Title :
A 77-GHz FM/CW radar front-end with a low-profile low-loss printed antenna
Author :
Menzel, Wolfgang ; Pilz, Dietmar ; Leberer, Ralf
Author_Institution :
Microwave Tech. Dept., Ulm Univ., Germany
fDate :
12/1/1999 12:00:00 AM
Abstract :
Design and results of a 77-GHz frequency-modulation/continuous-wave radar sensor based on a simple waveguide circuitry and a novel type of printed, low-profile, and low-loss antenna are presented. A Gunn voltage-controlled oscillator and a finline mixer act as transmitter and receiver, respectively, connected by two E-plane couplers. The folded reflector-type antenna consists of a printed slot array and another planar substrate, which, at the same time, provides twisting of the polarization and focusing of the incident wave. The performance of the radar is described, together with the initial results of a scanning of the antenna beam
Keywords :
CW radar; FM radar; Gunn oscillators; fin line components; microstrip antenna arrays; millimetre wave antenna arrays; millimetre wave receivers; reflector antennas; road vehicle radar; slot antenna arrays; voltage-controlled oscillators; waveguide couplers; 77 GHz; E-plane couplers; FM/CW radar front-end; Gunn voltage-controlled oscillator; antenna beam scanning; finline mixer; focusing; folded reflector-type antenna; low-loss antenna; low-profile printed antenna; planar substrate; polarisation twisting; printed slot array; waveguide circuitry; Circuits; Couplers; Finline; Frequency; Gunn devices; Radar antennas; Reflector antennas; Slot antennas; Transmitters; Voltage-controlled oscillators;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
