Course
PostgraduateSemester
Sem. ISubject Code
AVR612Subject Title
Microwave Circuits and SystemsSyllabus
Introduction to Wireless Systems: Classification of wireless systems; Design and performance issues include the choice of operating frequency, multiple access and duplexing, circuit switching versus packet switching, propagation, radiated power and safety; Cellular telephone systems and standards. Noise and Distortion in Microwave Systems cover basic threshold detection, noise temperature and noise figure, noise figure of a lossy transmission line, and noise figure of cascade systems which include noise figure of passive networks, two-port networks, mismatched transmission lines, and Wilkinson power dividers. It also discusses dynamic range and inter-modulation distortion.
Resonators focus on the principles of microwave resonators, loaded, unloaded and external Q, open and shorted TEM lines as resonators, microstrip resonators, and dielectric resonators.
Power Dividers and Couplers examine the scattering matrix of - and -port junctions, design of T-junction and Wilkinson power dividers, and the design of 90° and 180° hybrids.
Filters are analyzed through periodic structures, Floquet’s theorem, and filter design by the insertion loss method, including maximally flat and Chebyshev designs.
Microwave Amplifier Design compares active devices such as BJT, MOSFET, MESFET, HEMT, and HBT, circuit models for FETs and BJTs, two-port power gains, and the stability of transistor amplifier circuits. Amplifier design using S-parameters includes design for maximum gain, maximum stable gain, design for specified gain, low-noise amplifier design, and design of class-A power amplifiers.
Mixers cover mixer characteristics like image frequency, conversion loss, and noise figure, and devices for mixers such as PN junctions, Schottky barrier diode, and FETs. Diode mixers include small-signal characteristics of diode, single-ended mixer, large-signal model, and switching model. FET Mixers cover single-ended mixers and other FET mixers, balanced mixers, and image reject mixers.
Switches discuss devices for microwave switches such as PIN diode, BJT, and FET, including device models, types of switches, switch configurations, basic theory of switches, and multi-port, broad-band, and isolation switches.
Oscillators and Frequency Synthesizers include general analysis of RF oscillators, transistor oscillators, voltage-controlled oscillators, dielectric resonator oscillators, frequency synthesis methods, analysis of first and second order phase-locked loop, and oscillator noise and its effect on receiver performance.
Text Books
Same as Reference
References
1. Microwave and RF Design of Wireless Systems, Pozar, D. M John Wiley & Sons, 2001.
2. Microwave Transistor Amplifiers: Analysis and Design, Gonzalez, G., 2nd Ed., Prentice- Hall, 1997.
3. Microwave Solid State Circuit Design Bahl, I. and Bhartia, P., , 2nd Ed., John Wiley & Sons, 2003.
4. RF and Microwave Circuit and Component Design for Wireless Systems, Chang, K., Bahl, I. and Nair, V., Wiley Interscience, 2002.
5. RF/Microwave Circuit Design for Wireless Applications Rohde, U. L. and Newkirk, D. P., , John Wiley & Sons, 2000.
6. RF and Microwave Circuit Design for Wireless Applications, Larson, L. E., Artech House, 1996.
Course Outcomes (COs):
CO1: Learn and familiarize the wireless communication system and circuits, passive and active devices in terms of its gain and noise performance, link budget equations and its importance in wireless circuit.
CO2: Learn the basics of transmission line for interconnect design, characteristic impedance, scattering parameters for different microwave network, and passive microwave circuit design.
CO3: Evaluate the importance of matching circuit design considering lumped and transmission line and analyse RF transistors and FETs and their high frequency behaviour.
CO4: Compare active devices such as BJT, MOSFET, MESFET, HEMT, and HBT
CO5: Design microwave amplifiers for specified gain, power and noise performance. Understand use of packaged transistor model to design different driver, LNA and Power Amplifier.
CO6: Analyze non-linear microwave active circuits and design different mixing components
CO7: Design RF and microwave circuit using CAD.