Multi-band loaded antenna

摘要

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.

主权项

1. 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.