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. 09, 2009
Filed:
Mar. 16, 2005
Yoshiyuki Murakami, Tottori-ken, JP;
Hiroyuki Tai, Tottori-ken, JP;
Shigeru Kemmochi, Saitama-ken, JP;
Yoshiyuki Murakami, Tottori-ken, JP;
Hiroyuki Tai, Tottori-ken, JP;
Shigeru Kemmochi, Saitama-ken, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A high-frequency circuit for branching high-frequency signals for pluralities of communications systems of different frequencies, which comprises a lowpass filter circuit disposed between first and second ports and/or a highpass filter circuit disposed between the first port and a fourth port; and a matching circuit and a bandpass filter circuit disposed between the first port and a third port; the lowpass filter circuit, the highpass filter circuit and the matching circuit comprising capacitance elements and inductance elements; the bandpass filter circuit being a SAW filter; and the passband fof the lowpass filter circuit, the passband fof the bandpass filter circuit, and the passband fof the highpass filter circuit meeting the condition of f<f<f