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A COMPACT WIDE BANDPASS FILTER WITH GOOD SELECTIVELY

By M. Shen, X. Lin, J. Ai, C. Tang, and W. T. Joines

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Abstract:
A compact Ku-band bandpass filter (BPF) with wide pass-band, compact size and high selectively is presented. The presented BPF is composed of two quarter-wavelength resonators and a dual-mode resonator, resulting in a compact circuit size. The transmission zeros (TZs) located at the lower and upper stopband are achieved by the mixed electromagnetic (EM) coupling and dual-mode resonator, respectively, resulting in a high frequency selectively. The measured results show minimum in-band insertion loss, fractional bandwidth and variation of group delay to be 0.9 dB, 36.2% and 0.12 ns, respectively. Also, the stopband suppression is greater than 28 dB from 5 to 10.3 GHz and 30 dB from 19.5 to 29.5 GHz. The effective circuit size of the filter is 8.43×2.28 mm² (0.63 λg ×0.17 λg, where λg is the guide wavelength of 15.1 GHz.)

Citation:
M. Shen, X. Lin, J. Ai, C. Tang, and W. T. Joines, "A Compact Wide Bandpass Filter with Good Selectively," Progress In Electromagnetics Research C, Vol. 77, 49-56, 2017.
doi:10.2528/PIERC17053103
http://www.jpier.org/pierc/pier.php?paper=17053103

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