Design of Dual-Mode Local Oscillators Using CMOS Technology for Motion Detection Sensors

Recently, studies have been actively carried out to implement motion detecting sensors by applying radar techniques. Doppler radar or frequency-modulated continuous wave (FMCW) radar are mainly used, but each type has drawbacks. In Doppler radar, no signal is detected when the movement is stopped. Also, FMCW radar cannot function when the detection object is near the sensor. Therefore, by implementing a single continuous wave (CW) radar for operating in dual-mode, the disadvantages in each mode can be compensated for. In this paper, a dual mode local oscillator (LO) is proposed that makes a CW radar operate as a Doppler or FMCW radar. To make the dual-mode LO, a method that controls the division ratio of the phase locked loop (PLL) is used. To support both radar mode easily, the proposed LO is implemented by adding a frequency sweep generator (FSG) block to a fractional-N PLL. The operation mode of the LO is determined by according to whether this block is operating or not. Since most radar sensors are used in conjunction with microcontroller units (MCUs), the proposed architecture is capable of dual-mode operation by changing only the input control code. In addition, all components such as VCO, LDO, and loop filter are integrated into the chip, so complexity and interface issues can be solved when implementing radar sensors. Thus, the proposed dual-mode LO is suitable as a radar sensor.

[1]  Juergen Hasch,et al.  FMCW ramp non-linearity effects and measurement technique for cooperative radar , 2015, 2015 European Microwave Conference (EuMC).

[2]  Yan Zhang,et al.  Radar Constant-Modulus Waveform Design with Prior Information of the Extended Target and Clutter , 2016, Sensors.

[3]  Donghyun Baek,et al.  A Spread Spectrum Clock Generator Using a Programmable Linear Frequency Modulator for Multipurpose Electronic Devices , 2015, IEEE Transactions on Electromagnetic Compatibility.

[4]  Pietro Andreani,et al.  A Push–Pull Class-C CMOS VCO , 2013, IEEE Journal of Solid-State Circuits.

[5]  Toshiya Mitomo,et al.  A 77 GHz 90 nm CMOS transceiver for FMCW radar applications , 2009, 2009 Symposium on VLSI Circuits.

[6]  Sen Wang,et al.  Design of $X$ -Band RF CMOS Transceiver for FMCW Monopulse Radar , 2009, IEEE Transactions on Microwave Theory and Techniques.

[7]  Jeong-Geun Kim,et al.  76–81-GHz CMOS Transmitter With a Phase-Locked-Loop-Based Multichirp Modulator for Automotive Radar , 2015, IEEE Transactions on Microwave Theory and Techniques.

[8]  Debashis Dhar,et al.  Modeling and analysis of the effects of PLL phase noise on FMCW radar performance , 2017, 2017 IEEE International Symposium on Circuits and Systems (ISCAS).

[9]  Songcheol Hong,et al.  A Compact Ka-Band Doppler Radar Sensor for Remote Human Vital Signal Detection , 2012 .

[10]  Yong-Zhong Xiong,et al.  A Fully Integrated X-Band Phased-Array Transceiver in 0.13-$\mu{\hbox{m}}$ SiGe BiCMOS Technology , 2016, IEEE Transactions on Microwave Theory and Techniques.

[11]  Feng Zhao,et al.  An X-Band Radar Transceiver MMIC with Bandwidth Reduction in 0.13 µm SiGe Technology , 2014, IEEE Journal of Solid-State Circuits.

[12]  S.S. Peng,et al.  Effects of transmitter phase noise on millimeter wave LFMCW radar performance , 2008, 2008 International Conference on Microwave and Millimeter Wave Technology.

[13]  Antonio Moccia,et al.  Preliminary Study of a Millimeter Wave FMCW InSAR for UAS Indoor Navigation , 2015, Sensors.

[14]  Changzhan Gu,et al.  A Hybrid FMCW-Interferometry Radar for Indoor Precise Positioning and Versatile Life Activity Monitoring , 2014, IEEE Transactions on Microwave Theory and Techniques.

[15]  Songcheol Hong,et al.  A 24-GHz CMOS UWB Radar Transmitter With Compressed Pulses , 2012, IEEE Transactions on Microwave Theory and Techniques.

[16]  Changzhi Li,et al.  A Portable FMCW Interferometry Radar With Programmable Low-IF Architecture for Localization, ISAR Imaging, and Vital Sign Tracking , 2017, IEEE Transactions on Microwave Theory and Techniques.

[17]  Chenglin Cui,et al.  A Low-Phase-Noise 77-GHz FMCW Radar Transmitter With a 12.8-GHz PLL and a $\times$6 Frequency Multiplier , 2016, IEEE Microwave and Wireless Components Letters.

[18]  Zhao Li,et al.  Detection of Multiple Stationary Humans Using UWB MIMO Radar , 2016, Sensors.

[19]  Hugh Griffiths,et al.  New ideas in FM radar , 1990 .

[20]  Jaeha Kim,et al.  13.1 A 940MHz-bandwidth 28.8µs-period 8.9GHz chirp frequency synthesizer PLL in 65nm CMOS for X-band FMCW radar applications , 2016, 2016 IEEE International Solid-State Circuits Conference (ISSCC).

[21]  Jeong-Geun Kim,et al.  Transformer-Based Current-Reuse Armstrong and Armstrong–Colpitts VCOs , 2014, IEEE Transactions on Circuits and Systems II: Express Briefs.

[22]  Seong-Ook Park,et al.  A DDS and PLL-based X-band FMCW radar system , 2011, 2011 IEEE MTT-S International Microwave Workshop Series on Intelligent Radio for Future Personal Terminals.

[23]  Songcheol Hong,et al.  A 79-GHz Adaptive-Gain and Low-Noise UWB Radar Receiver Front-End in 65-nm CMOS , 2016, IEEE Transactions on Microwave Theory and Techniques.

[24]  Kenichi Okada,et al.  Class-C VCO With Amplitude Feedback Loop for Robust Start-Up and Enhanced Oscillation Swing , 2013, IEEE Journal of Solid-State Circuits.

[25]  David Johnson,et al.  Radar Sensing for Intelligent Vehicles in Urban Environments , 2015, Sensors.

[26]  Songcheol Hong,et al.  Single-Antenna FMCW Radar CMOS Transceiver IC , 2017, IEEE Transactions on Microwave Theory and Techniques.

[27]  D. R. Jahagirdar.  A high dynamic range miniature DDS-based FMCW radar , 2012, 2012 IEEE Radar Conference.

[28]  Sungho Lee,et al.  A CMOS X-band FMCW generator IC for radar applications , 2017, 2017 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).

[29]  Giampaolo Ferraioli,et al.  A New Methodology for 3D Target Detection in Automotive Radar Applications , 2016, Sensors.

[30]  Libo Huang,et al.  Simulation of the effect of signal source's phase noise on millimeter wave automotive radar system based on SystemVue , 2016, 2016 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM).

[31]  Jeong-Yun Lee,et al.  A dual-mode signal generator using PLL for X-band radar sensor applications , 2017, 2017 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT).

[32]  Donghyun Baek,et al.  $G_{m}$ -Boosted Complementary Current-Reuse Colpitts VCO With Low Power and Low Phase Noise , 2014, IEEE Microwave and Wireless Components Letters.

[33]  A. Stelzer,et al.  High-Speed FMCW Radar Frequency Synthesizer With DDS Based Linearization , 2007, IEEE Microwave and Wireless Components Letters.

[34]  Martin Vossiek,et al.  Noise in Homodyne FMCW radar systems and its effects on ranging precision , 2013, 2013 IEEE MTT-S International Microwave Symposium Digest (MTT).

[35]  Gabor C. Temes,et al.  Understanding Delta-Sigma Data Converters , 2004 .

[36]  Songcheol Hong,et al.  Wireless Cooperative Synchronization of Coherent UWB MIMO Radar , 2014, IEEE Transactions on Microwave Theory and Techniques.

[37]  Klaus Aufinger,et al.  A SiGe Fractional- ${ N}$ Frequency Synthesizer for mm-Wave Wideband FMCW Radar Transceivers , 2016, IEEE Transactions on Microwave Theory and Techniques.