{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:28:32Z","timestamp":1760243312374,"version":"build-2065373602"},"reference-count":27,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2014,9,12]],"date-time":"2014-09-12T00:00:00Z","timestamp":1410480000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Micromachines"],"abstract":"<jats:p>This paper presents the progress of monolithic technology for microwaveapplication, focusing on gallium nitride technology advances in the realization of integratedpower amplifiers. Three design examples, developed for microwave backhaul radios, areshown. The first design is a 7 GHz Doherty developed with a research foundry, while thesecond and the third are a 7 GHz Doherty and a 7\u201315 GHz dual-band combined poweramplifiers, both based on a commercial foundry process. The employed architectures, themain design steps and the pros and cons of using gallium nitride technology are highlighted.The measured performance demonstrates the potentialities of the employed technology, andthe progress in the accuracy, reliability and performance of the process.<\/jats:p>","DOI":"10.3390\/mi5030711","type":"journal-article","created":{"date-parts":[[2014,9,12]],"date-time":"2014-09-12T10:25:43Z","timestamp":1410517543000},"page":"711-721","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Evolution of Monolithic Technology for Wireless Communications: GaN MMIC Power Amplifiers For Microwave Radios"],"prefix":"10.3390","volume":"5","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7294-6773","authenticated-orcid":false,"given":"Vittorio","family":"Camarchia","sequence":"first","affiliation":[{"name":"Department of Electronics and Telecommunications, Politecnico di Torino, Corso Duca degli Abruzzi, 24, Torino 10129, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5759-9697","authenticated-orcid":false,"given":"Marco","family":"Pirola","sequence":"additional","affiliation":[{"name":"Department of Electronics and Telecommunications, Politecnico di Torino, Corso Duca degli Abruzzi, 24, Torino 10129, Italy"}]},{"given":"Roberto","family":"Quaglia","sequence":"additional","affiliation":[{"name":"Department of Electronics and Telecommunications, Politecnico di Torino, Corso Duca degli Abruzzi, 24, Torino 10129, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2014,9,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1109\/MMM.2009.932833","article-title":"Is microwave backhaul up to the 4G task?","volume":"10","author":"Little","year":"2009","journal-title":"IEEE Microw. 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