@misc{ManchandaAndreiTostetal., author = {Manchanda, Prabhav and Andrei, Cristina and Tost, Frank and Rudolph, Matthias}, title = {A pHEMT based power detector for radar applications}, series = {2024 54th European Microwave Conference (EuMC)}, journal = {2024 54th European Microwave Conference (EuMC)}, publisher = {IEEE}, doi = {10.23919/EuMC61614.2024.10732043}, pages = {992 -- 995}, language = {en} } @misc{ManchandaOkochaRudolph, author = {Manchanda, Prabhav and Okocha, Jonathan and Rudolph, Matthias}, title = {Improved Sensitivity of Zero Bias Diode Power Detectors using Impedance Tuners}, series = {IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)}, journal = {IEEE Microwaves, Antennas, and Propagation Conference (MAPCON)}, isbn = {978-1-6654-5203-8}, doi = {10.1109/MAPCON56011.2022.10047233}, pages = {1261 -- 1266}, language = {en} } @misc{ManchandaKnaackTostetal., author = {Manchanda, Prabhav and Knaack, Marcus and Tost, Frank and Andrei, Cristina and Rudolph, Matthias}, title = {Digitally reconfigurable power detector}, series = {2025 16th German Microwave Conference (GeMiC)}, journal = {2025 16th German Microwave Conference (GeMiC)}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-3-9820397-4-9}, doi = {10.23919/GeMiC64734.2025.10979055}, pages = {439 -- 442}, abstract = {This paper presents a reconfigurable diode detector operating at 24 GHz, capable of dynamically adjusting its output voltage and linear range through digital control of the load impedance. The variation in load impedance is initially achieved by employing a variable resistor within the baseband amplifier. Subsequently, the same effect is accomplished using a fully digital solution by configuring the internal programmable gain amplifier (PGA) of an analog-to-digital converter (ADC). The detector, the baseband amplifier, and the ADC are fabricated using commercially available components. Experimental results demonstrate that the linear range can be extended significantly by reducing the input impedance of the baseband amplifier, whereas an increase in impedance results in an elevated output voltage. Similar trends are observed when utilizing the PGA within the ADC. The results demonstrate a reconfigurable diode detector that employs digital control to dynamically optimize performance metrics, including output voltage and linear range. This adaptability renders it highly versatile and well-suited for a broad spectrum of modern RF system applications.}, language = {en} } @misc{ManchandaKnaackLiaoetal., author = {Manchanda, Prabhav and Knaack, Marcus and Liao, Juhua and Andrei, Cristina and Rudolph, Matthias}, title = {Detection of vital signs using noncoherent receivers}, series = {2025 22nd European Radar Conference (EuRAD)}, journal = {2025 22nd European Radar Conference (EuRAD)}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-2-87487-083-5}, doi = {10.23919/EuRAD65285.2025.11233845}, pages = {363 -- 366}, abstract = {This work introduces a novel concept for detecting displacements, specifically vital signs resulting from physiological activity, using noncoherent receivers. A theoretical analysis of phase noise propagation in the receiver architecture reveals that individual uncorrelated phase noise contributions add at the intermediate frequency, thereby defining the detection sensitivity. System validation using a reflector mounted on a modulator producing controlled oscillations demonstrates the ability to detect sub-millimeter displacements, provided the residual phase noise from the uncorrelated oscillators remains low. Extending this concept, the system accurately detects respiration and cardiac activity, with results is comparable to those of a reference ECG sensor. These findings open new possibilities for multistatic vital sign detection systems, offering reliable, non-contact sensing for healthcare and remote monitoring applications.}, language = {en} }