Research on the space-tenna configuration in consideration of SPS systems

A wireless power transmission subsystem in a space solar power system (SSPS) satellite needs all ultra-large antenna or a space-tenna, the diameter of which may be several tens of m to even 1 km depending on the system parameters. Being one of the most important and difficult devices to build, the space-tenna gives us several attractive research topics which have not been paid attention to in the cases of the other kinds of antennas. Possible candidates of such antennas are: (i) an array of element apertures, (ii) an array of quite a large number of small resonant elements. This paper describes an investigation of die configuration and radiation characteristics of a space-tenna.