![]() It too, mounts in the nose radome, but is less than half the width of the N9 Series. In this case, the N1 antenna satisfies this need perfectly. Some users prefer this concept but require glide slope. In addition to excellent localizer and glide slope patterns, many users utilize the localizer output for forward-looking VOR as well. The N9 Series is a balanced bent-back dipole antenna, which renders it immune from the nose radar motion. When dual receiver installations are used, appropriate couplers are available for dual localizer and dual glide slope receiver operation. The localizer is an antenna system comprised of a VHF transmitter which uses the same frequency range as a VOR transmitter (108,10 111,95 MHz), however the frequencies of the localizer are only placed on odd decimals, with a channel separation of 50 kHz. Simultaneous localizer and glide slope signals will be provided for single receiver installations. The N9 Series has been designed to conform to radome curvatures providing minimum installation area and access for radar installations. In some cases, reinforcing ribs provide structural rigidity and mounting adaptability to the bulkhead for mechanical attachment and electrical grounding to the airframe. The localizer antenna broadcasts two lobes down the length of the runway for a few miles (typically 18 nm, but some airports like LAX have a much longer serviceable distance). The antenna is designed with the radiating elements attached to a single curved dielectric window to provide support. The design incorporates common radiating elements into a single monolithic structure for mounting on a bulkhead within a radome or to the radome directly. ![]()
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