Communications: radio wave antennas – Antennas – Fractional – multiple – or full wave length linear type
Patent
1984-12-07
1987-02-17
Lieberman, Eli
Communications: radio wave antennas
Antennas
Fractional, multiple, or full wave length linear type
343861, 343864, H01Q 904
Patent
active
046443649
ABSTRACT:
Impedance matching between two conductor transmission lines and conventional antenna designs including a straight antenna element having an effective length of at least one-quarter wavelength in the operating frequency range and a zero impedance at one end is disclosed in which a straight coupling conductor having a length of about one-quarter wavelength in the operating frequency range is mounted in close spaced co-planar relation to such antenna element with one end electrically connected to the zero impedance end of the antenna element. The two conductors of the transmission line are coupled to the antenna element and coupling conductor, respectively, at the interconnected ends thereof and the spacing between the antenna element and the coupling conductor is adjusted along their coextensive lengths to achieve an impedance match at each frequency in the operating frequency range.
REFERENCES:
patent: 1831921 (1931-11-01), Martin
patent: 2124424 (1938-07-01), Leeds
patent: 2166237 (1939-07-01), Cushman et al.
patent: 4259673 (1981-03-01), Guretzky
Thurnburg, "Multiband J Antenna", Ham Radio, Jul. 1978, pp. 74-76.
The ARRL Antenna Book, published by the American Radio Relay League, Newington, Conn., 14th Edition, 1983, pp. 11-24.
Freiburger Thomas M.
Lieberman Eli
Wimer Michael C.
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