{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/129690"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/129690","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Investigation of antennas with non-reciprocal radiation characteristics","abstract":"Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01","abstract_html":"Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01","abstract_has_math":false,"creators":["Cain, Sasha Seneca Yamada"],"institution":"University of Illinois Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Bernhard, Jennifer T","Ilie, Raluca","Schutt-Ainé, Jose","Zhao, Yang"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-04-17","date_published":"2025-04-17","updated_at":"2026-07-22T22:25:05Z","subjects":["antennas","electromagnetics","non-reciprocal antennas","modal analysis"],"languages":["en","eng"],"rights":["Copyright 2025 Sasha Seneca Yamada Cain"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/129690","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Bernhard, Jennifer T","Ilie, Raluca","Schutt-Ainé, Jose","Zhao, Yang"]},{"key":"dc:creator","label":"Author","values":["Cain, Sasha Seneca Yamada"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-04-17","2025-05"]},{"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":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["antennas","electromagnetics","non-reciprocal antennas","modal analysis"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2025 Sasha Seneca Yamada Cain"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/129690"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01","The student, Sasha Cain, accepted the attached license on 2025-04-15 at 11:54.","The student, Sasha Cain, submitted this Dissertation for approval on 2025-04-15 at 12:05.","This Dissertation was approved for publication on 2025-04-17 at 12:22.","DSpace SAF Submission Ingestion Package generated from Vireo submission #21775 on 2025-10-19 at 19:52:54","Antennas are essential in all wireless systems, serving as the link between a guided signal and free space. Since their invention in the late 1880s, antennas have been designed almost exclusively as reciprocal devices. This assumption of reciprocity allows us to design an antenna from a transmit perspective and have confidence that it will work just as well as a receiver. However, as wireless systems become more advanced, the routine assumption of reciprocity denies us of a useful degree of freedom. This work explores a new paradigm in antenna engineering by investigating antennas deliberately designed to display non-reciprocal behavior. Specifically, unidirectional true-time delays are explored as a means to achieve non-reciprocal radiation. The result is a wideband and low-loss method to induce non-reciprocity into an antenna system, supported by several design-focused models and experimental results. Additionally, an excitation-dependent electromagnetic modal analysis technique is developed. This analytical method builds on previous work to mathematically separate the surface currents responsible for radiation and energy storage. This methodology is validated by analyzing the modal results of simple wire antennas and connecting the results back to known behavior. More complex geometries, such as planar single-element antennas and small arrays, are also discussed. This modal analysis work supports the overarching goal of developing non-reciprocal antenna systems because of its excitation-dependent formulation, which makes it uniquely appropriate for systems that exhibit distinct transmit and receive behavior."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Investigation of antennas with non-reciprocal radiation characteristics"]}]}],"canonical_facts":{"dc:contributor":["Bernhard, Jennifer T","Ilie, Raluca","Schutt-Ainé, Jose","Zhao, Yang"],"dc:creator":["Cain, Sasha Seneca Yamada"],"dc:date":["2025-04-17","2025-05"],"dc:description":["Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01","The student, Sasha Cain, accepted the attached license on 2025-04-15 at 11:54.","The student, Sasha Cain, submitted this Dissertation for approval on 2025-04-15 at 12:05.","This Dissertation was approved for publication on 2025-04-17 at 12:22.","DSpace SAF Submission Ingestion Package generated from Vireo submission #21775 on 2025-10-19 at 19:52:54","Antennas are essential in all wireless systems, serving as the link between a guided signal and free space. Since their invention in the late 1880s, antennas have been designed almost exclusively as reciprocal devices. This assumption of reciprocity allows us to design an antenna from a transmit perspective and have confidence that it will work just as well as a receiver. However, as wireless systems become more advanced, the routine assumption of reciprocity denies us of a useful degree of freedom. This work explores a new paradigm in antenna engineering by investigating antennas deliberately designed to display non-reciprocal behavior. Specifically, unidirectional true-time delays are explored as a means to achieve non-reciprocal radiation. The result is a wideband and low-loss method to induce non-reciprocity into an antenna system, supported by several design-focused models and experimental results. Additionally, an excitation-dependent electromagnetic modal analysis technique is developed. This analytical method builds on previous work to mathematically separate the surface currents responsible for radiation and energy storage. This methodology is validated by analyzing the modal results of simple wire antennas and connecting the results back to known behavior. More complex geometries, such as planar single-element antennas and small arrays, are also discussed. This modal analysis work supports the overarching goal of developing non-reciprocal antenna systems because of its excitation-dependent formulation, which makes it uniquely appropriate for systems that exhibit distinct transmit and receive behavior."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/129690"],"dc:language":["en","eng"],"dc:rights":["Copyright 2025 Sasha Seneca Yamada Cain"],"dc:subject":["antennas","electromagnetics","non-reciprocal antennas","modal analysis"],"dc:title":["Investigation of antennas with non-reciprocal radiation characteristics"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:05Z"}