Design of a low-RCS circularly polarized metasurface array using characteristic mode analysis

Abstract

In this paper, a novel design strategy for a circularly polarized metasurface antenna array that integrates low scattering and well-behaved radiation is proposed. Firstly, based on the Jerusalem cross-shaped patch, a metasurface element with 180° reflection phase difference under orthogonal normal incident waves is designed. The characteristic mode theory is utilized to analyze the metasurface element mode to excite the linear polarization radiation. Then, the metasurface antenna elements are arranged orthogonally in a 2×2 subarray and fed with a 90° phase difference, which achieves high port isolation, better circular polarization radiation and low scattering performance. Finally, the 4×4 array is fabricated and measured, and the good agreement between simulation and measurement verifies the effectiveness of the design method.

Metasurface-Based Circularly Polarized Slot Antenna for X-band Applications

“…The CP antenna in 35 provides low IBW and strong broadside gain despite having a large electrical dimension as compared to the proposed antenna. The antenna in 36 has a high gain but incredibly low IBW compared to the proposed antenna owing to its enormous electrical dimension. Compared with the specification (IBW, ARBW, gain, and electrical dimensions) in Table 1, the proposed slot antenna had a strong IBW and good ARBW with low-profile electrical dimensions.…”

“…It is crucial to improve ARBW and reduce the antenna size at the same time, therefore many studies are being performed to find the solution to these issues. A popular way of enhancing a slot's antenna bandwidth is by increasing the size of the bowtie slot or rectangular slot [33][34][35][36][37] . In all earlier studies, the author has used narrow-width slot antennas with polarization converters adopting slot antenna as an LP source.…”

Wideband single‐layer patch antenna with stable high gain using characteristic mode analysis

“…Patch antennas have been widely used in modern wireless communication for its excellent performance of low profile and easy integration [1]. However, the traditional microstrip patch antenna has only one resonant mode because of its inherent shortcomings, which has the characteristics of narrow band and low gain [2,3]. Therefore, a large amount of work has been conducted to improve the bandwidth and gain of the patch antenna.…”

A novel circularly polarized patch antenna based on polarization conversion metasurface for radiation and scattering performance improvement

“…The arrays are easier to obtain a wideband, high gain and low RCS, but requires a complex feeding network. [15][16][17][18][19][20][21] The single-feed antenna has the advantages of a single design process, and low profile, but yields the drawback of narrow band and low gain. To address the shortcomings of single-feed low-RCS CP patch antennas, several designs have been proposed.…”

“…The designs can be categorized into two types according to their feeding structure: single‐feed antenna and array. The arrays are easier to obtain a wideband, high gain and low RCS, but requires a complex feeding network 15–21 . The single‐feed antenna has the advantages of a single design process, and low profile, but yields the drawback of narrow band and low gain.…”