1. Summary Microwave indoor propagation offers a good opportunity for object positioning. The use of the pulse radar method for measuring distances and angles are quite unsuitable for indoor applications. The resolution of this method is too low and there is a minimal distance requirement of the pulse radar measurement that is usually higher than the room size. In this paper the phase method of...

The control of physical properties by external fields is essential in many contemporary technologies. For example, conductance can be controlled by a gate electric field in a field effect transistor, which is a main component of integrated circuits. Optical phenomena induced by an electric field such as electroluminescence and electrochromism are useful for display and other technologies. Contr...

We study the propagation of quasidiscrete microwave solitons in a nonlinear left-handed coplanar waveguide coupled with split-ring resonators. By considering the relevant transmission line analog, we derive a nonlinear lattice model which is studied analytically by means of a quasidiscrete approximation. We derive a nonlinear Schrödinger equation, and find that the system supports bright envelo...

Guiding characteristics along with field distributions for different modes in a rectangular waveguide are numerically estimated using HFSS software when it is placed in free space. A comparative analysis is made for propagation constant, guided wavelength and characteristic impedance at C, X and Ku band to observe the deviation from well-known theoretical profiles. Strength of electric and magn...

[7] 1.. Lewin, “Propagation in curved and twisted waveguides of rectam jyrlar cross-section,” in Proc. Inst. E[ectr. Eng., 1955, vol. 102, B,’ 1, pp. 75-80. 1.. Lewin and T. Ruehle, “Propagation in twisted square waveguide,” IEEE Trans. Microwave Theoiy Tech., vol. MTT-28, pp. 44–48, 1980. 1.. Lewin, Theory of Waveguides. London: Newnes-Butherworths, 1.975,pp. 96-101. 1.. Lew~n, D. C. Chang, an...

Effective complex permittivity measurements of materials are important in microwave engineering and microwave chemistry. The BP (Back Propagation) neural network computational module has been applied to microwave technology and becomes a useful tool recently. A neural network can be trained to learn the behavior of an effective complex permittivity of material under microwave irradiation in an ...

There has been a surge of interest in the subwavelength confinement of electromagnetic fields. It is well known that, in optics, subwavelength confinement can be obtained from surface plasmon (quasielectrostatic) oscillations. In this article, we propose to realize subwavelength confinement in microwaves by using dipolarmode (quasimagnetostatic) magnon oscillations in ferrite particles. Our stu...

We report direct visualization of gigahertz-frequency Lamb-wave propagation in aluminum nitride phononic circuits by transmission-mode microwave impedance microscopy (TMIM). Consistent with finite-element modeling, the acoustic eigenmodes both a horn-shaped coupler and subwavelength waveguide are revealed TMIM images. Using fast Fourier-transform filtering, we quantitatively analyze loss indivi...

We demonstrate a novel route to achieving highly efficient and strongly confined spoof surface plasmon polaritons (SPPs) waveguides at subwavelength scale enabled by planar staggered plasmonic waveguides (PSPWs). The structure of these new waveguides consists of an ultrathin metallic strip with periodic subwavelength staggered double groove arrays supported by a flexible dielectric substrate, l...