Single‐polarized wideband array antenna of all‐metal structure with modified TSA elements

Abstract

This article presents a wideband wide‐angle tapered slot array (TSA) antenna with no grating lobes in the 6–18 GHz band and the required scan range (azimuth angle ≤ |42.5°|, elevation angle ≤ |22.5°|). The unit element in the array antenna is a modified type of the existing TSA elements. We studied the various parameters for the proposed structure to investigate their effect. A single antenna and an 8 × 8 array antenna with the proposed structure were designed and fabricated. The validity of the proposed structure and design procedure has been verified by the agreement between the simulated and measured results.

Broadband all‐metal Vivaldi antenna with Rexolite inserted slot edge

“…The proposed antenna structure is constructed entirely of Aluminum 5083 material to meet the weight, power, and conductivity requirements. One of the advantages of the metal Vivaldi antenna is its suitability for high‐power applications 18,27 . The proposed antenna parts have been fabricated using a three‐axis cut from a block of aluminum, wire cutting, and high‐precision drilling equipment.…”

“…One of the advantages of the metal Vivaldi antenna is its suitability for high-power applications. 18,27 The proposed antenna parts have been fabricated using a three-axis cut from a block of aluminum, wire cutting, and high-precision drilling equipment. As shown in Figure 1A, the SMA connector passes directly through the backplate and is placed near the antenna impedance transformer cavity.…”

“…According to this study, the array structures have been achieved the bandwidth of 12:1 (700 MHz–9 GHz) for broadside radiation and an 8:1 operational bandwidth with a ±45° scanning angle. Kim et al 18 have proposed an antenna array which consists of 64 metal Vivaldi elements. The operational bandwidth of the antenna is 6–18 GHz with scanning angles of 42.58° for the azimuth and 22.58° for the elevation.…”

“…Vivaldi antennas, which are made of pure metal, are not only structurally rigid but also have a high‐power endurance 18 . Thus, Vivaldi antennas, which have a metallic structure, are also suitable for high‐power microwave (HPM) applications.…”

“…Vivaldi antennas, which are made of pure metal, are not only structurally rigid but also have a high-power endurance. 18 Thus, Vivaldi antennas, which have a metallic structure, are also suitable for high-power microwave (HPM) applications. Most of the broadband antennas that are available in the literature and markets do not offer good timedomain characteristics, directive radiation patterns, or broadband characteristics for the application areas of HPM.…”