RCS reduction using a wideband dual logarithmic step patch PRRM in microstrip patch antenna

Abstract

Radar cross-section (RCS) reduction using a wideband dual logarithmic step patch polarization rotation reflective meta-surface (PRRM) in microstrip patch antenna is proposed. The investigation proposes the use of designed PRRM to construct a low profile microstrip patch antenna with multiband operation, circular polarization, monostatic RCS reduction in a wider bandwidth, and virtually constant gain over the entire RCS reduction bandwidth. A dual logarithmic step patch PRRM unit cell element with FR 4 superstrate is presented and it provides a relative bandwidth of 70.24% and polarization conversion ratio (PCR) greater than 90% from 6.65 to 13.85 GHz. The designed PRRM unit cells are arranged in 3 × 4 array on both sides of the designed microstrip patch antenna. This arrangement makes the antenna to operate circularly polarized at 10.33, 14.33, and 19.16 GHz with axial ratio values of 2.807, 1.963, and 1.471 dB, respectively. Also, it provides monostatic RCS reduction with 77.9% bandwidth ranging from 6.39 to 14.5 GHZ and virtually constant gain ranging from 8 to 19.7 GHz. The performance of the microstrip patch antenna with the designed PRRM are simulated and experimentally verified.

A low RCS microstrip antenna based on a composite technology of slotting and loading split‐rings

“…Characteristic mode analysis based on the shaping method was applied to the microstrip antenna to reduce its out‐of‐band RCS, while the reduction in the in‐band RCS was small 10 . Most methods to reduce the RCS of antennas using metamaterials involve increasing their original size or adding a superstrate above them, which is not suitable for miniaturization and conformal applications in environments where the space for installing the antenna is small 11–15 . Moreover, increasing antenna size brings about only a minor improvement in performance.…”

“…10 Most methods to reduce the RCS of antennas using metamaterials involve increasing their original size or adding a superstrate above them, which is not suitable for miniaturization and conformal applications in environments where the space for installing the antenna is small. [11][12][13][14][15] Moreover, increasing antenna size brings about only a minor improvement in performance.…”

Ultra‐wideband radar cross‐section reduction for ring‐shaped microstrip antenna based on characteristic mode analysis

“…In recent years, radar cross section reduction (RCSR) is a research hotspot. Many kinds of techniques have been proposed to reduce the RCS of antennas, such as radar absorber material (RAM), 1 frequency selective surface (FSS), 2‐4 shape modification, 5,6 metasurface, 7‐10 metamaterial, 11 artificial magnetic conductor (AMC) 12 and electromagnetic band gap structure (EBG) 13 . The RAM and FSS can realize out‐of‐band RCSR of antennas effectively.…”

Design of frequency selective surface using proximity mode coupling and its applications to Ku band RCS reduction

“…With an enormous development of stealth and detection technologies in the areas of defense sector, radar cross section (RCS) has been focused a lot. RCS is the measure of how an object can be detectable by the radar systems 1 and thus reduction of RCS has been made a meaningful research in stealth technology. There are several methods, which have been proposed for the RCSR of antenna.…”