Title :
An IQ-modulator based heterodyne 77-GHz FMCW radar
Author :
Feger, Reinhard ; Wagner, Christoph ; Stelzer, Andreas
Author_Institution :
Christian Doppler Lab. for Integrated Radarsensors, Johannes Kepler Univ., Linz, Austria
Abstract :
In this paper a method to realize a heterodyne frequency-modulated continuous-wave (FMCW) radar is presented. The system operates at a frequency of 77 GHz and is based on an in-phase quadrature-phase (IQ) modulator in the transmit (TX)-path of the system. This IQ modulator is used as a single-sideband mixer, which allows the realization of an offset frequency between the radar´s TX and receive signal. In this way it is possible to shift the frequency band containing the target information away from dc, which simplifies FMCW range measurement of targets close to the radar.
Keywords :
CW radar; FM radar; modulators; phase modulation; IQ modulator; frequency 77 GHz; heterodyne FMCW radar; heterodyne frequency modulated continuous wave radar; inphase quadrature phase modulator; range measurement; transmit path; Frequency measurement; Frequency modulation; Mixers; Position measurement; Radar measurements; FM radar; millimeter wave radar; radar distance measurement;
Conference_Titel :
Microwave Conference (GeMIC), 2011 German
Conference_Location :
Darmstadt
Print_ISBN :
978-1-4244-9225-1
Electronic_ISBN :
978-3-9812668-3-2
