Imperial College London

Professor Stepan Lucyszyn, FIEEE

Faculty of EngineeringDepartment of Electrical and Electronic Engineering

Professor of Millimetre-wave Systems



+44 (0)20 7594 6167s.lucyszyn Website CV




Ms Susan Brace +44 (0)20 7594 6215




602Electrical EngineeringSouth Kensington Campus






BibTex format

author = {Lucyszyn, S and Robertson, ID},
doi = {10.1109/EUMA.1991.336501},
pages = {1154--1158},
publisher = {IEEE},
title = {An improved multi-layer quadrature coupler for MMICs},
url = {},
year = {2007}

RIS format (EndNote, RefMan)

AB - Abstract:A novel technique for significantly reducing the insertion loss of multi-layer quadrature couplers is presented. With previous broadside multi-layer couplers, realized on GaAs MMICs, the upper conducting layer track is overlayed exactly onto the much thinner lower conducting layer track - resulting in a high insertion loss. A new multi-layer structure is presented that has an upper track which is offset - so that the lower track can be plated-up with the much thicker metal from the upper track, thus, reducing the even-mode insertion loss. A coupler, with a centre frequency of 7.7GHz, incorporating this technique has been realized on a GaAs MMIC, with maximum dimensions of only 1.l×0.8mm. The resulting insertion loss at centre frequency is less than 1dB. The overall performance has been found to equally match that of the Lange coupler.
AU - Lucyszyn,S
AU - Robertson,ID
DO - 10.1109/EUMA.1991.336501
EP - 1158
PY - 2007///
SP - 1154
TI - An improved multi-layer quadrature coupler for MMICs
UR -
ER -