Design of a broadband reflectarray antenna for x-band radar application

Rumli, Nurul Amalina (2023) Design of a broadband reflectarray antenna for x-band radar application. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A unit cell antenna for the X-band is a type of antenna designed to function within the Xband frequency range, which is commonly classified as 8-12 GHz. These antennas are commonly employed in radar and communications systems, as well as other applications requiring high-frequency signal transmission and reception. Next, the patch antenna, which is made up of a flat, metallic patch suspended above a ground plane, is a typical type of Xband unit cell antenna. A microstrip transmission line often feeds the patch, allowing the antenna to be integrated into a larger system or device. Patch antennas are distinguished by their tiny size, low profile, and good performance at X-band frequencies. The slot antenna is another type of X-band unit cell antenna that is made out of a rectangular slot cut into a metallic sheet or waveguide. Besides that, the slot antenna which is often fed by a coaxial transmission line, is notable for its large bandwidth and strong gain at X-band frequencies. A unit cell antenna's performance in the X-band can be measured using a range of metrics, including gain, directivity, and efficiency. These parameters can be shown on a graph to demonstrate how the antenna operates throughout a range of frequencies or under various operating situations. However, one of the limitations of the reflectarray antenna is its narrow bandwidth that limits its use in many applications. This work provides the design characterization and analysis of reflectarray antennas for bandwidth enhancement and its use in the X-band radar applications.

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