217 results about "Split ring resonators" patented technology

A magnetic field focusing assembly includes a magnetic field generating device configured to generate a magnetic field, and a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus the magnetic field produced by the magnetic field generating device.

A system, method, and apparatus for detecting at least one condition of interest relating to a tube, e.g. the presence of an air bubble. In some embodiments, the sensor includes antennas, a split-ring resonator, a frequency generator capable of generating frequencies in the microwave range, and a detection component. The detection component may estimate at least one parameter of received microwave energy in order to determine if a condition of interest exists.

The invention provides simplified negative index materials (NIMs) using wire-pair structures, 4-gap single ring split-ring resonator (SRR), fishnet structures and overleaf capacitor SRR. In the wire-pair arrangement, a pair of short parallel wires and continuous wires are used. In the 4-gap single-ring SRR, the SRRs are centered on the faces of a cubic unit cell combined with a continuous wire type resonator. Combining both elements creates a frequency band where the metamaterial is transparent with simultaneously negative ε and μ. In the fishnet structure, a metallic mesh on both sides of the dielectric spacer is used. The overleaf capacitor SRR changes the gap capacities to small plate capacitors by making the sections of the SRR ring overlap at the gaps separated by a thin dielectric film. This technique is applicable to conventional SRR gaps but it best deploys for the 4-gap single-ring structures.

Antennas developed for electromagnetic field energy harvesting, typically referred to as rectennas, provide an alternative electromagnetic field energy harvesting means to photovoltaic cells if designed for operation in the visible frequency spectrum. Rectennas also provide energy harvesting ability or power transfer mechanism at microwave, millimeter and terahertz frequencies. However, the power harvesting efficiency of available rectennas is low because rectennas employ traditional antennas whose dimensions is typically proportional or close to the wavelength of operation. This invention provides a device for electromagnetic field energy harvesting that employs a plurality of electrically-small resonators such as split-ring resonators that provide significantly enhanced energy harvesting or energy collection efficiency while occupying smaller footprint. The invention is applicable to electromagnetic energy harvesting and to wireless power transfer.

Filter for microwaves and millimetER waves, characterised in that it comprises a planar transmission medium (1) that it includes a conductor strip (3), metallic ground plane (4) and dielectric substrate (2) and in that it includes at least one split rings resonator (5a, 5b, 5c, 5d, 5e and 5f)

The invention provides a terahertz metamaterial biosensing chip and a testing method of the terahertz metamaterial biosensing chip. The terahertz metamaterial biosensing chip comprises a substrate and a sub-wavelength metallic split-ring resonator array attached on the substrate, wherein the substrate is made of a material having the absorption coefficient less than 0.5-1cm under the terahertz waveband; the sub-wavelength metallic split-ring resonator array comprises multiple split-ring resonator units, each split-ring resonator unit is a square metal frame; and the middle parts of the edges of the square metal frame are provided with same openings respectively. Compared with the existing biosensor, the terahertz metamaterial biosensing chip is made of the terahertz metamaterial, so that the uniformity of the terahertz metamaterial biosensor structure is improved, and the sensing sensitivity is improved due to the uniformity and simple structure design.

The invention relates to the field of metamaterial devices and provides a switching-controllable THz wave metamaterial perfect absorber (MPA) and a control method thereof. The switching-controllable THz wave metamaterial perfect absorber comprises a substrate, an MIT (metal-insulator transition) layer positioned on the substrate, a dielectric layer positioned on the MIT phase change layer and metal opening resonance units positioned on the dielectric layer and being in cyclic arrangement, and the on / off of the absorber at the resonance frequencies of the metal opening resonance units is realized through changing the conductivity of the MIT phase change layer. According to the invention, the variation of the conductivities of the MIT phase-change material before and after phase change is utilized to change the absorptivity of the absorber, so that the THz MPA can be turned on / off near the resonance frequency of the metal opening resonance units, initiative control of the electromagnetic transfer characteristics of THz wave bands at the specific frequency, and accordingly, a larger on-off ratio or modulation depth can be obtained; and the switching-controllable MPA adopting the substrate-vanadium dioxide-dielectric layer-SRRs (Split Ring Resonators) four-layer structure can control the conductivity of vanadium dioxide through an external field so as to control the absorptivity of the MPA.

A magnetic field focusing assembly includes a magnetic field generating device configured to generate a magnetic field, and a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus the magnetic field produced by the magnetic field generating device.

The invention discloses an ultra wideband antenna with four-notched band characteristics. The antenna comprises a dielectric substrate (1), a radiating unit (2), two coplanar waveguide grounding planes (3) and a coplanar waveguide feed micro-strip line (4), wherein all the radiating unit (2), the coplanar waveguide grounding planes (3) and the coplanar waveguide feed micro-strip line (4) are printed on the front surface of the dielectric substrate (1); two complementary split ring resonators (5 and 6) are etched on the radiating unit (2); the two coplanar waveguide grounding planes (3) are positioned on the two sides of the coplanar waveguide feed micro-strip line (4) respectively; two pairs of inverted L-shaped slots (7 and 8) are etched on the coplanar waveguide grounding planes (3); and the split ring resonators (5 and 6) and the inverted L-shaped slots (7 and 8) form four notched bands. The working band of the antenna covers 2 to 12GHz, interference signals in the ultra wide working band can be well suppressed, and the antenna can be used for ultra wideband antenna communication.

The invention discloses a substrate integrated waveguide split ring resonator-based microwave band pass filter. The microwave band pass filter comprises a substrate integrated waveguide which is formed by fixing two rows of metal members on a dielectric substrate, wherein the two ends of the substrate integrated waveguide are connected with a micro-strip feed line respectively; the surfaces of both the micro-strip feed line and the substrate integrated waveguide are made of metal dielectric; the upper surface of the substrate integrated waveguide is positioned between the two rows of metal members to corrode an m*n split ring resonator array; and a row of dumbbell-shaped area bodies or dumbbell-shaped deformation areas are corroded corresponding to each line of split ring resonators on the lower surface of the substrate integrated waveguide between the two rows of metal members. The band pass filter has the advantages of out-of-band steep attenuation, small volume, light weight and high power capacity and is easy to be integrated with other planar microwave and millimeter-wave circuits, so that the band pass filter is expected to be applied to the microwave and millimeter-wave integrated circuit or a millimeter wave integrated circuit.

A vertical split ring resonator antenna is disclosed, comprising a substrate having an upper surface and lower surface, an interdigitated capacitor coupled to the upper surface of the substrate and ground coupled to the lower surface. The interdigitated capacitor includes a first planar segment and a second planar segment, each having interdigitated fingers that are separated by a gap disposed between the first planar segment and second planar segment. The interdigitated capacitor is coupled to the substrate to form a vertical split ring resonator.

Magnetic resonance imaging (MRI) devices detect a magnetic field having a particular frequency induced by hydrogen nuclei included in a human body and convert the detected magnetic field into two- or three-dimensional images, thereby visualizing the internal structure of the human body without causing any harm to the human body. The higher the resolution of an MRI technique, the more accurate a diagnosis can be obtained. Thus, various methods are introduced to improve resolutions. For example, a wearable magnetic resonator and an application device including the wearable magnetic resonator are provided. The wearable magnetic resonator is flexible and used to improve MRI resolution by amplifying MR signals while being attached to a human body to amplify MR signals when MRI is performed. The wearable magnetic resonator includes the following: a dielectric thin film that is flexible; and a conductor thin film that is disposed to have a split ring resonator (SRR) structure on the dielectric thin film and is flexible, wherein the wearable magnetic resonator includes an inductance component and a capacitance component, and the wearable magnetic resonator amplifies a magnetic field by resonating at a predetermined frequency, thereby improving a MRI resolution.

An apparatus and method are disclosed for detecting terahertz radiation at room temperature. A detecting pixel includes a sub-wavelength split-ring resonator, and is mechanically coupled to (but thermally decoupled from) a substrate via a cantilever formed from two materials that have a significant mismatch in their thermal expansion coefficients. Incident radiation causes the split-ring resonator to resonate, thereby generating heat that is transferred to the cantilever, causing the cantilever to flex. An optical readout system includes a secondary light source, such as a laser, that shines on a reflective surface on the pixel, whereby a photodiode detects the reflected light and permits calculation of a relative deflection of the pixel in the nanometer range. An exemplary detector has a noise equivalent power rating of approximately 60 pW / √Hz.

A multi-input multi-output (MIMO) antenna for improving isolation is provided. Split ring resonators (SRRs) are structurally arranged on the lower end of a ground surface between a plurality of antenna patterns spaced apart from each other. Accordingly, permeability of the SRRs has a negative value, which prevents current from flowing between antennas. Consequently, the isolation characteristic of the antennas is improved.

The invention relates to a dual-frequency terahertz band-pass filter, in particular to the design and production of the dual-frequency terahertz band-pass filter with a semi-insulating gallium arsenide based hollow surface and a complementary split ring resonator, and relates to the terahertz technology and the technical field of semiconductor micromachining. The dual-frequency terahertz band-pass filter utilizing the working principle of the complementary split ring resonator achieves surface plasma polariton resonance through the adjustment on the inner diameter, outer diameter, opening width and periodic structure of the C-SRR (split ring resonator) and obtains low-frequency and high-frequency resonance in two abnormal transmission enhancement modes of inductance-capacitance (LC) resonance. The energy conversion between two resonance frequencies is achieved through the electromagnetic interaction of the two resonances, so that the terahertz reaching the same transmission strength at two bands can be output. The dual-frequency terahertz band-pass filter takes advantage of an existing semiconductor micromachining process and is simple in production process, easy to operate and capable of accurately controlling a micro-structure machining area of the complementary split ring resonator and greatly reducing production costs.

A split ring-resonator includes a substrate, an inner-trench or cavity formed into the substrate, the inner trench or cavity including a split, and an outer trench or cavity formed into the substrate around the inner trench or cavity, the outer trench or cavity including another split disposed at an opposite end of the split in the inner trench or cavity, wherein the inner trench or cavity and the outer trench or cavity are configured to receive an electrically conductive gas and / or plasma to form a split-ring resonator,

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.

A zeroth-order resonator is characterized in that a complementary split ring resonator is etched on a grounding layer; and a slit capacitor is etched on a microstrip signal line and is located above the complementary split ring resonator. The method comprises the following steps: setting an initial value for each parameter of the zeroth-order resonator; subjecting the zeroth-order resonator to Bloch analysis according to the initial values to obtain a resonant frequency f1; adjusting the parameter until f1 is equal to f0; and calculating input admittance near the resonant frequency f0 to obtain admittance slope parameter of the zeroth-order resonator. A narrow-band filter has a complementary split ring resonator and includes a plurality of zeroth-order resonators and a plurality of J-converters in alternated arrangement. By adopting the complementary split ring resonator, the zeroth-order resonator has large susceptance slope parameter, and the filter using the zeroth-order resonator has narrower bandwidth. The narrow-band filter can be used for separating signals among different channels in a communication system, and a medium-frequency narrow-band filter used for RF / microwave measurement instruments can acquire high frequency resolution.

The invention relates to a CSRR (Complementary Split Ring Resonators) microstrip resonant sensor for measuring a complex dielectric constant and application thereof. The microstrip resonance sensor comprises a dielectric substrate, a conductor signal line, a metal grounding plate and a complementary split-ring resonator; the conductor signal line is printed right above the dielectric substrate, the metal grounding plate is integrally formed right below the dielectric substrate, and the complementary split-ring resonator is etched in the metal grounding plate. The CSRR microstrip resonance sensor for measuring the complex dielectric constant realizes measurement of the complex dielectric constant based on the CSRR, has the advantages of small size, light weight, low cost, high precision, nondestructive measurement, convenience in sample preparation and the like, and basically overcomes the defects of the traditional microwave measurement technology.

Provided are systems and methods to generate single-cycle THz pulses from a few tens of nanometers thin layer of split ring resonators (SRRs) via optical rectification of femtosecond laser pulses. The emitted THz radiation, with a spectrum ranging from about 0.1 to 4 THz, arises exclusively from pumping the magnetic-dipole resonance of SRRs around 200 THz. This resonant enhancement, together with pump polarization dependence and power scaling of the THz emission, underpins the nonlinearity from optically induced circulating currents in SRRs, with a huge effective nonlinear susceptibility of 0.8×10−16 m2 / V that far exceeds surface nonlinearities of both thin films and bulk organic / inorganic crystals and sheet nonlinearities of non-centrosymmetric materials such as ZnTe.

The invention discloses a power supply distribution network based on a local electromagnetic band gap structure. The electromagnetic band gap structure is locally etched on a power supply plane, and a ground plane is kept intact. Basic units of the electromagnetic band gap structure are formed by complementary split ring resonators, and the adjacent basic units of the electromagnetic band gap structure are connected by a Z-shaped bridge. The problems that the inhibiting degree of synchronous switching on and off noise in a hybrid circuit system is not high enough and the inhibiting frequency band is not wide enough are effectively solved, and the problem that the destructiveness of the traditional global electromagnetic band gap structure to the power supply plane is large can be solved. The power supply distribution network disclosed by the invention has excellent power supply integrity, and the influence of electromagnetic interference can be lowered.

The invention provides an ultra broadband antenna of an integrated filter, which comprises a medium substrate, a microstrip feeder structure of a radiating unit arranged on one side of the medium substrate, the other side of the medium substrate is partially grounded, the radiating unit is provided with a split-ring resonator (SRR), and a microstrip line is directly connected to the radiating unit. The antenna relates to the invention has excellent broadband property and good omnidirectional radiation property, and the antenna is integrated with a filter with a complementary split-ring resonator (CSRR), so that the influence between the communication of local area network and ultra broadband communication system of the antenna can be prevented. The antenna provided by the invention has the advantages that the design is simple and compact, the volume is small, the process is convenient and the cost is low. The antenna can be applied to electronic reconnaissance device and electronic countermeasure device and the like.

The invention discloses a power-adjustable backward wave oscillator. The power-adjustable backward wave oscillator is characterized in that: by inserting upper and lower two rows of periodically complementary split-ring resonator structure into the middle part of a cavity of rectangular waveguide vertically, the complementary split-ring resonator structure has a relatively higher electric field resonant response at the slit of the opening, that is, between the horizontal branches of the two half parts, and shows the meta-material electromagnetic characteristic with a negative dielectric constant epsilon and a negative magnetic permeability Mu; longitudinal resonant field intensity is formed at the upper surface and lower surface of the periodically complementary split-ring resonator structure, thus being conductive to interaction between charged particles of band-shaped electron beams and electromagnetic waves; and at the same time, three electron beam channels are formed. Therefore, compared with a traditional relativism backward wave oscillator, the power-adjustable backward wave oscillator has higher coupling impedance and can obtain very high power output and electron efficiency. Besides, the structure enables one electron beam to work individually, or enables two electron beams or three electron beams to work, so that three kinds of adjustable power output of single beam, double beam and three-beam can be formed and then multi-band-shaped power can be adjustable.

The bandpass filter comprises transmission line comprising a conductor strip (2), and, in said transmission line, at least one bandpass filter cell, comprising at least one split-rings resonator (6, 7), inductive element (4, 41) and capacitive element (3). The bandpass filter has a frequency response in which at least one passband can be identified. The conductor strip, split-rings resonator(s), inductive element(s) and capacitive element(s) are dimensioned and arranged so that the bandpass filter, for frequencies within said passband, behaves as a left-handed transmission line for at least one range of frequencies within said passband, and as a right-handed transmission line for at least another range of frequencies within said passband, thus providing for a large bandwidth. The invention also relates to an electronic device including the filter, and to a method of producing it.

The present invention relates to a multi-stopband ultra-wideband antenna based on split ring resonators and patch etching gaps, comprising a disk antenna and a split ring resonator coupling micro-strip structure. A lower surface metal clad layer (2) is the ground of a feeder part. An upper surface metal clad layer (3) comprises an antenna radiation unit (4), a micro-strip feeder (5), a trapezoidal impedance transformation line (6) and a split ring resonator (8), wherein, the antenna radiation unit (4) adopts the disk antenna on which split ring shape gaps (7) with the same circle center are arranged; the back of the disk antenna has no metal area; the micro-strip feeder (5) adopts a micro-strip line form; the micro-strip feeder (5) and the antenna radiation unit (4) are in impedance matching connection through the trapezoidal impedance transformation line (6); the split ring resonator (8) comprises two pairs of resonators, namely a first resonator (9) and a second resonator (10), which are symmetrically distributed on two sides of the feeder; each resonator is formed by an inner split ring and an outer split ring, and the opening direction of the inner ring is far away from the feeder, while he opening direction of the outer ring is close to the feeder.

The invention provides simplified negative index materials (NIMs) using wire-pair structures, 4-gap single ring split-ring resonator (SRR), fishnet structures and overleaf capacitor SRR. In the wire-pair arrangement, a pair of short parallel wires and continuous wires are used. In the 4-gap single-ring SRR, the SRRs are centered on the faces of a cubic unit cell combined with a continuous wire type resonator. Combining both elements creates a frequency band where the metamaterial is transparent with simultaneously negative ∈ and μ. In the fishnet structure, a metallic mesh on both sides of the dielectric spacer is used. The overleaf capacitor SRR changes the gap capacities to small plate capacitors by making the sections of the SRR ring overlap at the gaps separated by a thin dielectric film. This technique is applicable to conventional SRR gaps but it best deploys for the 4-gap single-ring structures.

The invention discloses a dual-band adjustable band-pass filter. The filter comprises an upper layer microstrip line structure, a middle layer dielectric substrate, a lower layer grounding metal plate and a metal through hole, wherein the microstrip line structure comprises a multi-mode resonator and a pair of input / output feeder lines; the multi-mode resonator comprises two split ring resonators that are arranged symmetrically left and right; the opening position of each split ring resonator is connected through a group of series-wound variable capacitance diodes; the centers of the two split ring resonators are connected through a group of series-wound variable capacitance diodes; a section of short open-circuit branch microstrip line, which is loaded by the variable capacitance diode at the tail end, is loaded in the middle of the group of the series-wound variable capacitance diodes; extra branch coupling is introduced to the space between the split ring resonators; and the input / output feeder lines are microstrip lines with one short-circuit ends and the other open-circuit ends. The two passbands of the filter are adjustable, and the bandwidth is controllable as well; and meanwhile, only one multi-mode resonator is adopted, so that the dual-band adjustable band-pass filter has relatively high advantage in miniaturization.

The present invention relates to a biosensor (1) which enables the concentration of a desired molecule inside a liquid in the medium, and essentially comprises at least one metallic plate (2) which functions as a ground plate, and which is preferably manufactured from aluminum, at least one dielectric substrate (3) which is located on top of the metallic plate (2), at least one split-ring resonator (4) which is realized on top of the dielectric substrate (3), and which is coated with a dielectric layer, at least two symmetrical antennas (5) which are realized on the same plane with the split-ring resonator (4) on the substrate (3), at least two ports (6) where a network analyzer is connected with the antennas (5) via SMA (SubMiniature Version A) connectors.

The invention belongs to the technical field of an antenna in a communication system, and specifically relates to a trapped wave controllable ultra-wide-band antenna. The trapped wave controllable ultra-wide-band antenna comprises a microstrip feeder line, a radiation unit, a dielectric substrate and a grounding plate; the microstrip feeder line and the radiation unit are arranged on the upper layer, the dielectric substrate is arranged in the middle layer and positioned below the microstrip feeder line and the radiation unit, and the grounding plate is arranged on the lower layer and positioned below the dielectric substrate; an open circuit gap and an opening resonance ring are arranged on the radiation unit, and the open circuit gap extends from the right side edge of the radiation unitto the interior of the radiation unit; a first opening resonance ring and a second opening resonance ring are arranged on the grounding plate; the open circuit gap and the opening resonance ring areloaded with a first PIN diode and a second PIN diode respectively; and the first opening resonance ring and the second opening resonance ring are loaded with a third PIN diode and a fourth PIN diode respectively. The trapped wave controllable ultra-wide-band antenna can realize ultra wide band, single band wave trapping, dual band wave trapping and triple band wave trapping, and is simple in structure and suitable for the ultra-wide-band wireless communication system.