Proximity-coupled loop antenna
OwnerLiang-Sywan Edward Jeninventor
Life of this patent
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Abstract
A proximity-coupled loop antenna. The proximity-coupled loop antenna includes a dielectric substrate, a ground plane having a direct-fed strip cut therefrom, a radio frequency port, a coupled strip cut therefrom, a first edge cut therefrom parallel the direct-fed strip and a second edge cut therefrom adjacent the first edge situated on the dielectric substrate, the first and second edges of the ground plane having a total length of approximately one-quarter wavelength of the lowest resonant frequency of the antenna and forming a conductive resonant edge.
Claims17
A proximity-coupled loop antenna, comprising:
- a dielectric substrate;
- a ground plane situated on the dielectric substrate, the ground plane cut to form a first edge, a second edge adjacent to the first edge, a direct-fed angled strip, and an angled coupling strip, the first and second edges of the ground plane having a total length of approximately one-quarter wavelength of the lowest resonant frequency of the antenna and forming a conductive resonant edge;
- the direct-fed angled strip extending from the first edge of the ground plane having an angled segment that is parallel to the first cut edge of the ground plane directed toward the second cut edge of the ground plane;
- one of a signal and a radio frequency port connected to the ground plane in the direct-fed angled strip;
- and
- an angled coupling strip extending from the first edge of the ground plane, the angled coupling strip adjacent to and not connected to the direct-fed angled strip, the angled coupling strip having an angled segment that is substantially parallel to the angled segment of the direct-fed angled strip, substantially parallel to the first edge of the ground plane, and directed toward the second edge of the ground plane.
A method of capturing and transmitting radio electromagnetic waves propagating through space, comprising:
- attaching a signal port to an angled direct-fed radiating strip portion of a conductive ground plane, extending from a first edge cut from the ground plane and toward a second edge cut from the ground plane, the first and second edges having a total length of approximately one-quarter wavelength of the radio electromagnetic waves;
- electrically coupling an angled coupled radiating strip, at least a portion of which is parallel to the angled direct-fed radiating strip and separated from the angled direct-fed radiating strip by a nonconductive strip, to the angled direct-fed radiating strip and the first and second edges cut from the conductive ground plane;
- and
- creating a capacitance between the angled direct-fed radiating strip and the first and second edges cut from the conductive ground plane, at least a portion of the first and second edges parallel to at least a portion of the angled direct-fed radiating strip.
Dependencies are inferred from the claim text.