A prototype of the S-band (2-4 GHz) feed horn for the EVLA was measured at the Outdoor Antenna Test Range (OATR) in Socorro in June 2007. In May 2006, a halfscale (C-band) version of this feed was measured at the same test range and was found to meet the design specifications. The S-band feed has an inside aperture diameter of 41.945” and a length of 129.75”. The average illumination taper at t...

In this paper, we propose a streamlined design and automation of horn antenna its rectangular waveguidebased feeder using computer simulation-based optimizations additive manufacturing. The approach enables time-effectiveness with holistic the two components, while achieving advantageous results parameters. is described in comparison to other works presented discussed on models manufactured for...

The paper explores an omnidirectional antenna configuration composed of a reflector fed by shaped dielectric lens associated with coaxial TEM horn. A simple formula describes the shape obtained applying Fermat’s principle to control rays’ caustic emerging from interface. Based on geometrical optics (GO) principles, synthesis technique defines radiation pattern in vertical plane. Concatenated co...

This paper describes the development of a fully automated measurement software for antenna radiation pattern measurements in a Compact Antenna Test Range (CATR). The CATR has a frequency range from 2-40 GHz and the measurement hardware includes a Network Analyzer for transmitting and Receiving the microwave signal and a Positioner the motion of the Styrofoam column. The measurement process incl...

This paper introduces a novel structure of 4×4 multiple beam forming antenna system using substrate integrated folded waveguide technology. For high speed wireless communication it is necessary to minimize the interferences and multipath fading. Multiple beam forming antenna system is a good solution to these problems. The substrate integrated folded waveguide (SIFW) technology reduces the widt...

A tunable impedance matching network is applied to achieve very widely tunable antennas, whose geometries are independent and unchanged to simplify the design. The attached matching network as the antenna feeding network enables any unspecified UWB antenna to tune the operation frequency continuously with high selectivity by merely one single control. This is quite different from filter-based c...

We continue here our investigation of Solid Dielectric Lens Impulse Radiating Antennas (SDL IRAs), which are intended for Ultra-Wideband, high-voltage radiation from the front end of an electrically conducting cylindrical shroud. This device is intended to radiate the highest possible field from the smallest possible aperture using the highest possible source voltage. Furthermore, this antenna ...

The Technical University of Denmark (TUD) Synthetic Aperture Radiometer (SARad) is a two-channel demonstration model that can simulate a two-dimensional (2-D) thinned array radiometer having an unfilled aperture populated with several small antenna elements. Aperture synthesis obtained by interferometric measurements using the antenna elements in pairs, followed by an image reconstruction based...