Generation of precise frequency ramps for FSCW applications with a fractional-N-PLL at 24 GHz
Stelzer A, Höftberger J, Ettinger K, Weigel R (2003)
Publication Type: Conference contribution
Publication year: 2003
Publisher: IEEE
Pages Range: 1199-1202
Conference Proceedings Title: 33rd European Microwave Conference
Event location: Munich, Germany
Abstract
For industrial microwave sensors operating in continuous wave (CW) mode in general an adequate frequency modulation is required. A common modulation scheme for distance sensors is frequency stepping (FS). In this paper we present a fast and highly accurate stepped ramp generator based on an integrated 24-GHz Silicon Germanium (SiGe) oscillator with fractional-N-PLL stabilization and modulation. Fast and accurate frequency steps are a prerequisite for achieving a good sensor performance. The dynamic behavior is verified by a phase and frequency evaluation of the ramp signal. Frequency overshoot typical for large frequency steps is reduced by a compensation technique in the PLL control signal of the ramp generator and is demonstrated by 100-MHz steps at 24.5 GHz.
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APA:
Stelzer, A., Höftberger, J., Ettinger, K., & Weigel, R. (2003). Generation of precise frequency ramps for FSCW applications with a fractional-N-PLL at 24 GHz. In 33rd European Microwave Conference (pp. 1199-1202). Munich, Germany: IEEE.
MLA:
Stelzer, Andreas, et al. "Generation of precise frequency ramps for FSCW applications with a fractional-N-PLL at 24 GHz." Proceedings of the 33rd European Microwave Conference, Munich, Germany IEEE, 2003. 1199-1202.
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