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High Selectivity Wideband Bandpass Filter Based on Transversal Signal-Interaction Concepts and T-Shaped Structure

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4 Author(s)
Wenjie Feng ; Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing, China ; Wenquan Che ; Suyang Shi ; Quan Xue

A high selectivity wideband bandpass filter (BPF) based on transversal signal-interaction concepts and T-shaped structure is proposed in this letter. Two transmission paths with two open coupled lines and a T-shaped structure are used to realize signal transmission from Port 1 to Port 2. A three-order passband with two transmission zeros can be achieved in the proposed filter. One prototype with 3-dB fractional bandwidth of 36.3% (3.3-4.75 GHz) is fabricated for demonstration. Good agreement is observed between simulated and measured performances.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:22 ,  Issue: 11 )