{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/69332"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/69332","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Analysis and Optimization of Reflector Antenna Systems (Pattern Calculation, Optimum Directivity, Sidelobe Reduction)","abstract":"This thesis studies the secondary pattern of a perfectly conducting reflector antenna system being illuminated by an array feed with arbitrary location, polarization, and orientation. The methods of analysis used are physical optics (PO) and the application of the Fast Fourier Transform (FFT) to the aperture fields obtained using geometrical optics (GO), geometrical theory of diffraction (GTD) and a brute-force FFT. Key features of the present work are (i) the reflector surface is completely arbitrary, (ii) the incident field from the array feed is most general with arbitrary polarization and location, and (iii) the edge diffraction is calculated by either UAT (Lee and Deschamps)or by UTD (Kouyoumjian and Pathak).","abstract_html":"This thesis studies the secondary pattern of a perfectly conducting reflector antenna system being illuminated by an array feed with arbitrary location, polarization, and orientation. The methods of analysis used are physical optics (PO) and the application of the Fast Fourier Transform (FFT) to the aperture fields obtained using geometrical optics (GO), geometrical theory of diffraction (GTD) and a brute-force FFT. Key features of the present work are (i) the reflector surface is completely arbitrary, (ii) the incident field from the array feed is most general with arbitrary polarization and location, and (iii) the edge diffraction is calculated by either UAT (Lee and Deschamps)or by UTD (Kouyoumjian and Pathak).","abstract_has_math":false,"creators":["Lam, Peter Tak Chun"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-15T19:05:07Z","date_published":"2014-12-15T19:05:07Z","updated_at":"2026-07-22T22:26:00Z","subjects":["Engineering, Electronics and Electrical"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8610952"],"render_values":[{"text":"(UMI)AAI8610952","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/69332","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Lam, Peter Tak Chun"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T19:05:07Z","10000-01-01","1986"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"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":["Engineering, Electronics and Electrical"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/69332","(UMI)AAI8610952"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis studies the secondary pattern of a perfectly conducting reflector antenna system being illuminated by an array feed with arbitrary location, polarization, and orientation. The methods of analysis used are physical optics (PO) and the application of the Fast Fourier Transform (FFT) to the aperture fields obtained using geometrical optics (GO), geometrical theory of diffraction (GTD) and a brute-force FFT. Key features of the present work are (i) the reflector surface is completely arbitrary, (ii) the incident field from the array feed is most general with arbitrary polarization and location, and (iii) the edge diffraction is calculated by either UAT (Lee and Deschamps)or by UTD (Kouyoumjian and Pathak).","The techniques developed for secondary pattern calculation have several applications. These applications are the strategy for calculating reflector antenna patterns and directivity optimization of a reflector antenna with cluster feeds, and reducing the sidelobe level of a reflector antenna by adding auxiliary reflectors.","Made available in DSpace on 2014-12-15T19:05:07Z (GMT). No. of bitstreams: 1 8610952.pdf: 3192757 bytes, checksum: 98e11b077a1396f4b8cfe812af514a2d (MD5) Previous issue date: 1986","Embargo set by: Seth Robbins for item 69498 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","146 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986."]},{"key":"dc:title","label":"Title","values":["Analysis and Optimization of Reflector Antenna Systems (Pattern Calculation, Optimum Directivity, Sidelobe Reduction)"]}]}],"canonical_facts":{"dc:creator":["Lam, Peter Tak Chun"],"dc:date":["2014-12-15T19:05:07Z","10000-01-01","1986"],"dc:description":["This thesis studies the secondary pattern of a perfectly conducting reflector antenna system being illuminated by an array feed with arbitrary location, polarization, and orientation. The methods of analysis used are physical optics (PO) and the application of the Fast Fourier Transform (FFT) to the aperture fields obtained using geometrical optics (GO), geometrical theory of diffraction (GTD) and a brute-force FFT. Key features of the present work are (i) the reflector surface is completely arbitrary, (ii) the incident field from the array feed is most general with arbitrary polarization and location, and (iii) the edge diffraction is calculated by either UAT (Lee and Deschamps)or by UTD (Kouyoumjian and Pathak).","The techniques developed for secondary pattern calculation have several applications. These applications are the strategy for calculating reflector antenna patterns and directivity optimization of a reflector antenna with cluster feeds, and reducing the sidelobe level of a reflector antenna by adding auxiliary reflectors.","Made available in DSpace on 2014-12-15T19:05:07Z (GMT). No. of bitstreams: 1 8610952.pdf: 3192757 bytes, checksum: 98e11b077a1396f4b8cfe812af514a2d (MD5) Previous issue date: 1986","Embargo set by: Seth Robbins for item 69498 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","146 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986."],"dc:identifier":["http://hdl.handle.net/2142/69332","(UMI)AAI8610952"],"dc:subject":["Engineering, Electronics and Electrical"],"dc:title":["Analysis and Optimization of Reflector Antenna Systems (Pattern Calculation, Optimum Directivity, Sidelobe Reduction)"],"dc:type":["text"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:00Z"}