36 results about "Interdigital capacitor" patented technology

The invention discloses a surface acoustic wave resonator and a filter. The resonator comprises an interdigital transducer arranged on a piezoelectric substrate, reflecting gratings located on the two sides of the interdigital transducer and at least one laminated protection structure arranged in the outer side area of the reflecting gratings. The laminated protection structure comprises an interdigital capacitor arranged on the surface of the piezoelectric substrate and an organic material layer covering the interdigital capacitor; two bus bars of the interdigital capacitor are electrically connected with two signal ports of the resonator respectively, and the interdigital capacitor is connected with the interdigital transducer in parallel. According to the invention, the anti-ESD capability of the resonator can be effectively improved under the condition of not increasing additional process steps and not changing the electrode structure of the normal working area of the resonator.

The invention relates to the technical field of flexible electronic sensors, in particular to a flexible large strain sensor for crack detection and a preparation method thereof.The flexible large strain sensor comprises a skeleton-shaped packaging layer, the packaging layer comprises two rigid fixing ends, and the two rigid fixing ends are integrally connected through a sensitive unit section; a rigid reinforcing structure is embedded in each rigid fixing end, mechanical fixing holes are formed in each rigid fixing end and the corresponding rigid reinforcing structure in a penetrating mode, interdigital capacitor electrodes are embedded in the sensitive unit sections, and the interdigital capacitor electrodes are made of flexible conductive materials through laser ablation. The end part of the interdigital capacitor electrode is connected with a flexible extension wire, the tail end of the flexible extension wire is connected with an external lead, and the external lead is embedded between the packaging layer and the upper surface of the rigid fixed end; the problems that an existing flexible sensor is unstable in installation, contradictory in measuring range and precision and poor in environmental adaptability in structural crack detection are solved.

This invention discloses a wireless, passive, and visualized cerebrospinal fluid drainage tube flow monitoring sensor, system, and fabrication method, belonging to the field of biomedical sensing and microelectromechanical systems (MEMS) technology. It includes a flexible substrate, an interdigital capacitor-open resonant ring structure disposed on the substrate surface, and a microchannel pressure conversion structure bonded to it; the microchannel corresponds vertically to the position of the interdigital capacitor. The pressure generated by the cerebrospinal fluid flow drives the displacement of the liquid metal, modulating the equivalent dielectric constant of the interdigital capacitor and causing a resonant frequency shift. The frequency drift is wirelessly read by an external device, and the flow rate is calculated using an algorithm, achieving passive wireless continuous monitoring. This invention, employing the aforementioned sensor, system, and fabrication method, solves the problems of high infection risk, low accuracy, and inability to continuously monitor existing drainage monitoring methods that rely on manual observation or wired sensors. It has the advantages of high sensitivity, flexible integration, and good safety.

The invention discloses a terahertz detection unit based on a dielectric couple two-level system and an array detector. The array detector comprises an array composed of resonance detection units. The resonance detection unit comprises a broken line inductor, an interdigital capacitor and a coupling feeder line which are connected, and a dielectric layer and an absorber are stacked on the interdigital capacitor. Wherein the absorber is located above the dielectric layer, so that the dielectric layer isolates the interdigital capacitor from the absorber; and the broken line inductor, the interdigital capacitor, the coupled feeder line and line bodies connected among the components are all made of superconducting materials. The absorber is a grid body made of a non-superconducting metal material. After the absorber is used for receiving terahertz radiation, energy is transmitted to the dielectric medium, a dipole two-energy-level system in the dielectric medium is changed, the dielectric constant of the dielectric medium is changed, then the resonant frequency of the resonance detection unit is changed, and terahertz wave detection and imaging are achieved by analyzing the change of the resonant frequency of the resonance detection unit.

The invention is suitable for the technical field of cable life evaluation, and provides a cable life evaluation device and method based on interdigital sensing, and the method comprises the following steps: coupling an interdigital capacitor plate to a to-be-measured cable, and measuring values and capacitance values at a plurality of frequencies through an LCR digital bridge; processing the capacitance value by using a KNN algorithm, and judging the damage state of the cable; carrying out linear compensation correction on a measured value by combining prior knowledge of the cable; inputting the compensated and corrected value into a pre-trained DT regression model to obtain an aging degree evaluation result of the cable; and fusing the judgment result of the damage state and the evaluation result of the aging degree, and outputting the residual life pre-evaluation of the cable. According to the method, rapid, lossless and accurate detection of the waste cable is realized, and a reliable basis is provided for recycling and screening of the cable.

This invention discloses a microwave non-contact fed strain detection sensor for metal devices, comprising a vector network analyzer and a waveguide antenna connected thereto; a metamaterial array is arranged at a relative position to the waveguide antenna, and a feeding network is arranged on the side of the metamaterial array away from the waveguide antenna; the feeding network receives signals from the metamaterial array and outputs the signals to an interdigital strain sensing probe; the metal device under test is arranged on the side of the interdigital strain sensing probe away from the feeding network; the metamaterial array includes a dielectric substrate and radiating elements arranged in a periodic array on the surface of the dielectric substrate; the radiating elements are circular ring structures with a single opening, and the opening directions of the radiating elements are consistent; this invention has a simple structure, high electromagnetic signal capture efficiency, and an output shaft with an open structure, which can improve the output efficiency by 9.8% compared with traditional feeding networks; the interdigital capacitors provided have a more compact structure, lower profile, and stronger resonance characteristics.

The invention relates to the technical field of intelligent beekeeping, and discloses a mature honey standardized production control system based on strong group multiple box bodies, which comprises a dielectric spectrum sensing array integrated on a comb foundation, a data acquisition module, a central processing module and a user interface module. According to the system, the micro interdigital capacitor unit is used for independently detecting electromagnetic characteristics of substances in cells, the central processing module obtains complex impedance spectroscopy and temperature data, a content classification model and a polynomial regression model containing temperature cross terms are operated in parallel, the types of the contents in the cells are recognized, and the water content of honey is accurately calculated. The system establishes data mapping between a super production area and a hive breeding area, respectively calculates a mature honey harvest index and a breeding health degree score, and automatically generates a honey extraction recommendation or a health alarm. According to the invention, lossless, in-situ and high-resolution monitoring of the internal state of the beehive is realized, and the problems that the bee colony is interfered by manual box opening and the honey maturity is lack of quantitative standards are solved.

The invention provides a broadband wide-axial-ratio circularly polarized antenna based on a tight coupling principle, and relates to the technical field of microstrip antenna structure design, the broadband wide-axial-ratio circularly polarized antenna comprises a first dielectric plate as a substrate, and a feed network capable of realizing one-to-four power division and 90-degree phase shift is printed on the lower bottom surface of the first dielectric plate; a second dielectric plate is arranged above the first dielectric plate in parallel, four arc-shaped metal patches are arranged on the lower bottom surface of the second dielectric plate to form a radiation unit, and the adjacent patches are tightly coupled through an interdigital capacitor; and a strip-shaped microstrip line is arranged on the upper top surface of the second dielectric plate. And the four coaxial feeder lines are vertically connected with the output end of the feed network and each metal patch, so that high-efficiency transmission of signals is realized. The upper surface of the first dielectric plate is provided with an annular metal cavity which is connected with the metal ground and is used for improving the axial ratio at a low elevation angle. According to the invention, wide impedance bandwidth and wide axial ratio bandwidth are realized, and the antenna has wide axial ratio beam width and high radiation efficiency.

The invention belongs to the technical field of microwaves, and particularly relates to a slot line-half-mode SIW composite transmission line for microwave / millimeter wave transmission, which is characterized in that a half-mode SIW structure is arranged in a sandwich structure, and a first metal layer synchronously loads a conical microstrip feeder line and a horn-shaped microstrip feeder line structure; the second metal layer is used as a metal structure with a floor function, and the design mode of additionally loading a slot line and an interdigital capacitor enables the device to realize transmission of an S wave band and a Ka wave band at the same time. Wherein in the S wave band, the horn-shaped micro-strip structure of the first metal layer is used for carrying out coupled feeding on the slot line, and in the Ka wave band, the conical micro-strip structure of the first metal layer is used for directly feeding the half-mode SIW; meanwhile, the second metal layer loads an interdigital capacitor at the tail end of the half-mode SIW to complete filtering, and finally the composite transmission line feed structure supporting synchronous transmission of the half-mode SIW and the slot line is constructed. The machining process is simplified, and the machining cost is reduced.

This invention discloses a cross-shaped microstrip filter, belonging to the field of microwave RF passive device technology. The filter includes a dielectric substrate, an input microstrip line, an output microstrip line, two sets of series-arm resonant units, and two sets of parallel-arm resonant units. The series-arm resonant units are composed of microstrip inductors and interdigital capacitors connected in series, with the resonant frequency corresponding to the filter's center frequency. The parallel-arm resonant units are composed of microstrip inductors and surface-mount capacitors connected in series, generating low-frequency and high-frequency transmission zeros respectively. The four sets of resonant units converge at a common node to form a cross-shaped topology. This invention, through a modular cross-shaped architecture, allows direct mapping between the resonant units and the frequency response, simplifying debugging and increasing design efficiency. Modular cascading can achieve high-order filtering, significantly improving band-edge steepness and stopband suppression, making it suitable for microwave RF systems such as communication, radar, and satellite navigation.

The invention relates to a special tool for testing and trimming mass distribution defects of an uncoated harmonic oscillator, and belongs to the field of testing and trimming of quartz hemispherical harmonic oscillators. The lower base and the upper base are each of a cylindrical structure which is vertically arranged in the axial direction. The upper base is coaxially arranged at the top of the lower base; the transmission shaft is axially and vertically arranged at the axis of the upper base and the lower base; the two groups of ball bearings sleeve the upper and lower ends of the transmission shaft respectively; the ball bearing located on the upper portion is arranged on the inner wall of the upper base. The ball bearing located on the lower portion is arranged on the inner wall of the lower base. Taper holes are formed in the top ends of the transmission shafts; the collet chuck is embedded into the taper hole; the locking nut is sleeved on the outer wall of the joint of the collet and the transmission shaft; the interdigital capacitor seat is coaxially arranged at the top end of the upper base; the interdigital capacitor is coaxially mounted at the top of the interdigital capacitor seat; the fixed stud is mounted at the top of the collet chuck; according to the invention, the uncoated harmonic oscillator and the interdigital capacitor can be fixed, the harmonic oscillator can rotate relative to the interdigital capacitor, and the gap between the harmonic oscillator and the interdigital capacitor is ensured.

In wafer-to-wafer bonding, a first die is bonded to a second die at a bonding interface. Various configurations of capacitors are placed along an inner portion of an edge seal of the bonded dies to detect a discontinuity in the bonding interface. These configurations include interdigitated capacitors, which can be horizontally or vertically oriented, parallel-digitated capacitors, and pillars forming a parameter around the dies with conductive portions offset from the pillar and extending inside the dies. Other configurations can be used.

The application discloses a superconducting quantum capacity detector with large saturated power, which comprises a reference ground, a coplanar waveguide transmission line, a superconducting microwave resonator based on a tantalum film and a single Cooper pair box based on aluminum, the superconducting microwave resonator comprises a double helix inductor and an interdigital capacitor, the single Cooper pair box is connected to the interdigital capacitor through aluminum metal wires, the single Cooper pair box and the double helix inductor are located on the same side of the interdigital capacitor, and the single Cooper pair box is located above the double helix inductor, so that the detector unit is more compact, the space utilization is increased, and the number of pixels of a multi-pixel focal plane detector array is increased; the gate capacitor is designed in the shape of a tuning fork, compared with an existing parallel wire structure, double capacitance values can be obtained without increasing the volume of a superconducting island, the smaller the volume of the superconducting island is, the more significant the quantum capacity effect of the detector is, and the more obvious the response is, the larger the gate capacitor is, and the larger the saturated power of the detector is, so that the saturated power can be increased without losing sensitivity.

A self-calibration humidity sensor comprises a substrate, a first insulating layer coated on the substrate, a heating device arranged on the first insulating layer, a second insulating layer coated on the heating device and separated from the first insulating layer, a reference capacitor arranged on the second insulating layer, and a humidity sensing capacitor arranged on the second insulating layer and at the same time arranged above the heating device. The humidity sensing capacitor comprises an interdigital capacitor arranged on the second insulating layer and a layer of humidity sensitive material coated on the interdigital capacitor. By arranging the reference capacitor and the humidity sensing capacitor, the water vapor adsorbed in the layer of humidity sensitive material is evaporated by heating the layer of humidity sensitive material on the humidity sensing capacitor, so that the capacitance value of the humidity sensing capacitor returns to the value of the initial non-humid state, and the calibration of the parameter value of the humidity sensing capacitor is realized by comparison with the reference capacitor, finally realizing the automatic calibration of the humidity sensor, providing the accuracy of the humidity measurement, and avoiding or weakening the measurement error.

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.

Certain aspects of the present disclosure provide an electro-acoustic device and a method of manufacturing such an electro-acoustic device. One example electro-acoustic device generally includes a piezoelectric layer (430), a surface acoustic wave (SAW) resonator (410) disposed above the piezoelectric layer, a non-piezoelectric region (440) disposed adjacent to the piezoelectric layer, and an interdigital transducer capacitor (420) IDC electrically coupled to the SAW resonator and disposed above the non-piezoelectric region.

The invention discloses a compact cavity filter introducing a transmission zero point in a straight-line mode, which comprises an electromagnetic resonant cavity, N-1 coupling control units and N frequency fine tuning units, and N is greater than or equal to 2; the electromagnetic resonant cavity comprises a metal cavity and N resonant rods, the metal cavity is a closed inner cavity formed in a metal block, the interior of the metal cavity is linearly divided into N areas in the left-right direction, the N resonant rods are embedded in the N areas in a one-to-one correspondence mode, and each resonant rod and the inner wall of the metal cavity in the area where the resonant rod is located define a resonant cavity unit; one coupling control unit is arranged between every two adjacent resonant cavity units; the N frequency fine tuning units are in one-to-one correspondence with the N resonant cavity units; a first interdigital capacitor structure is arranged between the top of each resonance rod and the inner top surface of the metal cavity, and a second interdigital capacitor structure is arranged between the front side surface of each resonance rod and the inner wall of the front side of the metal cavity; the invention has the advantages of compact structure and small overall size.

The utility model provides a PCB structure of a network socket capable of reducing crosstalk caused by open twisting of Ethernet twisted pairs, which comprises a first PCB layer, a second PCB layer, a third PCB layer and a fourth PCB layer, and each layer comprises two groups of signal transmission ends which are respectively provided with eight signal transmission ends and are communicated through a transmission line; wherein the first PCB layer comprises a first filtering area, the second PCB layer comprises a second filtering area, the third PCB layer comprises a third filtering area, and the fourth PCB layer comprises a fourth filtering area; each filtering area forms a plurality of interdigital capacitors through transmission line structures of two signal transmission ends so as to reduce crosstalk. The PCB structure of the network socket capable of reducing crosstalk caused by open twisting of the Ethernet twisted pair provided by the utility model has the remarkable beneficial effects that the signal transmission quality is improved, the cost is reduced, and the design flexibility and the product competitiveness are also improved.

The invention relates to the field of accelerometers, in particular to a vertical variable-area differential capacitive accelerometer, which comprises an external frame, a flexible support beam assembly, a sensitive mass block and an interdigital capacitor electrode, the sensitive mass block and the external frame form a symmetrical suspension type rigid connection structure through a flexible supporting beam assembly, and the upper side and the lower side of the symmetrical suspension type rigid connection structure are respectively provided with interdigital capacitance electrodes; the interdigital capacitor electrode comprises a plurality of movable electrode plates which synchronously move along with the sensitive mass block, and a plurality of fixed electrode plates which are fixed on the external frame and are arranged with the plurality of movable electrode plates in a penetrating manner; when the sensitive mass block generates displacement under the action of acceleration in the z-axis direction, the sensitive mass block drives the movable electrode plates on the upper side and the lower side of the sensitive mass block to move relative to the corresponding fixed electrode plates, so that the lateral effective overlapping areas of the interdigital capacitor electrodes on the upper side and the lower side of the sensitive mass block respectively generate linear changes in opposite directions; therefore, a differential capacitance signal in a linear relation with the displacement of the sensitive mass block is output.

The present invention discloses an interdigital capacitor in which excitation of elastic waves is suppressed, and an acoustic wave device including the interdigital capacitor and a resonator. The present invention provides an acoustic wave device comprising a piezoelectric substrate, a resonator formed on the piezoelectric substrate and configured to excite a wave of a main mode, and an interdigital capacitor formed on the piezoelectric substrate and comprising a pair of comb-shaped electrodes and having electrode fingers interdigitated with each other, wherein the electrode fingers of the interdigital capacitor are arranged with a non-uniform pitch so as to excite neither waves of modes other than the main mode nor a wave of the main mode.

The invention provides a band-pass phase shifter and an antenna device, and relates to the technical field of communication. The band-pass phase shifter comprises a first dielectric substrate, a first metal layer, a dielectric function layer, a second metal layer and a second dielectric substrate, the second metal layer comprises a filtering transmission line, the filtering transmission line comprises a pair of dual composite transmission lines, each dual composite transmission line comprises an interdigital capacitor and an electric transmission line, and the interdigital capacitor is connected with the dielectric function layer. Coupling feeding is formed between the electric transmission lines included in the pair of dual composite transmission lines. In the embodiment of the invention, for the dual composite transmission lines included in the filtering transmission line, the filtering characteristic of a certain bandwidth can be realized through the coupling arrangement of a pair of dual composite transmission lines based on the band elimination characteristic of the dual composite transmission lines; meanwhile, based on the arrangement of the dielectric functional layer, the adjustment of the electromagnetic wave phase can be realized by adjusting the dielectric constant of the dielectric functional layer; therefore, while the miniaturization design of the band-pass phase shifter is realized, the phase shifting characteristic and the filtering characteristic of the band-pass phase shifter are ensured.

A charge pump circuit includes a charge pump stage and a filtering stage. The charge pump stage has an output terminal, and the filtering stage is coupled to the output terminal. The filtering stage includes a plurality of low-pass filters coupled in series. Each low-pass filter includes a capacitor assembly. Each capacitor assembly includes a plurality of interdigitated capacitors, and the interdigitated capacitors in one capacitor assembly have a first interdigitated spacing. The interdigitated capacitors of another capacitor assembly have a second interdigitated spacing different from the first interdigitated spacing.

The invention discloses a preparation method of a deep trench capacitor structure based on RDL wiring, and the method comprises the following steps: S1, providing a deep trench capacitor structure which comprises at least two conductive layers with different potentials, and the upper surfaces of the conductive layers are covered by a first interlayer dielectric layer; s2, patterning the first interlayer dielectric layer to form via holes exposing different conductive layers; s3, a first redistribution layer is prepared on the first interlayer dielectric layer, the first redistribution layer comprises two electrode layers which are electrically isolated from each other, the two electrode layers are connected to conductive layers with different potentials respectively, patterns of the at least two electrode layers are alternately arranged on a plane in an interdigital shape or a spiral shape, and the patterns of the at least two electrode layers are arranged on the surface of the first interlayer dielectric layer; therefore, a planar capacitor structure connected in parallel with the deep groove capacitor is formed. According to the invention, the interdigital capacitor is connected in parallel on the basis of the MIM capacitor to form a composite capacitor structure, the advantage of high capacitance density of the DTC is maintained, the equivalent series inductance is reduced, and the working bandwidth of the capacitor is expanded.

The invention belongs to the technical field of antennas, and discloses a flexible tight coupling ultra-wideband antenna for wireless energy collection. The antenna comprises a wide-angle matching layer, a tight coupling antenna unit, an SIW-strip line power divider structure, an interdigital capacitor, an overlapped metal patch and a micro-strip tapered line. The wide-angle matching layer improves radiation efficiency and improves high-frequency-band impedance matching; the tight coupling unit expands the bandwidth through coupling of adjacent dipoles; the SIW-strip line power divider combines the two dipoles into a whole and reduces electromagnetic wave dissipation; the interdigital capacitor and the metal patch enhance high-frequency coupling; and impedance conversion and balance-unbalance conversion are realized by the micro-strip tapered line. According to the invention, the ultra wide band, flexibility and light weight of the antenna are realized.

An ethanol concentration detection system relates to the field of ethanol concentration detection. The problem that miniaturization and high-performance detection of an existing ethanol sensor cannot be considered at the same time is solved. Sensitive elements (interdigital capacitors) are ingeniously integrated at specific angular points of a quadrupole moment sensing topology circuit, high-sensitivity, high-selectivity and high-robustness detection of ethanol concentration, miniaturization of an ethanol sensor and high-performance detection are achieved, and a novel normal form is provided for design of a high-performance chemical sensor. The method is mainly used for ethanol concentration detection.

A single or multiple self-tuning coil element for an MR imaging system is provided. The element is flexible and stretchable and may conform to various body parts and patient sizes. The element may be worn by the patient during the MR imaging session. Each coil may have one or more interdigital capacitors formed of flexible conductive traces. The capacitance of the interdigital capacitor(s) changes under stretching which provides the self-tuning. The traces may be made of liquid metal. The liquid metal may be doped with a contrast agent such that the coil is substantially invisible on an MR image. The coil(s) in a multiple coil element may be arranged in a single or a dual layer.

The invention particularly relates to an asymmetric response superconducting resonator loaded with vertical through holes and interdigital capacitors and a superconducting filter based on the resonator, and belongs to the technical field of high-temperature superconducting circuits and microwave communication. The filter comprises a dielectric substrate, a high-temperature superconducting thin film layer and a circuit constructed on the high-temperature superconducting thin film layer, the circuit comprises four single-ended grounding folded microstrip structures, an interdigital capacitor, a rectangular microstrip block grounding structure, a feeder auxiliary line, an input / output microstrip feeder and a grounding through hole, and four grounding multimode resonators are formed to provide eight pole frequencies. By adjusting the width of the rectangular microstrip block grounding structure and the length and position of the interdigital capacitor, independent regulation and control of odd-even mode frequency and flexible control of a transmission zero point are realized. An additional topological structure is not needed, selectivity and out-of-band rejection performance of the filter are remarkably improved while the size of a device is reduced and low insertion loss is kept, the filter is compatible with an existing thin film process, the miniaturization and batch requirements are met, and the industrialization potential is outstanding.

The present application relates to the technical field of wind turbine blade state monitoring, and discloses a wind turbine blade icing subsection detection method based on multi-modal data fusion. Nodes containing flexible interdigital capacitors, temperature and humidity sensors and vibration sensors are deployed in the tip, middle and root subsections of the blade, and the dielectric constant change is perceived by using the edge electric field effect. A multi-modal cross-validation logic is used, combined with an environmental thermodynamic window to filter out dirt and water film interference, to accurately calculate the thickness of the ice layer. At the same time, PSD analysis of the vibration signal is introduced as a safety bottom logic to identify abnormalities caused by aerodynamic imbalance. The execution module implements differentiated deicing according to the subsection monitoring results, and uses the capacitive signal to capture the critical water film generation time. The present application solves the problems of high false positive rate, inability to monitor in subsections and large deicing energy consumption of the prior art, and has strong engineering applicability.

The invention provides a multi-path impedance circulator structure with interdigital capacitance compensation, and the structure is characterized in that the ends, far away from a central disc, of all microstrip lines of each microstrip line group are set as first interdigital parts which are recessed inwards, and the side, facing the central disc, of a second grounding metal layer is set as a second protruding interdigital part; the first interdigital part and the second interdigital part extend in a mutually staggered manner to form an interdigital capacitor structure, the size of the multi-path adder structure can be greatly reduced under the same bandwidth requirement through the first interdigital capacitor structure, and meanwhile, the overall loss of the multi-path adder structure can be reduced to a certain extent; besides, compensation is carried out through the first interdigital capacitor structure, the freedom degree of the multi-path addition circulator structure is increased, the structure can be conveniently adjusted according to circulators with different indexes, larger bandwidth expansion or out-of-band rejection can be conveniently achieved, and the multi-path addition circulator has good application prospects in the fields of satellite communication, radar, electronic countermeasures and the like.

This invention discloses a novel compact and efficient dual-frequency rectifier based on a dual-composite left- and right-handed harmonic control structure. It includes a dielectric substrate with a dual-frequency matching network, a dual-composite left- and right-handed dual-frequency harmonic control network, a DC blocking capacitor, an RF choke coil, a DC filter, a diode impedance tuning line, and a diode on its upper surface. The lower surface of the dielectric substrate has a metal ground. The dual-frequency matching network consists of two series matching transmission lines. The first end is connected to an RF connector for receiving RF signals, and the second end is connected to the DC blocking capacitor. The dual-composite left- and right-handed dual-frequency harmonic control network integrates an interdigital capacitor and a parallel matching transmission line. The first end is connected to the dual-frequency matching network through the DC blocking capacitor, the second end is connected to the diode impedance tuning line through the diode, and the third end is connected to the DC filter through the RF choke coil. This invention has the advantages of simple structure, high efficiency, and small size, and is suitable for wireless power supply and miniaturized energy harvesting systems.