ADVANCED ELECTROMAGNETICS, VOL.8, NO. 3, SEPTEMBER 2019 An Accurate and Compact High Power Monocycle Pulse Transmitter for Microwave Ultra-Wideband Radar Sensors with an enhanced SRD model: Applications for Distance Measurement for lossy Materiel Younes AHAJJAM1;3, Otman AGHZOUT1;2, Jose` M. CATALA-CIVERA3, Felipe PENARANDA-FOIX˜ 3, and Abdellah DRIOUACH1 1 Dept. of Physics, Faculty of Science, Abdelmalek Essaadi University, Tetouan, Morocco. 2 Department of Telecommunication, ENSA. LabSIT-FS, UAE Univertisy, Tetouan, Morocco 3 Instituto ITACA. Universitat Politecnica` de Valencia.` Camino de Vera s/n. 46022 Valencia, Espana.˜ *corresponding author, E-mail:
[email protected] Abstract and high penetration capability. Instead of higher frequen- cies, which the losses are enormous, Lower frequencies up In This paper, a high power sub-nanosecond pulse trans- to 3.5 GHz are preferred for the application radar in lossy mitter for Ultra-wideband radar sensor is presented. The material. The corresponding pulse width of the generated backbone of the generator is considered as a step recov- baseband pulses is approximately 200 ps. There are vari- ery diode and unique pulse injected into the circuit, which ous techniques to generate UWB pulses around this range. gives rise to an ultra-wideband Gaussian pulse. The tran- The basis of a classical UWB short pulse generator is a sistor driver and transmission line pulse forming the whole driver, a pulse sharpener and a pulse forming network. The network are investigated in detail. The main purpose of this driver converts the step-like waveform in Gaussian pulses, work is to transform a square waveform signal to a driv- and the pulse sharpener converts slow rise time waveform ing pulse with the timing and the amplitude parameters re- edge to a faster one.