Decoupling means for monopole antennas and the like

Details Decoupling means for monopole antennas and the like Decoupling means for monopole antennas and the like

1980-08-22

1982-07-27

Moore, David K.

Communications: radio wave antennas

Antennas

With grounding structure

343830, H01Q 148

Patent

active

043420370

ABSTRACT:
A monopole antenna or the like including a sleeve antenna and a stub antenna having means for decoupling the antenna from surrounding electrically conductive elements. Such elements may consist, for example, of the conductive skin of an aircraft and, typically, of other antennas mounted on this skin, or they may comprise conductive portions of a ship. In order to provide the decoupling, a radial transmission line is disposed at the base of the antenna and concentric with the coaxial transmission line used to excite the antenna. The radial transmission line includes an upper and a lower electrically conductive plate, each having a small central opening and means for electrically interconnecting the plates about the opening. The antenna may be fed by a coaxial transmission line extending through the conductive element and the central opening. The inner conductor of the coaxial transmission line may extend beyond the radial transmission line to form a monopole antenna. Alternatively, the coaxial line may extend through the radial line to form a sleeve antenna with an extending monopole structure.

REFERENCES:
patent: 2184729 (1939-12-01), Bailey
patent: 2239909 (1941-04-01), Bushbeck et al.
patent: 2297512 (1942-09-01), von Baeyer
patent: 2297513 (1942-09-01), von Baeyer
patent: 2359620 (1944-10-01), Carter
patent: 2452202 (1948-10-01), Lindenblad
patent: 3054107 (1962-09-01), Engel et al.
patent: 3293646 (1966-12-01), Brueckmann

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