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US 8,947,301 B2Granted
Multi-band loaded antenna
AssigneeCardiac Pacemakers, Inc.
InventorsDavid Nghiem, Peter J. Musto, Larry D. Canady, Keith R. Maile
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Abstract
A planar antenna for wireless information transfer can include a planar loading portion electrically coupled to a driven node of a wireless communication circuit, and a folded conductive strip portion coupled to the planar loading portion, the folded conductive strip portion comprising at least two segments laterally offset from each other and at least partially laterally overlapping with each other. The planar loading portion can be configured to establish a specified bandwidth of a second operating frequency range, leaving a first specified operating frequency range substantially unchanged.
Claims20
A planar antenna for wireless information transfer, the planar antenna comprising:
- a planar loading portion electrically coupled to a driven node of a wireless communication circuit, the planar loading portion including an edge distal to the driven node of the wireless communication circuit;
- and
- a folded conductive strip portion coupled to the planar loading portion, the folded conductive strip portion comprising at least two segments laterally offset from each other and at least partially laterally overlapping with each other;
- wherein the folded conductive strip portion is configured to establish a first specified operating frequency range at or near resonance using a mode corresponding to a total physical path length along the folded conductive strip portion, and configured to establish a second, higher, specified operating frequency range at or near resonance using a mode corresponding to about half of the total physical path length;
- and
- wherein the planar loading portion is configured to establish a specified bandwidth of the second or another, higher, specified operating frequency range, leaving the first specified operating frequency range substantially unchanged.
3 more elements
An apparatus, comprising:
- An external assembly comprising:
- a wireless communication circuit configured for wireless information transfer between an implantable medical device and the external assembly;
- and
- a planar antenna coupled to the wireless communication circuit, the planar antenna configured for wireless information transfer between an implantable medical device and an external assembly, the planar antenna comprising:
- a planar loading portion electrically coupled to a driven node of a wireless communication circuit, the planar loading portion including an edge distal to the driven node of the wireless communication circuit;
- and
- a folded conductive strip portion coupled to the planar loading portion, the folded conductive strip portion comprising at least two segments laterally offset from each other and at least partially laterally overlapping with each other;
- wherein the folded conductive strip portion is configured to establish a first specified operating frequency range at or near resonance using a mode corresponding to a total physical path length along the folded conductive strip portion, and configured to establish a second, higher, specified operating frequency range at or near resonance using a mode corresponding to about half of the total physical path length;
- wherein the planar loading portion is configured to establish a specified bandwidth of the second or another, higher, specified operating frequency range, leaving the first specified operating frequency range substantially unchanged;
- and
- wherein a physical length of the planar loading portion is about a quarter of an effective wavelength, the effective wavelength corresponding to an intermediate frequency between the first and second specified operating frequency ranges.
8 more elements
A method, comprising:
- forming a planar loading portion of a planar antenna;
- electrically coupling the planar loading portion to a driven node of a wireless communication circuit, the planar loading portion including an edge distal to the driven node of the wireless communication circuit;
- and
- forming a folded conductive strip portion;
- electrically coupling the folded conductive strip portion to the planar loading portion, the folded conductive strip portion comprising at least two segments laterally offset from each other and at least partially laterally overlapping with each other;
- establishing a first specified operating frequency range at or near resonance for the planar antenna using a mode corresponding to a total physical path length along the folded conductive strip portion;
- establishing a second, higher, specified operating frequency range at or near resonance for the planar antenna using a mode corresponding to about half of the total physical path length;
- and
- using the planar loading portion, establishing a specified bandwidth of the second or another, higher, specified operating frequency range, leaving the first specified operating frequency range substantially unchanged.
6 more elements
Dependencies are inferred from the claim text.