Review of the ultra wideband pulse generation

Over the past decade, extensive research work in the field of Ultra Wideband(UWB) technology has given fascinating results in many applications. Initially UWB was developed as a military tool but recently it has been applied in consumer electronics and communication as well as in medical imaging. To implement this technology, it is required to generate subnanosecond pulses. At the beginning it was generated by spark gap techniques, but over time the pulse generation technique has changed. Recently, Step Recovery Diode (SRD) and Microwave transistors are widely used for the generation of UWB subnanosecond pulses. This paper present review of the principles of generation of UWB subnanosecond pulses.