Received Sep 24, 2017 Revised Dec 27, 2017 Accepted Jan 16, 2018 This paper presents two dual-mode rectangular ring resonators, designed at RF frequency above 20 GHz for bandpass filter applications. The first resonator is designed at 20 GHz using single layer microstrip technology, on Rogers Duroid TMM10 substrate with the following characteristics; relative dielectric constant (εr) = 9.2, sub...

In this paper, the design of rectangular dielectric resonator antenna (RDRA) with coaxial probe and microstrip line feed arrangements and corresponding return loss vs. frequency characteristics and radiation performance in C-band of microwave frequencies using finite integration method (CST Microwave Studio) and verified by finite element method (Ansoft High Frequency Structure Simulator) are p...

Hexagonal dual-mode cavity and its application to substrate integrated waveguide (SIW) filter are presented. The hexagonal SIW resonator which can combine flexibility of rectangular cavity and performance of circular cavity is convenient for dual-mode bandpass filters design. By introducing coupling between source and load, the filter not only has good selectivity due to two controllable transm...

This paper introduced a new low cost, compact and robust microstrip antenna based on metamaterial split ring resonator property to replace the existed antenna by small size and multiband Frequency antenna. The proposed antenna is designed with multi rectangular patches and simulated for different frequency. By using the metamaterial property, the bandwidth of the antenna has been improved. The ...

A new technique to evaluate the dielectric constant and loss factor of a homogeneous dielectric material using rectangular shaped perturb cavity has been developed. The values of S-parameters are measured experimentally by placing the sample in the center of the cavity resonator. Sample under test is fabricated in the form of a cylinder. The real and imaginary part of the permittivity can be th...

Because a resonator with perfect electrically conducting (PEC) walls has no complications with absorbing boundary conditions and, for canonical geometries, the resonant frequencies are trivial to find, resonators are often used for analyzing the performance of finite-difference time-domain (FDTD) methods. However, when testing the performance of boundary implementations in an FDTD scheme, one s...

The Hamiltonian H of an open quantum system is non-Hermitian. Its complex eigenvalues E(R) are the poles of the S matrix and provide both the energies and widths of the states. We illustrate the interplay between Re(H) and Im(H) by means of the different interference phenomena between two neighboring resonance states. Level repulsion may occur along the real or imaginary axis (the latter is cal...

High performance refractive index sensors are of important significance in numerous sensing applications including chemical, air and biophotonics. Among them, the ones with high sensitivity large quality factor especially critical. Here, we propose a sensor based on slotted silicon ring resonator, which inner outer rings made deformed subwavelength grating (SWG) waveguide trapezoidal dielectric...