Vol. 80

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2018-11-20

Compact Microstrip BPF with High Selectivity Using Extended Tapped Lines

By Yi-Qiang Gao, Wei Shen, Liang Wu, and Xiao-Wei Sun
Progress In Electromagnetics Research Letters, Vol. 80, 39-46, 2018
doi:10.2528/PIERL18081303

Abstract

This paper proposes a compact microstrip bandpass filter (BPF) with high selectivity. A folded stepped-impedance resonator (SIR) of which the high impedance part is realized by a coplanar waveguide on the ground layer is introduced to the filter design for miniaturization. Furthermore, source-load coupling is implemented by extended tapped lines (ETLs). High selectivity with four transmission zeros (TZs) can be achieved. The analysis of the filter is presented based on atransmission line circuit model and even- and odd-mode analysis method. An experimental filter with the size of 0.15λg*0.13λg (where λg is the guide wave-length at the center frequency) is designed to validate our methods.

Citation


Yi-Qiang Gao, Wei Shen, Liang Wu, and Xiao-Wei Sun, "Compact Microstrip BPF with High Selectivity Using Extended Tapped Lines," Progress In Electromagnetics Research Letters, Vol. 80, 39-46, 2018.
doi:10.2528/PIERL18081303
http://jpier.org/PIERL/pier.php?paper=18081303

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