System integration and subproject leadership as a system engineer for train control and train radio systems

• Project management of the radio system and antenna design.
• Selection of suitable simulation methods.
• Selection of an optimal transceiver module (CC1100 @ Chipcon/TI).
• Investigation and definition of all RF parameters of the transceiver.
• Analysis of radio wave propagation in indoor environments (experimental and theoretical).
• Oversight of antenna design and layout optimization for harmonics measurement.
• Complete execution of radio acceptance tests.

Complete simulation, full circuit design & layout creation of several MMICs for radar signal processing in the frequency range up to 5 GHz for an ultra-wideband application of a building wall measuring device.

Specifically, design of the complete RF frontend with receiver (Balun, LNA, mixer, demodulator, filter) and transmitter (modulator, pulse amplifier, balun) under subcontract for Bosch.

The goal was also to achieve minimal power consumption for battery-powered use.

Design of a 10 GHz diode ring mixer in a particularly compact form factor under subcontract for EADS.

• Design, simulation and optimization of microwave connectors up to 30 GHz for automotive and measurement technology applications. Specifically designing connectors for car roof antennas operating up to 6 GHz (end customer BMW).
• Conceptual design and full analog and digital hardware and software development (in C#) of a high-frequency cable tester for production tests.

• Optimization of interference susceptibility of radio keys for automotive applications, including calculations (with extensive tolerance studies) and design of passive analog RF filters and RF acceptance tests.
• Pre-development and subproject management of an ultra-wideband keyless entry system for automotive applications.
• System verification of the ultra-wideband keyless entry system as a test engineer using GNU Octave (mostly compatible with MATLAB).

• Design and simulation of various antenna structures using HFSS (including layout creation).
• Measurement verification of the antenna designs.
• Overall optimization with all existing electrical coupling structures—especially the charging coil and an optionally available NFC antenna.
• Change request management for spare parts procurement in ongoing production.
• Testing and technical support for optimizing the Java control software for a measurement robot.

• Primarily for the UHF range.
• Specifically – design of UHF RFID antennas using CST Microwave Studio.

• Designed the analog circuit and digital interfaces (such as connecting to high-resolution analog and digital converters), including selecting all components.
• Performed comprehensive calculations for noise optimization and ran simulations to optimize the settling behavior using (LT-)SPICE.
• Oversaw schematic and layout development, including the processor and digital section.
• Conducted all development-related tests and measurements at the customer site, including full commissioning of the circuit.
• Prepared MTBF calculations, including for the processor and digital section.
• Created all development documentation.

• Detailed written development of specification requirements for all technical details.
• Collaborated technically with the development partner in England on electronics (including wireless and microcontroller technology), firmware, and (precision) mechanics.
• Pre-selected VOC, CO, and CO2 sensors.
• Performed power budget calculations and optimizations, especially for battery-powered wireless communication.
• Conducted metrological testing of various VOC, CO, and CO2 sensors.
• Defined wireless communication and communication protocols (e.g., Narrow-Band LTE, 868 MHz ISM band, and Bluetooth).
• Worked in agile sprints using Jira according to the Scrum Master process.

• Revision of the DOORS requirements specification documents for the system definition of interface devices to connect relay interlockings to modern digital interlockings.
• Implementation of customer requirements into the Thales internal system specification using DOORS.
• Revision of software workflows in the SysML system description language.

• Further development of roof antenna concepts for shunting locomotives to achieve optimal radio connection availability.
• Comprehensive calculations and risk analyses for the simultaneous use of various radio devices for remote control, ETCS, GSM-R, WLAN, LTE & 5G, and satellite navigation.
• Test planning for the radio devices (functional and type approval tests).

Objective was the highly accurate, absolute position determination of industrial autonomous transport vehicles.

A 64 GHz frequency band microwave sensor system was designed, and a system with optical grating lines and optical sensors for position detection was implemented.

The microwave sensor system is based on transforming the well-known GPS satellite navigation systems into the 64 GHz frequency band, which automatically results in a correspondingly increased accuracy of position determination.

Simulation of the complete system and the position determination during operation, selection of suitable semiconductor manufacturing technologies for the 64 GHz range, building and mechanical design of a model vehicle, measurement verification of the optical position measurement system.

Concept, subproject management and complete implementation of a multiprocessor system (based on Z80), design of all digital electronics of the system, application of psychoacoustic methods for data reduction (typical factor 8 to 16) in collaboration with the Institute for Broadcasting Technology (IRT) in Munich.

In particular, worked on the implementation of the digital signal processing of the data reduction method (MP3 precursor).