A novel very compact ultra-wide band double ridge horn antenna

Abstract – In this article, a new wideband double-ridge horn antenna with very compact dimensions is presented. The structure of the proposed Antenna includes a double ridge, cavity back, and corrected sidewalls. In this paper, the dimension of the horn antenna has been compacted and the bandwidth improved by using FR۴ dielectric substrate sidewalls and deforming upper and down metal walls. For designing this entire horn antenna, three-dimensional electromagnetic field simulation software Ansoft HFSS based on the finite element method is applied. To experimentally verify the performance, a prototype of the antenna is fabricated and measurement is performed. The dimensions of the antenna are ۹۵ * ۸۵ * ۶۸ mm۳ . The bandwidth of this antenna is between ۱.۷ and ۲۰ GHz and the antenna gain is between ۵.۵ and ۱۵.۵ dBi. Also, the antenna radiation pattern is directional without deterioration in total bandwidth. The proposed antenna can be used in direction finder systems and noise jammers.

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Keywords" ، compact dimension" ، " ، double ridge" ، and " ، ultrawide band"