Abstract
In this paper, a high power UWB monocycle generator for Non-Destructive Microwave Radar-Sensor detection is presented. The full radar system is compound with a designed UWB generator, two commercial antennas, and an oscilloscope as a receptor. The generator is composed of three essential parts-circuits, an avalanche transistor, an SRD pulse sharping and an MFN. The main idea in this work is to convert the square waveform to a driving pulse with the parameters required by the SRD pulse sharpening to obtain an output Gaussian pulse. This output pulse is converted then into a monocycle pulse. As we know, for a good range radar measurement, a high amplitude of pulse with a minimum ringing is indispensable, especially when the measurements requires many accuracies. In order to increase the pulse of the transmitter, a useful technique has been introduced; this technique consists of making the discharge path as short as possible. The applicant technique leads also to minimize the ringing in the output pulse. The measurements had been carrying out in an anechoic chamber, with the distance between 50 and 270 cm. Good Agreements between the measured and calculated results are achieved, therefore, this system can be considered very attractive in many application fields.
Highlights
Nowadays, there are many techniques that are used as non-destructive inspection including seismic [1,2], gravity [3,4] and electromagnetic methods [5,6]
An electromagnetic technique in term of non-destructive methods is presented. This method consists of a designed UWB radar sensor system having high measurements accuracy
In order to eliminate the ringing in the output pulse waveform, a useful technique has been used
Summary
There are many techniques that are used as non-destructive inspection including seismic [1,2], gravity [3,4] and electromagnetic methods [5,6]. These systems present many advantages; high precision, low power consumption, and wide-bandwidth characteristics To fulfill this task, a simple technique and useful solution have been used to improve the output pulse of radar. Unlike the generator described by Zhong and Protiva [11,12], our pulse transmitter has the advantage of producing pulses with low ringing levels and reasonably high output amplitude These two advantages are effective in order to satisfy completely the requirement headed for getting a system having the most accurate measurement pattern. An electromagnetic technique in term of non-destructive methods is presented This method consists of a designed UWB radar sensor system having high measurements accuracy. Demonstration that good agreement between the measured and calculated result is achieved will be given
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