Presentation
The performance of communications systems, in general, are and will always be dependent on physical media for the transmission of informations. Radiofrequencies and microwaves are intensively exploited to support and deliver data and video streams between communication devices, ensuring flexibility and reconfigurability in a context of mobility.
It is thus important, for future engineers in the domain of information technologies, to be sensitized to techniques and design methods for analog RF and microwave devices.
Theoretical and practical basis will be presented, offering the opportunity to understand physical and electrical mechanisms involved in the design of analog RF and microwave sub-components used in radio frequency communication system.
Prerequisites
- Basic knowledge on mathematical tools for analysis and synthesis of electronic circuits.
- Bases in electromagnetism
- Theory of transmission lines (Smith chart, ..) including CAD tools
Related teached lectures:
- TC 111C: Transmission Systems
- TC 101C: Harmonic analysis and distributions
- TC 101D: Waves and electromagnetic media
Objectives
Detail the RF transceiver architectures and system requirements (depending on access techniques, etc ...)
Establish the link between the expected performance of a system and the constraints associated with subsets RF component (concept of link budget)
Describe the main parameters of analog RF functions, and identify the basic characteristics and parameters to control and optimize
Make students aware of a design process for such basic devices, relying in particular on dedicated CAD tools
Duration:
28h30
Content
Course 1: Communication Systems - RF segment analysis
- Propagation guided / non-guided in a "system"
- Generic Architectures of radio communication systems
- Identification of linear and non-linear analog functions
- Link Budget
Course 2: Link Budget - Antennas characteristics
- Integration technologies
- EIRP and propagation
- Introduction to antennas
- Antenna characterization : Key parameters
PC1: Synthesis of a microstrip antenna - Analytical Approach
Course 3: radiating elements: antennas
- Associate model
- Antenna Radiation - Corresponding model
- Antenna network: basis and constraints
PC2: microstrip antenna: radiation and network
Courses 4 and 5: Amplification
- Aplification Principle and associated models
- Biasing and operating conditions
- High-frequency transposition - design
PC3: High Frequency Amplifier - Design Method
Course 6: Non-linear devices
- The power amplifier: non-linear operation
- The mixer: general principles
- Non-linearity: Analysis by Fourier series decomposition.
BE 1 : Study of a non-linear function: the mixer
Course 7: RF filter
- Definition - technologies
- RF synthesis techniques
- Limitations and design methods
BE 2 : Synthesis of a semi-lumped filter
Organization
Examination
BE 1 and 2 will be done by binomial. Simulation on elementary circuits (mixer and filter) will be performed, on the basis of CAD (Orcad Pspice & Aplace respectively).
A report is required per binomial at the end of these two BE, and one of the report is evaluated.
Scheduled activities
- C1 (1h30) Systèmes de communication - analyse du segment radiofréquence
- C2 (1h30) Bilan de liaison - Propagation et introduction sur les antennes
- PC1 (1h30) Conception d'une antenne microruban de type patch : modèle analytique
- C3 (1h30) Les antennes : rayonnement et mise en réseau
- PC2 (1h30) Antenne Patch : modèle de rayonnement - calcul de la mise en réseau
- C4 (1h30) Amplification - Modèles et classes de polarisation
- C5 (1h30) Amplification haute fréquence - modélisation et conception
- PC3 (1h30) Conception d'un amplificateur haute fréquence
- C6 (1h30) Fonctions non linéaires
- BE1 (3h) Modélisation et conception d'un mélangeur
- C7 (1h30) Filtrage RF
- BE 2 (3h) Synthèse d'un filtre par une approche semi-localisée
Team
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