Design and Analysis of a Novel Compact Metamaterial Absorber Based on Double-Layer ITO Resistive Film for Improving Signal Integrity

Abstract

This paper presents a compact metamaterial absorber (MMA) based on double-layer ITO resistive film for suppression of electromagnetic interference (EMI) to improve signal quality and signal integrity (SI). In the design of MMA, based on the classic Jerusalem cross, circular and fan-shaped structures are combined to increase its equivalent capacitance to achieve frequency shift, and an equivalent circuit model is established to analyze the key factors affecting its absorption rate. At the same time, the fullwave simulation results show that more than 90% absorption rate is achieved in the frequency range of 8.9 GHz-14.0 GHz, and the measurement results show that the absorption rate of MMA at different incident angles is consistent with the simulation. Moreover, microstrip antenna and differential microstrip transmission line are also designed as equivalent radiation sources. The co-simulation results show that the 3 m field radiation of the patch antenna is reduced by 10 dBµV at 10 GHz. At the same time, the eye height of the differential microstrip transmission line has increased from 68 mV to 340 mV, indicating that the signal integrity problem has been significantly improved. The size of the unit is only about 0.065 λ L ×0.065 λ L where λ L is the wavelength of the lowest frequency, and the total thickness of the absorber is only 0.047 λ L . The proposed MMA has the characteristics of miniaturization, ultra-wideband, high absorption rate, and polarization insensitivity, which provides a new suppression method for the radiation problem of gradually miniaturized electronic equipment.

Design of an ultra-wideband and switchable VO2-based microwave absorber

“…It was recently reported that there was good agreement between the Computer Simulation Technology (CST) simulation and experimental results of metamaterial absorber designs [2,9,16,19]. Therefore, the CST simulation method through a frequency-domain solver is also used in this work to design and optimize the proposed UWBMA.…”

“…These approaches have disadvantages like fabrication process complexity and absorption bandwidth limitation. Recently, broadband MAs based on low-Q-factor materials such as a conductive polymer [17], indium tin oxide [18,19], and resistive ink [20][21][22][23] have successfully developed. However, the obtained broadband absorption characteristics of these MAs are relatively narrow and these absorption phenomenon is not switchable.…”

A transparent broadband flexible metamaterial absorber for radar infrared-compatible stealth

“…With the development of detection methods, the application scope and role of stealth technology in modern information warfare become more and more important, and stealth technology develops rapidly [1][2][3]. A variety of stealth methods have been developed from single-band [4] and ultra-thin [5][6][7] to multi-band [8] and broadband [9][10][11]; from terahertz [12][13][14] to visible [15][16][17] and infrared bands [18][19][20]; and from flexible [21][22][23] and optically transparent [24][25][26] to waterbased stealth [27][28][29]. However, when the traditional stealth principles are faced with the design of radar-infrared stealth compatibility, how to reduce the infrared emissivity while * Author to whom any correspondence should be addressed.…”

A transparent water-based metamaterial broadband absorber with a tunable absorption band

“…To eliminate adverse electromagnetic radiation, metamaterial absorbers(MMAs) are used in a wide range of applications from military to civilian [6,7]. Singleband [8], multi-band [9], and broadband [10] MMAs have been realized. However, most MMAs are composed of optically opaque metallic patterned and dielectric layers [11], which limits their potential application in certain specific situations, such as cockpit windows and complex optical instruments where visibility is required.…”