Title :
Physicochemical Aspects of the Development of Microwave Dielectrics
Author :
Belous, A.G. ; Ovchar, O.V.
Author_Institution :
V.I.Vernadskii Inst. of Gen. & Inorg. Chem., NAS of Ukraine, Kyiv
Abstract :
Microwave technology uses widely various dielectric materials. Dielectrics, the use of which reduces substantially the overall dimensions of microwave circuits, i.e. dielectrics with high permittivity (epsiv>20), are of special interest. The miniaturization effect is based on the epsiv1/2 -fold reduction of electromagnetic wave length in dielectric; the planar dimensions of microwave microcircuits decrease by a factor of epsiv. Dielectrics with high permittivity are used as dielectric resonators, microcircuit substrates, filter capacitors, etc in microwave technology. Microwave dielectrics can be developed in several different ways, for example on the basis of monophase systems and by creating multiphase compositions. Monophase microwave dielectrics are developed on the basis of solid solutions using aliovalent substitution in one of the crystal sublattices and by making one of the sublattices mobile. At the same time, microwave dielectrics based on multiphase compositions can be developed by creating multi-layer resonant elements and by using volume temperature compensation. This paper will discuss briefly the above methods for developing microwave dielectrics in terms of literature data and the results by the author.
Keywords :
dielectric materials; microwave circuits; microwave materials; microwave technology; permittivity; dielectric materials; microwave dielectrics; microwave microcircuits; microwave technology; miniaturization effect; monophase systems; multiphase compositions; permittivity; physicochemical aspects; Capacitors; Dielectric materials; Dielectric substrates; Electromagnetic scattering; Microwave circuits; Microwave filters; Microwave technology; Permittivity; Resonator filters; Solids;
Conference_Titel :
Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves and Workshop on Terahertz Technologies, 2007. MSMW '07. The Sixth International Kharkov Symposium on
Conference_Location :
Kharkov
Print_ISBN :
1-4244-1237-4
DOI :
10.1109/MSMW.2007.4294822