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:
Mar. 23, 2010
Filed:
Dec. 27, 2007
Chia-cheng Chuang, Kaohsiung, TW;
Chia-Cheng Chuang, Kaohsiung, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A filtering circuit and a structure thereof are provided. The filtering circuit includes an input terminal, an output terminal, a resonant circuit, a first coupling portion, and a second coupling portion. The resonant circuit is coupled between the input terminal and the output terminal and includes M resonators which are arranged in sequence. A signal received by the input terminal can be transmitted to the output terminal by the resonant circuit through inter-coupling between adjacent resonators. The first coupling portion and the second coupling portion are respectively coupled to non-adjacent resonators. A part of the signal received by the input terminal is transmitted to the second coupling portion via the first coupling portion through cross-couple. Thereby, sideband interference can be further suppressed.