{"582555":{"#nid":"582555","#data":{"type":"event","title":"Ph.D. Dissertation Defense - Ickhyun Song","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle\u003C\/strong\u003E\u003Cem\u003E:\u0026nbsp; \u003C\/em\u003E\u003Cem\u003EDesign of SiGe HBT RF Building Blocks for Extreme Environment Applications\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. John Cressler, ECE, Chair , Advisor\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Andrew Peterson, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Hua Wang, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Maysam Ghovanloo, ECE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Hao-Min Zhou, Math\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp;\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe objective of this research is to understand the behavior of radio-frequency (RF) circuits under extreme-environment condition and to investigate the potential mitigation solution for single-event effects (SEEs). In this work, silicon-germanium (SiGe) heterojunction-bipolar-transistor (HBT) technology has been utilized for the design of SEE-hardened RF switches, low-noise amplifiers (LNAs), and mixers. For SEE-hardened RF circuits, the use of inverse-mode SiGe HBTs has been studied in terms of both RF performance and SEE sensitivity. With the SEE-mitigated RF building blocks, the integrated receivers have been designed and characterized in order to confirm function-level mitigation.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe impact of technology scaling on the applicable SEE-mitigation techniques has been addressed in this work. The inverse-mode SiGe HBTs have exhibited significantly improved RF performance, broadening their use to active RF gain stages. In addition, cryogenic operations of the SEE-hardened LNA have been characterized for a wider range of extreme-environment applications.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EHigh-performance RF building blocks for wideband transceivers and phased-array radar systems have been also proposed in this work. An active wideband power divider\/combiner supporting bi-directional operation has been implemented in SiGe BiCMOS platform. And a low-loss wideband digital-step attenuator has been demonstrated with low phase\/amplitude imbalance.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Design of SiGe HBT RF Building Blocks for Extreme Environment Applications"}],"uid":"28475","created_gmt":"2016-10-13 21:25:46","changed_gmt":"2016-10-13 21:25:46","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2016-10-27T10:30:00-04:00","event_time_end":"2016-10-27T12:30:00-04:00","event_time_end_last":"2016-10-27T12:30:00-04:00","gmt_time_start":"2016-10-27 14:30:00","gmt_time_end":"2016-10-27 16:30:00","gmt_time_end_last":"2016-10-27 16:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434381","name":"ECE Ph.D. Dissertation Defenses"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"},{"id":"1808","name":"graduate students"}],"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":""}}}