Transmitter and receiver design at L-band and X-band for FM-CW radar altimeter

Ashish Kumar Roy, Bakul Bapat, Chinmoy Bhattacharya, Shashikala A Gangal


In recent years, there has been a growing interest in FM-CW (frequency modulated continuous wave) technology for military and civilian applications. FM-CW radar altimeters find applications to detect ground proximity during automatic landing in low-visibility condition, collision avoidance systems in vehicles, and ground penetrating radars for buried object detections such as landmines, pipelines, etc. The development of a low-power L-band and X-band FM-CW radar hardware and design of a third order loop filter for the phase locked loop (PLL) is the main focus of this paper. Results of laboratory trial for the calibration of FMCW radar hardware are presented to demonstrate the feasibility of operation at X band


FMCW; DDS; PLL-VCO; Phase noise; Loop Filter

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Rohling, ”Waveform design principles for automotive radar systems”, M CIE International Conference, October 2011.

K. W. Chang, H. Wang, ”Forward-looking automotive radar using a W-band single-chip transceiver,” IEEE Trans Microwave Theory Tech.vol. 43.

Yanfei Mao, ”FM-CW radar receiver front-end design”, Master's thesis, Delft University of Technology.

L. Kuang, Y. J. Pan, X. F. Shen, and J. Y. Huang, " A new algorithm for long range FMCW radar altimeter ", International Conference on Signal and Information Processing (ChinaSIP), 6-10 July, 2013.

Bu-Chin Wang, “Digital image processing techniques and applications in radar image processing”, John Wiley & sons, inc., publication, 2008.

F. M. Gardner, “Phase lock Techniques”, Wiley publications, third edition, 2005.

Giovanni Bianchi, ”Phase locked loop synthesizer simulation”, Mc-Graw Hill publications.

James A. Crawford, "Advanced phase-lock techniques”, Artech House Inc. 2008.

Y.C.Chen, ”Loop Filter Design for Third-order Charge –Pump PLL Using Linearized Discrete-Time Model”, IEEE international conference on control applications, 2010.

B. K. Mishra, “Behavior and Mathematical Modeling of PLL at 450MHz,” 2nd International Conference and workshop on Emerging Trends in Technology.

Mark A.Wickert, “Phase-Locked Loops with Applications”, Lecture Notes Spring 2011.

Jyoti P.Patra, “Behavioral Modeling and Simulation of PLL Based Integer N Frequency Synthesizer using Simulink.”, International Journal of Electronics and Communication Engineering, Volume 5.



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