A slotted waveguide antenna as a marker beacon for aircraft

Report (1975)
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Published Date

01-07-1975

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NLR MP 75027 U

Abstract

This paper presents a description of a position marker system used in aircraft certification flights. The system consists of a ground-based part, viz. a microwave transmitter and a fan-beam antenna, while the airborne part is composed of receiving antenna, a crystal-video receiver and a processor which interfaces the system to the usual recording equipment. Most attention is given to the design of the fan-beam antenna since the performance of the system depends heavily on it. Some measurement results of the antenna are given. For heights less than 1000 m, the aircraft position can be determined (in one dimension) with an accuracy of a few meters.

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