Applications of microwaves (terrestrial and satellite communications, radar, remote sensing, wireless), system requirements for elements which must be analyzed and synthesized. Propagation modes (TEM, TE, TM, quasi-TEM), attenuation and dispersion of general waveguides. S-parameter matrix. Analysis of circuit components (impedance transformers, directional couplers, hybrids, circulators, filters).
Theory and main applications of microwave systems.
Introduction
Frequency bands in the electromagnetic spectrum. Microwaves and millimeter waves. Applications of microwave engineering to communication systems and sensing. Basic radar operation.
Metallic waveguides
Modes of cylindrical structures and transmission lines. TEM, TE and TM modes. Parallel plate waveguide. Rectangular waveguide. Planar waveguides (microstrip, stripline). Power loss in metallic waveguides.
Microwave resonators
Series and parallel resonances. Quality factor Q. Transmission line resonators. Rectangular waveguide cavities.
Microwave network analysis
Equivalent voltages and currents. N-ports microwave networks. Impedance and admittance matrices. The scattering matrix. Generalized scattering parameters. Lossless networks. Reciprocal networks. Measurements with a vector network analyzer.
Impedance matching and filters
Quarter-wave transformer. The theory of small reflections and wide-band impedance matching networks. Binomial multisection matching transformers. Analysis of periodic structures. Introduction to microwave filters.
Microwave components
Passive components: junctions, power dividers, hybrid junctions and directional couplers. Introduction to active components. Intermodulation distortion. Definition of two-port power gains.
D.M. Pozar, Microwave Engineering,
Wiley, 2004.
C.G. Someda, Electromagnetic Waves, CRC Press, 2006.
Lectures.
Written and oral exam.