Multi-channel SIW filtering jumper and communication device

Abstract

The invention provides a multichannel SIW filtering jumper and a communication device, and belongs to the technical field of filtering jumpers. The multichannel SIW filtering jumper comprises m * n SIW rectangular dual-mode resonant cavities which are arranged in m rows and n columns and work in a TE102 and TE201 orthogonal degenerate mode, m > 0, and n > 0; each row of SIW rectangular dual-mode resonant cavities corresponds to a horizontal channel, each column of SIW rectangular dual-mode resonant cavities corresponds to a vertical channel, two adjacent SIW rectangular dual-mode resonant cavities are coupled through a common wall, and a coupling window is located in a weakest electric field area of any one of the SIW rectangular dual-mode resonant cavities. According to the multichannel SIW filtering jumper, the number of channels and the working center frequency, the working bandwidth, the working order and the transmission zero point of each channel can be independently set.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of filter cross-connection, and particularly relates to a multi-channel SIW filter cross-connection and a communication device. BACKGROUND

[0002] Microwave cross-connection and filter are important devices in a wireless communication system. In order to simultaneously realize signal cross and filtering functions, a traditional method is to directly cascade the cross-connection and the filter, but the circuit size and insertion loss of this scheme are large. Therefore, people begin to try to directly integrate the filtering function in the microwave cross-connection, and then realize a new multifunctional device named filter cross-connection.

[0003] The substrate integrated waveguide (SIW) technology has obtained many applications in the microwave high frequency band due to its low loss, low cost, high power capacity and high integrity and other extremely attractive inherent characteristics. At present, the SIW filter cross-connection is to realize signal cross transmission and channel isolation by using orthogonal degenerate modes (TE 102 and TE 201 ) in the SIW square single-mode resonant cavity, and to construct the filtering function by taking the SIW square single-mode resonant cavity as a common cavity and other cavities surrounding the four sides.

[0004] Therefore, a multi-channel SIW filter cross-connection is needed, in which the number of channels can be freely designed according to requirements, and the working center frequency, working bandwidth, working order and transmission zero point of each channel can be independently designed. SUMMARY

[0005] The application aims to provide a multi-channel SIW filter cross-connection, in which the number of channels and the working center frequency, working bandwidth, working order and transmission zero point of each channel can be independently set.

[0006] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme: In the first aspect, the application provides a multi-channel SIW filter cross-connection, which comprises: m*n SIW rectangular dual-mode resonant cavities arranged in m rows and n columns and working in TE 102 and TE 201 orthogonal degenerate modes, m>0, n>0; Each row of SIW rectangular dual-mode resonant cavities corresponds to a horizontal channel, and each column of SIW rectangular dual-mode resonant cavities corresponds to a vertical channel, wherein, the adjacent two SIW rectangular dual-mode resonant cavities are coupled through a common wall, and the coupling window is located in the weakest electric field region of any SIW rectangular dual-mode resonant cavity.

[0007] Furthermore, the SIW rectangular dual-mode resonator at the source and / or load end of any horizontal or vertical channel is connected to a SIW rectangular single-mode resonator module in the channel direction. The SIW rectangular single-mode resonator module includes one or more SIW rectangular single-mode resonators for increasing the filtering order of the channel. The SIW rectangular single-mode resonator module located at the source end of the channel has an input port at its input end. The SIW rectangular single-mode resonator at its output end is coupled to the SIW rectangular dual-mode resonator through a common wall. The coupling window is located in the weakest electric field region of the SIW rectangular dual-mode resonator. The SIW rectangular single-mode resonant cavity module located at the channel load end has an output port at its output end. The SIW rectangular single-mode resonant cavity at its input end is coupled to the SIW rectangular dual-mode resonant cavity through a common wall, and the coupling window is located in the weakest electric field region of the SIW rectangular dual-mode resonant cavity.

[0008] Optionally, the SIW rectangular single-mode resonator module includes: multiple cascaded SIW rectangular single-mode resonators.

[0009] Optionally, the SIW rectangular single-mode resonator module includes: three SIW rectangular single-mode resonators coupled in a cascaded triplet structure.

[0010] Optionally, the SIW rectangular single-mode resonator module includes: four SIW rectangular single-mode resonators coupled in a cascaded quadtet structure.

[0011] Optionally, the input or output port of the SIW rectangular single-mode resonator is positioned at a distance relative to the center of the SIW rectangular single-mode resonator to add a transmission zero to its channel.

[0012] Optionally, a grounded coplanar waveguide resonator or a complementary split-ring resonator may be embedded on the surface of the SIW rectangular dual-mode resonator and / or the SIW rectangular single-mode resonator.

[0013] Furthermore, the input and output ports include: a 50-ohm microstrip line, a rectangular groove at the connection between the SIW rectangular dual-mode resonant cavity or the SIW rectangular single-mode resonant cavity and the microstrip line, the microstrip line connecting to the bottom of the corresponding groove and forming rectangular gaps with both sides of the groove, the size of the rectangular gap and the width of the coupling window being determined according to the filtering bandwidth of the channel.

[0014] Furthermore, the dimensions of the SIW rectangular dual-mode resonant cavity are determined based on the operating frequencies of its horizontal and vertical channels.

[0015] In a second aspect, the present invention provides a communication device comprising: a multi-channel SIW filter jumper.

[0016] The communication device provided by this invention also solves the problems raised in the background section.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The multi-channel filter jumper provided by this invention is used in TE mode. 102 and TE 201 Orthogonal degenerate SIW dual-mode rectangular cavities are coupled together to form the channel of the filter jumper, due to TE 102 Mode frequency is sensitive to cavity length, TE 201 The mode frequency is sensitive to the cavity width, allowing independent adjustment of the operating frequency of each channel. This solves the problem of frequency binding between channels in traditional square cavity filter jumpers. This design allows for independent control of the operating frequency and bandwidth of each channel. Through the structure of m×n SIW rectangular dual-mode resonant cavities arranged in m rows and n columns, the number of horizontal channels (m) and vertical channels (n) can be freely set according to actual needs, breaking the limitation of fixed channel numbers in traditional filter jumpers and adapting to multi-channel signal processing requirements in different scenarios. Simultaneously, TE... 102 and TE 201 The electric field distribution characteristics of orthogonal degenerate modes ensure efficient transmission of the target channel signal while minimizing crosstalk between channels, significantly improving the isolation performance between channels, and avoiding the degradation of transmission quality caused by mutual interference between signals from different channels.

[0018] 2. The multi-channel filter jumper provided by this invention connects a single-mode resonant cavity module to the outside of a dual-mode resonant cavity array. The addition of the single-mode resonant cavity module optimizes the impedance matching of the signal transmission path, reduces signal reflection at the port, and improves overall transmission stability. The single-mode resonant cavity module can be selected from cascaded single-mode resonant cavities, triplet structures, or quadtt structures according to the filtering accuracy requirements, coupling with each channel in a multi-mode coupling manner. Transmission zeros can be introduced on both sides of the channel as needed to improve the channel's frequency selectivity, allowing for flexible increases in the filtering order. It can effectively suppress out-of-band clutter and improve signal filtering performance as required. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of a four-channel filter jumper provided in an embodiment of the present invention; Figure 2 The electric field amplitude distribution diagram of the four-channel filter jumper provided in the embodiment of the present invention; Figure 3 The S-parameter simulation results of the four-channel filter jumper provided in the embodiments of the present invention; Figure 4 This is a schematic diagram of the structure of a three-channel filter jumper provided in an embodiment of the present invention; Figure 5 The electric field amplitude distribution diagram of the three-channel filter jumper provided in the embodiment of the present invention; Figure 6 The simulation results of the S-parameters of the three-channel filter jumper provided in the embodiment of the present invention. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0021] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0022] Example 1 This invention provides a multi-channel SIW filter jumper, such as... Figure 1 As shown, the multi-channel SIW filter jumper includes: m×n jumpers arranged in m rows and n columns, operating at TE... 102 and TE 201 Orthogonal degenerate SIW rectangular dual-mode resonators, m > 0, n > 0, form an m×n rectangular dual-mode resonator array. Each row of SIW rectangular dual-mode resonators corresponds to a horizontal channel, and each column of SIW rectangular dual-mode resonators corresponds to a vertical channel. Adjacent SIW rectangular dual-mode resonators are coupled through a common wall, and the coupling window is located in the weakest electric field region of any of the SIW rectangular dual-mode resonators. The size of the SIW rectangular dual-mode resonator is determined based on the operating frequencies of its horizontal and vertical channels. Since TE 102 The frequency of the mode is related to the length of the SIW rectangular cavity. l More sensitive, and TE 201 The operating frequency of the module is affected by the width of the SIW rectangular cavity. w The impact is more pronounced, thus allowing for relatively independent control of TE. 102 and TE 201 The operating frequency of the orthogonal degenerate mode is determined by the size of the SIW rectangular dual-mode resonator on each channel, thereby enabling independent control of the operating frequency of each channel.

[0023] The multi-channel SIW filter jumper provided in this invention, through the structure of m×n SIW rectangular dual-mode resonant cavities arranged in m rows and n columns, allows for the free setting of the number of horizontal channels m and vertical channels n according to actual needs, breaking the limitation of the fixed number of channels in traditional filter jumpers and adapting to the multi-channel signal processing requirements in different scenarios. Simultaneously, it utilizes TE... 102 and TE 201 The electric field distribution characteristics of orthogonal degenerate modes ensure efficient transmission of the target channel signal while minimizing crosstalk between channels, significantly improving the isolation performance between channels, and avoiding the degradation of transmission quality caused by mutual interference between signals from different channels.

[0024] The number of channels required for the multi-channel SIW filter jumper provided in this embodiment of the invention can be determined according to specific needs. For example, if there are m=2 channels in the horizontal direction and n=2 channels in the vertical direction, there are a total of 4 independent channels. Since each SIW rectangular dual-mode resonant cavity can construct the TE of the channel relatively independently... 102 and TE 201 Orthogonal degenerate modes enable flexible control of the operating frequency of each channel, with a maximum achievable frequency ratio of 1.32 between channels. In this embodiment, the mutual coupling windows of adjacent SIW rectangular dual-mode resonators are placed in the TE... 102 or TE 201 The weakest electric field region of the orthogonal degenerate mode is located at the midpoint of the sidewall of the rectangular two-mode resonator, corresponding to the center of the rectangular two-mode resonator, thereby achieving good transmission and isolation performance between each channel.

[0025] Furthermore, the SIW rectangular dual-mode resonator at the source and / or load end of any channel is connected to a SIW rectangular single-mode resonator module in the channel direction. The SIW rectangular single-mode resonator module includes one or more SIW rectangular single-mode resonators used to increase the filtering order of the channel. That is, for any channel, a SIW rectangular single-mode resonator module can be connected to the source end in the channel direction, or to the load end in the channel direction, or both the source and load ends can be connected to a SIW rectangular single-mode resonator module.

[0026] For the SIW rectangular single-mode resonant cavity module located at the source end of the channel, the SIW rectangular single-mode resonant cavity at its input end is provided with an input port, and the SIW rectangular single-mode resonant cavity at its output end is coupled to the SIW rectangular dual-mode resonant cavity through a common wall. The coupling window is located in the weakest electric field region of the SIW rectangular dual-mode resonant cavity.

[0027] The SIW rectangular single-mode resonant cavity module located at the channel load end has an output port at its output end. The SIW rectangular single-mode resonant cavity at its input end is coupled to the SIW rectangular dual-mode resonant cavity through a common wall, and the coupling window is located in the weakest electric field region of the SIW rectangular dual-mode resonant cavity.

[0028] In this embodiment of the invention, the SIW rectangular single-mode resonant cavity module not only increases the filtering order of the channel, but also introduces transmission zeros in the upper or lower sideband of each channel as needed.

[0029] For example, the SIW rectangular single-mode resonator module includes: a resonator operating in fundamental mode TE. 101 The SIW rectangular single-mode resonator has an input or output port that is offset from the center of the SIW rectangular single-mode resonator. This allows it to be directly coupled to the source or load of the channel in a multi-mode coupling manner, and a transmission zero can be introduced into the upper sideband of the channel.

[0030] For example, a SIW rectangular single-mode resonator module includes multiple cascaded SIW rectangular single-mode resonators. Taking two cascaded SIW rectangular single-mode resonators as an example, the two cascaded resonators operate in the fundamental mode TE. 101 The SIW rectangular single-mode resonant cavity is coupled to the source or load of the same channel, which can introduce two transmission zeros in the upper sideband of the channel. Using two cascaded resonators operating at TE... 102 The higher-order mode SIW rectangular single-mode resonant cavity is coupled with the source and load of the channel, which can introduce a transmission zero in both the upper and lower sidebands of the channel.

[0031] For example, the SIW rectangular single-mode resonator module includes three SIW rectangular single-mode resonators coupled in a cascaded triplet structure (CT). By directly cascading them with the source or load of the channel, a transmission zero can be introduced in the upper or lower sideband of the passband as needed.

[0032] For example, the SIW rectangular single-mode resonator module includes four SIW rectangular single-mode resonators coupled in a cascaded quadtet (CQ) structure. By directly cascading them with the source or load of the channel, a transmission zero can be introduced in both the upper and lower sidebands of the passband.

[0033] Furthermore, the surfaces of the SIW rectangular single-mode resonator and the SIW rectangular dual-mode resonator are embedded with resonant units such as grounded coplanar waveguide (GCPW) resonators, complementary split-ring resonators (CSRR) or cascaded SIW resonators, depending on the requirements of the channel. This invention optimizes impedance matching of the signal transmission path by incorporating a single-mode resonant cavity module, reducing signal reflection at the port and improving overall transmission stability. The single-mode resonant cavity module can be selected from cascaded single-mode resonants, triplet structures, or quadtt structures according to filtering accuracy requirements, coupling with each channel in a multimode coupling manner. Transmission zeros can be introduced on both sides of the channel as needed to improve the channel's frequency selectivity, allowing for flexible increases in the filtering order. It can effectively suppress out-of-band clutter and improve signal filtering performance as required.

[0034] This invention employs a TE-based operating system. 102 and TE 201 Orthogonal degenerate SIW dual-mode rectangular cavities are coupled together to form the channel of the filter jumper, due to TE 102 The frequency of the mode is related to the length of the SIW rectangular cavity. l More sensitive, and TE 201 The operating frequency of the module is affected by the width of the SIW rectangular cavity. w The impact is more pronounced, thus allowing for relatively independent control of TE. 102 and TE 201 The orthogonal degenerate mode operating frequency allows for independent control of the operating frequency of each channel. Furthermore, using a SIW rectangular single-mode cavity operating in the fundamental or higher-order modes for multimode coupling with each channel allows for the introduction of transmission zeros on both sides of the channel as needed to improve the channel's frequency selectivity.

[0035] In a specific embodiment provided in Embodiment 1 of the present invention, such as Figure 1 As shown, the filter jumper provided by this invention consists of a dielectric substrate and two metal layers. The dielectric substrate is a microwave board with a dielectric constant of 2.2 and a thickness of 0.508 mm. In this embodiment, there are m=2 channels in the horizontal direction and n=2 channels in the vertical direction, for a total of 4 channels with the same operating bandwidth but different operating frequencies. The filter jumper includes: a channel located at the center operating at TE... 102 and TE 201 Four orthogonal degenerate SIW rectangular dual-mode resonators (9-12), and directly coupled to these dual-mode resonators and operating at TE. 101 SIW rectangular single-mode resonant cavity (13-20), wherein, in this embodiment, SIW rectangular single-mode resonant cavity (14-20) is preferably a square single-mode resonant cavity.

[0036] Specifically, the right side of the SIW rectangular dual-mode resonant cavity 9 is coupled to the SIW rectangular dual-mode resonant cavity 10, the lower side of the SIW rectangular dual-mode resonant cavity 9 is coupled to the SIW rectangular dual-mode resonant cavity 12, the lower side of the SIW rectangular dual-mode resonant cavity 10 is coupled to the SIW rectangular dual-mode resonant cavity 11, and the right side of the SIW rectangular dual-mode resonant cavity 12 and the left side of the SIW rectangular dual-mode resonant cavity 11 are coupled.

[0037] The upper side of the SIW rectangular dual-mode resonant cavity 9 is coupled to the SIW rectangular single-mode resonant cavity 13, and the lower side of the SIW rectangular dual-mode resonant cavity 12 is coupled to the SIW square single-mode resonant cavity 18. The upper side of the SIW rectangular single-mode resonant cavity 13 is connected to the first input port 1, and the lower side of the SIW square single-mode resonant cavity 18 is connected to the first output port 6. The first input port 1, the SIW rectangular single-mode resonant cavity 13, the SIW rectangular dual-mode resonant cavity 9, the SIW rectangular dual-mode resonant cavity 12, the SIW square single-mode resonant cavity 18, and the first output port 6 constitute the first unit structure, thereby forming the first channel corresponding to the first passband: the signal is input from the first input port 1, enters the SIW rectangular single-mode resonant cavity 13, then enters the SIW rectangular dual-mode resonant cavity 9, then enters the SIW rectangular dual-mode resonant cavity 12 and the SIW square single-mode resonant cavity 18, and finally outputs from the first output port 6.

[0038] The coupling window between the SIW rectangular single-mode resonator 13 and the SIW rectangular dual-mode resonator 9 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 9. The coupling window between the SIW rectangular dual-mode resonator 9 and the SIW rectangular dual-mode resonator 12 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 9. The coupling window between the SIW rectangular dual-mode resonator 12 and the SIW square single-mode resonator 18 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 12.

[0039] The first input port 1 has an offset distance relative to the center of the SIW rectangular single-mode resonant cavity 13. w TP1 is used to satisfy the conditions for multimodal coupling. It can generate a transmission zero in the upper sideband of the first passband, and the position of the transmission zero can be controlled by the size of the offset distance.

[0040] By adjusting the length of the SIW rectangular single-mode resonant cavity 13 l 13 and width w 13. Width of SIW rectangular dual-mode resonant cavity 9 w 9. Width of SIW rectangular dual-mode resonant cavity 12 w 12. The length of the SIW square single-mode resonator is 18. l 18. The center frequency of the first passband of the filter jumper can be controlled. This is achieved by adjusting the width of the coupling window of the SIW rectangular single-mode resonator 13 and the SIW rectangular dual-mode resonator 9. wc1. Width of the coupling window of SIW rectangular dual-mode resonator 12 and SIW rectangular dual-mode resonator 9 wc The width of the coupling window of SIW square single-mode resonator 11 and SIW rectangular dual-mode resonator 12 wc 12 can control the bandwidth of the first passband of the filter jumper.

[0041] The upper side of the SIW rectangular dual-mode resonant cavity 10 is coupled to the SIW square single-mode resonant cavity 14, and the lower side of the SIW rectangular dual-mode resonant cavity 11 is coupled to the SIW square single-mode resonant cavity 17. The upper side of the SIW square single-mode resonant cavity 14 is connected to the second input port 2, and the lower side of the SIW square single-mode resonant cavity 17 is connected to the second output port 5. The second input port 2, the SIW square single-mode resonant cavity 14, the SIW rectangular dual-mode resonant cavity 10, the SIW rectangular dual-mode resonant cavity 11, the SIW square single-mode resonant cavity 17, and the second output port 5 constitute the second unit structure, thereby forming a second channel corresponding to the second passband: the signal is input from the second input port 2, enters the SIW square single-mode resonant cavity 14, then enters the SIW rectangular dual-mode resonant cavity 10, then enters the SIW rectangular dual-mode resonant cavity 11 and the SIW square single-mode resonant cavity 17, and finally outputs from the second output port 5.

[0042] The coupling window between the SIW square single-mode resonator 14 and the SIW rectangular dual-mode resonator 10 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 10. The coupling window between the SIW rectangular dual-mode resonator 10 and the SIW rectangular dual-mode resonator 11 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 10. The coupling window between the SIW rectangular dual-mode resonator 11 and the SIW square single-mode resonator 17 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 11.

[0043] By adjusting the length of the SIW square single-mode resonant cavity 14 l 14. Width of SIW rectangular dual-mode resonant cavity 10 w 10. Width of SIW rectangular dual-mode resonant cavity 11 w 11. The length of SIW square single-mode resonant cavity 17 l 17. The center frequency of the second passband of the filter jumper can be controlled. This is achieved by adjusting the width of the coupling window between the SIW square single-mode resonator 14 and the SIW rectangular dual-mode resonator 10. wc 2. Width of the coupling window of SIW rectangular dual-mode resonator 10 and SIW rectangular dual-mode resonator 11 wc The width of the coupling window of SIW square single-mode resonator 17 and SIW rectangular dual-mode resonator 11 wc 22 can control the bandwidth of the second passband of the filter jumper.

[0044] The right side of the SIW rectangular dual-mode resonator 10 is coupled to the SIW square single-mode resonator 15, and the left side of the SIW rectangular dual-mode resonator 9 is coupled to the SIW square single-mode resonator 20. The right side of the SIW square single-mode resonator 15 is connected to the third input port 3, and the left side of the SIW square single-mode resonator 20 is connected to the third output port 8. The third input port 3, the SIW square single-mode resonator 15, the SIW rectangular dual-mode resonator 10, the SIW rectangular dual-mode resonator 9, the SIW square single-mode resonator 20, and the third output port 8 constitute the third unit structure, thereby forming the third channel corresponding to the third passband: the signal is input through the third input port 3, enters the SIW square single-mode resonator 15, then enters the SIW rectangular dual-mode resonator 10, then enters the SIW rectangular dual-mode resonator 9 and the SIW square single-mode resonator 20, and finally outputs from the third output port 8.

[0045] The coupling window between the SIW square single-mode resonator 15 and the SIW rectangular dual-mode resonator 10 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 10. The coupling window between the SIW rectangular dual-mode resonator 10 and the SIW rectangular dual-mode resonator 9 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 9. The coupling window between the SIW rectangular dual-mode resonator 9 and the SIW square single-mode resonator 20 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 9.

[0046] By adjusting the length of the SIW square single-mode resonant cavity 15 l 15. The length of the SIW rectangular dual-mode resonant cavity 10 l 10. The length of the SIW rectangular dual-mode resonant cavity 9 l 9. The length of the SIW square single-mode resonant cavity 20 l 20 allows control over the center frequency of the third passband of the filter jumper. This is achieved by adjusting the width of the coupling window between the SIW square single-mode resonator 15 and the SIW rectangular dual-mode resonator 10. wc 3. Width of the coupling window of SIW rectangular dual-mode resonator 10 and SIW rectangular dual-mode resonator 9 wc The width of the coupling window of SIW square single-mode resonator 20 and SIW rectangular dual-mode resonator 9. wc 32 can control the bandwidth of the third passband of the filter jumper.

[0047] The right side of the SIW rectangular dual-mode resonant cavity 11 is coupled to the SIW square single-mode resonant cavity 16, and the left side of the SIW rectangular dual-mode resonant cavity 12 is coupled to the SIW square single-mode resonant cavity 19. The right side of the SIW square single-mode resonant cavity 16 is connected to the fourth input port 4, and the left side of the SIW square single-mode resonant cavity 19 is connected to the fourth output port 7. The fourth input port 4, the SIW square single-mode resonant cavity 16, the SIW rectangular dual-mode resonant cavity 11, the SIW rectangular dual-mode resonant cavity 12, the SIW square single-mode resonant cavity 19, and the fourth output port 7 constitute the fourth unit structure, thereby forming the fourth channel corresponding to the fourth passband: the signal is input from the fourth input port 4, enters the SIW square single-mode resonant cavity 16, then enters the SIW rectangular dual-mode resonant cavity 11, then enters the SIW rectangular dual-mode resonant cavity 12 and the SIW square single-mode resonant cavity 19, and finally outputs from the second output port 7.

[0048] The coupling window between the SIW square single-mode resonator 14 and the SIW rectangular dual-mode resonator 10 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 10. The coupling window between the SIW rectangular dual-mode resonator 10 and the SIW rectangular dual-mode resonator 11 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 10. The coupling window between the SIW rectangular dual-mode resonator 11 and the SIW square single-mode resonator 17 is located on their adjacent sides and at the center of the SIW rectangular dual-mode resonator 11.

[0049] By adjusting the length of the SIW square single-mode resonant cavity 16 l 16. The length of the SIW rectangular dual-mode resonant cavity 11 l 11. The length of the SIW rectangular dual-mode resonant cavity 12 l 12. The length of the SIW square single-mode resonant cavity 19 l 19. The center frequency of the fourth passband of the filter jumper can be controlled. This is achieved by adjusting the width of the coupling window between the SIW square single-mode resonator 16 and the SIW rectangular dual-mode resonator 11. wc 4. Width of the coupling window of SIW rectangular dual-mode resonator 11 and SIW rectangular dual-mode resonator 12 wc The width of the coupling window of SIW square single-mode resonator 19 and SIW rectangular dual-mode resonator 12. wc 42 can control the bandwidth of the fourth passband of the filter jumper.

[0050] In this embodiment, the first input port 1, the second input port 2, the third input port 3, the fourth input port 4, the first output port 6, the second output port 5, the third output port 8, and the fourth output port 7 are all fed by 50-ohm microstrip lines. A rectangular groove is provided at the connection point between the SIW rectangular single-mode resonant cavity and the microstrip line. The microstrip line connects to the bottom of the corresponding groove, forming rectangular gaps on both sides of the groove, used to control external coupling. The size of the rectangular gaps and the width of the coupling window are determined according to the filtering bandwidth of the channel.

[0051] More specifically, in this embodiment, the dimensions of each part are as follows: w 9 = 9.07 l 9 = 7.07 w 10 = 6.75 l 10 = 7.56 w 11 = 6.61, l 11 = 8.43 w 12 = 8.83 l 12 = 7.73, w 13 = 4.55 l 13 = 7.47 l 14 = 4.3 l 15 = 4.58 l 16 = 5.01 l 17 = 4.27 l 18 = 5.4 l 19 = 4.98 l 20 = 4.58 wc 1 = 3.02, wc 11 = 2.66, wc 12 = 2.69 wc 2 = 2.24, wc 21 = 2.15, wc 22 = 2.26 wc 3 = 2.28 wc 31 = 2.32, wc 32 = 2.3 wc 4 = 2.48 wc 41 = 2.52, wc 42 = 2.51, w tp1 = 1.52.

[0052] like Figure 2The electric field diagram of the four-channel filter jumper provided in this embodiment is shown. Taking the first channel as an example, when the signal enters from the first input port (1), it excites TE in the SIW rectangular single-mode resonant cavity (13). 101 The mode is transmitted and excited in the SIW rectangular two-mode resonator (9) through adjacent coupling windows. 201 The mode is then transmitted through adjacent coupling windows and excited in the SIW rectangular dual-mode resonator (12) TE. 201 The mode is then transmitted through adjacent coupling windows and excites the TE in the SIW square single-mode resonator (18). 101 The mode is finally output from the first output port (6). Since the coupling window of the dual-mode resonator with the adjacent channel is located in the weakest electric field region, there is no energy output in the adjacent channel. The same applies to the second, third and fourth channels.

[0053] like Figure 3 The S-parameter simulation results of the four-channel filter jumper provided in this embodiment are shown. The four channels have the same operating bandwidth but different operating frequencies. The operating frequency of the first channel is 25.9 GHz, the second channel is 32.6 GHz, the third channel is 30.5 GHz, and the fourth channel is 28.1 GHz. The 3-dB operating bandwidth of all four channels is 4.7%. Within the four passbands, the return loss is less than -20 dB, the insertion loss is better than -2.13 dB, and the in-band isolation between the four channels is better than -20 dB. The first channel has a transmission zero.

[0054] The four-channel filter jumper provided in the above embodiments of the present invention utilizes the TE of the SIW single-mode resonant cavity. 101 TE of mode and dual-mode resonator 102 and TE 201 Orthogonal degenerate modes are used to construct the four passbands of the filter jumper. The length of the rectangular slit is adjusted... ls and width ws The external quality factor of the filter crossover junction can be controlled. By adjusting the width of each coupling window, the coupling coefficient of the filter jumper can be controlled. Based on the required filtering bandwidth, by setting the external quality factor and coupling coefficient that satisfy the coupling matrix theory, the jumper can have bandpass filtering characteristics in each passband, providing great flexibility in design.

[0055] Example 2 Based on the same inventive concept as the above embodiments, the present invention also provides a three-channel SIW filter jumper, such as... Figure 4 As shown, there are m=1 channels horizontally and n=2 channels vertically, for a total of 3 channels. This SIW filter jumper includes: a centrally located jumper operating at TE... 102 and TE201 Two orthogonally degenerate SIW rectangular dual-mode resonators (R3 and R4), and two resonators directly coupled to these dual-mode resonators and operating at TE. 101 The SIW rectangular single-mode resonators (R1, R2, R5, R6, R7, and R8) differ from the scheme in Example 1 in that all SIW single-mode resonators are replaced with rectangular resonators instead of square resonators, thereby introducing a transmission zero on each side of the passband of the channel.

[0056] The SIW rectangular dual-mode resonator R3 is coupled to SIW rectangular dual-mode resonator R4 on its right side. SIW rectangular single-mode resonators R5 and R8 are coupled to the top and bottom sides of SIW rectangular dual-mode resonator R3, respectively. SIW rectangular single-mode resonators R6 and R7 are coupled to the top and bottom sides of SIW rectangular dual-mode resonator R4, respectively. SIW rectangular single-mode resonator modules, namely the cascaded SIW square single-mode resonator R2 and SIW rectangular single-mode resonator R1, are coupled to the left side of SIW rectangular dual-mode resonator R3. Each SIW rectangular single-mode resonator (R1, R5, R6, R7, and R8) has input or output ports (P1, P2, P3, P5, and P6), each with a bias distance. The output ports (P5 and P6) of the vertical channel are offset relative to the input ports (P2 and P3). The input port P1 of the horizontal channel has a bias distance, and the output port P4 is located at the load end of SIW rectangular dual-mode resonator R4.

[0057] More specifically, in this embodiment, the dimensions of each part are as follows: w 1 = 7.47 l 1 = 4.45 w 2 = 5.3, l 2 = 5.54 w 3 = 8.61 l 3 = 8.53 w 4 = 8.67 l 4 = 8.51 w 5 = 6.26 l 5 = 10.17 w 6 = 6.26 l 6 = 10.08 w 7 = 6.22 l 7 = 10.17 w 8 = 6.24 l 8 = 10.08 w c12 = 2.74, w c23 = 2.54, w c34 = 2.78,w c35 = 2.6, w c46 = 2.4, w c47 = 2.46, w c38 = 2.56, w t1 = 2.37, w t2 = 3.2, w t3 = 2.79, w t4 = 2.82, w t5 = 2.82, w tp1 = 1.99, w tp2 = 2.64, w tp3 = 1.97, w tp4 = 2.62, w tp5 = 2.04, w s1 = w s2 = w s3 = w s4 = w s5 = w s6 = 0.3, l s1 = 1.05, l s2 = 1.20, l s3 = 1.00, l s4 = 1.20, l s5 = 1, l s6 = 1.2, wp = 0.76, d = 0.4, p = 0.8.

[0058] like Figure 5 The figure shown is an electric field amplitude distribution diagram of the three-channel filter jumper provided in this embodiment. Figure 6The S-parameter simulation results of the three-channel filter jumper provided in this embodiment are shown. It can be seen that introducing transmission zeros 3 and 4 in vertical channel 26 (input port P2 to output port P6) results in a relative bandwidth of 2.5%. In vertical channel 35 (input port P3 to output port P5), introducing transmission zeros 1 and 2 results in a relative bandwidth of 2%. In horizontal channel 14 (input port P1 to output port P4), introducing transmission zero 5 results in a relative bandwidth of 5%. The operating frequency of all three channels is 25.9 GHz.

[0059] Example 3 This embodiment also provides a communication device, which includes the multi-channel SIW filter jumper provided in Embodiments 1 and 2 of the present invention. This communication device is designed with a multi-channel SIW filter jumper, allowing independent adjustment of the operating frequency of each channel. This solves the problem of frequency binding between channels in traditional square cavity filter jumpers. This design allows for independent control of the operating frequency and bandwidth of each channel, adapting to the multi-channel signal processing needs in different scenarios. Simultaneously, it utilizes TE... 102 and TE 201 The electric field distribution characteristics of orthogonal degenerate modes ensure efficient transmission of the target channel signal while minimizing crosstalk between channels, significantly improving the isolation performance between channels, and avoiding the degradation of transmission quality caused by mutual interference between signals from different channels.

[0060] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A multi-channel SIW filter jumper, characterized in that, include: m×n machines arranged in m rows and n columns, working at TE 102 and TE 201 Orthogonally degenerate SIW rectangular dual-mode resonant cavity, m > 0, n > 0; Each row of SIW rectangular dual-mode resonators corresponds to a horizontal channel, and each column of SIW rectangular dual-mode resonators corresponds to a vertical channel. Adjacent SIW rectangular dual-mode resonators are coupled through a common wall, and the coupling window is located in the weakest electric field region of any of the SIW rectangular dual-mode resonators.

2. The multi-channel SIW filter jumper according to claim 1, characterized in that, The SIW rectangular dual-mode resonator at the source and / or load end of any of the horizontal or vertical channels is connected to a SIW rectangular single-mode resonator module in the channel direction. The SIW rectangular single-mode resonator module includes one or more SIW rectangular single-mode resonators for adding a filtering order to the channel. The SIW rectangular single-mode resonator module located at the source end of the channel has an input port at its input end, and its output end is coupled to the SIW rectangular dual-mode resonator via a common wall. The coupling window is located in the weakest electric field region of the SIW rectangular dual-mode resonator. The SIW rectangular single-mode resonant cavity module located at the load end of the channel has an output port at its output end, and its input end SIW rectangular single-mode resonant cavity is coupled to the SIW rectangular dual-mode resonant cavity through a common wall. The coupling window is located in the weakest electric field region of the SIW rectangular dual-mode resonant cavity.

3. The multi-channel SIW filter jumper according to claim 2, characterized in that, The SIW rectangular single-mode resonant cavity module includes multiple cascaded SIW rectangular single-mode resonant cavities.

4. The multi-channel SIW filter jumper according to claim 2, characterized in that, The SIW rectangular single-mode resonant cavity module includes three SIW rectangular single-mode resonant cavities coupled in a cascaded triplet structure.

5. The multi-channel SIW filter jumper according to claim 2, characterized in that, The SIW rectangular single-mode resonant cavity module includes four SIW rectangular single-mode resonant cavities coupled in a cascaded quadtet structure.

6. The multi-channel SIW filter jumper according to claim 2, characterized in that, The input or output port of the SIW rectangular single-mode resonant cavity is positioned at a distance relative to the center of the SIW rectangular single-mode resonant cavity, which is used to add a transmission zero point to its channel.

7. The multi-channel SIW filter jumper according to claim 2, characterized in that, The SIW rectangular dual-mode resonant cavity and / or the SIW rectangular single-mode resonant cavity have a grounded coplanar waveguide resonant cavity or a complementary split-ring resonant cavity embedded in their surfaces.

8. The multi-channel SIW filter jumper according to claim 2, characterized in that, The input port and the output port include: a 50-ohm microstrip line; a rectangular groove is provided at the connection between the SIW rectangular dual-mode resonant cavity or the SIW rectangular single-mode resonant cavity and the microstrip line; the microstrip line is connected to the bottom of the corresponding groove and forms a rectangular gap with both sides of the groove; the size of the rectangular gap and the width of the coupling window are determined according to the filtering bandwidth of the channel.

9. The multi-channel SIW filter jumper according to claim 2, characterized in that, The dimensions of the SIW rectangular dual-mode resonant cavity are determined based on the operating frequencies of its horizontal and vertical channels.

10. A communication device, characterized in that, include: The multi-channel SIW filter jumper as described in any one of claims 1 to 9.

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