Multi-combiner
By using a double-layer cavity structure and an asymmetric arrangement of resonant cavities, combined with tuning screws and embedded duplexers, the problem of miniaturization of wide-bandwidth, high-power multi-frequency combiners in 5G communication is solved, achieving efficient multi-frequency combining and cost savings.
Patent Information
- Application Number
- CN202511862335.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-02-24
AI Technical Summary
Existing multi-combiners are insufficient to meet the communication requirements of wide bandwidth, high power and miniaturization, especially in 5G construction, where combiners need to balance coverage and cost-effectiveness.
It adopts a dual-cavity structure, with the mid-frequency passband and low-frequency passband arranged asymmetrically and symmetrically on the front and back layers of the cavity, respectively. Multiple resonant cavities are arranged in different structural shapes, combined with tuning screws and embedded duplexer design, to achieve flexible signal tuning and efficient combining.
The filter's filtering performance has been improved, the number of channels has been increased, communication functions have been enhanced, the device size has been reduced, and the cost has been lowered, thus meeting the multi-frequency combining requirements of 5G communication systems.
Smart Images
Figure CN121566089A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of multi-frequency combiner technology, and more specifically, to a multi-frequency combiner. Background Technology
[0002] As a core component of combiners, multi-band combiners are becoming increasingly popular due to growing communication demands. Wide bandwidth, high power, miniaturization, and multiplexing are emerging trends in future communication development. 5G is driving demand for ultra-wideband multi-channel combiners, with manufacturers like Huawei and ZTE clearly identifying ultra-wideband multi-channel as a key technology direction. The commercialization of millimeter-wave bands (such as n257 and n258) is further stimulating the high-frequency combiner market. Operators are favoring mid-band frequencies in 5G deployments, requiring combiners to balance coverage and cost-effectiveness. The radio frequency combiner industry continues to expand, making multi-frequency combiners a crucial technology and an essential step in communication system development. Summary of the Invention
[0003] The embodiments of this application provide a multi-combiner to solve the technical problems existing in the prior art.
[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0005] According to a first aspect of the embodiments of this application, a multiple combiner is provided, comprising: A cavity, wherein a first intermediate frequency passband, a second intermediate frequency passband, a first low frequency passband, and a second low frequency passband are provided; The cavity adopts a double-layer cavity structure, including a front layer and a back layer; The receiving and transmitting channels of the first and second intermediate frequency passbands are arranged asymmetrically on the front layer of the cavity. The receiving and transmitting channels of the first low-frequency passband and the second low-frequency passband are arranged symmetrically on the back layer of the cavity.
[0006] In some embodiments of this application, based on the aforementioned scheme, the receiving and transmitting channels of the first intermediate frequency passband and the second intermediate frequency passband, as well as the receiving and transmitting channels of the first low frequency passband and the second low frequency passband, are all composed of multiple resonant cavities arranged in different structural shapes.
[0007] In some embodiments of this application, based on the aforementioned scheme, each resonant cavity is provided with a tuned resonator, and a tuning screw is provided above the center of the tuned resonator.
[0008] In some embodiments of this application, based on the aforementioned scheme, multiple resonant cavities are arranged in a triangular, intersecting, or star-shaped configuration.
[0009] In some embodiments of this application, based on the foregoing scheme, the transmission channels of the first intermediate frequency passband and the second intermediate frequency passband include 9-cavity filters; The transmission channels of the first low-frequency passband and the second low-frequency passband include a 3-cavity filter and a 9-cavity filter.
[0010] In some embodiments of this application, based on the aforementioned scheme, the transmission channels of the first low-frequency passband and the second low-frequency passband are connected by an embedded duplexer and then connected to an SMA connector.
[0011] In some embodiments of this application, based on the foregoing scheme, the receiving and transmitting channels of the first intermediate frequency passband and the second intermediate frequency passband, as well as the receiving and transmitting channels of the first low frequency passband and the second low frequency passband, are all connected to the antenna port; The antenna port is designed with a window, and the antenna is coupled above the window to extract signals.
[0012] The technical solution of this application can improve the filtering performance of the filter and the feasibility of multi-frequency combining. By expanding the number of combining channels, the passband of the communication system can be increased, enabling communication with different bandwidths to be integrated into a base station system, thereby enhancing the application range of the base station, improving communication functions, and saving communication system costs.
[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 A front schematic diagram of a multiplexer according to one embodiment of this application is shown; Figure 2 A schematic diagram of the back of a multi-combiner according to one embodiment of this application is shown; Figure 3 A schematic diagram of a filter channel according to an embodiment of this application is shown. Detailed Implementation
[0015] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.
[0016] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0017] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.
[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0020] The following detailed description of some embodiments of this application will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0021] To address the technical problems existing in the prior art, embodiments of this application provide a multi-combiner, which includes: A cavity, wherein a first intermediate frequency passband, a second intermediate frequency passband, a first low frequency passband, and a second low frequency passband are provided; The cavity adopts a double-layer cavity structure, including a front layer and a back layer; The receiving and transmitting channels of the first and second intermediate frequency passbands are arranged asymmetrically on the front layer of the cavity. The receiving and transmitting channels of the first low-frequency passband and the second low-frequency passband are arranged symmetrically on the back layer of the cavity.
[0022] For example, see Figure 1 The image shows a front view of a multiplexer according to one embodiment of this application.
[0023] See Figure 2 The diagram shows a rear view of a multi-combiner according to one embodiment of the present application.
[0024] like Figure 1 , Figure 2 As shown, the multi-combiner cavity has a double-layer cavity structure. The front layer uses an asymmetrical arrangement, while the back layer uses a symmetrical arrangement, with 16 channels arranged on the front and back of the cavity respectively. The front layer contains the TX (receive channel) and RX (transmit channel) of the intermediate frequency passband High1, and the TX and RX of the intermediate frequency passband High2. The back layer contains the TX and RX of the low frequency passband RXLOW1, and the TX and RX of the low frequency passband RXLOW2. The design and separation of the upper and lower layers help to maintain a consistent height of each filter cavity, and the shared base plate also facilitates the smooth flow of the casting liquid during die casting. This ensures the feasibility of die casting and makes better use of the filter space.
[0025] In some feasible embodiments, based on the aforementioned scheme, the receiving and transmitting channels of the first intermediate frequency passband and the second intermediate frequency passband, as well as the receiving and transmitting channels of the first low frequency passband and the second low frequency passband, are all composed of multiple resonant cavities arranged in different structural shapes.
[0026] For example, such as Figure 1 , Figure 2 As shown, the TX and RX of the mid-frequency passbands High1 and High2, and the TX and RX of the low-frequency passbands RXLOW1 and RXLOW2, are all arranged in different structural shapes from multiple resonant cavities, such as triangular, cross-shaped, and star-shaped. These arrangements can increase the coupling paths between resonant cavities, thereby improving the frequency selectivity of the filter, increasing out-of-band rejection, reducing debugging time, and making the filter design more flexible.
[0027] In some feasible embodiments, based on the aforementioned scheme, each resonant cavity is provided with a tuned resonator, and a tuning screw is provided above the center of the tuned resonator.
[0028] It should be noted that in this embodiment, the resonant frequency of the resonant cavity unit can be tuned by adjusting the depth of the tuning screw, ensuring that the passband of the filter meets the design requirements. This design allows for flexible tuning, effectively ensuring the manufacturability of the filter and reducing manufacturing difficulty, thereby enabling the application of the filter.
[0029] In some feasible embodiments, based on the foregoing scheme, the transmission channels of the first intermediate frequency passband and the second intermediate frequency passband include 9-cavity filters; The transmission channels of the first low-frequency passband and the second low-frequency passband include a 3-cavity filter and a 9-cavity filter.
[0030] For example, a 3-cavity filter such as Figure 3 As shown by the long black line, there are eight frequency bands at the antenna port: RXLOW1-RX, RXLOW2-RX, RXLOWRX, 1RXLOWRX, High1-RX, High1-TX, High2-TX, RXLOW1-TX, and RXLOW1-TX. The RXLOW1-TX band is further connected to the power amplifier port via an external jumper and a 3-cavity filter (RXLOW2-TX). To enable the RXLOW passband function, 3-cavity and 9-cavity RXLOW filters were designed.
[0031] In some feasible embodiments, based on the aforementioned scheme, the transmission channels of the first low-frequency passband and the second low-frequency passband are connected by an embedded duplexer and then connected to an SMA connector.
[0032] Understandably, based on the filter's performance requirements, it's necessary to extract two signals, RXLOW1-RX and RXLOW2-RX, from the antenna port. After extraction, these signals need to be recombined and output from the SMA, then passed through a pass-through to the RX Low connector to output the RXLOW1-RX and RXLOW2-RX combined signal. This embedded duplexer, which first splits and then recombines, fulfills the communication requirements and makes embedded duplexer solutions feasible. It not only saves on recombining costs but also saves design space, providing an option for miniaturization requirements.
[0033] In some feasible embodiments, based on the aforementioned scheme, the receiving and transmitting channels of the first intermediate frequency passband and the second intermediate frequency passband, as well as the receiving and transmitting channels of the first low frequency passband and the second low frequency passband, are all connected to the antenna port; The antenna port is designed with a window, and the antenna is coupled above the window to extract signals.
[0034] Understandably, this design allows for the detection of external signals. The design requires a certain amount of space, and the effective arrangement of the cavity logic provides space for the coupling board design. This design scheme ensures both the feasibility of combining the eight channels and the feasibility of extracting monitoring signals through coupling.
[0035] like Figure 3 As shown, the 8 signals are extracted from antenna port 2 (the same applies to antenna port 1).
[0036] Channel 1: The RXLOW RX signal is extracted from antenna port 2, goes to the SMA connector, connects to an external jumper, goes back to the SMA connector, and then goes to the RX LOW connector for output via a straight-through cable.
[0037] 2-channel: The two signals RXLOW1 and RXLOW2 are extracted from antenna port 2, combined to SMA connector, connected to an external jumper, then to another SMA connector, and finally output to RXLOW connector via a straight-through cable.
[0038] 3-channel: The UL1RXLOWRX signal is extracted from antenna port 2 and output to the High2-RX connector.
[0039] 4-channel: The ULHigh1RX signal is extracted from antenna port 2 and output to the High1-RX connector.
[0040] Channel 5: The DLRXLOWTX signal is extracted from antenna port 2 and output to the TX LOW connector.
[0041] Channel 6: The High2-TX signal from channel DLHeigh2 is extracted from antenna port 2 and output to the High2-TX connector.
[0042] Channel 7: The DLHeigh1TX signal is extracted from antenna port 2 and output to the High1-TX connector.
[0043] 8-channel: The RXLOWTX signal is extracted from antenna port 2, goes to the SMA connector, connects to an external jumper, goes back to the SMA connector, and then goes to the TXLOW connector for output via a straight-through cable.
[0044] In summary, this technical solution has the following advantages: 1. Increased number of filter channels: With an 8-channel filter design, the number of filter channels is increased to 16, enabling it to be used more extensively in multi-channel communication environments.
[0045] 2. Improved out-of-band suppression: The multi-path coupling design effectively improves the filter's ability to suppress out-of-band interference signals, increases the flexibility of design and development, makes the arrangement space more compact, saves the arrangement projection area, and makes the cavity smaller.
[0046] 3. Reduced size: Through the design and arrangement of dual-layer filters, the overall size of the multiplexer is significantly reduced, making it easier to integrate into miniaturized communication devices.
[0047] 4. Flexible tuning: The design of the tuning screw allows the filter frequency to be flexibly adjusted according to passband requirements.
[0048] 5. The embedded duplexer enables more communication functions, reduces communication space, and effectively reduces the cost of communication solutions. 6. The three-cavity transition filter and the straight-through design effectively connect the RXLOW parts, ensuring signal passage and enabling the solution to be implemented.
[0049] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A multiplexer, characterized in that, include: A cavity, wherein a first intermediate frequency passband, a second intermediate frequency passband, a first low frequency passband, and a second low frequency passband are provided; The cavity adopts a double-layer cavity structure, including a front layer and a back layer; The receiving and transmitting channels of the first and second intermediate frequency passbands are arranged asymmetrically on the front layer of the cavity. The receiving and transmitting channels of the first low-frequency passband and the second low-frequency passband are arranged symmetrically on the back layer of the cavity.
2. The multiplexer according to claim 1, characterized in that, The receiving and transmitting channels of the first intermediate frequency passband and the second intermediate frequency passband, as well as the receiving and transmitting channels of the first low frequency passband and the second low frequency passband, are all composed of multiple resonant cavities arranged in different structural shapes.
3. The multiplexer according to claim 2, characterized in that, Each resonant cavity is equipped with a tuned resonator, and a tuning screw is located above the center of the tuned resonator.
4. The multiplexer according to claim 2, characterized in that, Multiple resonant cavities are arranged in a triangular, cross, or star shape.
5. The multiplexer according to claim 2, characterized in that, The transmission channels of the first intermediate frequency passband and the second intermediate frequency passband include 9-cavity filters; The transmission channels of the first low-frequency passband and the second low-frequency passband include a 3-cavity filter and a 9-cavity filter.
6. The multiplexer according to claim 1, characterized in that, The transmission channels of the first low-frequency passband and the second low-frequency passband are connected by an embedded duplexer and then connected to an SMA connector.
7. The multiplexer according to claim 1, characterized in that, The receiving and transmitting channels of the first intermediate frequency passband and the second intermediate frequency passband, as well as the receiving and transmitting channels of the first low frequency passband and the second low frequency passband, are all connected to the antenna port; The antenna port is designed with a window, and the antenna is coupled above the window to extract signals.