This publication is a printed version of an electronic textbook on the discipline "Theory of Radio Circuits and Signals". The manual includes a short course of lectures, demonstration examples and tasks for computer modeling. The workshop includes theoretical solution of problems in individual sections of the course and work on computers in the MatLab, MathCad, and Multisim (Electronics Workbench) environment for modeling radio signals and circuits. For students of the specialization "Organization of radio technical support for aircraft flights" and the profile "Operation of ground-based radio technical support for aircraft flights and aviation telecommunications."