Patent ID: 9711863
Date: 2017-07-18
CPC Classifications: H01Q

Claim:
1. A dual band antenna, comprising: a planar dielectric substrate having a first surface and a second surface opposite the first surface; a conductive layer situated on the second surface of the planar dielectric substrate, the conductive layer defining a conductive ground plane and a nonconductive keepout area; first, second, and third radiating conductors defined on a first surface of the planar dielectric substrate in an antenna area that is opposite the nonconductive keepout area, the first, second, and third radiating conductors without direct electrical connection to the conductive ground plane, wherein the second and the third radiating conductors are spaced apart from the first radiating conductor and are capacitively coupled to the first radiating conductor without conductive coupling, wherein the first radiating conductor is a conductive rectangle; and a transmitter feed line in electrical contact with the first radiating conductor and configured to communicate a radio frequency electrical signal, wherein the first radiating conductor is selected based on a quarter wavelength at a first frequency in a first frequency band, the second radiating conductor is selected based on a half wavelength at a frequency in a second frequency band different from the first frequency band, the third radiating conductor is selected based on a half wavelength at a second frequency in the first frequency band, and an effective length of the first radiating conductor corresponds to the quarter wavelength at the first frequency.