Wideband VHF/UHF radio antenna with quarter-wave transformer

Details Wideband VHF/UHF radio antenna with quarter-wave transformer Wideband VHF/UHF radio antenna with quarter-wave transformer

1984-09-24

1987-06-16

Lieberman, Eli

Communications: radio wave antennas

Antennas

Fractional, multiple, or full wave length linear type

343864, H01Q 150, H01Q 930

Patent

active

046739491

ABSTRACT:
A radio antenna which operates over a broad frequency band, comprising a half-wave antenna tuned to a frequency beyond one cut-off frequency of the desired frequency band and a quarter-wave transformer tuned to a frequency beyond the other cut-off frequency at the other end of said band. The quarter-wave transformer acts as an impedance compensation device by canceling the reactive components of the half-wave antenna such novel reactive cancellation technique provides broadband performance while maintaining the antenna's gain and impedance characteristics.

REFERENCES:
patent: 2205874 (1940-06-01), Buschbeck
patent: 2421593 (1947-06-01), Bishop
patent: 2451258 (1948-10-01), Trevor
patent: 3798654 (1974-03-01), Martino et al.
patent: 4494122 (1985-01-01), Garay et al.
patent: 4509056 (1985-04-01), Ploussios

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