Fractional-N PLL Synthesizer for FMCW Signal Generator with Dual-Mode Modulation Pattern
Radar signal generator is a critical component in radar system as it determines the best achievable resolution. Single chip Fractional-N PLL synthesizer with built-in VCO and sweep modulator become more popular as Frequency Modulated Continuous Wave (FMCW) signal generator due to the simplicity and overall cost reduction. This paper presents a realization process and experimental result of dual-mode modulation pattern FMCW signal generator using HMC769LP6CE PLL. The PLL is controlled by ATMega328 microcontroller and Altera EPM240T100C5 CPLD to operate in two difference mode: 1-way sweep mode and 2-way sweep mode. The PLL is programmed with four different sweep bandwidth from 6.75–54 MHz for different range and resolution radar purpose. The performance of FMCW signal generator is measured using the output of passband signal spectrum. The experimental results indicate that the PLL-VCO with 2-way sweep mode has clearer frequency passband compared to 1-way sweep mode.
R. Undheim, “Design of a linear fmcw radar synthesizer with focus on phase noise,” M.S. Thesis, Norwegian University of Science and Technology, Trondheim, Norwegia, 2012.
K. V. Puglia, “Technical memorandum: FMCW radar primer,” M/A-COM GmbH, Schweinfurt, Germany, August 1995.
Y. Zhu, H. Zhang and W. Hong, "A frequency agile synthesizer using DDS and PLL techniques for FMCW radar," in Proc. 2015 Asia-Pacific Microwave Conf., Nanjing, 2015, pp. 1-3. Crossref
T. Jaeschke, C. Bredendiek, M. Vogt, and N. Pohl, “Fractional-N PLL based FMCW sweep generator for an 80 GHz radar system with 24.5 GHz bandwidth,” Adv. Radio Sci., no. 10, pp. 7–11, 2012. Crossref
I. M. Milosavljević, Ɖ. P. Glavonjić, D. P. Krčum, L. Saranovac, V. M. Milovanović, “A highly linear and fully-integrated FMCW synthesizer for 60 GHz radar applications with 7 GHz bandwidth”, Analog Integrated Circuits Signal Processing, vol. 90, no. 3, pp. 591-604, 2016. Crossref
R. I. Wijaya, P. Adhi, A. Y. Hercuadi, D. Muliawandana, R. Sariningrum, “Radar penembus dinding UWB-FMCW 500-3000 MHz,” Jurnal Elektronika dan Telekomunikasi, vol. 14, no. 1, pp. 1-7, 2014. Crossref
H. J. Ng, A. Fischer, R. Feger, R. Stuhlberger, L. Maurer, A. Stelzer, “A DLL-supported, low phase noise fractional-N PLL with a wideband VCO and a highly linear frequency ramp generator for FMCW radars,” IEEE Transactions Circuits Syst. I, vol. 60, n0. 12, pp. 3289-3302, 2013. Crossref
L. K. Patton, “A GNU radio based software-defined radar,” M. S. Thesis, Wright State Univ., Ohio, USA, 2007.
Software Defined Radio: Architectures, Systems and Functions 1st ed. Wiley & Sons, Inc., New Jersey, USA, 2003.
Du, Q. (2000). Delta-sigma fractional-n synthesizers enable low-cost, low-power, frequency-agile software radio. [Online] Available: http://www.eetimes.com. [Accessed: Feb. 12, 2016].
Skyworks. (2005). White paper basics of dual fractional-n synthesizers/plls. [Online] Available: http://www.skyworksinc.com/uploads/documents/101463B.pdf. [Accessed: Dec. 18, 2016].
Texas Instruments. (1999). Fractional/Integer-N PLL . [Online] Available: http://www.ti.com/lit/an/swra029/swra029.pdf. [Accessed: Mar. 20, 2016].
Hittite Microwave. (2015). HMC769LP6C Fractional-N PLL with integrated VCO, 9.05-10.15 GHz. [Online] Available: http://www.analog.com/media/en/technical-documentation/data-sheets/hmc769.pdf. [Accessed: Feb. 12, 2016].
Hittite Microwave. (2015). PLLs with integrated VCO-Microwave application product & operating guide, HMC769LP6C operating guide. [Online] Available: http://www.analog.com/media/en/technical-documentation/data-sheets/hmc769.pdf. [Accessed: Feb. 12, 2016].
Metrics powered by PLOS ALM
- There are currently no refbacks.
Copyright (c) 2018 National Research and Innovation Agency
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.