Abstract
This paper presents a high-performance low-ringing ultra-wideband monocycle picosecond pulse generator, formed using a step recovery diode (SRD), simulated in ADS software and generated through experimentation. The pulse generator comprises three parts, a step recovery diode, a field-effect transistor and a Schottky diode, used to eliminate the positive and negative ringing of pulse. Simulated results validate the design. Measured results indicate an output waveform of 1.88 peak-to-peak amplitude and 307ps pulse duration with a minimal ringing of -22.5 dB, providing good symmetry and low level of ringing. A high degree of coordination between the simulated and measured results is achieved.
Highlights
Ultra-wideband narrow pulse is an important aspect of any study relating to ultra-wideband (UWB) radar and the UWB wireless communication system [1,2,3] owing to its high-resolution applications and simple system architecture
The UWB narrow pulse can be further segregated into the classifications of step pulse, Gaussian pulse and the single-cycle pulse
Step pulse and Gaussian pulse are suitable to be adopted to the receivers, because their high DC components are difficult to be emitted by the antenna
Summary
Ultra-wideband narrow pulse is an important aspect of any study relating to ultra-wideband (UWB) radar and the UWB wireless communication system [1,2,3] owing to its high-resolution applications and simple system architecture. The UWB narrow pulse can be further segregated into the classifications of step pulse, Gaussian pulse and the single-cycle pulse All these pulses have wide frequency spectrums [6]. In former research [14], we introduced a subnanosecond-wide Gaussian pulse using the shunt-connected SRD model, resulting in a ringing level of about -15dB. Our intention is to design a low-ringing monocycle picosecond pulse and to advance our former work [14, 16], with the aim of generating a signal which possesses both lower ringing and an acceptable amplitude. When extraction of all the minority carriers has taken place, the backward current is suddenly reduced to an extremely low level, cutting off the diode and forming the step voltage
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