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This paper describes a method for tuning an HTS filter at the cryogenic temperature. Sonnet software was used for simulating the distribution of current density. Dielectric tuning screws were used to regulate the redistribution of electromagnetic field, so that the response characteristics of the filter can be improved. For matching the designed result, this technique allows correcting the deviation...
Microstrip patch antennas mounted over a high impedance EBG substrate within and outside its main bandgap are studied The structure is equivalent to a new microstrip antenna, where the conducting ground plane is replaced by a high impedance EBG layer. Initially, the bandgaps of the dielectric covered EBG structure are determined. Then, patch antennas are placed over the dielectric cover and designed...
A novel simple anisotropic effective medium method (SAEM) based on local correction is presented in this paper by taking into account the physical effects of the partial material fulfillment on the permittivity and permeability of the distorted cells. It reduces the staircasing errors significantly and introduces physical insight, which proves to be efficient and straightforward to implement. The...
Many efforts have been made to find materials with high dielectric constant for the application of RF capacitive shunt switch in order to obtain large down-state capacitance and therefore high isolation. In this work, HfO2 dielectric was suggested for the application of RF shunt switch. The HfO2 dielectric prepared in this work had the breakdown field higher than 20 MV/cm. The RF switch using 45-nm-thick...
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