11:15 AM - 11:30 AM
[MIS29-09] The examination of antenna performance for the calibration of Phased Array Radar
Keywords:phased array radar, weather radar, array antenna, calibration
In general, weather radar measures backscatter cross section of targets to make meteorological observations. We can know a weather condition by assigning it to radar equation. Radar equation includes radar constant which is determined by transmission power, transmission gain, receiver gain, and beamwidth; therefore we need to calibrate them to make the observation accurate.
In addition, each antenna elements of PAR has a bias error individually. the digital beam forming method cannot work well to form the received beam pattern. Therefore we take the bias error of each array into account when we calibrate PAR.
Here, we measured PAR's antenna pattern of transmitted and received beam to know actual gain and beamwidth. Furthermore, we measured the phase of the received signal, and compared it to the phase expected. From the result of the comparison, we calculated the bias error of each array and proposed the method of phase error correction.