Log-periodic antenna

Details Log-periodic antenna Log-periodic antenna

2005-10-04

2005-10-04

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

Logarithmically periodic

C343S841000

Reexamination Certificate

active

06952189

ABSTRACT:
A self-similar log-periodic antenna is described comprising a plurality of substantially triangular conductive elements,4,symmetrically disposed in either planar or curved configurations about a central conductive boom to form an antenna arm. Two or more antenna arms are assembled into an antenna by symmetrically locating such antenna arms substantially in the shape of a pyramid (for planar arms) or in a conical shape (for curved arms). Some embodiments include a conductive fin,5,to reduce cross-polarization coupling between antenna arms. Some embodiments include a grounded conductive shield on the interior of the antenna providing electromagnetic shielding for the interior region of the antenna while preserving the self-similar geometry of the antenna and shield combination.

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