A reconfigurable polarization converter and related application as horn antenna cladding

Zhu, Shuang Shuang; Wang, Ping; Zhang, Yong; Yan, Zhongming; Wang, Yu; Zhou, Heling

doi:10.1063/5.0130212

Cited by 7 publications

(1 citation statement)

References 34 publications

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“…Depending on whether controllable components, such as PIN diodes, varactor diodes, and MEMS switches or tunable materials such as graphene and vanadium dioxide [6,7] are loaded on the metasurface [8]. Metasurfaces can be divided into non-reconfigurable metasurfaces [9][10][11][12][13][14][15] and reconfigurable metasurfaces [16][17][18][19][20]. The functions implemented by non-reconfigurable metasurfaces are usually constant, while reconfigurable metasurfaces can generally achieve two or more functions.…”

Section: Introductionmentioning

confidence: 99%

Inverse design of two-function transmission-type reconfigurable polarization control metasurfaces based on deep learning

Hu,

Ma,

Zhou

et al. 2024

J. Phys. D: Appl. Phys.

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Compared with single-function metasurfaces, the design difficulty of multi-function metasurfaces increases significantly. This paper introduces an inverse design method based on deep learning to address this challenge. By this method, a transmission-type reconfigurable polarization control metasurface (TRPCM) with two functions is rapidly designed. The network model used in the method consists of an electromagnetic parameter reconstruction network model (EMPRNM) and an inverse prediction network model (IPNM). The combination of the two models can solve the problem of difficulty in defining high-dimensional inputs in traditional inverse design, and achieve accurate prediction of metasurface structure parameters under given design targets. To optimize the hyperparameters of the neural network model, a genetic algorithm (GA) was introduced. To solve the non-uniqueness problem of inverse design, a method for eliminating similar data by calculating Euclidean Distance (ED) was introduced. Both schemes further improve the predictive performance of the proposed network model. Finally, six design targets were set based on the TRPCM. The structural parameters of the metasurface were successfully predicted using two neural network models and achieved the required performance. On this basis, a set of parameters was selected for experimental validation. By controlling the ON or OFF of the PIN diodes, the fabricated metasurface achieves two functions: linear-to-circular polarization conversion (LTCPC) and linear polarization maintenance (LPM) in the range of 2-3.6 GHz. Study results show that the inverse design scheme proposed in the paper is feasible and practical for solving the rapid optimization design of complex multi-function metasurfaces.

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Section: Introductionmentioning

confidence: 99%

Inverse design of two-function transmission-type reconfigurable polarization control metasurfaces based on deep learning

Hu,

Ma,

Zhou

et al. 2024

J. Phys. D: Appl. Phys.

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Wide-angle, dual-polarized frequency selective rasorber based on the electric field coupled resonator using characteristic mode analysis

Malekara

Khalilzadegan

Ghobadi

et al. 2023

Journal of Applied Physics

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A wide-angle, dual-polarized frequency selective rasorber (FSR) with two absorption bands located at both sides of a passband is proposed. The structure comprises a lossy frequency selective surface (FSS), a bandpass FSS, and an air spacer located in between. A modified electric field coupled (ELC) resonator is used as a parallel resonance at the lossy layer to achieve a passband within the absorption band. The characteristic mode theory is utilized to investigate the absorption behavior of the lossy layer. Extensive simulations were carried out to assess the performance of the presented structure. Under the normal incidence, the proposed structure provides an operating bandwidth (|S11| < −10 dB) from 1.94 to 7.16 GHz, corresponding to a fractional bandwidth (FBW) of 114.7%. The achieved passband is around 4.3 GHz with a minimum insertion loss of 0.81 dB. The absorption bands with an absorption rate higher than 80% are 1.81–3.69 GHz (FBW of 68.4%) in the lower band and 4.95–7.43 GHz (FBW of 40%) in the upper band, respectively. It exhibits quite stable characteristics up to 50° angle of incidence. Furthermore, a prototype was fabricated and measured, which confirms that a good agreement exists between the experimental and simulation results. The proposed FSR is a suitable candidate for lowering the radar cross section (RCS) of the communication equipment or making them stealthy.

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A reconfigurable multifunctional polarization converter based on active metasurface

Zhao,

Ding,

Zhou

et al. 2023

Journal of Applied Physics

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In this paper, we report a reconfigurable multifunctional polarization converter (RMPC) based on positive-intrinsic-negative (PIN) diodes, enabling to achieve different functions in different bands and states. The simulations and experiments show that when the PIN diode is off, it acts as a broadband linear polarization (LP) converter at 9.12–15.93 GHz. Simultaneously, when the PIN diode is on, the LP incident wave is converted into a left-handed circular polarization wave at 8.69–11.41 GHz and a cross-polarization wave at 13.40–14.97 GHz, whereas full reflection is obtained at 12.05–12.54 GHz. The RMPC consists of two dielectric plates and three layers of metal copper plates. Finally, a sample was fabricated and measured, the simulated and experimental results were in good agreement. Compared with other works, the RMPC has more working states and wider operating frequency bands, which has an application potential in the field of radar stealth and satellite communication.

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A reconfigurable polarization converter and related application as horn antenna cladding

Cited by 7 publications

References 34 publications

Inverse design of two-function transmission-type reconfigurable polarization control metasurfaces based on deep learning

Inverse design of two-function transmission-type reconfigurable polarization control metasurfaces based on deep learning

Wide-angle, dual-polarized frequency selective rasorber based on the electric field coupled resonator using characteristic mode analysis

A reconfigurable multifunctional polarization converter based on active metasurface

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