Abstract
A wireless communication scheme named point focusing (PF) wireless communication is proposed for intra-spacecraft wireless transmission. In this scheme, a set of point focusing fields (PFFs) generated by the time reversal (TR) based field shaping method are employed to carry the binary bits. Based on the orthogonality of the non-overlapped focal points of the PFFs, the same spectrum can be spatially reused. The point-to-point spacing between PFFs is half a wavelength, that is, a distance at Rayleigh diffraction limit, which can maximize the spectrum reutilization efficiency in a bounded spatial region. A closed metal cavity is employed to numerically and experimentally demonstrate the performance of the PFFs based wireless communications.
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