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:
Sep. 05, 2006
Filed:
Nov. 02, 2004
Sheng-fuh Chang, Ming-Hsiun, TW;
Shuen-chien Chang, Ming-Hsiun, TW;
Jia-liang Chen, Ming-Hsiun, TW;
Shih-chieh Chen, Ming-Hsiun, TW;
Hung-cheng Chen, Hsinchu, TW;
Shu-fen Tang, Hsinchu, TW;
Albert Chen, Hsinchu, TW;
Sheng-Fuh Chang, Ming-Hsiun, TW;
Shuen-Chien Chang, Ming-Hsiun, TW;
Jia-Liang Chen, Ming-Hsiun, TW;
Shih-Chieh Chen, Ming-Hsiun, TW;
Hung-Cheng Chen, Hsinchu, TW;
Shu-Fen Tang, Hsinchu, TW;
Albert Chen, Hsinchu, TW;
Integrated System Solution Corp., Hsin-Chu, TW;
Sheng-Fuh Chang, Chia-Yi, TW;
Abstract
A dual-band bandpass filter with stepped-impedance resonators uses only one circuit to generate dual-band effect. It adopts the principle of stepped-impedance resonator, which contains a connecting section and two coupling sections. The impedance and electrical length of the connecting section and coupling sections conforms to a selected condition to generate two passbands at desired frequencies. A multi-layer broadside-coupled parallel lines structure may be applied to increase coupling-amount between the parallel lines so that the dual-band bandpass filters have broader bandwidth and less loss.