Learn More
A DDS and PLL-based FMCW range meter system is described. The DDS is used as a reference clock of a linearly frequency modulated signal source, and the PLL is controlled by it. The bandwidth and the sweep time of the FMCW radar system are 150 MHz, and 270 us. Zero-padding and spectral centroid processing techniques are used to measure a target range, and(More)
In this paper, Doppler radar system is designed, which is composed of oscillator, mixer, LNA, and antennas. The idea of this paper is using reverse circular polarization for bio-detection Doppler radar to selectively receive signals reflected from highly conductive body surfaces. To improve isolation property between transmitter and receiver, we use the(More)
  • 1