® assuredcommunications™ RF-1944 SERIES BROADBAND INVERTED VEE HF ANTENNA The RF-1944 antenna series are lightweight, transportable broadband dipole antennas that provide radiation patterns ideal for HF skywave communications from 0 to 1500 miles. The rugged, yet simple design allows quick installation into its primary Inverted Vee configuration. The termination loads provide instantaneous bandwidth performance over the entire 1.6 to 30 MHz frequency range. The RF-1944 antenna is an excellent choice when operating with frequency agile waveforms because an antenna coupler is not required. The RF-1944 antenna series consists of two antennas designed for two power levels. ■ The RF-1944-AT150 (shown above) is for up to 150 Watts and weighs 9 lbs (4.1 kg). ■ The RF-1944-AT400 is for up to 400 Watts and weighs 11 lbs (5 kg). It is slightly larger than the 150-Watt version. The antenna is comprised of a balun, two dipole radiating elements, two terminating loads, two ground rods, two ground stakes, coaxial cable, weighted throwing line and carrying bag. The coaxial cable has male BNC connectors for direct attachment to the balun and radio or power amplifier. The RF-1944 antenna does not include a mast. Specifications for the RF-1944 Electrical Mechanical ■ Frequency Range 1.6 to 30 MHz ■ RF Connector BNC, male ■ RF Power Capacity 150 and 400 Watts ■ RF Coaxial Cable RG-58 (10 meters) ■ Input Impedance 50 ohms (nominal) ■ Deployed Dimensions 164 ft (50 meters) ■ Radiation Pattern See plot below ■ Stowed Size (AT150) 16 W x 13 H x 3 D inches 40.6 W x 33 H x 7.6 D cm ■ Polarization Primarily Horizontal ■ Weight AT150 - 9 lbs (4.1 Kg) AT400 - 11 lbs (5 Kg) ■ VSWR See plot below ■ Color OD finish / Black ■ Gain -16 dBi at 2 MHz -2 dBi at 30 MHz ■ Erection time 10 minutes for 2 people Environmental Features ■ Temperature Operating; -25° to 55°C ■ ■ ■ ■ ■ Storage; -40° to 70°C ■ Relative Humidity 0 to 100% Broadband Operation Lightweight Robust Design Encased Terminations Small Carry Bag RF-1944 VSWR and Impedance Plots 1 3.5 0.5 2 VSWR 3.0 0.2 2.5 5 0 2.0 1.5 0.2 0.5 1 ∞ 2 -0.2 -5 1.0 0.0 5.0 10.0 15.0 20.0 25.0 -0.5 30.0 -2 -1 Frequency (MHz) 4 MHz 0 8 MHz 16 MHz 24 MHz Specifications are subject to change without notice. ® RF-1944 Radiation Patterns for 4, 8, 16 and 24 MHz RF Communications Division | 1680 University Avenue | Rochester, NY USA 14610 www.harris.com 1-585-244-5830 assuredcommunications™ © Copyright 2005 Harris Corporation 05/05 DS-324A