Penta band single negative meta-atom absorber designed on square enclosed star-shaped modified split ring resonator for S-, C-, X- and Ku- bands microwave applications

Abstract

This paper represents a penta band square enclosed star-shaped modified split ring resonator (SRR) based single negative meta-atom absorber (MAA) for multi-band microwave regime applications. FR-4 low-cost material has been used as a substrate to make the MAA unit cell with 0.101λ0 × 0.101λ0 of electrical size, where λ0 is the wavelength calculated at the lower resonance frequency of 3.80 GHz. There are two outer square split ring and one inner star ring shape resonator of 0.035 mm thickness of copper placed on the one side, and another side of the substrate has full copper to construct the desired unit cell. The MAA unit cell provides five absorption peaks of 97.87%, 93.65%, 92.66%, 99.95%, and 99.86% at the frequencies of 3.80, 5.65, 8.45, 10.82, and 15.92 GHz, respectively, which covers S-, C-, X-, and Ku- bands. The properties of MAA have been investigated and analyzed in the E-, H-fields and surface current. The EMR and highest Q factor of the designed MAA is 9.87 and 30.41, respectively, and it shows a single negative (SNG) property. Different types of parametric analysis have been done to show the better performance of absorption. Advanced Designed System (ADS) software has been used for equivalent circuit to verify the simulated S11 result obtained from the CST-2019 software. Experimental outcomes of the MAA unit cell have a good deal with the simulated result and measured result of the 24 × 20 array of unit cells also shown. Since the unit cell provides superior EMR, excellent Q-factor, and highest absorption so the recommended MAA can be effectively used as a penta band absorber in microwave applications, like notch filtering, sensing, reducing the unintended noise generated with the copper component of the satellite and radar antennas.

Ultra-Thin Nona-Band Polarization Insensitive Metasurface for High-Quality Sensing, EMI-Shielding, and Antenna RCS Reduction

“…6(a)-(i) to Fig. 7(a)-(i) which satisfied the Maxwell's equation (16). At 5.78GHz frequency surface current distributed maximum at upper and lower side of structure on that portion magnetic field is maximum depicted in Fig.…”

“…Electric field distribution at nona-bands are depicted in Fig. 5(a)-(i), expresses by time varying magnetic field which produces the electric fields by using Maxwell's equation (16). From Fig.…”

“…absorption rate 96.29%) are proposed for X and K-band [15]. A penta-band modified split-ring resonator absorber with single negative metaatom is developed [16] for microwave range of applications. An M advance symmetric MMA, based on segmented split-ring is also designed [17].…”

Metasurface based MIMO Microstrip Antenna with Reduced Mutual Coupling

“…The formed LC circuit is responsible for producing the resonant frequency of the metasurface. This is the frequency where wave propagation will be rejected, it can be expressed by equation (5.2) below [114]. The induced magnetic field in the SRR is responsible for creating negative permeability.…”

Multiband Metasurface‐Based Absorber for Applications in X, Ku, and K Bands

“…regime (Islam et al, 2021). However, the disadvantage of this method is that it is difficult to fit different sizes of arrays in the same plane.…”