Radio Circuits and Devices
- Garant předmětu:
- Department of Radioelectronics
The first part contains a basic but systematical description of fundamental types of analog and digital modulations. A description of the building blocks of radio communication systems and basic types of radio receivers follows. A description of passive and active elements with non-distributed and distributed parameters follows from the point of view their usage in radio circuits. Attention is devoted to contemporary structures with distributed parameters, microwave transistors of various types, power unipolar transistors. A description of radio function blocks is a fundamental part of the subject: radio-frequency amplifiers and their noise properties, distributed amplifiers, power amplifiers, oscillators, phase noise, crystal oscillators, mixers, double and multiply-balanced mixers.
- Syllabus of lectures:
1. A detailed description of analog modulations (AM, DSB), equations in time domain, spectral and energetic properties.
2. A detailed description of analog modulations (PM, FM), equations in time domain, spectral and energetic properties, stereo in FM, pre-emphasis and de-emphasis.
3. A detailed description of digital modulations (ASK, FSK, and PSK), time domain and basic spectral properties. Constellation diagrams.
4. Other frequently used digital modulations and their properties: GMSK, Pi/4 QPSK, and OFDM. Gray code.
5. A detailed description of Orthogonal Frequency Division Multiplexing (OFDM), time domain and spectral properties, guard interval, pilot signals. Single frequency network (SFN).
6. Principle of spectrum spreading of radio signal. Principle of channel coding in radio communication systems, code rate, systematic code, examples of coding and decoding.
7. Blocks of radio communication systems. Frequency mixer, mixing products, reciprocal mixing, input and output filters. Phase Locked Loop (PLL), block scheme description, basic parameters, applications.
8. Basic types of radio receivers. Superhets with single and double mixing. Reception of mirror frequency signal. Auxiliary circuits of radio receivers. Basic parameters of radio receivers, measurements.
9. High-frequency properties of passive elements C, L, and R. Parasitic elements, their frequency properties, ESR, Q. Defining passive two-ports and three-ports by a system of S-parameters. Resonant circuits. High-frequency filters, SAW.
10. High-frequency BJT, HBT, MESFET, pHEMT, and SiGe transistors, power MOSFET and LDMOSFET. Noise properties of high-frequency transistors.
11. High-frequency amplifiers, LNA. Distributed amplifiers, fundamental principle. Power radio-frequency amplifiers, power optimization, efficiency optimization etc.
12. Noise properties of radio-frequency circuits. Fundamental physical noise sources and their mathematical description. Noises of passive and active elements of radio circuits. Fundamental ways of noise optimization of RF circuits.
13. Classical Oscillators in Radioelectronics (Colpitts, Clapp, Hartley, etc.). Voltage-controlled oscillators (VCO), PLL. Crystal oscillators, transient.
14. Fundamental diagrams of mixers. Balanced and double balanced mixers. Mixers with diodes, BJTs, and MOSFETS.
- Syllabus of tutorials:
The exercises consist of laboratory measurements and seminars selected in the way to cover topics of the lectures for better understanding of radio circuits and devices. There will be arranged a measurement of radio filters, measurements of amplifiers of various classes, including a power amplifier of a radio transmitter, measurements of oscillators and mixers including a determination of IP1 and IP3, and measurements of various parameters of radio receivers.
1. A-, AB-, B-, and C-class amplifiers, amplification of amplitude modulated signal
2. Oscillator design, construction and measurement
3. Mixer with IF filter, mixing products, IP1, IP3, transfer characteristics of filter
4. Parameters and characteristics of AM radio receiver
5. Parameters and characteristics of FM radio receiver
6. Parameters and characteristics of radio transmitter
7. Characteristics of PLL, application for demodulation
8. Digital video broadcasting DVB-T, spectral and signal analyses, single frequency network
9. Cascade synthesis
10. High-frequency properties of passive elements
11. Receivers, mirror frequency, double mixing
13. Amplifier, differential amplifier, selective amplifier
14. Mixers, conversion parameters
- Study Objective:
- Study materials:
Literature (recommended, not mandatory):
Vendelin, G.D., Pavio, A.M., Rohde, U.L.: Microwave Circuit Design Using Linear and Nonlinear Techniques.
Wiley-Interscience, 2005, 1058 str. ISBN 0-471-41479-4.
Caverly, R.: CMOS RFIC Design Principles. Artech House, 2007, 435 s. ISBN 978-1-59693-132-9.
Sodagar, A.M.: Analysis of Bipolar and CMOS Amlifiers. CRC Press, 2007, 411 str. ISBN 1-4200-4644-6.
Nelson, C. High-Frequency and Microwave Circuit Design. CRC Press, 2008, 162 str. ISBN 978-0-8493-7562-0.
(+ http://radio.feld.cvut.cz/personal/dobes2/dobes.en.pdf (PDFs for Education))
- Further information:
- No time-table has been prepared for this course
- The course is a part of the following study plans: