共用天线
4.This paper introduces the uses、the working principle、 the circuit diagram、 the technical specifications and the selection of component parameters of the TV band pass mixer in the front-end device of CATV and describes the methods of manufacture and debugging in detail.
5.This paper presents a design method of coaxial feed that is common in S/X band,has different illumination angle of -10 dB in S and X band and can be used to illuminate a radio telescope antenna with a diameter of 50 m. The relative operation bandwidth of S and X bands is 20%.
