Design of a Microstrip Leaky-Wave Antenna for Two-Dimensional Bearing Tracking

3D radar imaging based on frequency-scanned antenna

“…As a result, the image of the target is not a round in shape, but an oval, although the resolutions in two dimensions are still identical. Generally, the geometric center of the profile is regarded as the calculated point [3,4]. From Fig.…”

“…However, in most cases the antennas in these systems are very complex, large and expensive due to the necessary phase shifters, power distribution networks or multiple transmit-receive channels [1]. Frequency-scanned antenna is a low cost and simple method to realize electronic scanning function since the beam steers with the changing of feed frequency [1,2,3,4]. Using swept frequency signal as the feed source, the main beam can scan a certain range in one dimension [1,5].…”

“…The common types of frequency-scanned antenna include waveguide leaky wave antenna, microstrip leaky wave antenna and SIW slot antenna. In [3] and [4], the microstrip leaky wave antenna achieves range and azimuth 2D imaging. As the frequency is increased from 4.25 to 8 GHz, the main beam of the antenna steers from 70°to 33°and the antenna gain is increased from 6.6 to 12.2 dB.…”