Lecturer: Prof. Alexander Kölpin
Contents:
Mobile radio channel: radio channel properties, radio channel modeling, modulation techniques, digital modulation
Mobile communication systems: Car-2-X, hybrid and ultra-low power communication systems (wake-up receivers, sub-GHz systems, RFID)
Radar: Pulse, Doppler and Continuous Wave, FMCW radar
Lecturer: Prof. Alexander Kölpin
Contents:
Amplifier: S-Parameters, stability, gain definitions; Bipolar Junction Transistor and HBT, MESFET and HEMT; Circuit applications, nonlinear distortions, low noise and power amplifier
Mixer: Conversion matrix analysis; pn- and Schottky-diode, FET; Circuit applications, conversion gain and noise figure
Oszillator: Oscillation start-up, steady state operation, stability; IMPATT-diode, Gunn-element, FET; oscillator stabilization
Linear passive circuits: Planar microwave circuits, quarterwave matching circuits and discontinuities, lowpass-filter and bandpass-filter synthesis
Design of active circuits
Lecturer: Prof. Alexander Kölpin
Contents:
Modern high-frequency systems benefit massively from machine learning methods. In applications where rule-based algorithms reach their limits, these data-driven approaches enable a significant increase in resolution and accuracy. This is exemplified by current research challenges, namely for the classification of targets in autonomous driving radar systems, radar-based gesture recognition for smart home applications and device control as well as in the field of medical technology for the contactless monitoring of human vital signs.
Lecturer: Dr.-Ing Fabian Lurz
Contents:
Circuit theorems
N-port circuits
Periodic excitation of linear circuits
Transient analysis in time domain
Transient analysis in frequency domain; Laplace Transform
Frequency behaviour of passive one-ports
Lecturer: Prof. Alexander Kölpin
Contents:
Antennas: Analysis - Characteristics - Realizations
Radio Wave Propagation
Transmitter: Power Generation with Vacuum Tubes and Transistors
Receiver: Preamplifier - Heterodyning - Noise
Selected System Applications
Lecturer: Prof. Alexander Kölpin
Contents:
Frequency multiplier: Harmonic balance, noise in nonlinear circuits; Step Recovery Diode, FET; circuit synthesis, large signal, noise, and stability analysis
Low Noise Amplifier (LNA) circuit design: Stability and stability circles, gain and gain circles, noise, noise figure and noise figure circles
Mixer, oscillator: Measurement techniques (Network analyzer, Spectrum analyzer, Frequency generator)
Design of active circuits
Additionally to this module a practical exercise is offered where students design, build and evaluate komponents of a X-band satellite receiver (Low-Noise Amplifier, Mixer, Oscillator) in small groups.