High T/R isolation and phase-noise suppression in millimeter wave FMCW radars
Abstract
We present a phase noise analysis on a frequency-modulated continuous-wave (FMCW) radars at millimeter wavelengths to achieve a transmit power up to 1 Watt. To attain high transmit power, we describe a FMCW radar design that satisfy two characteristics. First, high transmit/receive (T/R) isolation better than 80 dB, obtained through a quasioptical duplexing method and high directivity horns. Second, a 'feedforward' circuit architecture that cancels the phase noise to a high degree. We will also present the measurements and simulations results of the T/R isolation and phase noise cancelation measurements using a W-band FMCW radar prototype for a planetary science application. © 2017 IEEE.
Keywords
Continuous wave radar
Frequency modulation
Millimeter waves
Radar
Radar measurement
Radar systems
Terahertz waves
Circuit architectures
Frequency modulated continuous wave radars
High-directivity
Millimeter wavelength
Phase noise analysis
Phase noise suppression
Planetary science
Quasioptical duplexing
Phase noise