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. 29, 2011
Filed:
Jul. 24, 2008
Sheng-fuh Chang, Min-Hsiung Township, Chiayi County, TW;
Yi-ming Chen, Hsinchu, TW;
Cheng-yu Chou, Taipei, TW;
Sheng-Fuh Chang, Min-Hsiung Township, Chiayi County, TW;
Yi-Ming Chen, Hsinchu, TW;
Cheng-Yu Chou, Taipei, TW;
National Chung Cheng University, Chia-Yi, TW;
Abstract
The present invention discloses a switchable frequency response microwave filter, which uses voltage-controlled varactors to attain the separation or combination of the odd mode and even mode of signals in a dual-mode ring resonator to realize a bandpass or bandstop function and then controls the frequency response of the output filtered signals. Further, the present invention integrates different circuit architectures having bandpass and bandstop functions into a single circuit to reduce the complexity of the circuit.