Patch antenna including reactive loading

Details Patch antenna including reactive loading Patch antenna including reactive loading

1995-05-04

1997-07-29

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Microstrip

343702, 343846, H01Q 138

Patent

active

056525958

ABSTRACT:
An antenna (10) is set forth which may be used in, among other devices, a communications device, particularly a portable communications device. The antenna (10) includes a dielectric substrate (25) having first and second opposed sides. A ground plane (20) is disposed at the second side of the dielectric substrate and is in electrical contact therewith. An electrically conductive patch element (30) is supported by the first side of the dielectric substrate (25). The patch element (30) includes a feed point (40) at which RF energy is supplied to or received from the patch element (30). A plated aperture (70) is disposed through and electrically connected to the patch element (30) and extends into the dielectric substrate (25). The plated aperture (70) is electrically insulated from the ground plane (20) and offset from the feed point (40). The addition of the plated aperture (70) to the antenna (10) increases the electrical length of the antenna through reactive loading. The antenna thus resonates at a frequency that is lower than the same antenna configuration without the plated aperture.

REFERENCES:
patent: 4379296 (1983-04-01), Farrar et al.
patent: 4590478 (1986-05-01), Powers et al.
patent: 5003318 (1991-03-01), Berneking et al.
patent: 5227749 (1993-07-01), Ragmenet et al.
patent: 5483246 (1996-01-01), Barnett et al.

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