Antenna apparatus, method of manufacturing same and method of de

Details Antenna apparatus, method of manufacturing same and method of de Antenna apparatus, method of manufacturing same and method of de

1996-09-06

1998-08-25

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Microstrip

343846, H01Q 138

Patent

active

057987343

ABSTRACT:
An antenna apparatus, a method of manufacturing the same, and a method of designing the same, are provided. A first dielectric layer, first dielectric film, second dielectric layer and second dielectric film are laminated on a flat metal plate in the mentioned order. A radiation element fed through a feeding line is arranged below another radiation element that is not fed through the feeding line. The feeding line forms, along its overall length, a microstrip line having the dielectric layer sandwiched by the feeding line and the flat conductive plate, resulting in no model change from the microstrip line to a triplate line or vice versa, with reduced feeding loss. The thickness of the dielectric layer is so set as to be sufficiently small compared with the used wavelength, to thereby suppress the radiation from discontinuities lying on the microstrip line constituted of the feeding line and flat conductive plate. This eliminates the need for a metal shield plate to prevent unnecessary radiation from the feeding line.

REFERENCES:
patent: 4827271 (1989-05-01), Berneking
patent: 5166693 (1992-11-01), Nishikawa et al.
patent: 5243353 (1993-09-01), Nakahara et al.
patent: 5382959 (1995-01-01), Pett et al.
patent: 5481272 (1996-01-01), Yarsunas
patent: 5619217 (1997-04-01), Mailandt et al.

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