xing-chang wei

Published: Mar 28, 2017 by D. Yi, X. C. Wei, Y. L. Xu
Authors: IEEE Trans. Nanotechnol.
Subjects: Engineering - Electrical

A patterned graphene-based transparent microwave absorber is proposed. Graphene is transferred onto polyethylene terephthalate (PET) film, and patterned as μm-level periodic patches, so that a capacitive and resistive graphene surface is obtained at microwave band. The optical transmittance of the fabricated graphene/PET film reaches around 80% in the whole optical light range, while the absorption coefficient reaches 90% at 12.6 GHz. 100% absorption and 3 GHz bandwidth broadening are realized.

Published: Mar 24, 2017 by IEEE Trans. Microwave Theory Techn.
Authors: D. Yi, X. C. Wei, Y. L. Xu
Subjects: Engineering - Electrical

Two approaches to realize a tunable absorber based on patterned graphene metasurface are proposed in this paper. In the first approach, the center frequency of the absorber can be tuned by the surface resistance of the graphene in a wide range. The second approach, by implying the stack of graphene as the absorbing layer, can introduce a remarkable shift of the center frequency. A good correlation between simulation and measurement results is obtained.

Published: Mar 09, 2017 by IEEE Trans. Electromagn. Compat.
Authors: W. Y. Ding, X. C. Wei, D. Yi, and Y. F. Shu
Subjects: Engineering - Electrical

In this paper, we propose a closed-form solution for the impedance calculation of grid power distribution network (PDN). The grid PDN is equivalent to a plane PDN, whose impedance o can be calculated by the closed-form method. The results obtained by the proposed method show good agreements with that obtained by 3-D full-wave simulation and measurement.

Published: Dec 01, 2016 by IEEE Trans. Antennas Propagat.
Authors: L. L. Yang, X. C. Wei, D. Yi, and J. M. Jin
Subjects: Engineering - Electrical

A novel low cross-polarization bandpass frequency selective surface (FSS) with low passband ripples and a steep roll-off at both sides of the passband is proposed. The proposed FSS unit cell is composed of two specially designed cavities with mixed electrically and magnetically conducting boundaries. The characteristics, including a steep roll-off, low passband ripples, a low cross-polarization, and stability at oblique incidence angles, are verified by the measurement.

Published: Sep 22, 2016 by IEEE Trans. Electromagn. Compat.
Authors: J. B. Zhang, X. C. Wei, Y. F. Shu, X. Q. Yu, and Y. L. Xu
Subjects: Engineering - Electrical

To compensate the stopband offset, in this paper, a general method for expanding the bandwidth of a CMF is proposed. A wideband CMF with a central frequency around 25 GHz and an all-pass performance (from DC to 40 GHz) for differential signals is designed. Both the simulation and measurement results verify the effectiveness of the proposed improved CMF. The -10 dB stopband bandwidth of the coplanar CMF is increased by five times without SI problems.

Published: Dec 18, 2015 by IEEE Transactions on Components, Packaging and Manufacturing Technology
Authors: J. Li, X. C. Wei, and E. P. Li
Subjects: Engineering - Electrical

In this paper, an accurate wideband modeling approach based on a cylindrical mode expansion of electromagnetic filed around perfect magnetic conductors (PMCs) is proposed to analyze the electrical properties of high-density through glass via (TGV) arrays. The accuracy and the efficiency of the proposed field-circuit hybrid method are fully validated by comparing it with 2-D quasi-static, 3-D full-wave simulations, and published measurement results.

Published: Sep 04, 2015 by IEEE Trans. Electromagn. Compat.
Authors: F. P. Xiang, E. P. Li, X. C. Wei, and J. M. Jin
Subjects: Engineering - Electrical

In this paper, an approach is proposed to predict the maximum far-field radiated emission based on phaseless near-field scanning. The maximum radiated emission from printed circuit boards is assumed to be produced by dominant magnetic dipoles located by the near-field measurement. The particle swarm optimization technique is then employed to identify the complex moment components of the dipoles.

Published: May 18, 2015 by IEEE Trans. Electromagn. Compat.
Authors: Y. F. Shu, X. C. Wei, X. Q. Yu, Y. S. Li, and E. P. Li
Subjects: Engineering - Electrical

In this paper, a novel compact and wideband common-mode suppression structure is proposed, which is composed of a meander line and several quarter wavelength resonators. A reduction of 15 dB of common-mode propagation above 0.8 GHz is obtained by using the proposed hybrid structure. The measurement results of printed circuit boards, which are designed and fabricated on the simulation model, show good correlation with the simulation results.

Published: Apr 04, 2015 by J. Electromagn. Waves Appl
Authors: F. P. Xiang, X. C. Wei, and E. P. Li
Subjects: Engineering - Electrical

Electromagnetic emission characterization of printed circuit boards (PCBs) based on phaseless near-field measurement is increasingly concerned. Generally, the PCB is modelled by equivalent elemental dipoles. To accurately model the PCB, enough dipoles are required and consequently an inevitable trade-off occurs between the modelling accuracy and the model retrieval efficiency. To deal with this issue, an efficient hybrid method is here proposed.

Published: Apr 07, 2014 by IEEE Trans. Electromagn. Compat.
Authors: G. X. Luo, E. P. Li, X. C. Wei, X. Cui, and R. Hao
Subjects: Engineering - Electrical

The power distribution network (PDN) impedance of 3-D-through silicon vias (TSVs) interposer layer is modeled by considering the metal-oxide-semiconductor (MOS) structure effects. The PDN impedance characteristics of the 3-D-IC integrated system with multiple TSVs are performed by using the proposed multitransmission line and model reduction methods, and the importance of the capacitance is presented.