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

• Published in: 2016 5th International Conference on Multimedia Computing and Systems (ICMCS) pp. 497 - 501
• Main Authors: Ahajjam, Younes, Aghzout, Otman, Catala-Civera, Jose M., Penaranda-Foix, Felipe, Driouach, Abdellah
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-09-2016
• Subjects: Discharges (electric); Integrated circuit modeling; Microstrip; Microwave circuits; Pulse; Pulse generation; Radar; SRD; Transistors; Ultra Wideband; Ultra wideband radar
• ISSN: 2472-7652
• DOI: 10.1109/ICMCS.2016.7905602

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.