Research and Design of Field of View for PAF

Radio telescope is a reflector antenna for receiving radio signals radiated by cosmic celestial body, and microwave receiver is a signal receiving device placed at the focal position of radio telescope. Because of the limited beam width, single beam receiver can only observe the sky area with fixed field of view. In order to improve the observation efficiency of telescope, multi-beam receiver came into being, because it can apply multiple beams at the same time, especially for sky survey or mapping observation. Phased array receiver is a classification of multi-beam receiver. Compared with the traditional multi-beam receiver composed of discrete feed array, the adjacent beams formed by phased array receiver overlap each other, so the field of view of the telescope formed by combining with radio telescope is not only larger, but also more continuous, which can further improve the observation efficiency. Based on the beam width and equivalent field of view of the radio telescope with reflector antenna, combined with the definition of telescope beam deviation and simulation software, this paper analyzes and compares the beam performance of the telescope in the case of multiple continuous beams, and gives the design method of the field of view of phased array receiver. The above work has certain guiding significance for the realization of the front-end array size and field of view of phased array receiver used for reflector antenna, and the array design can be constrained in combination with the field of view requirements in the future.