Antenna structure for transmitting and/or receiving waves of metric or decimetric frequency, which comprises n colinear antennas, with n≥2, - each antenna (10; 20; 30; 40; 50) comprising a radiating portion comprising a first series of i radiating elements (12 1, 12 2; 22 1, 22 2; 32 1, 32 2; 42 1, 42 2; 52 1, 52 2) coaxial about a first axis, alternating with at least one additional series of i coaxial radiating elements (111, 112; 211, 212; 311, 312; 411, 412; 511, 51 2), each additional series being arranged about an axis different from the first axis, with i≥2, - each antenna (10; 20; 30) being independently powered by a coaxial cable at the level of an excitation input (16; 26; 36), - each antenna (10; 20; 30) comprising at least one first quarter wavelength trap (15; 25; 35) arranged between the excitation input (16; 26; 36) and a first end of the radiating portion, and at least one second quarter wavelength trap (14; 24; 34) arranged at the level of a second end of the radiating portion, - at least one first antenna comprising at least n-1 hollow cores (190, 191) extending over the whole length, said hollow cores forming the axes of the series of coaxial radiating elements and at least one of the hollow cores being configured to receive a coaxial cable intended for powering another antenna colinear to the first antenna, - at least one intermediate quarter wavelength trap (131; 231) being arranged between two consecutive colinear antennas about a coaxial cable, and - a terminal element (13; 23; 33), arranged at the level of the second end of the radiating portion after the second quarter wavelength trap (14; 24; 34), and formed from the hollow core(s) of the antenna. - each antenna (10; 20; 30; 40; 50) comprising a radiating portion comprising a first series of i radiating elements (12 1, 12 2; 22 1, 22 2; 32 1, 32 2; 42 1, 42 2; 52 1, 52 2) coaxial about a first axis, alternating with at least one additional series of i coaxial radiating elements (111, 112; 211, 212; 311, 312; 411, 412; 511, 51 2), each additional series being arranged about an axis different from the first axis, with i≥2, - each antenna (10; 20; 30) being independently powered by a coaxial cable at the level of an excitation input (16; 26; 36), - each antenna (10; 20; 30) comprising at least one first quarter wavelength trap (15; 25; 35) arranged between the excitation input (16; 26; 36) and a first end of the radiating portion, and at least one second quarter wavelength trap (14; 24; 34) arranged at the level of a second end of the radiating portion, - at least one first antenna comprising at least n-1 hollow cores (190, 191) extending over the whole length, said hollow cores forming the axes of the series of coaxial radiating elements and at least one of the hollow cores being configured to receive a coaxial cable intended for powering another antenna colinear to the first antenna, - at least one intermediate quarter wavelength trap (131; 231) being arranged between two consecutive colinear antennas about a coaxial cable, and - a terminal element (13; 23; 33), arranged at the level of the second end of the radiating portion after the second quarter wavelength trap (14; 24; 34), and formed from the hollow core(s) of the antenna.