Investigation of tunable structures with liquid dielectrics for the microwave range

Vitaliy G. Shevchenko; Vladimir N. Apletalin; Anatoliy T. Ponomarenko; Valerii Pavlovich Maltsev; Yuri N. Kazantsev

doi:10.1117/12.240446

20 May 1996 Investigation of tunable structures with liquid dielectrics for the microwave range

Vitaliy G. Shevchenko, Vladimir N. Apletalin, Anatoliy T. Ponomarenko, Valerii Pavlovich Maltsev, Yuri N. Kazantsev

Proceedings Volume 2722, Smart Structures and Materials 1996: Smart Electronics and MEMS; (1996) https://doi.org/10.1117/12.240446
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

Tunable electromagnetic wave absorbers for the microwave range comprise polymer-liquid composites, made up of structures of definite shape from low dielectric constant polymer dielectric, filled with polar liquids. Tuning of reflection coefficient is performed in several ways: filling or removal of liquid from the structure, changing composition or temperature of liquid, etc. Effective absorption of electromagnetic waves by these structures in a wide range of frequencies is realized in case frequency dependence of dielectric constant of the liquid is such that for the whole range the condition of resonance absorption is fulfilled. The advantages of polar liquid dielectrics as absorbing media are demonstrated. Absorbing properties of structures with polar liquids and solutions of different salts are compared. Reflection coefficients for several structures of `dielectric on metal' type were measured.

Citation Download Citation

Vitaliy G. Shevchenko, Vladimir N. Apletalin, Anatoliy T. Ponomarenko, Valerii Pavlovich Maltsev, and Yuri N. Kazantsev "Investigation of tunable structures with liquid dielectrics for the microwave range", Proc. SPIE 2722, Smart Structures and Materials 1996: Smart Electronics and MEMS, (20 May 1996); https://doi.org/10.1117/12.240446

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