( in italiano )
Microwave systems and circuits ( 9 CFU )
Prof. Giovanni Chiorboli
     Phone: 0521.905809 - Fax: 0521.905822           E-mail. giovanni.chiorboli@unipr.it           Home page. http://ee.unipr.it/~chi
Prof. Andrea Boni
     Phone: 0521-905815 - Fax: 0521-905822           E-mail. andrea.boni@unipr.it           Home page. http://ee.unipr.it/~andrea/

Objectives
The course aims at providing advances knowledge in the design of microwave circuits, with special emphasis to:
1 transmission lines and , microstrips
2. impedance matching (line, noise and power)
3. hybrid circuits, couplers, power divider, detector and mixers
4. microwave active circuits: Low-noise amplifiers (LNA) and tuned oscillators (VCO)
5. architectures of wireless transceivers

Program
PART A
1. Matrix representation of two-port networks (S-,Z-,Y- and ABCD parameters) Calibration of coaxial and in-fixture VNA measurements Signal-flol graphs. Mason's rule.

2. Resonators - Q, Transmission-line resonators, Cavity resonators, Dielectric resonators

3. Power dividers and couplers - T-junctions, Magic Tees, and Wilkinson power dividers, Hybrid couplers, Coupled line and Lange couplers, Circulators, Isolators.

4. Microwave Filters - Periodic structures, Filter design by the insertion loss method, Low-pass prototype: Butterworth, Chebysheff and Cauer. Frequency transformations. Planar filter circuit implementations.

5. Thermal and diode-based detectors. Sensitivity, noise. Passive mixers. Logarithmic detectors.

6. Laboratory: filter and coupler design using ADS

PART B

1. Transceivers’ architectures and RF basics
Black box schematic of an RF transceiver; non linearity issues: desensitization, cross-modulation, CP and IIP3, cascaded of non-linearity; noise issue: NF. Receiver sensitivity, selectivity and dynamic range. Super-heterodyne receiver: architecture, advantages and issues. Homodyne receiver: architecture, advantages and issues. Image-rejection receivers: Hartley and Weaver solutions. Transmitter’s ACP. Transmitter architectures: direct-conversion and double conversion: advantages and issues..

2. Matching
Noise, power and line matching. Matching networks: using discrete components or microstrip. Stub: single and double stub matching techniques. Using the Smith chart in the design of the matching networks.

3. LNA (Low Noise Amplifier)
Gain consideration: power gain, transducer power gain and available power gain; Noise consideration. Stability consideration. Constant gain, noise and stability circles. Amplifier design: optimizing for power and noise. Design of integrated LNA.

4. Mixer
Mixer spec.s. Design of single transistor mixers. Integrated mixers.

5. VCO and PLL
Design of RF VCO. Phase noise and tuning range.

6. CAD laboratory
Design and simulation of RF blocks (mixer, lna, VCO) using ADS.


Examination methods
Oral exam


Suggested textbooks
Bahl I., Bhartia P., Microwave Solid State Circuit Design, John Wiley & Son
B. Razavi, “RF Microelectronics”, Prentice-Hall.
David M. Pozar, “Microwave Engineering, 2nd edition”, Wiley
T. H. Lee ``The design of CMOS Radio-Frequency Integrated Circuits'', Cambridge University Press

 
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