The MU radar with an active phased array system: 1. Antenna and power amplifiers
Abstract
The MU (middle and upper atmosphere) radar of Japan is a 46.5-MHz pulse-modulated monostatic Doppler radar with an active phased array system. The nominal beam width is 3.6° and the peak radiation power is 1 MW with maximum average power of 50 kW. The system is composed of 475 crossed three-subelement yagi antennas and an equivalent number of solid state power amplifiers (transmitter-receiver modules). Each yagi antenna is driven by a transmitter-receiver module with peak output power of 2.4 kW. This system configuration enables very fast and almost continuous beam steering that has not been realized by other mesosphere-stratosphere-troposphere radars. Also, a variety of sophisticated operations are made feasible by dividing the antenna array into several independent subarrays. A brief description of the system, particularly its antenna and power amplifiers, is presented herein.
- Publication:
-
Radio Science
- Pub Date:
- December 1985
- DOI:
- 10.1029/RS020i006p01155
- Bibcode:
- 1985RaSc...20.1155F
- Keywords:
-
- Antenna Arrays;
- Doppler Radar;
- Middle Atmosphere;
- Phased Arrays;
- Power Amplifiers;
- Radar Antennas;
- Upper Atmosphere;
- Antenna Feeds;
- Antenna Radiation Patterns;
- Electrical Impedance;
- Meteorological Radar;
- Phase Shift;
- Pulse Radar;
- Transmitter Receivers;
- Yagi Antennas;
- Meteorology and Atmospheric Dynamics: Middle atmosphere dynamics;
- Meteorology and Atmospheric Dynamics: Instruments and techniques;
- Radio Science: Remote sensing;
- Radio Science: Instruments and techniques