Ultra-Wideband Bandpass Filter Based on a Multi-Stub Loaded Loop Resonator
2019 ◽
Vol 28
(13)
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pp. 1920008
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A multi-stub loaded loop resonator (MSLLR) is proposed in this paper, which exhibits five main resonant modes of interest. Then, an ultra-wideband (UWB) bandpass filter is developed on it. Through direct source/load coupling, two transmission zeros can be created at both sides of the passband of the filter, which improves its frequency selectivity. The measured results of the fabricated filter show that its bandwidth can cover the UWB frequency range and the return loss in the passband is greater than 12.9[Formula: see text]dB. Frequency selectivity is improved due to two transmission zeros at both sides of the passband. Group delay variation is less than 0.48[Formula: see text]ns in the passband, which is relatively flat.
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2017 ◽
Vol 9
(10)
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pp. 1931-1936
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2018 ◽
Vol 10
(10)
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pp. 1107-1112
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Design and Analysis of Interdigital Coupled Ultra Wideband Bandpass Filter using Multimode Resonator
2019 ◽
Vol 9
(1)
◽
pp. 1456-1459
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2018 ◽
Vol 7
(2.8)
◽
pp. 529
◽
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