The present invention relates to an antenna (1) adapted to receive and transmit an electromagnetic field, in particular a radio signal, said antenna (1) comprising: a support element (2): a first reflector ( 10), in particular for the UHF band, mounted on said support element (2) and having a structure which comprises at least one grid (11); a second reflector, in particular for the VHF band; means (R. D) adapted to receive and transmit said electromagnetic Acid. The invention is characterized in that said second reflector comprises at least one support (30) and at least one rod (31) said at least one support (30) being pivoted to said at least one grid (11) in a manner such that it can rotate from a closed position to an open position, and vice versa, relative to said at least one grid (11) of the first reflector (10).