Portable device and near field communication chip
First Claim
Patent Images
1. A portable device, comprising:
- a NFC chip;
a case configured to generate a first magnetic field based on an electrical signal from the NFC chip;
a matching circuit configured to match impedances of the NFC chip and the case; and
a loop antenna physically separated from the NFC chip and the case, and the loop antenna configured to magnetically couple to the case such that the loop antenna forms a second magnetic field in response to the first magnetic field,wherein the matching circuit includes a transformer,a loop coil connected to the NFC chip in parallel with the case, the loop coil surrounding the loop antenna.
0 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment, the antenna arrangement includes a primary antenna having a conductive sidewall; and a loop antenna disposed in and physically separated from the primary antenna. The loop antenna includes a first conductive loop and a capacitor electrically connected between ends of the first conductive loop.
86 Citations
14 Claims
-
1. A portable device, comprising:
-
a NFC chip; a case configured to generate a first magnetic field based on an electrical signal from the NFC chip; a matching circuit configured to match impedances of the NFC chip and the case; and a loop antenna physically separated from the NFC chip and the case, and the loop antenna configured to magnetically couple to the case such that the loop antenna forms a second magnetic field in response to the first magnetic field, wherein the matching circuit includes a transformer, a loop coil connected to the NFC chip in parallel with the case, the loop coil surrounding the loop antenna. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A portable device, comprising:
-
a case including a conductive material, the case having at least a first terminal; a near field communication (NFC) device electrically connected to the first terminal of the case, the NFC device configured to provide an electrical signal to the case such that the case radiates a first magnetic field based on the electrical signal; a loop antenna inside the case, the loop antenna configured to magnetically couple to the case such that the loop antenna forms a second magnetic field in response to the first magnetic field; and a loop coil connected to the NFC chip in parallel with the case, the loop coil surrounding the loop antenna, wherein the loop antenna is physically separate from the case and the NFC device. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
Specification