{"project":{"acronym":"","projectId":7341,"title":"High-Frequency, Low-Noise Nitride-Based Power Transistors Grown on Bulk III-N, Phase I","primaryTaxonomyNodes":[{"taxonomyNodeId":10656,"taxonomyRootId":8816,"parentNodeId":10654,"level":3,"code":"TX05.2.2","title":"Power-Efficiency","definition":"Power-efficiency includes flight and ground techniques and technologies that make more efficient use of the available system power.","exampleTechnologies":"Traveling wave tube amplifiers (TWTAs), solid-state power amplifiers (SSPAs)","hasChildren":false,"hasInteriorContent":true}],"description":"One of the main issues for III-nitride growth is the lack of a suitable native substrate. Growth on foreign substrates such as sapphire or SiC results in nitride material with a high density of defects due to large mismatches in lattice constant and thermal expansion. Nonetheless, nitride devices grown on these substrates have demonstrated optical and electronic properties that are practically unmatched by other material systems. In particular, the AlGaN/GaN high electron mobility transistors (HEMTs) constitute a leading candidate for simultaneously realizing ultrahigh-frequency low-noise amplifiers and power amplifiers. Here, we propose to use high quality bulk GaN and AlN substrates for substantial improvements in the operation of AlGaN/GaN HEMTs. We also propose a method of isolating the n-type substrate from the active layer. In this way, we take advantage of the reduced thermal and lattice mismatch, lower density of treading dislocations, and improved thermal conductance to significantly improve the dc and RF operation of these devices. Some projected HEMT device parameters to achieve are a current density > 1.5A/mm, extrinsic transconductance values > 400 mS/mm, fmax > 200 GHz, and power density > 10 W/mm at 40 GHz.","startYear":2003,"startMonth":1,"endYear":2003,"endMonth":7,"statusDescription":"Completed","principalInvestigators":[{"contactId":17020,"canUserEdit":false,"firstName":"Amir","lastName":"Dabiran","fullName":"Amir Dabiran","fullNameInverted":"Dabiran, Amir","publicEmail":true,"nacontact":false}],"programDirectors":[{"contactId":206378,"canUserEdit":false,"firstName":"Jason","lastName":"Kessler","fullName":"Jason L Kessler","fullNameInverted":"Kessler, Jason L","middleInitial":"L","primaryEmail":"jason.l.kessler@nasa.gov","publicEmail":true,"nacontact":false}],"programExecutives":[{"contactId":215154,"canUserEdit":false,"firstName":"Jennifer","lastName":"Gustetic","fullName":"Jennifer L Gustetic","fullNameInverted":"Gustetic, Jennifer L","middleInitial":"L","primaryEmail":"jennifer.l.gustetic@nasa.gov","publicEmail":true,"nacontact":false}],"programManagers":[{"contactId":62051,"canUserEdit":false,"firstName":"Carlos","lastName":"Torrez","fullName":"Carlos Torrez","fullNameInverted":"Torrez, Carlos","primaryEmail":"carlos.torrez@nasa.gov","publicEmail":true,"nacontact":false}],"projectManagers":[{"contactId":237682,"canUserEdit":false,"firstName":"Jon","lastName":"Freeman","fullName":"Jon C Freeman","fullNameInverted":"Freeman, Jon C","middleInitial":"C","primaryEmail":"jon.c.freeman@nasa.gov","publicEmail":true,"nacontact":false}],"website":"","libraryItems":[],"transitions":[],"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"program":{"acronym":"SBIR/STTR","active":true,"description":"
The NASA SBIR and STTR programs fund the research, development, and demonstration of innovative technologies that fulfill NASA needs as described in the annual Solicitations and have significant potential for successful commercialization. If you are a small business concern (SBC) with 500 or fewer employees or a non-profit RI such as a university or a research laboratory with ties to an SBC, then NASA encourages you to learn more about the SBIR and STTR programs as a potential source of seed funding for the development of your innovations.
The SBIR and STTR programs have 3 phases:
The SBIR and STTR Phase I contracts last for 6 months with a maximum funding of $125,000, and Phase II contracts last for 24 months with a maximum funding of $750,000 - $1.5 million.
Opportunity for Continued Technology Development Post-Phase II:
The NASA SBIR/STTR Program currently has in place two initiatives for supporting its small business partners past the basic Phase I and Phase II elements of the program that emphasize opportunities for commercialization. Specifically, the NASA SBIR/STTR Program has the Phase II Enhancement (Phase II-E) and Phase II eXpanded (Phase II-X) contract options.
Please review the links below to obtain more information on the SBIR/STTR programs.
Provides an overview of the SBIR and STTR programs as implemented by NASA
Provides access to the annual SBIR/STTR Solicitations containing detailed information on the program eligibility requirements, proposal instructions and research topics and subtopics
Schedule and links for the SBIR/STTR solicitations and selection announcements
Federal and non-Federal sources of assistance for small business
Search our complete archive of awarded project abstracts to learn about what NASA has funded
Still have questions? Visit the program FAQs
","programId":73,"responsibleMd":{"acronym":"STMD","canUserEdit":false,"city":"","external":false,"linkCount":0,"organizationId":4875,"organizationName":"Space Technology Mission Directorate","organizationType":"NASA_Mission_Directorate","naorganization":false,"organizationTypePretty":"NASA Mission Directorate"},"responsibleMdId":4875,"stockImageFileId":36648,"title":"Small Business Innovation Research/Small Business Tech Transfer"},"leadOrganization":{"acronym":"GRC","canUserEdit":false,"city":"Cleveland","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":false,"linkCount":0,"organizationId":4860,"organizationName":"Glenn Research Center","organizationType":"NASA_Center","stateTerritory":{"abbreviation":"OH","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Ohio","stateTerritoryId":23},"stateTerritoryId":23,"naorganization":false,"organizationTypePretty":"NASA Center"},"supportingOrganizations":[{"canUserEdit":false,"city":"Eden Prairie","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"external":true,"linkCount":0,"organizationId":3949,"organizationName":"SVT Associates","organizationType":"Industry","stateTerritory":{"abbreviation":"MN","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Minnesota","stateTerritoryId":25},"stateTerritoryId":25,"ein":"522152956 ","naorganization":false,"organizationTypePretty":"Industry"}],"statesWithWork":[{"abbreviation":"MN","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Minnesota","stateTerritoryId":25},{"abbreviation":"OH","country":{"abbreviation":"US","countryId":236,"name":"United States"},"countryId":236,"name":"Ohio","stateTerritoryId":23}],"lastUpdated":"2018-10-10","releaseStatusString":"Released","viewCount":325,"endDateString":"Jul 2003","startDateString":"Jan 2003"}}