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:
Jun. 29, 2004
Filed:
Sep. 26, 2002
Masayoshi Aikawa, Kanagawa, JP;
Eisuke Nishiyama, Saga, JP;
Takayuki Tanaka, Saga, JP;
Fumio Asamura, Saitama, JP;
Takeo Oita, Saitama, JP;
Other;
Abstract
A planar circuit has a substrate, a planar circuit conductor disposed on a first main surface of the substrate, a ground conductor disposed on a second main surface of the substrate for creating a high frequency resonator based on an electromagnetic wave field in cooperation with the planar circuit conductor, and a circuit element disposed on an opening formed in at least one of the planar circuit conductor and ground conductor to electronically control the electromagnetic wave field. The circuit element may be a variable reactance element such as a varactor diode, or a switching element. The circuit element can variably control the electromagnetic wave field which defines the resonator, so that the resonator can be controlled, for example, to resonate at a variable frequency.