Expanding the capabilities of automotive radar for bicycle detection with harmonic RFID tags at 79/158 GHz

TT Braun, J Schöpfel, P Kwiatkowski… - IEEE Transactions …, 2022 - ieeexplore.ieee.org
Although traffic safety continues to improve overall, fatalities of vulnerable traffic participants
and pedal cyclists specifically have reached 30-year highs. While automotive radar sensors …

A 360 GHz fully integrated differential signal source with 106.7 GHz continuous tuning range in 90 nm SiGe: C BiCMOS

D Starke, F Vogelsang, J Bott, J Schöpfel… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
Commercial frequency-modulated continuous-wave (FMCW) radar systems are well-established
in the frequency range up to 100 GHz, with some exceptions operating in the D-band …

Over-the-air synchronization for coherent digital automotive radar networks

…, LG De Oliveira, Z Kollár, J Schöpfel… - … on Radar Systems, 2024 - ieeexplore.ieee.org
Radar networks can offer superior performance compared to individual sensors. However,
synchronization is crucial for realizing such a radar network coherently. Digital systems, in …

A High Linearity SiGe D-Band Diode Ring Mixer

O Krylova, J Schopfel, K Aufinger… - 2023 IEEE BiCMOS and …, 2023 - ieeexplore.ieee.org
Although the SNR and thus the maximum range of FMCW radar systems benefit from high
output powers, they can conventionally be limited by the receiver linearity. As a solution, we …

A 61-GHz SiGe transceiver frontend for energy and data transmission of passive RFID single-chip tags with integrated antennas

C Bredendiek, DA Funke, J Schöpfel… - IEEE Journal of Solid …, 2018 - ieeexplore.ieee.org
This paper presents SiGe-based transmitter and receiver chips for a radio frequency identification
(RFID) frontend in the 61-GHz industrial, scientific, and medical (ISM) frequency band. …

A 335–407-GHz SiGe-based subharmonic mixer using a fully integrated LO generation

J Bott, D Starke, F Vogelsang, J Schöpfel… - IEEE Microwave and …, 2024 - ieeexplore.ieee.org
This letter introduces a silicon–germanium (SiGe)-based subharmonic mixer (SHM)
optimized for THz radar applications, operating at a center frequency of 360 GHz with a 3-dB …

A static frequency divider up to 163 GHz in SiGe-BiCMOS technology

F Vogelsang, C Bredendiek, J Schöpfel… - 2022 IEEE BiCMOS …, 2022 - ieeexplore.ieee.org
This work presents a static divide-by-16 in a 130-nm SiGe-BiCMOS technology, aiming to
demonstrate the technologies’ potential. A bias network followed by four divide-by-2 stages …

A harmonic automotive radar for bicycle detection with RFID tags at 79/158 GHz

TT Braun, J Schöpfel, C Schweer… - 2022 IEEE/MTT-S …, 2022 - ieeexplore.ieee.org
We present a harmonic radar system based on an RFID tag to improve traffic safety for outside
vehicles like pedal cyclists. The tag consists of a high gain amplifier chain focused on low …

Introducing Inharmonic Radar: Tag Detection in the Automotive Bands of Present and Future at 76–81/134–141 GHz via Fractional Multiplication

TT Braun, J Schöpfel, C Bredendiek… - IEEE Journal of …, 2024 - ieeexplore.ieee.org
Harmonic radar systems are highly effective at distinguishing specific targets from surrounding
clutter. Therefore, the reception of a tag response, conventionally at the second harmonic, …

Detecting vulnerable road users utilizing the harmonic RCS of active tags at 79/158 GHz

TT Braun, J Schöpfel, N Pohl - 2023 IEEE Radar Conference …, 2023 - ieeexplore.ieee.org
Vulnerable road users have not been able to benefit equally from the improved traffic safety
supported by automotive sensors. In 2020 this culminated in traffic fatality highs of more than …