Course detail

HF and Microwave Techniques

FEKT-BVMTAcad. year: 2011/2012

The basic circuits in the frequency range up to 1 GHz. High frequency linear amplifiers, band-pass amplifiers, wide band amplifiers, HF power amplifiers. Oscillators, mixers, AM and FM modulators and demodulators. Phase locked loop systems and frequency synthesizers. Principles and applications of microwave techniques. Co-axial lines, striplines, rectangular and circular metallic waveguides. Resonant cavities. Passive microwave circuits - directional couplers, attenuators, matching loads, phase shifter, nonreciprocal devices.

Language of instruction

Czech

Number of ECTS credits

6

Mode of study

Not applicable.

Guarantor

Ing. Petr Vágner, Ph.D.

Department

Department of Radio Electronics (UREL)

Learning outcomes of the course unit

The students become familiar with the basic circuits in the frequency range up to 1 GHz. High frequency linear amplifiers, band-pass amplifiers, wide band amplifiers, HF power amplifiers. Oscillators, mixers, AM and FM modulators and demodulators. Phase locked loop systems and frequency synthesizers. Principles and applications of microwave techniques. Co-axial lines, striplines, rectangular and circular metallic waveguides. Resonant cavities. Passive microwave circuits - directional couplers, attenuators, matching loads, phase shifter, nonreciprocal devices.

Prerequisites

The subject knowledge on the secondary school education level is requested.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Requirements for completion of a course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.

Course curriculum

1. Microwave measurement basics, pasive parts in high frequency circuits
2. High frequency amplifiers, multiple-stage amplifiers, wideband amplifiers
3. Power amplifiers, modern types with high efficiency
4. Oscillators and mixers
5. Modulators and demodulators
6. Phase locked loop
7. Frequency syntesizer
8. Microwave transmission fundamentals
9. Microwave integrated circuits
10. Microwave resonant circuits
11. Microwave attenuators and phase shifters, matched loads, directional couplers, power dividers.
12. Nonreciprocity microwave ferrite circuits

Work placements

Not applicable.

Aims

The aim of the course is to make students familiar with the basic HF circuits in the frequency range up to 1 GHz, and with the basic microwave techniques in the frequency range up to tens GHz.

Specification of controlled education, way of implementation and compensation for absences

The content and forms of instruction in the evaluated course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

HANUS, S., SVAČINA, J. Vysokofrekvenční a mikrovlnná technika. Skripta FEKT VUT v Brně, 2002, ISBN: 80-214-2222-X
HANUS, S., SVAČINA, J. Vysokofrekvenční a mikrovlnná technika - Laboratorní cvičení. Elektronická skripta FEKT VUT v Brně, 2003, ISBN: REL 119.

Recommended reading

TYSL, V., RŮŽIČKA, V. Teoretické základy mikrovlnné techniky. SNTL Praha 1989
ZINKE, O., BRUNSWIG, H. Lehrbuch der Hochfrequenztechnik. Springer-Verlag Berlin 1986
ŽALUD, V. Moderní radioelektronika. Vydavatelství BEN, Praha 2000
ŽALUD, V. Radioelektronika. Vydavatelství ČVUT, Praha 1993

Classification of course in study plans

  • Programme EEKR-B Bachelor's

    branch B-EST , 3. year of study, winter semester, compulsory
    branch B-MET , 3. year of study, winter semester, optional interdisciplinary

  • Programme EEKR-CZV lifelong learning

    branch ET-CZV , 1. year of study, winter semester, compulsory

Type of course unit

 

Lecture

39 hours, optionally

Teacher / Lecturer

doc. Ing. Jaroslav Láčík, Ph.D.
Ing. Petr Vágner, Ph.D.

Syllabus

High frequency linear amplifiers, resonant circuits, transformation features of coupled circuits, features of active components - their mathematical and physical models, admittance and scattering parameters, circuit functions, stability, noise features.
Narrow band amplifiers, analysis with inside transistor feedback, unilaterilization of inside transistor feedback, selective features, multi-stage amplifiers, amplifiers with distributed tuned circuits, surface acoustic wave filters (SAW) and other filters.
Wide band amplifiers, analysis, determination of lower and upper limit frequencies, distortion of h.f. amplifiers (harmonic, modulating and intermodulating distortion, cross modulation).
High frequency power amplifiers, analysis, dynamical characterizations for different modes, mode classificatins, calculation of output current components, mode change.
Oscilators, feedback oscillators, classical linear theory, stable state, basic connections, crystal controlled oscillators, frequency stability, variable frequency oscillators and their frequency stability. Mixers, calculation of conversion parameters, additive and multiplicative conversion, noise features.
Modulators, direct base and collector amplitude modulators, direct and indirect frequency modulators. Demodulators, diode detoctor analysis, AM demodulator, FM demodulators.
Phase locked loop system, PLL theory, block diagram. Frequency synthesizers, synthesizer without preedivider, synthesize with preedivider, integrated circuits used in synthesizers.
Microwave frequency bands. The basic applications of microwave techniques. The basic microwave transmission structures. Waveguide and co-axial techniques, microwave integrated techniques (MIT).
Metalic waveguides: properties and technical parameters. Co-axial waveguides and transmission lines. Waveguide to co-axial transitions.
Basic types and elements of microwave integrated circuits (MIC). Hybrid integrated circuits. Lumped MICs. Monolitic MICs.
Microwave resonators. Transmission lines resonators, cavity resonators, microstrip resonators, dielectric resonators. Excitation of waveguides and resonators.
Scattering matrices of microwave circuits. Properties and application of scattering matrix.
Non reciprocal microwave circuits. Ferrite isolators and circulators and their applications. Basic types of reciprocal microwave elements and circuits.

Laboratory exercise

26 hours, compulsory

Teacher / Lecturer

Ing. Vlastimil Koudelka, Ph.D.
doc. Ing. Jaroslav Láčík, Ph.D.
Ing. Petr Vágner, Ph.D.

Syllabus

Introduction to high frequency measurements.
Frequency synthetizer.
Testing of power amplifier.
Measurement of mixer components.
Testing of FM modulators.
Microwave power measurements.
Measurements of microwave ferrite cicruits.
Measurements of cavity resonator parameters.
Gunn diode oscillator measurements.
Measurement with the microwave network analyser.