CN213401464U

CN213401464U - Filter and communication base station

Info

Publication number: CN213401464U
Application number: CN202021414069.6U
Authority: CN
Inventors: 童恩东; 张海峰; 温世议; 蔡永宏
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-06-08
Anticipated expiration: 2030-07-17

Abstract

The utility model relates to a wave filter and communication base station, including cavity (1), the middle part of this cavity (1) is provided with ANT port (19), both ends set up TX port (18) and RX port (17) respectively, the relative both sides surface of wave filter is provided with signal transmission passageway (16) and signal reception passageway (15) all the way respectively, signal transmission passageway (16) of both sides surface all include a plurality of TX resonant cavities, signal reception passageway (15) of both sides surface all include a plurality of RX resonant cavities; all TX resonant cavities (161) and RX resonant cavities (151) are arranged in two rows, the TX resonant cavities of the first row are adjacently staggered with the TX resonant cavities of the second row, and the RX resonant cavities of the first row are adjacently staggered with the RX resonant cavities of the second row; and the signal transmitting channel and the signal receiving channel (15) on two sides of the cavity share one ANT port (19). The utility model discloses the wave filter has rational in infrastructure, the overall arrangement is compact, the size is little and the loss low grade advantage.

Description

Filter and communication base station

[ technical field ] A method for producing a semiconductor device

The utility model relates to the field of communication technology, especially, relate to microwave communication, especially, relate to cavity filter.

[ background of the invention ]

The cavity filter is a passive device, is one of core devices of the radio frequency unit, and has the functions of eliminating interference clutter, enabling useful signals to pass through without attenuation as much as possible, attenuating useless signals as much as possible to filter the useless interference signals, ensuring that the signals in a working frequency range normally work, and passing through with the minimum loss.

With the increasing development of wireless communication technology, the size of a base station is required to be miniaturized, and the size occupied by a filter in the base station is also required to be miniaturized.

The cavity filter in the prior art is designed according to the shape of a cavity body and the position of a port of the filter required by a client, and the cavity arrangement mode is not compact and messy, and does not meet the design requirements of small volume, light weight and the like required by the increasingly developed wireless communication technology; in addition, in the cavity filter in the prior art, multiple channels with different layouts are fixedly arranged and only adapted to a communication base station matched with the cavity filter, so that the universality is poor.

In the prior art, an RX port (receiving port) of a cavity filter is generally far away from the edge of a cavity of the filter, and needs to be connected by a cable, so that the signal transmission loss is large, the performance of a base station antenna system is low, and the performance of the whole base station is affected; in addition, the topological structures of all the adjusting channels of the cavity filter in the prior art are inconsistent, so that the testing modes of all the adjusting channels are different, and great troubles are brought to a debugger.

[ Utility model ] content

The to-be-solved technical problem of the utility model lies in avoiding the weak point of above-mentioned prior art and providing a wave filter, have rational in infrastructure, overall arrangement compactness, small in size and loss advantage such as low.

The utility model provides a technical scheme that technical problem adopted is:

providing a filter, which comprises a cavity, wherein an ANT port is arranged in the middle of the cavity, a TX port and an RX port are respectively arranged at two ends of the cavity, a signal sending channel and a signal receiving channel are respectively arranged on two opposite side surfaces of the filter, the signal sending channels on the two side surfaces comprise a plurality of TX resonant cavities, and the signal receiving channels on the two side surfaces comprise a plurality of RX resonant cavities; all the TX resonant cavities and the RX resonant cavities are arranged into two rows, the TX resonant cavities of the first row are adjacently staggered with the TX resonant cavities of the second row, and the RX resonant cavities of the first row are adjacently staggered with the RX resonant cavities of the second row; and the signal transmitting channel and the signal receiving channel on two sides of the cavity share one ANT port.

Further:

the TX ports and two rows of adjacent TX resonant cavities are arranged in a tangent mode; the RX ports and the two adjacent rows of RX resonant cavities are arranged in a tangent mode, the resonant cavities in the first row and the resonant cavities in the second row are arranged in a tangent mode, and the resonant cavities in each row are arranged in a tangent mode.

The passband of a signal transmitting channel is positioned in the range of 1830MHz-1880MHz, the signal transmitting channel comprises ten TX resonant cavities and a common resonant cavity, and the TX port, the second TX resonant cavity, the fourth TX resonant cavity, the sixth TX resonant cavity, the eighth TX resonant cavity, the tenth TX resonant cavity and the common resonant cavity are sequentially arranged in a row; the first TX resonant cavity, the third TX resonant cavity, the fifth TX resonant cavity, the seventh TX resonant cavity, the ninth TX resonant cavity and the ANT port are sequentially arranged in the other row which is arranged in parallel.

Windows are arranged between the first TX resonant cavity and the third TX resonant cavity, between the fifth TX resonant cavity and the seventh TX resonant cavity, between the seventh TX resonant cavity and between the ninth TX resonant cavity, and capacitive cross coupling elements are arranged between the third TX resonant cavity and between the fifth TX resonant cavity.

The passband of the signal receiving channel on one side surface is within the range of 1735MHz-1785MHz, the signal receiving channel comprises seven RX resonant cavities and a shared resonant cavity, and the ANT port, the first RX resonant cavity, the third RX resonant cavity, the fifth RX resonant cavity and the seventh RX resonant cavity are sequentially arranged in a row; the shared resonant cavity, the second RX resonant cavity, the fourth RX resonant cavity, the sixth RX resonant cavity and the RX port are sequentially arranged in the other row which is arranged in parallel.

And windows are arranged between the first RX resonant cavity and the third RX resonant cavity and between the third RX resonant cavity and the fifth RX resonant cavity.

The passband of the signal receiving channel on the surface of one side of the cavity is within the range of 1735MHz-1785MHz, the signal receiving channel sequentially passes through the ANT port, the seven RX resonant cavities and a common resonant cavity, wherein the ANT port, the first RX resonant cavity, the third RX resonant cavity, the fifth RX resonant cavity and the sixth RX resonant cavity are sequentially arranged in a row; the shared resonant cavity, the second RX resonant cavity, the fourth RX resonant cavity, the seventh RX resonant cavity and the RX port are sequentially arranged in the other row which is arranged in parallel.

The passband of a signal transmission channel on the other side surface of the cavity is within the range of 2110MHz-2165MHz, the part of the other side surface of the cavity between the TX port and the ANT port comprises eight TX resonant cavities, a spare resonant cavity and a common resonant cavity, and the TX port, the second TX resonant cavity, the fourth TX resonant cavity, the sixth TX resonant cavity, the eighth TX resonant cavity and the common resonant cavity are sequentially arranged in a row; the first TX resonant cavity, the third TX resonant cavity, the fifth TX resonant cavity, the seventh TX resonant cavity, the standby resonant cavity and the ANT port are sequentially arranged in the other row which is arranged in parallel.

And windows are arranged between the second TX resonant cavity and the fourth TX resonant cavity and between the fifth TX resonant cavity and the seventh TX resonant cavity.

The passband of a signal receiving channel on the other side surface of the cavity is within a range of 1920MHz-1975MHz, the signal receiving channel comprises eight RX resonant cavities and a common resonant cavity, the ANT port, the second RX resonant cavity, the fourth RX resonant cavity, the sixth RX resonant cavity and the eighth RX resonant cavity are sequentially arranged in one row, and the common resonant cavity, the first RX resonant cavity, the third RX resonant cavity, the fifth RX resonant cavity, the seventh RX resonant cavity and the RX port are sequentially arranged in the other row which is arranged in parallel.

Capacitive cross-coupling elements are arranged between the third RX resonant cavity and the fifth RX resonant cavity and between the fifth RX resonant cavity and the seventh RX resonant cavity.

There is provided a communications base station comprising a filter as described above.

Compared with the prior art, the utility model discloses the beneficial effect of wave filter lies in:

arranging TX resonant cavities and RX resonant cavities into two rows together, wherein the TX resonant cavities of each row are arranged adjacently in sequence, the RX resonant cavities of each row are arranged adjacently in sequence, the TX resonant cavities of one row are arranged adjacently and crossly with the TX resonant cavities of the other row, and the RX resonant cavities of one row are also arranged adjacently and crossly with the RX resonant cavities of the other row; with such a layout of the array of cavities, it is obvious that the layout of the resonant cavities is compact, and when the layout of the resonant cavities, and the ANT port, the TX port, and the RX port are determined, the size of the whole cavity is defined, so that the size of the whole cavity can be reduced. And because the layout of each resonant cavity is compact, each signal transmission link is shortened in turn, and the loss is correspondingly reduced.

The TX port and the RX port are designed to be respectively positioned at two ends of the TX signal channel and the RX signal channel, the ANT port is arranged between the TX resonant cavity and the RX resonant cavity in one row, cable connection is not needed between the RX port and the RX signal channel, cable connection is not needed between the TX port and the TX signal channel, loss is reduced to be lower, a transmission link between the ANT port and the RX signal channel and between the ANT port and the TX signal channel is shortened, and loss is further reduced.

And three, particularly, the adjacent resonant cavities are arranged in a tangent mode, so that the layout is more compact, the size is smaller, and the loss is lower.

[ description of the drawings ]

Fig. 1 is a schematic front view of a row cavity layout of an embodiment of the filter of the present invention, showing a signal transmission link;

figure 2 is a schematic back view of a row cavity layout of an embodiment of the filter of the present invention;

fig. 3 is a schematic perspective view of an embodiment of the filter of the present invention;

fig. 4 is a schematic front view of a cavity layout of an embodiment of the filter of the present invention, showing another transmission path of a signal receiving channel.

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings.

A filter, as shown in fig. 1 to 3, includes a cavity 1, and an ANT port 19 is provided in the middle of the cavity 1, and a TX port 18 and an RX port 17 are provided at both ends of the cavity. Two opposite side surfaces of the cavity 1 are symmetrically provided with a signal sending channel 16 and a signal receiving channel 15 respectively. The signal transmitting channels 16 each include a plurality of TX resonators, and the signal receiving channels 15 on both side surfaces each include a plurality of RX resonators; all the TX resonant cavities 161 and RX resonant cavities 151 are arranged in two rows, the TX resonant cavities of the first row are arranged adjacent to the TX resonant cavities of the second row in a staggered manner, and the RX resonant cavities of the first row are arranged adjacent to the RX resonant cavities of the second row in a staggered manner; the signal transmitting path and the signal receiving path 15 at both sides of the chamber share one ANT port 19.

Preferably, the TX ports 18 are arranged tangentially to both rows of adjacent TX resonators 161; the RX ports 17 are arranged tangentially to two adjacent rows of RX resonators 151, the resonators in the first row are arranged tangentially to the resonators in the second row, and the resonators in each adjacent row are arranged tangentially.

As shown in fig. 1 and 3, the pass band of the signal transmission channel 181 on one side surface of the cavity 1, i.e., the front surface of the cavity, is located in the range of 1830MHz-1880MHz, and the signal transmission channel 181 includes ten TX resonators 161 and a common resonator 11, wherein the TX port 18, the second TX resonator TX2, the fourth TX resonator TX4, the sixth TX resonator TX6, the eighth TX resonator TX8, and the tenth TX resonator TX10 and the common resonator are sequentially arranged in a row; the first TX resonant cavity TX1, the third TX resonant cavity TX3, the fifth TX resonant cavity TX5, the seventh TX resonant cavity TX7, the ninth TX resonant cavity TX9 and the ANT port 19 are arranged in sequence in the other row which is arranged in parallel. Signals are input from the TX port 18 and output from the ANT port 19 sequentially through the first TX resonant cavity TX1, the second TX resonant cavity TX2, the third TX resonant cavity TX3, the fourth TX resonant cavity TX4, the fifth TX resonant cavity TX5, the sixth TX resonant cavity TX6, the seventh TX resonant cavity TX7, the eighth TX resonant cavity TX8, the ninth TX resonant cavity TX9, the tenth TX resonant cavity TX10 and the common resonant cavity 11.

Windows 12 are arranged between the first TX resonant cavity TX1 and the third TX resonant cavity TX3, between the fifth TX resonant cavity TX5 and the seventh TX resonant cavity TX7, between the seventh TX resonant cavity TX7 and between the ninth TX resonant cavity TX9 to realize inductive coupling, and capacitive cross-coupling elements 13 are arranged between the third TX resonant cavity TX3 and between the fifth TX resonant cavity TX 5.

The passband of the signal reception channels on the front of the cavity is in the 1735MHz-1785MHz range, and the signal reception channels 171 comprise seven RX resonators 151 and one common resonator 11. The ANT port 19, the first RX resonant cavity RX1, the third RX resonant cavity RX3, the fifth RX resonant cavity RX5 and the seventh RX resonant cavity RX7 are sequentially arranged in a row; the common resonator 11, the second RX resonator RX2, the fourth RX resonator RX4, the sixth RX resonator RX6 and the RX port 17 are arranged in sequence in another row of parallel rows. The signal from the ANT port 19 is received via the RX port 17 via the common resonator 11, the first RX resonator RX1, the second RX resonator RX2, the third RX resonator RX3, the fourth RX resonator RX4, the fifth RX resonator RX5, the sixth RX resonator RX6 and the seventh RX resonator RX7 in that order. Windows 12 are provided between the first RX cavity RX1 and the third RX cavity RX3, and between the third RX cavity RX3 and the fifth RX cavity RX5 to achieve inductive coupling.

Another embodiment of the cavity arrangement on one side surface of the cavity is shown in fig. 4, where the passband of the signal receiving channel 171 is in the 1735MHz-1785MHz range, and includes seven RX resonant cavities 151 and a common resonant cavity. The ANT port 19, the first RX resonant cavity RX1, the third RX resonant cavity RX3, the fifth RX resonant cavity RX5 and the sixth RX resonant cavity RX6 are sequentially arranged in a row; the common resonator 11, the second RX resonator RX2, the fourth RX resonator RX4, the seventh RX resonator RX7 and the RX port 17 are arranged in sequence in another row of parallel rows. This embodiment is the same as the resonator arrangement of the embodiment shown in fig. 1, except that the transmission path of the signal receiving channel 171 is different.

Fig. 2 is a schematic diagram showing the arrangement of the resonators on the other side of the cavity, i.e., the back side of the cavity, the passband of the signal transmission channel 181 on the other side of the cavity is within the range of 2110MHz to 2165MHz, and the portion of the cavity between the TX port and the ANT port includes eight TX resonators, one spare resonator 14 and one common resonator 11. The TX port 18, the second TX resonant cavity TX12, the fourth TX resonant cavity TX14, the sixth TX resonant cavity TX16, the eighth TX resonant cavity TX18 and the common resonant cavity 11 are sequentially arranged in a row; the first TX resonant cavity TX11, the third TX resonant cavity TX13, the fifth TX resonant cavity TX15, the seventh TX resonant cavity TX17, the spare resonant cavity 14 and the ANT port 19 are sequentially arranged in another row of the parallel rows. Signals are input from the TX port 18, sequentially pass through the first TX resonant cavity TX11, the second TX resonant cavity TX12, the third TX resonant cavity TX13, the fourth TX resonant cavity TX14, the fifth TX resonant cavity TX15, the sixth TX resonant cavity TX16, the seventh TX resonant cavity TX17, the eighth TX resonant cavity TX18 and the common resonant cavity 11 and are output from the ANT port 19. Windows are arranged between the second TX resonant cavity TX12 and the fourth TX resonant cavity TX14, and between the fifth TX resonant cavity TX14 and the seventh TX resonant cavity TX 16.

The passband of the signal receiving channel 171 disposed behind the cavity shown in fig. 2 lies in the range of 1920MHz-1975 MHz. The signal receiving channel comprises eight RX resonant cavities and a shared resonant cavity, wherein the ANT port 19, the second RX resonant cavity RX9, the fourth RX resonant cavity 11, the sixth RX resonant cavity 13 and the eighth RX resonant cavity 15 are sequentially arranged in one row, and the first RX resonant cavity RX8, the third RX resonant cavity RX10, the fifth RX resonant cavity RX12, the seventh RX resonant cavity RX14 and the RX port 17 are sequentially arranged in another row which are arranged in parallel. The signal from the ANT port 19 passes through the common resonator 11, the first RX resonator RX8, the second RX resonator RX9, the third RX resonator RX10, the fourth RX resonator RX11, the fifth RX resonator RX12, the sixth RX resonator RX13, the seventh RX resonator RX14, and the eighth RX resonator RX15 in this order and is output through the RX port 17. Capacitive cross-coupling elements are arranged between the third RX resonant cavity 10 and the fifth RX resonant cavity 12 and between the fifth RX resonant cavity 12 and the seventh RX resonant cavity 14.

In the above embodiments, the RX resonators are arranged according to the signal direction of the signal receiving channel, and the TX resonators are arranged according to the signal direction of the signal transmitting channel. RX denotes a reception port, TX denotes a transmission port, and ANT denotes an antenna port.

In the present application, the resonant cavities are divided into two rows, each row has the same number and is adjacent to or even tangentially staggered, the layout of the rows of cavities is compact, and after the layout of each resonant cavity and the positions of the ANT port 19, the TX port 18 and the RX port 17 are determined, the size of the whole cavity 1 is designed, as shown in fig. 3, the size of the whole cavity 1 is greatly reduced, which is about two thirds of the size and weight of the cavity in the prior art. And after the layout of each resonant cavity is compact, each signal transmission link is correspondingly shortened, and the loss is correspondingly reduced. And the TX port 18 and the RX port 17 are respectively located at two ends of the TX adjusting channel 16 and the RX adjusting channel 15, and no cable connection is needed between the RX port 17 and the RX adjusting channel 15, and no cable connection is needed between the TX port 18 and the TX adjusting channel 16, thereby further reducing loss.

The above-mentioned embodiments only represent the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but it is not understood to limit the scope of the invention, it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention, therefore, all the equivalent changes and modifications made with the scope of the claims of the present invention shall belong to the coverage of the claims of the present invention.

Claims

1. A filter, includes cavity (1), and the middle part of this cavity (1) is provided with ANT port (19), both ends set up TX port (18) and RX port (17) respectively, its characterized in that:

two opposite side surfaces of the filter are respectively provided with a signal sending channel (16) and a signal receiving channel (15), the signal sending channels (16) on the two side surfaces respectively comprise a plurality of TX resonant cavities, and the signal receiving channels (15) on the two side surfaces respectively comprise a plurality of RX resonant cavities; all the TX resonant cavities (161) and the RX resonant cavities (151) are arranged in two rows, the TX resonant cavities of the first row are adjacently staggered with the TX resonant cavities of the second row, and the RX resonant cavities of the first row are adjacently staggered with the RX resonant cavities of the second row; and the signal transmitting channel and the signal receiving channel (15) on two sides of the cavity share one ANT port (19).

2. The filter of claim 1, wherein:

the TX ports (18) are arranged tangentially to two adjacent rows of TX resonant cavities (161); the RX ports (17) are arranged in a tangent mode with the two adjacent rows of RX resonant cavities (151), the resonant cavities in the first row are arranged in a tangent mode with the adjacent resonant cavities in the second row, and the resonant cavities in each adjacent row are arranged in a tangent mode.

3. The filter according to any one of claims 1 to 2, characterized in that: the passband of a signal transmitting channel on the surface of one side of the cavity is positioned in the range of 1830MHz-1880MHz, the signal transmitting channel comprises ten TX resonant cavities and a common resonant cavity, and the TX port, the second TX resonant cavity, the fourth TX resonant cavity, the sixth TX resonant cavity, the eighth TX resonant cavity, the tenth TX resonant cavity and the common resonant cavity are sequentially arranged in a row; the first TX resonant cavity, the third TX resonant cavity, the fifth TX resonant cavity, the seventh TX resonant cavity, the ninth TX resonant cavity and the ANT port are sequentially arranged in the other row of the parallel rows.

4. The filter of claim 3, wherein: windows are arranged between the first TX resonant cavity and the third TX resonant cavity, between the fifth TX resonant cavity and the seventh TX resonant cavity, between the seventh TX resonant cavity and between the ninth TX resonant cavity, and capacitive cross coupling elements are arranged between the third TX resonant cavity and between the fifth TX resonant cavity.

5. The filter according to any one of claims 1 to 2, characterized in that: the passband of the signal receiving channel on the surface of one side of the cavity is within the range of 1735MHz-1785MHz, the signal receiving channel comprises seven RX resonant cavities (151) and a shared resonant cavity, and the ANT port, the first RX resonant cavity, the third RX resonant cavity, the fifth RX resonant cavity and the seventh RX resonant cavity are sequentially arranged in a row; the shared resonant cavity, the second RX resonant cavity, the fourth RX resonant cavity, the sixth RX resonant cavity and the RX port are sequentially arranged in the other row which is arranged in parallel.

6. The filter of claim 5, wherein: and windows are arranged between the first RX resonant cavity and the third RX resonant cavity and between the third RX resonant cavity and the fifth RX resonant cavity.

7. The filter according to any one of claims 1 to 2, characterized in that: the passband of the signal receiving channel on one side surface of the cavity is within the range of 1735MHz-1785MHz, the signal receiving channel comprises the ANT port, seven RX resonant cavities (151) and a shared resonant cavity, wherein the ANT port, the first RX resonant cavity, the third RX resonant cavity, the fifth RX resonant cavity and the sixth RX resonant cavity are sequentially arranged in a row; the shared resonant cavity, the second RX resonant cavity, the fourth RX resonant cavity, the seventh RX resonant cavity and the RX port are sequentially arranged in the other row which is arranged in parallel.

8. The filter according to any one of claims 1 to 2, characterized in that: the passband of a signal transmission channel on the other side surface of the cavity is within the range of 2110MHz-2165MHz, the part of the other side surface of the cavity between the TX port and the ANT port comprises eight TX resonant cavities (161), a spare resonant cavity and a common resonant cavity, and the TX port, the second TX resonant cavity, the fourth TX resonant cavity, the sixth TX resonant cavity, the eighth TX resonant cavity and the common resonant cavity are sequentially arranged in a row; the first TX resonant cavity, the third TX resonant cavity, the fifth TX resonant cavity, the seventh TX resonant cavity, the standby resonant cavity and the ANT port are sequentially arranged in the other row which is arranged in parallel.

9. The filter of claim 8, wherein: and windows are arranged between the second TX resonant cavity and the fourth TX resonant cavity and between the fifth TX resonant cavity and the seventh TX resonant cavity.

10. The filter according to any one of claims 1 to 2, characterized in that: the passband of the signal receiving channel on the other side surface of the cavity is in the range of 1920MHz-1975MHz, the signal receiving channel on the other side surface of the cavity comprises eight RX resonant cavities (151) and a common resonant cavity, the ANT port, the second RX resonant cavity, the fourth RX resonant cavity, the sixth RX resonant cavity and the eighth RX resonant cavity are sequentially arranged in one row, and the common resonant cavity, the first RX resonant cavity, the third RX resonant cavity, the fifth RX resonant cavity, the seventh RX resonant cavity and the RX port are sequentially arranged in the other row which is arranged in parallel.

11. The filter of claim 10, wherein: capacitive cross-coupling elements are arranged between the third RX resonant cavity and the fifth RX resonant cavity and between the fifth RX resonant cavity and the seventh RX resonant cavity.

12. A communications base station comprising a filter according to any one of claims 1 to 11.