Wittemeier, JonathanJonathanWittemeierPohl, NilsNilsPohl2026-02-142026-02-202026-02-142023https://publica.fraunhofer.de/handle/publica/50711410.1109/IWMTS58186.2023.102078572-s2.0-85169474754Nowadays, radar systems are used for an increasing number of civil applications, which leads to a steadily expanding number of radar sensors. This increases the risk of interference and mutual disturbance. Phase-modulated continuous wave techniques (PMCW) can remedy this situation using orthogonal transmit codes. PMCW can be realized with an analog vector modulator (VM) in combination with a DAC. This paper presents a VM that directly uses 1.2 V digital control signals to enable phase shift keying without using a DAC. The VM has a center frequency of 125 GHz and is based on four compactly integrated power amplifiers (PAs).enfalseBiCMOSBIIHFCBPSKCDMcode-divisionD-bandjoint radar-communicationMIMOmultiple-input multiple-outputphase-codedphase-shifterphased-arrayPMCWPNpseudo-noiseradarRadComSiGesilicon-germaniumTDMtime-divisionvector modulatorVMThzTerahertzconference paper