Model HT-20
HF Transportable Short Range Antenna 2-30 MHz

Frequency Range: 2-30 MHz
Gain: (2 MHz) -16.9 dBi, (30 MHz) -3.0 dBi
VSWR: 2.0:1 max
Polarization: Primarily Horizontal
Pattern: Omnidirectional
Deployed Size: 27′x120′x27′

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The HT-20 is a lightweight transportable HF antenna that provides excellent radiation characteristics for short range 0 to 300 mile circuits. The lightweight rugged design and quick erection features are ideal for meeting rapid deployment requirements. The installed geometry minimizes land area usage and permits installation in the space constraints typically encountered in an operational area.


The key to the transportable design is the lightweight telescoping mast which collapses to a transport length of 63 inches for ease of storage and handling.


The primary mode of propagation is HF Near Vertical Incident Skywave (NVIS) with the maximum radiation directed toward the zenith. The antenna provides broadband operation in the 2-30 Mhz frequency range with a maximum VSWR of 2:1. The 50 ohm input impedance is achieved by a mast-top mounted balun feeding the dipole elements. The antenna is rated at 1 kW average, 2 kW PEP input power.

Equipment Supplied:

Equipment supplied includes the telescoping mast, element wires, balun, terminations, accessory kit and canvas carrying bag.

Optional Equipment:

Transit case.

Spec Sheet


Wind 90 MPH with out ice, 50 MPH with .5 inch Radial Ice
Humidity 96 % with a temperature of 95 F
Rain MIL-STD-810, Method 506.2, Procedure I
Salt Fog MIL-STD-810, Method 509.2, Procedure I
Input Connector Type HN
Azimuth Patterns, 16 to 30 MHz +/- 3.3 Db Omni
Azimuth Patterns, 2 to 16 MHz +/-1.1 Db Omni
Gain, 5 to 30 MHz 0 dBi
Altitude Operation 12,000 feet
Deployed Size, Feet 150 x 150 x 22
VSWR, 5 to 30 MHz 2.0:1 Max
VSWR, 2 to 5 MHz 2.3:1 Max
Frequency Range 2-30 MHz
Power Capability 3 kW Average / PEP
Finish 383 CARC Paint
Stowed Weight Total 385 lbs
Gain, 2 to 3 MHz -4 dBi Minimum
Snow 40 lbs / sq ft
Stowed Size, #2 Transit Frame, Inches 48 L x 16 W x 12 H
Input Impedance 50 Ohms Unbalanced
Altitude Storage 50,000 feet
Temperature Operation -60 F to +155 F
Temperature Storage -70 F to +155 F
Stowed Size, #1 Transit Frame, Inches 75 L x 19 W x 25 H
Elevation Pattern, Above 8 MHz Gain Max at Zenith
Polarization Horizontal and Vertical
Solar Radiation MIL-STD-810, Method 505.2, Procedure II
Fungus MIL-STD-810, Method 508.3
Sand MIL-STD-810, Method 510.2, Procedure II
Vibration MIL-STD-810, Method 514.3, Procedure II
Shock MIL-STD-810, Method 516.3, Procedure IV
Elevation Pattern, Below 8 MHz Not Lower than 28 degrees Above Horizon