Coupled antenna structure and methods
First Claim
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1. Coupled antenna apparatus, comprising:
- a plurality of antenna radiating elements, the plurality of antenna radiating elements comprising;
an outer radiating element comprising an outer element disposed proximate an outer surface of a host device;
an inner feed element; and
a middle radiating element disposed proximate to the outer radiating element, the middle radiating element comprising a middle element disposed between the outer radiating element and the inner feed element, the inner feed element disposed proximate to the middle radiating element, the inner feed element further disposed substantially internal to the host device;
wherein the outer radiating element, the middle radiating element, and the inner feed element are each electromagnetically coupled with one or more of the other radiating elements of the plurality, and cooperate to provide a circular polarization optimized for receipt of positioning asset wireless signals;
wherein the outer radiating element, the middle radiating element, and the inner feed element are not galvanically coupled to one another;
wherein the outer radiating element and the middle radiating element are not galvanically coupled to a radio frequency feed; and
wherein the inner feed element comprises a ground point and a galvanically connected feed point.
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Abstract
Antenna apparatus and methods of use and tuning. In one exemplary embodiment, the solution of the present disclosure is particularly adapted for small form-factor, metal-encased applications that utilize satellite wireless links (e.g., GPS), and uses an electromagnetic (e.g., capacitive) feeding method that includes one or more separate feed elements that are not galvanically connected to a radiating element of the antenna. In addition, certain implementations of the antenna apparatus offer the capability to carry more than one operating band for the antenna.
489 Citations
17 Claims
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1. Coupled antenna apparatus, comprising:
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a plurality of antenna radiating elements, the plurality of antenna radiating elements comprising; an outer radiating element comprising an outer element disposed proximate an outer surface of a host device; an inner feed element; and a middle radiating element disposed proximate to the outer radiating element, the middle radiating element comprising a middle element disposed between the outer radiating element and the inner feed element, the inner feed element disposed proximate to the middle radiating element, the inner feed element further disposed substantially internal to the host device; wherein the outer radiating element, the middle radiating element, and the inner feed element are each electromagnetically coupled with one or more of the other radiating elements of the plurality, and cooperate to provide a circular polarization optimized for receipt of positioning asset wireless signals; wherein the outer radiating element, the middle radiating element, and the inner feed element are not galvanically coupled to one another; wherein the outer radiating element and the middle radiating element are not galvanically coupled to a radio frequency feed; and wherein the inner feed element comprises a ground point and a galvanically connected feed point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Capacitively coupled antenna apparatus, comprising a plurality of stacked radiator elements that comprise discrete outer radiator element, middle radiator element, and inner feed radiator element, the antenna apparatus configured to have a right-handed circular polarization (RHCP) isolation gain that is substantially greater than a left-handed circular polarization (LHCP) isolation gain thereof, thereby enhancing sensitivity to satellite positioning signals;
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wherein the outer radiator element comprises an outer element disposed proximate an outer metallic housing of a host device, the middle radiator element disposed between the outer radiator element and the inner feed radiator element, and the inner feed radiator element comprises a ground point and a galvanically connected feed point, the inner feed radiator element being disposed substantially internal to the host device; and wherein the outer radiator element and the middle radiator element are both not galvanically coupled to a radio frequency feed. - View Dependent Claims (10, 11, 12)
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13. Satellite positioning-enabled wireless apparatus, comprising:
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a wireless receiver configured to at least receive satellite positioning signals; and antenna apparatus in signal communication with the receiver, the antenna apparatus comprising; a stacked configuration comprising an outer radiator element that is free of a galvanic coupling to a feed point, at least one middle radiator element that is free of a galvanic coupling to a feed point, the at least one middle radiator element disposed internal to the outer radiator element, and an inside feed element, the inside feed element further comprising a ground point, the inside feed element further configured to be galvanically coupled with a feed point, and the at least one middle radiator element configured to be electromagnetically coupled to the inside feed element. - View Dependent Claims (14, 15, 16, 17)
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Specification