{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/113105"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/113105","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Manipulation of antenna-mode radar cross-section in patch antennas","abstract":"The Radar Cross-Section (RCS) of an antenna has two main components: structural RCS and antenna-mode RCS. Structural RCS is due to the physical geometry of the antenna. The antenna-mode RCS component is due to load impedance mismatches and can be manipulated by changing the load impedance connected to the antenna. This thesis explores the behavior of antenna-mode RCS when the load of a simple patch antenna is changed. The load is iterated through equally spaced points on a fixed Voltage Standing Wave Ratio (VSWR) circle on a Smith chart. The behavior was simulated at the fundamental frequency and the first and second harmonics. The patch antenna and the various loads were fabricated, and the actual change in RCS was measured in an anechoic chamber. The simulation data is compared to the measured data. It is seen that a predictable change in RCS occurs as load points are moved around a constant VSWR circle.","abstract_html":"The Radar Cross-Section (RCS) of an antenna has two main components: structural RCS and antenna-mode RCS. Structural RCS is due to the physical geometry of the antenna. The antenna-mode RCS component is due to load impedance mismatches and can be manipulated by changing the load impedance connected to the antenna. This thesis explores the behavior of antenna-mode RCS when the load of a simple patch antenna is changed. The load is iterated through equally spaced points on a fixed Voltage Standing Wave Ratio (VSWR) circle on a Smith chart. The behavior was simulated at the fundamental frequency and the first and second harmonics. The patch antenna and the various loads were fabricated, and the actual change in RCS was measured in an anechoic chamber. The simulation data is compared to the measured data. It is seen that a predictable change in RCS occurs as load points are moved around a constant VSWR circle.","abstract_has_math":false,"creators":["Smith, Ian H."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Bernhard, Jennifer T"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2022,"date_issued":"2022-01-12T21:47:04Z","date_published":"2022-01-12T21:47:04Z","updated_at":"2026-07-22T22:24:53Z","subjects":["Radar Cross-Section","Reflection","RCS Manipulation","RCS Modulation","Patch Antenna","Resonant Antenna","Impedance Mismatch","Antenna-Mode RCS"],"languages":["en"],"rights":["Copyright 2021 Ian Smith"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/113105","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Bernhard, Jennifer T"]},{"key":"dc:creator","label":"Author","values":["Smith, Ian H."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2022-01-12T21:47:04Z","2021-07-23","2021-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Radar Cross-Section","Reflection","RCS Manipulation","RCS Modulation","Patch Antenna","Resonant Antenna","Impedance Mismatch","Antenna-Mode RCS"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2021 Ian Smith"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/113105"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The Radar Cross-Section (RCS) of an antenna has two main components: structural RCS and antenna-mode RCS. Structural RCS is due to the physical geometry of the antenna. The antenna-mode RCS component is due to load impedance mismatches and can be manipulated by changing the load impedance connected to the antenna. This thesis explores the behavior of antenna-mode RCS when the load of a simple patch antenna is changed. The load is iterated through equally spaced points on a fixed Voltage Standing Wave Ratio (VSWR) circle on a Smith chart. The behavior was simulated at the fundamental frequency and the first and second harmonics. The patch antenna and the various loads were fabricated, and the actual change in RCS was measured in an anechoic chamber. The simulation data is compared to the measured data. It is seen that a predictable change in RCS occurs as load points are moved around a constant VSWR circle.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-01-12 without embargo terms","The student, Ian Smith, accepted the attached license on 2021-07-23 at 11:34.","The student, Ian Smith, submitted this Thesis for approval on 2021-07-23 at 11:56.","This Thesis was approved for publication on 2021-07-23 at 14:54.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17083 on 2022-01-12 at 12:46:59","Made available in DSpace on 2022-01-12T21:47:04Z (GMT). No. of bitstreams: 2 SMITH-THESIS-2021.pdf: 5358852 bytes, checksum: cf0dbcceb8aa02c9eb81e350dac768e4 (MD5) LICENSE.txt: 4206 bytes, checksum: 3197de203bd053ac735b186c1c94e8c1 (MD5) Previous issue date: 2021-07-23"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Manipulation of antenna-mode radar cross-section in patch antennas"]}]}],"canonical_facts":{"dc:contributor":["Bernhard, Jennifer T"],"dc:creator":["Smith, Ian H."],"dc:date":["2022-01-12T21:47:04Z","2021-07-23","2021-08"],"dc:description":["The Radar Cross-Section (RCS) of an antenna has two main components: structural RCS and antenna-mode RCS. Structural RCS is due to the physical geometry of the antenna. The antenna-mode RCS component is due to load impedance mismatches and can be manipulated by changing the load impedance connected to the antenna. This thesis explores the behavior of antenna-mode RCS when the load of a simple patch antenna is changed. The load is iterated through equally spaced points on a fixed Voltage Standing Wave Ratio (VSWR) circle on a Smith chart. The behavior was simulated at the fundamental frequency and the first and second harmonics. The patch antenna and the various loads were fabricated, and the actual change in RCS was measured in an anechoic chamber. The simulation data is compared to the measured data. It is seen that a predictable change in RCS occurs as load points are moved around a constant VSWR circle.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-01-12 without embargo terms","The student, Ian Smith, accepted the attached license on 2021-07-23 at 11:34.","The student, Ian Smith, submitted this Thesis for approval on 2021-07-23 at 11:56.","This Thesis was approved for publication on 2021-07-23 at 14:54.","DSpace SAF Submission Ingestion Package generated from Vireo submission #17083 on 2022-01-12 at 12:46:59","Made available in DSpace on 2022-01-12T21:47:04Z (GMT). No. of bitstreams: 2 SMITH-THESIS-2021.pdf: 5358852 bytes, checksum: cf0dbcceb8aa02c9eb81e350dac768e4 (MD5) LICENSE.txt: 4206 bytes, checksum: 3197de203bd053ac735b186c1c94e8c1 (MD5) Previous issue date: 2021-07-23"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/113105"],"dc:language":["en"],"dc:rights":["Copyright 2021 Ian Smith"],"dc:subject":["Radar Cross-Section","Reflection","RCS Manipulation","RCS Modulation","Patch Antenna","Resonant Antenna","Impedance Mismatch","Antenna-Mode RCS"],"dc:title":["Manipulation of antenna-mode radar cross-section in patch antennas"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:53Z"}