Multi-system access platform

Abstract

The application relates to a multi-system access platform, which comprises a shell, a low-pass filter, a first band-pass filter, a second band-pass filter, a first signal joint, a second signal joint and a common joint. The first signal joint is connected with a first frequency band signal, the second signal joint is connected with a second frequency band signal, and the first frequency band is higher than the second frequency band. One end of the first band-pass filter is connected with the first signal joint, one end of the second band-pass filter is connected with the second signal joint, and the other end of the second band-pass filter is connected with one end of the low-pass filter. The other end of the low-pass filter is connected with the common joint after being combined with the other end of the first band-pass filter. The multi-system access platform can filter out the parasitic harmonic peak generated by the second band-pass filter, avoid the stray and blocking interference caused by the parasitic harmonic peak to the first frequency band signal, improve the isolation between the first frequency band signal and the second frequency band signal, expand the bandwidth, and improve the product performance.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, and in particular to a multi-system access platform. Background Technology

[0002] With the development of mobile communication technology, point-of-interface (POI) platforms have been widely used. POIs primarily aim to achieve the combining and efficient transmission of signals from multiple operators, systems, and standards. With the continuous growth in the number of 5G users and the increasing demands for network speed and positioning accuracy, the need for mobile network expansion has become increasingly urgent.

[0003] Mainstream multi-system access platform products in related technologies can achieve the splitting and combining of mobile signals that do not include the 3800MHz frequency band higher than the BeiDou band. Although the operating frequency band of the common port of the multi-system access platform given in patent CN116014392A reaches 4200MHz, it still cannot meet the access requirements of the 4800MHz-4960MHz frequency band for the expansion of mobile 5G networks.

[0004] To enable wider frequency band signal access, improvements are needed to the common port multi-system access platform technology and the split-and-combine scheme in related technologies. Summary of the Invention

[0005] Therefore, it is necessary to provide a multi-system access platform that can improve isolation, suppress parasitic spikes, thereby increasing bandwidth and improving product performance, in order to solve at least one of the problems in the relevant technologies.

[0006] This application provides a multi-system access platform, including a housing. The housing is provided with a low-pass filter, a first band-pass filter, a second band-pass filter, a first signal connector, a second signal connector, and a common connector. The first signal connector is used to access a first frequency band signal, and the second signal connector is used to access a second frequency band signal. The first frequency band is higher than the second frequency band. The first band-pass filter is disposed between the first signal connector and the common connector. The low-pass filter and the second band-pass filter are disposed between the second signal connector and the common connector. One end of the first band-pass filter is connected to the first signal connector, one end of the second band-pass filter is connected to the second signal connector, and the other end of the second band-pass filter is connected to one end of the low-pass filter. The other end of the low-pass filter and the other end of the first band-pass filter are combined and then connected to the common connector.

[0007] In one embodiment, the low-pass filter is a high-low impedance air-suspended stripline structure.

[0008] In one embodiment, the high and low impedance air-suspended strip structure includes a filter stub disposed within the housing; a support platform is provided within the housing, the filter stub is mounted on the support platform, and an insulating element is provided between the filter stub and the support platform, the insulating element making the filter stub and the support platform mutually insulated and isolated.

[0009] In one embodiment, the multi-system access platform further includes a first tuning element, which is tunably disposed on the side wall of the housing and extends into the housing to tune the low-pass filter from the side.

[0010] In one embodiment, there are multiple first tuning elements, which are arranged at intervals along the length of the filter stub.

[0011] In one embodiment, a tap bar is inserted into the common connector, and one end of the filter stub is connected to the tap bar; the first bandpass filter includes a plurality of first resonant pillars arranged sequentially at intervals within the housing, and the side wall of the first resonant pillar closest to the tap bar is provided with a coupling groove, and the tap bar is at least partially disposed in the coupling groove and coupled to the first resonant pillar.

[0012] In one embodiment, the cross-sectional profile of the coupling groove along its extension direction is arc-shaped.

[0013] In one embodiment, the second signal connector includes a first distribution signal connector and a second distribution signal connector. The first distribution signal connector is used to access a first distribution frequency band signal, and the second distribution signal connector is used to access a second distribution frequency band signal. The second bandpass filter includes a first filter and a second filter. One end of the first filter is connected to the first distribution signal connector, one end of the second filter is connected to the second distribution signal connector, and the other end of the first filter and the other end of the second filter are combined and then connected to the low-pass filter.

[0014] In one embodiment, the first filter includes a plurality of second resonant pillars arranged sequentially at intervals within the housing; the second filter includes a plurality of third resonant pillars arranged sequentially at intervals within the housing; the multi-system access platform further includes a coupling rod and a conductive element, the coupling rod penetrating the partition wall between the low-pass filter and the second band-pass filter, and the coupling rod is provided with a first supporting medium disposed in the partition wall; one end of the coupling rod is connected to the end of the filter branch of the low-pass filter away from the common connector, and the other end of the coupling rod passes through and is coupled to one of the third resonant pillars closest to the low-pass filter; one of the second resonant pillars closest to the coupling rod is connected to the coupling rod through the conductive element.

[0015] In one embodiment, the housing includes a first layer and a second layer stacked along the thickness direction, with a partition between the first layer and the second layer; the second filter includes two third filters, which are combined and connected to the low-pass filter, with one third filter disposed in the first layer and the other third filter disposed in the second layer.

[0016] In one embodiment, one of the third filters further includes a plurality of fourth resonant pillars disposed sequentially at intervals in the first layer; another third filter includes a plurality of fifth resonant pillars disposed sequentially at intervals in the second layer and a sixth resonant pillar disposed in the first layer, the sixth resonant pillar and one of the fifth resonant pillars being arranged along the thickness direction of the partition, the partition having a coupling window, the sixth resonant pillar being connected to one of the fifth resonant pillars through the coupling window; the sixth resonant pillar is also connected to one of the fourth resonant pillars.

[0017] In one embodiment, another of the third filters further includes a second tuning element; an adjustment hole is provided between the sixth resonant post and one of the fifth resonant posts, and the second tuning element is adjustablely disposed in the housing, extending into the adjustment hole.

[0018] In one embodiment, another of the third filters further includes a third tuning element; the third tuning element is tunably disposed in the housing, and the third tuning element is arranged opposite to the sidewall of the sixth resonant post or opposite to the sidewall of the fifth resonant post corresponding to the sixth resonant post.

[0019] In one embodiment, the first frequency band includes 380MHz-2700MHz; the second frequency band includes 3300MHz-6000MHz; the first allocated frequency band includes 698MHz-1270MHz; and the second allocated frequency band includes 1410MHz-2700MHz.

[0020] The aforementioned multi-system access platform uses a low-pass filter to remove parasitic harmonic peaks generated by the second band-pass filter, avoiding spurious interference and blocking interference caused by parasitic harmonic peaks to the first frequency band signal. This improves the isolation between the first and second frequency band signals, thereby expanding the bandwidth and enhancing product performance. Attached Figure Description

[0021] Figure 1 This is a simplified diagram of a multi-system access platform according to an embodiment of this application.

[0022] Figure 2 This is a simplified diagram of a multi-system access platform according to another embodiment of this application.

[0023] Figure 3 This is a simplified diagram of a multi-system access platform according to another embodiment of this application.

[0024] Figure 4 This is a structural diagram of a multi-system access platform according to an embodiment of this application.

[0025] Figure 5 for Figure 4 Enlarged structural diagram at point A.

[0026] Figure 6 for Figure 4 The diagram shows the structure of the multi-system access platform at the merging node a.

[0027] Figure 7 for Figure 4 The diagram shows the structure of the multi-system access platform at the merging node b.

[0028] Figure 8 This is a structural diagram of a multi-system access platform according to another embodiment of this application.

[0029] Figure 9 for Figure 8 The side view of the multi-system access platform shown.

[0030] Figure 10 for Figure 8 The image shows a bottom view of the multi-system access platform.

[0031] Figure 11 for Figure 8 Enlarged structural diagram at point B.

[0032] Figure 12 for Figure 11 Cross-sectional view of the structure at point CC.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Housing; 101. First channel; 1011. Support platform; 102. Second channel; 103. Third channel; 104. Fourth channel; 11. Low-pass filter; 111. Filter stub; 1111. Filter unit; 11111. First conductive sheet; 11112. Second conductive sheet; 112. Insulating component; 113. Insulating fastener; 114. First tuning component; 12. First bandpass filter; 121. Fifth filter; 122. First resonant post; 1221. Coupling groove; 13. Second bandpass filter; 1301. First filter; 1302. Second filter; 131. Third filter; 13 11. Fourth resonant pillar; 1312. Fifth resonant pillar; 1313. Sixth resonant pillar; 1314. Second tuner; 1315. Adjustment hole; 1316. Third support medium; 1317. Mounting hole; 132. Fourth filter; 133. Second resonant pillar; 134. Third resonant pillar; 14. Partition wall; 15. Partition plate; 151. Coupling window; 20. Common connector; 21. Tap bar; 30. Signal connector; 31. First signal connector; 32. Second signal connector; 321. First distribution signal connector; 322. Second distribution signal connector; 40. Coupling rod; 41. First support medium; 50. Conductive component. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] As described in the background section, the multi-system access platform in related technologies cannot meet the access requirements of mobile 5G network expansion in the 4800MHz-4960MHz frequency band. This problem arises because, during the combining of high and low frequency signals, the second harmonic of the resonant pillar in the low-frequency channel, along with the inherent resonance of the flybar and coupling rod, inevitably generate parasitic harmonic peaks in the high-frequency channels above 4GHz. These parasitic harmonic peaks worsen the isolation between the low-frequency and high-frequency channels, leading to spurious interference and congestion interference between access networks.

[0037] For the reasons mentioned above, this application provides a multi-system access platform that can improve isolation, suppress parasitic peaks, thereby increasing bandwidth and improving product performance.

[0038] Please see Figures 1 to 3 To make the solution of this application clearer, this application defines a frequency band range, for example, including but not limited to 3300MHz-6000MHz and sub-bands contained within this frequency band range, as the first frequency band; and a frequency band range, for example, including but not limited to 380MHz-2700MHz and sub-bands contained within this frequency band range, as the second frequency band. Furthermore, the first and second frequency bands can each be allocated into at least two allocated frequency bands according to actual needs. The second frequency band may include, for example, the first allocated frequency band and the second allocated frequency band. The first allocated frequency band may include, for example, 698MHz-1270MHz, and the second allocated frequency band may include, for example, 1410MHz-2700MHz. Additionally, the first frequency band can be allocated into at least two allocated frequency bands according to actual needs, for example, including a third, fourth, and fifth allocated frequency band. The third allocated frequency band includes, but is not limited to, 3300MHz-3800MHz; the fourth allocated frequency band includes, but is not limited to, 4800MHz-4960MHz; and the fifth allocated frequency band includes, but is not limited to, 5250MHz-6000MHz.

[0039] It should be noted that there are many specific allocation methods for the first, second, third, fourth, and fifth frequency bands, which can be flexibly adjusted and set according to actual needs, and no special restrictions are imposed here.

[0040] It should also be noted that the number of allocated frequency bands in the second frequency band is not limited, that is, it is not limited to the first and second allocated frequency bands in the above embodiments, and can be divided into more allocated frequency bands according to actual needs. Similarly, the number of allocated frequency bands in the first frequency band can be more or less according to actual needs, and there is no special limitation here.

[0041] In some embodiments, the multi-system access platform provided in this application can combine / splitter multiple frequency bands, including 380MHz-2700MHz, 3300MHz-6000MHz, or sub-bands included in the above frequency band range. Among them, 380MHz-2700MHz and the sub-bands included in the frequency band range belong to the common cavity frequency band, while 3300MHz-6000MHz and the sub-bands included in the frequency band range belong to the 5G frequency band. This allows the combiner of this application to combine / splitter two frequency bands with large frequency band differences, which facilitates the construction of 5G systems and helps to co-construct 5G systems with existing 2G / 3G / 4G systems.

[0042] Please see Figures 4 to 12 In one embodiment, the multi-system access platform of this embodiment can be a single-sided cavity structure (such as...). Figures 4 to 7 As shown), it can also be a double-sided cavity structure (such as...). Figures 8 to 12 As shown in the figure, no special restrictions are imposed here; adjustments and settings can be made flexibly according to actual needs.

[0043] The size of a multi-system access platform is positively correlated with the number of channels. In the design of a multi-system access platform, when the number of channels is small, a single-sided cavity is usually used; if the number of channels increases, a double-sided cavity is usually used to reduce the planar size.

[0044] For example, the multi-system access platform includes a housing 10 and a cover. The housing 10 has an inner cavity, and the cover closes the housing 10 to seal the inner cavity. The cover is not shown in the figure to illustrate the internal structure of the housing 10.

[0045] Please see Figure 1 and Figure 4 For example, the multi-system access platform also includes a common connector 20 and multiple signal connectors 30. The common connector 20 is disposed on the first side wall of the housing 10 and extends into the inner cavity of the housing 10. The signal connectors 30 are disposed on the second side wall of the housing 10 and extend into the inner cavity of the housing 10. Specifically, the first side wall and the second side wall can be arranged opposite to each other. There are at least two signal connectors 30, but the specific number is not limited here and can be flexibly adjusted and set according to actual needs.

[0046] Please see Figure 1 and Figure 4 For example, housing 10 is provided with low-pass filter 11, first band-pass filter 12, second band-pass filter 13, first signal connector 31, second signal connector 32 and common connector 20.

[0047] The first signal connector 31 is used to connect to the first frequency band signal, and the second signal connector 32 is used to connect to the second frequency band signal. The first frequency band is higher than the second frequency band.

[0048] A first bandpass filter 12 is disposed between a first signal connector 31 and a common connector 20, and a low-pass filter 11 and a second bandpass filter 13 are disposed between a second signal connector 32 and a common connector 20. One end of the first bandpass filter 12 is connected to the first signal connector 31, one end of the second bandpass filter 13 is connected to the second signal connector 32, and the other end of the second bandpass filter 13 is connected to one end of the low-pass filter 11. The other end of the low-pass filter 11 and the other end of the first bandpass filter 12 are combined and then connected to the common connector 20.

[0049] Therefore, the first bandpass filter 12 can transmit signals in the first frequency band, the second bandpass filter 13 can transmit signals in the second frequency band, and the low-pass filter 11 can transmit signals in the second frequency band and filter out parasitic harmonic peaks generated by the second bandpass filter 13.

[0050] The first bandpass filter 12 and the second bandpass filter 13 are each connected to a signal connector 30, thereby enabling each to transmit signals to or receive signals from the signal connector 30. The low-pass filter 11 and the first bandpass filter 12 are combined and connected to a common connector 20, as shown in the example below. Figure 1 As shown in a, this enables signal transmission to or reception of signals from common connector 20.

[0051] Understandably, since one end of the first bandpass filter 12 is connected to the first signal connector 31, one end of the second bandpass filter 13 is connected to the second signal connector 32, and the other end of the second bandpass filter 13 is connected to one end of the low-pass filter 11, and the other end of the low-pass filter 11 is combined with the other end of the first bandpass filter 12 and then connected to the common connector 20, the low-pass filter 11 and the first bandpass filter 12 work together to form a first-stage filter, enabling the transmission of signals in both the first and second frequency bands. The second bandpass filter 13 enables signal transmission to the low-pass filter 11 and then from the low-pass filter 11 to the common connector 20, meaning the second bandpass filter 13 is a second-stage filter. Furthermore, the low-pass filter 11 can filter out the parasitic harmonic peaks generated by the second bandpass filter 13, avoiding spurious interference and blocking interference caused by these peaks to the first frequency band signal. This improves the isolation between the first and second frequency band signals, thereby expanding the bandwidth and enhancing product performance.

[0052] In one specific embodiment, the first frequency band includes, but is not limited to, 3300MHz-6000MHz, and the second frequency band includes, but is not limited to, 380MHz-2700MHz, with no particular limitation on the specific size. The low-pass filter 11 can effectively filter out parasitic harmonic peaks generated in the second bandpass filter 13 at 4000MHz-6000MHz, such as those from resonant pillars, flybars, and coupling rods, thereby improving the isolation between the first and second frequency bands to an isolation level of over 80dB. Thus, the multi-system access platform in this application can support free access for signals including, but not limited to, those from 698MHz-6000MHz. Therefore, the filter of the multi-system access platform in this example adopts a two-level architecture, not only covering the BeiDou GNSS service channels and subsequent mobile network expansion bands to meet the needs of future mobile network upgrades, but also achieving the high isolation requirement between high and low frequency channels. Furthermore, based on this design, multi-system access platforms with more signal connectors 30 can be easily and quickly derived and designed.

[0053] In one embodiment, please refer to [the document / reference]. Figure 1 The second frequency band includes the first allocation frequency band and the second allocation frequency band, with the first allocation frequency band being lower than the second allocation frequency band. The second signal connector 32 includes a first allocation signal connector 321 and a second allocation signal connector 322. The first allocation signal connector 321 is used to receive signals from the first allocation frequency band, and the second allocation signal connector 322 is used to receive signals from the second allocation frequency band. Optionally, the first allocation frequency band is a low-frequency band, including 698MHz-1270MHz. The second allocation frequency band is a mid-frequency band, including 1410MHz-2700MHz. The second bandpass filter 13 includes a first filter 1301 and a second filter 1302. One end of the first filter 1301 is connected to the first allocation signal connector 321, and one end of the second filter 1302 is connected to the second allocation signal connector 322. The other ends of the first filter 1301 and the other ends of the second filter 1302 are combined and then connected to the low-pass filter 11. In other words, the first filter 1301 can transmit signals in the first allocated frequency band, and the second filter 1302 can transmit signals in the second allocated frequency band. Therefore, the first filter 1301 and the second filter 1302 can respectively enable access to the 698MHz-1270MHz and 1410MHz-2700MHz frequency bands. Compared to the current mainstream products' access frequency bands of 698MHz-960MHz and 1710MHz-2690MHz, the access bandwidth is increased by 310MHz, meeting the access requirements of BeiDou GNSS service channels in the 1160MHz-1220MHz and 1558MHz-1578MHz frequency bands.

[0054] In another embodiment, please refer to Figure 2 Compared to Figure 1 The difference in the illustrated structure is that the second filter 1302 used for transmitting the second allocated frequency band may include at least two third filters 131. After being combined, the at least two third filters 131 are then combined with the first filter 1301 used for transmitting the first allocated frequency band and connected to the low-pass filter 11. The combining node of the at least two third filters 131 is as follows: Figure 2 As shown in C. That is, the second allocated frequency band can be further allocated to form more allocated frequency bands. Specifically, 1410MHz-2700MHz is allocated, for example, as 1410MHz-2170MHz and 2300MHz-2700MHz, thereby increasing the number of signal connectors 30 to meet user needs.

[0055] Furthermore, in order to reduce the size, the multi-system access platform adopts a double-sided cavity structure, with at least one third filter 131 arranged in the second layer of the double-sided cavity structure, and the remaining filters arranged in the first layer of the double-sided cavity structure.

[0056] In another embodiment, please refer to Figure 3 Compared to Figure 1 The difference in the structure shown is that the second filter 1302 used for transmitting the second allocated frequency band may include at least two third filters 131, and the number is not limited to... Figure 2 The two shown are not the only ones; there can be more, and they can be specifically arranged in the second layer of the double-sided cavity structure. Furthermore, the first filter 1301 for transmitting the first allocated frequency band can also include at least two fourth filters 132, which are combined and connected to a low-pass filter 11, and are specifically arranged in the first layer of the double-sided cavity structure. Additionally, the first bandpass filter 12 can include at least two fifth filters 121, one end of each of the at least two fifth filters 121 being connected to a first signal connector 31, and the other ends of the at least two fifth filters 121 being combined and connected to a common connector 20, and are specifically arranged in the first layer of the double-sided cavity structure. Thus, it can be seen that... Figure 1 The first bandpass filter 12 and each of the second bandpass filters 13 shown can be expanded into multiple filters according to actual needs, so that the frequency band can be further allocated, the number of signal connectors 30 can be increased, so as to improve product performance and meet the signal access needs of more external networks.

[0057] in, Figures 1 to 3 This is a schematic diagram of a multi-system access platform according to an embodiment of this application. To make the multi-system access platform clearer, the following will be combined with... Figures 4 to 12 The specific structure of the multi-system access platform in this application embodiment will be described in detail.

[0058] Please see Figure 4 and Figure 5For example, the low-pass filter 11 is a high-low impedance air-suspended stripline structure. Specifically, the housing 10 has a first channel 101. A support platform 1011 is provided within the first channel 101. The support platform 1011 can be connected to the bottom wall or side wall of the first channel 101, without limitation. The low-pass filter 11 is disposed within the first channel 101 and includes filter stubs 111. The filter stubs 111 are mounted on the support platform 1011, which supports the filter stubs 111, allowing them to be suspended, thus forming a high-low impedance air-suspended stripline. An insulating element 112 is provided between the filter stubs 111 and the support platform 1011. The insulating element 112 includes, but is not limited to, a dielectric sheet. The insulating element 112 insulates the filter stubs 111 from the support platform 1011, thereby preventing the filter stubs 111 from grounding and causing a short circuit. Thus, the filter stub 111 can effectively filter out parasitic harmonic peaks generated in the first frequency band by resonant pillars, flybars, and coupling rods in the second-stage filter. Furthermore, the isolation level can be adjusted by changing and adjusting the shape of the filter stub 111.

[0059] For example, the filter stub 111 may be, but is not limited to, sheet-like or rod-like shapes, etc., and is not restricted here. It can be flexibly adjusted and set according to actual needs. In this embodiment, the filter stub 111 is specifically set as a conductive sheet, but this is not a limitation.

[0060] Please see Figure 4 and Figure 5 For example, the filter stub 111 includes multiple filter units 1111 connected in sequence. Each filter unit 1111 includes a first conductive sheet 11111 and a second conductive sheet 11112, with the first conductive sheet 11111 and the second conductive sheet 11112 connected. The width of the first conductive sheet 11111 is greater than the width of the second conductive sheet 11112. The first conductive sheet 11111 is mounted on a support platform 1011, and an insulating member 112 is disposed between the first conductive sheet 11111 and the support platform 1011. The second conductive sheet 11112 is suspended. The first conductive sheet 11111 can be considered equivalent to a capacitor, and the second conductive sheet 11112 can be considered equivalent to an inductor. The structure formed by the first conductive sheet 11111 and the second conductive sheet 11112 functions as a filter, effectively filtering out parasitic harmonic peaks generated in the first frequency band by resonant pillars, flybars, and coupling rods in the secondary filter. Furthermore, by flexibly adjusting and setting the number of filter units 1111, the isolation can be adjusted accordingly.

[0061] For example, multiple support platforms 1011 are provided, and the multiple support platforms 1011 are arranged sequentially at intervals along the length direction of the filter branch 111. Each first conductive sheet 11111 is correspondingly installed on each support platform 1011. In this way, the filter branch 111 is stably supported.

[0062] For example, the low-pass filter 11 also includes an insulating fastener 113. The insulating fastener 113 includes, but is not limited to, insulating screws, insulating bolts, or insulating rivets. The filter stub 111 is secured to the support base 1011 by the insulating fastener 113.

[0063] Based on the aforementioned embodiments, the low-pass filter 11 further includes a first tuning element 114. The first tuning element 114 includes, but is not limited to, a tuning screw or tuning rod. The first tuning element 114 is adjustablely disposed on the side wall of the housing 10 and extends into the housing 10. Thus, compared to disposing the first tuning element 114 at the top of the housing 10, when the first tuning element 114 is arranged along the side wall perpendicular to the first channel 101, it no longer extends perpendicular to the filter stub 111, but can be arranged parallel to the filter stub 111. This not only increases the tuning amount of the first tuning element 114 but also reduces its length, thereby effectively avoiding the adverse effects on the first frequency band caused by parasitic harmonic peaks generated by the tuning element.

[0064] It should be noted that the "vertical" in this embodiment is not "vertical" in a strict mathematical sense, but rather "vertical" as determined by human visual observation, and deviations are allowed.

[0065] The number of first tuning elements 114 is not limited to one, but can be multiple. Multiple first tuning elements 114 are arranged sequentially at intervals along the length of the filter stub 111. The first tuning elements 114 can extend into the support platform 1011 or into the area between two adjacent support platforms 1011; no particular limitation is made here. When extended into the support platform 1011, the first tuning element 114 has a significant adjustment effect on the first conductive sheet 11111 located on the support platform 1011; when extended into the area between two adjacent support platforms 1011, the first tuning element 114 has a significant adjustment effect on the second conductive sheet 11112 located between the two adjacent support platforms 1011. Therefore, the specific position of the first tuning element 114 on the side wall of the first channel 101 can be flexibly adjusted and set according to actual needs to optimize the performance of the low-pass filter 11.

[0066] Based on the aforementioned embodiments, a tap bar 21 is inserted into the common connector 20. One end of the filter stub 111 is connected to the tap bar 21, specifically by welding, thereby enabling signal transmission in the first frequency band. The first bandpass filter 12 includes, but is not limited to, a coaxial cavity structure. Specifically, the housing 10 also provides a second channel 102. The first bandpass filter 12 includes a plurality of first resonant pillars 122. The plurality of first resonant pillars 122 are arranged sequentially and at intervals along the length of the second channel 102. Among them, the sidewall of the first resonant pillar 122 closest to the tap bar 21 is provided with a coupling groove 1221, and the tap bar 21 is at least partially disposed in the coupling groove 1221 and coupled to the first resonant pillar 122, thereby enabling signal transmission in the second frequency band. Furthermore, the coupling slot 1221 is designed as a non-enclosed slot. Compared to the coupling hole, the coupling slot 1221 is only arranged around the outer periphery of the tap 21. This can effectively eliminate the parasitic harmonic peaks on the tap 21 itself, avoid interference to the first frequency band, improve isolation, and thus achieve the expansion of port bandwidth and improve product performance.

[0067] The coupling strength between the tap bar 21 and the first resonant post 122 can be adaptively adjusted by adjusting the diameter of the tap bar 21 or the depth of the coupling groove 1221, or by filling the coupling gap with a medium. The specific choice can be made flexibly according to actual needs, and no special restrictions are imposed here.

[0068] Based on the aforementioned embodiment, the cross-sectional profile of the coupling groove 1221 along its extension direction is arc-shaped. This facilitates the fabrication of the coupling groove 1221 on the sidewall of the first resonant pillar 122.

[0069] Of course, in some alternative schemes, the cross-sectional profile of the coupling groove 1221 can also be set as a rectangle or other polygons or other regular and irregular shapes, without any restrictions.

[0070] In some embodiments, the coupling groove 1221 is adapted to the outer wall of the tap 21. This reduces the distance between the inner wall of the coupling groove 1221 and the tap 21, thereby increasing the amount of coupling between them.

[0071] For example, one end of the first channel 101 is connected to one end of the second channel 102, and the common connector 20 is located at the part where the first channel 101 and the second channel 102 are connected to each other.

[0072] Please see Figure 4 and Figure 7 , Figure 4 and Figure 7 The structure shown is similar to Figure 1 , 2 The principle block diagram shown corresponds to this. Figure 7 The structure shown is the specific structure at the combining node b. Based on the aforementioned embodiment, the housing 10 also includes a third channel 103 and a fourth channel 104. One end of the third channel 103 is connected to one end of the fourth channel 104, and the connection point is arranged adjacent to the first channel 101, thus facilitating connection with the low-pass filter 11. The first filter 1301 includes a plurality of second resonant pillars 133, which are disposed within the third channel 103. Specifically, the plurality of second resonant pillars 133 are arranged at intervals along the length direction of the third channel 103. The second filter 1302 includes a plurality of third resonant pillars 134, which are disposed within the fourth channel 104. Specifically, the plurality of third resonant pillars 134 are arranged at intervals along the length direction of the fourth channel 104.

[0073] In addition, the multi-system access platform also includes a coupling rod 40 and a conductive element 50 disposed at the connection point. The coupling rod 40 penetrates the partition wall 14 between the low-pass filter 11 and the second band-pass filter 13. Specifically, a partition wall 14 is provided between the low-pass filter 11 and the first filter 1301, and the coupling rod 40 penetrates the partition wall 14 between the low-pass filter 11 and the first filter 1301. A first support medium 41 is provided on the coupling rod 40, and the first support medium 41 is disposed on the partition wall 14, enabling the coupling rod 40 to be securely installed on the partition wall 14. The first support medium 41 is sleeved on the coupling rod 40, enabling the coupling rod 40 and the partition wall 14 to be mutually insulated and isolated. Optionally, the partition wall 14 has a hole or window, and the first support medium 41 is disposed in the hole or window. The first support medium 41 is, but is not limited to, made of polytetrafluoroethylene (PTFE). One end of the coupling rod 40 is connected to the end of the filter stub 111 of the low-pass filter 11 that is away from the common connector 20. Specifically, the coupling rod 40 and the filter stub 111 are electrically connected by welding or snap-fitting. The other end of the coupling rod 40 passes through and is coupled to one of the third resonant pillars 134 closest to the connection point, thereby enabling signal interconnection with the low-pass filter 11. Optionally, the coupling rod 40 is provided with a second support medium, which is disposed between the coupling rod 40 and the third resonant pillar 134. This increases the stability between the coupling rod 40 and the third resonant pillar 134 and improves the coupling bandwidth, thereby improving the performance of the second allocated frequency band. Of course, the coupling rod 40 can also be suspended inside the third resonant pillar 134, using air to achieve insulation isolation between the two.

[0074] For example, one of the second resonant pillars 133 closest to the coupling rod 40 is connected to the coupling rod 40 via a conductive element 50, thereby enabling signal interconnection with the low-pass filter 11. The conductive element 50 may be, but is not limited to, silver wire, copper wire, aluminum wire, etc., and is not particularly limited herein. The conductive element 50 and the second resonant pillar 133 may be connected by various methods, including but not limited to welding, snap-fitting, or fasteners, and are not limited herein. The conductive element 50 and the coupling rod 40 may also be connected by various methods, including but not limited to welding, snap-fitting, or fasteners, and are not limited herein.

[0075] Please see Figures 8 to 12 Compared to Figures 4 to 7 As shown in the structure, the multi-system access platform adopts a double-sided cavity structure, which can reduce the volume and achieve better port expansion. In some embodiments, the housing 10 includes a first layer and a second layer stacked along the thickness direction. A partition 15 is provided between the first layer and the second layer. The second filter 1302 includes two third filters 131, so that the second allocated frequency band can be further allocated into more allocated frequency bands. The two third filters 131 are combined and connected to the low-pass filter 11, with one third filter 131 arranged in the first layer and the other third filter 131 arranged in the second layer.

[0076] Based on the aforementioned embodiments, the housing 10 further includes a fourth channel 104, of which two fourth channels 104 are provided, one located in the first layer and the other in the second layer. One third filter 131 includes a plurality of fourth resonant pillars 1311 arranged at intervals in the first layer. Specifically, the plurality of fourth resonant pillars 1311 are disposed within the fourth channel 104 of the first layer. The other third filter 131 includes a plurality of fifth resonant pillars 1312 arranged at intervals in the second layer and a sixth resonant pillar 1313 disposed in the first layer. Specifically, the plurality of fifth resonant pillars 1312 are disposed within the fourth channel 104 of the second layer, and the sixth resonant pillar 1313 is disposed within the fourth channel 104 of the first layer. The sixth resonant pillar 1313 and one of the fifth resonant pillars 1312 are arranged along the thickness direction of the partition 15, and a coupling window 151 is formed on the partition 15, through which the sixth resonant pillar 1313 is connected to one of the fifth resonant pillars 1312. Optionally, the coupling window 151 is arranged around the outer periphery of the sixth resonant pillar 1313. Specifically, the coupling window 151 is configured as a C-shape, for example. The sixth resonant pillar 1313 is also connected to one of the fourth resonant pillars 1311, thereby enabling the signals of the two third filters 131 to be combined, and the combined signal is transmitted to the low-pass filter 11 by the fourth resonant pillar 1311.

[0077] It should be noted that the fourth resonant post 1311, which is closest to the low-pass filter 11, has a strong coupling. If the sixth resonant post 1313 is selected to couple with the fourth resonant post 1311, which is closest to the low-pass filter 11, the product performance will be reduced. Conversely, if the fourth resonant post 1311 is selected to be coupled further away from the low-pass filter 11, the signal transmission path will increase, potentially leading to signal loss and reduced product performance. Therefore, in this embodiment, please refer to... Figure 8 and Figure 11 Along a direction away from the low-pass filter 11, the fourth resonant pillar 1311, which is sequentially positioned second, third, or fourth, is coupled to the sixth resonant pillar 1313. In this embodiment, please refer to... Figure 11 Specifically, we will take the coupling of the second-ranked fourth resonant pillar 1311 with the sixth resonant pillar 1313 as an example, but this is not a limitation.

[0078] Based on the aforementioned embodiments, another third filter 131 further includes a second tuning element 1314. The second tuning element 1314 may include, but is not limited to, a tuning screw or tuning rod, etc., and is not particularly limited here. An adjustment hole 1315 is provided between the sixth resonant post 1313 and one of the fifth resonant posts 1312. The second tuning element 1314 is adjustablely positioned in the housing 10, extending into the adjustment hole 1315. Thus, by adjusting the depth of the second tuning element 1314 extending into the adjustment hole 1315, the coupling amount of the coupling window 151 can be adaptively adjusted, ensuring that the coupling amount of the coupling window meets the requirements, thereby improving product performance. Furthermore, this not only makes the structural design more flexible and versatile but also reduces the difficulty of product debugging.

[0079] For example, the second tuner 1314 is provided with a third support medium 1316, which is sleeved outside the second tuner 1314 and can increase the coupling amount of the coupling window 151.

[0080] Based on the aforementioned embodiments, another third filter 131 further includes a third tuning element. The third tuning element includes, but is not limited to, a tuning screw or tuning rod. The third tuning element is adjustablely positioned within the housing 10. The third tuning element can extend into the fourth channel 104 of the second layer and be arranged opposite to the side wall of the sixth resonant pillar 1313, thereby achieving adjustable coupling. Alternatively, the third tuning element can extend into the fourth channel 104 of the first layer and be arranged opposite to the side wall of the fifth resonant pillar 1312 corresponding to the sixth resonant pillar 1313, similarly achieving adjustable coupling. Figure 12 The third tuner is not shown; only the mounting hole 1317 on the housing 10 for mounting the third tuner is shown.

[0081] In summary, in order to adjust the coupling amount between the sixth resonant pillar 1313 and its corresponding fifth resonant pillar 1312, it can be achieved by changing the size of the coupling window 151, increasing the tuning depth of the second tuner 1314, adding multiple third tuners, or by setting a third support medium 1316 on the second tuner 1314.

[0082] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0083] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0085] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0086] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A multi-system access platform, characterized in that, The device includes a housing, which is provided with a low-pass filter, a first band-pass filter, a second band-pass filter, a first signal connector, a second signal connector, and a common connector. The first signal connector is used to receive a first frequency band signal, and the second signal connector is used to receive a second frequency band signal. The first frequency band is higher than the second frequency band. The first band-pass filter is disposed between the first signal connector and the common connector. The low-pass filter and the second band-pass filter are disposed between the second signal connector and the common connector. One end of the first band-pass filter is connected to the first signal connector, one end of the second band-pass filter is connected to the second signal connector, and the other end of the second band-pass filter is connected to one end of the low-pass filter. The other end of the low-pass filter and the other end of the first band-pass filter are combined and then connected to the common connector.

2. The multi-system access platform according to claim 1, characterized in that, The low-pass filter is a high- and low-impedance air-suspended stripline structure.

3. The multi-system access platform according to claim 2, characterized in that, The high and low impedance air-suspended stripline structure includes a filter branch disposed within the housing; a support platform is provided within the housing, the filter branch is mounted on the support platform, and an insulating element is provided between the filter branch and the support platform, the insulating element making the filter branch and the support platform mutually insulated and isolated.

4. The multi-system access platform according to claim 3, characterized in that, The multi-system access platform further includes a first tuning element, which is tunably disposed on the side wall of the housing and extends into the housing to tune the low-pass filter from the side.

5. The multi-system access platform according to claim 4, characterized in that, The first tuning element is configured as a plurality of elements, and the plurality of first tuning elements are arranged sequentially at intervals along the length direction of the filter stub.

6. The multi-system access platform according to claim 3, characterized in that, A tap bar is inserted into the common connector, and one end of the filter stub is connected to the tap bar; the first bandpass filter includes a plurality of first resonant pillars arranged sequentially at intervals in the housing, and the side wall of the first resonant pillar closest to the tap bar is provided with a coupling groove, and the tap bar is at least partially disposed in the coupling groove and coupled to the first resonant pillar.

7. The multi-system access platform according to claim 6, characterized in that, The cross-sectional profile of the coupling groove along its extension direction is arc-shaped.

8. The multi-system access platform according to claim 1, characterized in that, The second signal connector includes a first distribution signal connector and a second distribution signal connector. The first distribution signal connector is used to receive a first distribution frequency band signal, and the second distribution signal connector is used to receive a second distribution frequency band signal. The second bandpass filter includes a first filter and a second filter. One end of the first filter is connected to the first distribution signal connector, and one end of the second filter is connected to the second distribution signal connector. The other end of the first filter and the other end of the second filter are combined and then connected to the low-pass filter.

9. The multi-system access platform according to claim 8, characterized in that, The first filter includes a plurality of second resonant pillars arranged sequentially at intervals within the housing; the second filter includes a plurality of third resonant pillars arranged sequentially at intervals within the housing; the multi-system access platform further includes a coupling rod and a conductive element, the coupling rod penetrating the partition wall between the low-pass filter and the second band-pass filter, and the coupling rod is provided with a first supporting medium disposed in the partition wall; one end of the coupling rod is connected to the end of the filter branch of the low-pass filter away from the common connector, and the other end of the coupling rod passes through and is coupled to one of the third resonant pillars closest to the low-pass filter; one of the second resonant pillars closest to the coupling rod is connected to the coupling rod through the conductive element.

10. The multi-system access platform according to claim 8, characterized in that, The housing includes a first layer and a second layer stacked along the thickness direction, with a partition between the first layer and the second layer; the second filter includes two third filters, which are combined and connected to the low-pass filter, with one third filter arranged in the first layer and the other third filter arranged in the second layer.

11. The multi-system access platform according to claim 10, characterized in that, One of the third filters further includes a plurality of fourth resonant pillars arranged at intervals in the first layer; the other third filter includes a plurality of fifth resonant pillars arranged at intervals in the second layer and a sixth resonant pillar arranged in the first layer, the sixth resonant pillar and one of the fifth resonant pillars being arranged along the thickness direction of the partition, the partition having a coupling window, the sixth resonant pillar being connected to one of the fifth resonant pillars through the coupling window; the sixth resonant pillar is also connected to one of the fourth resonant pillars.

12. The multi-system access platform according to claim 11, characterized in that, Another of the third filters also includes a second tuner; an adjustment hole is provided between the sixth resonant post and one of the fifth resonant posts, and the second tuner is adjustablely disposed in the housing, extending into the adjustment hole.

13. The multi-system access platform according to claim 11, characterized in that, Another of the third filters also includes a third tuner; the third tuner is tunably disposed in the housing, and is arranged opposite to the side wall of the sixth resonant post or opposite to the side wall of the fifth resonant post corresponding to the sixth resonant post.

14. The multi-system access platform according to claim 8, characterized in that, The first frequency band includes 380MHz-2700MHz; the second frequency band includes 3300MHz-6000MHz; the first allocated frequency band includes 698MHz-1270MHz, and the second allocated frequency band includes 1410MHz-2700MHz.

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