height: 12" (30 cm)
Weight:      15 Lbs

Operating: -20°C to +50°C Storage: -40°C to +70°C

Material:   Aluminum, FR-4, Foam
Cover:   White PVC w/UV Protection


Stable, rugged construction, in a compact and light weight design that works in harsh conditions.

Ordering Information    
Antenna:   Model No. QLPD-3120
Processor Required:   Model No. AADF-3100

Specifications subject to change without notice

Printed in U.S.A. Copyright 5/1/2010
PDF File for this product

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

Antenna Authority offers a wide assortment of directional, wideband antennas and other equipment used for radio direction finding and Geo location. We are experts in covert antennas, vehicles and their operation. We are also ready to design new products to meet your specific needs.

Antenna Authority, Inc.                Ferrel Bentley - E-Mail
3381 W. County Line Road
Douglasville, Ga. 30135-1145
(770) 577-7969
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