Method and remotely adjustable reactive and resistive electrical elements
First Claim
1. A method comprising:
- providing an RF circuit in a remote environment, wherein the RF circuit includes an electrical component having a characteristic impedance at a resonance frequency of the RF circuit in the remote environment;
changing a characteristic of the remote environment that affects the characteristic impedance and the resonance frequency of the RF circuit;
sensing a parameter of the RF circuit and generating an electrical feedback signal based on the sensed parameter; and
based on the electrical feedback signal, automatically changing the electrical component to adjust both the characteristic impedance and the resonance frequency.
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Accused Products
Abstract
Apparatus and method that includes providing a variable-parameter electrical component in a high-field environment and based on an electrical signal, automatically moving a movable portion of the electrical component in relation to another portion of the electrical component to vary at least one of its parameters. In some embodiments, the moving uses a mechanical movement device (e.g., a linear positioner, rotary motor, or pump). In some embodiments of the method, the electrical component has a variable inductance, capacitance, and/or resistance. Some embodiments include using a computer that controls the moving of the movable portion of the electrical component in order to vary an electrical parameter of the electrical component. Some embodiments include using a feedback signal to provide feedback control in order to adjust and/or maintain the electrical parameter. Some embodiments include a non-magnetic positioner connected to an electrical component configured to have its RLC parameters varied by the positioner.
91 Citations
27 Claims
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1. A method comprising:
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providing an RF circuit in a remote environment, wherein the RF circuit includes an electrical component having a characteristic impedance at a resonance frequency of the RF circuit in the remote environment; changing a characteristic of the remote environment that affects the characteristic impedance and the resonance frequency of the RF circuit; sensing a parameter of the RF circuit and generating an electrical feedback signal based on the sensed parameter; and based on the electrical feedback signal, automatically changing the electrical component to adjust both the characteristic impedance and the resonance frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 21, 22, 23, 24, 25, 26)
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10. A computer-readable medium having instructions stored thereon for causing a suitably programmed information processor to execute a method that comprises:
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sensing a parameter of an RF circuit in a remote environment, wherein the RF circuit includes an electrical component having a characteristic impedance at a resonance frequency of the RF circuit in the remote environment, and wherein a characteristic of the remote environment is changed that affects the characteristic impedance and the resonance frequency of the RF circuit;
generating an electrical feedback signal based on the sensed parameter; andbased on the electrical feedback signal, automatically changing the electrical component to adjust both the characteristic impedance and the resonance frequency. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 27)
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19. An apparatus comprising:
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an RF circuit in a remote environment, wherein the RF circuit includes an electrical component having a characteristic impedance at a resonance frequency of the RF circuit in the remote environment, and wherein when a characteristic of the remote environment is changed the change affects the characteristic impedance and the resonance frequency of the RF circuit; a sensor that senses a parameter of the RF circuit and generates an electrical feedback signal based on the sensed parameter; and an information-processing control system that, based on the electrical feedback signal, automatically changes the electrical component to adjust both the characteristic impedance and the resonance frequency. - View Dependent Claims (20)
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Specification