A long-range FMCW
radar with a
narrow beam width is realized with a self-developed technology, which is not only used for
traffic flow detection, but also for detecting target presence, measuring static target distance and collecting environmental object distribution images, and achieving low-cost and high-performance comprehensive goals. The
radar is composed of a
microwave front end, an
intermediate frequency analog circuit module, and a
digital signal processor, and uses a stepped linear
frequency modulation continuous wave system. The
microwave front end comprises a transmitting antenna and a receiving antenna that have blade beams, and a
microwave transmitting and receiving circuit with a power
amplifier. In design schemes of the antenna, the receiving and transmitting circuit, an
intermediate frequency analog circuit and a
radar system, a number of independently created technologies are used, comprising the design of an antenna with minimized discontinuities, the design of a non-equal splitter and a
high impedance mixer circuit, an excellent stepped
linear modulation signal generator, a new radar time base synchronization method, the optimal bandwidth design for a radar
channel filter. A theoretical argument in accordance with the physical sources is given for the stepped linear frequency modulated radar technology, which guarantees a reliable basis for the given design.