Background. A further increase in the speed of information transfer is determined by more stringent requirements for elements communication devices. One most important components such devices various filters, which are often made on basis dielectric resonators. Calculation parameters multi-section filters impossible without development theory their design. The filter based electrodynamic modell...

Abstract We developed a novel terahertz-wave detector fabricated on SiC platform implementing an InP/InGaAs Fermi-level managed barrier (FMB) diode. The FMB diode epi-layers were transferred substrate, and waveguide coupler filters monolithically integrated with Then, the chip was assembled in fundamental mixer module WR-3 rectangular-waveguide-input port. It exhibited minimum noise equivalent ...

This article presented the design of two filters SIW (Substrate Integrated Waveguide) in two different bands. Their conceptions were made by two different topologies. The first SIW filter with circular inductive post in the band [33-50] GHz on an RT / Duroid 5880 substrate permittivity 2.2, the simulated results of this filter have shown that the insertion loss lower than -0.4 dB within 3.5% ba...

A novel device, formed by a widely spaced periodic array of defects in a photonic bandgap crystal, is studied with the goal of designing a waveguide with a prescribed narrow bandwidth. Tunneling of radiation between the defect sites allows wave propagation along the line of the defects. An analytical study based on the weakly coupled cavity model is performed, and the dispersion relation omega(...

We report on a new synthesis method of reflection filters with multilayer and waveguide structures. The filter is characterized by bandwidth as small as ≤ 1 nm for effective use in wavelength-division-multiplexed optical communications. Both the transfer-matrix method and the Fourier transformation are employed to determine the filter reflection from a spatially varying refractive index. In con...

Results of energy and frequency measurements on the Twente Raman FEL are presented and discussed. A highest energy of 230 mJ was measured using a joule meter. The spectrum was determined using waveguide cutoff filters. These measurements generally showed a broad spectrum containing two or more peaks. Far from magneto-resonance this indicates that the radiation field grows at the upper as well a...

Evanescent mode substrate integrated waveguide (SIW) is one of the promising technologies for design of light-weight low-cost microwave components. Traditional realization methods used in the standard evanescent waveguide technology are often not directly applicable to SIW due to dielectric filling and small height of the waveguide. In this work, one of the realization methods of evanescent mod...

A semi-analytical method to analyze post-wall waveguides and circuits based on the model of two-dimensional photonic crystals formed by layered periodic arrays of circular cylinders is presented. The propagation constant of the fundamental TE mode, the attenuation constant due to the leakage loss and the effective width of an equivalent rectangular waveguide are calculated. Using the concept of...