Preliminary experimental results of beam steering control subsystem for microwave power transmission ground experiment

The Japan Aerospace Exploration Agency (JAXA) has been studying Space Solar Power Systems (SSPS) since 1998. To achieve 1GW-class SSPS, a power transmitting subsystem on a square kilometer scale is required for microwave power transmission (MPT). Consequently, it is crucial to construct a number of transmitting modules in the power transmitting subsystem, and transmit microwave beams pointing accurately to the power receiving subsystem. To achieve MPT technology, JAXA and the Institute for Unmanned Space Experiment Free Flyer are planning to conduct a MPT ground experiment in fiscal year 2014. In this joint effort, we are in charge of a beam steering control (BSC) subsystem, which is important among MPT technologies. We have defined the functions and specifications of the BSC Breadboard Models (BBMs). This paper describes the functions and specification of the BSC BBMs, and the results of system tests.