Title :
A 24 GHz PHEMT-based oscillator
Author :
Lewandowski, Arkadiusz ; Kompa, Günter ; Mwema, Wilfred ; Wiatr, Wojciech
Author_Institution :
Inst. of Electron. Syst., Warsaw Univ. of Technol., Poland
Abstract :
Presents a systematic nonlinear procedure for designing microwave oscillators utilising a nonlinear PHEMT model, the negative resistance approach and the describing function concept. The procedure is applied in the design of a 24 GHz oscillator which is then realised in hybrid technology. Measurement results show -6% shift in the frequency but an acceptable agreement in the output power. A detailed analysis shows that the frequency shift arises mainly from inadequate CAD models in the K-band, for the microstrip components employed in the design.
Keywords :
HEMT integrated circuits; III-V semiconductors; MMIC oscillators; circuit CAD; circuit optimisation; circuit stability; gallium arsenide; microstrip circuits; negative resistance circuits; 24 GHz; CAD models; GaAs; K-band; MMIC; PHEMT-based oscillator; describing function concept; hybrid technology; microstrip components; microwave oscillators; negative resistance approach; nonlinear PHEMT model; output power; systematic nonlinear procedure; Design automation; Electrical resistance measurement; Frequency measurement; K-band; Microstrip components; Microwave oscillators; PHEMTs; Power generation; Power measurement; Power system modeling;
Conference_Titel :
Microwaves, Radar and Wireless Communications, 2002. MIKON-2002. 14th International Conference on
Print_ISBN :
83-906662-5-1
DOI :
10.1109/MIKON.2002.1017870
