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X-band T/R-module front-end based on GaN MMICs

: Schuh, P.; Sledzik, H.; Reber, R.; Fleckenstein, A.; Leberer, R.; Oppermann, M.; Quay, R.; Raay, F. van; Seelmann-Eggebert, M.; Kiefer, R.; Mikulla, M.


International journal of microwave and wireless technologies 1 (2009), No.4, pp.387-394
ISSN: 1759-0795
ISSN: 1759-0787
Journal Article
Fraunhofer IAF ()
AlGaN/GaN; MMIC; T/R module; x-Band

Amplifiers for the next generation of T/R modules in future active array antennas are realized as monolithically integrated circuits (MMIC) on the basis of novel AlGaN/GaN (is a chemical material description) high electron mobility transistor (HEMT) structures. Both low-noise and power amplifiers are designed for X-band frequencies. The MMICs are designed, simulated, and fabricated using a novel via-hole microstrip technology. Output power levels of 6.8 W (38 dBm) for the driver amplifier (DA) and 20 W (43 dBm) for the high-power amplifier (HPA) are measured. The measured noise figure of the low-noise amplifier (LNA) is in the range of 1.5 dB. A T/R-module front-end with mounted GaN MMICs is designed based on a multi-layer low-temperature cofired ceramic technology (LTCC).