Compact wideband microstrip bandpass filter with wide upper stopband based on coupled-stub loaded resonator
作者： Zhi-peng Li , Tao Su , Chang-hong Liang
DOI: 10.1002/MMCE.20831
关键词:
摘要: A novel wideband microstrip bandpass filter BPF based on a coupled-stub loaded resonator CSLR is presented in this article. The constructed by attaching one short-circuited parallel coupled line PCML shunt to high impedance line. bandwidth can be conveniently controlled via reasonable adjusting of the PCML. Moreover, new defected structures DMSs introduced functions as means positions transmission zeros, created resonant mode and zero chart are given, indicating that higher modes could suppressed zeros. Finally, validate proposed method, two filters with without centered at 3 GHz dB fractional 87% designed fabricated. measured results show both return losses better than 15.8 dB, while has -19.4 isolation from 1.57 f0 4.23 f0. excellent agreement full-wave electromagnetic simulation results. © 2014 Wiley Periodicals, Inc. Int J RF Microwave CAE 25:122-128, 2015.
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