A novel three-dimensional elliptical-shaped Fresnel lens (ESFL) analytical model is presented to evaluate and maximize the solar energy concentration of Fresnel-lens-based concentrators. AutoCAD, Zemax Ansys software were used for ESFL design, performance evaluation temperature calculation, respectively. Contrary previous modeling processes, based on edge-ray principle with an acceptance half-a...

An axially corrugated horn antenna with an elliptically shaped taper is proposed for satellite communication applications. This structure is a good candidate for the feed of reflectors and also for improving the electrical properties of reflector antennas. A tapering method is used to justify the horizontal location of the corrugation profile which improves the electrical performance of the pre...

Previous research of the authors pointed out that side-resonators can be applied to reduce fan noise. However, the noise reduction capabilities of most resonator geometries, e.g. tube resonators, cylindrical resonators (cylindrical air layers) and circular resonators (disc shaped air layers), are relatively narrow banded. This is disadvantageous in case resonators are used in combination with a...

BACKGROUND Women with elliptical faces are considered to be aesthetically appealing in Asia. Some men prefer this shape for themselves and choose to have their square-shaped face altered to an elliptical shape. To accomplish this, we perform an ostectomy that includes resection of the mandibular angle, splitting of the lateral cortex, and reduction in the width of the chin. METHODS Nineteen m...

A transmitarray antenna with an elliptical cylindrical shape is presented for a wide-angle multibeam radiation in this communication. The has radiating aperture cross-section, namely, shape. Multiple feeds can be placed on the middle horizontal plane to realize multiple beams. Inspired by 2-D Ruze lens, and phase compensation are jointly designed according desired maximal beam direction. Innova...

A number of attempts have been made to study heat flow in circular cross-section of human limbs. But almost no attempt has been reported in literature about study of heat flow in the tissue layers of elliptical shaped human limbs. Therefore, a seminumerical model has been developed to study heat flow in peripheral layers of three-dimensional elliptical shaped human limbs for a steady state case...

We compare several local absorbing boundary conditions for solving the Helmholtz equation, by a finite difference or finite element method, exterior to a general scatterer. These boundary conditions are imposed on an artificial elliptical or prolate spheroid outer surface. In order to compare the computational solution with an analytical solution, we consider, as an example, scattering about an...

This article presents a novel polarization-insensitive chipless radio frequency identification tag having an encoding capacity of 11 bits. The proposed resonator design comprises discontinuous arc slots forming truncated elliptically shape offering 1:1 slot to bit correspondence with suppressed unwanted harmonic resonances. Electromagnetic performance analysis the is done over ungrounded Rogers...

This paper discusses an elliptical ultrawideband (UWB) antenna and a dual-band UWB notch antenna. To achieve bandwidth, two corner cuts are etched into the rectangular slot on partial ground plane. An inverted-U-shaped conductor-shaped resonator utilized to characteristics The suggested has overall dimension of 24×32 mm2. gain 4.9 dB, bandwidth 2.5–11 GHz, linear phase response, group delay les...