title: Impedance matching of a coaxial antenna for microwave in-situ processing of polluted soils.
abstract: The present paper is focused on the minimization of return loss of a slotted coaxial radiator proposed for a decontamination system for soils contaminated by volatile or semi-volatile organic compounds such as oils or fuels. The antenna upgrade is achieved by coating it with a 5 mm thick Teflon layer. The electromagnetic characteristics reflection coefficient and power density distribution around the antenna surrounded by soils with different moisture levels are analyzed numerically. Simplified analytical approaches are employed to accelerate the optimization of the given antenna for microwave heating systems. The improved antenna design shows a good matching of the antenna to the surrounding soil with varying moisture levels. This ensures a high efficiency of the proposed in-situ soil decontamination system.
authors.affiliation: Karlsruhe Institute of Technology (KIT), Institut für Hochfrequenztechnik und Elektronik, Kaiserstrassle 12, 76131 Karlsruhe, Germany.
authors.forename: Mario
authors.initials: M
authors.lastname: Pauli
authors.affiliation: Karlsruhe Institute of Technology (KIT), Institut für Hochfrequenztechnik und Elektronik, Kaiserstrassle 12, 76131 Karlsruhe, Germany.
authors.forename: Thorsten
authors.initials: T
authors.lastname: Kayser
authors.affiliation: Karlsruhe Institute of Technology (KIT), Institut für Hochfrequenztechnik und Elektronik, Kaiserstrassle 12, 76131 Karlsruhe, Germany.
authors.forename: Werner
authors.initials: W
authors.lastname: Wiesbeck
authors.affiliation: Saratov State Technical University, Radio Engineering Department, 410054 Saratov, Russia.
authors.forename: Vyacheslav
authors.initials: V
authors.lastname: Komarov
mesh_terms: D003666:Decontamination / Q000295:instrumentation*; D017097:Electric Impedance; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006361:Heating / Q000295:instrumentation*; D008872:Microwaves; D012989:Soil Pollutants / Q000302:isolation & purification* / Q000528:radiation effects*; D014159:Transducers
chemical_list: D012989:Soil Pollutants