01733nam 2200397z- 450 9910346908503321202102111000021579(CKB)4920000000101437(oapen)https://directory.doabooks.org/handle/20.500.12854/40629(oapen)doab40629(EXLCZ)99492000000010143720202102d2011 |y 0engurmn|---annantxtrdacontentcrdamediacrrdacarrierAlGaN/GaN-HEMT power amplifiers with optimized power-added efficiency for X-band applicationsKIT Scientific Publishing20111 online resource (XI, 230 p. p.)Karlsruher Forschungsberichte aus dem Institut für Hochfrequenztechnik und Elektronik.3-86644-615-2 This work has arisen out of the strong demand for a superior power-added efficiency (PAE) of AlGaN/GaN high electron mobility transistor (HEMT) high-power amplifiers (HPAs) that are part of any advanced wireless multifunctional RF-system with limited prime energy. Different concepts and approaches on device and design level for PAE improvements are analyzed, e.g. structural and layout changes of the GaN transistor and advanced circuit design techniques for PAE improvements of GaN HEMT HPAs.Technology: general issuesbicsscAlGaN/GaN HEMTMMIC designpower amplifierpower-added efficiencyX-bandTechnology: general issuesKühn Jutta1318410BOOK9910346908503321AlGaN3033210UNINA01793nam 2200433z- 450 9910346762303321202102111000069288(CKB)4920000000100899(oapen)https://directory.doabooks.org/handle/20.500.12854/41060(oapen)doab41060(EXLCZ)99492000000010089920202102d2017 |y 0engurmn|---annantxtrdacontentcrdamediacrrdacarrierApplication-Specific Broadband Antennas for Microwave Medical ImagingKIT Scientific Publishing20171 online resource (X, 147 p. p.)Karlsruher Forschungsberichte aus dem Institut für Hochfrequenztechnik und Elektronik3-7315-0664-5 The goal of this work is the introduction of efficient antenna structures on the basis of the requirement of different microwave imaging methods; i.e. quantitative and qualitative microwave imaging techniques. Several criteria are proposed for the evaluation of single element antenna structures for application in microwave imaging systems. The performance of the proposed antennas are evaluated in simulation and measurement scenarios.Technology: general issuesbicsscAntennaAntenneHochfrequenzmedicalMicrowave imaging systemMikrowelleRadarUltra widebandTechnology: general issuesJalilvand Malyheauth1318587BOOK9910346762303321Application-Specific Broadband Antennas for Microwave Medical Imaging3033445UNINA