Miniature and multi-band RF coil design
AssigneeHong Kong Applied Science and Technology Research Institute Company Limited
InventorsCorbett R. Rowell, Hau-Wah Lai, Chi-Lun Mak
Life of this patent
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Abstract
A near field apparatus comprises a Radio Frequency (RF) coil including at least one of a shorting bridge from a first point to a second point along an electrical path of the RF coil and/or a discontinuity in the electrical path of the RF coil.
Claims23
A near field apparatus comprising:
- a near field Radio Frequency (RF) coil including:
- a shorting bridge from a first point to a second point along an electrical path of the RF coil;
- and
- a discontinuity in the electrical path of the RF coil;
- and
- a transmission line input and output to the RF coil, wherein an impedance of the RF coil matches an impedance of the transmission line input and output.
A method for creating a Radio Frequency (RF) coil that includes one or more of a shorting bridge within the RF coil's current path and a current path discontinuity within the RF coil to provide a selected operating frequency and impedance, said method comprising:
- determining the placement of the one or more of a current path discontinuity and a shorting bridge by performing one or more actions selected from the list consisting of:
- creating one or more computer simulations of the RF coil to arrive at a placement of the one or more of a current path discontinuity and a shorting bridge that satisfies the selected operating frequency and the selected impedance;
- and
- creating and testing one or more prototypes of the RF coil to arrive at a placement of the one or more of a current path discontinuity and a shorting bridge that satisfies the selected operating frequency and the selected impedance;
- manufacturing the RF coil with the one or more of the current path discontinuity and the shorting bridge configured according to the determined placement;
- and disposing the RF coil in a near field application.
A near field Radio Frequency Identification (RFID) device comprising:
- a miniaturized near field Radio Frequency (RF) coil that includes a current path with a shorting bridge and a discontinuity in the current path of the RF coil providing impedance matching and frequency shifting for the RF coil;
- and
- supporting circuitry in the RFID device facilitating one or both of transmission and detection of RF energy by the RF coil.
A Magnetic Resonance Imaging (MRI) apparatus comprising:
- a near field Radio Frequency (RF) coil that includes a current path with a shorting bridge and a discontinuity in the current path of the RF coil providing impedance matching and frequency shifting for the RF coil;
- and
- supporting circuitry in the MRI machine facilitating one or both of transmission and detection of RF energy by the RF coil.
Dependencies are inferred from the claim text.