3 research outputs found
DUAL FREQUENCY CONTINUOUS WAVE RADAR FOR SMALL DISPLACEMENT DETECTION
Get PDFMany studies have been developing RADAR for small displacement detection
including Synthetic Aperture RADAR (SAR) to detect the landslide, where a wide
bandwidth is commonly used. This thesis propose a small displacement detection
by using Continuous Wave (CW) RADAR. CW RADAR with its narrow bandwidth
feature, make system realization become more simple compared to the system using
a wide bandwidth.
CW RADAR can only detect the velocity of a dynamic target. Then, it underlie this thesis to modify the CW RADAR system by using dual frequency. This
dual frequency, helps the system to recognize the displacement of a static target by
processing its phase component on the echo signal.
This thesis performs a computer simulation by MATLAB and an experiment
by HB100 motion sensor. The computer simulation result shows that the proposed
RADAR is capable to detect a small displacement in milimeter scale. It simulated
-3.5625 mm until 3.5625 mm of displacement with three value of bandwidth. The
narrowest bandwidth that can be simulated is 0.3 MHz. In the experiment result,
the bandwidth is set to 0.87 MHz. Then, it needs some improvement in order to
make the result better.
Keywords: continuous wave (CW) RADAR, small displacement, phase shift
Dual Frequency Continuous Wave Radar for Small Displacement Detection
Get PDFIn several field such as structure health monitoring, landslide monitoring and medical measurement, small displacement is used as the indicator of any problem that may rise in such fields. High resolution radar system is required for small displacement detection in millimeter of centimeter scale. Continuous wave (CW) radar with its narrow bandwidth feature, has a simpler system comparing with other radar system. However, the modification is needed to present the ability of CW radar in detecting small displacement. In this paper, dual frequency CW radar was investigated and proposed for small displacement detection. Computer simulation has been conducted to study the capability of the proposed radar system. The result shows that the dual frequency CW radar at 10.525 GHz is capable to detect a small displacement in millimeter scale. The frequency difference of the radar signal needs to be adjusted to avoid the ambiguity in the detection resul
