54 results about "Split ring resonators" patented technology

A disclosed leaky coaxial resonant sensor system and methods. In use, the system includes at least one split-ring resonator (SRR) embedded within a material of the component. The at least one SRR is formed from a composite material. Additionally, the at least one SRR is configured to resonate at a first frequency in response to an interrogation signal from a leaky coaxial cable antenna. In some aspects, each SRR may resonate at a first frequency in response to an electromagnetic ping when the composite material is in a first state, and may resonate at a second frequency in response to the electromagnetic ping when the composite material is in a second state. A resonant frequency of the composite material may be based on physical characteristics of the composite material.

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 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 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.

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.

A disclosed component 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.

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 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.

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 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.

The utility model discloses an antenna assembly and network equipment, and relates to the technical field of antennas. The integrated level of the antenna is improved, and the antenna assembly is miniaturized. According to the specific scheme, the antenna assembly comprises a first substrate, a second substrate, a first antenna, a second antenna, a first feeder line, a second feeder line and a separator. The first feed end of the first feed line is used for feeding the first antenna, and the vertical projection of the first feed end on the first surface is a first area. The second feed end of the second feed line is used for feeding the second antenna, and the vertical projection of the second feed end on the first surface is a second area. The vertical projection of the separator on the first surface covers one of the first area or the second area. The spacer may be a split ring resonator. Under the condition that the two substrates of the antenna assembly are stacked, high isolation is ensured. The antenna number of the system is reduced through high integration, and the system can be applied to dual-band or three-band multi-link operation, and can be applied to scenes such as FTTR and the like.

The application discloses application of an active double-mode microwave micro-flow sensor to liquid dielectric constant detection. The double-mode resonant unit is formed by a microstrip line and a split ring resonator, and has high and low resonant frequency points. The low-frequency resonant frequency point moves to a low frequency with the increase of the dielectric constant, and the high-frequency frequency point moves to a high frequency with the increase of the dielectric constant, thereby effectively increasing the sensitivity of the passive resonant unit. A negative impedance circuit is embedded at the rear end of the microwave passive sensor to form an oscillator, namely a microwave passive resonator and a radio frequency amplifier, and the oscillation frequency changes with the change of the dielectric constant of the material to be detected, and the change of the dielectric constant is mapped to the change of the oscillation frequency. The relationship between the dielectric constant and the resonant frequency is converted to the relationship between the dielectric constant and the direct current voltage through a demodulation circuit. The application has the advantages of high sensitivity, low price, convenience for carrying, etc., and is a high-performance and low-cost system-level detection device which will play an important role in the detection field of liquid materials.

The invention provides an intracranial pressure sensor based on a split-ring resonator structure, a monitoring system and a monitoring method, and belongs to the technical field of medical instruments. The intracranial pressure sensor is composed of a substrate, an interdigital capacitor-split resonant ring structure and a micro-channel pressure conversion structure. Intracranial pressure acts on the micro-channel film to drive the gallium-indium eutectic alloy to displace, the interdigital capacitance is modulated in real time, resonant frequency deviation is caused, and 0.47 MHz / kPa high-sensitivity pressure monitoring is achieved. The monitoring system comprises an intracranial pressure sensor, an in-vitro radio frequency read-write device and a data processing terminal, and the intracranial pressure can be continuously monitored in real time for a long time. Compared with an existing intracranial pressure detection means, the intracranial pressure sensor based on the split-ring resonator structure, the monitoring system and the monitoring method have the advantages that high sensitivity, high stability, good repeatability and excellent wireless readability are achieved on the basis that an integrated chip is not needed, and a better solution is provided for high-precision minimally invasive intracranial pressure monitoring.

The application discloses a transmissive array antenna with high selective gain filtering characteristics, which comprises a planar transmissive array as a transmissive surface and a horn antenna as a feed source; a 180-degree transmissive phase difference is realized by rotating a feed part of a magnetic electric dipole of the planar transmissive array by 0 degree or 180 degrees around a central axis; the planar transmissive array comprises a plurality of periodically and seamlessly distributed transmissive units, each of which generates a different compensation phase when subjected to a y-polarized incident wave, so as to form a required beam direction; the method is based on a magnetic electric dipole antenna loaded with split ring resonators, can realize higher selectivity under a planar structure, avoids the design of a complex filter part and a higher profile of a three-dimensional structure in an antenna-filter-antenna structure, can be widely applied to long-distance communication, and can more fully utilize limited electromagnetic spectrum.

A broadband ring resonator 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 integrated into the conductive trace and a method 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 into the conductive trace.

The invention discloses a microstrip band-stop filter with a wide upper passband, and relates to the technical field of radio frequency passive devices, and the microstrip band-stop filter comprises an electromagnetic shielding cavity, a dielectric substrate, a microstrip circuit located on the front surface of the dielectric substrate, and a grounding metal layer located on the back surface of the dielectric substrate. The microstrip circuit is composed of an input feeder line, an output feeder line and a four-stage cascade filter network located between the input feeder line and the output feeder line. The stopband center frequencies of the four filtering units are distributed in a staggered manner so as to broaden the stopband bandwidth; each filtering unit is composed of two U-shaped micro-strips and an interdigital capacitor, and symmetrical rectangular split ring resonators loaded with the interdigital capacitors and double-path arc-shaped parallel micro-strip lines are adopted at the interstage connecting positions of the filtering units respectively. According to the invention, the low insertion loss, high selectivity and miniaturization design of the filter are realized, and the technical problem that the existing band elimination filter is difficult to adapt to a complex and changeable signal environment due to the limited passband width is solved.

The invention discloses a filtering power divider and a signal processing method. The filtering power divider comprises an input end used for inputting a first signal; the two output ends are used for outputting two paths of second signals; the filtering power division structure comprises two dual-band filtering structures and a power division structure, each dual-band filtering structure comprises a half-mode substrate integrated waveguide filter loaded with a first complementary split ring resonator (CSRR) structure, and the first CSRR structure is obtained by cascading two CSRR structures. And the filtering power division structure is used for performing dual-band filtering and power division on the first signal input from the input end to obtain the two paths of second signals, and outputting the two paths of second signals through the two output ends.

Apparatus (and corresponding method of use) 150 comprising control system 200, metamaterial 201 and electronic control system 200 which includes an electrical network 224 (e.g PIN diode, FET, MEMS swi

The application provides a low-profile duplex filter antenna and belongs to the technical field of wireless energy transmission.The low-profile duplex filter antenna comprises an upper metal floor, a dielectric substrate, a lower metal floor, a cavity column, a perturbation via and a suppression via; the lower metal floor is arranged on the lower surface of the lower dielectric substrate; the upper metal floor is arranged on the upper surface of the dielectric substrate; the cavity column penetrates through the upper metal floor, the dielectric substrate and the lower metal floor and surrounds a substrate integrated waveguide cavity; the perturbation via and the suppression via penetrate through the upper metal floor, the dielectric substrate and the lower metal floor; a cross-shaped groove is etched in the center of the upper metal floor; two complementary split ring resonator grooves with different diameters are etched at the connection between the circular cavity and the two side rectangular cavities of the upper metal floor; two feed lines are led out from the two ends of the upper metal floor. The antenna has the characteristics of low profile, is easy to integrate, and simultaneously reduces the manufacturing cost of the antenna and facilitates processing and manufacturing.

Embodiments of charged particle beam systems, components, and methods for extracting charged particles from a gas are described. In a first aspect, a charged particle source includes a resonator. The resonator may include a dielectric substrate defining a first side and a second side, the second side opposite the first side. The resonator may include a first conductive layer disposed on the first side. The first conductive layer may be disposed according to a pattern including a loop portion. The pattern may define a gap in the loop portion of the first conductive layer. The resonator may also include a second conductive layer disposed on the second side. The charged particle source may also include a source electrode. A source electrode may be disposed adjacent the first side. The source electrode may be offset from the dielectric substrate.

The application discloses a low-profile reflective array antenna with gain filtering characteristics and dual linear polarization independent control. The application comprises a planar reflective array composed of a plurality of reflective units, a horn antenna; the reflective unit comprises a magnetic electric dipole loaded with a split ring resonator, an x polarization feeding part and a y polarization feeding part, each feeding part comprises an independent feeding arm and an open metal microstrip line patch, the feeding arm and the open metal microstrip line patch are connected through a metallized via hole, the energy received by the magnetic electric dipole can be coupled to the feeding arm within the working band, the energy is transmitted from the feeding arm to the open metal microstrip line patch through the metallized via hole, and reflection occurs at the open metal microstrip line patch, so the reflection phase can be changed by adjusting the length of the open metal microstrip line patch. At a low frequency, a radiation zero point is introduced by using the characteristics of the magnetic electric dipole, and at a high frequency, a radiation zero point is introduced by using the half-wave resonance characteristics of the split ring resonator, so that the filtering characteristics are realized.