This course introduces students to the basic design and analysis of radio frequency (RF) circuits and communication systems.  It starts with a review of fundamental principles in electromagnetic (EM) transmission and signal propagation, through analysis of circuit components behaviors at high frequency, RF amplifier, mixer, modulator, demodulator, and oscillator circuit topologies, all the way to the basic system communication theory behind the RF transceiver operation.  Some aspects of the analysis and design of microwave components and systems will be covered. Students will be introduced to modeling of high frequency circuits; transmission lines; scattering parameters; impedance matching; passive microwave components; noise in receivers; elemental antennas and simple and phased arrays antenna systems.  An overview of the technology behind current trends in RF systems designs (including 4G, 5G, and IoT) will be presented.