59results about How to "Reduce the size of the inductor" patented technology

The invention discloses a high voltage gain bidirectional DC-DC (direct current-direct current) converter based on switching capacitors and coupling inductors. The high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors is formed by combining Boost convertors, the coupling inductors and the switching capacitors in interleaved mode. An electric circuit of the high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors comprises n / 2 coupling inductors T1[L1, L2], T2[L3, L4]... T(n / 2)[L(n-1), Ln], 2n high frequency power switches S1, S2... Sn and Q1, Q2... Qn, N-1 high frequency switching capacitors C1, C2... C(n-1) and two input and output filter capacitors CL and CH. The high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors can effectively reduce current stress of a low voltage side power device and voltage stress of a high voltage side power device, further reduces the ripple of an input current and decrease the inductor size by using the coupling inductors, improves efficiency of an exchanger, and achieves bidirectional DC-DC conversion high in efficiency and high in voltage gain. According to high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors, an interleaved technology, a magnetic integration technology and a switching capacitor technology are combined, and therefore novel topology of the high voltage gain bidirectional DC-DC converter based on the switching capacitors and the coupling inductors not only has characteristics of being low in ripple of the input current and easy to design in EMT mode of an interleaved converter, but also achieves the purposes that a transformation ratio of input voltage and output voltage is large and switch voltage stress is low.

The invention relates to a three-state three-level PFC circuit, which comprises an inductor, a combined three-state switch, a first capacitor and a second capacitor. The inductor is connected between a first end of an AC power supply and a first end of the combined three-state switch; a second end of the combined three-state switch is connected at a first end of the first capacitor; a third end of the combined three-state switch is connected at a second end of the second capacitor; a fourth end of the combined three-state switch is grounded; and the first end of the first capacitor, a second end of the first capacitor, and the second end of the second capacitor output three-level voltage. The invention also provides a multi-state three-level PFC circuit correspondingly. Compared with the common circuit without a three-state switch or a multi-state switch, the PFC circuit provided by the invention can obviously reduce the dimensions of the inductor and the capacitors, improve the powerfactor of the circuit simultaneously and reduce the total harmonic content on the premise of maintaining the switch frequency and ripples on a passive device invariable, and can reduce the switch frequency and obviously improve the circuit efficiency on the premise of maintaining the input current ripple frequency and magnitude invariable.

The invention relates to a small-sized surface mounting magnetic shielding power inductor and a preparation method of the small-sized surface mounting magnetic shielding power inductor, and belongs to the technical field of inductors. The small-sized surface mounting magnetic shielding power inductor comprises a case magnetic core, a kernel magnetic core and a coil, wherein the coil is arranged around the kernel magnetic core, a position limiting mechanism is arranged inside the case magnetic core, and the kernel magnetic core and the coil are arranged in the case magnetic core through the position limiting mechanism. The small-sized surface mounting magnetic shielding power inductor and the preparation method have the beneficial effects that 1, the inductor size is small, and the mounting height is low; 2, a metal magnetic powder core is adopted as the kernel magnetic core, and the inductor can bear high current due to high saturation magnetization resistance capability; 3, the serialization of the inductance values is realized through adopting the kernel magnetic cores in different sizes and the coils with different numbers of turns; 4, the surface mounting design is adopted, and the mounting is easy.

The invention provides a single inductance double voltage reduction type half-bridge inverter working in half period and a control method thereof, belonging to the inverter and the control method thereof. The single inductance double voltage reduction type half-bridge inverter working in half period consists of a power supply circuit, a voltage reduction circuit and an output filter circuit which are connected one another in sequence, wherein the power supply circuit comprises a first DC power supply and a second DC power supply; the voltage reduction circuit comprises a first voltage reduction circuit and a second voltage reduction circuit; the first voltage reduction circuit comprises a first power switch tube, a first parasitic body diode, a first blocking diode, and a first afterflow diode; the second voltage reduction circuit comprises a second power switch tube, a second parasitic body diode, a second blocking diode, and a second afterflow diode; and the output filter circuit comprises an output filter inductance and an output filter capacitor. The control method obtains a high-low level drive signal of the power switch tube by a voltage and current dual-ring adjuster to realize the half period operation. The inverter has the advantages of small volume, light weight, small waveform distortion, high efficiency and no bias current.

This invention is controlling method of a kind of power factor correction circuit. The method concludes: the rectifier bridge transforms the inputting alternating current voltage to unipolar output voltage and provides to the said BOOST circuit. The said voltage detecting circuit and current detecting circuit provide kinds of needed input to the controller. Based on acquired input, the said controller calculates the switch tube on-and-off driving pulse of the said BOOST circuit. The switch tube of the said BOOST circuit accepts driving wave from the said controller. It makes the shape of inducted currents follow the shape of the input voltage provides by the rectifier bridge. Thus, the power factor correction is completed and the steady direct-current bus voltage output is provided. This invention decreases the system cost. It increases the stability and dynamic capability of circuit. It decreases the inductance ripple wave, radiation and inductance cubage. The efficiency is increased.

The invention discloses a Buck-Boost type bidirectional DC / DC converter with coupled inductors. The Buck-Boost type bidirectional DC / DC converter is characterized in that Buck-Boost type bidirectional DC / DC converter is composed of N paths of bidirectional Buck-Boost circuits through parallel connection, N is greater than or equal to 2 and N is a natural number. Magnetic coupled inductors are adopted to act as the inductors of all the bidirectional Buck-Boost circuits. The coupled inductors are adopted, and the inductors have multiple advantages of high differential mode current sharing inductance, great current sharing effect, small size of the device, low noise and high efficiency under the condition of the same parallel common mode inductance so that equivalent switching frequency can be enhanced, work noise and the size of the inductors can be reduced and conversion efficiency can be enhanced. Both voltage boosting and voltage reduction can be performed in the single direction of the DC / DC converter so that range of application is quite wide.

The invention discloses a half-cycle control tri-level single-inductor dual buck half bridge inverter and a control method thereof, belonging to the field of inverters. The inverter comprises a power circuit, a buck circuit and an output filter circuit, wherein the power circuit comprises a first direct current power and a second direct current power, the buck circuit comprises a first buck circuit and a second buck circuit, and the output filter circuit comprises an output filter inductor and an output filter capacitor. The control method of the inverter is as follows: the high level driving signal and the low level driving signal of a power switch tube are obtained by a voltage and current dual ring regulator, thus realizing half-cycle work. The inverter has small volume, light weight, no offset current, small waveform distortion, and high efficiency.

The invention discloses a novel three-phase line voltage cascading VIENNA converter, and belongs to an AC / DC converter. The converter comprises three-phase alternating current power supplies which are in star connection, nine input inductors and three cascading VIENNA converters. According to the converter, the three-phase input line voltage cascading superposing connection way is adopted to lower the voltage stress of a switch tube and to improve the voltage level, so that the converter can be applied to high-voltage high-power level occasions; in addition, the direct current side can output same or different voltages to supply power to multiple paths of loads concurrently; the active power factor correction can be realized, and the total harmonic distortion (THD) can be lowered; compared with a three-phase fully-controlled type cascading H-bridge rectifier, 27 fully-controlled type electric power semiconductor devices can be reduced by the converters provided by the invention when each of the converter comprises three modules in the cascading connection; compared with a rectifier which adopts all the fully-controlled type electric power semiconductor device and adopts the same three-phase bridge line voltage cascading connection way, a half of the fully-controlled type electric power semiconductor device can be reduced by the converter provided by the invention; and in addition, the voltage withstand of the switch tube can be reduced by half, and the cost and the size of the converter are reduced consequently.

The invention discloses a novel high density integrated electric inductance manufacturing method, which comprises: (1) winding an varnished wire coil into a spiral shape; (2) making first iron magnetic powers into a magnetic core through mechanical pressing; (3) packing the magnetic core into a hollow cavity of the varnished wire coil; (4) packing the varnished wire coil packed with the magnetic core into an injection mold; (5) uniformly mixing and blending resin adhesive, coupling agent and accelerant to obtain high temperature resin adhesive; (6) uniformly mixing and blending the second iron magnetic powers and the high temperature resin adhesive to obtain magnetism composite material; (7) injecting the magnetism composite material into a mold cavity of the injection mold to mold, and solidifying to obtain external magnetic body; and (8) cooling and stripping to obtain molded electric inductance. According to the invention, the volume of the electric inductance manufactured with the method provided herein is small; the density is high; the relative magnetic conductivity is high; the cooling performance is good; the service life is long; the electric inductance is molded as a whole; and the manufacturing method of the electric inductance is simple, thus reducing the production cost.

The invention discloses an AC / DC power supply system which comprises an AC power supply, a power factor correction (PFC) circuit, a control circuit, a bus capacitor, a switching circuit, a DC / DC isolating power stage, an output capacitor and an output load, wherein inputs of a PFC module are the AC power supply; an output of the PFC module is bus voltage; an input of the switching circuit is the bus voltage; outputs of the switching circuit are four terminals; the terminals by two groups are respectively connected with two input ends of a DC / DC module; and output ends of the DC / DC module are connected in parallel, and supply power to the output capacitor and the load. The control circuit sets output voltage of the PFC module according to an effective value or a peak value of detected inputvoltage, and controls operation of the PFC circuit according to a detection signal Vbus_s and a PFC sampling signal, so that a PFC function and bus voltage Vbus stabilization are achieved. In addition, the control circuit controls the switching circuit to change a connection manner of the DC / DC module according to an effective value or a peak value of detected input voltage, or directly changes an operation mode of backward-stage DC / DC by a control signal, so that the power supply system operates in an optimal operation state.

The invention discloses an AAC-based multi-module voltage source type inverter. The AAC-based multi-module voltage source type inverter comprises an LC filter and a full-bridge structure which consists of at least four AAC bridge arms, wherein an H bridge fundamental frequency bridge arm leading-out terminal in an AAC upper bridge arm is connected with a power supply positive electrode output end; an H bridge fundamental frequency bridge arm leading-out terminal in an AAC lower bridge arm is connected with a power supply negative electrode output end; each AAC bridge arm comprises an H bridge unit, a bridge arm electric reactor and a bridge arm conduction switch; each H bridge unit comprises a fundamental frequency bridge arm and a high frequency bridge arm which are connected in parallel; the fundamental frequency bridge arm comprises two series-wound fully-controlled switches with anti-parallel diodes; an emitting electrode of one fully-controlled switch is connected to a collector electrode of the other fully-controlled switch; and the H bridge unit is connected with a voltage-stabilizing capacitor in parallel. The inverter provided by the invention is small in size, and can realize conversion from a low-voltage direct current to a high-voltage alternating current; the system frequency is increased by adopting carrier phase-shifting control; each power switching device suffers from relatively low direct current side voltage; and in addition, the AAC-based multi-module voltage source type inverter is easy to enlarge capacity.

The invention relates to a copper sheet embedded soft magnetic powder core inductor and a preparation method and application thereof. The copper sheet embedded soft magnetic powder core inductor comprises a copper sheet, the surface of the copper sheet is covered with a soft magnetic material, and the interface of the soft magnetic material and the copper sheet contains an insulating resin material; the copper sheet embedded soft magnetic powder core inductor has the characteristics of high density, high magnetic core permeability, high inductance value, high saturation flux density, small size and less magnetic flux leakage; and the copper sheet embedded soft magnetic powder core inductor replacing ferrite inductor with the same inductance is used in a low-voltage DC / DC converter circuit,the copper sheet embedded soft magnetic powder core inductor can obtain consistent or higher efficiency, and meanwhile, the size of the inductor can be reduced by more than half. The withstand voltage of the copper sheet embedded soft magnetic powder core inductor can reach more than 15V, and the preparation method of the copper sheet embedded soft magnetic powder core inductor is simple, high inproduction efficiency and suitable for large-scale automatic production.

The invention discloses a grid-connected inverter and a control method thereof. Key points of the technical scheme are that: the grid-connected inverter consists of six switch tubes, two diodes and two inductors, wherein four of the six switches are in the working frequency mode, the other two switches are in the high frequency mode, and only one switch is in the high frequency mode at moment, so that the switching loss is effectively lowered. In the circuit, a bridge arm is allowed to be connected directly, so that overcurrent is avoided, and high reliability is achieved. In the entire working period, voltages at the two ends of a grounding parasitic capacitor of a photovoltaic system do not contain any high-frequency component, so that the drain current is effectively restrained.

The invention discloses a high-efficiency photovoltaic power optimizer serial topology circuit. The circuit comprises photovoltaic arrays, optimizers and an inductor. The output end of each photovoltaic array is connected in parallel with one optimizer, all the optimizers are successively connected in series in an end-to-end mode to form an optimizer assembly string, and the optimizer assembly string is connected with the input end of an inverter via the inductor and a third switch tube. According to the invention, the optimizers share one inductor so that deviations in maximum power point tracking due to instability of the optimizers can be inhibited, at the same time, the volume of the overall inductor is reduced, materials are reduced, and the manufacturing cost is decreased; and the output line of the optimizer assembly string is provided with the third switch tube, when circuit currents tend to flow back or the currents are zero, the third switch tube is switched off, the currents flow through a third diode, voltage reduction loss of diodes of the circuit is enabled to be eliminated as much as possible when the currents are not interrupted, and the system efficiency is improved. The invention further discloses a control method of a high-efficiency photovoltaic power optimizer serial topology circuit.

The invention discloses an LCL filter with coupled inductors and belongs to the field of design of power electronic devices. The input end of an alternating-current voltage side inductor of the filter is connected with an alternating-current voltage source, a counteracting inductor is connected with the output end of the alternating-current voltage side inductor in parallel after being connected with a filtering capacitor in series, a damping resistor can be connected with the filter capacitor in series or in parallel, or the damping resistor can be not adopted, the alternating-current voltage side filtering inductor and a rectification or inversion side filtering inductor are coupled and connected in series in the forward direction, and the output end of the rectification or inversion side filtering inductor is connected with a middle point of a rectification or inversion bridge arm. According to the LCL filter with the coupled inductors, not only can the size of the filter be reduced, but also the filtering effect can be improved.

The invention discloses a single-phase non-isolated photovoltaic grid-connected inverter and a control method thereof. The single-phase non-isolated photovoltaic grid-connected inverter comprises a photovoltaic cell array module, 6 controllable switch tubes, 2 diodes and 2 inductors. The control method of the single-phase non-isolated photovoltaic grid-connected inverter enables the common mode voltage of the inverter during the overall working period is equal to or is approximate to half of the cell voltage, so that the voltage at two ends of the photovoltaic system grounding stray capacitor has no high frequency components and then the leak current of the non-isolated grid-connected inverter can be eliminated. Only two of the 6 controllable switch tubes in the circuit works in the high frequency mode at any moment, so that the switch loss can be effectively reduced and the conversion frequency can be improved. The single-phase non-isolated photovoltaic grid-connected inverter and the control method thereof are suitable for the photovoltaic grid-connected occasion without isolation of transformers.

The invention provides a load capacitor driver and a driving method thereof. An inductor is used to drive a load capacitor in multiple steps for charging. As multi-step driven charging is approximate to constant-current charging, less power is consumed by a parasitic resistor connected in series into current loop in the charging process, and the efficiency is improved. As a small inductor can be used in multi-step driven charging, the inductor is of a smaller size and can even be integrated with an integrated circuit. Because of short current establishment time of the small inductor, higher driving speed is achieved. According to the invention, a load capacitor can be driven quickly and efficiently, and meanwhile, less inductance is needed, the cost is saved, and the size is reduced. On-chip integration of an inductor is made possible, the cost is saved further, and the size of the driver is reduced.

The invention relates to a bidirectional photovoltaic inverter based on high-frequency legs. The inverter is characterized by comprising at least one forward high-frequency N-cell leg, at least one backward high-frequency N-cell leg and two power-frequency P-cell legs in parallel connection, wherein each forward high-frequency N-cell leg is connected with one inductor to be used as the anode output end of a power supply, and each backward high-frequency N-cell leg is connected with one inductor to be used as the cathode output end of the power supply; and each forward / backward high-frequency N-cell leg is formed by connecting a diode with a high-frequency switch in series, and each power-frequency P-cell leg is formed by connecting a diode with a power-frequency switch in series. The inductors whose currents work in positive half waves are mutually coupled, and the inductors whose currents work in negative half waves are mutually coupled. The bidirectional photovoltaic inverter can be switched between a photovoltaic mode and an energy-storing mode at random, the size of the inverter is small, problems in direction connection can be avoided, current leakage can be effectively inhibited, the system frequency is increased, bidirectional power control is realized, and the capacity is easy to increase.

The invention relates to the technical field of rectifiers, and particularly relates to a double-frequency single-phase PWM rectifier comprising a shell which is internally provided with a circuit board. The circuit board comprises a control unit and a main loop unit. The main loop unit is composed of a low frequency power unit and a high frequency harmonic elimination unit. The required inductance of the power filter can be reduced through the novel topological structure so that the inductor size can be reduced, the cost of the PWM rectifier can be reduced, the control difficulty of the PWM rectifier can be simplified, the switching frequency of the high power switching device can be reduced and the efficiency and the power density of the rectifier can be enhanced.

The present invention relates to a flexible multi-level bridgeless power factor correction converter and a modulation method. The converter comprises a AC inductor part, an electric power electronic switch network and a DC capacitor part, the anode of a diode D1 is connected with the drain of a switching tube S1, and the source of the switching tube S1 is connected with the drain of a switching tube S2; the anode of a diode D2 is connected with the drain of a switching tube S3, the source of the switching tube S3 is connected with the drain of a switching tube S4, and the source of a switching tube S5 is connected with the source of the switching tube S3; the source of a switching tube S6 is connected with the source of the switching tube S1, the cathode of the diode D1 is connected with the cathode of the diode D2, the source of the switching tube S2 is connected with the source of the switching tube S4, and the drain of the switching tube S5 is connected with the drain of the switching tube S6. The flexible multi-level bridgeless power factor correction converter and the modulation method can reduce the inductor loss and size, enable the on-state loss at a low input voltage to be reduced, are smaller in DC capacitance, have higher power density, and can switch the five-level and seven-level two working states flexibly on the condition of not changing the circuit structure.

The invention relates to a suspension potential elimination circuit, which belongs to the technical field of direct current distribution networks. The circuit comprises a first winding with an iron core and an output end used for being connected with a DC / DC module in a direct current transformer, and a first capacitor. One end of the first capacitor is connected with the first winding, and the other end of the first capacitor is connected with a first resistor. The first resistor is connected with an iron core of the first winding. According to the suspension potential elimination circuit, the resistor is connected with the iron core of the first winding, and the resistor is connected with the capacitor, so that the iron core of the winding is electrically connected with the output side of the circuit; the suspension potential of the iron core in the direct current transformer is effectively reduced; the partial discharge phenomenon of the direct current transformer is avoided; and the safety and reliability of the direct current transformer are improved. The suspension potential elimination circuit is suitable for direct current transformers of various structures, such as directcurrent transformers of distributed cascaded topological structures, and can also be applied to power-frequency direct current transformers and high-frequency direct current transformers.

The invention relates to the technical field of electronics, in particular to an inductor and a method for manufacturing the same. The inductor comprises a wound varnished wire and an immobilizing membrane, wherein the varnished wire comprises two leading-out terminals, and the immobilizing membrane is arranged on the surface of the varnished wire and used for fixing the varnished wire. The inductor is at least used for solving the technical problems that in the prior art, an existing magnetic core magnetized inductor is large in size and weight and the application range is narrow.

The invention relates to an anti-electromagnetic-resistance high-power system power supply. The output end of an EMI (Electro Magnetic Interference) filtering unit is connected with a rectifying unit; a first PFC (Power Factor Correction) circuit and a second PFC circuit are connected to the output end of the rectifying unit in a parallel way; the output end of the first PFC circuit and the output end of the second PFC circuit are connected with an energy storage unit; the energy storage unit is connected with the output end through a full-bridge soft switch; a jitter frequency unit is connected with a PFC control circuit; the PFC control circuit is connected with the first PFC circuit and the second PFC circuit; the jitter frequency unit is also connected with a full-bridge control circuit; the full-bridge control circuit is connected with a delay unit; and the delay unit is connected to the full-bridge soft switch. The PFC circuit are set into two paths, so that the current of a power circuit is halved, and di / dt is reduced; the PFC control circuit is provided with the jitter frequency unit, therefore the spectral bandwidth is extended by diffusing the fundamental frequency, the peak energy of the EMI is reduced, the waveform change of the radiation EMI is gentle, the frequency range of EMI filtering is reduced, an EMI filtering circuit is simplified, the EMI inductance value is reduced and the overall efficiency is improved.

The invention discloses a low ripple driving method of an alternating current motor. An adopted power topological structure comprises a high-frequency power switch, a high-frequency diode and a high-frequency direct-current filter inductor, six low-frequency power switches are connected with six low-frequency diodes and three alternating-current filter capacitors in series, and the rotor position,the speed, the stator current and the preceding-stage inductive current of the alternating-current motor are detected. During control, the current amplitude is controlled through high-frequency chopping of the high-frequency power switch, and the current phase is adjusted through the low-frequency power switch. According to the invention, the high-frequency power switch carries out high-frequencychopping, thereby facilitating the reduction of current ripples, and reducing the size of an inductor. The direct-current filter inductor realizes voltage stabilization without a large capacitor; theadoption of the low-frequency power switch is beneficial to the reduction of system cost and switching loss; the alternating-current filter capacitor improves the current harmonic performance and reduces adverse effects caused by high dv / dt; a post-stage control scheme with a constant modulation ratio facilitates the application of various modulation strategies.

The invention discloses a novel high density integrated electric inductance manufacturing method, which comprises: (1) winding an varnished wire coil into a spiral shape; (2) making first iron magnetic powers into a magnetic core through mechanical pressing; (3) packing the magnetic core into a hollow cavity of the varnished wire coil; (4) packing the varnished wire coil packed with the magnetic core into an injection mold; (5) uniformly mixing and blending resin adhesive, coupling agent and accelerant to obtain high temperature resin adhesive; (6) uniformly mixing and blending the second iron magnetic powers and the high temperature resin adhesive to obtain magnetism composite material; (7) injecting the magnetism composite material into a mold cavity of the injection mold to mold, and solidifying to obtain external magnetic body; and (8) cooling and stripping to obtain molded electric inductance. According to the invention, the volume of the electric inductance manufactured with the method provided herein is small; the density is high; the relative magnetic conductivity is high; the cooling performance is good; the service life is long; the electric inductance is molded as a whole; and the manufacturing method of the electric inductance is simple, thus reducing the production cost.

The invention relates to an improved solar charging circuit with an mppt controller. The improved solar charging circuit comprises a main circuit unit, a single-chip microcomputer control unit and an isolation driving unit. The improved solar charging circuit is characterized in that the main circuit unit is composed of two charging loops through parallel connection. The single-chip microcomputer control unit has two paths of out-phase high-frequency pulse square wave output ends. The two paths of out-phase high-frequency pulse square wave output ends are connected with two signal input ends of the isolation driving unit so as to form two paths of high-frequency pulse square wave output structures of the isolation driving unit. The two driving output ends of the isolation driving unit are respectively connected with the control input end of one path of charging loop. The output ends of the two charging loops are connected in parallel to form the electrode of the charging signal output end of the main circuit unit for connecting a storage battery so as to form a multiphase parallel controller charging circuit structure. The single-chip microcomputer control unit performs mppt tracking on a solar panel according to the power generation data of the solar panel obtained through sampling so that output of the solar panel is enabled to be under the state of maximum power. The improved solar charging circuit with the mppt controller structure has the characteristics of low current ripple, low temperature rise of input and output capacitors and long service life of the capacitors.

The invention discloses a buck PFC circuit based on a resonant switched capacitor converter, belongs to the field of power electronics, breaks through the gain limitation when the traditional resonantswitched capacitor converter is applied to a PFC circuit so as to show good performance of power factor correction and the like, and achieves high efficiency and high power density in combination with the advantages of the resonant switched capacitor converter, so that the resonant switched capacitor converter has high application value in occasions with high requirements for the size and the efficiency of the converter, such as a power adapter of portable equipment, and the like.

A DGS lumped parameter low-pass filter based on a multilayer LCP technology is characterized in that a signal input port P1 and a signal output port P4 are symmetrically installed, and a first spiral inductor L1 and a second spiral inductor L2 are installed between the signal input port P1 and the signal output port P4; the first grounding port P2 and the second grounding port P3 are installed on the two sides of the signal input port P1, and the signal output port P4 and the third grounding port P5 are installed on the two sides of the signal output port P4. The filter has the beneficial effects that the filter is simple in structure and adopts a symmetric design, the design efficiency can be greatly improved, and a microwave passive device manufactured by utilizing a multilayer LCP process is small in size, high in stability and low in dielectric loss; inductors, capacitors and other passive devices can be embedded in the multi-layer structure substrate, traditional planar integration of microwave devices is converted into three-dimensional integration, the devices are smaller in size and higher in integration level, and the defected ground structure in the lumped parameter filter can effectively reduce the influence caused by parasitic parameters of the inductors and the capacitors.