In this article, a new tri-band bandpass filter, operating at 2-2.6 GHz, 3.5-4.5 GHz and 5-5.8 GHz for GSM, WiMAX and WLAN application is proposed. Two quad sections SIR resonators and corresponding feeding structures are introduced to enhance the tuneable range of operating frequencies. Using source/load coupling can realize two controllable transmission zeros around each operating band. The f...

In this article we discuss the design and implementation of high-power-microwave (HPM) traveling-wave antenna. The antenna is designed to be driven by a high-power, single-shot signal generator with 1 ns pulse-width at the -3 dB power points, and peak voltage of up to 100 kV. Since the signal generator is equipped with an air-filled coaxial-waveguide output, a coaxial-waveguide to parallel-plat...

In this article, an improved model for the beam-wave interaction of sheet beam in traveling wave tubes (TWTs) considering ohmic losses and reflections is presented. The are obtained by field analysis equivalent method. space charge magnetic derived from active Helmholtz's equation. An algorithm to obtain S-matrix circuit method relativistic Boris applied accelerate macroparticles. exchanged pow...

BACKGROUND AND PURPOSE The corticospinal tract (CST) and corticoreticular pathway (CRP) are known to be important neural tracts for motor development. However, little is known about the difference in maturation of the CST and CRP. In this study, using diffusion tensor imaging (DTI), we investigated maturation of the CST and CRP in typically developed children and normal healthy adults. METHOD...

Recently, the development of electronic and electric devices has caused an increase in the level of electromagnetic radiation; therefore, the demand for protection against this danger has increased. There are many ways how to ensure the protection of device against electromagnetic interference; however, this paper is devoted just one of the ways, the shielding. The paper is focused on calculati...

This paper deals with the optimization of coaxial filters using Tuning Space Mapping (TSM) method implemented to CST environment. The function of fine and coarse model and their link between each other is explained. In addition, supporting macros programmed in VBA language, which are used for maximum efficiency of the optimization from the user ́s point of view, are mentioned. Macros are program...