DMN25-2 Antenna, Aluminum Body, C Female Connector, 329 to 335.3 MHz, 50 Ohm, Symmetrical

Overview

The N25 series of glide slope antennas employ a grounded, center-fed loop as the radiating element. The resulting radiation patterns are symmetrical. The N25-2 is a dual connector version, which incorporates a hybrid and adds a direct current path to ground for lightning protection. This circuitry effectively isolates the two associated receiving systems providing protection against disablement of both systems in the event of failure in one system. The radiation pattern associated with each N25-2 antenna port is identical so that no coupler drop-out problem during automatic landing occurs. They are suitable for mounting either externally or within a nose radome. The inherent 180 deg pattern beam may be modified slightly by the geometry surrounding the installation. The N25 antennas are recommended for installations near radar dish installations because the antenna’s (glide slope) sensitivity is relatively unaffected by dish motion.