摘要:
An apparatus includes a first magnetic resonance (MR) coil element configured to output a first set of MR data at a first output frequency and a first mixer coupled to the first MR coil element. The first mixer is configured to receive the first set of MR data from the first MR coil element and frequency translate the first set of MR data to a first offset frequency different from the first output frequency by a first offset value. The apparatus also includes a digitizer coupled to the first mixer and configured to convert the frequency-translated first set of MR data into a set of digital data and a transmission line coupled to the first mixer and to the digitizer, the transmission line configured to transmit the frequency-translated first set of MR data from the MR coil element to the digitizer without a balun coupled to the transmission line.
摘要:
An apparatus includes a first magnetic resonance (MR) coil element configured to output a first set of MR data at a first output frequency and a first mixer coupled to the first MR coil element. The first mixer is configured to receive the first set of MR data from the first MR coil element and frequency translate the first set of MR data to a first offset frequency different from the first output frequency by a first offset value. The apparatus also includes a digitizer coupled to the first mixer and configured to convert the frequency-translated first set of MR data into a set of digital data and a transmission line coupled to the first mixer and to the digitizer, the transmission line configured to transmit the frequency-translated first set of MR data from the MR coil element to the digitizer without a balun coupled to the transmission line.
摘要:
A microwave sensor assembly includes a signal processing device for generating at least one microwave signal that includes a pattern of frequencies and at least one probe coupled to the signal processing device. The probe includes an emitter configured to generate an electromagnetic field from the at least one microwave signal, wherein the emitter is detuned when an object is positioned within the electromagnetic field such that a loading signal is reflected from the emitter to the signal processing device.
摘要:
A system, device and methods, for determining at least two analytes, wherein the system and device include at least one resonant sensor circuit that includes a sensing material that predictably affects the resonant complex impedance response of a sensor electrode. The sensing material has at least two material properties that change when the materials are exposed to two or more analytes. The system and device also include a processor that generates a multivariate sensor response pattern that is based at least in part on a change in the two material properties of the sensing material.
摘要:
A microwave emitter for use in a microwave sensor assembly that includes an emitter body includes a first arm that extends radially outward from the emitter body. The first arm is at least partially non-linear and includes at least one peak and at least one trough. The microwave emitter also includes a second arm that extends radially outward from the emitter body. The second arm includes at least one peak and at least one trough. The first arm and the second arm generate an electromagnetic field when at least one microwave signal is received.
摘要:
A proximity sensor assembly with a sensing element having a substrate and an antenna pattern disposed on one or more planar surfaces of the substrate is disclosed. The cable is fed substantially parallel to the planar surfaces of the substrate and is attached to the side surface of the substrate, such that the cable is oriented substantially perpendicular to the direction of the electromagnetic field emitted from the sensing element.
摘要:
A microwave emitter for use in a microwave sensor assembly that includes an emitter body includes a first arm that extends radially outward from the emitter body. The first arm is at least partially non-linear and includes at least one peak and at least one trough. The microwave emitter also includes a second arm that extends radially outward from the emitter body. The second arm includes at least one peak and at least one trough. The first arm and the second arm generate an electromagnetic field when at least one microwave signal is received.
摘要:
A microwave sensor assembly includes at least one probe including an emitter configured to generate an electromagnetic field from at least one microwave signal. The emitter is also configured to generate at least one loading signal representative of a loading induced within the emitter by an object positioned within the electromagnetic field. The microwave sensor assembly also includes a signal processing device coupled to the at least one probe. The signal processing device includes a linearizer configured to generate a substantially linear output signal based on the at least one loading signal.
摘要:
A microwave probe for use in a microwave sensor assembly includes an emitter body and an emitter coupled to the emitter body. The emitter includes a first portion, a second portion, and a connecting portion coupling the first portion to the second portion. The first portion and the second portion generate an electromagnetic field when at least one microwave signal is received, and a loading is induced to the emitter when an object is positioned within the electromagnetic field.
摘要:
A microwave sensor assembly includes at least one probe including an emitter configured to generate an electromagnetic field from at least one microwave signal. The emitter is also configured to generate at least one loading signal representative of a loading induced within the emitter by an object positioned within the electromagnetic field. The microwave sensor assembly also includes a signal processing device coupled to the at least one probe. The signal processing device includes a linearizer configured to generate a substantially linear output signal based on the at least one loading signal.