Compact balanced UWB bandpass filter with one narrow notched band

Publication Type:
Journal Article
Microwave and Optical Technology Letters, 2014, 56 (7), pp. 1626 - 1629
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A compact balanced ultra-wideband bandpass filter (BPF) with one sharply notched band is presented in this article. The proposed BPF based on microstrip-to-slotline transition obtains favorable uniform differential-mode response and good common-mode suppression. Moreover, one narrow notched band with a 3 dB bandwidth of 6.8% is realized by introducing one coupled half-wavelength resonator. The fabricated filter has a more than 25% size reduction compared to the designs reported in open literature. The predicted results are compared with measured ones and good agreement is achieved. Copyright © 2014 Wiley Periodicals, Inc.
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