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:
Oct. 09, 2007
Filed:
Oct. 25, 2005
Eiichi Hase, Tokyo, JP;
Eiichi Hase, Tokyo, JP;
Hitachi Kousai Electric Inc., Tokyo, JP;
Abstract
A high frequency switch circuit device includes: at least one distributed element of at least one transmission line; at least two lumped elements of at least one resistor and at least one capacitor; at least one semiconductor device; at least one input terminal; at least two output terminals; and another transmission line, having an open end or a short-circuited end, connected to the input terminal. A total length of the input terminal and said another transmission line is set to be about an integer times λ/2 in case the transmission line has the open end and about an integer times (λ/4+λ/2) in case the transmission line has the short-circuited end. One of the output terminals is used as an input port to which a signal is inputted, and another one of the output terminals is used as an output port from which a signal is outputted.