초록 ▼

An asymmetric dipole antenna assembly is provided for wireless communications devices, and includes separate upper and lower conductor traces and a low impedance feedpoint at the junction of the conductor traces. The upper conductor trace may include a matching network and may be printed on a planar

An asymmetric dipole antenna assembly is provided for wireless communications devices, and includes separate upper and lower conductor traces and a low impedance feedpoint at the junction of the conductor traces. The upper conductor trace may include a matching network and may be printed on a planar printed circuit board mounted proximate the top of the a hand-held wireless transceiver. The upper conducting trace provides 1/4 wave resonance over a desired frequency range and a 50 ohm input impedance for the antenna. The lower conductor trace may be provided by the ground trace of the wireless device circuitry, requiring only a minimum effective trace length of 1/4 wavelength at the lowest frequency of operation. Polarization of the antenna is determined by the orientation of the longest dimension of the lower conductor.

대표청구항 ▼

[ We claim:] [1.]1. An asymmetric dipole antenna assembly for a communications device operating at a predetermined wavelength and having a transceiver circuit including a signal output and a ground plane, said antenna assembly comprising:a first dipole half including a first conductor trace disposed

[ We claim:] [1.]1. An asymmetric dipole antenna assembly for a communications device operating at a predetermined wavelength and having a transceiver circuit including a signal output and a ground plane, said antenna assembly comprising:a first dipole half including a first conductor trace disposed upon a first dielectric substrate, said first conductor trace having a first end and a one-quarter wavelength electrical length; anda second dipole half including a second conductor trace disposed upon a second dielectric substrate, said second conductor trace being operatively coupled to the ground plane of the transceiver circuit;said first conductor trace being operatively coupled proximate said first end to the ground plane of the transceiver circuit;said first conductor trace being operatively coupled to the transceiver circuit signal output at a predetermined distance away from the first end; andsaid first conductor trace being disposed a predetermined isolation distance away from the second conductor trace.