  Here we simulate the shape of a planetary transit observed at radio
wavelengths. The simulations use a light curve of the K4 star HAT-P-11 and its
hot Jupiter companion as proxy. From the HAT-P-11 optical light curve, a
prominent spot was identified (1.10 Rp and 0.6 Ic). On the radio regime, the
limb brighting of 30% was simulated by a quadratic function, and the active
region was assumed to have the same size of the optical spot. Considering that
the planet size is 6.35% of the the stellar radius, for the quiet star regions
the transit depth is smaller than 0.5%, however, this value can increase to ~2%
when covering an active region with 5.0 times the quiet star brightness
temperature.
