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Microwave Radar for Non-Destructive Express Testing of Electrical Properties of Semiconductor Materials

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Microwave radar for non-destructive express testing of electrical properties of semiconductor materials which consists of pulsed magnet, transmitting and receiving antennas, high frequency generator, pulsed modulator and digital oscilloscope is described. In semiconductor specimen placed in pulsed magnetic field a magnetoplasmic wave is excited and propagated through the specimen. Delay time and attenuation of transmitted and reference signals are measured to find a value of concentration and mobility of free charge carriers in semiconductors. Experimental data of testing of InSb, n-InSb specimens are presented and acceptable for express testing correspondence of results was achieved.
  • Laboratory of High Magnetic Fields, Vilnius Gediminas Technical University, Naugarduko str. 41, ZP03227, Vilnius, Lithuania
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