121 results about "Split-ring resonator" patented technology

A disclosed construction structure unit may include at least one split-ring resonator, which may be embedded within a material. The split ring resonator may be formed from a three-dimensional (3D) monolithic carbonaceous growth and may detect an electromagnetic ping emitted from a user device. The split ring resonator may generate an electromagnetic return signal in response to the electromagnetic ping. The electromagnetic return signal may indicate a state of the material in a position proximate to a respective split ring resonator. In some aspects, the split-ring resonator may resonate at a first frequency in response to the electromagnetic ping when the material is in a first state, and may resonate at a second frequency in response to the electromagnetic ping when the material is in a second state. A resonant frequency of the 3D monolithic carbonaceous growth may be based on physical characteristics of the material.

An infusion pump assembly is disclosed. The infusion pump assembly includes a reservoir for receiving an infusible fluid, a pump assembly for pumping a quantity of infusible fluid from the reservoir to an exit, a first valve assembly configured to selectively isolate the pump assembly from the reservoir, a second valve assembly configured to selectively isolate the exit from the pumping assembly, and a split ring resonator antenna having a resonant frequency comprising a plurality of planar metallic layers.

The invention belongs to the technical field of antennas, and particularly relates to an ultrathin full-space metasurface unit with dual-band amplitude-phase regulation and control and a multi-beam generator. In order to solve the problems that component design cost is high, unit amplitude is low, and incident wave energy cannot be efficiently regulated and controlled, the full-space metasurface unit comprises a first metal layer and a second metal layer, the first metal layer is located above the second metal layer, a dielectric plate is arranged between the first metal layer and the second metal layer, and the dielectric plate is located between the first metal layer and the second metal layer. A first C-shaped groove and a double split ring resonator are etched on the first metal layer from outside to inside in a hollowed-out manner, a second C-shaped groove and an elliptical groove are etched on the second metal layer from outside to inside in a hollowed-out manner, and the opening directions of the first C-shaped groove and the second C-shaped groove are perpendicular to each other. And the multi-beam generator is designed based on the total space metasurface unit.

The invention discloses a flexible sensor for synchronously monitoring multiple parameters of respiration and heartbeat as well as a preparation method and application thereof, and relates to the technical field of sensors. The flexible sensor comprises a respiration sensing layer which comprises a bottom layer and a plurality of split-ring resonators distributed in an array; the heartbeat sensing layer is arranged on the respiration sensing layer and comprises a middle layer and a plurality of cross-shaped resonance units distributed in an array mode, and the array center of the cross-shaped resonance units and the array center of the split-ring resonators are arranged in a staggered mode; and the packaging layer is arranged on the heartbeat sensing layer and is provided with a plurality of through holes. According to the invention, a double-layer unit differentiation layout is adopted, the outer-layer SRR resonant frequency (breathing dominant frequency band) and the inner-layer cross-shaped resonant unit resonant frequency (heartbeat dominant frequency band) realize physical signal separation through frequency interval, complex algorithm decoupling is not needed, and breathing and heartbeat multi-parameter synchronous monitoring is realized.

The invention discloses a metasurface unit based on electromagnetic physical dimension joint encryption, a metasurface and a holographic encryption method, and relates to the technical field of metasurface encryption. The invention aims to solve the problem that the existing secret sharing encryption strategy limits the information capacity and endangers the security of secret information. The metasurface unit comprises a substrate, a split ring resonator and an open slot resonator, wherein the split ring resonator and the open slot resonator are located on the substrate. A plurality of metasurface units which are closely arranged in a rectangular array form a metasurface. Encrypting the to-be-encrypted image by using a chaos algorithm to generate a chaos sequence; performing XOR operation on a to-be-encrypted image and the chaos sequence to generate a ciphertext image; an incident polarization key, a system security key and a ciphertext image are simultaneously coded to different physical dimensions of a metasurface through amplitudes and phases, so that the password image and the key are embedded into four amplitude and phase channels of electromagnetic waves at different spatial positions at two different working frequencies when different polarization incidence is carried out, and encryption is completed.

The invention relates to the technical field of biomedical detection equipment, and provides a small noninvasive blood glucose detection system and method based on frequency shift and amplitude constraint, the small noninvasive blood glucose detection system and method based on frequency shift and amplitude constraint comprises a field programmable gate array (FPGA), a digital-to-analog converter (DAC) and a voltage-controlled oscillator (VCO), the system comprises a double-frequency complementary split-ring resonator (CSRR) sensor, a detector, an analog-to-digital converter (ADC), a liquid crystal display (LCD), a nixie tube and a power supply module for supplying power, after frequency sweeping is completed, the detector output voltage data stored in the RAM is converted into a power value through calculation, the amplitude of the transmission coefficient of the sensor is obtained according to an S21 parameter formula, and the FGPA controls a nixie tube to display the resonant frequency and the resonant depth of the sensor according to a key. The method is mainly applied to design and manufacturing occasions of medical equipment.

The invention discloses a double-frequency phase independent regulation and control metasurface unit and an application method. The metasurface unit comprises a dielectric substrate; the two sides of the dielectric substrate are covered with a first metal layer and a second metal layer respectively. Each of the first metal layer and the second metal layer comprises a metal patch main body and a phase regulation and control structure, the center of the metal patch main body is provided with a circular hollow, and the phase regulation and control structure is arranged in the circular hollow; the phase regulation and control structure of the first metal layer and the phase regulation and control structure of the second metal layer are in 180-degree rotational symmetry; the double-connecting-ring structure is an axisymmetric structure; an open circular split ring resonator is arranged in the double-connecting-ring structure, and an electromagnetic isolating ring group is arranged in the open circular split ring resonator; according to the invention, 360-degree independent phase control on electromagnetic waves at a low-frequency band and a high-frequency band is realized.

An ESA antenna includes a layer of filters between the layer of radiating elements and the ground layer. The filter layer obviates certain post processing steps. The filters define a passband at the operating range of the antenna and a stopband defined to prevent crosstalk or reduce known external interference. Each filter includes alternating cells of a resonator cell formed by two split ring resonators and a resonator cell formed by a complementary split ring resonator and a complementary patch / stub. A particular implementation of the filter defines an operating range around 23 gigahertz with a passband to stopband transition of less than 500 megahertz. Vias may connect the filter layer to a surface component layer with beamforming integrated circuits, bypassing the routing layer.

The invention relates to a high-sensitivity differential microfluid sensor based on a microstrip line, which is used for measuring the concentration of a water-ethanol mixed solution, and comprises the microstrip line configured with a symmetrical shunt / combiner, a pair of split ring resonators with bent grooves, and a microfluid channel, a dielectric layer and a metal ground which are arranged at the tops of the split ring resonators from the top layer to the bottom layer. Wherein the bent groove parts of the two SRRs are areas with the maximum electric field intensity, and a micro-fluidic channel made of polydimethylsiloxane (PDMS) is placed in the areas. A sensor parameter curve is measured by a vector network analyzer (VNA). The suggested size of the sensor is 30 * 20 mm < 2 >, and the working frequency is 4.8 GHz. Experimental results show that the resonant frequency of the water-ethanol mixture with the concentration range of 0-100% has linear shift of 1250 MHz, and the average sensitivity Savf of detection is 0.987%. The sensor has the characteristics of compactness, high sensitivity, high measurement precision, no environmental interference and the like, and has wide application prospects in the fields of biomedical detection, material analysis, environmental monitoring and the like.

The invention discloses a band-pass filter based on an artificial surface plasmon polariton structure and a design method thereof, a metal structure of the band-pass filter comprises an polariton structure region, the polariton structure region is provided with a plurality of plasmon polariton grooves, and the plurality of plasmon polariton grooves are arranged at intervals along a first direction; the depth direction of the plasmon polariton grooves is perpendicular to the first direction, the lengths and the widths of the plasmon polariton grooves are the same, and the multiple plasmon polariton grooves are formed in the same side of the polariton structure; the split resonant rings are arranged on the dielectric substrate, and the multiple split resonant rings are arranged close to the metal structure. Due to the fact that the multiple plasmon polariton grooves formed in the polariton structure and arranged at intervals in the first direction can form the artificial surface plasmon polariton structure, the band-pass filter based on the artificial surface plasmon polariton structure has the high inhibition capacity for harmonic waves of the band-pass frequency, and the band-pass filter based on the artificial surface plasmon polariton structure has the good inhibition capacity for the harmonic waves of the band-pass frequency.

The invention relates to the technical field of antennas, and discloses a folding Cassegrain antenna, a polarization flipping focusing metasurface is located below a frequency-polarization adjustable metasurface, and the distance between the polarization flipping focusing metasurface and the frequency-polarization adjustable metasurface is half of the focal length of the polarization flipping focusing metasurface; the linear polarization feed source is located at the focus of the polarization overturning focusing metasurface and used for radiating y polarization waves; the frequency-polarization adjustable metasurface comprises a plurality of polarization rotation units which are arranged periodically, and each polarization rotation unit comprises a flexible substrate located on the upper layer, two single-opening resonance rings which are etched on the flexible substrate and are opposite in opening direction, and a metal grating located on the lower layer. By folding the flexible substrate, the polarization rotation unit forms a left-handed or right-handed chiral structure, and the technical effects of reconfigurable switching of x-polarized waves, left-handed circularly-polarized waves and right-handed circularly-polarized waves and adjustable central working frequency of the folding Cassegrain antenna can be achieved.

The invention relates to an electromagnetic sensor based on a split-ring resonator array and a crack detection method, the sensor comprises a first flexible dielectric substrate, a bonding layer, a second flexible dielectric substrate and a metal grounding layer which are bonded from top to bottom, and the top surface of the first flexible dielectric substrate is provided with a microstrip transmission line; one end of the first flexible dielectric substrate is provided with an SMA interface hole, and the bottom surface of the first flexible dielectric substrate is provided with a split-ring resonator array which is in electromagnetic coupling with the microstrip transmission line. The invention also provides a crack detection method of the sensor. The electromagnetic sensor is adjustable in detection area and uniform in field distribution.

An antenna device comprises a case and an antenna element. The antenna element is arranged in the case and radiates a radio wave with a predetermined frequency which has a plane of polarization in parallel to a predetermined plane. The case is formed with a predetermined opening. The predetermined opening has two main openings and a coupling opening. The two main openings are apart from each other in a first direction perpendicular to the predetermined plane. The coupling opening couples the two main openings together in the first direction. The coupling opening has a size smaller than another size of each of the two main openings in a second direction perpendicular to the first direction. The predetermined opening forms a split ring resonator which resonates at the predetermined frequency and radiates a radio wave corresponding to the radio wave radiated from the antenna element.

The application provides a controllable attenuator based on a complementary open resonant ring structure, which is composed of a cascaded active gain compensation amplifier and an open resonant low-pass filter. The open resonant low-pass filter comprises a microstrip low-pass filter, a complementary open resonant ring, a variable capacitor and a control circuit. The microstrip low-pass filter is composed of a middle dielectric layer and a first metal surface and a second metal surface located on both sides of the dielectric layer. The complementary open resonant ring is designed on the second metal surface. The variable capacitor is connected in parallel between the inner metal surface and the outer metal surface of the complementary open resonant ring. The capacitance of the variable capacitor is adjusted through the control circuit, so as to control the attenuation amplitude of the controllable attenuator based on the complementary open resonant ring structure. The controllable attenuator based on the complementary open resonant ring structure has a very small volume and can be integrated into a chip.

The invention discloses an isotropic metasurface for ultrasensitive detection of extracellular vesicles. A square unit cell in the isotropic metasurface is composed of a pair of orthogonal I-shaped protruding structures and four C-shaped split ring resonators. The optical metasurface adopts an isotropic metasurface structure design, and the structure shows the same response to x and y polarization incident light and generates isotropic resonance response. An annular dipole with characteristic end-to-end configuration is generated through interaction between the induction magnetic dipoles, and the annular mode is remarkably enhanced. The optical metasurface can be used for carrying out ultra-sensitive detection on extracellular vesicles, the correlation R2 is 0.962, and the LoD of the extracellular vesicles is 5 / mu L.

A system for neuromodulation includes a split-ring resonator (SRR) comprising a resonance circuit, the SRR being implantable in a cranial target site and a source of microwave signals, wherein the microwave signals are deliverable wirelessly to couple with the SRR to produce a localized electrical field, wherein the localized electrical field inhibits one or more neurons at the cranial target site with submillimeter spatial precision.

The present invention discloses a broadband magnetoelectric dipole antenna with second harmonic suppression. The antenna comprises: an antenna feed structure comprising a bottom dielectric substrate, a rod-shaped stripline, and an H-shaped slot. The bottom dielectric substrate is provided with an upper floor and a lower floor, respectively, on both surfaces thereof. The H-shaped slot is etched into the upper floor, and the rod-shaped stripline is disposed within the bottom dielectric substrate. An antenna radiator structure comprises a top dielectric substrate, a main patch disposed on the top surface of the top dielectric substrate, and the main patch is connected to the upper floor via a grounded metal post. An antenna filter structure comprises an open resonant ring, a grounded metal branch, and a feeder branch. The open resonant ring is printed on the top surface of the top dielectric substrate. The grounded metal branch is located within the top dielectric substrate and connected to the upper floor. The feeder branch is printed on the top surface of the bottom dielectric substrate and connected to the rod-shaped stripline. This antenna can achieve second harmonic suppression without increasing the antenna volume and without affecting in-band matching.

The application discloses a kind of based on double-sided spiral wiring and low profile ultra-wideband antenna device of lossy open resonant ring loading, including double-sided spiral antenna structure, lossy open resonant ring structure, metal back cavity and balun, wherein the upper and lower surfaces of double-sided spiral antenna structure are respectively provided with Archimedes spiral arm, and are provided with the metal via hole that is connected with different levels spiral arm;The lossy open resonant ring structure is provided with annular dielectric substrate, and a circle of open resonant ring loaded with resistance is arranged on the upper surface thereof;Double-sided spiral antenna structure is located above the lossy open resonant ring structure, and both are arranged in the metal back cavity;Balun is vertically arranged in the center of metal back cavity, and the top end is respectively connected with the two spiral arms on the upper surface of circular dielectric substrate, and the bottom end is arranged on the bottom surface of metal back cavity and connected with external antenna interface through through-hole.The antenna device with improved structure has ultra-wideband, low profile, high gain, unidirectional radiation and good circular polarization characteristics.

The invention adopts a double-chiral metasurface for independent control of orthogonal circularly polarized electromagnetic waves. A basic unit of the metasurface comprises a metal composite split-ring resonator, a dielectric substrate and a total reflection metal floor, wherein the upper surface of the dielectric substrate is the metal composite split resonant ring, and the lower surface of the dielectric substrate is the total reflection metal floor; the two split-ring resonators of the metal composite split-ring resonator outer ring are symmetrical about the XOZ plane and are in mirror symmetry about the YOZ plane. The two split resonant rings of the inner ring of the metal composite split resonant ring are of an asymmetric structure, a gap between the upper portions of the two split resonant rings is flush with a gap of the outer ring, the lengths of the two split resonant rings are variables, and the two split resonant rings are used for regulating and controlling reflection phases of left-handed and right-handed circularly polarized electromagnetic waves respectively. And 0-360-degree continuous phase regulation and control can be realized, and the design of the dual-circular-polarization metasurface is greatly simplified.

The invention provides a passive broadband non-reciprocal electromagnetic wave absorber and a manufacturing method, and the passive broadband non-reciprocal electromagnetic wave absorber comprises three layers of structures from bottom to top: a bottom layer metal reflection backboard, a ferrite substrate and a metal complementary split ring resonator (CSRR) array. Wherein the bottom metal reflection back plate, the ferrite substrate and the CSRR array are square plate-shaped structures with the same shape, and the ferrite substrate is arranged between the bottom metal reflection back plate and the CSRR array; the ferrite substrate is made of La-doped BaFe12O9, and has an asymmetric magnetic conductivity tensor characteristic; the surface layer of the CSRR array is provided with a metal complementary opening; and the CSRR array is coupled with the non-reciprocal characteristic of the ferrite substrate to form differential absorption of left-hand circularly polarized waves and right-hand circularly polarized waves.

A broadband ring resonator (300, 400, 500, 600, 601) including a substrate, a conductive trace on the substrate comprising a first end and a second end, wherein the conductive trace encloses an interior region except for a gap between the first end and the second end, and at least one radial stub (301, 401, 403, 501, 503, 505, 603, 605, 607, 609, 611, 613) integrated into the conductive trace and a method (700) of enhancing a bandwidth of a split ring resonator including acquiring a substrate, forming a conductive trace on the substrate comprising a first end and a second end, wherein the conductive trace encloses an interior region except for a gap between the first end and the second end, and integrating at least one radial stub (301, 401, 403, 501, 503, 505, 603, 605, 607, 609, 611, 613) into the conductive trace.

A signal transmission control device may include a device layer including a conductive layer and a dielectric layer disposed on the conductive layer, and a conductive line disposed on the dielectric layer and extending across a first inverted split ring resonator (ISRR) and a second inverted split ring resonator (ISRR). The device layer may define the first ISRR and the second ISRR spaced apart from each other, and a signal transmission characteristic between a first end and a second end of the conductive line may be controlled by the first ISRR and the second ISRR.

The invention discloses a broadband MIMO (Multiple Input Multiple Output) antenna array for a closed space, which comprises a plurality of antenna plate main bodies, and the antenna plate main bodies are arranged in an annular array along a side ridge; the antenna plate main body comprises a dielectric substrate and an antenna assembly, and the antenna assembly comprises a metamaterial assembly, a director, an excitation arm, a reflector and a balun module; in the direction from the upper end to the lower end of the dielectric substrate, the metamaterial assembly, the director, the excitation arm and the balun module are sequentially distributed in the middle on the front surface of the dielectric substrate, and the reflector is arranged on the back surface of the lower end part of the dielectric substrate; the metamaterial component, the director and the excitation arm are sequentially arranged at intervals, and the excitation arm is connected with the balun module through a microstrip line. The combination of the linear excitation arm and the bent excitation arm is designed, arc induction current is excited on the director to resonate with the rectangular split-ring resonator, and the Yagi antenna has the advantages of widening the bandwidth of the Yagi antenna and improving the gain of the antenna.

This invention relates to a high-focusing-efficiency planar metal metasurface lens, belonging to the field of microwave lenses. It comprises a dielectric layer, a metal layer, and an aperture ring. Two metal layers cover the two end faces of the dielectric layer. Several aperture rings are spaced apart on the metal layers. The aperture rings are two sets of concentric segmented circular rings with symmetrical double openings, distributed internally and externally. The opening portion of the inner ring is deflected by an angle greater than 0° along the center, causing the segmented circular rings within the aperture ring to be asymmetrically distributed, thereby achieving a focusing efficiency greater than 60% and a magnification of 16 times. This invention has the advantages of achieving high focusing efficiency and high magnification by employing an ultra-thin double-layer metal twisted double-aperture resonant ring metasurface unit and a single dielectric interlayer structure.

The invention discloses a dual-polarization microwave energy efficient receiving composite metasurface array and a receiving method, and the method comprises the steps: enabling different polarization plane waves to irradiate a polarization selective waveform conversion function region composed of biaxial symmetric split-ring resonators, and carrying out the unit differential response and reflection phase gradient arrangement, converting the x-polarized plane wave and the y-polarized plane wave into surface waves propagating in the-x direction and the y direction respectively; the square ring-shaped artificial surface plasmon polariton structure is used for receiving the surface wave, and the surface wave is stably guided to the waveform focusing and energy extraction functional area through momentum matching; by means of gradient refractive index distribution focusing surface waves of a planar semi-Maxwell fisheye lens, an equiphase surface is bent into a spherical surface shape, and energy is converged to a focus; energy is led out through the microstrip line structure at the focus, efficient transmission is achieved through impedance matching, and collection and conversion of different polarization microwave energy are completed. The polarization sensitivity problem of a traditional scheme is solved, and the microwave energy collection efficiency is improved.

The present invention discloses a vertically polarized omnidirectional radiating notch antenna for WLAN, which comprises a dielectric substrate and a coaxial feed cable. A pair of dipoles are printed along the z-axis direction on the upper layer of the dielectric substrate, and a pair of split ring resonators are printed along the y-axis direction. A coplanar waveguide structure is printed on the upper layer of the lower arm of the dipole, and a layer of metal is printed on the lower layer of the lower arm. The inner conductor of the coaxial cable passes through the dielectric substrate and is connected to the upper metal layer of the lower arm of the dipole, while the outer conductor is connected to the lower metal layer of the lower arm. The dipole is fed by the coaxial cable. A metal layer with the same size and shape as the lower part of the upper layer dipole is printed on the lower layer of the dielectric substrate. The planar notch antenna proposed by the present invention can achieve stable omnidirectional radiation characteristics and small circularity. Within the working frequency band, the antenna has high gain and small cross-polarization components in the horizontal plane. It is suitable for omnidirectional coverage WLAN applications that require notch function.

The application discloses a manufacturing method of a graphene back gate electrode terahertz wave modulator, which comprises the following steps: growing and transferring a first layer of graphene; photoetching a graphene back gate pattern; photoetching a back gate electrode pattern and preparing a back gate electrode; growing a medium layer; growing and transferring a second layer of graphene; photoetching a graphene strip pattern and preparing a graphene strip; photoetching an open resonant ring pattern and preparing an open resonant ring metal. The application discloses a terahertz wave modulator, which comprises a high-resistance substrate, a graphene back gate electrode layer and a high-K gate medium layer which are sequentially bonded from bottom to top; the high-K gate medium layer is provided with an array of graphene strips and an open resonant ring metal, the open resonant ring metal is arranged around the graphene strips and is in physical contact with the graphene strips. The application constructs a back gate electrode on a single layer of graphene, thereby getting rid of the absorption of a conductive substrate to terahertz waves and effectively improving the modulation efficiency of the terahertz wave modulator to terahertz waves.

The present invention provides an anti-interference high-order band-stop filtering ultra-wideband antenna. It includes a dielectric substrate carrier, a printed monopole antenna board, a microstrip feeder conductor, a metal floor, and three types of open resonant ring structures on the antenna. The three types of resonant rings are a pair of circular ring-shaped complementary open resonant ring gaps etched on the printed monopole antenna board, two pairs of rectangular complementary open resonant ring gaps etched on the metal floor, and a pair of metal open resonant rings are placed on both sides of the microstrip feeder conductor. The ultra-wideband antenna with high-order band-stop filtering function provided by the present invention effectively improves the anti-interference performance between the ultra-wideband system and the WIFI system through the multi-level distribution of multiple types of resonant rings.

The application discloses a kind of microwave metamaterial high-temperature sensors based on planar waveguide and preparation method thereof, it is related to sensor technical field.The sensor includes: by top to bottom sequentially arranged top metal layer, dielectric substrate and bottom metal layer;Top metal layer integrates single square complementary split ring resonator structure and periodic arrangement of annular complementary split ring resonator structure;Square complementary split ring resonator structure is located at the center position of top metal layer;Annular complementary split ring resonator structure is located at the two sides of top metal layer, and the opening direction in two sides annular complementary split ring resonator structure is opposite.Wherein, dielectric substrate, top metal layer, bottom metal layer and annular complementary split ring resonator structure form planar waveguide, square complementary split ring resonator structure forms resonant loop and carries out wireless signal transmission, the present application can realize wireless passive, real-time in situ, high-quality factor of harsh environment superhigh temperature monitoring.

This device comprises a substrate (101), fine particles (102) dispersed in the substrate (101), and a circuit (103) formed on the surface of the substrate (101). The substrate (101) is composed of a hydrogel which is composed of a hydrophilic material that is edible, and which solates at body temperature. The circuit (103) is, for example, a resonance circuit such as an LCR resonance circuit or a split ring resonator. The circuit (103) can be composed of an electroconductive material that is edible.