Communications: radio wave antennas – Antennas – Plural separate diverse type
Patent
1988-01-25
1989-02-28
Sikes, William L.
Communications: radio wave antennas
Antennas
Plural separate diverse type
343728, 343729, 343855, H01Q 2100
Patent
active
048090093
ABSTRACT:
A resonant antenna suitable for transmission and for reception over a broad range of frequencies combines electric and magnetic multipoles generated by linear and loop elements respectively. The minimum requirement is one electric and one magnetic dipole and one electric and magnetic quadrupole. The electric elements are driven in time quadrature with the magnetic elements. The elements of the minimum requirement lie in the same plane and along the same axis. The minimum number of elements for a free standing antenna is three loops and three dipoles. Maximum transmission and reception occur only in the same direction along the axis. The size of the antenna is reduced by introducing a ground conductor or plane along the antenna axis and eliminating the half elements on one side thereof and is further reduced by introducing a second ground plane normal to the first at the midpoint of its length and eliminating the quarter elements on one side.
REFERENCES:
patent: 2297427 (1942-09-01), Neidhardt
patent: 2421032 (1947-05-01), Marchand
patent: 2953782 (1960-09-01), Byatt
patent: 3434145 (1969-03-01), Wells
patent: 4148036 (1979-04-01), Miller
Grimes Craig A.
Grimes Dale M.
Ingersoll Buchanan
Le Hoang-anh
Sikes William L.
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