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He Bai - IEEE Xplore Author Profile

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Mechanical antennas that are driven by external mechanical oscillation and acoustic self-resonance have been demonstrated for portable very low-frequency (VLF) electromagnetic (EM) wave transmitting. However, the mechanical relaxation, caused by the energy transition between mechanical and EM energies during signal modulation, limits the modulation rate of mechanical antennas. Here, we use direct ...Show More
Retro-directive microwave power transmission helps to guarantee the beam collection efficiency for dynamic application systems. To regulate the power steering error, it was decomposed into several factors and items. Then compromise was done among them. The direction of arrival estimation and beam steering experiment was conducted and the measured results were analyzed.Show More
As a well-known and wide-range electromagnetic compatibility problem, passive intermodulation (PIM) caused by nonlinearities remains a considerable potential risk for high-power transceiver communication systems. A three-dimensional field-circuit mixed simulation method for the prediction of PIM in electrically large-size deployable reflector antennas is presented in this work. Based on the accura...Show More
This paper presents a microwave power transmission demonstration system comprehensively simulating the operating mode and validating the functions and efficiency of microwave power transmission technologies for SSPS (Space Solar Power Station). The transmitting antenna array is a planar microstrip antenna array with quasi-Gaussian distribution. The beam collecting efficiency of this system is abou...Show More
A novel model is presented for the simulation of passive intermodulation (PIM) generated on the mesh reflector. The model considers the contacts between wires as the main PIM sources. The electro-thermal coupling could be the main nonlinear mechanism responsible for PIM for contacts between the wires coated by gold. The third order intermodulation level responses of 0.25*0.25 square mesh sample wi...Show More