We demonstrate a band-pass resonator in the terahertz (THz) range, based on a frequency-selective designer reflector. The resonator consists of a parallel-plate waveguide, a designed groove pattern cut into the output facet of each plate, and a reflecting mirror. The patterned facet supports a spoof surface plasmon mode, which modifies the reflectivity at the waveguide output facet by interacti...

A two-dimensional (2D) diffraction model for the calculation of the diffraction field in 2D space and its applications to terahertz parallel-plate waveguide power splitters are proposed in this paper. Compared with the Huygens-Fresnel principle in three-dimensional (3D) space, the proposed model provides an approximate analytical expression to calculate the diffraction field in 2D space. The di...

In this study, an efficient power combiner for mm-wave frequency transmitters is investigated. The based on a parallel plate waveguide (PPW) excited with multiple feeds. Doherty scheme also integrated in the proposed concept, to increase efficiency of amplifiers when implementing amplitude modulation. advantage PPW respect other concepts, example, ones substrate-integrated waveguide, wider band...

In this article, we propose a hybrid glide-symmetric metasurface which presents an electromagnetic bandgap (EBG) behavior at the $Ka$ -band. The innovative part of work is nature periodic structure, implemented with holes on two different technologies: printed circuit board (PCB) and metallic waveguide. These avoid propagat...

We have characterized the terahertz (THz) vibrational spectroscopy of organic polycrystalline thin films using the new experimental technique of waveguide terahertz time domain spectroscopy (waveguide THz-TDS). The organic materials used in this study are tetracyanoquinodimethane (TCNQ) and 1,3-dicyanobenzene (13DCB). For each material, a thin film is cast onto one of the inner surfaces of a me...

SUMMARY The Fourier transform technique is applied to derive an expression for the aperture admittance of a ground-plane-mounted, transverse electric and magnetic (TEM) mode-excited parallel-plate waveguide illuminating a perfectly conducting sheet. aperture admittance expression, an equivalent circuit is developed. It is shown that there is a 1:l correspondence between elements of the equivale...