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:
Jul. 10, 2007
Filed:
Oct. 27, 2003
Kazuhiro Hagiwara, Saitama-ken, JP;
Shigeru Kemmochi, Saitama-ken, JP;
Keisuke Fukamachi, Saitama-ken, JP;
Mitsuhiro Watanabe, Meerbusch, DE;
Tsuyoshi Taketa, Tottori-ken, JP;
Yoshiyuki Murakami, Tottori-ken, JP;
Kazuhiro Hagiwara, Saitama-ken, JP;
Shigeru Kemmochi, Saitama-ken, JP;
Keisuke Fukamachi, Saitama-ken, JP;
Mitsuhiro Watanabe, Meerbusch, DE;
Tsuyoshi Taketa, Tottori-ken, JP;
Yoshiyuki Murakami, Tottori-ken, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
An unbalanced-balanced multiband filter module comprising three high-frequency switches each comprising a switching element, and two unbalanced-balanced bandpass filters having different transmitting frequency bands, a first high-frequency switch being connected to an unbalanced port of the module, an unbalanced port of the first unbalanced-balanced bandpass filter, and an unbalanced port of the second unbalanced-balanced bandpass filter; a second high-frequency switch being connected to a first balanced port of the module, a first balanced port of the first unbalanced-balanced bandpass filter, and a first balanced port of the second unbalanced-balanced bandpass filter; a third high-frequency switch being connected to a second balanced port of the module, a second balanced port of the first unbalanced-balanced bandpass filter, and a second balanced port of the second unbalanced-balanced bandpass filter; and the first to third high-frequency switches being switched depending on a passing high-frequency signal, whereby a high-frequency signal input into an unbalanced port of the module is output from the first and second balanced ports, or a high-frequency signal input into the first and second balanced ports is output from an unbalanced port of the module.