V.V. Komarov, A.G. Savina

Electrodynamic characteristics of single-mode specialized complex shaped microwave chambers intended for investigation of processes of electromagnetic (EM) waves interaction with dissipative liquid media are analyzed in present paper. Such systems are utilized in microwave chemistry, material science, radiation biology and etc. Considered waveguides and resonators with capacitance gap allow increasing penetration depth of EM field in sample and are compatible with coaxial and microstrip lines. Three dimensional numerical models of two microwave chambers have been built. Computer modeling was carried out using finite element technique and finite difference time-domain method. Dependences of reflection coefficient versus temperature of three liquid samples at 2450 MHz have been studied for waveguide-resonator cell on double-ridged waveguide. EM field patterns in the interaction region and S-parameters of reentrant cavity resonator filled with chemical substance С4Н9N at 915 MHz have been determined. Computer modeling results have shown high uniformity of samples heating and power efficiency of such systems

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