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:
Sep. 02, 2008
Filed:
Nov. 10, 2003
Tadashi Oshiyama, Tomioka, JP;
Hirotoshi Mizuno, Tomioka, JP;
Yusuke Suzuki, Tomioka, JP;
Yokowo Co., Ltd., Tokyo, JP;
Abstract
The present invention provides an antenna for multiple bands employing a single antenna element, capable of operating in multiple frequency bands, and ideal for size reduction purposes. One end A of an antenna elementis electrically connected to a feeding pointand intermediate points B and C and the other end thereof is electrically connected via switches SWb, SWc, and SWd to a ground conductor. The electrical lengths of the antenna elementfrom the terminal to the intermediate points B and C plus connection lines from these points via the switches SWb and SWc to the ground conductor 14 and the electrical length from the one end A to the other end D plus a connection line from the other end via the switch SWd to the ground conductorare set to be capable of resonating different desired frequency bands. By closing one of the switches SWb, SWc, and SWd, one of the desired frequencies can be selected and the antenna can resonate with that frequency. Thus, the antenna employing the single antenna elementcan operate in multiple frequency bands.