WO2021012197A1

WO2021012197A1 - Filter, communication device, remote radio device, transceiving apparatus and tower amplifier

Info

Publication number: WO2021012197A1
Application number: PCT/CN2019/097369
Authority: WO
Inventors: 张海峰
Original assignee: 深圳市大富科技股份有限公司
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2021-01-28
Also published as: CN112544012A

Abstract

Disclosed are a TE-mode dielectric filter, a communication device, a remote radio device, a signal transceiving apparatus and a tower amplifier. The TE-mode dielectric filter comprises: a cavity; and a first resonator, a second resonator and a third resonator arranged in the cavity, wherein the first resonator comprises a first resonant cavity and a first resonant tube; the second resonator comprises a second resonant cavity and a second resonant tube; the third resonator comprises a third resonant cavity and a third resonant tube; the first resonator, the second resonator and the third resonator form a cross coupling structure; and the cross coupling structure comprises two capacitive coupling channels and one inductive coupling channel. By means of making a cross coupling structure formed by a first resonator, a second resonator and a third resonator comprise two capacitive coupling channels and one inductive coupling channel, a new filter high-end zero point implementation method is provided.

Description

Filters, communication and RF remote equipment, transceivers and tower amplifiers

【Technical Field】

The present invention relates to the field of signal processing equipment, in particular to a TE mode dielectric filter, communication equipment, radio frequency remote equipment, signal transceiver and tower top amplifier.

【Background technique】

TE-mode dielectric filters are different from traditional metal filters in energy transmission. In order to add a zero at the high end, a filter 100 including three resonators as shown in FIG. 1 can be used. Among them, the

windows

105 and 106 are respectively opened between the

adjacent resonant cavities

101 and 102 and between 102 and 103, and a metal sheet 104 with short-circuit at both ends is added between the first and the last

resonant cavities

101 and 103, so that you can Add a zero point at the high end. Figure 2 shows a schematic diagram of the topology of the cross-coupling structure of the filter in this configuration. It can be seen that an inductive coupling is formed between the resonators U1, U2, and U3.

The inventor of the present invention found in practice that this configuration scheme requires installation of installation platforms at both ends of the metal sheet 104, the installation method is complicated, the space of the medium cavity is occupied, and the adjustment margin is small. Therefore, a new type of TE mode dielectric filter configuration scheme is needed.

[Content of the invention]

The invention provides a TE mode dielectric filter, communication equipment, radio frequency remote equipment, signal transceiver and tower top amplifier.

In order to solve the above technical problems, a technical solution provided by the present invention is to provide a TE mode dielectric filter, including: a cavity; a first resonator, a second resonator and a third resonator arranged in the cavity; A resonator, wherein the first resonator includes a first resonant cavity and a first resonant tube, the second resonator includes a second resonant cavity and a second resonant tube, and the third resonator includes a third resonant cavity And a third resonance tube; the first resonator, the second resonator and the third resonator form a cross-coupling structure, wherein the cross-coupling structure includes two capacitive coupling channels and an inductive coupling channel .

In order to solve the above technical problems, another technical solution provided by the present invention is to provide a TE mode dielectric filter, comprising: a cavity; a cover plate, the cavity and the cover plate are fixedly connected to form a first A resonant cavity, a second resonant cavity, and a third resonant cavity; a first resonant tube disposed in the first resonant cavity, a second resonant tube disposed in the second resonant cavity, and a third resonant cavity The third resonant tube; a coupling structure that passes through the isolation wall between the first resonant cavity and the second resonant cavity so as to be disposed in the first resonant cavity and the second resonant cavity, the The two ends of the coupling structure are respectively opposite to the first resonant tube and the second resonant tube; wherein, between the second resonant cavity and the third resonant cavity, and between the first resonant cavity and the The third resonance cavities are connected by opening windows; wherein, the first resonance tube, the second resonance tube and the third resonance tube are TE mode dielectric resonance tubes.

In order to solve the above technical problems, another technical solution provided by the present invention is to provide a communication device including a cavity filter for frequency selection of a communication signal. The cavity filter can be any of the aforementioned TE modes. Dielectric filter.

In order to solve the above technical problems, another technical solution provided by the present invention is to provide a remote radio equipment, including a radio frequency transceiver module, a power amplifier module, and any of the aforementioned TE-mode dielectric filters. The radio frequency transceiver module is connected to the The power amplifier module is connected, and the power amplifier module is connected with the TE mode dielectric filter.

In order to solve the above technical problems, another technical solution provided by the present invention is to provide a signal transceiving device, including any of the foregoing TE-mode dielectric filters, the TE-mode dielectric filter is connected to the receiving antenna, and is Perform filtering.

In order to solve the above technical problems, another technical solution provided by the present invention is to provide a tower-mounted amplifier including a low-noise amplifier and a band-pass cavity filter, the cavity filter being any of the aforementioned TE-mode dielectric filters .

The beneficial effect of the present invention is: by making the cross-coupling structure formed by the first resonator, the second resonator and the third resonator include two capacitive coupling channels and one inductive coupling channel, a new type of filter is provided The realization method of high-end zero point.

【Explanation of drawings】

Figure 1 is a schematic diagram of the structure of a TE-mode dielectric filter in the reference technology.

FIG. 2 is a schematic diagram of the topology structure of the TE mode dielectric filter shown in FIG. 1.

FIG. 3 is a schematic structural diagram of an embodiment of a TE mode dielectric filter of the present invention.

FIG. 4 is a schematic diagram of the topology structure of the TE mode dielectric filter shown in FIG. 3.

Fig. 5 is a schematic structural diagram of an embodiment of a communication device of the present invention.

Fig. 6 is a schematic structural diagram of an embodiment of a remote radio frequency device of the present invention.

FIG. 7 is a schematic structural diagram of an embodiment of a signal transceiver device of the present invention.

Fig. 8 is a schematic structural diagram of an embodiment of the tower top amplifier of the present invention.

【Detailed ways】

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to FIG. 3, which is a schematic structural diagram of an embodiment of a TE-mode dielectric filter 200 of the present invention. As shown in FIG. 3, the TE mode dielectric filter 200 may include: a cavity 20, a first resonator 21, a second resonator 22, and a third resonator 23 arranged in the cavity 20. Among them, the first resonator 21 may include a first resonant cavity 211 and a first resonant tube 212, the second resonator 22 may include a second resonant cavity 221 and a second resonant tube 222, and the third resonator 23 may include a third resonator. Cavity 231 and third resonance tube 232.

It can be understood that the TE-mode dielectric filter 200 may further include a cover plate (not shown in the figure), and the cover plate may cover the cavity 20 and be fixedly connected to the cavity 20. The first resonant cavity 211, the second resonant cavity 221, and the third resonant cavity 231 are formed by jointly enclosing the cavity 20 and the cover plate. In this embodiment, in order to clearly show the internal structure of the dielectric filter, the cover plate is not shown.

Optionally, the first resonance tube 212, the second resonance tube 222, and the third resonance tube 232 may be TE mode dielectric resonance tubes, such as ceramic resonance tubes. The cross-sectional shape of each resonance tube may be circular, rectangular, or ring-shaped. Each resonance tube may be fixed to the bottom of the cavity 20 by a fixing member (for example, a bolt), or may be fixedly connected to the cavity 20 in other ways, which is not limited herein. It can be understood that, in some embodiments, the first resonator 21, the second resonator 22, and/or the third resonator 23 may further include a tuning structure that penetrates the cover plate and is arranged opposite to the corresponding resonance tube, such as tuning The specific configuration of the screw and the resonance disk is determined according to the actual application scenario of the product, and does not belong to the limited scope of the present invention.

The first resonator 21, the second resonator 22, and the third resonator 23 form a cross-coupling structure, where the cross-coupling structure includes two capacitive coupling channels and one inductive coupling channel. In some embodiments, a capacitive coupling channel may be formed between the adjacent first resonator 21 and the second resonator 22 and the non-adjacent first resonator 21 and the third resonator 23. An inductive coupling channel is formed between the second resonator 22 and the third resonator 23; in other embodiments, the adjacent second resonator 22 and the third resonator 23 and the non-adjacent first resonator A capacitive coupling channel is formed between the device 21 and the third resonator 23, and an inductive coupling channel is formed between the adjacent first resonator 21 and the second resonator 22; in still other embodiments, the A capacitive coupling channel is formed between the first resonator 21 and the second resonator 22 and the second resonator 21 and the third resonator 23, and between the non-adjacent first resonator 21 and the third resonator 23 Form an inductive coupling channel between.

In some embodiments, the first resonator 21 and the second resonator 22 are capacitively coupled, the second resonator 22 and the third resonator 23 are inductively coupled, and the first resonator 21 and the third resonator are 23 capacitive coupling. Please refer to FIG. 4 in combination, which shows a schematic diagram of the topology in this case. It should be noted that the resonant units U1', U2' and U3' correspond to the first resonator 21, the second resonator 22 and the third resonator 23 respectively. When the electromagnetic wave passes through the capacitive coupling channel U1-U2 or U1-U3, the phase Will change +90°, and when passing through the inductive coupling channel U2-U3, the phase will change -90°. In addition, when the electromagnetic wave frequency is greater than the fundamental mode frequency of the resonance unit U2', its phase will change -90° when passing through the resonance unit U2', and when the electromagnetic wave frequency is less than the fundamental mode frequency of the resonance unit U2', the When U2', its phase will change +90°. Therefore, the following table shows the phase change of electromagnetic waves passing through each channel in the configuration shown in FIG. 4. Among them, f represents the electromagnetic wave frequency, and f0 represents the fundamental mode frequency of the resonant unit U2'. It can be seen that when f<f0, the phase of the electromagnetic wave after passing through the two channels is the same, and when f>f0, the phase of the electromagnetic wave after passing through the two channels is opposite (the phase difference is 180°), which is equivalent to adding at the high end of the filter A zero point.

通道aisle	f<f0f<f0	f>f0f>f0
U1’-U2’-U3’U1’-U2’-U3’	+90+90-90＝+90+90+90-90=+90	+90-90-90＝-90+90-90-90=-90
U1’-U3’U1’-U3’	+90+90	+90+90

Please continue to refer to FIG. 3, in order to realize the above-mentioned cross-coupling structure, in some embodiments, the TE-mode dielectric filter 200 may further include a coupling structure, that is, a flying rod 24. The flying rod 24 passes through the isolation wall (not shown in the figure) between the first resonant cavity 211 and the second resonant cavity 221 in an insulated manner. Optionally, a window (not shown in the figure) can be opened on the partition wall between the first resonant cavity 211 and the second resonant cavity 221, and a mounting platform (not shown) is provided at the bottom of the cavity 20 at a position corresponding to the window. , And the fly rod 24 is fixed on the installation platform by insulating material. It can be understood that the fly rod 24 can also be installed and fixed in other ways, which is not limited here. The two ends of the fly rod 24 are respectively opposite to the first resonator tube 212 and the second resonator tube 222, thereby forming a capacitive coupling between the first resonator 21 and the second resonator 22.

For example, the first end 241 of the fly rod 24 may be opposite to the first resonance tube 212 and maintain a fixed interval with the first resonance tube 212 and extend along the outer circumferential direction of the first resonance tube 212. Similarly, the second end 242 of the fly rod 24 may be opposite to the second resonance tube 222 and maintain a fixed interval from the second resonance tube 222 and extend along the outer circumference of the second resonance tube 222. It can be understood that the thickness of the flying rod 24, the length of the two ends of the flying rod 24 extending along the outer circumference of the resonance tube, and the position of the flying rod 24 relative to the axial direction of the resonance tube can be adjusted accordingly according to the specific application scenarios of the product.

In this embodiment, by setting the flying rod 24, the required capacitive coupling can be formed between the first resonator 21 and the second resonator 22. The installation of the flying rod 24 is simple, and the length and thickness of the flying rod 24 can be adjusted. As well as the distance between the resonance tube and other parameters, the coupling parameters of the channel are adjusted, thereby optimizing the zero point adjustment range of the filter.

Please continue to refer to FIG. 3, in order to achieve the above cross-coupling structure, in some embodiments, the isolation between the second cavity 221 and the third cavity 231, and between the first cavity 211 and the third cavity 231

Windows

25 and 26 can be opened on the wall respectively. Due to the special nature of electromagnetic wave transmission in the TE-mode dielectric filter, under the same window opening conditions, the adjacent second resonator 22 and the third resonator 23 will form a gap. The required inductive coupling is formed, and the required capacitive coupling is formed between the first resonator 21 and the third resonator 23 that are not adjacent. It can be understood that the size and shape of the

windows

25 and 26 can also be determined according to the specific application scenarios of the product. For example, by adjusting the size of the windows 25 and/or 26, the second resonator 22 and the third resonator 23 can be adjusted. And the coupling strength between the first resonator 21 and the third resonator 23.

In some embodiments, the TE-mode dielectric filter 200 shown in FIG. 3 may further include two input and

output terminals

26 and 27. The two input and

output terminals

26 and 27 are connected to the first resonator 21 and the third resonator 23, respectively. The connection is used to import or export the signal into the TE mode dielectric filter 200. Specifically, the input and output end 26 may include a metal resonant tube 262, an IO resonant cavity (that is, a resonant cavity for the input and output ends) 261, and a lead wire 263, and the output and output end 27 may include a metal resonant tube 272, an IO resonant cavity 271, and lead wires. Line 273. Among them, the IO

resonant cavity

261 and 271 can be respectively connected to the first resonant cavity 211 and the third resonant cavity 231, and a window (not shown in the figure) is opened on the isolation wall between them, and the

lead wires

263 and 273 are respectively connected to the metal The

resonance tubes

262 and 272 are connected and extend out of the cavity 20.

Optionally, in the windows between the IO

resonant cavity

261 and 271 and the first resonant cavity 211 and the third resonant cavity 273, tuning screws 28 and 29 can be respectively arranged, and the tuning screws 28 and 29 are adjustablely inserted into the cover plate And extend into the window. The coupling strength between the IO

resonant cavity

261 and 271 and the first resonant cavity 211 and the third resonant cavity 273 can be adjusted by adjusting the inserted length of the tuning screws 28 and 29.

In the above embodiment, a flying rod is used to form a capacitive coupling channel between the first resonator and the second resonator, and an inductive coupling channel is formed between the second resonator and the third resonator by opening a window. A capacitive coupling channel is formed between the filter and the third resonator, thereby realizing the configuration scheme of adding zeros at the high end of the new TE mode dielectric filter. In addition, the size and shape of the fly rod and the window can be adjusted to conveniently adjust the coupling strength of each channel. Therefore, the zero point adjustment range of the TE mode dielectric filter can be optimized.

Please refer to FIG. 5, which is a schematic structural diagram of an embodiment of a communication device 300 of the present invention. As shown in FIG. 5, the communication device 300 may include a cavity filter 301 for frequency selection of a communication signal, where the cavity filter 301 may include the TE mode dielectric filter of any of the foregoing embodiments.

Please refer to FIG. 6, which is a schematic structural diagram of an embodiment of a remote radio device 400 of the present invention. As shown in FIG. 6, the remote radio equipment 400 may include a radio frequency transceiver module 401, a power amplifier module 402, and a TE mode dielectric filter 403. The radio frequency transceiver module 401 is connected to the power amplifier module 402, and the power amplifier module 402 is connected to the TE mode dielectric filter 403. The TE-mode dielectric filter 403 may include the TE-mode dielectric filter of any of the foregoing embodiments.

Please refer to FIG. 7, which is a schematic structural diagram of an embodiment of a signal transceiving apparatus 500 of the present invention. As shown in FIG. 7, the signal transceiving device 500 may include a TE-mode dielectric filter 501 and a receiving antenna 502. The TE-mode dielectric filter 501 is connected to the receiving antenna 502 and filters the received signal. The TE-mode dielectric filter 501 may include the TE-mode dielectric filter of any of the foregoing embodiments.

Please refer to FIG. 8, which is a schematic structural diagram of an embodiment of the tower top amplifier 600 of the present invention. As shown in FIG. 8, the tower mounted amplifier 600 includes a cavity filter 601 and a low noise amplifier 602 connected thereto. Wherein, the cavity filter 601 may include the TE mode dielectric filter of any of the foregoing embodiments.

The above are only the embodiments of the present invention and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description and drawings of the present invention, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of the present invention.

Claims

A TE-mode dielectric filter, characterized in that it comprises:

Cavity

The first resonator, the second resonator and the third resonator arranged in the cavity, wherein the first resonator includes a first resonator cavity and a first resonator tube, and the second resonator includes a first resonator Two resonance cavities and a second resonance tube, the third resonator includes a third resonance cavity and a third resonance tube;

The first resonator, the second resonator and the third resonator form a cross-coupling structure, wherein the cross-coupling structure includes two capacitive coupling channels and one inductive coupling channel.
The TE-mode dielectric filter according to claim 1, wherein:

The first resonance tube, the second resonance tube and the third resonance tube are TE mode dielectric resonance tubes.
The TE-mode dielectric filter according to claim 1, wherein:

The first resonator and the second resonator are capacitively coupled, the second resonator and the third resonator are inductively coupled, and the first resonator and the third resonator are inductively coupled Capacitive coupling between devices.
The TE-mode dielectric filter according to claim 3, wherein:

It also includes a fly rod, which passes through the isolation wall between the first resonant cavity and the second resonant cavity in an insulated manner, and the two ends of the fly rod are connected to the first resonance tube and the The second resonance tube is opposed to each other, thereby forming a capacitive coupling between the first resonator and the second resonator.
The TE-mode dielectric filter according to claim 4, wherein:

The first end of the fly rod is opposite to the first resonance tube, maintains a fixed interval with the first resonance tube, and extends along the outer circumferential direction of the first resonance tube;

The second end of the fly rod is opposite to the second resonance tube, maintains a fixed interval with the second resonance tube, and extends along the outer circumferential direction of the second resonance tube.
The TE-mode dielectric filter according to claim 3, wherein:

A window is opened on the isolation wall between the second resonant cavity and the third resonant cavity, and between the first resonant cavity and the third resonant cavity, so that a window is provided between the second resonator and the third resonator. An inductive coupling is formed between the third resonator, and a capacitive coupling is formed between the first resonator and the third resonator.
The TE-mode dielectric filter according to claim 1, further comprising a cover plate, the cover plate is fixedly connected to the cavity and forms the first resonant cavity and the second resonant cavity together. And the third resonant cavity.
5. The TE-mode dielectric filter according to claim 1, further comprising two input and output terminals, and the two input and output terminals are respectively connected to the first resonator and the third resonator.
The TE mode dielectric filter according to claim 8, wherein:

The input and output ends include a metal resonance tube, an IO resonance cavity and lead wires;

The IO resonant cavities of the two input and output terminals are respectively connected to the first resonant cavity and the third resonant cavity, and a window is opened on the isolation wall between;

The lead wire is connected with the metal resonance tube and extends out of the cavity.
A TE-mode dielectric filter, characterized in that it comprises:

Cavity

A cover plate, the cavity body and the cover plate are fixedly connected and jointly form a first resonant cavity, a second resonant cavity and a third resonant cavity;

A first resonance tube arranged in the first resonance cavity, a second resonance tube arranged in the second resonance cavity, and a third resonance tube arranged in the third resonance cavity;

The coupling structure passes through the isolation wall between the first resonant cavity and the second resonant cavity so as to be disposed in the first resonant cavity and the second resonant cavity. Both ends of the coupling structure Respectively opposite to the first resonance tube and the second resonance tube;

Wherein, between the second resonant cavity and the third resonant cavity, and between the first resonant cavity and the third resonant cavity are connected by opening a window;

Wherein, the first resonance tube, the second resonance tube and the third resonance tube are TE mode dielectric resonance tubes.
The TE-mode dielectric filter according to claim 10, wherein:

The first end of the coupling structure is opposite to the first resonance tube, maintains a fixed interval with the first resonance tube, and extends along the outer circumference of the first resonance tube;

The second end of the coupling structure is opposite to the second resonance tube, maintains a fixed interval with the second resonance tube, and extends along the outer circumferential direction of the second resonance tube.
8. The TE mode dielectric filter of claim 10, further comprising:

Two IO resonant cavities formed by the cavity and the cover plate, the two IO resonant cavities are respectively connected to the first resonant cavity and the third resonant cavity through opening windows;

Two metal resonance tubes are respectively arranged in the two IO resonance cavities;

Two lead wires are respectively connected with the metal resonance tube and extend out of the cavity.
The TE-mode dielectric filter of claim 12, further comprising:

Two tuning screws, which are adjustably inserted into the cover plate, are respectively arranged in the window between the IO resonant cavity and the first resonant cavity, and between the IO resonant cavity and the third resonant cavity Inside the window.
A communication device, characterized by comprising a cavity filter for frequency selection of a communication signal, the cavity filter being the TE mode dielectric filter according to any one of claims 1 to 13.
A remote radio frequency device, characterized by comprising: a radio frequency transceiver module, a power amplifier module, and the TE mode dielectric filter according to any one of claims 1 to 13, the radio frequency transceiver module and the power amplifier Module connection, and the power amplifier module is connected to the TE mode dielectric filter.
A signal transceiver device, comprising the TE-mode dielectric filter according to any one of claims 1 to 13, wherein the TE-mode dielectric filter is connected to a receiving antenna and filters the received signal.
A tower-mounted amplifier, characterized by comprising a low-noise amplifier and a band-pass cavity filter, the band-pass cavity filter being the TE-mode dielectric filter according to any one of claims 1 to 13.