We have carried out high frequency radio observations of the high magnetic
field pulsar PSR J1119-6127 following its recent X-ray outburst. While initial
observations showed no evidence of significant radio emission, subsequent
observations detected pulsed emission across a large frequency band. In this
letter, we report on the initial disappearance of the pulsed emission and its
prompt reactivation and dramatic evolution over several months of observation.
The periodic pulse profile at S-band (2.3 GHz) after reactivation exhibits a
multi-component emission structure, while the simultaneous X-band (8.4 GHz)
profile shows a single emission peak. Single pulses were also detected at
S-band near the main emission peaks. We present measurements of the spectral
index across a wide frequency bandwidth, which captures the underlying changes
in the radio emission profile of the neutron star. The high frequency radio
detection, unusual emission profile, and observed variability suggest
similarities with magnetars, which may independently link the high energy
outbursts to magnetar-like behavior.