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A Proposed Standard Dummy Antenna for Testing Aircraft-Radio Transmitters

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1 Author(s)
Stewart, Chandler ; Headquarters, Air Technical Service Command, Wright Field, Dayton, Ohio

A new type of dummy antenna employing a 35-foot roll of coaxial cable and a power indicator is described. It roughly simulates the impedance characteristics of an actual aircraft antenna, which is used over the range of 2 to 30 megacycles. Its impedance characteristics are not appreciably affected by mechanical shock, humidity, ageing, etc. Power measurements can be made with it over a wide impedance range with a single indicating instrument. The impedance presented to the transmitter terminals is unaffected by lead geometry, ammeter impedances, etc. Its power-dissipating capability is limited by the flow temperature of the cable dielectric, and is of the order of 125 watts.

Published in:

Proceedings of the IRE  (Volume:33 ,  Issue: 11 )