Cavity filter jumper and communication system

Abstract

The embodiment of the present application provides a cavity filter jumper and a communication system, which relate to the field of mobile communication technology. The cavity filter jumper includes a dielectric substrate, a first metal layer and a second metal layer; the first metal layer and the second metal layer together constitute 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 cavity, 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 slot junctions, and each group of slot structures surrounds the edge substrate integrated waveguide cavity; the first metal layer is provided with a microstrip line feeder, and the relative input port microstrip line feeder and output port microstrip line feeder constitute an energy transmission path, and both energy transmission paths are arranged in a zigzag line. The cavity filter jumper and communication system reduce the planar size, improve the overall compactness, and further widen the stopband range.

Description

Technical Field

[0001] The present application relates to the field of mobile communication technology, and in particular to a cavity filter jumper and a communication system. Background Art

[0002] In indoor mobile communication systems, signals must be distributed by base stations to different indoor antennas or devices. This often leads to problems such as intersecting energy transmission paths, mutual interference between different antennas, and interference from signals in other frequency bands. To address these issues, cavity filter jumpers with wide stopbands have emerged.

[0003] However, existing wide stopband cavity filter jumpers usually have a large planar size, resulting in a large space occupation. Summary of the Invention

[0004] The embodiments of the present application provide a cavity filter jumper and a communication system, which reduce the planar size, improve the overall compactness, and further widen the stopband range.

[0005] In a first aspect, an embodiment of the present application provides a cavity filter jumper, comprising: a dielectric substrate having a first surface and a second surface opposite to each other along a thickness direction; a first metal layer disposed on the first surface; and a second metal layer disposed on the second surface.

[0006] The first metal layer and the second metal layer together constitute 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 cavity, 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, each group of the groove structures enclosing the edge substrate integrated waveguide cavity;

[0007] Microstrip line feeders are provided on opposite sides of the first metal layer along the first direction and on opposite sides of the second direction, respectively. 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 input port microstrip line feeder and the output port microstrip line feeder that are opposite to each other form an energy transmission path, and both of the energy transmission paths are arranged in a broken line.

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

[0011] In a possible implementation, the central substrate integrated waveguide cavity is square, each of the edge substrate integrated waveguide cavities is located at one corner 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 the first metal layer and the second metal layer are both 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 are connected to each other.

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

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

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

[0018] In a possible implementation, a coplanar waveguide structure is provided at a portion where each of the microstrip line feeders 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, comprising the cavity filter jumper in any of the possible implementations described above.

[0020] The cavity filter jumper and communication system provided in the embodiments of the present application, through the zigzag energy transmission path and the centrally symmetrically distributed waveguide cavity structure, achieves that the cavity filter jumper not only maintains good filtering performance, but also reduces the planar size and improves space utilization, solving the problem of excessive planar size of traditional wide-stopband cavity filter jumpers, and has the characteristics of compactness, stability and flexibility.

[0021] In addition, the waveguide cavity structure constructed using the dielectric substrate and the metal layer on it achieves efficient energy transmission through a clever microstrip line feeder layout, further widens the stopband range, improves the filtering effect, and ensures the stability of signal transmission in the cavity filter jumper. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] Figure 1 A schematic diagram of the structure of the cavity filter jumper provided in this application;

[0024] Figure 2 A graph showing the scattering parameters of the cavity filter jumper provided in this application;

[0025] Figure 3 This is a channel isolation curve diagram of the cavity filter jumper provided in this application.

[0026] Reference numerals:

[0027] 100 - dielectric substrate; 100a - first surface; 100b - second surface; 110 - metal via;

[0028] 200 - first metal layer; 210 - slot structure; 211 - first slot section; 212 - second slot section;

[0029] 300- second metal layer;

[0030] 400-center substrate integrated waveguide cavity;

[0031] 500 - edge substrate integrated waveguide cavity; 510 - first cavity; 511 - first communication gap; 520 - second cavity; 521 - second communication gap; 530 - third communication gap;

[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] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0037] In indoor mobile communication systems, signals must be distributed by base stations to different indoor antennas or devices. This often leads to problems such as intersecting energy transmission paths, mutual interference between different antennas, and interference from signals in other frequency bands. To address these issues, cavity filter jumpers with wide stopbands have emerged.

[0038] Wide-stopband cavity filter jumpers address the signal distribution and frequency selection requirements of indoor distributed communication systems. By distributing base station signals to indoor antennas or devices, wide-stopband cavity filter jumpers ensure signal quality, uniformity, and frequency selectivity within the coverage area. They also provide wide-range signal isolation and interference immunity, maintaining the independence of different signal channels over a wide range. Therefore, wide-stopband cavity filter jumpers enable efficient signal distribution in indoor distributed communication systems, improving system performance and reliability, and meeting the requirements for enhanced indoor coverage and frequency selectivity.

[0039] On the other hand, substrate integrated waveguides (SIWs) are widely used in passive device design due to their high quality factor, high integration density, low loss, and low processing cost. In recent years, wide-stopband cavity filter jumpers based on SIWs have been developed. This approach primarily excites orthogonal degenerate modes in a square resonant cavity to achieve cross-transmission between two isolated channels. High-order filtering is achieved by coupling multiple resonant cavities around the square cavity, ensuring that the surrounding resonant cavities operate at the same frequency as the central square resonant cavity, allowing high-order modes to interleave, thereby achieving a wide stopband.

[0040] However, existing wide stopband cavity filter jumpers usually have a large planar size, resulting in a large space occupation, and the stopband range still has room for further improvement.

[0041] In view of this, the present application provides a cavity filter jumper and a communication system. Through the energy transmission path arranged in a broken line and the waveguide cavity structure with a central symmetrical distribution, the cavity filter jumper achieves good filtering performance while reducing the planar size and improving space utilization, solving the problem of excessive planar size of traditional wide-stopband cavity filter jumpers, and has the characteristics of compactness, stability and flexibility.

[0042] In addition, the waveguide cavity structure constructed using the dielectric substrate and the metal layer on it achieves efficient energy transmission through a clever microstrip line feeder layout, further widens the stopband range, improves the filtering effect, and ensures the stability of signal transmission in the cavity filter jumper.

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

[0044] The cavity filter jumper in this embodiment is a wide-stopband SIW cavity filter jumper for the 5Gn79 frequency band in indoor distributed systems. It features compact size, excellent out-of-band steepness, and a wide stopband range, covering the 5Gn79 frequency band (4800MHz-4900MHz). This cavity filter jumper achieves excellent dual-channel energy cross-transmission characteristics and wide stopband filtering within the 5Gn79 frequency band.

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

[0046] The dielectric substrate 100 can be made of F4B material, which has a dielectric constant of 2.2 and a loss tangent of 0.001, ensuring low-loss transmission. In some examples, the dielectric substrate 100 can also be made of materials such as Rogers RO4003C or Rogers RO4350B. It should be noted that in actual operation, if the dielectric substrate 100 material in this example is selected, the device structural parameters must be readjusted to meet the required operating frequency and bandwidth requirements.

[0047] The dielectric substrate 100 serves as the foundation of the cavity filter jumper and has a first surface 100a and a second surface 100b that oppose each other along the thickness direction. A first metal layer 200 is disposed on the first surface 100a, and a second metal layer 300 is disposed on the second surface 100b. Together, the first and second metal layers 200 and 300 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, forming 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 enhance the stability and filtering effect of the cavity filter jumper. The first metal layer 200 is provided with four groups of groove structures 210, each group of groove structures 210 enclosing an edge substrate integrated waveguide cavity 500.

[0049] Optionally, in some embodiments, the edge substrate integrated waveguide cavity 500 is 1 / 4 the size of the center substrate integrated waveguide cavity 400. By using a quarter of the edge substrate integrated waveguide cavity 500 for filter jumper design, reconstructing the cavity boundary conditions through the slot structure 210, suppressing the high-order harmonics of the quarter of the edge substrate integrated waveguide cavity 500 itself, and combining it with the harmonic interleaving of the center 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 that of a traditional full-mode structure, thereby improving the compactness of the system. As such, compared with the existing technology, this solution has advantages in both system size and stopband suppression range.

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

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

[0052] It is understood that the four microstrip feed lines 600 are respectively connected to the four edge substrate integrated waveguide cavities 500, forming two energy transmission paths 700. The two opposite microstrip feed lines 600 serve as input ports and output ports, respectively, ensuring effective input and output of signals.

[0053] The input port microstrip line feeder 610 and the output port microstrip line feeder 620 that are opposite to each other form an energy transmission path 700 , and both energy transmission paths 700 are arranged in a zigzag pattern.

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

[0055] It can be seen that the cavity filter jumper designed in the present application, through the broken line energy transmission path 700 and the centrally symmetrically distributed waveguide cavity structure, achieves that while maintaining good filtering performance, the cavity filter jumper also reduces the planar size and improves space utilization, solving the problem of excessive planar size of traditional wide-stopband cavity filter jumpers, and has the characteristics of compactness, stability and flexibility.

[0056] In addition, the waveguide cavity structure constructed using the dielectric substrate 100 and the metal layer thereon achieves efficient energy transmission through a clever layout of the microstrip line feeder 600, further widens the stopband range, improves the filtering effect, and ensures the stability of the 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 center substrate integrated waveguide cavity 400. The TE101 mode frequency of the edge substrate integrated waveguide cavity 500 is consistent with the TE102 / TE201 mode frequency of the center substrate integrated waveguide cavity 400, and their high-order harmonics are intertwined, thereby achieving a wide stopband effect. Figure 2 As shown in the scattering parameter (S parameter) curve, the -20dB stopband extends to 3.2 times the center frequency, and the -40dB stopband extends to 2.05 times the center frequency, achieving good stopband suppression effect.

[0058] In addition, the isolation between the two energy transmission paths 700 depends on the orthogonality of the TE102 / TE201 modes excited by the central substrate integrated waveguide cavity 400. When one energy transmission path 700 is working, the other energy transmission path 700 is always in a field-free state. Figure 3 The channel isolation curve shown in the figure achieves a wide range of inter-channel isolation of 1 to 3.2 times the center frequency -16dB.

[0059] In some embodiments, combined Figure 1 The broken line corner of the energy transmission path 700 is located in the edge substrate integrated waveguide cavity 500 .

[0060] It can be understood that when the corner of the energy transmission path 700 is located in the edge substrate integrated waveguide cavity 500, the space can be effectively utilized and the overall size of the cavity filter jumper can be reduced. In addition, it also helps to adjust the energy transmission characteristics 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 Figure 1 The area of ​​the edge substrate integrated waveguide cavity 500 is 0.2-0.3 times the area of ​​the center substrate integrated waveguide cavity 400. Optionally, the area of ​​the edge substrate integrated waveguide cavity 500 may be 0.2 times, 0.22 times, 0.25 times, 0.28 times, or 0.3 times the area of ​​the center substrate integrated waveguide cavity 400.

[0063] Preferably, the area of ​​the edge substrate integrated waveguide cavity 500 may 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 may be 1 / 4 of the area of ​​the central substrate integrated waveguide cavity 400 .

[0064] By using a quarter of the edge substrate integrated waveguide cavity 500 for filter jumper design, reconstructing the cavity boundary conditions through the slot structure 210, suppressing the high-order harmonics of the quarter of the edge substrate integrated waveguide cavity 500 itself, and combining 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, thereby improving the compactness of the system. Thus, compared with the existing technology, this solution has advantages in terms of system size and stopband suppression range.

[0065] It is 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 be significantly smaller than the center substrate integrated waveguide cavity 400. In some examples, although the edge substrate integrated waveguide cavity 500 and the center substrate integrated waveguide cavity 400 have different sizes, the edge substrate integrated waveguide cavity 500 can still exhibit the same operating frequency.

[0066] It can be seen that the design of the edge substrate integrated waveguide cavity 500 having a smaller area than the center substrate integrated waveguide cavity 400 helps to ensure that the cavity filter jumper maintains performance while achieving a more compact structural design and improving overall space utilization.

[0067] In addition, the selection of the area ratio will affect the performance parameters of the cavity filter jumper, such as the frequency response, bandwidth, and out-of-band suppression. By precisely adjusting the area ratio of the edge substrate integrated waveguide cavity 500 to the center 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 the signal during transmission, thereby improving the overall performance of the cavity filter jumper.

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

[0070] In this way, the design of the square central substrate integrated waveguide cavity 400 and the edge substrate integrated waveguide cavity 500 located at its corners further enhances the compactness and symmetry of the cavity filter jumper structure, helps reduce unnecessary space waste, and 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, which avoids direct coupling and interference of signals between adjacent waveguide cavities. This design helps to maintain the purity and stability of the signal during transmission and improves the anti-interference ability of the cavity filter jumper.

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

[0073] It can be seen that by designing the central substrate integrated waveguide cavity 400 into a square shape and locating each edge substrate integrated waveguide cavity 500 at the corner 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 filtering performance, thereby ensuring the performance and reliability of the cavity filter jumper.

[0074] In some embodiments, combined Figure 1 The dielectric substrate 100 is provided with a plurality of metal vias 110, and the first metal layer 200 and the second metal layer 300 are both electrically connected to the metal vias 110. Thus, the metal vias 110 serve as electrical connection channels between the first metal layer 200 and the second metal layer 300, ensuring the continuity and integrity of the signal within the waveguide cavity. Furthermore, the metal vias 110 form a continuous metal wall in a direction perpendicular to the first metal layer 200 and the second metal layer 300, providing excellent shielding, 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 position, number, and size 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. The metal vias 110 precisely define the shape and size of the central substrate integrated waveguide cavity 400 and the edge substrate integrated waveguide cavity 500, thereby helping to optimize the performance parameters of the cavity filter jumper, such as frequency response, bandwidth, and out-of-band suppression.

[0077] In actual operation, the layout and parameters of the metal vias 110 can be flexibly adjusted according to the requirements of specific application scenarios to further refine the performance indicators of the cavity filter jumper, thereby ensuring efficient and stable signal transmission in a preset environment and ensuring 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 the first metal layer 200 and the second metal layer 300 are electrically connected to these metal vias 110, and the multiple metal vias 110 are used to enclose the central substrate integrated waveguide cavity 400 and the edge substrate integrated waveguide cavity 500, it is helpful to optimize the electrical performance of the cavity filter jumper, improve the structural stability, and enhance the environmental adaptability of the cavity filter jumper.

[0079] In some embodiments, combined 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 a compact structure.

[0080] The first cavity 510 and the second cavity 520 are connected to each other. Optionally, the connection between the first cavity 510 and the second cavity 520 may be an opening, a gap or a metal through hole on the waveguide wall. For example, Figure 1 A metal through hole can also be set between the first cavity 510 and the second cavity 520. The connecting through hole between the first cavity 510 and the second cavity 520 surrounds a third connecting gap 530. The third connecting gap 530 is used for signal transmission. By precisely controlling the shape and size of the third connecting gap 530, the signal transmission path can be further optimized.

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

[0082] The design of the first connecting gap 511 allows signals to be transmitted between the center substrate integrated waveguide cavity 400 and the first cavity 510 of the edge substrate integrated waveguide cavity 500, and the design of the second connecting 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 connecting gap 511 or the second connecting gap 521 can be adjusted according to actual usage requirements to optimize the input or output matching and performance of the cavity filter jumper. In this way, 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 needs of the preset application scenario.

[0084] In some embodiments, combined Figure 1 The first metal layer 200 is provided with a groove structure 210 adjacent to the metal via 110. Optionally, in some embodiments, the groove structure 210 may also be provided on the second metal layer 300.

[0085] Optionally, eight slot structures 210 are provided, and each slot structure 210 is respectively disposed adjacent to the metal via 110 of any first cavity 510 or second cavity 520 .

[0086] It is understood that the metal vias 110 form vertical electrical connections between metal layers, which is equivalent to forming an electric wall. The electric wall can prevent electromagnetic waves from propagating in a direction perpendicular to the metal vias 110, thereby defining the boundary of the waveguide cavity. The slot structure 210 is etched into 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 while preventing electromagnetic waves from propagating perpendicular to the plane of the slot structure 210. The slot structure 210 and the metal vias 110 together define the shape and boundary of the edge substrate integrated waveguide cavity 500.

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

[0088] The groove structure 210 extends along at least one side edge of the corresponding edge substrate integrated waveguide cavity 500 and avoids the first communication gap 511 or the second communication gap 521. 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 the signal can be smoothly transmitted between the chambers and avoiding unnecessary interference and loss.

[0090] Optionally, in actual operation, the depth and width of the slot structure 210 may 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, thereby improving the performance of the cavity filter jumper.

[0092] In some embodiments, combined 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 is understood that the first slot segment 211 and the second slot segment 212 are etched into the metal layer and extend in different directions. Thus, the mutually perpendicular arrangement of the first slot segment 211 and the second slot segment 212 forms an L-shaped structure in the metal layer. For example, the slot structure 210 is L-shaped, with one of the first slot segment 211 and the second slot segment 212 extending along the long side of the edge substrate integrated waveguide cavity 500 and the other extending along the short side.

[0094] During actual operation, the electromagnetic field distribution and transmission characteristics in the waveguide cavity can be flexibly controlled by adjusting the length, width and position of the first slot section 211 and the second slot section 212, 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 Figure 1 A coplanar waveguide structure 800 is provided at the portion where each microstrip feed line 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, help reduce reflection and loss of signals during transmission, and improve 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, which helps to improve the performance parameters of the cavity filter jumper such as bandwidth, out-of-band suppression and frequency response.

[0098] Optionally, the shape of the coplanar waveguide structure 800 may be designed to be rectangular or trapezoidal to adapt to the field distribution and impedance characteristics of the microstrip feed line 600 and the edge substrate integrated waveguide cavity 500 .

[0099] In addition, the second embodiment 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 herein incorporates the aforementioned cavity filter jumper. Through its zigzag energy transmission path 700 and centrally symmetrically distributed waveguide cavity structure, the cavity filter jumper achieves excellent filtering performance while also reducing planar dimensions and improving space utilization. This addresses the issue of excessive planar dimensions associated with conventional wide-stopband cavity filter jumpers, resulting in compactness, stability, and flexibility. Furthermore, the waveguide cavity structure constructed using the dielectric substrate 100 and the metal layer thereon, coupled with the ingenious microstrip feeder 600 layout, achieves efficient energy transmission, further broadening the stopband range, enhancing filtering effectiveness, and ensuring signal transmission stability within the cavity filter jumper.

[0101] Finally, it should be noted that those skilled in the art will readily identify other embodiments 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 that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A cavity filter jumper, characterized in that: include: A dielectric substrate (100) having a first surface (100a) and a second surface (100b) that are opposite to each other along a 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 constitute 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 cavity (500); 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); Microstrip line feeders (600) are respectively provided on two opposite sides along the first direction and on two opposite sides along the second direction of the first metal layer (200); 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 input port microstrip line feeder (610) and the output port microstrip line feeder (620) that are opposite to each other form an energy transmission path (700), and both energy transmission paths (700) are 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 in the edge substrate integrated waveguide cavity (500).

3. The cavity filter jumper according to claim 1, characterized in that: 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, characterized in that: The central substrate integrated waveguide cavity (400) is square, each of the edge substrate integrated waveguide cavities (500) is located at one corner 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 to 4, characterized in that: A plurality of metal vias (110) are provided on the dielectric substrate (100), and the first metal layer (200) and the second metal layer (300) are both 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 cavity (500).

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

7. The cavity filter jumper according to claim 6, characterized in that: The groove structure (210) is arranged adjacent to the metal via (110), and the groove structure (210) extends along at least one side edge of the corresponding edge substrate integrated waveguide cavity (500), avoiding the first connecting gap (511) or the second connecting gap (521).

8. The cavity filter jumper according to claim 7, characterized in that: The slot structure (210) comprises a first slot section (211) and a second slot section (212) which are perpendicular to each other.

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

10. A communication system, characterized in that: The invention comprises the cavity filter jumper according to any one of claims 1 to 9.

Images