106 results about "Waveguide filter" patented technology

The invention provides a dielectric waveguide filter, a construction method and a dielectric waveguide duplexer. The construction method of the dielectric waveguide filter comprises the following steps: selecting a dielectric material based on a given target passband index; establishing a matrix four-mode dielectric waveguide resonator, and adjusting the size of a rectangular dielectric waveguide to enable the resonant mode frequency to reach a target frequency band; carrying out electromagnetic field distribution analysis on a single four-mode dielectric waveguide resonator with a set size, positioning the distribution position of a resonance mode according to the distribution condition of an electromagnetic field, and respectively embedding four blind holes in the position where the electromagnetic field is strongest in distribution so as to realize polarization fixation and frequency regulation and control on the resonance mode; selecting a coupling topology to construct a dielectric filter based on frequency regulation and control of the four-mode dielectric waveguide resonator; the additional coupling blind holes are added on the basis of the coupling topological structure so as to regulate and control the mutual coupling between the adjacent resonators. According to the technical scheme, the problem that the size of a filter in the prior art is large is effectively solved.

The invention provides a high-isolation dual-band substrate integrated waveguide filter crossing device and a working method thereof. Comprising a dielectric layer (2), a top metal layer (1) located on the upper surface of the dielectric layer (2), a middle metal layer (3) located in the dielectric layer (2), a bottom metal layer (4) located on the lower surface of the dielectric layer (2), a first metalized through hole array (5), a second metalized through hole array (6) and a third metalized through hole array (7). The first metalized through hole array (5) penetrates through the dielectric layer (2) and is connected with the top metal layer (1), the middle metal layer (3) and the bottom metal layer (4); the second metalized through hole array (6) is connected with the top metal layer (1) and the middle metal layer (3); the third metalized through hole array (7) is connected with the bottom metal layer (4) and the middle metal layer (3); by applying the technical scheme, dual-band filtering response can be realized.

Here we incorporate waveguide filters into the design of wavelength division multiplexing (WDM) components. Conventionally, such designs are not considered because waveguide filters provide high back-reflection for any wavelengths they don't pass, and such back-reflections are typically intolerable. In this work, this back-reflection problem is alleviated by co-design of a WDM splitter and the waveguide filters such that the design of the WDM splitter accounts for the back-reflections provided by the waveguide filters. This can be regarded as a design that passively routes back-reflections at splitter outputs to the appropriate splitter outputs. Such designs can be obtained by numerical minimization of a cost function, e.g. a cost function that penalizes insertion loss and input back-reflection.

The invention discloses a high-selectivity waveguide filter based on a nonlinear frequency-variable coupling structure, which comprises three rectangular waveguide resonant cavities, an input waveguide port and an output waveguide port, and the first coupling metal column, the first coupling diaphragm, the first coupling metal block and the first metal baffle plate between the first resonant cavity and the second resonant cavity jointly form a first group of nonlinear frequency change coupling structures. And a second coupling metal column, a second coupling diaphragm, a second coupling metal block and a second metal baffle plate between the second rectangular waveguide resonant cavity and the third rectangular waveguide resonant cavity jointly form a second group of nonlinear frequency change coupling structures. The two groups of nonlinear frequency-variable coupling structures are used for coupling the three rectangular waveguide resonant cavities, and a reflection zero point and two transmission zero points are introduced into each rectangular waveguide resonant cavity, so that the filter response is a five-order Chebyshev response with four transmission zero points. The filter has the advantages of being compact in structure, high in selectivity, good in out-of-band rejection performance, simple in structure, easy to expand and the like, and has a good application prospect.

The application discloses a kind of multilayer double-channel substrate integrated waveguide filters, belong to microwave communication technical field, including sequentially stacked multiple SIW cavities, the second metal substrate of top layer SIW cavity is equipped with first direction slot gap;The first metal substrate of bottom layer SIW cavity is equipped with second direction slot gap;In intermediate SIW cavity: the first metal substrate of second layer SIW cavity is equipped with first direction slot gap, the second metal substrate of penultimate layer SIW cavity is equipped with second direction slot gap, and the rest metal substrate is all equipped with the cross slot gap combined into by first direction slot gap and second direction slot gap;First direction slot gap and second direction slot gap are aligned with cross slot gap;Filter first channel includes first input port, all first direction slot gap and first output port;Filter second channel includes second input port, all second direction slot gap and second output port.The application shows good frequency selection characteristic and high channel isolation.

The utility model discloses a waveguide filter bending strength detection device, and relates to the technical field of waveguide filter detection. The waveguide filter bending strength detection device comprises a base, a bending mechanism and a clamping mechanism, a supporting table is arranged over the base, four sets of supporting columns are fixedly installed between the top of the base and the bottom of the supporting table and evenly distributed at the four corners of the bottom of the supporting table, and the clamping mechanism is arranged on the supporting table. The clamping mechanism comprises toothed plates, gears, sliding plates, connecting rods and clamping plates, the two toothed plates are arranged at the bottom of the supporting table in an attached mode, two sliding grooves are formed in the bottom of the supporting table, and the sliding plates slidably installed in the corresponding sliding grooves are fixedly installed at the tops of the two toothed plates correspondingly. According to the waveguide filter bending strength detection device, two groups of clamping plates can be driven to move synchronously by pulling a single connecting rod with a single hand through the clamping mechanism, clamping and fixing are achieved at a time, the operation process is simplified, and the installation efficiency is improved.

The utility model provides a folding type waveguide filter, which relates to the technical field of filters, and comprises an upper cover plate and a lower shell which are fixed through bolts, a partition plate is embedded in the lower shell, one end of the partition plate protrudes, the protruding end and the lower shell form a notch, a plurality of isolation frames integrally formed with the lower shell are arranged in a resonant cavity at intervals, and the upper cover plate and the lower shell are fixed through bolts. Connecting cavity openings are formed in the two ends of every two adjacent isolation frames in a staggered mode, blocking pieces are arranged on the sides, away from the notches, of the connecting cavity openings in the isolation frames, and the blocking pieces and the output end of a motor installed in the lower shell are installed through a transmission mechanism. The transmission mechanism is driven by the motor to drive the blocking piece to move in the connecting cavity opening in parallel, so that the distance between the connecting cavity openings is adjusted, the frequency response characteristic of the resonant cavity can be adjusted to a certain extent, and the high requirement of a modern communication system for the performance of a filter is met. Particularly, the adaptability to different application scenes and frequency requirements is realized.

The invention discloses a folded substrate integrated waveguide filtering crossing device which comprises a top metal layer, a middle metal layer, a bottom metal layer, a dielectric layer, a first metalized through hole array, a second metalized through hole array, a third metalized through hole array and input and output ports. According to the filter crossing device, three cavity cascade paths of FSIW, stacked SIW and FSIW are constructed, coupling between TE0.5, 0 and 1 modes in an FSIW rectangular cavity and a TE101 mode in a middle SIW rectangular cavity is used as a design core, a filtering function is achieved on the basis of completing cross transmission between two channels, and the filter crossing device is simple in design while the compactness and high isolation performance of the structure are kept.

The invention provides a dual-passband waveguide filter and a coupling topology thereof, the dual-passband waveguide filter comprises a metal structure, the interior of the metal structure comprises a torispherical cavity and two sections of feed waveguides, the torispherical cavity is divided into four quarter-spherical cavities by partition plate structures, and the quarter-spherical cavities are communicated with the feed waveguides. Every two adjacent quarter spherical cavities are in coupling connection through a coupling window, and the two feed waveguides are respectively in coupling connection with the two opposite quarter spherical cavities through coupling windows. The dual-passband waveguide filter coupling topology comprises a cellular structure with a resonant node and a non-resonant node, a metal structure is in a physical presentation form of the cellular structure, a quarter spherical cavity is the resonant node, a feed waveguide is the non-resonant node, and the metal structure is a metal structure. According to the coupling topology theory, dual-passband band-pass filtering response of any even order can be realized, and limited transmission zeros are introduced into the lower stop band and the upper stop band of the two passbands at the same time, so that the stop band performance of the dual-passband band-pass filtering response is improved.

Air cavity and ceramic waveguide resonator mixed filter solutions are disclosed. According to one aspect, a combined filter assembly includes an air cavity filter coupled to a ceramic waveguide (CWG) filter. The CWG filter exhibits a wall that presses against a rigid plate. Between the rigid plate and a wall of the air cavity filter is a compressible conductive gasket that is compressed between the wall of the air cavity filter and the rigid plate. The air cavity filter and the CWG filter are secured to a support base. The CWG filter is secured to the support base by flexible clamps that allow for thermal expansion of the CWG filter. The flexible clamps are secured to the support base by screws. The support base exhibits surfaces or walls that receive and anchor the screws.

The invention provides a ceramic waveguide filter with a side-out negative coupling structure, which comprises a dielectric ceramic body, at least four resonance holes, a negative coupling hole and a conductive layer, the upper surface of the dielectric ceramic body is provided with at least four resonance holes, the dielectric ceramic body is divided into at least four resonators, the joint of the four resonators is provided with a line-shaped groove, and the line-shaped groove is connected with the negative coupling hole. The negative coupling hole is arranged at the joint of two adjacent resonators, and the conductive layer is coated on the inner wall surfaces of the resonance hole, the straight slot and the negative coupling hole and the surface of the dielectric ceramic body; the negative coupling hole comprises the first hole penetrating through the side wall of the dielectric ceramic body, so that a side-out negative coupling structure can be formed, zero points are formed on the left side and the right side of a passband respectively, parasitic parameters can be adjusted and the positions of the two zero points can be balanced by adjusting the aperture of the first hole, the limitation during adjustment is small, a connecting rib is abandoned, and the cost is reduced. The influence on the overall strength of the ceramic waveguide filter is small, and the application range can be expanded.

The present invention discloses an integrated microwave ceramic waveguide dual-band filter, belonging to the field of microwave communication technology. The filter comprises: a ceramic dielectric body, and a first dielectric waveguide power divider, a second dielectric waveguide power divider, a first dielectric waveguide filter, a second dielectric waveguide filter, and an impedance matching structure integrated on the ceramic dielectric body; the center frequency of the first dielectric waveguide filter is lower than the center frequency of the second dielectric waveguide filter, and an impedance matching structure is provided between the two dielectric waveguide power dividers and the two dielectric waveguide filters with different center frequencies. The impedance matching structure can be equivalent to a series capacitor and inductor structure, so that when the dual-band filter operates in one frequency band, the impedance mismatch caused by the filter in the other frequency band is suppressed, thereby improving the device's return loss in both frequency bands. The present invention realizes an integrated design of the power divider, impedance matching structure, and filter, which can reduce device production costs, device size, and insertion loss.

The application provides a simulation method for the electro-thermal coupling effect of a substrate integrated waveguide filter, and the method comprises the following steps: S1: extracting the equivalent thermal conductivity of a via array of the substrate integrated waveguide filter; S2: establishing a thermal conduction network of the substrate integrated waveguide filter; S3: obtaining the electromagnetic field distribution of each resonant cavity of the substrate integrated waveguide filter according to the resonant cavity mode theory; S4: based on the electromagnetic field distribution, analytically modeling the electromagnetic loss of the substrate integrated waveguide filter; S5: taking the electromagnetic loss as a heat source, simulating the temperature field distribution of the substrate integrated waveguide filter; and S6: if the deviation of the temperature field calculation results of two times in succession is greater than a set threshold, then the temperature field is updated and optimized, and steps S3 to S5 are repeated until the simulation result converges. The application greatly shortens the time of electro-thermal simulation, and is suitable for the rapid evaluation of the electro-thermal coupling effect of the substrate integrated waveguide filter.

The application discloses a high-isolation substrate integrated waveguide filter cross based on multiple coupling paths, and aims at the problem of poor isolation under an absolute bandwidth of 1.44% or 4.75% in the existing filter cross realized by orthogonal modes. A fifth resonant cavity is arranged in the center of a dielectric substrate, a first resonant cavity, a second resonant cavity, a third resonant cavity and a fourth resonant cavity are arranged around the fifth resonant cavity, the fifth resonant cavity is connected with the first resonant cavity, the second resonant cavity, the third resonant cavity and the fourth resonant cavity, a 180-degree phase difference is generated through two slot openings, and the high-isolation filter cross is realized. Compared with the traditional orthogonal mode realization mode, the isolation is improved by 9dB under the same bandwidth.

The application relates to a Schottky diode-based terahertz frequency conversion component and belongs to the technical field of terahertz communication, wherein the frequency conversion component comprises a local oscillator frequency multiplication link, a terahertz subharmonic mixer and a waveguide filter which are electrically connected in sequence, and the terahertz subharmonic mixer is also electrically connected with an intermediate frequency filter. The Schottky diode is used to manufacture a Q-band tripler, the manufacturing cost is extremely low, the design difficulty of the local oscillator link is reduced, the local oscillator frequency demand is reduced by the harmonic mixer, the testability of the local oscillator link is improved, and the troubleshooting cost and time are reduced.

The embodiment of the application discloses a substrate integrated waveguide passive microwave element based on a sapphire substrate and a processing method and a processing device thereof. The processing method comprises the following steps: etching a sapphire wafer substrate by using a metal-assisted etching method and forming a through hole, depositing metal on the surface of the sapphire wafer and the side wall of the hexagonal through hole, and patterning the metal on the wafer surface by using a photoetching and etching process. The processing device comprises a semiconductor device for metal-assisted etching. The passive microwave element comprises a substrate integrated waveguide filter design matched with the processing method. By using the processing method, the manufacturing cost of the large-size via of the sapphire wafer is greatly reduced, so that after the wafer is divided into a plurality of independent microwave elements, the yield of the elements is greatly improved, and the manufacturing cost of the elements is reduced, which is significantly superior to the traditional laser drilling or mechanical drilling.

This invention discloses a small, low-profile substrate-integrated waveguide filter antenna for the W-band, relating to antenna technology and addressing problems in existing technologies. A rectangular resonant cavity is formed by metal pillars penetrating from the upper copper layer to the bottom copper layer; one end of the rectangular resonant cavity is open as a signal input terminal; four circular holes are arranged in a row and column pattern within the rectangular resonant cavity on the upper copper layer, with a metal circular patch within each hole serving as the corresponding resonator; the four circular holes have equal diameters; the rectangular resonant cavity with the four circular holes is used to excite the TE12 mode; the TE12 mode further excites the TM11 mode on the four metal circular patches (resonators); two of the four resonators are set to diameter D1, and the other two are set to diameter D2; two radiation nulls are generated based on an impedance mismatch method. The advantages are that it achieves a fusion design of the antenna and filter, the entire filter antenna design is compact, it generates two radiation nulls, and the gain reaches 11 dBi.

This utility model belongs to the field of filters, specifically a coaxial-to-waveguide filter, including a cavity with a waveguide port on the inner side. A coaxial connector is bolted to the top side of the waveguide port. Multiple resonant cavities are formed inside the cavity, and a coupling grounding post is installed inside the cavity through the resonant cavities. A coupling conductor is fixed between the waveguide port and one of the resonant cavities through a supporting insulating medium. One end of the coupling conductor is soldered to the coupling grounding post in the corresponding resonant cavity, and the other end extends into the waveguide port, realizing bidirectional coupling transmission of electromagnetic waves. This utility model introduces cross-coupling technology inside the filter, which significantly improves the out-of-band suppression compared to relying on natural attenuation, reduces the number of resonant cavities required to achieve the same suppression, thereby effectively reducing the product size and also reducing the filter insertion loss. This device achieves low port return loss through high out-of-band suppression.

The utility model relates to the technical field of communication waveguide filters, in particular to a device for realizing waveguide filter port time delay intensity adjustability, which comprises a metal cavity and a cover plate covered on the metal cavity, and is characterized by further comprising a metal guide rod, a contact pin structure, a metal tap sheet and a resonant column, the metal guide rod is arranged outside the metal cavity and used for being connected with an external signal port, the resonant column is fixedly arranged in the metal cavity through a screw, the metal tap piece is welded to the side wall of the resonant column, the pin structure is arranged on the side wall of the metal cavity in a penetrating mode, and the inner end, stretching into the metal cavity, of the pin structure is connected with the metal tap piece. The outer end, extending out of the metal cavity, of the pin structure is connected with the metal guide rod. According to the utility model, the adjustability of the time delay strength of the waveguide filter port is realized on the premise of not changing the cavity structure, and the design difficulty and the production cost of the product are reduced.

A waveguide filter may include a waveguide conduit through which an electromagnetic wave propagates. The waveguide filter may include a resonant cavity comprising at least a portion of the waveguide conduit. The waveguide filter may include a variable dielectric material disposed adjacent to the resonant cavity. The waveguide filter may include a tuning electrode to apply an electric field through the variable dielectric material for modification of a permittivity of the variable dielectric material.

The utility model relates to the technical field of waveguide filters, and provides an improved high-power waveguide filter which comprises a base, a fixing frame is arranged above the base, a supporting block is fixed to the edge of the bottom face of the fixing frame, the lower end of the supporting block is fixed to the top face of the base, and a rotating hole is formed in the middle of the top face of the inner side of the fixing frame. A rotating plate is arranged below the rotating hole, and a rotating shaft is fixed to the edge of the top face of the rotating plate. The two semicircular blocks are clamped into the inner sides of the two semicircular grooves in the side wall of the mounting plate to fix the mounting plate, mounting of the filter body is completed, and the filter body can be mounted only by rotating the rotating plate by 180 degrees, driving the second gear to rotate by the rotating plate, driving the first gear to rotate by the second gear and driving the semicircular blocks to rotate by the first gear. And the semicircular block can be completely moved out of the inner side of the semicircular groove after rotating by 180 degrees, so that the filter body can be disassembled, the operation is simple and convenient, and quick disassembly and maintenance when a fault occurs are facilitated.

The invention discloses a cross coupling substrate integrated waveguide filter, comprising a dielectric plate layer, the upper surface of which is coated with a first metal coating and the lower surface of which is coated with a second metal coating; the plurality of metal through holes are arranged in a shape like a Chinese character'tian ', penetrate through the first metal coating, the dielectric layer plate and the second metal coating and are used for separating and forming resonant cavities; a plurality of areas without the metal through holes exist in the array of the metal through holes arranged in the shape of the Chinese character'tian '; the resonant cavity is defined by metal through holes and is used for storing and selecting electromagnetic energy with specific frequency; the resonant cavity comprises a first resonant cavity and a fourth resonant cavity; the inductive windows are arranged between every two adjacent resonant cavities, are positioned in areas without the metal through holes, and are used for coupling magnetic fields in every two adjacent resonant cavities; and the rectangular groove is arranged between the first resonant cavity and the fourth resonant cavity so as to introduce capacitive cross coupling. The substrate integrated waveguide filter integrates miniaturization and high performance, and is high in frequency selection and out-of-band rejection capability.

The application provides a pre-protection filter for superconducting tokamak millimeter wave diagnosis, and belongs to the technical field of magnetic confinement fusion plasma diagnosis, which can ensure the safety of sensitive millimeter wave receivers while keeping the integrity of the frequency spectrum, polarization and phase information of the to-be-measured signal to the maximum. The application adopts a single-band multi-section waveguide filter structure, which includes a band-pass filter for low-frequency band interference, a notch filter for interference in the diagnostic frequency band, and a low-pass filter for high-frequency band interference. The application can effectively protect against interference of different auxiliary heating frequency points and realize high-fidelity transmission of the received signal.

The polarization filtering structure comprises a section of tapering waveguide and at least one bent waveguide, a mode hybridization effect is generated in the tapering waveguide, a TM fundamental mode in the tapering waveguide is converted into a TE1 mode, the bent waveguide filters the TE1 mode, and only a TE fundamental mode is left; the intensity of the mode hybridization effect is evaluated according to an intensity coefficient k, the larger the k value is, the more obvious the mode hybridization effect is, and the shorter the required tapering waveguide length is. The invention has the advantages that the TM mode in the waveguide is converted into the TE1 mode through the tapering structure of the waveguide by utilizing the mode hybridization effect in the tapering waveguide, and the TE1 mode and other high-order modes with the same polarization are filtered out by connecting a plurality of bent waveguide structures, so that only the TE fundamental mode is ensured in the waveguide.

Provided herein is a waveguide filter that may include a waveguide conduit through which electromagnetic waves propagate. The waveguide filter may include a resonant cavity including at least a portion of the waveguide conduit. The waveguide filter may include a variable dielectric material disposed adjacent to the resonant cavity. The waveguide filter may include a tuning electrode for applying an electric field through the variable dielectric material to modify a dielectric constant of the variable dielectric material.

According to the multilayer dual-channel substrate integrated waveguide filter, a cross slot is formed in a metal substrate between adjacent SIW cavities, the intersection point of the cross slot is located in the center of the SIW cavity and located at the strongest magnetic field position of a TE102 mode and a TE201 mode, the TE102 / TE201 mode and a TE101 mode can be physically segmented, the isolation degree is improved, and meanwhile, the cross slot is formed in the metal substrate between the adjacent SIW cavities; according to the invention, a multi-layer structure is adopted, strong coupling and energy transmission of two orthogonal modes TE102 and TE201 can be realized, and the unique orthogonal mode coupling mechanism is combined with the multi-layer structure, so that the structure shows good frequency selection characteristics and high channel isolation while keeping a compact size, and mode interference and crosstalk of a traditional multi-channel filter do not exist; and a high-performance dual-passband filtering function is realized.

The application discloses a micro substrate integrated waveguide filter with in-band ripple suppression, a wide-stop-band band-pass filter adopts a single-cavity substrate integrated waveguide structure, four novel complementary open-loop resonant rings with the same shape are etched on the upper layer metal of the resonant cavity and are recorded as wide-stop-band resonant rings, a capacitive slot line is etched on the middle position of the upper layer metal along the longitudinal direction and is recorded as a wide-stop-band capacitive slot line, and the lower layer metal is etched to form a defect ground; a dual-band band-pass filter adopts a single-cavity substrate integrated waveguide structure, four novel complementary open-loop resonant rings are etched on the upper layer metal of the resonant cavity, the four open-loop resonant rings are divided into two groups according to the size and are recorded as large resonant rings and small resonant rings, a capacitive slot line is etched on the middle position of the upper layer metal along the longitudinal direction and is recorded as a dual-band capacitive slot line, a grid-shaped slot line is etched along the transverse direction, a symmetrical slot microstrip line is etched at the tapered interface of the upper layer metal, a metal counterbore is arranged in the resonant cavity, and a slow-wave substrate integrated waveguide structure is formed by connecting a circuit ground plane.

The invention discloses a multi-band common orthogonal head, and belongs to the technical field of microwave communication. The invention discloses a four-way symmetrical waveguide filter which comprises an axial multi-frequency shared waveguide assembly and four side wall branch waveguides, the axial multi-frequency shared waveguide assembly comprises a coupling waveguide, a corrugated groove gasket and a high-frequency waveguide, the side wall branch waveguides are uniformly distributed in a four-way symmetrical mode relative to the multi-frequency shared waveguide assembly, and each side wall branch waveguide comprises an evanescent mode filter and an impedance conversion section. The antenna has the advantages of being large in bandwidth, small in frequency band interval, compact in structure and easy to machine. According to the invention, the problems of mixed-mode suppression, small-frequency-band interval electrical design and difficult processing of a millimeter wave band structure during ultra-wideband use are solved, the influence of a high-order mode on a directional diagram of a feed source system can be effectively improved, the cross polarization of the antenna is reduced, and the antenna is suitable for engineering popularization.

The application discloses a switchable filter based on a material waveguide band-pass band-stop, and belongs to the technical field of high-power microwave material wave filter. The filter comprises a rectangular waveguide, at least one microstrip spiral resonant loop circuit board and a waveguide external shielding cavity. The microstrip spiral resonant circuit board is placed in the rectangular waveguide, the first end and the last end of the spiral microstrip line are provided with PIN diodes and extend out through a gap, and the PIN diodes are placed in the waveguide external shielding cavity. The application controls the switching of the resonant state through the PIN diodes, so that the nanosecond-level electrically-controlled fast switching of the band-pass-band-stop state of the waveguide structure is realized. In addition, the PIN diodes are placed outside the waveguide, so that the high-power capacity compared with the traditional waveguide filter can be realized.

The application discloses a half-mode SSPPs substrate integrated waveguide filter and a satellite communication integrated circuit. The half-mode SSPPs substrate integrated waveguide filter comprises a dielectric substrate and a metal patch; the metal patch comprises a rectangular area and a strip area connected to two sides of the rectangular area; a plurality of slot units are arranged on a lower side of the rectangular area and periodically arranged along edges of the half-mode length direction as artificial surface plasmon transmission devices; wherein each slot unit has a meander-shaped slot. The application provides a new solution for effective constraint and propagation of high-order modes of SSPPs by using the meander-shaped slot arranged periodically to form a meander-shaped SSPPs structure. Meanwhile, the structure is embedded into a substrate integrated waveguide to form a band-pass filter response, compared with a traditional SSPPs substrate integrated waveguide structure, a larger high-frequency cutoff frequency adjustment range can be realized, and compared with a basic mode, the band-pass filter response has a wider bandwidth.