10 results about "Cylindrical resonator" patented technology

The present invention relates to an in-operando and non-destructive testing system (10) for testing the aging of at least one electrochemical element of a battery, the in-operando and non-destructive testing system (10) comprising: - a cavity (30); - a source (24) configured to emit L-band electromagnetic waves toward the cavity (30), the cavity (30) comprising a cylindrical resonator (38) with a circular base and having at least one longitudinal cut-out (46, 48); - a detector (28) capable of detecting the waves originating from the cavity (30); and - a processor (34) capable of analyzing the waves detected by the detector (28) in order to obtain at least one item of information relating to the aging of the at least one electrochemical element.

System and method for non-destructive monitoring of the aging of a battery in operation. The present invention relates to an in-operando, non-destructive monitoring system (10) for the aging of at least one electrochemical element of a battery. The in-operando, non-destructive monitoring system (10) comprises: - a cavity (30), - a source (24) configured to emit L-band electromagnetic waves towards the cavity (30), the cavity (30) comprising a cylindrical resonator (38) with a circular base having at least one longitudinal cutout (46, 48), - a detector (28) adapted to detect the waves emanating from the cavity (30), and - a computer (34) adapted to analyze the waves detected by the detector (28) to obtain at least one piece of information relating to the aging of at least one electrochemical element. Figure for the abstract: Figure 1

Provided is a glass fabric formed by weaving warp and weft glass yarns comprising a plurality of glass filaments, wherein the surface of the glass fabric is subjected to surface treatment with a surface treatment agent, and the difference between the dielectric loss tangent and the bulk dielectric loss tangent of the glass fabric as measured by using a split cylinder resonator is greater than 0 and not more than 1.0×10−3 at 10 GHz.

Provided is a glass cloth woven with glass yarns containing a plurality of glass filaments as warp and weft, wherein the surface of the glass cloth is treated with a surface treatment agent, and the difference between the dielectric loss tangent of the glass cloth and the bulk dielectric loss tangent measured using a split cylindrical resonator at 10 GHz exceeds 0 and is 1.0×10 ‑3 the following.

An object of the present disclosure is to provide a glass cloth that can improve skew in printed wiring boards and has excellent productivity and resin impregnation properties. [Solution] This disclosure provides a glass cloth constructed with warp and weft yarns made of glass yarns consisting of a plurality of glass filaments. The glass cloth has a thickness in the range of 26 to 36 μm, with warp and weft widths in the ranges of 211 to 300 μm and 326 to 400 μm, respectively, or a thickness in the range of 42 to 58 μm, with warp and weft widths in the ranges of 267 to 385 μm and 425 to 550 μm, respectively. The coefficient of variation of the dielectric constant of the glass cloth at 10 GHz, measured using a split cylinder resonator, is 8.0% or less.

The invention relates to a method and an apparatus for performing a plasma chemical vapour deposition process. The apparatus comprises a mainly cylindrical resonator being provided with an outer cylindrical wall and an inner coaxial cylindrical wall defining therebetween a resonant cavity that is operable at an operating frequency. The resonant cavity extends in a circumferential direction around a cylindrical axis of the inner and outer cylindrical wall. Further, the outer cylindrical wall includes an input port connectable to an input waveguide. In addition, the inner cylindrical wall includes slit sections extending in a circumferential direction around the cylindrical axis. A greatest dimension defining the aperture of the slit sections is smaller than half the wavelength of the operating frequency.

The present disclosure provides an insulating material capable of achieving both sufficiently high heat dissipation and sufficiently low dielectric loss tangent permittivity. Specifically, the composition contains (a) a specific olefin-aromatic vinyl compound-aromatic polyene copolymer and (b) boron nitride particles, and is characterized in that: the volume ratio of the component (a) to the component (b) is in the range of 98-15: 2-85; the value of the dielectric loss tangent of a cured body of the composition as determined by a split cylinder resonator method at a measurement frequency of 35-42 GHz is 2 * 10 <-3 > or less, and the thermal conductivity of the cured body of the composition as determined by a laser flash method at 23 DEG C is 0.6 [W / m * K] or more.

The application provides a dielectric property testing system and method based on a split fan-shaped resonant cavity, and belongs to the technical field of microwave testing. Different from the structure of an existing split cylindrical resonator, the application adopts a split fan-shaped cylindrical resonant cavity, and cuts a slit on the edges of two surfaces of the split resonator to suppress a spurious mode, so that complete suppression of the spurious mode near the working mode is realized, a relatively pure TE 0n1 mode spectrum is obtained in a wide frequency range, and the single resonant cavity can realize measurement of TE 011 -TE 081 eight modes. In addition, the sample testing area of the resonant cavity is less than one fifth of a traditional cylindrical cavity, so the size of the corresponding sample to be tested is also reduced by less than one fifth, and the processing cost of the sample to be tested can be effectively reduced.

The invention discloses a solid fluctuation localization inertial navigation gyroscope capable of inhibiting defects. The solid fluctuation localization inertial navigation gyroscope comprises a gyroscope base, piezoelectric electrodes, a circuit board, a sealing cover, a cylindrical harmonic oscillator, a top cover, a supporting structure and a transmission structure, the cylindrical harmonic oscillator is installed above the circular truncated cone through a supporting structure and a transmission structure. The top cover is arranged at the upper end of the cylindrical harmonic oscillator; the cylindrical harmonic oscillator comprises a resonance ring and a rib ring assembly, the resonance ring is a cylinder, a through hole is formed in the middle of the resonance ring, and internal threads are arranged at the upper end and the lower end of the through hole and used for being detachably connected with the top cover and the transmission structure; the rib ring assembly is of a cylindrical shell structure with a circular groove and is connected to the top of the resonance ring in a sleeving mode through the circular groove, annular ribs are periodically arranged on the outer wall of the rib ring assembly, and the annular ribs are symmetrically distributed from the middle of the resonance ring to the two sides of the resonance ring. The resonance ring on the inner side is used for rotating and vibrating and compensating mass distribution, and the rib ring assembly on the outer side is used for restraining working mode phase deviation and characteristic frequency splitting decomposition caused by mass concentration.

The application relates to the technical field of resonant cavities, in particular to a powder material dielectric property separation type cylindrical resonant cavity based on a quasi-optical cavity, which comprises a box body, an upper cavity, a sample bin and a lower cavity are arranged in the box body, the upper cavity is in a cylindrical structure, the material of the sample bin is flexible polytetrafluoroethylene, magnetic attraction points are respectively arranged on the top and the bottom of the sample bin, the top of the sample bin is magnetically connected with the upper cavity, and the bottom of the sample bin is magnetically connected with the lower cavity; the lower cavity is in a cylindrical structure, a heat insulation sleeve is arranged on the surface of the lower cavity, and a wave-absorbing material layer is attached to the inner wall of the lower cavity; the diamond coating has superhard characteristics and extremely low surface roughness, can significantly reduce the scattering loss of electromagnetic waves on the inner wall of the cavity, can quickly dissipate the heat generated by electromagnetic energy in the cavity, and can inhibit the influence of temperature fluctuation on the Q value; the cavity is divided into three parts, i.e. an upper part, a middle part and a lower part, and is connected through the magnetic attraction points to form a modular quasi-optical cavity, and in combination with the wave-absorbing material layer and high-precision processing, single-mode purity can be realized.