| 摘要 |
Substantially-linear dipole antenna (100) for safety helmets (1), of the type comprising two conductive branches (3) arranged to be electrically connected, at one of their ends, to a respective radio equipment (4), the two conductive branches being disposed substantially aligned. The two conductive branches (3) have a length essentially equal to 1/4 of the expected operative wavelength of the radio equipment (4). The dipole antenna (100) further comprises at least two conductive arms (8), each having a length essentially equal to 1/2 of said operative wavelength, each of which is electrically connected respectively to the free end of both of the two conductive branches (3), both having a length essentially equal to 1/4 of the operative wavelength. |
