CN112544012A

CN112544012A - Filter, communication and radio frequency remote equipment, transceiver and tower top amplifier

Info

Publication number: CN112544012A
Application number: CN201980003089.8A
Authority: CN
Inventors: 张海峰
Original assignee: Shenzhen Tatfook Technology Co Ltd
Current assignee: Shenzhen Tatfook Technology Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2021-03-23
Also published as: WO2021012197A1

Abstract

The invention discloses a TE mode dielectric filter, a communication device, a radio remote device, a signal receiving and transmitting device and a tower amplifier, wherein the TE mode dielectric filter comprises: a cavity; the resonator comprises a first resonator, a second resonator and a third resonator which are arranged in a 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, and 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, wherein the cross-coupling structure comprises two capacitive coupling channels and one inductive coupling channel. A novel implementation method of a high-end zero point of a filter is provided by enabling a cross-coupling structure formed by a first resonator, a second resonator and a third resonator to comprise two capacitive coupling channels and one inductive coupling channel.

Description

Filter, communication and radio frequency remote equipment, transceiver and tower top amplifier

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

The TE mode dielectric filter differs from the conventional metal filter in energy transfer. To add a zero at the high end, a filter 100 comprising three resonators as shown in fig. 1 may be used. Windows 105 and 106 are respectively arranged between the

adjacent resonant cavities

101 and 102 and between the

adjacent resonant cavities

102 and 103, and a metal sheet 104 with two short-circuited ends is added between the two

resonant cavities

101 and 103 from head to tail, so that a zero point can be added at the high end. Fig. 2 shows a schematic of the topology of the cross-coupling structure of the filter in this configuration. It can be seen that inductive coupling is formed between the resonators U1, U2 and U3.

The inventor of the present invention finds in practice that the configuration scheme requires installation platforms to be built at both ends of the metal sheet 104, the installation mode is complex, the space of the medium cavity is occupied, and the adjustment margin is small. Therefore, a new TE mode dielectric filter configuration scheme is needed.

[ summary of the invention ]

The invention provides a TE mode dielectric filter, communication equipment, radio remote equipment, a signal receiving and transmitting device and a tower top amplifier.

In order to solve the above technical problems, the present invention provides a technical solution: there is provided a TE mode dielectric filter comprising: a cavity; the resonator comprises a cavity, a first resonator, a second resonator and a third resonator, wherein the first resonator, the second resonator and the third resonator are arranged in the cavity; the first resonator, the second resonator and the third resonator form a cross-coupling structure, wherein the cross-coupling structure comprises two capacitive coupling channels and one inductive coupling channel.

In order to solve the above technical problems, another technical solution provided by the present invention is: there is provided a TE mode dielectric filter comprising: a cavity; the cavity and the cover plate are fixedly connected and form a first resonant cavity, a second resonant cavity and a third resonant cavity together; the first resonant tube is arranged on the first resonant cavity, the second resonant tube is arranged on the second resonant cavity, and the third resonant tube is arranged on the third resonant cavity; the coupling structure passes through a partition wall between the first resonant cavity and the second resonant cavity and is arranged in the first resonant cavity and the second resonant cavity, and two ends of the coupling structure are respectively opposite to the first resonant tube and the second resonant tube; the second resonant cavity and the third resonant cavity, and the first resonant cavity and the third resonant cavity are connected through a window; the first resonator tube, the second resonator tube and the third resonator tube are TE mode dielectric resonator tubes.

In order to solve the above technical problems, another technical solution provided by the present invention is: there is provided a communication device comprising a cavity filter for frequency selecting a communication signal, the cavity filter being any of the TE mode dielectric filters described above.

In order to solve the above technical problems, another technical solution provided by the present invention is: the radio frequency remote equipment comprises a radio frequency transceiver module, a power amplifier module and any one TE mode dielectric filter, wherein the radio frequency transceiver module is connected with the power amplifier module, 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: a signal transceiver is provided, which comprises any one of the TE mode dielectric filters, the TE mode dielectric filter is connected with a receiving antenna and filters a received signal.

In order to solve the above technical problems, another technical solution provided by the present invention is: a tower top amplifier is provided, which comprises a low noise amplifier and a band-pass cavity filter, wherein the cavity filter is any one of the TE mode dielectric filters.

The invention has the beneficial effects that: a novel implementation method of a high-end zero point of a filter is provided by enabling a cross-coupling structure formed by a first resonator, a second resonator and a third resonator to comprise two capacitive coupling channels and one inductive coupling channel.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a TE mode dielectric filter in the reference technology.

Fig. 2 is a schematic view of the topology of the TE mode dielectric filter shown in fig. 1.

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

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

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

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

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

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

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a TE mode dielectric filter 200 according to an embodiment of the 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 disposed in the cavity 20. Wherein, 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 resonant cavity 231 and a third resonant tube 232.

It is understood that the TE mode dielectric filter 200 may further include a cover plate (not shown), and the cover plate may be covered on the cavity 20 and 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 the cavity 20 and the cover plate. In the present embodiment, the cover plate is not shown in order to clearly show the internal structure of the dielectric filter.

Alternatively, the first, second and

third resonator tubes

212, 222, 232 may be TE mode dielectric resonator tubes, such as ceramic resonator tubes. The cross-sectional shape of each resonator tube may be circular, rectangular, circular, etc. The resonator tubes may be fixed to the bottom of the cavity 20 by a fixing member (e.g. a bolt), or may be fixedly connected to the cavity 20 in other manners, which is not limited herein. It is 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, such as a tuning screw and a resonant disk, disposed through the cover plate and opposite to the corresponding resonant tube, and the specific configuration thereof depends on the actual application scenario of the product and is not within the limitation of the present invention.

The first resonator 21, the second resonator 22 and the third resonator 23 form a cross-coupled structure, wherein the cross-coupled structure comprises two capacitive coupling paths and one inductive coupling path. In some embodiments, a capacitive coupling path may be formed between the adjacent first and

second resonators

21 and 22 and the non-adjacent first and

third resonators

21 and 23, and an inductive coupling path may be formed between the adjacent second and

third resonators

22 and 23; in other embodiments, a capacitive coupling path may be formed between the adjacent second and

third resonators

22 and 23 and the non-adjacent first and

third resonators

21 and 23, and an inductive coupling path may be formed between the adjacent first and

second resonators

21 and 22; in still other embodiments, a capacitive coupling path may be formed between adjacent first and

second resonators

21 and 22 and second and

third resonators

21 and 23, while an inductive coupling path may be formed between non-adjacent first and

third resonators

21 and 23.

In some embodiments, the first resonator 21 is capacitively coupled to the second resonator 22, the second resonator 22 is inductively coupled to the third resonator 23, and the first resonator 21 is capacitively coupled to the third resonator 23. Referring to fig. 4, fig. 4 shows a schematic topology of the 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, and the phase of the electromagnetic wave changes by +90 ° when passing through the capacitive coupling channels U1-U2 or U1-U3, and changes by-90 ° when passing through the inductive coupling channels U2-U3. Further, when the frequency of the electromagnetic wave is greater than the fundamental mode frequency of the resonating unit U2 ', the phase thereof may be changed by-90 ° while passing through the resonating unit U2', and when the frequency of the electromagnetic wave is less than the fundamental mode frequency of the resonating unit U2 ', the phase thereof may be changed by +90 ° while passing through the resonating unit U2'. Thus, the following table shows the phase change of the electromagnetic wave passing through each channel in the configuration shown in fig. 4. Where f denotes an electromagnetic wave frequency, and f0 denotes a fundamental mode frequency of the resonance unit U2'. It can be seen that when f < f0, the phases of the electromagnetic waves passing through the two channels are the same, and when f > f0, the phases of the electromagnetic waves passing through the two channels are opposite (180 ° apart), which is equivalent to adding a zero point at the high end of the filter.

Channel	f<f0	f>f0
U1’-U2’-U3’	+90+90-90＝+90	+90-90-90＝-90
U1’-U3’	+90	+90

With continued reference to fig. 3, to implement the cross-coupling structure, in some embodiments, the TE mode dielectric filter 200 may further include a coupling structure, i.e., a flying bar 24. The flying bar 24 passes through a partition wall (not shown) between the first resonant cavity 211 and the second resonant cavity 221 in an insulated manner. Alternatively, a window (not shown) may be formed in the partition wall between the first resonant cavity 211 and the second resonant cavity 221, a mounting table (not shown) may be provided at the bottom of the cavity 20 at a position corresponding to the window, and the flying bar 24 may be fixed to the mounting table through an insulating material. It is understood that the flying bar 24 can be fixed by other means, and is not limited herein. The flying bar 24 has opposite ends facing the first resonator tube 212 and the second resonator tube 222, respectively, so as to form capacitive coupling between the first resonator 21 and the second resonator 22.

For example, the first end 241 of the flying rod 24 may be opposite the first resonator tube 212, at a fixed spacing from the first resonator tube 212 and extending in the direction of the outer circumference of the first resonator tube 212. Similarly, the second end 242 of the flying bar 24 may be opposite the second resonator tube 222, at a fixed spacing from the second resonator tube 222 and extending in the direction of the outer circumference of the second resonator tube 222. It is understood that the thickness of the flying bar 24, the length of the two ends of the flying bar 24 extending along the outer circumference of the resonator tube, and the position of the flying bar 24 relative to the axial direction of the resonator tube may be adjusted accordingly according to the specific application scenario of the product.

The present embodiment can form the required capacitive coupling between the first resonator 21 and the second resonator 22 by providing the flying bar 24, the installation of the flying bar 24 is simple, and the coupling parameters of the channel can be adjusted by adjusting the parameters such as the length, the thickness and the distance between the flying bar 24 and the resonator tube, thereby optimizing the zero point adjustment range of the filter.

With continued reference to fig. 3, in order to implement the above-mentioned cross-coupling structure, in some embodiments,

windows

25 and 26 may be respectively opened on the partition walls between the second resonant cavity 221 and the third resonant cavity 231 and between the first resonant cavity 211 and the third resonant cavity 231, under the condition of opening the windows, due to the particularity of electromagnetic wave transmission in the TE mode dielectric filter, a desired inductive coupling may be formed between the adjacent second resonator 22 and the third resonator 23, and a desired capacitive coupling may be formed between the non-adjacent first resonator 21 and the third resonator 23. It will be appreciated that the size and shape of the

windows

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

In some embodiments, the TE mode dielectric filter 200 shown in fig. 3 may further include two input/

output terminals

26 and 27, and the two input/

output terminals

26 and 27 are respectively connected to the first resonator 21 and the third resonator 23 for introducing or outputting signals into or out of the TE mode dielectric filter 200. Specifically, the input and

output ends

26 and 27 may include a metal resonator tube 262, an IO resonator (i.e., a resonator for input and output ends) 261 and an output line 263, respectively, and a metal resonator tube 272, an IO resonator 271 and an output line 273, respectively. The IO

resonant cavities

261 and 271 may be respectively connected to the first resonant cavity 211 and the third resonant cavity 231, and a window (not shown) is formed on a partition wall therebetween, and the

outgoing lines

263 and 273 are respectively connected to the metal

resonant tubes

262 and 272 and extend out of the cavity 20.

Alternatively, tuning screws 28 and 29 may be disposed in windows between the

IO cavities

261 and 271 and the first and

third cavities

211 and 273, respectively, and the tuning screws 28 and 29 may be adjustably inserted into the cover plate and extend into the windows. The coupling strength between the

IO resonators

261 and 271 and the first and

third resonators

211 and 273 can be adjusted by adjusting the length of insertion of the tuning screws 28 and 29.

In the embodiment, the capacitive coupling channel is formed between the first resonator and the second resonator by using the flying rod, the inductive coupling channel is formed between the second resonator and the third resonator by opening the window, and the capacitive coupling channel is formed between the first resonator and the third resonator, so that a novel configuration scheme of adding the zero point at the high end of the TE mode dielectric filter is realized. In addition, the coupling strength of each channel can be conveniently adjusted by adjusting the size, the shape and the like of the flying bar and the window, so that the zero point adjusting range of the TE mode dielectric filter can be optimized.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a communication device 300 according to an embodiment of the present invention. As shown in fig. 5, the communication device 300 may include a cavity filter 301 for frequency selecting a communication signal, wherein the cavity filter 301 may include a TE mode dielectric filter of any of the embodiments described above.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a remote radio device 400 according to an embodiment of the present invention. As shown in fig. 6, the remote rf device 400 may include a radio transceiver module 401, a power amplifier module 402, and a TE mode dielectric filter 403. The radio frequency transceiving module 401 is connected with a power amplifier module 402, and the power amplifier module 402 is connected with a TE mode dielectric filter 403. The TE mode dielectric filter 403 may include the TE mode dielectric filter of any of the above embodiments.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a signal transceiver 500 according to an embodiment of the present invention. As shown in fig. 7, the transceiver 500 may include a TE mode dielectric filter 501 and a receiving antenna 502, where the TE mode dielectric filter 501 is connected to the receiving antenna 502 and filters a received signal. The TE mode dielectric filter 501 may include the TE mode dielectric filter of any of the above embodiments.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a tower top amplifier 600 according to an embodiment of the present invention. As shown in fig. 8, the tower top amplifier 600 includes a cavity filter 601 and a low noise amplifier 602 connected thereto. The cavity filter 601 may include the TE mode dielectric filter of any of the embodiments described above.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

A TE mode dielectric filter, comprising:

a cavity;

the resonator comprises a cavity, a first resonator, a second resonator and a third resonator, wherein the first resonator, the second resonator and the third resonator are arranged in the cavity;

the first resonator, the second resonator and the third resonator form a cross-coupling structure, wherein the cross-coupling structure comprises two capacitive coupling channels and one inductive coupling channel.
A TE mode dielectric filter as recited in claim 1, wherein:

the first resonant tube, the second resonant tube and the third resonant tube are TE mode dielectric resonant tubes.
A TE mode dielectric filter as recited in 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 capacitively coupled.
A TE mode dielectric filter as recited in claim 3, wherein:

the flying rod penetrates through the separation wall between the first resonant cavity and the second resonant cavity in an insulating mode, and two ends of the flying rod are opposite to the first resonant tube and the second resonant tube respectively, so that capacitive coupling is formed between the first resonator and the second resonator.
A TE mode dielectric filter according to claim 4, characterized in that:

a first end of the flying bar is opposite to the first resonant tube, keeps a fixed interval with the first resonant tube and extends along the peripheral direction of the first resonant tube;

the second end of the flying bar is opposed to the second resonator tube, is spaced from the second resonator tube at a fixed interval, and extends in the outer circumferential direction of the second resonator tube.
A TE mode dielectric filter as recited in claim 3, wherein:

windows are arranged on the partition walls between the second resonant cavity and the third resonant cavity and between the first resonant cavity and the third resonant cavity, so that inductive coupling is formed between the second resonator and the third resonator, and capacitive coupling is formed between the first resonator and the third resonator.
A TE mode dielectric filter as recited in claim 1 further comprising a cover plate fixedly attached to said cavity and collectively forming said first resonant cavity, said second resonant cavity, and said third resonant cavity.
A TE-mode dielectric filter as recited in claim 1, further comprising two input/output terminals connected to said first resonator and said third resonator, respectively.
A TE mode dielectric filter as recited in claim 8, wherein:

the input end and the output end comprise metal resonance tubes, IO resonance cavities and outgoing lines;

the IO resonant cavities of the two input and output ends are respectively connected with the first resonant cavity and the third resonant cavity, and a window is formed in a partition wall between the IO resonant cavities;

the outgoing line is connected with the metal resonance tube and extends out of the cavity.
A TE mode dielectric filter, comprising:

a cavity;

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

the first resonant tube is arranged on the first resonant cavity, the second resonant tube is arranged on the second resonant cavity, and the third resonant tube is arranged on the third resonant cavity;

the coupling structure passes through a partition wall between the first resonant cavity and the second resonant cavity and is arranged in the first resonant cavity and the second resonant cavity, and two ends of the coupling structure are respectively opposite to the first resonant tube and the second resonant tube;

the second resonant cavity and the third resonant cavity, and the first resonant cavity and the third resonant cavity are connected through a window;

the first resonator tube, the second resonator tube and the third resonator tube are TE mode dielectric resonator tubes.
A TE mode dielectric filter as recited in claim 10, wherein:

the first end of the coupling structural member is opposite to the first resonant tube, keeps a fixed interval with the first resonant tube and extends along the peripheral direction of the first resonant tube;

the second end of the coupling structure member is opposite to the second resonator tube, maintains a fixed interval with the second resonator tube, and extends along the peripheral direction of the second resonator tube.
A TE mode dielectric filter as recited in claim 10, further comprising:

the two IO resonant cavities are formed by the cavity and the cover plate and are respectively connected with the first resonant cavity and the third resonant cavity through windows;

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

and the two outgoing lines are respectively connected with the metal resonance tubes and extend out of the cavity.
A TE mode dielectric filter as recited in claim 12, further comprising:

and the two tuning screws are adjustably inserted into the cover plate, and are respectively arranged in a window between the IO resonant cavity and the first resonant cavity and a window between the IO resonant cavity and the third resonant cavity.
A communication device comprising a cavity filter for frequency selecting a communication signal, wherein the cavity filter is the TE mode dielectric filter of any one of claims 1 to 13.
A radio remote unit, comprising: the TE mode dielectric filter comprises a radio frequency transceiver module, a power amplifier module and the TE mode dielectric filter according to any one of claims 1 to 13, wherein the radio frequency transceiver module is connected with the power amplifier module, and the power amplifier module is connected with the TE mode dielectric filter.
A signal transceiving apparatus 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 a received signal.
A tower top amplifier comprising a low noise amplifier and a band-pass cavity filter, wherein the band-pass cavity filter is the TE mode dielectric filter of any one of claims 1 to 13.