A high-power synthesized ultrawideband radiation source

Area of Science:

• Electromagnetics and Applied Physics
• Pulsed Power Systems

Background:

• Development of ultrawideband (UWB) radiation sources is crucial for various applications.
• Existing sources often face limitations in frequency control and power output.

Purpose of the Study:

• To develop a high-power UWB radiation source capable of synthesizing electromagnetic pulses with controllable frequency bands.
• To investigate stable operation of gas gaps in independent pulse-forming channels without external triggering.

Main Methods:

• A novel four-channel bipolar pulse forming circuit with 2 ns and 3 ns pulse durations was designed.
• A 2x2 array of combined antennas was utilized, with each element driven by an individual pulse-forming channel.
• Two distinct radiation synthesis modes were explored by adjusting time delays between pulses.

Main Results:

• Mode 1 (ultimate field strength) yielded radiation pulses with a 0.2-0.8 GHz band and 500 kV effective potential.
• Mode 2 (ultimate spectral width) produced pulses with a 0.1-1 GHz band and 220 kV effective potential.
• Stable operation of gas gaps was achieved without external control pulses at a 100 Hz repetition frequency.

Conclusions:

• The developed UWB radiation source offers flexible synthesis of electromagnetic pulses with tailored frequency bands and high power.
• The circuit design and operational conditions enable stable and controllable generation of high-power UWB pulses.
• This technology advances the capabilities for generating ultrawideband electromagnetic pulses for diverse scientific and technological applications.