® assuredcommunications™ RF-398-02/03 VHF LOW-BAND, VERTICAL DIPOLE ANTENNA SERIES The RF-398-02/03 antenna series is a center-fed, EMP protected, broadband (30 to 90/108 MHz), vertically polarized whip antenna designed for permanent mounting on vehicles, shelters, towers, etc. While providing a slightly lesser gain than the end-fed RF-388A (AS-3013/VRC) antenna, the RF-398-02/03 antenna series does not require a good ground plane for optimum performance, making this antenna ideal for vehicle, tower, or rooftop installations where good ground plane is not available. The RF-398-02/03 antenna series is rated at 100 watts, with a nominal impedance of 50 ohm. It maintains a VSWR of less than 3.5:1 over the entire frequency spectrum, without the need for tuners or band switching. The unit consists of two fiberglass radiating sections, a mount with a flexible spring, and mounting hardware. Order the RF-292 Universal Antenna Mount for vehicular mounting or the RF-1584 Antenna Mast Mount for tower mounting. Specifications for the RF-398-02/03 General Frequency Range RF-398-02: 30 to 90 MHz RF-398-03: 30 to 108 MHz Height 2.9 m (117 in) Weight 4.3 kg (9.5 lb) Polarization Vertical RF Connection BNC female Impedance 50 ohms (nominal) Bolt-Hole Pattern Four 0.437 inch holes spaced on a 4.5 inch bolt-hole circle VSWR Less than 3.5:1 (per MIL-A-49283) Gain 30 MHz: -6.3 dB* 50 MHz: -1.2 dB* 90 MHz: -3.0 dB* *reference to a 1/4 Quarter wave whip on ground plane Power Rating 100 Watts Matching Circuit Passive, broadband Radiation Pattern Omnidirectional Salt Spray Salt spray resistant Construction Color: MIL-STD-383, Military Green Radome: G-10 Fiberglass Spring: Stainless Steel with black oxide coating Insulator: Polycarbonate Features ■ ■ ■ ■ ■ ■ Center feed to reduce platform dependence Multi-section for easy assembly/ disassembly Standard NATO bolt pattern for easy mounting Instantaneous bandwidth, no tuning Feed through base with spring Provides EMP protection Typical Elevation patterns for HMMWV mounting at 30, 50, and 90 MHz Specifications are subject to change without notice. ® RF Communications Division | 1680 University Avenue | Rochester, NY USA 14610 www.harris.com 1-585-244-5830 assuredcommunications™ Copyright © 2005 Harris Corporation 8/05 DS--244B