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http://dx.doi.org/10.6109/jkiice.2011.15.3.528

Compact Range Detection Sensor by Oscillation Frequency Deviation of an Active Antenna  

Yun, Gi-Ho (성결대학교 정보통신공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.15, no.3, 2011 , pp. 528-535 More about this Journal
Abstract
In this paper, a compact doppler sensor with oscillator type active antenna operating at 2.4GHz frequency band is proposed to measure the distance to a moving object. The oscillation frequency is shifted depending on approaching of the object, and a detection circuit discriminates the frequency deviation. The active antenna has been designed and simulated. The prototype fabricated has a small circular disk type of diameter 30mm and height 4.2mm. As for antenna performance, broadside radiation pattern with beamwidth of $120^{\circ}$ and oscillation frequency of 2.35GHz has been measured. Test results as a range sensor shows that signal voltage of about 240mV has been obtained for conducting plate moving 1 meter away from the sensor. And, signal voltage has been linearly increased to the ground from 5m height by free-falling the sensor.
Keywords
Doppler sensor; Active Antenna; Oscillator; Frequency Deviation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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