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Miniaturized Dual-Mode Ring Resonator Bandpass Filter With Microstrip-to-CPW Broadside-Coupled Structure

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3 Author(s)
Yi-Chyun Chiou ; Nat. Chiao Tung Univ., Hsinchu ; Jen-Tsai Kuo ; Juo-Shiuan Wu

A microstrip-to-coplanar waveguide broadside-coupled section is used to replace a 34-section of the conventional dual-mode 1-ring resonator filter for circuit area miniaturization. It is believed that it is a new idea to incorporate the broadside-coupled section into a ring resonator filter for size reduction. For design purpose, some important characteristics of the broadside-coupled lines are investigated. In experiments, two realized circuits show only 19.4% of the area of a uniform ring. Measured responses show good agreement with simulation.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:18 ,  Issue: 2 )