Dipole antenna for safety helmets
AssigneeNolangroup S.P.A.
InventorsAngelo Boni, Marco Mazzali
Life of this patent
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Abstract
Substantially-linear dipole antenna for safety helmets, of the type comprising two conductive branches arranged to be electrically connected, at one of their ends, to respective radio equipment, the two conductive branches being disposed substantially aligned. The two conductive branches have a length essentially equal to ¼ of the expected operative wavelength of the radio equipment. The dipole antenna further comprises at least two conductive arms, each having a length essentially equal to ½ of said operative wavelength, each of which is electrically connected respectively to the free end of both of the two conductive branches, both having a length essentially equal to ¼ of the operative wavelength.
Claims14
A safety helmet comprising:
- at least one outer cap enclosing at least one shell made of a shock-absorbing material;
- and
- a coupling means for coupling said outer cap to a substantially-linear dipole antenna,
- wherein the dipole antenna comprises two conductive branches arranged to be electrically connected, at each one of their ends, to a respective radio equipment,
- the two conductive branches are disposed substantially aligned and both have a length essentially equal to ¼ of a predefined operative wavelength,
- the dipole antenna further comprises at least two conductive arms, each having a length essentially equal to ½ of said operative wavelength, and
- each of said at least two conductive arms is electrically connected respectively to each free end of said two conductive branches.
Dependencies are inferred from the claim text.