Magnetic RFID coupler with balanced signal configuration
First Claim
Patent Images
1. An RFID magnetic coupler arrangement, comprising:
- an input signal source that provides an input signal having a target wavelength;
a splitter including a single conductive transmission line coupled to the signal source that receives the input signal and splits the input signal into a first signal and a second signal, said splitter being configured to phase-shift said second signal by 180 degrees;
a dielectric substrate having a longitudinal axis extending along a length thereof;
a first elongated conductive patch that receives the first signal and is disposed over a first surface of the substrate; and
a second elongated conductive patch that receives the second phase-shifted signal and is disposed over the first surface of the substrate opposite and spaced from the first conductive patch, wherein the first conductive patch and the second conductive patch are longitudinally aligned with one another and extend along the longitudinal axis of the dielectric substrate,the input signal source being disposed on a second surface of the substrate, the second surface of the substrate being on a vertically opposed side of the dielectric substrate to a side of the dielectric substrate defining the first surface of the substrate.
1 Assignment
0 Petitions
Accused Products
Abstract
A magnetic coupler arrangement that includes two quarter wave length strip patches, an input signal source, a signal splitter that splits an input signal from the input signal source into two signals and phase-shifts one of the two signals, wherein the phase-shifted signal and the non-phase-shifted signal are fed into the patches of the coupler to achieve a balanced signal configuration.
14 Citations
16 Claims
-
1. An RFID magnetic coupler arrangement, comprising:
-
an input signal source that provides an input signal having a target wavelength; a splitter including a single conductive transmission line coupled to the signal source that receives the input signal and splits the input signal into a first signal and a second signal, said splitter being configured to phase-shift said second signal by 180 degrees; a dielectric substrate having a longitudinal axis extending along a length thereof; a first elongated conductive patch that receives the first signal and is disposed over a first surface of the substrate; and a second elongated conductive patch that receives the second phase-shifted signal and is disposed over the first surface of the substrate opposite and spaced from the first conductive patch, wherein the first conductive patch and the second conductive patch are longitudinally aligned with one another and extend along the longitudinal axis of the dielectric substrate, the input signal source being disposed on a second surface of the substrate, the second surface of the substrate being on a vertically opposed side of the dielectric substrate to a side of the dielectric substrate defining the first surface of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of operating an RFID magnetic coupler arrangement, comprising:
-
providing an input signal having a target wavelength; splitting the input signal by a splitter including a single conductive transmission line into a first signal and a second signal; phase shifting the second signal by 180 degrees relative to the first signal to obtain a phase-shifted signal; and feeding the first signal and the phase-shifted signal to respective conductive patches residing on a dielectric substrate, thereby producing a magnetic field surrounding the respective conductive patches. - View Dependent Claims (13, 14, 15)
-
-
16. An RFID magnetic coupler arrangement, comprising:
-
an input signal source that provides an input signal having a target wavelength; a splitter coupled to the signal source that receives the input signal and splits the input signal into a first signal and a second signal, said splitter being configured to phase-shift said second signal by 180 degrees; a dielectric substrate having a longitudinal axis extending along a length thereof; a first elongated conductive patch that receives the first signal and is disposed over a first surface of the substrate; and a second elongated conductive patch that receives the second phase-shifted signal and is disposed over the first surface of the substrate opposite and spaced from the first conductive patch, wherein the first conductive patch and the second conductive patch are longitudinally aligned with one another and extend along the longitudinal axis of the dielectric substrate, wherein each of the first conductive patch and the second conductive patch is an elongated microstrip having a rectangular shape, and wherein the first conductive patch and the second conductive patch, upon receiving the first signal and the second phase-shifted signal, respectively, are surrounded by a magnetic field due to the electric current flowing in the first conductive patch and in the second conductive patch.
-
Specification