Satellite Telecommand System Emitter

The article presents various types of antennas of the satellite telecommand system, their main characteristics, advantages and disadvantages. As the literature review shows, printed, turnstile and spiral antennas are mainly used, and the use of printed antenna arrays is also developing. Due to its small overall dimensions, mechanical strength and manufacturability, a printed radiator with a special butterfly-type shape was chosen as the antenna being developed due to its good electrodynamics properties. The design of a printed-circuit emitter of a satellite telecommand system is presented in the form of two crossed vibrators located on different sides of the printed-circuit board at a distance of 20 mm from the screen, with a bandwidth of 1.77\u20132.59 GHz at the SWR 2 level, a beam width at the central frequency of 64\u00b0, and an ellipticity coefficient at the central frequency of more than 0.7.