[1] Wang Debo, Liao Xiaoping, Tian Tao,. Amplitude modulation measurementof symmetrical microwave power sensor [J]. Journal of Southeast University (English Edition), 2010, 26 (1): 68-72. [doi:10.3969/j.issn.1003-7985.2010.01014]

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Amplitude modulation measurementof symmetrical microwave power sensor()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

26

Issue:

2010 1

Page:

68-72

Research Field:

Circuit and System

Publishing date:

2010-03-30

Info

Title:

Amplitude modulation measurementof symmetrical microwave power sensor

Author(s):

Wang Debo;  Liao Xiaoping;  Tian Tao

Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

amplitude modulation;  symmetrical;  power sensor;  direct current(DC)calibration

PACS:

TN402

DOI:

10.3969/j.issn.1003-7985.2010.01014

Abstract:

In order to reduce the mismatch error, a direct current(DC)calibration method is introduced when the modulated microwave signal is measured. The microwave power is input to the left section of the power sensor, and the DC power is input to the right of the power sensor. Due to the existence of parasitic loss and electromagnetic coupling, the microwave power results in a mismatch error. However, the DC power does not have the mismatch error. So the DC power applied in the right section can calibrate the mismatch error of the microwave power in the left section. The calibration factor is measured at different modulation rates and modulation depths.The measurement results show that the carrier frequency is the major factor influencing the measurement results. After calibration, the carrier frequency and the modulation rate have little effect on the output voltage. The frequency response becomes relatively flat in the frequency range up to 20 GHz, and the sensitivity on average is enhanced by about 0.12 mV/dBm. Therefore, the DC calibration method has a certain reference value for the terminal-type microwave power sensor.

References:

[1] Lamy J C. Microelectronics enhances thermocouple power measurements [J]. Hewlett Packard J, 1974, 26(1): 16-18.
[2] Dehe A, Krozer V, Chen B, et al. High-sensitivity microwave power sensor for GaAs-MMIC implementation [J]. IEEE Electronics Letters, 1996, 32(23): 2149-2150.
[3] Milanovic V, Gaitan M, Bowen E D, et al. Thermoelectric power sensor for microwave applications by commercial CMOS fabrication [J]. IEEE Electron Lett, 1997, 18(9): 450-452.
[4] Lalinsky T, Hascik S, Mozolova, Z, et al. The improved performance of GaAs micromachined power sensor micro-system [J]. Sensors and Actuators A:Physical, 1999, 76(1/2/3): 241-246.
[5] Wang Debo, Liao Xiaoping. A novel symmetrical microwave power sensor based on MEMS technology [J]. Chinese Journal of Semiconductors, 2009, 30(5): 054006-1-054006-5.
[6] Wang Jian, Cui Chen. The modulation and demodulation systems of the signal sideband on the basis of the system view emulate [J]. Communication Technology, 2003, 43(7): 43-45.(in Chinese)
[7] Quan Jingcai, Chen Qijin. Compatible signal sideband system of phase-amplitude modulation [J]. Journal of South China University of Technology: Natural Science Edition, 2002, 30(4): 37-39.(in Chinese)
[8] Bao Changxiang. Analog switch: its application in amplitude modulation and demodulation [J]. Journal of Neijiang Teachers College, 2002, 17(4): 19-23.(in Chinese)
[9] Chen Qijing. Spectrum analysis of phase amplitude modulation [J]. IEEE Trans on Broadcasting, 1990, 36(1): 34-36.
[10] Zhang Guijun, Zhou Wei, Zheng Yanqiu. Affection to phase noise of a CW carrier by the pulse modulation [J]. Journal of Astronautic Metrology and Measurement, 2003, 23(1): 17-21.(in Chinese)
[11] Zhang Wenyuan, Wang Hong, Zheng Jinbin, et al. Effects of microwave power transmission on mismatch errors and measurement accuracy [J]. Journal of Air Force Radar Academy, 2005, 19(4): 34-36.(in Chinese)
[12] Ziemer R E, Tranter W H. Principles of communications: systems, modulation and noise [M]. New York: John Wiley & Sons, 2003: 101-147.

Memo

Memo:

Biographies: Wang Debo(1983—), male, graduate; Liao Xiaoping(corresponding author), male, doctor, professor, xpliao@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.60976094), the National High Technology Research and Development Program of China(863 Program)(No.2007AA04Z328).
Citation: Wang Debo, Liao Xiaoping, Tian Tao. Amplitude modulation measurement of symmetrical microwave power sensor[J]. Journal of Southeast University(English Edition), 2010, 26(1): 68-72.

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