The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 2002
Filed:
Dec. 21, 2000
Patrick D. McKivergan, Scotts Valley, CA (US);
Rangestar Wireless, Inc., Aptos, CA (US);
Abstract
An antenna assembly for a wireless communication device. The antenna assembly is mountable onto a printed wiring board (PWB) and consists of first and second conducting elements. The first conducting element is capacitively coupled via a matchable shunt and operatively connected to a ground plane of the PWB, while the second conducting element is operatively connected to the ground plane of the PWB at two locations. The first and second conducting elements are operatively connected to each other by a tunable bridge capacitor and together form two orthogonal magnetic dipole elements. The antenna assembly provides substantially circular hemispherical polarization over a wide range of amplitudes by virtue of the geometry and orientation of the two magnetic dipole elements which are fed with equal amplitude, but in-phase quadrature. The matchable shunt acts as an impedance transformer to yield a low voltage standing wave ratio (VSWR) of less than two-to-one at the operating frequency. The antenna assembly includes a single feed point which permits RF energy to be distributed to both conducting elements without a power splitter or phase shifter(s).