A set of hybrid microstrip patch and semi-circular cavity antennas is introduced. The semi-circular cavity is implemented using Half-mode Substrate Integrated Waveguide (HMSIW) technique. Different shapes of patch include rectangular, semi-circular and equilateral triangular are excited using proximity effect by the circular SIW cavity at its TM010 mode of operation. The whole structures have b...

A small 4-cavity assembly designed to operate at W-band was built using OFE copper parts machined by wire and plunge EDM proocesses. The machined pieces were then diffusion bonded together. A cutaway section of one the cavity modules is shown in figure 1. Each of the four cavities approximates a one-half guided wavelength at 90 Ghz of reduced height WR 10 waveguide coupled to full height WR10 w...

We experimentally study the widths of resonances in a two-dimensional microwave cavity at room temperature. By developing a model for the coupling antennas, we are able to discriminate their contribution from those of Ohmic losses to the broadening of resonances. Concerning Ohmic losses, we experimentally put to evidence two mechanisms: damping along propagation and absorption at the contour, t...

Confocal laser endomicroscopy is a recently introduced advanced imaging technique which enables microscopic imaging of the mucosa in-vivo. This technique has already been applied successfully during diagnosis of gastrointestinal diseases. Whereas for this purpose several computer aided diagnosis approaches exist, we present a classification system that is able to differentiate between healthy a...

The analysis and design of a cylindrical cavity for microwave heating applications, including the feeding mechanism is proposed in this paper. The cylindrical cavity design aims at the production of a uniform field distribution, avoiding non-uniform heating and thermal runaway. The analysis of the device is based on the Mode Matching Technique. This has been proved to be an efficient and robust...

We present a numerical study of electromagnetic reflection and cavity modes of 1D-sub-wavelength rectangular metallic gratings exposed to TM-polarized light. Computations are made using the modal development. In particular we study the influence of the choice of boundary conditions on the metallic surfaces on the determination of modes, on specular reflectance and cavity mode amplitudes. Our fu...

Nonlinear free convection in an inclined rectangular porous cavity heated from below has been studied using a two-dimensional spectral decomposition. The code uses pseudo-arclength continuation to follow solution curves around fold bifurcations. evolution with inclination of the pattern is complicated and it relies strongly on both Darcy–Rayleigh number aspect ratio cavity. When large generally...