Means for reducing re-radiation from tall guyed towers located i

Details Means for reducing re-radiation from tall guyed towers located i Means for reducing re-radiation from tall guyed towers located i

1978-11-03

1980-06-10

Lieberman, Eli

Communications: radio wave antennas

Antennas

With support for antenna, reflector or director

H01Q 152

Patent

active

042075769

ABSTRACT:
A method for decreasing radiation from a guy wire located in a strong electromagnetic field is disclosed. The method comprises placing inductive impedances at regular intervals along a guy wire, each interval being less than a half wavelength long. Each inductive impedance is made greater than Z.sub.o but usually less than 5 Z.sub.o where Z.sub.o is the characteristic impedance of the span between inductances. It is shown that induced current distribution in a span between inductances has, say, a negative current in the central portion of the span and positive currents near the two ends of the span. It is this reversal of the direction of the induced current, together with low magnitude, that results in very low re-radiation. In practice the inductive impedances may be constructed by using coils in shunt with guy insulators. In some applications the inductive impedances may take a different form, for example, inductive sleeves or just coils may be used as inductances.

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