Impedance of Asymmetrically-Fed Trailing-Wire Antennas
BOEING CO RENTON WA TRANSPORT DIV
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The paper considers the impedance of long wires towed by aircraft for low-frequency communications. Experiments using a small helicopter towing wires up to 1850 feet in length are described. The effects of wire slenderness factor la and r-f ohmic resistance on efficiency and input impedance are considered. Particular attention is devoted to the synthesis of a model which can be used to predict the impedance of trailing wires for any wire length and aircraft size. It is concluded that wires several miles long towed by aircraft need not be excited at their centers, but can be conveniently and efficiently driven from the aircraft.
- Electrical and Electronic Equipment