A compact UWB sub-nanosecond pulse generator for microwave radar sensor with ringing miniaturization

This paper presents a compact ultra-wideband (UWB) microwave radar transmitter. The developed design presents low-power and low-cost ultra-short pulse with a minimum of the ringing in the output waveform. Ultra-short pulse has been generated by avalanche pulse generator and sharpened with a step recovery diode (SRD). In order to improve the simulation response and to increase the rise-time of the pulses, a new model of a step recovery diode (SRD) was used as a sharpener circuit. Making the discharge path as short as possible, a minimum of the ringing has been obtained in the output pulse, around 3,6% in overshoot. Compact pulse generator circuit structure is completely fabricated using low-cost microstrip technology characteristic. The measurement results present generator Gaussian wave form pulses over 6.4 V in amplitude and 440 fall time at 100 KHz. Good Agreements between the measured and calculated result are achieved.

[1]  T. Scullion,et al.  New uniplanar subnanosecond monocycle pulse generator and transformer for time-domain microwave applications , 2001 .

[2]  R. Adde,et al.  Large amplitude picosecond step generation with FETs , 1990 .

[3]  K. Kaemarungsi,et al.  Edge-triggered driver circuit for ultra-wideband pulse generator with cascode impulse shaping , 2012, 2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology.

[4]  Debra McKeown,et al.  Ultra-Wideband Radio Technology: Siwiak/Ultra-Wideband , 2005 .

[5]  Yu Guo,et al.  A novel design and implementation of sub-nanosecond sampling pulse generator for ultra-wideband equivalent sampling receiver , 2014, Fifth International Conference on Computing, Communications and Networking Technologies (ICCCNT).

[6]  G. Kompa,et al.  Ultra-fast Pulse Transmitter for UWB Microwave Radar , 2006, 2006 European Microwave Conference.

[7]  Debra McKeown,et al.  Ultra-wideband Radio Technology , 2004 .

[8]  Jianming Zhou,et al.  A new CAD model of step recovery diode and generation of UWB signals , 2006, IEICE Electron. Express.

[9]  Fei Yuan-chun,et al.  A new CAD model of step recovery diode and generation of UWB signals , 2006 .

[10]  J. Machac,et al.  High power monocycle pulse generator for through-the-wall radar transmitter , 2009, 2009 Asia Pacific Microwave Conference.

[11]  Thomas Musch,et al.  Generation of short electrical pulses based on bipolar transistorsny , 2005 .

[12]  Tzyh-Ghuang Ma,et al.  Ultrawideband monocycle pulse generator with dual resistive loaded shunt stubs , 2007 .

[13]  Zhong Li,et al.  An ultra-wideband monocycle pulse generator with good performance , 2011, 2011 International Conference on Computational Problem-Solving (ICCP).

[14]  Felipe L. Peñaranda-Foix,et al.  Bibliography, Background and Overview of UWB radar sensor , 2014 .

[15]  E. Miller.  Time-domain measurements in electromagnetics , 1986 .

[16]  James D. Taylor.  Ultra-wideband Radar Technology , 2000 .