Browse > Article
http://dx.doi.org/10.5515/KJKIEES.2011.22.2.182

The Phase Difference Measurement Module Development for Amplitude Modulated Range Measurement System  

Noh, Hyoung-Woo (School of Electrical Engineering and Computer Science, Kyungpook National University)
Park, Jeong-Ho (School of Electrical Engineering and Computer Science, Kyungpook National University)
Kang, Il-Heung (School of Electrical Engineering and Computer Science, Kyungpook National University)
Choi, Mun-Gak (School of Electrical Engineering and Computer Science, Kyungpook National University)
Kim, Kang-Wook (School of Electrical Engineering and Computer Science, Kyungpook National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.2, 2011 , pp. 182-190 More about this Journal
Abstract
A amplitude modulation(AM) range measuring system utilizes the phase difference of the modulated envelope of the reflected signal to measure the distance. It is known that the AM system has a problem in accuracy due to antenna leakage signals and spurious reflection signals, but an AM range measurement system using an active reflector, which shifts the frequency bands, has been proposed in order to minimize the measurement errors due to spurious signals. In this paper, a new phase measurement module for the AM range measurement system, which enables to measure long distance with good accuracy, is proposed. The modulation frequency is alternatively selected between 8 and 1 MHz, and the measured distance range with this module is up to 150 m within 2 cm accuracy. A JK flip-flop circuit is used for higher phase accuracy, and an XOR circuit is used to cover long distance.
Keywords
Phase Difference; Range Measurement; Amplitude Modulated(AM); Phase Detector;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 이상성, 레이더 공학, 보성문화사, pp 17-18, 1999년.
2 이엠와이즈통신(주), "폭변조 레이더 및 그 거리 측정 방법", Korea patent-pending #102009-0052-512, 2009년.
3 방송통신위원회 고시, 제 2008-136호, "대한민국 주파수 분배표", 2008년.
4 Ole K. Nilsen, W. D. Boyer, "Amplitude modulated CW radar", IRE Transactions on Aeronautical and Navigational Electronics, pp. 50-254, 1962.
5 최문각, 우동식, 강일흥, 노형우, 김강욱, "거리 측정 정확도를 개선한 AM 레이더 모듈 설계", 한국전자파학회논문지, 21(8), pp. 911-919, 2010년.   과학기술학회마을   DOI
6 노형우, 최문각, 박정호, 강일흥, 김강욱, "능동반사기를 이용한 진폭 변조 방식의 거리 측정시스템 개발", 한국전자파학회 마이크로파 및 전파전파 학술대회, p. 170, 2010년.
7 U. L. Rohde, Microwave and Wireless Synthesizers, Wiley, pp. 1-75, 1997.
8 Behzad Razavi, Design of Analog CMOS Integrated Circuits, McGraw-Hill, pp. 532-576, 2000.