{"554361":{"#nid":"554361","#data":{"type":"event","title":"Ph.D. Proposal Oral Exam - Christopher Barisich","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u0026nbsp; \u003C\/strong\u003E\u003Cem\u003EDesign and Integration of Hybrid and Monolithic Microwave Power Amplifiers for Wideband Applications using Gallium Nitride Technology\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee:\u0026nbsp; \u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EDr. Papapolymerou, Advisor\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EDr. Cressler, Chair\u003C\/p\u003E\u003Cp\u003EDr. Wang\u003C\/p\u003E\u003Cp\u003EDr. Gebara\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003EThe objective of the proposed research is to compare, contrast, and\u0026nbsp; advance the predominant methods of realizing broadband microwave power\u0026nbsp; amplifiers (PAs) up to 40 GHz with high efficiency using gallium nitride\u0026nbsp; (GaN) technology. The studied architectures are based on the\u0026nbsp; reactive\/resistive matching approach and the traveling wave technique in\u0026nbsp; both hybrid and monolithic microwave integrated circuits (MMICs). With a\u0026nbsp; focus on improving the bandwidth and efficiency of these architectures,\u0026nbsp; the presented hybrid PA designs achieve cutting edge performance from\u0026nbsp; commercially available GaN power transistors. Further details of design\u0026nbsp; development and integration are discussed, featuring discrete component\u0026nbsp; descriptions, substrate material selections, additional matching\u0026nbsp; techniques, and analyses of both wirebonds and flip-chip bonds that are\u0026nbsp; used for PA interconnections. To complement these novel hybrid PA design\u0026nbsp; and integration developments, the results of device characterization and\u0026nbsp; wideband modeling are presented for a new 0.15 \u00b5m GaN MMIC process in\u0026nbsp; support of a broadband PA design with reactive\/resistive matching.\u0026nbsp; Finally, an ultra-wideband MMIC non-uniform distributed PA design is\u0026nbsp; fabricated on a pre-release version of a new 0.14 \u00b5m GaN MMIC process,\u0026nbsp; and preliminary small-signal measurements from 2-40 GHz show promising\u0026nbsp; results.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Design and Integration of Hybrid and Monolithic Microwave Power Amplifiers for Wideband Applications using Gallium Nitride Technology"}],"uid":"28475","created_gmt":"2016-07-20 14:26:31","changed_gmt":"2016-10-08 02:18:25","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-07-25T14:00:00-04:00","event_time_end":"2016-07-25T14:00:00-04:00","event_time_end_last":"2016-07-25T14:00:00-04:00","gmt_time_start":"2016-07-25 18:00:00","gmt_time_end":"2016-07-25 18:00:00","gmt_time_end_last":"2016-07-25 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434371","name":"ECE Ph.D. Proposal Oral Exams"}],"categories":[],"keywords":[{"id":"1808","name":"graduate students"},{"id":"102851","name":"Phd proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}