Broadband combiner
By optimizing the broadband combiner using a common resonant cavity coupling structure and phase compensation technology, the problems of narrow bandwidth, high loss, and insufficient isolation are solved, achieving efficient combining of broadband signals and good heat dissipation.
Patent Information
- Application Number
- CN202423124359.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing combiners have narrow bandwidth, high signal loss, and insufficient isolation when processing broadband signals, which limits the performance of communication systems.
A resonant cavity coupling structure is adopted, combined with a feedthrough capacitor and inductor method, and a distributed coupling line segment and phase compensation technology are designed to optimize the coupling structure of the three channels and utilize the conductive heat dissipation performance of the aluminum alloy cavity.
It achieves efficient signal combining over a wide frequency range, reduces mutual interference between channels, improves signal quality, and has good conductivity and heat dissipation performance.
Smart Images
Figure CN223612660U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a broadband combiner. BACKGROUND
[0002] In the base station, different communication systems (like 2G, 3G, 4G or signals of different operators) work in different frequency bands, and the combiner can integrate these signals of different frequency bands and transmit them by using the same set of antenna feeder system, so that the number of antennas can be reduced, the cost can be reduced, and the layout of the base station can be more reasonable. In modern communication systems, in order to meet the transmission requirements of multi-band signals, the application of broadband combiner is increasingly widespread. However, the existing combiner often has problems such as narrow frequency band, large signal loss, insufficient isolation, etc. when processing broadband signals, which limits the performance of the communication system. In order to adapt to the needs of the integration of various communication standards and frequency bands, the signal loss can be effectively reduced. SUMMARY
[0003] In order to solve the defects of the prior art, the utility model provides a broadband combiner, which comprises: a cavity, a cover plate arranged at the top of the cavity, a plurality of input ends arranged at one end of the cavity, and an output end arranged at one end of the cavity.
[0004] The output end is connected with three channels inside the cavity: a first channel, a second channel and a third channel.
[0005] The plurality of input ends comprise: a first input end connected with the first channel through a transmission rod, a second input end connected with the second channel through a transmission rod, and a third input end connected with the third channel through a transmission rod.
[0006] In the three channels, a resonant cavity coupling is used, and the coupling can adopt a through-hole capacitor plus inductor mode. In this way, the total time delay of the combiner can be enhanced, and the mutual influence of other channels can be reduced.
[0007] The first channel is 3400Mhz-36000Mhz; the second channel is 698Mhz-960Mhz; and the third channel is 1710Mhz-2700Mhz.
[0008] The common cavity tap of the three channels is located inside the cavity, which is the core part of realizing broadband combination.
[0009] Preferably, the coupling structure of the common cavity tap is a distributed coupling structure composed of a plurality of coupling line segments. By reasonably designing the length, spacing and characteristic impedance of the coupling line segments, efficient combination of signals of different frequency bands in a wide frequency range can be realized. During the combination process, phase compensation technology can be used to adjust the phase and quarter wavelength of each frequency band signal appropriately to ensure the signal quality after combination.
[0010] Preferably, the first channel is located at a first stage of the tap-coupling structure.
[0011] Preferably, the second channel is located at a third stage of the tap-coupling structure.
[0012] Preferably, the third channel is located at a second stage of the tap-coupling structure.
[0013] Preferably, a metal resonance rod is arranged in the second channel.
[0014] Preferably, the cavity is an aluminum alloy cavity with good electric conduction and heat dissipation performance.
[0015] The wideband combiner has the advantages and beneficial effects that: the wideband combiner can strengthen the total time delay of the combiner and reduce mutual influence on other channels; the wideband combiner can also realize efficient combination of different frequency band signals in a wideband range; and the wideband combiner has good electric conduction and heat dissipation performance. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic view of the utility model. DETAILED DESCRIPTION
[0017] The utility model is further described in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.
[0018] The technical scheme of the utility model is as follows:
[0019] As Figure 1 shown, a wideband combiner comprises: a cavity 1, a cover plate arranged at the top of the cavity 1, a plurality of input ends (21, 22, 23) arranged at one end of the cavity 1, and an output end 3 arranged at one end of the cavity 1.
[0020] The output end 3 is connected with three channels in the cavity 1: a first channel L1, a second channel L2, and a third channel L3.
[0021] The plurality of input ends 2 comprise: a first input end 21 connected with the first channel L1 through a transmission rod 4, a second input end 22 connected with the second channel L2 through the transmission rod 4, and a third input end 23 connected with the third channel L3 through the transmission rod 4.
[0022] The three channels use a common resonance cavity coupling, and the coupling can adopt a through-hole capacitor plus inductor mode; in this way, the total time delay of the combiner can be strengthened, and mutual influence on other channels can be reduced.
[0023] The first channel L1 is 3400-36000 Mhz; the second channel L2 is 698-960 Mhz; and the third channel L3 is 1710-2700 Mhz.
[0024] The common-cavity tap of the three-channel is located inside the cavity 1, which is the core part of realizing the wide-band combining;
[0025] The coupling structure of the common-cavity tap is a distributed coupling structure, which is composed of multiple coupling line segments. By reasonably designing the length, spacing and characteristic impedance of the coupling line segments, efficient combining of signals of different frequency bands in a wide frequency range can be realized. During the combining process, the phase compensation technology can be used to adjust the phase and quarter wavelength of each frequency band signal appropriately to ensure the signal quality after combining.
[0026] The first channel L1 is located at the first stage of the tap coupling structure; the second channel L2 is located at the third stage of the tap coupling structure; and the third channel L3 is located at the second stage of the tap coupling structure.
[0027] A metal resonance rod 5 is arranged in the second channel.
[0028] The cavity 1 is an aluminum alloy cavity, which has good electric conduction and heat dissipation performance.
[0029] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.
Claims
1. A wideband combiner comprising: A cavity, a cover plate arranged at the top of the cavity, a plurality of input ends arranged at one end of the cavity, and an output end arranged at the other end of the cavity; characterized in that: The output end is connected with three channels inside the cavity: a first channel, a second channel, and a third channel; The plurality of input ends include: a first input end connected with the first channel through a transmission rod, a second input end connected with the second channel through a transmission rod, and a third input end connected with the third channel through a transmission rod; A common resonant cavity is used in the three channels.
2. The wideband combiner of claim 1, wherein, The first channel is 3400Mhz-36000Mhz; the second channel is 698Mhz-960Mhz; and the third channel is 1710Mhz-2700Mhz.
3. The wideband combiner of claim 1, wherein, The common cavity tap of the three channels is inside the cavity.
4. The wideband combiner of claim 3, wherein, The coupling structure of the common cavity tap is a distributed coupling structure.
5. The wideband combiner of claim 1, wherein, The first channel is at the first stage of the tap coupling structure.
6. The wideband combiner of claim 1, wherein, The second channel is at the third stage of the tap coupling structure.
7. The wideband combiner of claim 1, wherein, The third channel is at the second stage of the tap coupling structure.
8. The wideband combiner of claim 1, wherein, A metal resonant rod is arranged in the second channel.
9. The wideband combiner of claim 1, wherein, The cavity is an aluminum alloy cavity.