Microwave dielectric structures for micromechanical alteration of frequency and phase characteristics

The report is devoted to the problem of the development of the basics of creating dielectric control of microwave devices with micromechanical way tuning, allowing use of piezoelectric or electrostrictive actuators for electromechanical tuning the characteristics. In contrast, electrical, magnetic and optical methods of tuning, micromechanical method preserves the high quality factor of the systems, has a wider tuning range of adjustment, and the use of dielectric materials has no restrictions on the fundamental operating frequency up to infrared range.

On the basis of the revealed laws the criteria to ensure the best tuning the microwave characteristics at the lowest possible movement of the metal or dielectric parts of the devices, which will ensure the minimum loss are developed.

The micromechanically tunable phase shifters based on partially-loaded dielectric waveguide, microstrip and coplanar transmission lines, the resonant elements based on strip lines, dielectric and shielded dielectric resonators are theoretically and experimentally investigated. The models of the devices are developed.

Developed new and improved existing methods for measuring the electrical parameters of dielectric materials and films.

  • Date: 07 June 2016
  • Time: 04:30 PM to 06:30 PM
  • Guest Attendance: 22
  • IEEE Member Attendance: 14

2016 IEEE 36th International Conference “Electronics and Nanotechnology” (Elnano-2016)

Martin Kirchner, Martin Rasche Raith GmbH, Dortmund, Germany Topic:

Martin Kirchner, Martin Rasche Raith GmbH, Dortmund, Germany Topic: “Focused electron beam technology for high resolution lithography and reverse engineering”

Prof. Alexander Nosich, O.Ya. Usikov Institute for Radiophysics and Electronics of National Academy of Science of Ukraine, IEEE Fellow, Kharkiv, Ukraine Topic: “Frequency and polarization selectivity of a graphene strip grating in a dielectric slab in the THz range”
Prof. Alexander Nosich, O.Ya. Usikov Institute for Radiophysics and Electronics of National Academy of Science of Ukraine, IEEE Fellow, Kharkiv, Ukraine Topic: “Frequency and polarization selectivity of a graphene strip grating in a dielectric slab in the THz range”

Conference topics:

1. Micro- and nanoelectronics: nanostructures and nanotechnology in electronics; components of micro- and nanoelectronics; micro- and nanosystems in electronics; mathematical simulation of electronic components, devices and systems.
2. Biomedical electronics and signal processing: electronic nanotechnology in biomedicine; biocomponents of nanosystems; nanobiosystems simulation; electronics for monitoring, diagnostics and treatment; digital processing and analysis of biomedical signals; interactions between physical fields and biological objects.
3. Electronic systems: power electronics; airborne electronic systems; telecommunication and acoustoelectronic systems; radar systems and signal processing; remote sensing; multistatic electronic systems; polarimetric and doppler techniques.

Spatially inhomogeneous magnetic field in the technology of radio frequency hyperthermia of malignant tumours

The seminar was devoted to study the effect of spatially inhomogeneous electromagnetic field on the synergies in the therapy of malignant tumours and their model-based processes, physical and technical principles of construction applicators antennas for RF mild hyperthermia at which temperature rise in a physiologically acceptable range no more than 1.5-2 centigrade degree. Synergistic factors in mild radiofrequency hyperthermia of malignant tumours are heterogeneous tumour structure, chemotherapy drug, spatially inhomogeneous electromagnetic field, spatially distributed temperature induced.
The main result of the investigations is to justify the feasibility of using spatially inhomogeneous electromagnetic fields in biological tissue irradiated as a synergistic factor of influence.
Based on the model and the experimental data, the spatial in homogeneity of the field in the context of mild radiofrequency hyperthermia of malignant tumours should be characterized by the number of spatial patterns (field clusters) per irradiation area, their size and the effective difference between the two amplitudes.
As a result of a new approach to the design of the radiating antenna applicators, generating a spatially inhomogeneous electromagnetic radiation in the near-field area.

  • Date: 23 February 2016
  • Time: 02:30 PM to 04:30 PM
  • Guest Attendance: 21
  • IEEE Member Attendance: 8