Patent ID: 6486836
Filing Date: 2002-11-26
Classification: H01Q

Abstract:
A hand held wireless communications device having a signal line and a ground plane, said device comprisingan enclosure for said device, an antenna, at least partly within said enclosure, said antenna operating within a frequency band and including a driven element and a parasitic director element, said driven element being an asymmetric dipole formed from a plurality of conductive traces disposed upon a first dielectric substrate, including a first conductive resonator trace and a second conductive radiating trace, said first conductive resonator trace having an elongated form and having electrical length of approximately one-quarter of a wavelength within said frequency band, said first conductive resonator trace being coupled to both the signal line and the ground plane of the wireless communications device, said second conductive radiating trace being coupled to the ground plane, said parasitic director element being a conductor disposed upon a second dielectric substrate having a length dimension of approximately a half of the wavelength, said parasitic director element spaced from said driven element in a direction generally perpendicular to the first dielectric substrate by 0.01 to 0.1 wavelength within said frequency band.