88 results about "Permittivity" patented technology

The present disclosure provides a protective enclosure for electronic systems. The enclosure comprises a polymer-containing matrix and a metamaterial incorporated into the matrix. The metamaterial is tuned to a specific permittivity or permeability to absorb or reflect a particular frequency. The protective enclosure may be used to create a safe inner environment for electronic components while facilitating uninterrupted wireless communications to / from the outer environment. Additionally, the protective enclosure may be used to protect against electromagnetic interference. In particular, shielding metamaterials are configured individually or in combination to specifically shield (via reflection, absorption, etc.) against relatively wide bands of electromagnetic frequencies, while transparent metamaterials are configured specifically to pass electromagnetic signals within narrow bands of frequencies. This new approach resolves and vastly improves current shield solutions, such as Faraday cages. For example, tuned metamaterials may be configured across a variety of preconfigured frequencies, and can be constructed of lightweight materials.

A semiconductor device includes: a filter circuit including: a resistor; a MOS capacitor; and a MOM capacitor stacked on at least one of the resistor or the MOS capacitor, wherein the following inequalities are satisfied:Mc≥β−γ / β+γ×Mr Mr≤√{square root over (1 / 2πftαβ)}  [Math. 1]where ft denotes a cutoff frequency of the filter circuit, Mr denotes a resistor area of a resistor-provided region in which the resistor is provided, Mc denotes a MOS capacitor area of a MOS capacitor-provided region in which the MOS capacitor is provided, α denotes a resistivity of the resistor, β denotes a MOS capacitance rate of the MOS capacitor, and γ denotes a MOM capacitance rate of the MOM capacitor.

A method includes introducing a first material component having a first permittivity and a second material component having a second permittivity to a mixing unit. The first and second material components are advanced through the mixing unit at a mixing ratio to form a material component mixture that is dispensed from the mixing unit. A third permittivity of the material component mixture, which is related to the first permittivity, the second permittivity, and the mixing ratio, is determined. The third permittivity is compared to a predetermined permittivity, which is related to the first permittivity, the second permittivity, and a predetermined mixing ratio. If the third permittivity differs from the predetermined permittivity by a threshold limit or more than the threshold limit, a corrective response is generated.

Provided is a method to prevent interference between electrodes that causes pixel defects in a pixel defining layer, thereby lowering the touch defect rate of the panel, and implementing a coloring pattern with high optical density on the electrode substrate to not only make the colors vivid but also increase the reliability and lifespan of the display, particularly a composition and a method for forming a pixel defining layer pattern, which comprises a colorant, and the coating film formed by treating at high temperature during post-baking treatment has a high optical density (OD) per thickness, has a low permittivity of 5.0 or less even with changes in measured Hz, and can improve visibility and contrast.

The present invention discloses a microfluidic differential microwave sensor based on OCSRR and its design method, which at least includes a measurement unit and a reference unit. The measurement unit and the reference unit adopt the same structure, and measurement OCSRR particles and reference OCSRR particles are respectively arranged therein. Among them, the measurement unit is used to generate a first signal according to the fluid under test flowing through it, and the reference unit is used to generate a second signal according to the reference fluid flowing through it. The first signal and the second signal are used to characterize the reflection characteristics of the OCSRR particles, and then the sensing information is obtained through the differential information of the two to extract the complex permittivity of the liquid sample. By testing the sensor designed by the present invention, the experimental results are in good agreement with the simulation results. Compared with the existing similar sensors, this sensor can suppress the influence of environmental factors, and the average sensitivity is as high as 0.88%.

The invention discloses an HFSS-based auxetic structure wave-absorbing material simulation method and system, and relates to the technical field of electromagnetic wave absorbing materials, and the method comprises the steps: obtaining the effective dielectric constant and magnetic conductivity of a to-be-simulated wave-absorbing material; based on the effective dielectric constant, the magnetic conductivity and preset auxetic structure parameters, establishing a multilayer auxetic structure simulation model of the to-be-simulated wave-absorbing material on an HFSS simulation platform; constructing an air box model for simulating an external environment on the HFSS simulation platform; and based on preset simulation parameters, solving, optimizing and simulating the multilayer auxetic structure simulation model in the air box model through an HFSS simulation platform to obtain a reflection loss value of the to-be-simulated wave-absorbing material. The technical problem that an existing wave-absorbing material is difficult to consider the wave-absorbing performance and the mechanical performance at the same time is solved.

A surface acoustic wave resonator comprising a multilayer piezoelectric substrate including a layer of piezoelectric material, and interdigital transducer (IDT) electrodes disposed on the layer of piezoelectric material, the IDT electrodes including a first and second bus bars, a first plurality of electrode fingers extending from the first bus bar toward the second bus bar, and a second plurality of electrode fingers extending from the second bus bar toward the first bus bar and interleaved with the first plurality of electrode fingers in a central region of the resonator, gap regions defined between tips of the first plurality of electrode fingers and the second bus bar and between tips of the second plurality of electrode fingers and the first bus bar, regions of piezoelectric material forming the layer of piezoelectric material in the gap regions having a lesser permittivity and / or piezoelectricity than the piezoelectric material in the central regions.

The present disclosure relates to the technical field of thin film material performance detection, and provides a method and system for testing complex permittivity of epitaxial thin film material in a terahertz frequency band, which comprises the following steps: performing transmission type testing on different transmission regions obtained by dividing a to-be-tested epitaxial thin film material sample and air, to obtain a time-domain waveform of a terahertz pulse transmission electric field; performing Fourier transform on the obtained time-domain waveform to obtain an amplitude spectrum and a phase spectrum of the electric field; calculating a complex refractive index of a substrate material according to the amplitude spectrum and the phase spectrum; constructing a transmission and reflection model for the substrate plus the epitaxial thin film material by taking into account multiple reflections inside the substrate material; obtaining a relationship between the complex permittivity of the epitaxial thin film material and the complex refractive index of the substrate material based on the transmission and reflection model, and inversely calculating the complex permittivity of the epitaxial thin film material. In the process of testing the complex permittivity of the epitaxial thin film material, the testing error introduced by multiple reflections inside the substrate material is taken into account, thereby improving the testing accuracy of the complex permittivity of the material.

Provided is a band-pass filter sheet characterized in that: a first dielectric layer, a metal layer, and a second dielectric layer are laminated in this order starting from the radio wave entry surface side; a mesh structure in which the metal layer is formed in a thin film shape and / or a plurality of closed loop structures which are arranged in a matrix is / are provided; and the thickness D of the first dielectric layer and the second dielectric layer is provided by expression (1). Expression (1): D=λ / 4√ε±20% (where λ = the center wavelength of electromagnetic waves and ε = the permittivity of the dielectric layer)

A method of conical anisotropic rigorous coupled wave analysis for grating and a computing device are disclosed. The method includes: obtaining a target geometric phase δ′g for the anisotropic-material-based grating; obtaining a slow axis azimuth angle ϕc(x) of the anisotropic-material-based grating according to the target geometric phase δ′g; obtaining a permittivity tensor of the anisotropic-material-based grating, wherein the anisotropic-material-based grating has an ordinary index no and an extraordinary index ne, the anisotropic-material-based grating has a slow axis polar angle θc and slow axis azimuth angle ϕc(x), and the permittivity tensor is based on no, ne, θc and ϕc(x); applying the permittivity tensor into Maxwell equations; obtaining electromagnetic field for the anisotropic-material-based grating by using boundary conditions of at least two layers or sublayers of the anisotropic-material-based grating to obtain a diffraction efficiency for the anisotropic-material-based grating.

Electric fields are used to determine electrical characteristics of an object, such as permittivity. A dielectric substrate (101, figure 1) has first and second surfaces, with a first set 116, 117, 11

The present invention achieves an electromagnetic wave absorbing sheet which has a plurality of electromagnetic wave absorption bands in a high frequency band from hundreds of GHz to a terahertz band, and in which each electromagnetic wave absorption band has a large band width. Provided is an electromagnetic wave absorbing sheet in which a first dielectric layer, a resistive layer, a second dielectric layer, and a reflective layer are layered successively starting from an electromagnetic wave entry surface side, wherein when the permittivity of the first dielectric layer is represented as ε1, the thickness thereof is represented as D1, the permittivity of the second dielectric layer is represented as ε2, and the thickness thereof is represented as D2, the following expression (1) and expression (2) are satisfied with regard to the center wavelength λ of electromagnetic waves.　Expression (1): D1=5λ / 4√ε1±20% Expression (2) D2=5λ / 4√ε2±20%

This in-waveguide metasurface-structured antenna comprises: a waveguide which has an opening at an end thereof, and of which the width of the rectangular or circular perimeter gradually decreases from the end thereof; and a metamaterial antenna which has a 3D stacked structure, is provided inside the waveguide, and has negative (-) permittivity and permeability in a particular frequency band.

A semiconductor chip device includes a substrate with a first dielectric material of a first permittivity value. A power input line and ground line are positioned in the substrate and arranged to form a decoupling capacitor. A region of the substrate in between the power input line and the ground line is doped with a second dielectric material of a second permittivity value that is higher than the first permittivity value. The region doped with the second dielectric material lacks a signal body. By incorporating a region with higher permittivity, in what is generally unused space for power delivery, the region becomes a decoupling capacitor for nearby power delivery elements. By adding decoupling capacitance to the previously unused space, noise in a circuit is more easily controlled and the chip device becomes more reliable.

The application discloses a physical neural network-based electrical property tomography method, which spatially obtains permittivity and conductivity of all points through four steps.The application does not need to simplify the core equation of MR-EPT to solve, and does not need to use a numerical method to solve by discretizing the derivative of the dielectric property in space, thereby avoiding the discretization error, so that the application has higher precision in obtaining the permittivity and the conductivity.The physical neural network-based electrical property tomography method uses a neural network to construct a mapping relationship between a transmit field and its spatial derivative and electrical properties, so that the precision of the obtained result is higher.

Semiconductor device comprising: a gate electrode (20); a semiconductor layer (50) including a source region (50S) and a drain region (50D), the gate electrode (20) being provided therebetween along a lateral direction (X); Contact plugs (60S, 60D) provided on the source region (50S) and the drain region (50D); first metals (M1) stacked on the respective contact plugs (60S, 60D); a first low-permittivity region (70) provided in at least one region located between the first metals (M1) in a direction in the plane of the semiconductor layer (50) and below a lower surface of the first metal (M1) in a stacking direction (Z) of the semiconductor layer (50), wherein the first region (70) is arranged in direct extension along the stacking direction (Z) of the semiconductor layer (50) with respect to a center of the gate electrode (20) along the lateral direction (X); and a second low-permittivity region (71) provided in at least one region located between the contact plugs (60S, 60D) and having the surface orientation of the plane of the semiconductor layer (50) and, starting from the semiconductor layer (50), in the stacking direction below the first low-permittivity region (70), wherein the second low permittivity region (71) is provided, in plan view, in a planar region that is at least partially different from a planar region provided with the first low permittivity region (70), and wherein a width (W70) of the first region (70) is smaller than a width of the second region (71).

A detection device includes an electromagnetic wave transmitter, configured to emit an electromagnetic wave signal; a beam splitter, positioned in an transmission path of the electromagnetic wave signal, configured to divide the electromagnetic wave signal into a first electromagnetic wave signal and a second electromagnetic wave signal; an adjustable delay line, placed in an transmission path of the first electromagnetic wave signal, configured to adjust a path of the first electromagnetic wave signal; a sample holder, positioned in an transmission path of the second electromagnetic wave signal, configured to hold a sample to be tested; and an electromagnetic wave receiver, configured to receive the first electromagnetic wave signal passing through the adjustable delay line and the second electromagnetic wave signal passing through the sample holder, to generating an interference signal.

The present disclosure provides a protective enclosure for electronic systems integrating two key components: a preconfigurable polymer matrix and a tunable metamaterial. The polymer matrix forms a lightweight, structurally robust foundation with excellent mechanical properties and design flexibility, configurable for specific application requirements. Integrated within this matrix is a highly adaptable metamaterial system, precisely tunable to interact with electromagnetic energy in customized ways. By adjusting its permittivity and permeability, the metamaterial can selectively repel or absorb specific frequencies of electromagnetic radiation, allowing targeted shielding against harmful interference while permitting desired communication signals to pass through. This integration overcomes limitations of traditional electromagnetic shielding approaches, offering enhanced design flexibility and customization for various electronic applications. The use of carbon nanoparticles enables fine-grained control over the metamaterial's electromagnetic properties, creating protective enclosures that effectively manage electromagnetic energy while remaining lightweight and mechanically robust.

A metamaterial system comprises a metamaterial having a multiplicity of structures made of a first material distributed to form a periodic pattern within a bulk made of a second material. One of the first and the second materials is metallic and the other one of the first and the second materials is dielectric. The system optionally and preferably comprises a magnetic field source forming a magnetic field within the metamaterial, wherein the magnetic field is selected to ensure that an electrical permittivity of the metamaterial is negative.

The disclosure relates to a sensor for a quantity of a medium, such as the permittivity of the medium. This sensor comprises at least one sensitive element capable of: injecting waves, the injection being controlled by the application of an input signal, and collecting received waves, perturbed by physical properties of the medium related to said quantity, to form an output signal having, with respect to the input signal, a modulation from which a measurand indicative of said quantity of the medium is determined. The sensor also comprises a control unit capable of generating said input signal with a wave frequency to be injected corresponding to a chosen excitation frequency, and a processing unit applying a demodulation of the output signal to determine the corresponding measurand. In particular, the processing unit is configured to cooperate with the control unit to generate the input signal.The excitation frequency is adjusted according to the input and output signals using a feedback loop within the processing unit. This maintains a linear response of the output signal over a range of measurands by continuously adjusting the excitation frequency. The feedback loop is thus configured to ensure constant sensor sensitivity over this range. (See Figure 4 for an abstract diagram.)

A method to detect the presence and or concentration of an analyte in the environment of a spoof plasmon sensor having the steps of: providing a spoof plasmon sensor into an environment; interrogating said spoof plasmon sensor with an electromagnetic signal; collecting a modified electromagnetic signal from the spoof plasmon sensor; and analyzing the modified electromagnetic signal to detect an analyte in the environment of the sensor. A spoof plasmon sensor for detecting an analyte having a substrate with a superior surface; and a conductive material disposed on said superior surface, said conductive material defining a waveguide having a dual tapering shape, wherein said waveguide defines spoof plasmon cavities which are exposed substrate, where said substrate is configured to change in permittivity when contacted by an analyte.

Electric fields are used to determine electrical characteristics of an object, such as permittivity, by energising selected electrodes and monitoring remaining electrodes. A dielectric substrate (101,

An apparatus and method for improving the precision of measuring the permittivity of a sample material. The apparatus for improving the precision of measuring the permittivity of a sample material comprises a voltage-controlled crystal oscillator, a modulation synthesizer, an amplitude stabilization module, a resonant cavity module, a microwave frequency multiplication module and a processor; the voltage-controlled crystal oscillator is used for outputting a first signal of a preset frequency, and separately transmitting to the modulation synthesizer, the microwave frequency multiplication module and the processor the first signal as an external reference signal thereof; the modulation synthesizer is used for receiving the first signal, using the first signal as an external source, and generating an FSK signal on the basis of a control instruction of the processor, the center frequency of the FSK signal being x.****MHz, and x being an odd number less than 10; the amplitude stabilization module is used for receiving the FSK signal output by the modulation synthesizer and measuring the amplitude, so as to output a frequency signal of a stable amplitude to the microwave frequency multiplication module.

A new LC medium exhibits a ferroelectric-nematic phase at ambient temperature. It comprises at least one or more compounds selected from each of the groups of formula IA, IB and IC-1 / IC-2 / IC-3, wherein the variable groups have the meanings indicated in the text and claims. The mixture can be used in electro-optics, electronics, electromechanics and other applications for materials with very high dielectric permittivity and other energy saving applications.

The invention relates to the technical field of harmonic suppression, and discloses a load harmonic suppression method and system for a remote micro-grid, and the method comprises the steps: analyzing the stator flux linkage data of a motor in the remote micro-grid to determine a filtering parameter and SVG reactive data, analyzing the SVG reactive data to obtain a DC side capacitor, and carrying out the electromagnetic torque simulation. Generating stator flux linkage response data and determining a response speed; determining permittivity parameters according to the direct-current side capacitance, and calculating a damping coefficient in combination with the response speed and a preset model; carrying out harmonic suppression processing on the voltage transient data based on the damping coefficient, and if the suppression effect does not reach the standard, decomposing the voltage transient data to optimize SVG impedance matching parameters; extracting an angle deviation in the voltage transient data to determine the switching frequency of the converter valve, further constructing an electromagnetic torque ripple response model to optimize SVG reactive data, and generating a load harmonic suppression strategy in combination with optimized filtering parameters and the switching frequency; and the voltage stability and the electric energy quality of the independent micro-grid in the remote area are improved.

The disclosure relates to a housing structure (1) for a radar apparatus of a vehicle. The housing structure (1) includes a radiation window (2) formed at least partially or regionally from a plastic material. A material permittivity and a dielectric constant of the plastic material of the radiation window (2) are selected such that electromagnetic waves transmitted from and / or received by the radar apparatus can pass through the radiation window (2) at least nearly undamped, and in particular with a damping of max. 6 dB in a single pass. The housing structure (1) includes a frame region (3) surrounding the radiation window (2), in which a heating apparatus (4) is integrated, wherein fillers are embedded in the plastic material of the radiation window (2), which increase a thermal conductivity of the plastic material of the radiation window (2).

The present disclosure provides a protective enclosure for electronic systems integrating two key components: a preconfigurable polymer matrix and a tunable metamaterial. The polymer matrix forms a lightweight, structurally robust foundation with excellent mechanical properties and design flexibility, configurable for specific application requirements. Integrated within this matrix is a highly adaptable metamaterial system, precisely tunable to interact with electromagnetic energy in customized ways. By adjusting its permittivity and permeability, the metamaterial can selectively repel or absorb specific frequencies of electromagnetic radiation, allowing targeted shielding against harmful interference while permitting desired communication signals to pass through. This integration overcomes limitations of traditional electromagnetic shielding approaches, offering enhanced design flexibility and customization for various electronic applications. The use of carbon nanoparticles enables fine-grained control over the metamaterial's electromagnetic properties, creating protective enclosures that effectively manage electromagnetic energy while remaining lightweight and mechanically robust.

The present invention is provided with a filter circuit (104) having resistors (201a, 201b), MOS capacitors (202a, 202b), and an MOM capacitor (203) laminated on the resistors (201a, 201b) or / and the MOS capacitors (202a, 202b). Given the cutoff frequency of a filter circuit (104) is ft, the resistance area of a resistance formation region (600) in which resistors (201a, 201b) are formed is Mr, the MOS capacitance area of an MOS capacitance formation region (500) in which MOS capacitors (202a, 202b) are formed is Mc, the resistivity of the resistors (201a, 201b) is alpha, the MOS permittivity of the MOS capacitors (202a, 202b) is beta, and the MOM permittivity of the MOM capacitor (203) is gamma, # imgabs0 # is satisfied.

Method for determining a permittivity spectrum of a transmission line, the method comprising the steps of: Obtaining (301) a frequency reflectogram for a transmission line, Determining (303), from the frequency reflectogram, an estimate of the transfer function of the transmission line, Calculating (304, 305), from the phase of the transfer function, the real and / or imaginary part of a permittivity spectrum. Figure 3

An electrolyte additive for a lithium rechargeable battery, having a permittivity of 1.0 F / m or less and represented by the following formula 1 is provided:A is carbon or silicon, and R1 and R2 can be various substituted or unsubstituted alkyl, heteroalkyl, cyclic, or aryl groups. The compound can exhibit a LUMO of −0.6 eV or higher and a HOMO of −6.8 eV or higher. Also provided is an electrolyte containing the additive, a LIFSI salt, and a main solvent comprising either an ether or a fluorine-substituted sulfamoyl, in a ratio of about 0.99:0.01 to about 0.95:0.05. A lithium rechargeable battery incorporating this electrolyte together with positive and negative electrodes and a separator, demonstrates enhanced performance and stability.