Learning Outcomes
1. Scattering matrix and other matrix representations.
2. Waveguide excitation via probes and aperture coupling.
3. Detailed analysis of 3- and 4-port typical passive networks, such as the Wilkinson divider, 90o or 180o hybrids (rat race) or coupled-line directional couplers.
4. Elements on microwave filters.
5. Understanding of ferrite material properties and the operation of ferrite devices.
6. Microwave PIN diodes and associated circuits (switches, phase-shifters, etc).
7. Thorough understanding of microwave transistors (stability, gain) and design of single-stage microwave amplifiers.
Course Content (Syllabus)
Complex impedance and admittance matrices. Scattering matrix and ABCD matrix. Excitation of waveguides and aperture coupling. Waveguide iris. Power splitters and directional couplers: Wilkinson divider, 90ο hybrid, coupled-line directional couplers, 180ο hybrid, magic T. Microwave resonators: dielectric resonators, Fabry-Perot resonators, resonator coupling through gaps or apertures. Microwave filters. Ferrites and ferrite devices: magnetic permeability tensor, plane-wave propagation in ferrites, Faraday rotation, isolators, phase-shifters, gyratron, circulators. Detectors and mixers, single-ended mixer, balanced mixer, image-rejection mixer. PIN diode circuits, switches and phase-shifters. Microwave sources, tubes, GUNN and IMPATT diodes. Microwave transistors: FET and bipolar. Microwave amplifiers: gain and stability. Design of microwave amplifiers. Laboratory experiments: KLYSTRON tube, GUNN diode, measurement of frequency, wavelength, power, SWR and impedance, vector network analyzer measurements.
Keywords
Transmission lines, scattering matrix, directional couplers, filters, ferrite devices, PIN diode circuits, microwave amplifiers