Adiabatic and fast passage ultra-wideband inversion in pulsed EPR

► Extension of ordinary pulsed EPR spectrometer by 12GS/s AWG for chirped excitation. ► Pulses compensating for bandwidth effects to exceed actual bandwidth limitations. ► Suppression of spectral diffusion in IR by almost complete inversion of nitroxide. ► Threefold enhancement of DEER modulation depth when pumping on a metal center.