Title :
Application of ferroelectrics in phase shifter design
Author :
Kozyrev, A. ; Osadchy, V. ; Pavlov, A. ; Sengupta, L.
Author_Institution :
St. Petersburg Electrotech. Univ., St. Petersburg, Russia
Abstract :
The theoretical aspects of the design of optimal construction of microwave ferroelectric phase-shifter are discussed. The 30 GHz phase-shifter based on grounded coplanar waveguide with layered structure is under investigation. As a result expressions to determine the optimal construction of CPW ferroelectric phase-shifter and the suitable composition of ferroelectric film are derived. Continuous 0-360 degree phase shift and maximum insertion losses of 8 dB have been experimentally demonstrated by Ka-band ferroelectric phase-shifter. Further optimization of suitable ferroelectric film composition and phase-shifter sizes makes it possible to achieve a figure of merit /spl sim/80 deg/dB.
Keywords :
Coplanar waveguide components; Ferroelectric devices; Ferroelectric thin films; Losses; Microwave phase shifters; 30 GHz; Ka-band; ferroelectric film composition; grounded coplanar waveguide; insertion losses; layered structure; microwave ferroelectric phase-shifter; phase shifter design; phase-shifter sizes; Coplanar waveguides; Dielectric constant; Dielectric losses; Dielectric substrates; Ferroelectric films; Ferroelectric materials; Iron; Phase shifters; Phased arrays; Voltage control;
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.2000.861792
