A frequency-tunable wideband high-power-microwave radiation system

A wideband radiation system with tunable center frequency is presented. The system is composed of a pulsed power source, a λ/4 coaxial transmission line oscillator, a ring switch, a coupler and a radiation antenna. The resonant frequency of the oscillator can be modified by sliding the ring switch on the inner transmission line. The coupler is designed with lumped capacitance and distributed inductance. The combined electric and magnetic dipoles antenna is designed in the range of 200 MHz to 400 MHz. And the wideband system is charged with a Tesla transformer whose output voltage is 500 kV on the 200 pF secondary capacitor. The range-normalized radiated E-field radiation factor is in the range of 95 kV to 130 kV and the FWHM of frequency spectrum is in the range of 10% to 30%.