Title :
Balanced pulse generator for UWB radar application
Author :
Ameri, Ahmed Abbas H ; Kompa, Günter ; Bangert, Axel
Author_Institution :
Dept. of Microwave Electron., Univ. of Kassel, Kassel, Germany
Abstract :
A balanced pulse generator delivering high repetitive pulses of high voltage amplitude and pulse widths in the picosecond region is described. The output pulses of a npn silicon power transistor operating in an avalanche mode, drive a step recovery diode (SRD) waveform edge sharpener. As commercially available ultra-fast SRDs have commonly low breakdown voltage, the powerful avalanche pulses with a high voltage of 65V are first split into balanced pulses using a balun transformer. Then the balanced pulses with half amplitude are fed to ultra-fast SRD pulse shaping circuits exhibiting nearly balanced pulses with peak values of 25V (26V) and pulse widths of 140 ps (135 ps). The pulses are intended for application in near-field UWB radar sensors.
Keywords :
baluns; charge storage diodes; power transistors; pulse generators; pulse shaping circuits; silicon; ultra wideband radar; SRD waveform edge sharpener; avalanche pulses; balanced pulse generator; balun transformer; breakdown voltage; near-field UWB radar sensors; npn silicon power transistor; picosecond region; pulse widths; step recovery diode; ultrafast-SRD pulse shaping circuits; voltage 65 V; voltage amplitude; Impedance matching; Optical pulse generation; Pulse shaping methods; Radar antennas; Transistors; Ultra wideband radar; SRD pulse circuit; Ultra-wideband; avalanche effect; balun transformer; pulse generator;
Conference_Titel :
Radar Conference (EuRAD), 2011 European
Conference_Location :
Manchester
Print_ISBN :
978-1-4577-1156-5
