Lederer, DimitriDenis, ThéoThéoDenis2025-05-142025-05-142025-05-142023https://hdl.handle.net/2078.2/33648Frequency Modulated Continuous Wave (FMCW) radars are crucial components of new driver assistance systems like Adaptive Cruise Control(ACC). The advantage of those systems for automotive applications compared to cameras or laser is their robustness to all weather conditions. Currently, the 77 GHz frequency band dominates the industry because of the wide available bandwidth offering improved range resolution. With the increasing number of FMCW radar-equipped cars on the roads, the likelihood of interference between vehicles is growing. It could lead to wrongful estimation of distance, speed and the number of obstacles. Two solutions can be envisioned to counteract these phenomena: multiplexing the signals like in telecommunication systems or moving to other frequency bands. Leading industries and academics have pinpointed the D-band frequencies (110-170 GHz) as potential resources for new automotive and beyond 5G telecommunication systems with emphasis on the sub-range of 134-141 GHz for FMCW radar. The emission and processing of the signal are usually done with components like Power Amplifier (PA), Low-Noise Amplifier (LNA), filters, oscillators, frequency multipliers and mixers. This work focuses on the design and measurement of a new mixer in the sub-frequency ranges 130-150 GHz of the D-band spectrum and on the design of an IQ mixer offering advantages such as increased short to mid-range resolution and image rejection. The design is done using the commercially available substrate RT/Duroid 5880, Schottky diodes AP12/G2/3P80 from Teratech in an E-plane split-block waveguide packaging. Measurements show a conversion loss better than 12 dB across the whole 130-150 GHz bandwidth for a local oscillator (LO) feeding power between 4-6 dBm.FMCWMixerRadarD-bandtext::thesis::master thesisthesis:43221