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:
Jan. 16, 2007
Filed:
Oct. 25, 2002
Atsushi Yamada, Tenri, JP;
Yoshihisa Amano, Nara, JP;
Yoshinori Motouchi, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Configuration of a connection between an even-harmonic mixer and a filter is simplified, thereby enabling size reduction. An even-harmonic mixer and a high-frequency bandpass filter are connected to each other via a transmission line, thereby forming a filter-integrated even-harmonic mixer. The length of the transmission line is set so that impedance on the transmission line side as viewed from a connection point between the even-harmonic mixer and the transmission line is approximately 0 for a frequency fof a local oscillation signal. This allows elimination of an open stub which is used in a conventional even-harmonic mixer and of which the line length to provide equivalent grounding for the frequency fis about 1 mm. Thus, the connection portion between the even-harmonic mixer and the high-frequency bandpass filter is simplified and a compact circuit layout for the filter-integrated even-harmonic mixer is obtainable.