Compact Tunable Dual/tri-Band Bandpass Filters with Multiple Zeros
IET Microwaves Antennas & Propagation（2019）
Key words
band-pass filters,resonator filters,varactors,common external coupling line,dual-mode resonator,varactors,quad-mode resonator,multiband BPF,dual-passband BPF,single passband BPF,compact tunable dual-tri-band bandpass filters,odd-even mode,constant absolute bandwidth,multipath coupling structure,transmission zeroes
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