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This paper presents a highly selective integrated dielectric sensor with read-out circuit at 240 GHz in SiGe BiCMOS and back-side etching technology. The sensor features with a resonator to perform bandpass frequency response which varied in accordance to the dielectric change of the sample under test. This variation can be sensed and recorded as the change of output voltage of an integrated 240 GHz...
In this work active and passive circuit components suitable for efficient in-antenna power combining are investigated with focus on the matching impedance between the individual components. In the proposed concept, the input power is split by 1∶4 couplers with 12.5Ω output impedance, which enables a very broadband input matching of the following single-ended amplifiers. To combine the output power...
In this paper, a fractional-N phase-locked loop (PLL) with an integrated chirp generation circuit block for frequency-modulated continuous-wave (FMCW) radar systems is reported. The circuit is composed of a push-push voltage controlled oscillator (VCO), a feedback divider including pre-scaler and programmable divider stages, a phase-frequency detector followed by a current steering charge pump, a...
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