Quad-ridged conical horn antenna for wideband applications

Abstract

This article presents a quad-ridged conical horn antenna with high gain and low side lobe level for broadband applications. To the best of authors' knowledge, the proposed structure presented in this article is completely new. The designed antenna introduces a low VSWR, which is lower than 2.2 for the frequency range of 8-18 GHz, and simultaneously achieves high gain as well as dual-polarizations with high isolation between the corresponding excitations. The common impedance exponential tapering is used at the flare section of the horn, and a coax to waveguide transition, namely quadruple-ridged circular waveguide, with a conical cavity is used to improve the VSWR. The proposed antenna structure is designed and simulated by two well established packages, namely the CST microwave studio and the Ansoft HFSS, showing there is a close agreement between the results obtained by the aforementioned softwares.

A metamaterial with applications in broad band antennas used in radio astronomy and satellite communications

“…In addition, The meta-horn presented here was optimized for single-mode operation, since a monomode broad band feed-guide can be incorporated [17,18]; however, the idea of living with higher order modes and shaping them according to specific purposes is also very attractive for future applications. Given this, a more control over the TM 11 mode would give an improvement of the meta-horn cross-polarization up to levels under −40 dB or less in the multimode regime through a 2:1 bandwidth factor, as shown in figures 9 and 10, while mitigating the side-lobes.…”

A metamaterial with applications in broad band antennas used in radio astronomy and satellite communications

“…8 This fact could help in a future (re-)design stage. On the other hand, although the meta-horn presented here was optimized for single-mode operation since a monomode broad band feed-guide can be incorporated ( [14], [15]), the idea of living with higher order modes and shaping them accord-ing to specific purposes is also very attractive for future applications. Given this, to have more control over the TM 11 mode is a goal for improving the cross-polarization of the meta-horn up to levels under −40 dB or less in the multimode regime through a 2:1 bandwidth factor, as is discussed in Figs.…”

Design and optimization of a small ultra-wideband planar monopole antenna

“…In addition, the antenna is becoming smaller and smaller along with the miniaturization of electric instrument and communication system, which makes the small UWB antenna a hot topic now. After many years of research, there are a lot of antennas with wideband characteristic, such as fractal antenna [5][6][7], horn antenna [8] and bowtie antenna [9], but some are still not with a bandwidth wide enough, some are not planar not just too big, these drawbacks make them not suitable for integrated circuit.…”