Title :
Design and realisation of a novel balanced self-oscillating mixer topology
Author :
Bourhill, N. ; Iezekiel, S. ; Steenson, D.P.
Author_Institution :
Dept. of Electron. & Electr. Eng., Leeds Univ., UK
Abstract :
A balanced self-oscillating mixer is proposed and investigated as an up-converter. The circuit consists of a pair of AlGaAs/GaAs 10×45 μm pHEMTs, which oscillate in anti-phase at 7.5 GHz using the extended resonance effect. The conversion gain is 3.6 dB and the second order intermodulation is reduced by 18.3 dB. The output of the two oscillators are combined using a Wilkinson power divider resulting in an LO to RF isolation of over 40 dB
Keywords :
HEMT circuits; III-V semiconductors; aluminium compounds; gallium arsenide; intermodulation; microwave frequency convertors; microwave mixers; microwave oscillators; power dividers; 3.6 dB; 7.5 GHz; AlGaAs-GaAs; AlGaAs/GaAs PHEMT circuit; LO-to-RF isolation; Wilkinson power divider; anti-phase oscillation; balanced self-oscillating mixer; conversion gain; extended resonance effect; second-order intermodulation; up-converter; Circuit topology; Distributed parameter circuits; Filtering; MMICs; Mixers; Oscillators; PHEMTs; Power transmission lines; Radio frequency; Resonance;
Conference_Titel :
High Performance Electron Devices for Microwave and Optoelectronic Applications, 2000 8th IEEE International Symposium on
Conference_Location :
Glasgow
Print_ISBN :
0-7803-6550-X
DOI :
10.1109/EDMO.2000.919044
