Title :
Analysis and design of microstrip-slot line for phase shifting applications
Author :
El-Sharawy, El-Badawy ; Jackson, Robert W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA
fDate :
3/1/1990 12:00:00 AM
Abstract :
The analysis and design of printed phase shifters based on the microstrip line are described. A spectral-domain analysis is presented where the necessary Green´s functions are formulated using the transmission matrix technique. The nonreciprocal characteristics for single-layer and multilayer structures are studied. Microstrip-slot in a multilayer structure of ferrite and high-dielectric material is found to have considerably more nonreciprocity than microstrip-slot for microstrip in a single-layer structure. Over 65°/cm is predicted for certain optimized designs. This, in addition to the 50-Ω design capability of the line, makes the microstrip-slot line a suitable choice for phase shifting applications. A multilayer microstrip-slot line was constructed on a rectangular ferrite toroid. Differential phase shifts of roughly 45°/cm were measured over a 6.0-8.5-GHz frequency range. These results are in good agreement with the analysis
Keywords :
Green´s function methods; ferrite applications; phase shifters; strip line components; 6 to 8.5 GHz; Green´s functions; SHF; high-dielectric material; microstrip-slot line; multilayer structures; nonreciprocal characteristics; optimized designs; phase shifting applications; printed phase shifters; rectangular ferrite toroid; single-layer structure; spectral-domain analysis; transmission matrix technique; Coplanar waveguides; Dielectric substrates; Ferrites; Green´s function methods; Impedance; Microstrip; Nonhomogeneous media; Phase measurement; Phase shifters; Transmission line matrix methods;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
