Portale di Ateneo - En.Unibs.it

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.