41 results about "Superconducting resonators" patented technology

The use of a superconducting resonator with continuous-wave (CW) excitation allows low-noise quadrupole resonance (QR) detection without the need for a lock-in amplifier. This allows detection times to be greatly reduced. Hence, for the first time, a CW QR spectrometer using a superconducting resonator can be used in a portable device, such as a hand-held wand for detecting explosives.

Narrowband quadrupole resonance (QR) probes were developed from thin-film high-temperature superconducting (HTS) resonators. The QR probes are useful in analyte-detection systems, in particular for the detection of nitrogen-containing compounds. Embodiments of the invention provide greater than an order of magnitude improvement in sensitivity and the ability to reject RF interference sources located outside the pass-band of a superconducting QR probe. Methods and apparatus are described for analyte detection and resonance frequency adjustment.

A superconducting tunable filter is disclosed that has a center frequency and a bandwidth able to be adjusted separately. The superconducting tunable filter includes a superconducting resonator filter pattern formed on a dielectric substrate; a dielectric or magnetic plate above the resonator filter pattern and having a through-hole; a dielectric or magnetic rod inserted in the through-hole; and a position controller which separately controls the position of the dielectric or magnetic plate and the position of the dielectric or magnetic rod relative to the resonator filter pattern.

A multimode resonator resonating at two or more frequencies is operated at cryogenic temperatures and composed of a superconducting material or a normal metal with a superconducting section serving as a RF superconducting switch. The multimode resonator is coupled to a NMR spectrometer and a RF switch power source, wherein its one frequency is selected to correspond to the operating frequency of the NMR spectrometer and at least a second frequency is tuned to a frequency of RF switch power source, unrelated to the spectrometer frequency, therefore power at this frequency does not perturb the operation of the spectrometer. When activated, the RF switch power source induces a current sufficient to approach or exceeds the critical current in one or more sections of the superconducting material of the multimode resonator, thereby increasing its resistance and reducing the Q factor of the multimode resonator.

A superconducting filter device is disclosed that is able to prevent current concentration and improve electrical surface resistance. The superconducting filter device includes a first dielectric substrate, and a bulk superconducting resonator that is embedded in the first dielectric substrate and is formed from a bulk superconducting material.

The invention relates to a variable frequency superconducting microstrip line resonator, which comprises an upper-layer superconducting resonator structure, a lower-layer superconducting thin film and a dielectric substrate positioned between the upper-layer superconducting resonator structure and the lower-layer superconducting thin film. The variable frequency superconducting microstrip line resonator is characterized in that: the upper-layer superconducting resonator structure comprises a continuous main strip line, one or more external microstrip lines and one or more switches; one or two ends of the main strip line form an interdigital coupled structure with the one or more external microstrip lines; the interdigital coupled structure is formed by intersecting the port comb crotch structure of the main strip line and the port comb crotch structure(s) of the one or more external microstrip lines, and the port comb crotch structures of the main strip line and the one or more external microstrip lines do not contact each other; the external microstrip lines are grounded through the switches; and the grounding state, off state or state combinations of the one or more external microstrip lines are controlled by the one or more switches to change the resonance frequency of the resonator. The variable frequency superconducting microstrip line resonator has the advantages of high quality factor, wide variable frequency range, a great number of variable frequency points and frequency control accuracy, is easily made, and can be used for designing and manufacturing high-performance variable frequency band-pass, band elimination, high-pass, low-pass and multi-band superconducting filters.

The present invention discloses a cavity resonator based on a deformable high-temperature superconducting material. The cavity resonator includes a resonator cavity, and the deformable high-temperature superconducting material is attached on the circuit structure surface of the resonator cavity in a completely covering manner and electrically connected with each other to form a superconducting resonator cavity. The deformable high-temperature superconducting material realizes electrical connection through adhesion by a conductive adhesive or/and soldering. The cavity resonator and filter based on the deformable high-temperature superconducting material have the following advantages of realizing the cavity superconducting filter by introducing the deformable high-temperature superconducting material in an existing cavity filter/resonator, designing a tuning structure that can adjust the internal size of the resonator cavity by utilizing the characteristics of processing easiness and breaking difficulty of the deformable high-temperature superconducting material, providing a new tuning mode for the cavity superconducting resonator/filter, reducing the designing difficulty of the resonator and the processing precision requirement of the resonator, and meanwhile, solving the using stability problem of the products after tuning by setting a frequency difference between a designed circuit and a target circuit when the circuit is designed.

A method of tuning a high temperature superconductor (HTS) resonator includes the steps of providing a HTS inductor and a HTS capacitor, the HTS capacitor being electrically connected to the HTS inductor. A tuning body is provided adjacent to the HTS inductor and the HTS capacitor. The relative position of the tuning body with respect to the HTS inductor and the HTS capacitor is altered so as to tune the resonator. A tunable resonant circuit is provided that includes a substrate having a planar surface. At least one resonator formed from HTS material is disposed on the substrate, the resonator having one or more turns that when combined, turn through greater than 360°.

TM0i0 mode (i = 1, 2, 3 ...) planar high temperature supercondutor resonators useful in high temperature superconducting filters, filter banks and multiplexers comprise a shaped high temperature superconductor film and a high temperature superconductor ground plate deposited on opposite sides of a dielectric substrate, wherein the shaped high temperature superconductor film has an aperture in the center thereof and has a shape selected from the group consisting of circles and polygons.

A device and method for improving the efficiency of RF systems having a Reflective Load. In the preferred embodiment, Reflected Energy from a superconducting resonator of a particle accelerator is reintroduced to the resonator after the phase of the Reflected Energy is aligned with the phase of the Supply Energy from a RF Energy Source. In one embodiment, a Circulator is used to transfer Reflected Energy from the Reflective Load into a Phase Adjuster which aligns the phase of the Reflected Energy with that of the Supply Energy. The phase-aligned energy is then combined with the Supply Energy, and reintroduced into the Reflective Load. In systems having a constant phase shift, the Phase Adjuster may be designed to shift the phase of the Reflected Energy by a constant amount using a Phase Shifter. In systems having a variety (variable) phase shifts, a Phase Shifter controlled by a phase feedback loop comprising a Phase Detector and a Feedback Controller to account for the various phase shifts is preferable.

The invention discloses a high-temperature superconductivity resonator and a balance filter formed by the same. The resonator comprises a substrate, a high-temperature superconductivity film formed on the substrate, and a circuit pattern formed by the high-temperature superconductivity film. The resonator is characterized in that the circuit pattern forms a microstrip line resonator, the microstrip line resonator is composed of a straight line section located in the middle and bent sections located at the two ends of the straight line section, and bent section circuits located at the two ends of the straight line section are distributed symmetrically about the perpendicular bisector in the length direction in a plane of the straight line section. Multiple curves are loaded at the tail end of the resonator, small design of a balanced type superconductivity filter is achieved, and the size of the resonator and the size of the filter constructed by the resonator are effectively reduced; meanwhile, the problems that when a traditional balance filter difference module carries out transmitting, the insertion loss is large, and common-mode rejection is not enough are solved; the filter has the advantages of being small, easy to integrate, small in difference module insertion loss and large in common mode rejection.