doc. Ing. Milan Polívka, Ph.D.

Artificially generated electromagnetic materials from passive structures as well as active sub-circuits (artificial magnetic surfaces, retention strings, resonators with zero and negative resonances, non-Foster circuits, etc.) allow miniaturization of dimensions and enhancement of electrical properties of radiators and reflectors. The aim of the subject is to design and analyze the properties of selected prospective structures using simplified analytical procedures as well as full-wave electromagnetic analysis using commercial EM field simulators.

Chipless radiofrequency identification (RFID) is a fast developing technology for automatic identification and tracking of objects with capabilities of integratiion of sensing physical quantities that does not use electronic integrated circuits (chips) and promises, at least partially and in specific applications, to substitute optical barcodes. Finding optimal topology of chipless transponders, increasing bit capacity in a unit area, improving reading reliability of coded information, development of suitable time and frequency based method for data coding and sensing physical quantities are challenges to be solved in the near future. The design and analysis of these structures will include both simplified analytical procedures and numerical simulations using commercial EM simulation software.

The essence of the topic is the research and development of structures and methods of radiofrequency wireless sensing and evaluating of physical (electrical as well as non-electrical) quantities in a complex environment, which can be constituted by lossy metallic as well as dielectric structures (e.g. metallic layers and objects, liquids, and human tissue). The existence of such environment in the close vicinity of the radiating and sensing structures for the distant sensing represents complex and topical problem which has not been solved satisfactory yet.