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Method of determining feed positions in coupled half-wavelength stepped impedance resonator bandpass filter

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6 Author(s)
Ma, R. ; Coll. of Phys. & Electron. Eng., Shanxi Univ., Taiyuan ; Han, G. ; Chen, X. ; Li, L.
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In this study, the input impedance of coupled half wavelength stepped impedance resonator bandpass filter with directly tapped feed structure is deduced, and the method of determining the feed positions in the filter is proposed by using the concept of impedance matching. Two microstrip bandpass filter examples are described for demonstrating the procedure. The simulated and measured results indicate that the proposed method is an effective way for designing similar filters.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:3 ,  Issue: 5 )