Vertical antenna with stub cancellation means

Details Vertical antenna with stub cancellation means Vertical antenna with stub cancellation means

1979-02-21

1980-06-24

Moore, David K.

Communications: radio wave antennas

Antennas

Fractional, multiple, or full wave length linear type

343831, 343901, H01Q 916

Patent

active

042097908

ABSTRACT:
Vertical antenna including a vertical radiator having a height of three-half wavelengths, a cancellation stub electrically connected to the vertical radiator three-quarters wavelength upward from a feed point at the base of the vertical radiator and extending downwardly one-quarter wavelength and upwardly one-half wavelength from the electrical connecting point of the vertical radiator, an insulation member mounted in a mounting post and supporting the base of the vertical radiator, quarter wavelength radials extending outwardly in the same plane and at right angles to the vertical radiator from the mounting post, and a transmission line connected between the feed point at the base of the vertical radiator and the radials. The gain of the vertical antenna is theoretically 3.2 db over a half wavelength dipole antenna. The vertical antenna is particularly lended to operation in the VHF spectrum and above.

REFERENCES:
patent: 2425585 (1947-08-01), Wheeler
patent: 3172109 (1965-03-01), Senrui

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