The MU radar with an active phased array system, 2. In-house equipment

The MU (middle and upper atmosphere) radar of Japan uses an active phased array system. Each of 475 crossed three-subelement yagi antennas in a circular array is provided with a 2.4-kW peak power amplifier. This system configuration attains a very fast and almost continuous beam steerability at the total peak radiation power of 1 MW. A brief description of the in-house equipment is presented herein.