Design of a Switchable Microwave Absorber

Zhang, Qi; Shen, Zhongxiang; Wang, Jianpeng; Lee, Kian Seng

doi:10.1109/lawp.2012.2220115

Cited by 44 publications

(16 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From comparison in Table 9, it can be deduced that tunable AFSSs loaded with varactor diodes provide a reasonable tuning range and FBW [164,172,175,176]; although in some cases the FBW is not necessarily found with a satisfactory percentage. Likewise, switchable AFSS loaded with PIN diode also perform convincingly with good FBW [156,157]. However, polarization insensitivity is an issue with some applications, which, in most cases, is not achievable due to unsymmetrical design.…”

Section: Microwave Absorbing Fsssmentioning

confidence: 93%

“…A switchable AFSS based absorber/reflector has recently been reported in [156], where it works as an absorber in absorptive condition, while it acts as a reflector in opposite state. EM structural design of buildings is an important application in which propagation of EM wave is controlled by means of switchable AFSS absorber [157]. Similarly, different designs of tunable FSSs are presented so far.…”

Section: Microwave Absorbing Fsssmentioning

confidence: 99%

See 1 more Smart Citation

Frequency Selective Surfaces: A Review

2018

View full text Add to dashboard Cite

The intent of this paper is to provide an overview of basic concepts, types, techniques, and experimental studies of the current state-of-the-art Frequency Selective Surfaces (FSSs). FSS is a periodic surface with identical two-dimensional arrays of elements arranged on a dielectric substrate. An incoming plane wave will either be transmitted (passband) or reflected back (stopband), completely or partially, depending on the nature of array element. This occurs when the frequency of electromagnetic (EM) wave matches with the resonant frequency of the FSS elements. Therefore, an FSS is capable of passing or blocking the EM waves of certain range of frequencies in the free space; consequently, identified as spatial filters. Nowadays, FSSs have been studied comprehensively and huge growth is perceived in the field of its designing and implementation for different practical applications at frequency ranges of microwave to optical. In this review article, we illustrate the recent researches on different categories of FSSs based on structure design, array element used, and applications. We also focus on theoretical breakthroughs with fabrication techniques, experimental verifications of design examples as well as prospects and challenges, especially in the microwave regime. We emphasize their significant performance parameters, particularly focusing on how advancement in this field could facilitate innovation in advanced electromagnetics.

show abstract

Section: Microwave Absorbing Fsssmentioning

confidence: 93%

Section: Microwave Absorbing Fsssmentioning

confidence: 99%

Frequency Selective Surfaces: A Review

2018

View full text Add to dashboard Cite

show abstract

“…[10][11][12][13] In recent years, more attention has been focused on the switchable absorber/reflector. [14][15][16][17][18][19][20][21][22][23][24][25][26] In order to avoid radar detection in complex electromagnetic environment, it is necessary to use absorbing materials. However, since the absorber only absorbs all the incident electromagnetic waves, it will cause the problem of blocking the useful signals at the same time.…”

Section: Introductionmentioning

confidence: 99%

A wideband switchable absorber/reflector based on active frequency selective surface

Chen

Cao

Wang

2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

A wide-band absorber and reflector using PIN diodes based on active frequency selective surface (AFSS) is presented, which the AFSS is performed as a wide-band absorber and reflector with OFF and ON state diodes. By changing the states of the PIN diodes, the measured reflectivity of the structure can dynamically switch from reflection to less than −10 dB absorptivity ranging from 7.5 to 18 GHz under normal incidence. The unique characteristic of the proposed structure lies in its capability to switch between two working states. In addition, the bandwidth of the designed structure covers a wider band compared with earlier switchable absorber/reflector structures. The fabricated structure shows good agreement with the simulated results.

show abstract

“…compability [10]. Compared with the passive FSS, an active FSS (AFSS) is able to vary its electromagnetic characteristic by loading active elements such as PIN diodes [11] and varactor diodes [12], [13], offering extra flexibility and reconfiguration properties. In particular, switchable perfect absorber/reflector is one of the most important applications of AFSSs and can be electrically switched by changing the states of the PIN diode.…”

Section: Introductionmentioning

confidence: 99%

Circuit Model Analysis of Switchable Perfect Absorption/Reflection in an Active Frequency Selective Surface

et al. 2019

View full text Add to dashboard Cite

This paper presents a switchable perfect absorber/reflector in S band using a PIN diode integrated active frequency selective surface (AFSS). It is numerically demonstrated that the AFSS shows over 99% absorptivity at 3.5 GHz when the diode is forward biased, whiles reflects over 99% incident power when the diode is inversed biased. An equivalent circuit (EC) model is further developed to characterize the AFSS's switchable electromagnetic performance and aim at model optimization. The empirical formulas and curve fitting technology have been employed to get the lumped element parameters in the EC model. Special considerations are given to physical attributes, including the dielectric permittivity and thickness of the substrate. The consistency of the electromagnetic simulations and EC analysis demonstrates the high accuracy of the developed EC model.

show abstract

Design of a Switchable Microwave Absorber

Cited by 44 publications

References 13 publications

Frequency Selective Surfaces: A Review

Frequency Selective Surfaces: A Review

A wideband switchable absorber/reflector based on active frequency selective surface

Circuit Model Analysis of Switchable Perfect Absorption/Reflection in an Active Frequency Selective Surface

Contact Info

Product

Resources

About