Leon G Lin

US Patent:

61883719, Feb 13, 2001

Filed:

Jul 21, 1999

Appl. No.:

9/358091

Inventors:

Kevin Li - San Diego CA
Brian Louis Wixom - San Diego CA
Leon Chia-Liang Lin - Union City CA
Thomas Stanley Seay - Solana Beach CA

Assignee:

Quake Wireless, Inc. - San Diego CA

International Classification:

H01Q 1112

US Classification:

343866

Abstract:

A low-profile antenna includes a ground-plane element defining a ground plane and an elongated radiator element configured and disposed in relation to the ground plane to define a vertical loop when the ground plane is horizontally disposed. A substantial broad segment of the radiator element is parallel to the ground plane. One end of the radiator element is connected to the ground-plane element and another end of the radiator element having spaced-apart legs with feet is capacitively coupled to the ground-plane element by dielectric spacing elements that are disposed between the feet of the radiator element and the ground-plane element. A conductive-material layer contacts the feet between the feet and the dielectric spacing element. An exposed portion of the conductive-material layer that extends from beneath the feet of the radiator element includes removal tabs for enabling the capacitive coupling to be adjusted by removing at least some of the exposed tabs. The adjustable capacitive coupling and the dimensions and configuration of the radiator element are such as to enable the radiator element to resonate within an adjustable band of frequencies within a predetermined range of frequencies.