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A high-selectivity dual-band bandpass filter using a modified triple-mode resonator with two paralleled stubs is proposed. By adding a coplanar waveguide (CPW) structure into a microstrip dual-mode stepped-impedance resonator (SIR), the triple-mode resonator is achieved without significantly increasing the overall circuit size. Five transmission zeros are generated in the desired band so as to improve...
The objective of this paper is to study the stepped-impedance hairpin unit towards realizing three transmission zeros while applying this unit to design of multi order low-pass filters with widened and deepened upper-stopband. A synthesis method is then presented to design of two Chebyshev-function low-pass filters. Finally, two low-pass filters of 3rd - and 5th -order are designed and fabricated...
In the comment of Chiou and Kuo regarding the above paper, they investigate where the fourth resonance of the proposed stub-loaded multiple mode resonator (MMR) and the transmission zero at the upper pass-band edge come from. The following is the authors reply to their comment.
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