Title :
Analysis and design of ideal non symmetrical coupled microstrip directional couplers
Author :
Emery, T. ; Chin, Y. ; Lee, H. ; Tripathi, V.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA
Abstract :
Ideal directional couplers consisting of coupled asymmetric lines in an inhomogeneous medium have been realized by equalizing the inductive and capacitive coefficients of coupling. Analytical results have been verified numerically by computer simulation of the idealized distributed parameter systems and experimentally by comparing the scattering parameters of directional couplers designed with and without the techniques for improving coupler performance presented. Examples of high-directivity asymmetric couplers consisting of various planar and layered structures and presented together with experimental results for 6-dB couplers on alumina.<>
Keywords :
directional couplers; strip line components; capacitive coefficients; computer simulation; coupled asymmetric lines; distributed parameter systems; ideal non symmetrical coupled microstrip directional couplers; inductive coefficients; inhomogeneous medium; layered structures; planar structures; scattering parameters; Computer simulation; Coupled mode analysis; Coupling circuits; Directional couplers; Impedance; Microstrip; Mutual coupling; Performance analysis; Scattering parameters; Voltage;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38731
