Cavity filtering jumper and communication system

Abstract

The embodiment of the invention provides a cavity filtering jumper and a communication system, and relates to the technical field of mobile communication. The cavity filtering jumper comprises a dielectric substrate, a first metal layer and a second metal layer, the first metal layer and the second metal layer jointly form a central substrate integrated waveguide cavity and four edge substrate integrated waveguide cavities, the central substrate integrated waveguide cavity is connected to the edge substrate integrated waveguide cavities, and the four edge substrate integrated waveguide cavities are distributed in a central symmetry manner relative to the central point of the central substrate integrated waveguide cavity; the first metal layer is provided with four groups of groove junctions, and each group of groove structure encloses the edge substrate integrated waveguide cavity; the first metal layer is provided with microstrip line feeders, the input port microstrip line feeder and the output port microstrip line feeder which are opposite form energy transmission paths, and the two energy transmission paths are arranged in a broken line mode. According to the cavity filtering jumper and the communication system, the plane size is reduced, the overall compactness is improved, and the stop-band range is further widened.

Description

Technical Field

[0001] This application relates to the field of mobile communication technologies, and particularly to a cavity filter jumper and a communication system. Background Art

[0002] In an indoor distributed mobile communication system, signals need to be distributed from a base station to different antennas or devices indoors, and often face problems such as intersecting energy transmission paths, mutual influence between different antennas, and signal interference from other frequency bands. To solve these problems, a cavity filter jumper with a wide stopband has emerged.

[0003] However, existing wide-stopband cavity filter jumpers usually face the problem of large planar dimensions, resulting in large space occupation. Summary of the Invention

[0004] Embodiments of this application provide a cavity filter jumper and a communication system, which reduce the planar dimensions, improve the overall compactness, and further broaden the stopband range.

[0005] In a first aspect, embodiments of this application provide a cavity filter jumper, including: a dielectric substrate having a first surface and a second surface opposite to each other in the thickness direction; a first metal layer provided on the first surface; a second metal layer provided on the second surface;

[0006] The first metal layer and the second metal layer together form a central substrate integrated waveguide cavity and four edge substrate integrated waveguide cavities. The central substrate integrated waveguide cavity is connected to the edge substrate integrated waveguide cavities, and the four edge substrate integrated waveguide cavities are centrally symmetrically distributed about the center point of the central substrate integrated waveguide cavity; the first metal layer is provided with four groups of groove structures, and each group of groove structures encloses the edge substrate integrated waveguide cavity;

[0007] On opposite sides of the first metal layer along a first direction and on opposite sides along a second direction, microstrip line feeders are respectively provided. The four microstrip line feeders are respectively connected to the four edge substrate integrated waveguide cavities. One of the two opposite microstrip line feeders is an input port microstrip line feeder, and the other is an output port microstrip line feeder.

[0008] The opposite input port microstrip line feeder and output port microstrip line feeder form an energy transmission path, and both of the two energy transmission paths are arranged in a broken line.

[0009] In a possible implementation, the broken line corner of the energy transmission path is located within the edge substrate integrated waveguide cavity.

[0010] In a possible implementation, the area of the edge substrate integrated waveguide cavity is 0.2 - 0.3 times the area of the central substrate integrated waveguide cavity.

[0011] In a possible implementation, the central substrate integrated waveguide cavity is square, and each of the edge substrate integrated waveguide cavities is located at one of the corners of the central substrate integrated waveguide cavity, and any two adjacent edge substrate integrated waveguide cavities are not connected.

[0012] In a possible implementation, a plurality of metal vias are provided on the dielectric substrate, and both the first metal layer and the second metal layer are electrically connected to the metal vias.

[0013] The plurality of metal vias enclose the central substrate integrated waveguide cavity and the edge substrate integrated waveguide cavity.

[0014] In a possible implementation, the edge substrate integrated waveguide cavity includes a first cavity and a second cavity distributed along the side length direction of the central substrate integrated waveguide cavity, and the first cavity and the second cavity communicate with each other.

[0015] The first cavity is provided with a first communication notch communicating with the central substrate integrated waveguide cavity, and the second cavity is provided with a second communication notch for connecting the microstrip line feeder.

[0016] In a possible implementation, the slot structure is disposed adjacent to the metal via, and the slot structure extends along at least one side edge of the corresponding edge substrate integrated waveguide cavity and avoids the first communication notch or the second communication notch.

[0017] In a possible implementation, the slot structure includes a first slot segment and a second slot segment perpendicular to each other.

[0018] In a possible implementation, a coplanar waveguide structure is provided at each portion where each microstrip line feeder is connected to the edge substrate integrated waveguide cavity.

[0019] In a second aspect, an embodiment of the present application further provides a communication system, including the cavity filter jumper in any of the above possible implementations.

[0020] For the cavity filter jumper and the communication system provided by the embodiments of the present application, through the energy transmission path arranged in a broken line and the waveguide cavity structure with central symmetry distribution, the cavity filter jumper realizes not only good filtering performance, but also reduces the planar size, improves the space utilization rate, solves the problem of too large planar size of the traditional wide-stopband cavity filter jumper, and has the characteristics of compactness, stability and flexibility.

[0021] In addition, a waveguide cavity structure constructed using a dielectric substrate and a metal layer thereon achieves efficient energy transmission through a clever microstrip line feeder layout, further broadening the stopband range, enhancing the filtering effect, and ensuring the stability of signal transmission in the cavity filter jumper. Brief Description of the Drawings

[0022] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0023] Figure 1 Schematic structural diagram of the cavity filter jumper provided by the present application;

[0024] Figure 2 Scattering parameter curve diagram of the cavity filter jumper provided by the present application;

[0025] Figure 3 Channel isolation curve diagram of the cavity filter jumper provided by the present application.

[0026] Reference Numerals:

[0027] 100 - Dielectric substrate; 100a - First surface; 100b - Second surface; 110 - Metal via hole;

[0028] 200 - First metal layer; 210 - Groove structure; 211 - First groove section; 212 - Second groove section;

[0029] 300 - Second metal layer;

[0030] 400 - Central substrate integrated waveguide cavity;

[0031] 500 - Edge substrate integrated waveguide cavity; 510 - First cavity; 511 - First communication notch; 520 - Second cavity; 521 - Second communication notch; 530 - Third communication notch;

[0032] 600 - Microstrip line feeder; 610 - Input port microstrip line feeder; 620 - Output port microstrip line feeder;

[0033] 700 - Energy transmission path;

[0034] 800 - Coplanar waveguide structure.

[0035] Through the above accompanying drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These accompanying drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Embodiments

[0036] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0037] In an in-building mobile communication system, signals need to be distributed by a base station to different antennas or devices indoors, and often face problems such as intersecting energy transmission paths, mutual influence between different antennas, and signal interference from other frequency bands. To solve these problems, a cavity filter jumper with a wide stopband has emerged.

[0038] The cavity filter jumper with a wide stopband solves the requirements for signal distribution and frequency selection in the in-building system. By distributing the base station signals to indoor antennas or devices, the wide stopband cavity filter jumper ensures the signal quality, uniformity, and frequency selectivity within the coverage area. At the same time, it also provides a wide range of signal isolation and anti-interference capabilities, maintaining the mutual independence between different signal channels in a wide range. Therefore, the wide stopband cavity filter jumper can achieve efficient signal distribution in the in-building communication system, improve the system performance and reliability, so as to meet the requirements of the in-building communication system for enhanced indoor coverage and frequency-selective distribution.

[0039] On the other hand, substrate integrated waveguide (SIW) has been widely used in the design of passive devices due to its advantages such as high quality factor, high integration, low loss, and low processing cost. In recent years, the wide stopband cavity filter jumper based on SIW mainly realizes the cross-transmission of two mutually isolated channels by exciting the orthogonal degenerate modes in a square resonator, and realizes the high-order filtering effect by coupling multiple resonators around the above-mentioned square cavity, so that the resonators around and the central square resonator have the same operating frequency and the high-order modes are staggered with each other, thereby realizing a wide stopband.

[0040] However, the existing wide stopband cavity filter jumpers usually face the problem of large planar size, resulting in large space occupation, and there is still room for further improvement in the stopband range.

[0041] In view of this, the present application provides a cavity filter jumper and a communication system. Through the energy transmission path set by a broken line and the waveguide cavity structure with central symmetry distribution, the cavity filter jumper realizes not only good filtering performance, but also reduces the planar size, improves the space utilization rate, solves the problem of too large planar size of the traditional wide stopband cavity filter jumper, and has the characteristics of compactness, stability, and flexibility.

[0042] In addition, a waveguide cavity structure constructed using a dielectric substrate and a metal layer thereon achieves efficient energy transmission through a clever microstrip line feeder layout, further broadening the stopband range, improving the filtering effect, and ensuring the stability of signal transmission of the cavity filter jumper.

[0043] The following combines Figures 1 to 3 to describe a cavity filter jumper according to an embodiment of the first aspect of the present application. Optionally, x is the first direction and y is the second direction.

[0044] The cavity filter jumper of this embodiment can be a wide-stopband SIW cavity filter jumper for the 5G n79 band of the indoor distribution system, having advantages such as a compact size, good out-of-band steepness, and a wide stopband range, and can cover the 5G n79 band (4800 MHz - 4900 MHz). This cavity filter jumper achieves good dual-channel energy cross-transmission characteristics and wide-stopband filtering characteristics within the 5G n79 band.

[0045] Combined with Figure 1 , this cavity filter jumper includes a dielectric substrate 100, a first metal layer 200, and a second metal layer 300.

[0046] Among them, the dielectric substrate 100 can use F4B material, with a dielectric constant of 2.2 and a loss tangent value of 0.001 to ensure low-loss transmission. In some examples, the material of the dielectric substrate 100 can also be Rogers RO4003C, Rogers RO4350B, etc. It should be noted that in actual operation, if the material of the dielectric substrate 100 in this example is selected, the device structure parameters need to be readjusted to meet the required operating frequency band and bandwidth requirements.

[0047] The dielectric substrate 100 serves as the basis of the cavity filter jumper and has a first surface 100a and a second surface 100b opposite to each other in the thickness direction. The first metal layer 200 is provided on the first surface 100a, and the second metal layer 300 is provided on the second surface 100b. The first metal layer 200 and the second metal layer 300 together form a central substrate integrated waveguide cavity 400 and four edge substrate integrated waveguide cavities 500. The central substrate integrated waveguide cavity 400 is connected to the edge substrate integrated waveguide cavities 500 to form a complete waveguide system.

[0048] The four edge substrate integrated waveguide cavities 500 are centrally symmetrically distributed about the center point of the central substrate integrated waveguide cavity 400, which helps to enhance the stability and filtering effect of the cavity filter jumper. The first metal layer 200 is provided with four groups of slot structures 210, and each group of slot structures 210 encloses the edge substrate integrated waveguide cavity 500.

[0049] Optionally, in some embodiments, the edge substrate integrated waveguide cavity 500 is 1 / 4 of the central substrate integrated waveguide cavity 400. By using the quarter-set edge substrate integrated waveguide cavity 500 for the filter jumper design, reconstructing the cavity boundary conditions through the slot structure 210, suppressing the high-order harmonics of the quarter-edge substrate integrated waveguide cavity 500 itself, and combining with the harmonic interleaving of the central substrate integrated waveguide cavity 400, the stopband suppression range can be extended to 3.2 times the frequency, and the overall size can also be reduced to less than 25% of the traditional full-mode structure, improving the compactness of the system. Thus, compared with the prior art, this solution has advantages in terms of system size and stopband suppression range.

[0050] On the opposite sides of the first metal layer 200 along the first direction and on the opposite sides along the second direction, microstrip line feeders 600 are respectively provided for feeding signals into the designed device. The four microstrip line feeders 600 are respectively connected to the four edge substrate integrated waveguide cavities 500. One of the two opposite microstrip line feeders 600 is the input port microstrip line feeder 610, and the other is the output port microstrip line feeder 620.

[0051] Optionally, the first direction and the second direction form a preset angle. Preferably, the first direction is perpendicular to the second direction.

[0052] It can be understood that the four microstrip line feeders 600 are respectively connected to the four edge substrate integrated waveguide cavities 500, forming two energy transmission paths 700. Among them, the two opposite microstrip line feeders 600 serve as the input port and the output port respectively, ensuring the effective input and output of signals.

[0053] The opposite input port microstrip line feeder 610 and output port microstrip line feeder 620 form the energy transmission path 700, and the two energy transmission paths 700 are both arranged in a broken line.

[0054] In this way, the two energy transmission paths 700 are both arranged in a broken line, effectively improving the space utilization rate and reducing the planar size, while maintaining good filtering performance and suppressing the leakage and interference of high-frequency signals.

[0055] It can be seen that for the cavity filter jumper designed in this application, through the energy transmission path 700 arranged in a broken line and the waveguide cavity structure with central symmetry distribution, the cavity filter jumper not only maintains good filtering performance, but also reduces the planar size, improves the space utilization rate, solves the problem of too large planar size of the traditional wide-stopband cavity filter jumper, and has the characteristics of compactness, stability and flexibility.

[0056] In addition, the waveguide cavity structure constructed by using the dielectric substrate 100 and the metal layer thereon realizes efficient energy transmission through the ingenious layout of the microstrip line feeder 600, further broadens the stopband range, improves the filtering effect, and ensures the stability of signal transmission of the cavity filter jumper.

[0057] It should be noted that the TE101 mode is excited in the edge substrate integrated waveguide cavity 500, and the TE102 / TE201 mode is excited in the central substrate integrated waveguide cavity 400. The frequencies of the TE101 mode of the edge substrate integrated waveguide cavity 500 and the TE102 / TE201 mode of the central substrate integrated waveguide cavity 400 are kept consistent, and their higher harmonics are interleaved with each other, thus achieving a wide stopband effect. Reference can be made to Figure 2 the shown scattering parameter (S-parameter) curve graph, where the -20 dB stopband extends to 3.2 times the center frequency, and the -40 dB stopband extends to 2.05 times the center frequency, achieving a good stopband suppression effect.

[0058] In addition, the isolation between the two energy transmission paths 700 depends on the orthogonality of the TE102 / TE201 mode excited in the central substrate integrated waveguide cavity 400. When one energy transmission path 700 is operating, the other energy transmission path 700 is always in a zero electric field situation. Reference can be made to Figure 3 the shown channel isolation curve graph, which realizes a -16 dB wide range of inter-channel isolation from 1 to 3.2 times the center frequency.

[0059] In some embodiments, combined with Figure 1 , the folded corner of the energy transmission path 700 is located within the edge substrate integrated waveguide cavity 500.

[0060] It can be understood that when the corner of the energy transmission path 700 is located within the edge substrate integrated waveguide cavity 500, the space can be effectively utilized to reduce the overall size of the cavity filter jumper. In addition, it helps to adjust the transmission characteristics of energy in the waveguide cavity, thereby optimizing the filtering performance of the cavity filter jumper.

[0061] In addition, it can be understood that the edge substrate integrated waveguide cavity 500 has a shielding effect, which can help isolate interference signals outside the energy transmission path 700, improve the anti-interference ability of the cavity filter jumper, and reduce interference and leakage of signals during transmission.

[0062] In some embodiments, combined with Figure 1 , the area of the edge substrate integrated waveguide cavity 500 is 0.2 - 0.3 times the area of the central substrate integrated waveguide cavity 400. Optionally, the area of the edge substrate integrated waveguide cavity 500 can be 0.2 times, or 0.22 times, or 0.25 times, or 0.28 times, or 0.3 times the area of the central substrate integrated waveguide cavity 400.

[0063] Preferably, the area of the edge substrate integrated waveguide cavity 500 can be 0.25 times the area of the central substrate integrated waveguide cavity 400, that is, the area of the edge substrate integrated waveguide cavity 500 can be 1 / 4 of the area of the central substrate integrated waveguide cavity 400.

[0064] By using the quarter-set edge substrate integrated waveguide cavity 500 for the filter jumper design, reconstructing the cavity boundary conditions through the slot structure 210, suppressing the high-order harmonics of the quarter-edge substrate integrated waveguide cavity 500 itself, and combining with the harmonic interleaving of the central substrate integrated waveguide cavity 400, the stopband suppression range can be extended to 3.2 times the frequency, and the overall size can be reduced to less than 25% of the traditional full-mode structure, improving the compactness of the system. Thus, compared with the prior art, this solution has advantages in terms of system size and stopband suppression range.

[0065] It can be understood that through the structure of the edge substrate integrated waveguide cavity 500 designed in this application, the edge substrate integrated waveguide cavity 500 can have a larger reduction compared with the central substrate integrated waveguide cavity 400. In some examples, although the sizes of the edge substrate integrated waveguide cavity 500 and the central substrate integrated waveguide cavity 400 are different, the edge substrate integrated waveguide cavity 500 can still exhibit the same operating frequency.

[0066] It can be seen that the design of the area of the edge substrate integrated waveguide cavity 500 being smaller than the area of the central substrate integrated waveguide cavity 400 helps to ensure a more compact structure design while maintaining the performance of the cavity filter jumper, and also improves the overall space utilization rate.

[0067] In addition, the selection of the area ratio will affect performance parameters such as the frequency response, bandwidth, and out-of-band suppression of the cavity filter jumper. By precisely adjusting the area ratio of the edge substrate integrated waveguide cavity 500 to the central substrate integrated waveguide cavity 400, the filtering performance of the cavity filter jumper can be optimized to meet the usage requirements of the cavity filter jumper.

[0068] Furthermore, the four edge substrate integrated waveguide cavities 500 are centrally symmetrically distributed about the center point of the central substrate integrated waveguide cavity 400, which helps to enhance the structural symmetry of the cavity filter jumper. This structural symmetry design helps to reduce the phase mismatch and loss of signals during transmission, thereby improving the overall performance of the cavity filter jumper.

[0069] In some embodiments, combined with Figure 1 , the central substrate integrated waveguide cavity 400 is square, and each edge substrate integrated waveguide cavity 500 is located at one of the corners of the central substrate integrated waveguide cavity 400, and any two adjacent edge substrate integrated waveguide cavities 500 are not connected.

[0070] Thus, the design of the square central substrate integrated waveguide cavity 400 and the edge substrate integrated waveguide cavities 500 located at its corners further enhances the structural compactness and symmetry of the cavity filter jumper, helps reduce unnecessary space waste, and also improves the performance consistency of the cavity filter jumper in multiple directions.

[0071] In addition, any two adjacent edge substrate integrated waveguide cavities 500 are not connected, avoiding direct coupling and interference of signals between adjacent waveguide cavities. This design helps maintain the purity and stability of signals during transmission and improves the anti-interference ability of the cavity filter jumper.

[0072] The layout of the square central substrate integrated waveguide cavity 400 and the corner edge substrate integrated waveguide cavities 500 also helps to adjust the frequency response and bandwidth of the cavity filter jumper. By controlling the size and shape of the waveguide cavities, the filtering performance of the cavity filter jumper can be optimized to meet the requirements of preset application scenarios.

[0073] It can be seen that by designing the central substrate integrated waveguide cavity 400 as a square, locating each edge substrate integrated waveguide cavity 500 at the corners of the central substrate integrated waveguide cavity 400, and keeping any two adjacent edge substrate integrated waveguide cavities 500 unconnected, it has the characteristics of optimizing the overall structural compactness, reducing signal interference, and optimizing the filtering performance, ensuring the performance and reliability of the cavity filter jumper.

[0074] In some embodiments, combined with Figure 1 , a plurality of metal vias 110 are provided on the dielectric substrate 100, and both the first metal layer 200 and the second metal layer 300 are electrically connected to the metal vias 110. Thus, the metal vias 110 serve as an electrical connection channel between the first metal layer 200 and the second metal layer 300, ensuring the continuity and integrity of signals inside the waveguide cavity. In addition, the metal vias 110 form a continuous metal wall in the vertical direction compared to the first metal layer 200 and the second metal layer 300, playing a good shielding role and effectively preventing signal leakage and interference outside the waveguide cavity.

[0075] In addition, the design of the metal vias 110 also enhances the bonding force between the dielectric substrate 100 and the metal layer, improves the overall structural stability of the cavity filter jumper, and helps the cavity filter jumper maintain stable performance when subjected to external stress or temperature changes.

[0076] By precisely designing the positions, quantities, and dimensions of the metal vias 110, multiple metal vias 110 enclose the central substrate integrated waveguide cavity 400 and the edge substrate integrated waveguide cavity 500. A number of metal vias 110 precisely define the shapes and dimensions of the central substrate integrated waveguide cavity 400 and the edge substrate integrated waveguide cavity 500. Thus, it helps to optimize performance parameters such as the frequency response, bandwidth, and out-of-band rejection of the cavity filter jumper.

[0077] During actual operation, according to the requirements of specific application scenarios, the layout and parameters of the metal vias 110 can be flexibly adjusted to further refine the performance indicators of the cavity filter jumper, thereby ensuring efficient and stable signal transmission in a preset environment and guaranteeing the environmental adaptability of the cavity filter jumper.

[0078] It can be seen that by providing multiple metal vias 110 on the dielectric substrate 100, and both the first metal layer 200 and the second metal layer 300 are electrically connected to these metal vias 110, and further by enclosing the central substrate integrated waveguide cavity 400 and the edge substrate integrated waveguide cavity 500 with multiple metal vias 110, it helps to optimize the electrical performance of the cavity filter jumper, improve the structural stability, and can also enhance the environmental adaptability of the cavity filter jumper.

[0079] In some embodiments, combined with Figure 1 , the edge substrate integrated waveguide cavity 500 includes a first cavity 510 and a second cavity 520 distributed along the side length direction of the central substrate integrated waveguide cavity 400. This distribution method helps to optimize the frequency response and bandwidth of the cavity filter jumper while maintaining structural compactness.

[0080] The first cavity 510 and the second cavity 520 are interconnected. Optionally, the connection method between the first cavity 510 and the second cavity 520 can include openings, gaps, or metal vias on the waveguide wall, etc. Exemplarily, combined with Figure 1 , metal vias can also be provided between the first cavity 510 and the second cavity 520. The connection vias between the first cavity 510 and the second cavity 520 enclose a third connection gap 530 for signal transmission. By precisely controlling the shape and dimensions of the third connection gap 530, the signal transmission path can be further optimized.

[0081] The first cavity 510 is provided with a first connection gap 511 communicating with the central substrate integrated waveguide cavity 400, and the second cavity 520 is provided with a second connection gap 521 for connecting to the microstrip line feeder 600.

[0082] The design of the first connection gap 511 allows signals to be transmitted between the central substrate integrated waveguide cavity 400 and the first cavity 510 of the edge substrate integrated waveguide cavity 500. The design of the second connection gap 521 allows signals to be transmitted from the second cavity 520 of the edge substrate integrated waveguide cavity 500 to the microstrip line feeder 600, or from the microstrip line feeder 600 to the second cavity 520 of the edge substrate integrated waveguide cavity 500.

[0083] Optionally, in actual operation, the shape, size, and position of the first connection gap 511 or the second connection gap 521 can be adjusted according to actual usage requirements to optimize the input or output matching and performance of the cavity filter jumper. Thus, by precisely adjusting the layout and connection method of the edge substrate integrated waveguide cavity 500, the performance of the cavity filter jumper can be optimized to better meet the requirements of the preset application scenario.

[0084] In some embodiments, in combination with Figure 1 , a slot structure 210 is formed on the first metal layer 200 adjacent to the metal vias 110. Optionally, in some embodiments, the slot structure 210 can also be formed on the second metal layer 300.

[0085] Optionally, there are eight slot structures 210, and each slot structure 210 is respectively arranged near the metal vias 110 of any one of the first cavity 510 or the second cavity 520.

[0086] It can be understood that the metal vias 110 form a vertical electrical connection between the metal layers, which is equivalent to forming an electrical wall. The electrical wall can prevent electromagnetic waves from propagating in the direction perpendicular to the metal vias 110, thereby defining the boundary of the waveguide cavity. The slot structure 210 is etched on the metal layer, which is equivalent to forming a magnetic wall. The magnetic wall can guide electromagnetic waves to propagate along the edge of the slot structure 210 and prevent electromagnetic waves from propagating vertically in the plane where the slot structure 210 is located. The slot structure 210 and the metal vias 110 jointly define the shape and boundary of the edge substrate integrated waveguide cavity 500.

[0087] In actual operation, the characteristics such as the resonant frequency, bandwidth, and electromagnetic field distribution of the waveguide cavity can be flexibly controlled by adjusting the shape, size, and position of the slot structure 210, as well as the number and arrangement of the metal vias 110.

[0088] The slot structure 210 extends along at least one side edge of the corresponding edge substrate integrated waveguide cavity 500 and avoids the first connection gap 511 or the second connection gap 521. In combination with Figure 1 it can be seen that the extension direction of the slot structure 210 is the direction of the energy transmission path 700. This layout helps to adjust and optimize the electromagnetic field distribution of the cavity filter jumper and enhance the efficient propagation of signals on the energy transmission path 700.

[0089] In addition, the slot structure 210 is designed to avoid the first communication gap 511 or the second communication gap 521, ensuring that signals can be transmitted smoothly between the cavities and avoiding unnecessary interference and losses.

[0090] Optionally, in actual operation, the depth and width of the slot structure 210 can be adjusted to change the impedance of the magnetic wall, thereby affecting the resonant frequency and bandwidth of the edge substrate integrated waveguide cavity 500.

[0091] Optionally, by adjusting the number and arrangement of the metal vias 110, the electromagnetic field distribution inside the edge substrate integrated waveguide cavity 500 can be controlled, improving the performance of the cavity filter jumper.

[0092] In some embodiments, combined with Figure 1 , the slot structure 210 includes a first slot section 211 and a second slot section 212 that are perpendicular to each other.

[0093] It can be understood that the first slot section 211 and the second slot section 212 are etched on the metal layer and extend along different directions respectively. Thus, the perpendicular layout of the first slot section 211 and the second slot section 212 forms an "L"-shaped structure of the slot structure 210 on the metal layer. Exemplarily, the slot structure 210 is in an "L" shape, and one of the first slot section 211 and the second slot section 212 extends along the long side of the edge substrate integrated waveguide cavity 500, and the other extends along the short side.

[0094] During actual operation, by adjusting the length, width, and position of the first slot section 211 and the second slot section 212, the electromagnetic field distribution and transmission characteristics in the waveguide cavity can be flexibly controlled, thereby optimizing the performance of the cavity filter jumper. This design not only improves the signal transmission efficiency but also reduces electromagnetic interference, ensuring the stability and reliability of the cavity filter jumper in different application scenarios.

[0095] In some embodiments, combined with Figure 1 , a coplanar waveguide structure 800 is provided at each part where each microstrip line feeder 600 is connected to the edge substrate integrated waveguide cavity 500.

[0096] It can be understood that the coplanar waveguide structure 800, as a transition structure between the microstrip line feeder 600 and the edge substrate integrated waveguide cavity 500, can effectively achieve impedance matching and field distribution transition, helping to reduce signal reflection and loss during transmission and improving the transmission efficiency of the cavity filter jumper.

[0097] In addition, the setting of the coplanar waveguide structure 800 can also enhance the coupling between the microstrip line feeder 600 and the edge substrate integrated waveguide cavity 500. By enhancing the coupling, it helps to improve performance parameters such as the bandwidth, out-of-band rejection, and frequency response of the cavity filter jumper.

[0098] Optionally, the shape of the coplanar waveguide structure 800 can be designed as a rectangle or a trapezoid to adapt to the field distribution and impedance characteristics of the microstrip line feeder 600 and the edge substrate integrated waveguide cavity 500.

[0099] In addition, the embodiment of the second aspect of the present application further provides a communication system, including the cavity filter jumper in any of the above embodiments.

[0100] The communication system provided by the present application is designed with the above-mentioned cavity filter jumper. Through the energy transmission path 700 arranged in a broken line and the waveguide cavity structure with central symmetry distribution, the cavity filter jumper not only maintains good filtering performance, but also reduces the planar size, improves the space utilization rate, solves the problem of the too large planar size of the traditional wide-stopband cavity filter jumper, and has the characteristics of compactness, stability and flexibility. In addition, the waveguide cavity structure constructed by using the dielectric substrate 100 and the metal layer thereon realizes the efficient transmission of energy through the ingenious layout of the microstrip line feeder 600, further broadens the stopband range, improves the filtering effect, and ensures the signal transmission stability of the cavity filter jumper.

[0101] Finally, it should be noted that those skilled in the art will easily think of other implementation schemes of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include the common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A cavity filter jumper, characterized in that, Comprising: A dielectric substrate (100) having a first surface (100a) and a second surface (100b) opposite to each other in the thickness direction; A first metal layer (200) provided on the first surface (100a); A second metal layer (300) provided on the second surface (100b); The first metal layer (200) and the second metal layer (300) together form a central substrate integrated waveguide cavity (400) and four edge substrate integrated waveguide cavities (500). The central substrate integrated waveguide cavity (400) is connected to the edge substrate integrated waveguide cavities (500), and the four edge substrate integrated waveguide cavities (500) are centrally symmetrically distributed about the center point of the central substrate integrated waveguide cavity (400). The first metal layer (200) is provided with four groups of groove structures (210), and each group of the groove structures (210) encloses the edge substrate integrated waveguide cavity (500); On opposite sides of the first metal layer (200) along a first direction and on opposite sides along a second direction, microstrip line feeders (600) are respectively provided. The four microstrip line feeders (600) are respectively connected to the four edge substrate integrated waveguide cavities (500). One of the two opposite microstrip line feeders (600) is an input port microstrip line feeder (610), and the other is an output port microstrip line feeder (620). The opposite input port microstrip line feeder (610) and output port microstrip line feeder (620) form an energy transmission path (700), and the two energy transmission paths (700) are both arranged in a broken line.

2. The cavity filter jumper according to claim 1, characterized in that The broken line corner of the energy transmission path (700) is located within the edge substrate integrated waveguide cavity (500).

3. The cavity filter jumper according to claim 1, wherein The area of the edge substrate integrated waveguide cavity (500) is 0.2 - 0.3 times the area of the central substrate integrated waveguide cavity (400).

4. The cavity filter jumper according to claim 1, wherein The central substrate integrated waveguide cavity (400) is square, and each edge substrate integrated waveguide cavity (500) is located at one of the corners of the central substrate integrated waveguide cavity (400), and any two adjacent edge substrate integrated waveguide cavities (500) are not connected.

5. The cavity filter jumper according to any one of claims 1-4, characterized in that, A plurality of metal vias (110) are provided on the dielectric substrate (100), and both the first metal layer (200) and the second metal layer (300) are electrically connected to the metal vias (110). The plurality of metal vias (110) enclose the central substrate integrated waveguide cavity (400) and the edge substrate integrated waveguide cavities (500).

6. The cavity filter jumper according to claim 5, wherein, The edge substrate integrated waveguide cavity (500) includes a first cavity (510) and a second cavity (520) distributed along the side length direction of the central substrate integrated waveguide cavity (400). The first cavity (510) and the second cavity (520) communicate with each other. The first cavity (510) is provided with a first communication gap (511) communicating with the central substrate integrated waveguide cavity (400), and the second cavity (520) is provided with a second communication gap (521) for connecting the microstrip line feeder (600).

7. The cavity filter jumper according to claim 6, wherein, The slot structure (210) is disposed adjacent to the metal via hole (110), and the slot structure (210) extends along at least one side edge of the corresponding edge substrate integrated waveguide cavity (500) and avoids the first communication notch (511) or the second communication notch (521).

8. The cavity filter jumper according to claim 7, wherein The slot structure (210) includes a first slot segment (211) and a second slot segment (212) that are perpendicular to each other.

9. The cavity filter jumper according to any one of claims 1-4, characterized in that A coplanar waveguide structure (800) is provided at each part where each microstrip line feeder (600) is connected to the edge substrate integrated waveguide cavity (500).

10. A communication system, characterized in that, It includes the cavity filter jumper according to any one of claims 1-9.

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