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Liquid Metal Bandwidth-Reconfigurable Antenna
This letter shows how slugs of liquid metal can be used to connect/disconnect large areas of metalization and achieve a radiation performance not possible by using conventional switches. The proposed antenna can switch its operating bandwidth between ultrawideband and narrowband by connecting/discon...
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| Published in: | IEEE antennas and wireless propagation letters 2020-01, Vol.19 (1), p.218-222 |
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| Main Authors: | , , , , , , |
| Format: | Article |
| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-c336t-b13ab1277a47bd6a0b4b37fef41d376e55ed67f02d970d028eea726608d8b8ea3 |
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| cites | cdi_FETCH-LOGICAL-c336t-b13ab1277a47bd6a0b4b37fef41d376e55ed67f02d970d028eea726608d8b8ea3 |
| container_end_page | 222 |
| container_issue | 1 |
| container_start_page | 218 |
| container_title | IEEE antennas and wireless propagation letters |
| container_volume | 19 |
| creator | Alqurashi, Khaled Yahya Kelly, James R. Wang, Zhengpeng Crean, Carol Mittra, Raj Khalily, Mohsen Gao, Yue |
| description | This letter shows how slugs of liquid metal can be used to connect/disconnect large areas of metalization and achieve a radiation performance not possible by using conventional switches. The proposed antenna can switch its operating bandwidth between ultrawideband and narrowband by connecting/disconnecting the ground plane for the feedline from that of the radiator. This could be achieved by using conventional semiconductor switches. However, such switches provide point-like contacts. Consequently, there are gaps in electrical contact between the switches. Surface currents, flowing around these gaps, lead to significant back radiation. In this letter, the slugs of a liquid metal are used to completely fill the gaps. This significantly reduces the back radiation, increases the bore-sight gain, and produces a pattern identical to that of a conventional microstrip patch antenna. Specifically, the realized gain and total efficiency are increased by 2 dBi and 24%, respectively. The antenna has potential applications in wireless systems employing cognitive radio (CR) and spectrum aggregation. |
| doi_str_mv | 10.1109/LAWP.2019.2959879 |
| format | article |
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The proposed antenna can switch its operating bandwidth between ultrawideband and narrowband by connecting/disconnecting the ground plane for the feedline from that of the radiator. This could be achieved by using conventional semiconductor switches. However, such switches provide point-like contacts. Consequently, there are gaps in electrical contact between the switches. Surface currents, flowing around these gaps, lead to significant back radiation. In this letter, the slugs of a liquid metal are used to completely fill the gaps. This significantly reduces the back radiation, increases the bore-sight gain, and produces a pattern identical to that of a conventional microstrip patch antenna. Specifically, the realized gain and total efficiency are increased by 2 dBi and 24%, respectively. The antenna has potential applications in wireless systems employing cognitive radio (CR) and spectrum aggregation.</description><identifier>ISSN: 1536-1225</identifier><identifier>EISSN: 1548-5757</identifier><identifier>DOI: 10.1109/LAWP.2019.2959879</identifier><identifier>CODEN: IAWPA7</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Antenna measurements ; Antenna radiation patterns ; Antennas ; Bandwidth reconfiguration ; Bandwidths ; Boresights ; Casting ; Cognitive radio ; cognitive radio (CR) ; Electric contacts ; Ground plane ; liquid metal ; Liquid metals ; Liquids ; Metals ; microstrip antenna ; Microstrip antennas ; monopole antenna ; Narrowband ; Patch antennas ; Radiators ; reconfigurable antennas ; Slugs ; spectrum aggregation ; Switches ; Ultra wideband antennas ; Ultrawideband ; ultrawideband (UWB) antennas</subject><ispartof>IEEE antennas and wireless propagation letters, 2020-01, Vol.19 (1), p.218-222</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2020</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c336t-b13ab1277a47bd6a0b4b37fef41d376e55ed67f02d970d028eea726608d8b8ea3</citedby><cites>FETCH-LOGICAL-c336t-b13ab1277a47bd6a0b4b37fef41d376e55ed67f02d970d028eea726608d8b8ea3</cites><orcidid>0000-0003-0756-7504 ; 0000-0001-6361-5481 ; 0000-0001-6502-9910 ; 0000-0002-1528-6887 ; 0000-0002-0960-2708 ; 0000-0001-7608-5942 ; 0000-0003-1861-5428</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8933056$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,776,780,27900,27901,54770</link.rule.ids></links><search><creatorcontrib>Alqurashi, Khaled Yahya</creatorcontrib><creatorcontrib>Kelly, James R.</creatorcontrib><creatorcontrib>Wang, Zhengpeng</creatorcontrib><creatorcontrib>Crean, Carol</creatorcontrib><creatorcontrib>Mittra, Raj</creatorcontrib><creatorcontrib>Khalily, Mohsen</creatorcontrib><creatorcontrib>Gao, Yue</creatorcontrib><title>Liquid Metal Bandwidth-Reconfigurable Antenna</title><title>IEEE antennas and wireless propagation letters</title><addtitle>LAWP</addtitle><description>This letter shows how slugs of liquid metal can be used to connect/disconnect large areas of metalization and achieve a radiation performance not possible by using conventional switches. The proposed antenna can switch its operating bandwidth between ultrawideband and narrowband by connecting/disconnecting the ground plane for the feedline from that of the radiator. This could be achieved by using conventional semiconductor switches. However, such switches provide point-like contacts. Consequently, there are gaps in electrical contact between the switches. Surface currents, flowing around these gaps, lead to significant back radiation. In this letter, the slugs of a liquid metal are used to completely fill the gaps. This significantly reduces the back radiation, increases the bore-sight gain, and produces a pattern identical to that of a conventional microstrip patch antenna. Specifically, the realized gain and total efficiency are increased by 2 dBi and 24%, respectively. The antenna has potential applications in wireless systems employing cognitive radio (CR) and spectrum aggregation.</description><subject>Antenna measurements</subject><subject>Antenna radiation patterns</subject><subject>Antennas</subject><subject>Bandwidth reconfiguration</subject><subject>Bandwidths</subject><subject>Boresights</subject><subject>Casting</subject><subject>Cognitive radio</subject><subject>cognitive radio (CR)</subject><subject>Electric contacts</subject><subject>Ground plane</subject><subject>liquid metal</subject><subject>Liquid metals</subject><subject>Liquids</subject><subject>Metals</subject><subject>microstrip antenna</subject><subject>Microstrip antennas</subject><subject>monopole antenna</subject><subject>Narrowband</subject><subject>Patch antennas</subject><subject>Radiators</subject><subject>reconfigurable antennas</subject><subject>Slugs</subject><subject>spectrum aggregation</subject><subject>Switches</subject><subject>Ultra wideband antennas</subject><subject>Ultrawideband</subject><subject>ultrawideband (UWB) antennas</subject><issn>1536-1225</issn><issn>1548-5757</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo9kE1Lw0AURQdRsFZ_gLgpuJ44bybztazFqhBRRHE5zHReNKUm7SRB_PcmtLh6d3HufXAIuQSWATB7U8w_XjLOwGbcSmu0PSITkLmhUkt9PGahKHAuT8lZ264ZA62kmBBaVLu-irMn7Pxmduvr-FPF7ou-4qqpy-qzTz5scDavO6xrf05OSr9p8eJwp-R9efe2eKDF8_3jYl7QlRCqowGED8C19rkOUXkW8iB0iWUOUWiFUmJUumQ8Ws0i4wbRa64UM9EEg15MyfV-d5uaXY9t59ZNn-rhpeMilxLAGjtQsKdWqWnbhKXbpurbp18HzI1W3GjFjVbcwcrQudp3KkT854cxwaQSfyjhXPQ</recordid><startdate>202001</startdate><enddate>202001</enddate><creator>Alqurashi, Khaled Yahya</creator><creator>Kelly, James R.</creator><creator>Wang, Zhengpeng</creator><creator>Crean, Carol</creator><creator>Mittra, Raj</creator><creator>Khalily, Mohsen</creator><creator>Gao, Yue</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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| ispartof | IEEE antennas and wireless propagation letters, 2020-01, Vol.19 (1), p.218-222 |
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| source | IEEE Electronic Library (IEL) Journals |
| subjects | Antenna measurements Antenna radiation patterns Antennas Bandwidth reconfiguration Bandwidths Boresights Casting Cognitive radio cognitive radio (CR) Electric contacts Ground plane liquid metal Liquid metals Liquids Metals microstrip antenna Microstrip antennas monopole antenna Narrowband Patch antennas Radiators reconfigurable antennas Slugs spectrum aggregation Switches Ultra wideband antennas Ultrawideband ultrawideband (UWB) antennas |
| title | Liquid Metal Bandwidth-Reconfigurable Antenna |
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