A5022083931- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Photonic Crystals and Applications
- Electromagnetic Compatibility and Measurements
- Photonic and Optical Devices
- Millimeter-Wave Propagation and Modeling
- Electromagnetic Compatibility and Noise Suppression
- Energy Harvesting in Wireless Networks
- Neural Networks and Reservoir Computing
Zhejiang University
2020-2023
In this article, a novel miniaturized concept named strong-coupled frequency selective surface (SC-FSS) with excellent angular stability is presented. First, conceptual design of SC-FSS introduced, where the resonant frequencies are insensitive to almost all incident angles. A corresponding equivalent circuit model developed interpret operating principle and formulate relevant equations an error 0.2%. Furthermore, ultraminiaturized ultrathin band-stop structure unit cell size λ0/35 thickness...
An ultrawideband dual-polarized frequency-selective absorber (FSA) with a tunable reflective notch is proposed in this communication. The structure constructed by combining broadband FSA as well lossless surface (FSS). consists of lossy layer and an air spacer, which backed metal plane. Varactors are employed the FSS dc bias applied to adjust frequency notch. equivalent circuit model (ECM) notch-tunable established explain operating principle, impedance condition ultrawide absorptive band...
This article proposes a broadband inverse analysis method for the higher order modes inside resistively loaded monocone transverse electromagnetic (TEM) cell. The analytic solutions of field pattern each mode are derived in frequency domain. deep learning technique is employed to effectively predict coefficients these over wide range (1.885–300 MHz) only given <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...
This article presents a novel miniaturized almost all-angle-insensitive strong coupled frequency-selective surface (SC-FSS) with all-polarization-insensitive multiband by introducing the different interlayer coupling patches. Two templates of single passband and dual unit cell less than <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.03\lambda $ </tex-math></inline-formula> are adopted to bring in two...
We present a single-layer, transmissive metalens for focusing the orthogonal polarization components of incident light to two independent focal spots without affecting initial states. To produce required phase profile, cross-shaped nanorod, as unit cell metalens, is developed support arbitrary combinations shifts (0- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2\pi$ </tex-math></inline-formula> )...
This article proposes a method to obtain the analytic solution of electromagnetic field inside practical finite monocone transverse (TEM) cell. The higher-order modes existing in TEM cell are solved and analyzed for first time, which explains distortion corresponding ideal standard field. proportionality factors these determined by comparison with simulation results. calculation results (i.e., sum modes) consistent experimentally validated. work can be used design eliminating expanding time...
For the metasurface design, a novel unit cell of arbitrary hexagon patterns and neural network that can generate these are proposed to get target transmission amplitudes phases at will. The encoded few design variables but retain high freedom fabrication feasibility. Long short-term memory is applied provide meaningful parameters. A terahertz transmissive lens consists generated simulated further verify concept. This work provides new solution inverse opportunities for future...
A double-check tandem network is presented for the inverse design of electromagnetic devices in an instantaneous manner. Based on reported model, we use two or more pre-trained forward models to train model sequentially. Such method employed photonic band structures. The results show that eliminates dependence bounded activation functions and overcomes vanishing gradient problem.