{"id":{"repo_id":"nus","oai_identifier":"oai:scholarbank.nus.edu.sg:10635/25044"},"canonical_url":"https://search.dev.ndltd.org/etd/nus/oai:scholarbank.nus.edu.sg:10635/25044","repository":{"repo_id":"nus","name":"National University of Singapore","base_url":"https://scholarbank.nus.edu.sg/oai/request"},"display":{"title":"Design and analysis of ultra-wide band and millimeter-wave antennas","abstract":"Ultra-wideband (UWB) antennas and 60-GHz millimeter-wave antennas and arrays are analyzed and designed in this thesis for developing high-speed short-range wireless communications. Firstly, a probe-fed crossed circle-disk monopole UWB antenna with stable omnidirectional radiation pattern was studied. The antenna was then cut by half to form a crossed semi-circle monopole antenna with a top-loaded patch to reduce its height. Moreover, a new crossed semi-ring band-notch UWB antenna with L shaped slots was developed. Secondly, an effective equivalent circuit for a UWB antenna was proposed for possible co-designing with analog/digital integrated circuits in the time domain by using a new automatic physical augmentation with tuning method. The proposed method has been validated for modeling a spiral inductor and an MIM capacitor in a wide bandwidth. Next, a new compact and multilayer UWB planar antenna was designed using the low temperature co-fired ceramics (LTCC) technology, which gives the possibility of integrating RF circuits and antennas in a single substrate. The configuration of the proposed multilayer UWB LTCC planar antenna fully exploits the three-dimensional (3-D) integration feature of the LTCC technology and explores a new way for antenna size reduction. Lastly, novel 60 GHz integrated antennas and arrays using the LTCC technology were developed. A new wideband planar circularly polarized helical antenna array was designed and realized in LTCC. Moreover, a wideband LTCC aperture-coupled truncated-corner circularly polarized patch antenna with a sequential rotation feeding scheme was proposed in the 60-GHz band. The wire-bonding packaging technology with a T-network compensation was also studied in the 60-GHz band. Development of an active circularly-polarized antenna by integrating the antenna array with a low noise amplifier in LTCC was demonstrated to enhance the receiving power.","abstract_html":"Ultra-wideband (UWB) antennas and 60-GHz millimeter-wave antennas and arrays are analyzed and designed in this thesis for developing high-speed short-range wireless communications. Firstly, a probe-fed crossed circle-disk monopole UWB antenna with stable omnidirectional radiation pattern was studied. The antenna was then cut by half to form a crossed semi-circle monopole antenna with a top-loaded patch to reduce its height. Moreover, a new crossed semi-ring band-notch UWB antenna with L shaped slots was developed. Secondly, an effective equivalent circuit for a UWB antenna was proposed for possible co-designing with analog/digital integrated circuits in the time domain by using a new automatic physical augmentation with tuning method. The proposed method has been validated for modeling a spiral inductor and an MIM capacitor in a wide bandwidth. Next, a new compact and multilayer UWB planar antenna was designed using the low temperature co-fired ceramics (LTCC) technology, which gives the possibility of integrating RF circuits and antennas in a single substrate. The configuration of the proposed multilayer UWB LTCC planar antenna fully exploits the three-dimensional (3-D) integration feature of the LTCC technology and explores a new way for antenna size reduction. Lastly, novel 60 GHz integrated antennas and arrays using the LTCC technology were developed. A new wideband planar circularly polarized helical antenna array was designed and realized in LTCC. Moreover, a wideband LTCC aperture-coupled truncated-corner circularly polarized patch antenna with a sequential rotation feeding scheme was proposed in the 60-GHz band. The wire-bonding packaging technology with a T-network compensation was also studied in the 60-GHz band. Development of an active circularly-polarized antenna by integrating the antenna array with a low noise amplifier in LTCC was demonstrated to enhance the receiving power.","abstract_has_math":false,"creators":["ZHANG YAQIONG"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2010,"date_issued":"2010-12-23","date_published":"2010-12-23","updated_at":"2026-07-24T03:31:51Z","subjects":["ultra-wide band, millimeter-wave, antenna"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["ZHANG YAQIONG"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2010-12-23"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://scholarbank.nus.edu.sg/handle/10635/25044"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ultra-wide band, millimeter-wave, antenna"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://scholarbank.nus.edu.sg/bitstreams/9bcbcf7d-5fd2-4bb1-b132-53dbd319ed10/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Ultra-wideband (UWB) antennas and 60-GHz millimeter-wave antennas and arrays are analyzed and designed in this thesis for developing high-speed short-range wireless communications. 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The configuration of the proposed multilayer UWB LTCC planar antenna fully exploits the three-dimensional (3-D) integration feature of the LTCC technology and explores a new way for antenna size reduction. Lastly, novel 60 GHz integrated antennas and arrays using the LTCC technology were developed. A new wideband planar circularly polarized helical antenna array was designed and realized in LTCC. Moreover, a wideband LTCC aperture-coupled truncated-corner circularly polarized patch antenna with a sequential rotation feeding scheme was proposed in the 60-GHz band. The wire-bonding packaging technology with a T-network compensation was also studied in the 60-GHz band. 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Moreover, a new crossed semi-ring band-notch UWB antenna with L shaped slots was developed. Secondly, an effective equivalent circuit for a UWB antenna was proposed for possible co-designing with analog/digital integrated circuits in the time domain by using a new automatic physical augmentation with tuning method. The proposed method has been validated for modeling a spiral inductor and an MIM capacitor in a wide bandwidth. Next, a new compact and multilayer UWB planar antenna was designed using the low temperature co-fired ceramics (LTCC) technology, which gives the possibility of integrating RF circuits and antennas in a single substrate. The configuration of the proposed multilayer UWB LTCC planar antenna fully exploits the three-dimensional (3-D) integration feature of the LTCC technology and explores a new way for antenna size reduction. Lastly, novel 60 GHz integrated antennas and arrays using the LTCC technology were developed. A new wideband planar circularly polarized helical antenna array was designed and realized in LTCC. Moreover, a wideband LTCC aperture-coupled truncated-corner circularly polarized patch antenna with a sequential rotation feeding scheme was proposed in the 60-GHz band. The wire-bonding packaging technology with a T-network compensation was also studied in the 60-GHz band. 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