A position marker system used in aircraft certification flights is described. The system consists of a ground-based part, viz, a microwave transmitter and a fan-beam antenna, and an airborne part composed of receiving antenna, a crystal-video receiver, and a processor which interfaces the system to the usual recording equipment. The design of the fan-beam antenna is stressed since the performance of the system depends heavily on it. Some measurement results of the antenna are given. It is shown that the slotted waveguide antenna, fed in the center and used in difference mode, is suitable as a marker beacon for aircraft. For heights less than 1,000 m, the aircraft position can be determined (in one dimension) with an accuracy of a few meters. (Author)
A Slotted Waveguide Antenna as a Marker Beacon for Aircraft
1975
15 pages
Report
No indication
English
Integrated Manufacturing Technology of Slotted Waveguide Antenna
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