Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-Slot

In this paper, a reconfigurable wideband filtering balun with tunable dual-notched bands is proposed, using coplanar waveguide (CPW)-to-slot transitions and varactor-loaded shorted-slots. The wideband filtering balun consists of a triple-mode slot resonator, two CPW-to-slot transitions, and a CPW sh...

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Main Authors: Jie Zhou, Huizhen Jenny Qian, Jiyuan Ren, Xun Luo
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Access
Subjects:
Online Access:https://ieeexplore.ieee.org/document/8668398/
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spelling doaj-75f3e98cfae14bab8a0bdaa5d2aafacb2021-03-29T22:19:04ZengIEEEIEEE Access2169-35362019-01-017367613677110.1109/ACCESS.2019.29056838668398Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-SlotJie Zhou0Huizhen Jenny Qian1Jiyuan Ren2Xun Luo3https://orcid.org/0000-0002-1318-9418Center for Integrated Circuits, University of Electronic Science and Technology of China, Chengdu, ChinaCenter for Integrated Circuits, University of Electronic Science and Technology of China, Chengdu, ChinaCenter for Integrated Circuits, University of Electronic Science and Technology of China, Chengdu, ChinaCenter for Integrated Circuits, University of Electronic Science and Technology of China, Chengdu, ChinaIn this paper, a reconfigurable wideband filtering balun with tunable dual-notched bands is proposed, using coplanar waveguide (CPW)-to-slot transitions and varactor-loaded shorted-slots. The wideband filtering balun consists of a triple-mode slot resonator, two CPW-to-slot transitions, and a CPW short-stub. Three transmission poles are allocated by the triple-mode slot resonator to achieve the wideband operation. To further improve the amplitude- and phase-imbalance responses, two CPW-to-slot transitions are used. Besides, the CPW short-stub is introduced to enhance the passband selectivity. Then, based on the proposed wideband filtering balun, a reconfigurable balun with tunable dual-notched bands is achieved by introducing two pairs of varactor-loaded shorted-slots. The measured results show that the frequency tuning ranges of the dual-notched bands are 1.28-1.58 GHz (21.6%) and 1.89-2.41 GHz (24.2%) with 15-dB rejection, respectively. The proposed filtering balun shows the advantages of wide fractional bandwidth, high selectivity, low insertion loss, and tunable notched band operation.https://ieeexplore.ieee.org/document/8668398/Baluncoplanar waveguide (CPW)notchreconfigurableslotwideband
collection DOAJ
language English
format Article
sources DOAJ
author Jie Zhou
Huizhen Jenny Qian
Jiyuan Ren
Xun Luo
spellingShingle Jie Zhou
Huizhen Jenny Qian
Jiyuan Ren
Xun Luo
Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-Slot
IEEE Access
Balun
coplanar waveguide (CPW)
notch
reconfigurable
slot
wideband
author_facet Jie Zhou
Huizhen Jenny Qian
Jiyuan Ren
Xun Luo
author_sort Jie Zhou
title Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-Slot
title_short Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-Slot
title_full Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-Slot
title_fullStr Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-Slot
title_full_unstemmed Reconfigurable Wideband Filtering Balun With Tunable Dual-Notched Bands Using CPW-to-Slot Transition and Varactor-Loaded Shorted-Slot
title_sort reconfigurable wideband filtering balun with tunable dual-notched bands using cpw-to-slot transition and varactor-loaded shorted-slot
publisher IEEE
series IEEE Access
issn 2169-3536
publishDate 2019-01-01
description In this paper, a reconfigurable wideband filtering balun with tunable dual-notched bands is proposed, using coplanar waveguide (CPW)-to-slot transitions and varactor-loaded shorted-slots. The wideband filtering balun consists of a triple-mode slot resonator, two CPW-to-slot transitions, and a CPW short-stub. Three transmission poles are allocated by the triple-mode slot resonator to achieve the wideband operation. To further improve the amplitude- and phase-imbalance responses, two CPW-to-slot transitions are used. Besides, the CPW short-stub is introduced to enhance the passband selectivity. Then, based on the proposed wideband filtering balun, a reconfigurable balun with tunable dual-notched bands is achieved by introducing two pairs of varactor-loaded shorted-slots. The measured results show that the frequency tuning ranges of the dual-notched bands are 1.28-1.58 GHz (21.6%) and 1.89-2.41 GHz (24.2%) with 15-dB rejection, respectively. The proposed filtering balun shows the advantages of wide fractional bandwidth, high selectivity, low insertion loss, and tunable notched band operation.
topic Balun
coplanar waveguide (CPW)
notch
reconfigurable
slot
wideband
url https://ieeexplore.ieee.org/document/8668398/
work_keys_str_mv AT jiezhou reconfigurablewidebandfilteringbalunwithtunabledualnotchedbandsusingcpwtoslottransitionandvaractorloadedshortedslot
AT huizhenjennyqian reconfigurablewidebandfilteringbalunwithtunabledualnotchedbandsusingcpwtoslottransitionandvaractorloadedshortedslot
AT jiyuanren reconfigurablewidebandfilteringbalunwithtunabledualnotchedbandsusingcpwtoslottransitionandvaractorloadedshortedslot
AT xunluo reconfigurablewidebandfilteringbalunwithtunabledualnotchedbandsusingcpwtoslottransitionandvaractorloadedshortedslot
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