Zhongming Yan

Area of research

Aerospace Engineering · Electronic, Optical and Magnetic Materials

Research interest

Research topics from publications: Analysis of near field mutual coupling in wideband magnetoelectric antennas array; Multifunctional polarization converter based on multilayer reconfigurable metasurface; A low-profile metamaterial absorber with ultrawideband reflectionless and wide-angular stability; Topology-optimized thermal metamaterials based on inhomogeneous and anisotropic unit array. Representative work: The operating bandwidth of miniaturized magnetoelectric (ME) antenna is generally narrow due to the acoustic wave driven magneto-electromechanical resonance effect, parallel connection of multiple ME antennas with different resonant frequencies is an effective way to broaden the operating bandwidth of the antenna. This paper presents an ME antenna array consisting of three units, which are constructed of a sandwich stack of Metglas/Pb(Mg1/3Nb2/3)O3–PbTiO3/Metglas. The −3 dB operating bandwidth of 152.4–172.8 kHz is achieved, and the relative bandwidth is 12.5%. Experimental results indicated that the bias magnetic field and coupling effect between the ME antenna units significantly influence In the modern wireless communication system, the manipulation for polarization of electromagnetic wave plays a important role in improving the capacity and reliability of communication. In this paper, a multifunctional polarization converter (MFPC) based on the multilayer reconfigurable metasurface is proposed, which can assist the source antenna to transmit and receive multiple polarization signals. The MFPC consists of a grating which can filter out the undesired polarization and four layers of metasurfaces incorporated with PIN diodes. The functions of the MFPC include LTC and LTL polarization conversions, co-polarization transmission and reflection for arbitrary polarization. By changing