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.
Transmission Lineaìs
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 networks:
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:
Quarter-wave transformer. The theory of small reflections and wide-band impedance matching networks. Binomial multisection matching transformers. Analysis of periodic structures.
Microwave resonators:
Series and parallel resonances. Quality factor Q. Transmission line resonators. Rectangular waveguide cavities.
Microwave components:
Passive components: junctions, power dividers, hybrid junctions and directional couplers. Introduction to active components. Intermodulation distortion.
Microwave filters:
Periodic Structures; Filter Design and transformations; Coupled Line filters; Filters with coupled resonators.
D.M. Pozar, Microwave Engineering,
Wiley, 2004.
C.G. Someda, Electromagnetic Waves, CRC Press, 2006.
Lectures.
Written and oral exam.
The course is aimed at students of the master’s degrees in “Communication Technologies and Multimedia” and “Electronics Engineering”.