WO2021093456A1

WO2021093456A1 - Combiner

Info

Publication number: WO2021093456A1
Application number: PCT/CN2020/116090
Authority: WO
Inventors: 陀思勇; 陈安; 陈凯; 孟弼慧; 陈嘉元
Original assignee: 京信通信技术(广州)有限公司
Priority date: 2019-11-13
Filing date: 2020-09-18
Publication date: 2021-05-20
Also published as: CN110828952A

Abstract

The present invention provides a combiner, comprising a cavity body having a cavity, and a common joint provided on one end of the cavity. One side in the cavity close to the common joint is provided with a first frequency resonance column, a second frequency resonance column, a third frequency resonance column, and a coupling rod connected to the common joint; a metal sleeve in coupling connection with the coupling rod is sleeved on the coupling rod; the first frequency resonance column is connected to the metal sleeve by means of a conductive wire so as to transmit a first frequency band signal; the second frequency resonance column is provided with a coupling hole through which the coupling rod is inserted and coupled, so as to achieve the transmission of a second frequency band signal; the third frequency resonance column is provided at one side of the coupling rod and is in coupling connection with the coupling rod, so as to transmit a third frequency band signal. By providing the coupling rod at the common joint to respectively perform bandwidth coupling and allocation on the first frequency resonance column, the second frequency resonance column, and the third frequency resonance column, the present invention achieves the splitting/combining of multi-band signals integrated with a 5G frequency band, and compared with the port structure of a traditional combiner, is simple in structure and can satisfy the development of a 5G communication technology.

Description

Combiner

Technical field

The invention relates to the field of microwave passive devices, in particular to a combiner.

Background technique

With the development of mobile communications, there are more and more communication spectrums, and methods such as multi-system combination, co-construction and sharing have become mainstream solutions for network construction, which has given birth to a large number of applications of multi-frequency combiners. In the 2G/3G/4G era, the communication frequency range includes Band 1 (698MHz-960MHz) and Band 2 (1710MHz-2700MHz). With the advent of the 5G era, 700MHz, 1400MHz, and 3500MHz frequency bands have been added. How to achieve multiple frequency bands , Ultra-wideband frequency band combination is the key to the joint construction of future 5G and existing 2G/3G/4G systems.

Summary of the invention

The purpose of the present invention is to provide a combiner that integrates 5G frequency band multi-band signal splitting/combining.

In order to achieve the above objectives, the present invention provides the following technical solutions:

A combiner includes a cavity with a cavity and a common joint at one end of the cavity. A first frequency resonance column and a second frequency resonance are arranged in the cavity on the side close to the common joint. A column, a third frequency resonance column and a coupling rod connected to the common joint, the coupling rod is sheathed with a metal sleeve coupled to the coupling rod, and the first frequency resonance column is connected to the metal sleeve through a wire for transmission For the first frequency band signal, the second frequency resonant column is provided with a coupling hole, and the coupling rod is inserted in the coupling hole and coupled to the second resonant column to realize the transmission of the second frequency band signal. The third frequency resonance column is arranged on one side of the coupling rod and is coupled to the coupling rod to transmit a third frequency band signal.

Further settings: the first frequency band includes 698MHz-960MHz, the second frequency band includes 1400MHz-2700MHz, and the third frequency band includes 3300MHz-3800MHz.

Further arrangement: a dielectric ring for separating the two is provided between the coupling rod and the metal sleeve.

It is further provided that the outer wall of the coupling rod is provided with a limiting groove for accommodating the medium ring.

It is further provided that the cavity is provided with an opening penetrating to the common joint and for inserting the coupling rod, and the coupling rod is provided with a medium support extending in the radial direction of the coupling rod and abutting against the inner wall of the opening. Piece.

It is further provided that the end of the coupling rod inserted into the coupling hole is sleeved with an insulating dielectric member that is against the wall of the coupling hole.

It is further provided that the coupling area and distance between the third frequency resonance column and the coupling rod are limited to be related to the third frequency band bandwidth transmitted by the third frequency resonance column.

It is further provided that a wave trap is further provided in the cavity, and the wave trap is connected to the coupling rod through an inductor.

It is further provided that a lightning protection circuit board is arranged outside the cavity, and the inner core of the wave trap is connected to the lightning protection circuit board.

It is further provided that at least three resonant cavities are provided in the cavity corresponding to the first frequency resonant column, the second frequency resonant column and the third frequency resonant column, and the cavity is away from the common joint A single signal connector corresponding to the resonant cavity is provided on one side.

Compared with the prior art, the solution of the present invention has the following advantages:

1. In the combiner of the present invention, by setting the coupling rods at the common joints to perform bandwidth coupling distribution with the first frequency resonant column, the second frequency resonant column, and the third frequency resonant column respectively, so as to realize the first frequency and the second frequency. Dividing/combining the three frequency bands of the second frequency band and the third frequency band, the relative bandwidth of the signal single connector can reach 63.4%, and it covers the new 5G frequency band, adapting to the development of 5G communication technology, and can realize multi-band, ultra-wideband The frequency band is divided/combined in order to achieve the co-construction of the 5G system and the existing 2G/3G/4G system. At the same time, the hierarchical coupling technology port structure is adopted in the combiner. In addition to meeting the total bandwidth demand, there is no bandwidth between each channel. The interference or interference is small, which can reduce the situation that causes uneven bandwidth allocation.

2. In the combiner of the present invention, the bandwidth coupling between the coupling rod and the first frequency resonant column, the second frequency resonant column, and the third frequency resonant column are all capacitive couplings, so that the combination can be realized by the trap and the inductor. The DC path of the circuit device, and a lightning protection circuit board is arranged outside the cavity for lightning protection function, and then plays the role of protecting the combiner.

The additional aspects and advantages of the present invention will be partially given in the following description, which will become obvious from the following description, or be understood through the practice of the present invention.

Description of the drawings

The above and/or additional aspects and advantages of the present invention will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

Figure 1 is a schematic structural diagram of an embodiment of the combiner of the present invention;

Figure 2 is a side cross-sectional view of an embodiment of the combiner of the present invention;

Figure 3a is a schematic diagram of the structure of the combiner of the present invention for showing that the cavity is close to the common joint;

Fig. 3b is a schematic diagram showing the structure of the cover plate in the combiner of the present invention;

Fig. 4 is a schematic diagram showing that the first frequency resonant column and the metal sleeve are connected through a wire in the combiner of the present invention.

In the figure, 1. Cavity; 11. Opening; 2. Cover plate; 21. Tuning screw; 3. Common joint; 4. Coupling rod; 41. Metal sleeve; 42. Dielectric ring; 43. Limit groove; 44. Dielectric support block; 45. Dielectric sleeve; 451. Hat; 5. First frequency resonance column; 51. Wire; 6. Second frequency resonance column; 61. Coupling hole; 7. Third frequency resonance column; 8. Trap wave器; 81, inductance; 9, signal single connector.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but cannot be construed as limiting the present invention.

Referring to Figures 1 to 3b, the present invention relates to a combiner, which can realize the division/combination of multiple frequency bands including 698MHz-960MHz, 1400MHz-2700MHz, 3300MHz-3800MHz, or sub-bands included in the above-mentioned frequency range. Among them, 3300MHz-3800MHz and the sub-bands included in the frequency range belong to the 5G frequency band, so that the combiner of the present invention covers the 5G frequency band, adapts to the development of 5G communication technology, and helps the 5G system and the existing 2G/ Co-construction of 3G/4G system.

In addition, it should be noted that in the present invention, the frequency range of 698MHz-960MHz and the sub-bands included in the frequency range are defined as the first frequency band, and the frequency range of 1400MHz-2700MHz and the sub-bands included in the frequency range are defined as the first frequency band. It is the second frequency band, and the frequency range of 3300MHz-3800MHz and the sub-frequency bands included in this frequency band are defined as the third frequency band.

The combiner includes a cavity 1 and a cover plate 2 that cover each other. The cover plate 2 can be fixedly connected to the side wall of the cavity 1 and defines a seal for signal transmission in the cavity 1 Type cavity (not marked in the figure, the same below), one end of the cavity 1 is provided with a common connector 3, and the other end of the cavity 1 opposite to the common connector 3 is provided with a plurality of signals Single connector 9.

A side of the cavity of the cavity 1 close to the common connector 3 is provided with a first frequency resonance column 5, a second frequency resonance column 6, a third frequency resonance column 7 and a coupling connected to the common connector 3 A rod 4, the side wall of the cavity 1 is provided with an opening 11 (ie, a common port) that penetrates to the common joint 3 and is used for the insertion of the coupling rod 4, and one end of the coupling rod 4 is inserted into the opening 11 It is connected to the common joint 3, and the other end thereof extends into the cavity.

In addition, the coupling rod 4 is provided with a dielectric support block 44 extending in its radial direction at its middle portion, and the dielectric support block 44 abuts against the inner wall of the opening 11 to realize the support and fixation of the coupling rod 4 . Specifically, in this embodiment, the coupling rod 4 may be sheathed with a metal sleeve 41 on the side of the dielectric support block 44 away from the common joint 3, and the dielectric support block 44 may act against the metal sleeve 41. To the limit effect. A dielectric ring 42 for separating the coupling rod 4 and the metal sleeve 41 is provided between the coupling rod 4 and the metal sleeve 41 to realize the coupling connection between the coupling rod 4 and the metal sleeve 41. In other embodiments, the media ring 42 and the media support block 44 are integrally formed to simplify assembly.

Preferably, the above-mentioned dielectric support block 44 and the dielectric ring 42 are made of polytetrafluoroethylene, which has excellent electrical insulation properties, good high and low temperature resistance, and sufficiently good mechanical properties and chemical stability.

Further, the outer wall of the coupling rod 4 is provided with a limiting groove 43 for the medium ring 42 to accommodate, so as to restrict the medium ring 42 from moving along the length direction of the coupling rod 4, thereby improving the The coupling between the coupling rod 4 and the metal sleeve 41 is stable.

The metal sleeve 41 is sleeved on the coupling rod 4 at a position corresponding to the common port in the cavity 1, the first frequency resonance rod 5 is provided on one side of the coupling rod 4, and the first frequency resonance rod 5 passes The wire 51 is connected to the metal sleeve 41 to realize the port bandwidth allocation of the first frequency band (698MHz-960MHz and the sub-bands included in the frequency band), and the wire 51 can be a silver-plated copper wire. The two ends of the silver copper wire are respectively welded to the first frequency resonance column 5 and the metal sleeve 41, and the diameter of the wire 51 can be adjusted or the welding height of the wire 51 and the first frequency resonance column 5 can be changed. To change the coupling bandwidth of the first frequency resonance column 5. Specifically, referring to FIG. 4, set the welding height of the wire 51 and the first frequency resonance column 5 to H, then H becomes larger, and the coupling bandwidth of the first frequency resonance column 5 becomes larger, and vice versa; At the same time, the diameter of the wire 15 becomes thicker, and the coupling bandwidth of the first frequency resonance column 5 becomes larger, and vice versa.

The second frequency resonance column 6 is arranged at an end of the coupling rod 4 opposite to the common port, and the second frequency resonance column 6 is provided with a coupling hole 61 penetrating the second frequency resonance column 6, and the coupling The end of the rod 4 away from the common connector 3 is inserted into the coupling hole 61 and the second frequency resonance column 6 is coupled to the coupling rod 4, thereby realizing the second frequency band (1400MHz-2700MHz and included in the The sub-band within the frequency band) port bandwidth allocation. In addition, the coupling bandwidth of the second frequency resonance column 6 can also be adjusted by adjusting the depth of the coupling rod 4 inserted into the coupling hole 61.

The end of the coupling rod 4 inserted into the coupling hole 61 is sleeved with a dielectric sleeve 45 for separating the coupling rod 4 from the coupling hole 61, which prevents short circuits, and the dielectric sleeve 45 A brim 451 is formed at the end where the coupling rod 4 is inserted. The brim 451 is located between the coupling rod 4 and the second frequency resonance column 6 to avoid the size change of the coupling rod 4 When the coupling rod 4 is inserted into the coupling hole 61, the coupling rod 4 is in contact with the second frequency resonance column 6, which further improves the coupling between the coupling rod 4 and the second frequency resonance column 6 The stability. The dielectric sleeve 45 can be made of common insulating materials, and specifically preferably made of polytetrafluoroethylene dielectric.

The third frequency resonance column 7 is arranged on the side of the coupling rod 4 opposite to the first frequency resonance column 5, and the outer side wall of the third frequency resonance column 7 is spaced from the coupling rod 4, so that The third frequency resonance rod 7 is directly coupled with the coupling rod 4 to realize the port bandwidth allocation of the third frequency band (3300MHz-3800MHz and the sub-bands included in the frequency range).

The position setting of the first frequency resonant column 5, the second frequency resonant column 6, and the third frequency resonant column 7 and the specific setting of the coupling mode can avoid interference between various frequency bands and improve the isolation.

Further, the side of the third frequency resonance column 7 close to the coupling rod 4 is set as a plane, so as to enhance the coupling bandwidth. In addition, the coupling bandwidth of the third frequency resonance column 7 can also be adjusted by adjusting the coupling area and distance between the third frequency resonance column 7 and the coupling rod 4. The third frequency resonance column 7 and the coupling rod 4 are capacitively coupled, which is easy to adjust. It can be easily adjusted by changing the coupling area and distance between the third frequency resonance column 7 and the coupling rod 4 To achieve the purpose of adjusting the size of the coupling bandwidth, while also reducing the use of installation parts to reduce passive intermodulation.

The coupling rod 4 in the present invention is first connected to the first frequency resonant column 5 through the metal sleeve 41 coupled thereto, so as to realize the signal transmission of the first frequency band (698MHz-960MHz and the sub-frequency band included in the frequency band); Subsequently, the third frequency resonance column 7 is located on the side of the metal sleeve 51 close to the coupling rod 4 and is coupled with the coupling rod 4 to realize the third frequency band (3300MHz-3800MHz and included in the frequency range) The end of the coupling rod 4 is inserted into the coupling hole 61 to couple with the second frequency resonant column 6 to realize the second frequency band (1400MHz-2700MHz and included in the frequency range). Sub-band) signal transmission, that is, the present invention first transmits low-frequency signals along the end of the coupling rod 4 and the common connector 3 toward the end, and then transmits high-frequency signals, and finally Realize the transmission of mid-band signals located between the low frequency band and the high frequency band, thereby avoiding mutual interference between the first frequency band, the second frequency band, and the third frequency band, especially the interference of the high frequency band to the medium and low frequency band signals. It is beneficial to improve the isolation of the combiner port.

1 and 3a, the cavity is also provided with a wave trap 8. The wave trap 8 is connected to the coupling rod 4 through an inductor 81, so that the input to the coupling through the common connector 3 The DC signal of the rod 4 is transmitted through the trap 8, and the bandwidth coupling of the coupling rod 4 and the first frequency resonant column 5, the second frequency resonant column 6 and the third frequency resonant column 7 in the present invention are all capacitive. The coupling can avoid the grounding of the coupling rod 4 due to the direct connection of the frequency resonance column and the coupling rod 4, thereby ensuring the DC transmission performance of the combiner.

The cavity 1 is also provided with a lightning protection circuit board (not shown in the figure, the same below), and the inner core of the wave trap 8 is connected with the lightning protection circuit board to realize the protection of the combiner. Thunder function.

In addition, in this embodiment, the combiner of the present invention is provided with at least three resonant cavities corresponding to the first frequency resonant column 5, the second frequency resonant column 6 and the third frequency resonant column 7 (not marked in the figure, the same below ), the resonant cavity is composed of the cavity 1, the cover plate 2 and the corresponding frequency resonant column, and the signal single connector 9 is provided with at least three and is arranged one by one corresponding to each resonant cavity.

1 and 3a, the cover plate 2 is provided with a tuning screw 21 corresponding to the frequency resonance column in the cavity, and the tuning screw 21 is threadedly connected to the cover plate 2 to screw the tuning screw 21 Adjust its length in the cavity to adjust the resonant frequency of the resonant cavity.

In the combiner of the present invention, the first frequency (698MHz-960MHz and the sub-bands included in the frequency range) and the second frequency band are realized by setting a three-level ultra-wideband composite wide-port structure at the public connector 3 (1400MHz-2700MHz and the sub-bands included in the frequency range) and the third frequency band (3300MHz-3800MHz and the sub-bands included in the frequency range) of the three frequency division/combination, the relative signal of the single connector 9 The bandwidth can reach 63.4%, and it covers the new 5G frequency band, which is suitable for the development of 5G communication technology. It can realize multi-band and ultra-wideband frequency division/combination to achieve the commonality of the 5G system and the existing 2G/3G/4G system. At the same time, the said combiner adopts a hierarchical coupling technology port structure. In addition to meeting the total bandwidth requirement, there is no interference or small interference between the broadband of each channel, which is beneficial to improve the isolation of the combiner port, which can Reduce the situation that causes uneven bandwidth allocation.

In addition, in the combiner, the metal sleeve 41 corresponding to the first frequency band path and the first frequency resonant column 5 can be welded through the wire 51 in advance, and electroplated and then assembled, reducing the solder joints of the port structure. , So that the only place that needs welding in the entire port structure is the welding between the inductance 81 and the coupling rod 4. The structure of the common joint 3 on the entire coupling rod 4 has fewer welding points, which can achieve lower The level of passive intermodulation.

The above are only part of the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

Claims

A combiner, comprising a cavity with a cavity and a common joint arranged at one end of the cavity, characterized in that: a first frequency resonance column is arranged in the cavity on the side close to the common joint, The second frequency resonant column, the third frequency resonant column and the coupling rod connected to the common joint are sheathed with a metal sleeve coupled to the coupling rod, and the first frequency resonant column is connected to the metal through a wire. The sleeve is connected to transmit the first frequency band signal, the second frequency resonance column is provided with a coupling hole, and the coupling rod is inserted in the coupling hole and coupled to the second resonance column to realize the second frequency band signal For transmission, the third frequency resonance column is arranged on one side of the coupling rod and is coupled to the coupling rod to transmit a third frequency band signal.
The combiner according to claim 1, wherein the first frequency band includes 698MHz-960MHz, the second frequency band includes 1400MHz-2700MHz, and the third frequency band includes 3300MHz-3800MHz.
The combiner according to claim 1, wherein a dielectric ring for separating the two is provided between the coupling rod and the metal sleeve.
The combiner according to claim 3, wherein the outer wall of the coupling rod is provided with a limiting groove for accommodating the medium ring.
The combiner according to claim 1 or 3, characterized in that: the cavity is provided with an opening that penetrates the common joint and is inserted into the coupling rod, and the coupling rod is provided with an opening along the A medium supporting block extending radially and abutting against the inner wall of the opening.
The combiner according to claim 1, characterized in that: the end of the coupling rod inserted into the coupling hole is sleeved with an insulating dielectric member that abuts against the wall of the coupling hole.
The combiner according to claim 1, wherein the coupling area and distance between the third frequency resonance column and the coupling rod are limited to the third frequency band bandwidth transmitted by the third frequency resonance column Related.
The combiner according to claim 1, characterized in that: a wave trap is further provided in the cavity, and the wave trap is connected to the coupling rod through an inductance.
8. The combiner according to claim 8, wherein a lightning protection circuit board is provided outside the cavity, and the inner core of the wave trap is connected to the lightning protection circuit board.
The combiner according to claim 1, wherein the cavity is provided with at least three resonant cavities corresponding to the first frequency resonant column, the second frequency resonant column and the third frequency resonant column And a single signal connector corresponding to the resonant cavity is provided on the side of the cavity away from the common connector.