Model LPM-28C
VHF/UHF Dual Polarized LP Antenna 20-100 MHz 7.9 dBi Backmount

Dual polarized antenna with backmount kit. MIL nomenclature AN-GSA-131(V)3.

Frequency Range: 20-100 MHz
Gain: 7.9 dBi
VSWR: 2:1 Max
Polarization: Horizontal & Vertical
Size: 35′ L x 25′ W x 25′ H
Military Nomenclature: AN/GSA-131(V)3
Model Number: LPM-28C

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The VHF dual polarized log periodic antenna, normally used in surveillance activities, has two independent (one horizontal, one vertical polarized) outputs and is designed for RF reception in extremely hostile environments.


The antennas are heavy duty and built to withstand high winds with icing conditions. All materials have good corrosion resistant qualities.


Available in a mast-mounted version with either a powered or manual pedestal, or in a back-mounted configuration for single-directional coverage.

Equipment Supplied:

Dual polarized LP array, fiberglass mast, feed harness, and manual pedestal.

Optional Equipment:

TS-1A (70 foot tower)
TS-9A (20 foot tower)
Manual positioner
Electric positioner

Spec Sheet


Wind & Ice 100 mph wind with no ice, 60 mph wind with .5 in. ice.
H Plane Beamwidth 103 degrees typical
Front to Back Ratio 15 dB
RF Inputs 2
Weight 2,180
VSWR 2:1 Max
Frequency Range 20-100 MHz
Size 35′ L x 25′ W x 25′ H
Input Impedance 50 Ohms
E-Plane Beamwidth 65 degrees typical
Gain 7.9 dBi, avg
Military Nomenclature AN/GSA-131 (V)3
Pedestal Backmount
Polarization Horizontal & Vertical
Primary Power N/A
Power, kW Receive