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Wide-band lumped-element quadrature 3-dB couplers in microstrip

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2 Author(s)
D. P. Andrews ; Vectawave Technol. Ltd., Ryde, UK ; C. S. Aitchison

A design procedure for wide-band quadrature 3-dB couplers at microwave frequencies is presented in this paper, wherein lumped elements are incorporated into a microstrip circuit. Design examples for an octave-band coupler and a one-and-one-half octave-band coupler are presented. The topologies presented offer a convenient and cost-effective solution to tight coupling problems, currently solved using distributed circuits

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:48 ,  Issue: 12 )