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:
Dec. 24, 2002
Filed:
Jul. 17, 2001
Kiyotada Yokogi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A diversity antenna apparatus and method adaptable for use with communication equipment is provided which can assure an acceptable transmission and/or reception condition in three principal dimensional (X,Y,Z) directions. The diversity antenna apparatus may comprise a plurality of antennae for transmitting and/or receiving a circularly polarized wave and an antenna selection circuit which selects one of the antennae for transmission and/or reception based on information representative of reception levels of the antennae. A first group of the antennae may provide a first substantially semispherical radiation pattern and a second group of the antennae may provide a second substantially semispherical radiation pattern such that the first and second groups of antennae as a whole provide a substantially spherical radiation pattern.