Title :
Ferroelectric-ferrite tunable phase shifters
Author :
Kirchoefer, S.W. ; Pond, J.M. ; Newman, H.S. ; Won-Jeong Kim ; Horwitz, J.S.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
Abstract :
Coplanar waveguide transmission lines fabricated on tunable substrates are being developed for use as true time delay phase shifters. We have fabricated such devices on substrates composed of ferroelectric thin films as well as ferroelectric thin films overlaying ferrite films. These ferroelectric thin film CPW transmission lines have exhibited good tuning properties as evidenced by the differential phase shift while maintaining reasonable losses. The ferroelectric-ferrite structures exhibit tuning which is equally dependent on magnetic and electric field biasing.
Keywords :
Coplanar waveguide components; Delays; Ferrite phase shifters; Ferroelectric devices; Ferroelectric thin films; Losses; Microwave phase shifters; coplanar waveguide transmission lines; differential phase shift; ferroelectric thin films; ferroelectric-ferrite tunable phase shifters; field biasing; losses; true time delay phase shifters; tunable substrates; Coplanar transmission lines; Coplanar waveguides; Delay effects; Ferrite films; Ferroelectric materials; Phase shifters; Propagation losses; Substrates; Thin film devices; Transistors;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.861793
