Angle measurement method for two targets within antenna beam width using two receivers

Monopulse angle measurement methods are often utilized to measure a target angle. However, this method cannot measure a correct angle for multiple targets which cannot be distinguished by range, Doppler frequency and beam width. A method to simultaneously measure azimuths and elevations for only two targets was proposed, which requires a low computational load compared with other methods. However, the conventional method requires four receivers, therefore it is difficult to utilize it when there is a hard ware limitation. In this paper, we propose a method to measure azimuths and elevations for two targets using two receivers and time division system. We also show a verification of the proposed method by a numerical simulation and experimentation, though measured angles are restricted to azimuths or elevations. The results show that two targets angles can be measured by our proposed method using two receivers.