52 results about "Open loop resonator" patented technology

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)

An open loop resonator filter employed aperture on the ground plane is disclosed. The open loop resonator filter using apertures on the ground plane formed on the dielectric substrate, the open loop resonator filter including: one or more open loop resonators formed on a upper side of the dielectric substrate and implemented by microstrip lines; and one or more apertures formed on a predetermined area of the ground plane. The present invention can control the coupling coefficient of the open loop resonator without degrading the group delay characteristics by forming the aperture on the ground plane. Therefore, by forming the aperture on the ground plane, it is possible to design a filter having a wide bandwidth characteristic.

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 provides an L-shaped open loop resonator super-surface terahertz reflective polarized converter, and belongs to the technical field of electromagnetic wave full vector transmission regulation and control devices. The L-shaped open loop resonator super-surface terahertz reflective polarized converter comprises MxN metal chiral structure units which are arranged on the top layer and abottom metal layer, and an underlying dielectric substrate which is arranged between the metal chiral structure units and the bottom metal layer. The L-shaped open loop resonator super-surface terahertz reflective polarized converter is characterized in that the metal chiral structure units comprise first L-shaped resonance pieces and second L-shaped resonance pieces which are orthogonally arranged in a square area. The vertex of the first L-shaped resonance pieces and the vertex of the second L-shaped resonance pieces are arranged on the vertexes of the two diagonal corners of the square. Thegeometrical shape of each first L-shaped resonance piece is formed by two equal right-angled trapezoids, wherein the two right-angled trapezoids include a 45-degree base angle respectively, the beveledges are overlapped and the bottom edges are mutually perpendicular. The length of the bottom edges of the right-angled trapezoids forming the first L-shaped resonance pieces is less than the lengthof the bottom edges of the right-angled trapezoids forming the second L-shaped resonance pieces.

Disclosed is a filter. The filter comprises: a passband; a first open-loop resonator which is arranged above the passband, the first open-loop resonator comprising a first loop band and a second loop band, and both the first loop band and the second loop band being respectively provided with an opening thereon; and a second open-loop resonator which is arranged below the passband, the second open-loop resonator comprising a third loop band and a fourth loop band, and both the third loop band and the fourth loop band being respectively provided with an opening thereon, wherein the first loop band and the third loop band form a complementary open-loop resonator, and the second loop band and the fourth loop band form a complementary open-loop resonator. By means of the present invention, at least one of the problems existing in a filter in the prior art is solved, and a relatively excellent filter is provided.

The invention discloses a dual-frequency high-gain yagi antenna comprising a dielectric plate, transmission lines, a dipole, open-loop resonators, a reflector and directors. Two resonators are respectively printed on two surfaces of the dielectric plate. One arm of the dipole is connected with the transmission line on the upper surface of the dielectric plate and the other arm is connected with the reflector by the transmission line at the lower surface of the dielectric plate. The five directors with the lengths reduced successively are arranged on the upper surface of the dielectric plate. On the basis of the planar printed yagi antenna, the open-loop resonators are introduced; and because of the resonant effect of the dipole and the open-loop resonators, the dual-frequency work of the antenna is realized. The dipole not only is an excitation source but also is a reflector and the resonators not only serves as excitation sources but also serves as directors. While the dual-frequencyoperation is carried out, the high gain effect within the two operating frequency bands is realized. Moreover, the antenna having a simple structure is easy to process with low cost.

The invention provides a sensor chip, and a marker detecting device and detecting method. The sensor chip comprises a nested split-ring resonator and a microstrip transmission line, wherein the nestedsplit-ring resonator is formed by nesting of a plurality of split rings; the openings of the plurality of split rings are sequentially arranged at intervals along a direction perpendicular to the open sides of the split rings; and the nested split-ring resonator and the microstrip transmission line constitute an LC resonator. The marker detecting device and detecting method prepared based on thesensor chip have the advantages of convenient detection, high sensitivity, accuracy, and high speed.

The invention discloses a balance type band-pass filter with a harmonic suppression function, and solves the technical problem that the balance type band-pass filter with the harmonic suppression function, a simple structure and convenience in design and production is not available in the prior art. The filter comprises a port layer, a resonator layer and a ground layer, wherein the port layer comprises a first differential port and a second differential port; the resonator layer comprises a first resonator and a second resonator; the first resonator and the second resonator are both half-wavelength open-loop resonators; a differential feed port is formed in a voltage zero point of a resonator secondary harmonic and is in orthogonal coupling with the corresponding resonator to excite the resonator fundamental wave to form a passband, and to suppress secondary harmonic at the same time; and the open loop side of the first resonator and the open loop side of the second resonator are arranged at intervals so as to realize coupling between the resonators and to form a resonator third harmonic band-elimination structure. A stop band on a differential mode is expanded while broadband common-mode rejection is realized by the filter; and in addition, the design steps are quite simple and the performance is good.

The invention relates to a split-resonant-ring-structure-based metamaterial microwave filter comprising at least one filter unit. The filter unit consists of a dielectric substrate, a transmission line, a complementary split resonant ring, and an open-loop resonator. The transmission line is arranged at the top layer of the dielectric substrate; and a cascade gap capacitor is loaded and a gap is formed in the middle. The open-loop resonator that is arranged at the top layer of the dielectric substrate and the transmission line are in a coplane mode; and the open-loop resonator is arranged below the transmission line. The complementary split resonant ring is arranged at the bottom layer of the dielectric substrate and includes an inner ring and an outer ring, wherein the inner ring and the outer ring are in a concentric mode and the opening position of the inner ring is opposite to the opening position of the outer ring. According to the filter provided by the invention, the open-loop resonator is introduced based on the traditional complementary split resonant ring and a transmission zero point is generated at a passband high end, thereby improving an asymmetric phenomenon of the out-of-band rejection characteristic and the frequency response.

The invention discloses a filter duplex antenna based on an open-loop resonator. The filter duplex antenna comprises a rectangular patch with a short-circuit post loaded in the middle, a stacked parasitic rectangular patch, a transmitting channel feed probe, a receiving channel feed probe, a reflective floor, a transmitting port, a receiving port, a transmitting channel feed network, and a receiving channel feed network. The rectangular patch is printed on an upper surface of an intermediate dielectric substrate; the stacked parasitic rectangular patch is printed on an upper surface of an upper dielectric substrate; the reflective floor is printed on an upper surface of a lower dielectric substrate; and the transmitting channel feed network and the receiving channel feed network are printed on the lower surface of the lower dielectric substrate. According to the filter duplex antenna, with introduction of the open-loop resonator as a feed network, the antenna has a filter duplex function and is capable of carrying out transmission and receiving simultaneously; and electromagnetic waves transmitted and received by the antenna are linear-polarization electromagnetic waves.

The invention discloses an adjustable duplexer based on folded open-loop resonators. The adjustable duplexer comprises an upper microstrip structure layer, a middle dielectric plate layer and a lower grounding metal layer, wherein the upper microstrip structure layer comprises three input/output feeder lines, three blocking capacitors, a pair of first channel adjustable open-loop resonators and a pair of second channel adjustable open-loop resonators. Each adjustable open-loop resonator is composed of a folded microstrip line, a termination varactor diode, a center-loaded capacitor and a resistor, wherein the termination varactor diode is used for adjusting the center frequency of each channel; and the center-loaded capacitor and the resistor are used for restraining the harmonic component of each channel. A first input port and a second output port form a first channel transmission path, the first input port and a third output port form a second channel transmission path, and the two channels are mutually little influenced. The adjustable duplexer has the advantages that the center frequency of each channel is independently adjustable, the isolation degree is high, the structure is simply designed, the electric performance is good, and circuit integration and system packaging can be realized easily.

The present invention provides a mixed lossy duplexer, wherein a transmission zero point is individually controllable and the miniaturization is realized. Meanwhile, the in-band flatness of the duplexer is improved. The mixed lossy duplexer comprises a dielectric substrate, a composite micro-strip line structure printed on the upper surface of the dielectric substrate, and a coplanar waveguide structure arranged on the lower surface of the dielectric substrate. The composite micro-strip line structure includes three port feeder lines, four micro-strip open-loop resonators and a curved micro-strip line. The three port feeder lines are connected through the curved micro-strip line. The coplanar waveguide structure comprises two coplanar waveguide ring resonators, and the two coplanar waveguide ring resonators form a micros-strip line and coplanar waveguide hierarchical hybrid structure, wherein every two identical micro-strip open-loop resonators and one coplanar waveguide ring resonatorform a non-uniform Q-value resonator channel filter. Inconsistent resonator Q-values can improve the in-band flatness and then the ground patch resistance is introduced by the micro-strip open-loop resonators. The Q values of the resonators are reduced and the in-band flatness is further improved.

The invention discloses an electrically-small third-order filter antenna with a good out-of-band rejection characteristic. The electrically-small third-order filter antenna belong to the field of filter and antenna cross technologies, and comprises a feeder portion, a resonator portion, a coupling line portion, a radiating patch portion, a dielectric substrate and a grounding plate. The electrically-small third-order filter antenna is based on two open-loop resonators with openings facing each other, and replaces a last resonator with a zigzag antenna comprising a sector, so that the antenna has energy radiation and resonance functions, thereby reducing integral size of a filter and the antenna, and making transmission loss between the filter and the antenna close to zero. Accordingly, the antenna serving as the last-order resonator has a function of out-of-band rejection. Further, a resonator is parallelly connected in the interior of a first resonator, so that bandwidth of the filter antenna is significantly increased while maintaining the original size unchanged. The electrically-small third-order filter antenna further has the advantages of compact structure, small electrical size and easy processing.

The invention discloses an ultra-wideband band-pass filter with band stop characteristic. The band-pass filter is characterized by consisting of a defected stepped-impedance resonator (DSIR) etched on a ground plane, three micro-strip open-loop resonators and an input/output feeder line, wherein the DSIR and the input/output feeder line are on different planes, and the input/output feeder line and the DSIR are arranged orthogonally; and the loaded three micro-strip square open-loop resonators and the DSIR are positioned on different circuit layers, and the three micro-strip square open-loop resonators are positioned above the DSIR. According to the band-pass filter, a transmission zero point is generated and a stop band is formed by using the opposite coupling of the open-loop resonators and the DSIR on the premise of keeping the circuit volume so as to effectively suppress wireless local area network signals.

The invention discloses a double-open-loop miniaturized equalizer. The double-open-loop miniaturized equalizer comprises a micro-strip layer, a dielectric layer and a metal layer which are sequentially stacked from top to bottom; the micro-strip layer further comprises a first double-open-loop resonator and a second double-open-loop resonator with the same structure; one end of a first open ring surface micro-strip is connected with a first resistor, and the other end of the first open ring surface micro-strip is of an open ring structure; the circle center of the open ring structure of the first open ring surface micro-strip and the circle center of the open ring structure of a first inner open ring surface micro-strip are located at the same point; and one end of the first inner open ring surface micro-strip is connected with the metal layer, and the other end of the first inner open ring surface micro-strip is of an open ring structure. According to the double-open-loop miniaturizedequalizer provided by the invention, a novel resonant structure is adopted as a resonant unit of the double-open-loop miniaturized equalizer, the structure is simple and the size is small; since thestructure has a lot of variable parameters, the double-open-loop miniaturized equalizer is more flexible than a traditional transmission line structure resonator, and can realize a complicated equalization curve; and besides, the double-open-loop miniaturized equalizer has a larger equalization amount and a large bandwidth.

The invention discloses a communication and sensing separated radio frequency sensor model construction method and a radio frequency identification sensor. Metamaterial energy absorption characteristics of a bright and dark double-harmonic-oscillator coupling system formed by an open-loop resonator model and a U-shaped symmetrical resonator model are utilized, an electromagnetism-like induced transparency effect is generated. When cracks on a metal floor model surface are detected, two resonant frequencies used for sensing and communication are obtained. Sensing resonant frequency offsets generated by different crack depths are different. Therefore, the communication function and the sensing function can be separated, energy distribution of a sensing function and a communication function is balanced, and the two functions do not interfere each other. The structural size of the radio frequency sensor model is finely adjusted according to the resonant frequency obtained through simulation, so that the radio frequency sensor model achieves impedance matching at the resonant frequency, the radio frequency sensor model after impedance matching is completed is output, and the obtained radio frequency sensor has high communication capability while maintaining high sensing sensitivity.

The invention provides a filter with multilayered structure. The filter with multilayered structure comprises a ceramic base plate composed of six layers of LTCC, the top layer of the ceramic base plate is the microstrip line layer provided with a first resonator and a fourth resonator; the bottom layer of the ceramic base plate is the microstrip line layer provided with a second resonator and a third resonator; the middle layer of the ceramic base plate is the ground layer. According to the filter with multilayered structure, the gamma/4 transmission line and open-loop resonator are formed on the upper layer and lower layer and the size of each part is designed reasonably, the size of the filter is smaller while the performance is not changed.

The invention discloses an active microwave sensor based on a microstrip complementary open-loop resonator structure. The active microwave sensor is used for measuring the complex dielectric constant of a dielectric material. The sensor comprises a micro-strip complementary open-loop resonator structure, an active feedback loop, a dielectric layer and a metal sheet, and the active feedback loop is a micro-strip line loop with a microwave amplifier MRF947 and can generate negative resistance to compensate loss of a resonator; and the micro-strip complementary open-loop resonator structure is composed of a pair of feeder lines and a grooved metal CSRR structure, the grooved metal CSRR structure is a square groove ring, the part between grooves is an area with the maximum electric field intensity, a to-be-measured medium sample covers the whole CSRR structure, and an S parameter curve of the sensor is measured through a vector network analyzer. The sensor has the advantages of high sensitivity, high quality factor and ultra-small electrical size, and ensures the accuracy of measurement.

The invention discloses a high-sensitivity microwave humidity sensor based on two-dimensional strip-shaped MoO3 nanometer materials, belongs to the field of humidity sensors, and aims to solve the problems of low sensitivity and long response time of an existing humidity sensor. In the microwave humidity sensor disclosed by the invention, one end of a connection microstrip line is communicated with a first port feeder, and the other end of the connection microstrip line is communicated with a second port feeder; a No.1 rectangular ring open loop resonator and a No.2 rectangular ring open loopresonator are symmetrically distributed on two sides of the connection microstrip line; a No.3 rectangular ring open loop resonator and a No.4 rectangular ring open loop resonator are symmetrically distributed on two sides of the connection microstrip line; the connection microstrip line and four rectangular ring open loop resonators are all in parallel line coupling; and a sensitive material is positioned on the opening of each open loop resonator. By use of the sensor, a microwave humidity detection device is optimized from multiple aspects, including frequency-selecting analysis, gas sensitive material synthesis, microwave device design and the like, and the high-sensitivity detection of a 10%-90% relative humidity range is realized.

The invention relates to an open-loop cross-coupled band-pass filter which comprises four open loop resonators which are arranged up and down. The invention further relates to a radio frequency transceiving front-end circuit structure with the band-pass filter. By adopting the open loop cross-coupled band-pass filter and the radio frequency transceiving front-end circuit structure with the band-pass filter, the influence of the group time delay of the band-pass filter on the 5G signal distortion is solved. The bandwidth of a 5G system is larger than that of a 4G system, and the requirement ofthe 5G system for the group time delay of the filter is higher. According to the present invention, the problems of low cost and small size of the band-pass filter are solved. The 5G system adopts thelarge-scale multiple channels, and has higher requirements for the size and the cost.