{"id":61374,"date":"2016-07-19T16:43:00","date_gmt":"2016-07-19T20:43:00","guid":{"rendered":"https:\/\/www.nasa.gov\/?migration=converted-node-386668"},"modified":"2023-07-26T12:19:30","modified_gmt":"2023-07-26T16:19:30","slug":"integrated-submillimeter-wave-inp-hbt-electronics-for-atmospheric-radiometry","status":"publish","type":"post","link":"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/integrated-submillimeter-wave-inp-hbt-electronics-for-atmospheric-radiometry\/","title":{"rendered":"Integrated Submillimeter-Wave InP HBT Electronics for Atmospheric Radiometry"},"content":{"rendered":"\n<p><strong>Caitlyn Cooke<\/strong><br>\n<em>University Of Colorado, Boulder<\/em><\/p>\n\n\n\n<p>The goal of this research is to improve the accuracy, sensitivity, and stability of a 325 GHz submillimeter-wave radiometer for ice cloud imaging. The study of clouds and precipitation systems advance our understanding of the atmosphere and global climate change. This study seeks to demonstrate components that improve on the performance of commercially available components, develop components that do not exist, and demonstrate the ability to integrate multiple components in a compact package. Recent advancements in semiconductor fabrication have enabled improvements of active and passive components in the submillimeter-wave range. Indium phosphide heterojunction bipolar transistors are a promising technology in the development of terahertz frequency active components for submillimeter-wave radiometry.<\/p>\n\n\n\n<p>We will use the 130-nm indium phosphide (InP) double heterojunction bipolar transistor (DHBT) process developed by Teledyne Scientific. Terahertz monolithic integrated circuits (TMICs) can be realized with this process, which enable the design of a compact receiver on a single chip. Over the course of this experience, I will primarily focus on the validation of individual components using the InP DHBT process for future integration. The emphasis will be on the development of the front-end calibration module, terahertz bandpass filter, and RF LNA. The presence of the LNA in the front-end significantly reduces the overall noise figure of the system. Without this stage, the noise figure is primarily dominated by the mixer noise figure and conversion loss, which is currently the limiting factor in submillimeter-wave receiver sensitivity. The front-end filter stage eliminates double sideband ambiguity, which currently limits the channelization of scientific frequency bands of interest. A fast switching internally integrated calibration module will simplify system design, reduce cost, and increase calibration frequency by reducing the need for complicated cold sky calibration pointing maneuvers or costly thermal systems. The component performance will be tested with a 325 GHz heterodyne receiver prototype. Components will then be systematically integrated on a single chip to demonstrate their interconnect performance. The end goal is to produce a fully integrated TMIC that encompasses the front end RF components, LO chain components, and mixer. Individual components developed in this research can also be used to improve the performance of existing NASA missions.<\/p>\n\n\n\n<p><a href=\"\/directorates\/spacetech\/strg\/nstrf-2016\"><strong>Back to NSTRF 2016 Full List<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Caitlyn Cooke University Of Colorado, Boulder The goal of this research is to improve the accuracy, sensitivity, and stability of a 325 GHz submillimeter-wave radiometer for ice cloud imaging. The study of clouds and precipitation systems advance our understanding of the atmosphere and global climate change. This study seeks to demonstrate components that improve on […]<\/p>\n","protected":false},"author":66,"featured_media":47963,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nasa_hds_core_meta_l10n":"en-US","nasa_hds_core_meta_article_editor":"","nasa_hds_core_meta_article_contacts":[],"nasa_hds_core_meta_article_topic":"","nasa_hds_core_meta_linked_locations":[],"nasa_hds_core_meta_article_related_articles":[],"hds_migrate_meta_pr_release_id":"","hds_migrate_meta_pr_release_type":"","nasa_hds_core_meta_location_x":"","nasa_hds_core_meta_location_y":"","nasa_hds_core_meta_gallery_images":[],"footnotes":""},"categories":[3337],"news-tags":[],"internal-terms":[9529,12750],"coauthors":[],"parsely":{"version":"1.1.0","meta":{"@context":"https:\/\/schema.org","@type":"NewsArticle","headline":"Integrated Submillimeter-Wave InP HBT Electronics for Atmospheric Radiometry","url":"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/integrated-submillimeter-wave-inp-hbt-electronics-for-atmospheric-radiometry\/","mainEntityOfPage":{"@type":"WebPage","@id":"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/integrated-submillimeter-wave-inp-hbt-electronics-for-atmospheric-radiometry\/"},"thumbnailUrl":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg?w=150&h=150&crop=1","image":{"@type":"ImageObject","url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg"},"articleSection":"NASA Directorates","author":[{"@type":"Person","name":"Loura Hall"}],"creator":["Loura Hall"],"publisher":{"@type":"Organization","name":"NASA","logo":"https:\/\/www.nasa.gov\/wp-content\/themes\/nasa\/assets\/images\/nasa-logo.svg"},"keywords":["NASA Directorates","Space Technology Mission Directorate","Space Technology Research Grants"],"dateCreated":"2016-07-19T20:43:00Z","datePublished":"2016-07-19T20:43:00Z","dateModified":"2023-07-26T16:19:30Z"},"rendered":"<meta name=\"parsely-title\" content=\"Integrated Submillimeter-Wave InP HBT Electronics for Atmospheric Radiometry\" \/>\n<meta name=\"parsely-link\" content=\"https:\/\/www.nasa.gov\/directorates\/stmd\/space-tech-research-grants\/integrated-submillimeter-wave-inp-hbt-electronics-for-atmospheric-radiometry\/\" \/>\n<meta name=\"parsely-type\" content=\"post\" \/>\n<meta name=\"parsely-image-url\" content=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg?w=150&h=150&crop=1\" \/>\n<meta name=\"parsely-pub-date\" content=\"2016-07-19T20:43:00Z\" \/>\n<meta name=\"parsely-section\" content=\"NASA Directorates\" \/>\n<meta name=\"parsely-tags\" content=\"NASA Directorates,Space Technology Mission Directorate,Space Technology Research Grants\" \/>\n<meta name=\"parsely-author\" content=\"Loura Hall\" \/>","tracker_url":"https:\/\/cdn.parsely.com\/keys\/nasa.gov\/p.js"},"read_time":2,"time_ago":"8 years","featured_image":{"id":47963,"file":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2016\/06\/hubble_friday_06242016.jpg","title":"The stars of the Large Magellanic Cloud","alt":"A gathering of red, white and blue stars in the constellation of Dorado","caption":"This NASA\/ESA Hubble Space Telescope image shows the globular cluster NGC 1854, a gathering of white and blue stars in the southern constellation of Dorado (The Dolphinfish). NGC 1854 is located about 135 000 light-years away, in the Large Magellanic Cloud (LMC), one of our closest cosmic neighbours and a satellite galaxy of the Milky Way. The LMC is a hotbed of vigorous star formation. Rich in interstellar gas and dust, the galaxy is home to approximately 60 globular clusters and 700 open clusters. These clusters are frequently the subject of astronomical research, as the Large Magellanic Cloud and its little sister, the Small Magellanic Cloud, are the only systems known to contain clusters at all stages of evolution. Hubble is often used to study these clusters as its extremely high-resolution cameras can resolve individual stars, even at the clusters\u2019 crowded cores, revealing their mass, size and degree of evolution."},"_links":{"self":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts\/61374"}],"collection":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/users\/66"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/comments?post=61374"}],"version-history":[{"count":1,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts\/61374\/revisions"}],"predecessor-version":[{"id":463521,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/posts\/61374\/revisions\/463521"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media\/47963"}],"wp:attachment":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media?parent=61374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/categories?post=61374"},{"taxonomy":"news-tags","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/news-tags?post=61374"},{"taxonomy":"internal-terms","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/internal-terms?post=61374"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/coauthors?post=61374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}