Near field communication antenna

摘要

A near field communication (NFC) antenna including a dielectric substrate, a coil, and a coupling structure is provided. The coil is disposed on the dielectric substrate. The coupling structure includes at least one coupling branch. Two ends of the coupling branch are respectively connected to two different connection points on the coil. The coupling structure is configured to improve the isotropic characteristics of the NFC antenna.

主权项

1. A near field communication (NFC) antenna, comprising:
a dielectric substrate; a coil, disposed on the dielectric substrate, wherein the coil has a rectangular shape which has two long sides and two short sides; and a coupling structure, comprising a plurality of coupling branches, wherein each of the coupling branches has two ends respectively connected to two different connection points on the coil, and the coupling branch is interconnected between the two long sides of the coil, wherein the coil and the coupling structure are respectively disposed on two opposite surfaces of the dielectric substrate, and wherein the coil disposed on, the dielectric substrate comprises a left region, a central region, and a right region, the plurality of coupling branches are disposed in the left region and the right region symmetrically, and the left region is completely separated from the right region by the central region.