Papers by Author: Ming Huang

Abstract: This paper introduces a feasible patch antenna to generate OAM-carrying radio beams. Eight identical printed dipole antennas with microstrip balun feedline are arranged in an octahedron cylindrical substrate. Every printed dipole is fed with unit amplitude but with a successive phase difference from element to element. We can change the phase difference at the steps of 0, ±45o, ±90o, and ±135o to obtain mode numbers 0, ±1, ±2, and ±3. Simulation shows that the OAM states of ±1, ±2 and-3 achieve the expected results well, while the state of +3 produce a deviation due to the radiation difference of the designed antenna element and traditional tripole antenna. Furthermore, we achieve the impedance matching of every port and increase the directivity of the antenna. Thus, the proposed antenna is a promising candidate to generate OAM in engineering.

Abstract: Sensor utilizing metamaterials have opened up a new field of considerable interest. We extend here the works of our group about metamaterial sensor based on Whispering Gallery Mode (WGM), which is constructed with a microring resonator sensor coated with metamaterial layer. We demonstrate that our sensor possesses higher sensitivity than the traditional sensor since the amplification and penetration of evanescent wave by metamaterials.

Abstract: Microgrid is a distributed power generation system, and is also an effective solution for the connection of grids with high level of distributed energy resources. This paper reviews the microgrid test beds and demonstrated projections in many countries, with emphasis on the communication and control techniques. We arrive at the conclusion that new strategies for communication and control are urgently needed in future power grid.