Title :
A Monolithic Voltage Controlled Directional Coupler
Author :
Cryan, M.J. ; Shepherd, P.R. ; Pennock, S.R.
Author_Institution :
School of Electronic and Electrical Engineering, University of Bath, Claverton Down, Bath, BA2 7AY.
Abstract :
A wide FET is considered as a voltage controlled directional coupler. A model for the device has been developed taking into account the distributed nature of the device. Measured and modelled six port S-parameters for three such devices are presented from 0.1-20GHz. Directional coupling is observed between source and drain lines, the directivity of which is tunable by d.c. gate bias. Tunable directivities of greater than 20dB from 6 to 12GHz are predicted for the deembedded device.
Keywords :
Capacitance; Directional couplers; Electrical resistance measurement; FETs; Finite difference methods; MMICs; Power system modeling; Scattering parameters; Strips; Voltage control;
Conference_Titel :
Microwave Conference, 1994. 24th European
Conference_Location :
Cannes, France
DOI :
10.1109/EUMA.1994.337301
