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:
May. 22, 2012
Filed:
Jun. 16, 2010
Tszshing Cheung, Kawasaki, JP;
Tszshing Cheung, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
When a direct-current voltage is applied from a power supply, a signal line generates a standing wave having the ¾ wavelength where a starting end of the signal line connected to the power supply is used as a node and a terminating end is used as an antinode. Strips are connected to a ground layer through switches, respectively. The switches switch connection and non-connection of the strips and the ground layer, under the control from a switch controller. By switching the connection and non-connection of the switches, the distance between the signal line and the ground layer is pseudo adjusted and the effective permittivity in a transmission line unit changes. Therefore, the frequency of the standing wave can be adjusted.