Dipole antenna having coupling tabs
OwnerRoger John Butland, William Emil Heinzinventors
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Abstract
A dipole having radiating elements (9, 14) which taper from the proximal end (1) of the radiating element to the distal end (2) of the radiating element. Electrical coupling is provided between adjacent lateral edges of the radiating elements by means of spaced apart tabs (10, 11, 12, 13). Cut-away portions (5, 5a) are provided between the proximal end (1) and the tabs (3, 4). By adjusting the distance between and the extent to which the tabs (10, 11, 12, 13) overlap the real part of the impedance of the dipole may be adjusted. The dipole may thus be configured to be directly driven from a feed-line without requiring matching components. This results in reduced complexity and losses. The dipole also exhibits reduced impedance variation, increasing the bandwidth of the dipole.
Claims20
A dipole having first and second radiating elements with proximal and distal ends and lateral edges, the proximal ends of said radiating elements being connected to respective terminals of a drive point, the distal ends of said radiating elements extending outwardly from said drive point, and wherein reactive coupling is provided between said first and second radiating elements by spaced apart tabs positioned substantially at corners of the respective proximal ends and lateral edges of said radiating elements.
An antenna including a dipole having first and second radiating elements with proximal and distal ends and lateral edges, the proximal ends of said radiating elements being connected to respective terminals of a drive point, the distal ends of said radiating elements extending outwardly from said drive point, and wherein reactive coupling is provided between said first and second radiating elements by spaced apart tabs positioned substantially at corners of the respective proximal ends and lateral edges of said radiating elements.
A dipole having first and second radiating elements, the proximal ends of said radiating elements being connected to respective terminals of a drive point, the distal ends of said radiating elements extending outwardly from said drive point, characterised in that reactive coupling is provided, between adjacent lateral edges of said first and second radiating elements towards the proximal ends of said radiating elements, by pairs of spaced apart tabs connected to respective lateral edges of said radiating elements, wherein said pairs of spaced apart tabs connected to said first and second radiating elements lie in substantially overlapping relationship.
Dependencies are inferred from the claim text.