Title :
Coplanar waveguide and slot line on magnetic substrates: analysis and experiment
Author :
El-Sharawy, El-Badawy ; Jackson, Robert W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
fDate :
6/1/1988 12:00:00 AM
Abstract :
A full-wave analysis is presented for coplanar waveguide (CPW) and slotline phase shifters on magnetic substrates. The analysis is based on a multilayer Green´s function which is formulated using a transmission matrix approach. This approach is modified so that its computational efficiency is increased by deriving the transmission matrices for dielectric and ferrite slabs in a closed form. The Green´s function is then applied to the full-wave analysis of a slotline and CPW on infinite-width substrates. Several different multilayered configurations are investigated with respect to their nonreciprocal phase-shift properties. Perfectly conducting sidewalls are then added to the analysis and the resulting configuration is used to study the effect of various CPW parameters on differential phase shift. An experimental structure built on the surface of rectangular ferrite toroid is described and its differential phase analysis compared to measurements. Calculated and measured results are in good agreement
Keywords :
Green´s function methods; phase shifters; waveguide theory; CPW; computational efficiency; coplanar waveguide; dielectric slabs; differential phase shift; ferrite slabs; full-wave analysis; infinite-width substrates; magnetic substrates; multilayer Green´s function; nonreciprocal phase-shift properties; perfectly conducting sidewalls; phase shifters; rectangular ferrite toroid; slot line; slotline; transmission matrix; Coplanar waveguides; Dielectric substrates; Ferrites; Green´s function methods; Magnetic analysis; Magnetic multilayers; Phase shifters; Slotline; Toroidal magnetic fields; Transmission line matrix methods;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
