Development of a compact monocycle pulse generator for UWB impulse radar applications

摘要

In this paper, a compact size (16 x 16 mm) of the monocycle pulse generator is proposed for Ultrawide-band (UWB) impulse radar applications. The proposed circuit is based on the step recovery diodes (SRDs) and has a very simple structure. It consists of a coupling part, short pulse generating part, and monocycle forming part. The performance of the pulse generator is compared against simulation results which are performed by advanced design system (ADS). The measured monocycle waveform has a pulse width of 150 ps with the tail ringing level of -11 dB and symmetry of 87%. The corresponding spectrum has a center frequency of around 2.6 GHz with -10 dB bandwidth of 4 GHz. The performance of the pulse generator is validated by analyzing the receiving waveform. The pulse width and the ringing level of the received waveform are observed to be 250 ps and -11 dB, respectively. The developed compact monocycle pulse generator is very attractive because of the ease of integration into the limited physical space inside the UWB system.