Title :
Ceramic-polymer ferroelectric materials for antenna applications
Author :
Yashchyshyn, Yevhen ; Modelski, Jozef ; Szafran, Mikolaj
Author_Institution :
Inst. of Radioelectron., Warsaw Univ. of Technol., Poland
Abstract :
Ceramic-polymer composites with modified ferroelectric powder Ba0.65Sr0.35TiO3 and an appropriate polymer have been synthesized and investigated. A time-domain method for microwave measurements of the ceramic-polymer material parameters has been also developed. As an example of a possible use of the ceramic-polymer ferroelectric material, a new microstrip electrically controllable traveling-wave antenna is presented. The feasibility of dielectric scanning (changing the direction of the beam by varying the relative permittivity of the electronically controlled ceramic-polymer composite) is investigated. It shows that the beam angle changes more than 30° when a DC bias field of 200 V is applied.
Keywords :
antenna radiation patterns; barium compounds; ferroelectric ceramics; ferroelectric materials; microstrip antennas; microwave materials; permittivity; polymers; scanning antennas; strontium compounds; 200 V; 7.5 GHz; Ba0.65Sr0.35TiO3; antenna applications; antenna patterns; ceramic-polymer composites; ceramic-polymer ferroelectric materials; dielectric scanning; electrically controllable traveling-wave antenna; ferroelectric powder; microstrip antenna; microwave measurements; relative permittivity; time-domain method; Antenna measurements; Dielectric measurements; Ferroelectric materials; Microstrip antennas; Microwave theory and techniques; Permittivity measurement; Polymers; Powders; Strontium; Time domain analysis;
Conference_Titel :
Antenna Theory and Techniques, 2003. 4th International Conference on
Print_ISBN :
0-7803-7881-4
DOI :
10.1109/ICATT.2003.1238838
