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This paper presents a 64-84-GHz phase-locked loop (PLL) realized in a low-cost 80-GHz HBT technology. The circuit consists of a wide tuning-range voltage-controlled oscillator, a push-push frequency doubler, a divide-by-32 frequency divider, a phase detector and an active loop filter. The measured phase noise at 1-MHz offset is 106 dBc/Hz. The output power is 2.5 dBm at 64 GHz, and it slowly decreases to 8.1 dBm at 84 GHz, with a maximum dc power consumption of 517 mW. To the authors' knowledge, the circuit achieves the widest frequency tuning range and its in-band phase noise is the lowest among the fully integrated-band PLLs reported to date. Index Terms-Heterojunction bipolar transistors (HBTs), millimeter-wave (mm-wave) integrated circuits (ICs), phase-locked loops (PLLs).

Abstract-A short range 3.1 -10.6 GHz single band ultrawideband (UWB) pulse radar system is presented. The transmitter consists of a pulse generator that is connected to a broadband monopole antenna. The generated pulse shape is similar to the fifth derivative of the Gaussian bell shape and makes efficient use of the allocated FCC UWB frequency mask. The receiver is realized with a single-ended low noise amplifier and active single-ended to differential converters that drive the input ports of an analog correlator which uses pulse sequences as template signals. Measurements show a resolution capability of the radar system in the millimeter range. All active circuits have been realized in a low cost 0.8 µm SiGe HBT technology.

This paper presents the design and characterization of an ultra wideband FMCW radar sensor. The radar frontend consists of transmitter and receiver chips in SiGe BiCMOS technology with on-chip antennas. Both chips share the same reference chirp signal, multiplied 8 times to the desired operation band. The radar frontend demonstrates a bandwidth of 56.8 GHz from 104.4 GHz to 161.2 GHz, which corresponds to a theoretical range resolution of 2.6mm. The on-chip antenna occupies only 1.2 X 0.9mm 2 without any post-micromachining and exhibits a measured gain above 4 dBi for more than 28 GHz of bandwidth. The sensor covers a bandwidth from 105 to 160 GHz with about 10 dB Tx-to-Rx gain fluctuation and less than 39 dBc harmonic power. The radar sensor was tested with FMCW chirps for different scenarios, showing a range resolution of approximately 5 mm.

Abstract-In this paper the hybrid integration of an FCC-compliant fifth-order Gaussian derivative impulse generator IC together with a compact ultra-wideband Vivaldi antenna is presented. The setup results in a compact FCC-compliant impulse UWB transmitter. Measurements of the impulse shape in time and spectral domain are shown. With this transmitter a movement detection and the precise measurement of the movement deviation value by a correlation measurement technique is presented. This shows the ability of the UWB radar system to operate as a movement detection sensor. The measurements include a breath rate measurement of a human being.