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GaN-based amplifiers for wideband applications

: Schuh, P.; Sledzik, H.; Reber, R.; Widmer, K.; Oppermann, M.; Musser, M.; Seelmann-Eggebert, M.; Kiefer, R.


International journal of microwave and wireless technologies 2 (2010), No.1, pp.135-141
ISSN: 1759-0795
ISSN: 1759-0787
Journal Article
Fraunhofer IAF ()
AlGaN/GaN; MMIC; wideband; HPA; LNA

Different wideband amplifiers, hybrid designs at lower frequencies, and monolithically integrated circuits (MMIC) at higher frequencies were designed, fabricated, and measured. These amplifiers are all based on AlGaN/GaN HEMT technology. The future applications for these types of amplifiers are mainly electronic warfare (EW) applications. Novel communication jammers and especially active electronically scanned array EW systems have a high demand for wideband high power amplifiers. The second application also needs high robust low noise amplifiers for its receive path. Output power levels of 38 W for hybrid amplifiers at lower frequencies up to 6 GHz and 15 W for the MMIC power amplifiers at higher frequencies are measured. With these building blocks, novel EW system approaches can be investigated.