{"id":{"repo_id":"missouri","oai_identifier":"oai:mospace.umsystem.edu:10355/4310"},"canonical_url":"https://search.dev.ndltd.org/etd/missouri/oai:mospace.umsystem.edu:10355/4310","repository":{"repo_id":"missouri","name":"University of Missouri","base_url":"https://mospace.umsystem.edu/oai/request"},"display":{"title":"Performance analysis of high power photoconductive switch at elevated temperature","abstract":"This project deals with the analysis of high power radio frequency effects on a non-linear opposed contact GaAs photoconductive semiconductor switch, used in high power microwave generation. Specifically, effects of heating on the contacts and the bulk were studied. The changes in the I-V characteristics before and after heating the switches were analyzed. For heating effects, a power density input had been taken from an electromagnetic code and the simulations were performed at a temperature of 330 K. The carrier conduction process during the on-state operation of the device showed current controlled negative resistivity behavior at elevated temperature, due to heating of contacts and the bulk. Analysis shows that filamentary conduction results in thermal runaway that severely affects and damages the device as the breakdown voltages had been observed to be much less than the operating voltages of the switches. Further simulations were also done on a 6H-SiC photoconductive semiconductor switch and another configuration of the GaAs switch by the inclusion of an n+ layer at the cathode. Similar results were obtained for these switches under the effect of RF heating.","abstract_html":"This project deals with the analysis of high power radio frequency effects on a non-linear opposed contact GaAs photoconductive semiconductor switch, used in high power microwave generation. Specifically, effects of heating on the contacts and the bulk were studied. The changes in the I-V characteristics before and after heating the switches were analyzed. For heating effects, a power density input had been taken from an electromagnetic code and the simulations were performed at a temperature of 330 K. The carrier conduction process during the on-state operation of the device showed current controlled negative resistivity behavior at elevated temperature, due to heating of contacts and the bulk. Analysis shows that filamentary conduction results in thermal runaway that severely affects and damages the device as the breakdown voltages had been observed to be much less than the operating voltages of the switches. Further simulations were also done on a 6H-SiC photoconductive semiconductor switch and another configuration of the GaAs switch by the inclusion of an n+ layer at the cathode. Similar results were obtained for these switches under the effect of RF heating.","abstract_has_math":false,"creators":["Gunda, Rahul"],"institution":"University of Missouri--Columbia","degree_name":"M.S.","degree_level":"Masters","degree_discipline":"Electrical and computer engineering (MU)","degree_department":null,"school":null,"contributors":[],"advisors":["Islam, Naz E."],"committee_chairs":[],"committee_members":[],"year":2005,"date_issued":"2005","date_published":"2005","updated_at":"2026-07-24T03:09:05Z","subjects":[],"languages":["eng","English"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10355/4310","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Islam, Naz E."]},{"key":"dc:creator","label":"Author","values":["Gunda, Rahul"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2010-01-12T16:46:53Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2010-01-12T16:46:53Z"]},{"key":"dc:date.issued","label":"Date","values":["2005"]},{"key":"dc:publisher","label":"Institution","values":["University of Missouri--Columbia"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical and computer engineering (MU)"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Missouri--Columbia"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10355/4310"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.","Title from title screen of research.pdf file viewed on (July 13, 2006)","Includes bibliographical references.","Thesis (M.S.) University of Missouri-Columbia 2005.","Dissertations, Academic -- University of Missouri--Columbia -- Electrical engineering."]},{"key":"dc:description.abstract","label":"Abstract","values":["This project deals with the analysis of high power radio frequency effects on a non-linear opposed contact GaAs photoconductive semiconductor switch, used in high power microwave generation. Specifically, effects of heating on the contacts and the bulk were studied. The changes in the I-V characteristics before and after heating the switches were analyzed. For heating effects, a power density input had been taken from an electromagnetic code and the simulations were performed at a temperature of 330 K. The carrier conduction process during the on-state operation of the device showed current controlled negative resistivity behavior at elevated temperature, due to heating of contacts and the bulk. Analysis shows that filamentary conduction results in thermal runaway that severely affects and damages the device as the breakdown voltages had been observed to be much less than the operating voltages of the switches. Further simulations were also done on a 6H-SiC photoconductive semiconductor switch and another configuration of the GaAs switch by the inclusion of an n+ layer at the cathode. Similar results were obtained for these switches under the effect of RF heating."]},{"key":"dc:title","label":"Title","values":["Performance analysis of high power photoconductive switch at elevated temperature"]}]}],"canonical_facts":{"dc:contributor.advisor":["Islam, Naz E."],"dc:creator":["Gunda, Rahul"],"dc:date.accessioned":["2010-01-12T16:46:53Z"],"dc:date.available":["2010-01-12T16:46:53Z"],"dc:date.issued":["2005"],"dc:description":["The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.","Title from title screen of research.pdf file viewed on (July 13, 2006)","Includes bibliographical references.","Thesis (M.S.) University of Missouri-Columbia 2005.","Dissertations, Academic -- University of Missouri--Columbia -- Electrical engineering."],"dc:description.abstract":["This project deals with the analysis of high power radio frequency effects on a non-linear opposed contact GaAs photoconductive semiconductor switch, used in high power microwave generation. Specifically, effects of heating on the contacts and the bulk were studied. The changes in the I-V characteristics before and after heating the switches were analyzed. For heating effects, a power density input had been taken from an electromagnetic code and the simulations were performed at a temperature of 330 K. The carrier conduction process during the on-state operation of the device showed current controlled negative resistivity behavior at elevated temperature, due to heating of contacts and the bulk. Analysis shows that filamentary conduction results in thermal runaway that severely affects and damages the device as the breakdown voltages had been observed to be much less than the operating voltages of the switches. Further simulations were also done on a 6H-SiC photoconductive semiconductor switch and another configuration of the GaAs switch by the inclusion of an n+ layer at the cathode. Similar results were obtained for these switches under the effect of RF heating."],"dc:identifier.uri":["http://hdl.handle.net/10355/4310"],"dc:language":["English"],"dc:language.iso":["eng"],"dc:publisher":["University of Missouri--Columbia"],"dc:title":["Performance analysis of high power photoconductive switch at elevated temperature"],"dc:type":["Thesis"],"thesis:degree_discipline":["Electrical and computer engineering (MU)"],"thesis:degree_level":["Masters"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Missouri--Columbia"]},"updated_at":"2026-07-24T03:09:05Z"}