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A New Approach to the Realization of a Dual-Band Microstrip Filter With Very Wide Upper Stopband

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2 Author(s)
Cheng, K.-K.M. ; Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong ; Law, C.

This paper presents the design of a new dual-band filter with very wide upper stopband. The proposed circuit offers a simple and compact structure with low insertion loss. Spurious suppression is achieved by using specially designed coupling and resonator sections. Moreover, a systematic analysis is applied to the proposed topology with closed-form design equations derived. For verification purposes, the measured performance of a microstrip filter operating at 1 and 2 GHz is shown with stopband attenuation of greater than 20 dB over the frequency range from 2.5 to 8.0 GHz.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:56 ,  Issue: 6 )

Date of Publication:

June 2008

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