CN212991279U - Coupling device, filter and communication equipment - Google Patents
Coupling device, filter and communication equipment Download PDFInfo
- Publication number
- CN212991279U CN212991279U CN202021833739.8U CN202021833739U CN212991279U CN 212991279 U CN212991279 U CN 212991279U CN 202021833739 U CN202021833739 U CN 202021833739U CN 212991279 U CN212991279 U CN 212991279U
- Authority
- CN
- China
- Prior art keywords
- coupling
- cavity
- coupling body
- transmission line
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
- Transmitters (AREA)
Abstract
The application discloses coupling device, wave filter and communications facilities, this coupling device sets up in the cavity of wave filter, and this coupling device includes: the coaxial transmission line is used for transmitting signals and is provided with a coupling cavity; the first surface of the printed circuit board covers the coupling cavity; the first coupling body and the second coupling body are arranged on the first surface of the printed circuit board, the first coupling body and the second coupling body are arranged in parallel along the radial direction of the coaxial transmission line, and the first coupling body and the second coupling body sample signals through coupling. Through the mode, the arrangement length of the first coupling body and the second coupling body of the coupling device is shorter along the axis of the coaxial transmission line, and less available cavity space of the filter is occupied so as to optimize the overall index of the filter.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a coupling device, a filter, and a communication device.
Background
In a microwave communication system, after a filter filters out an out-of-band signal, the signal passes through a transmitting end of the filter and is transmitted to an antenna through a transmission line, and then is transmitted by the antenna. In an ideal situation, the signal is transmitted entirely through the antenna. In practice, part of the signal is always reflected back. Especially when the antenna is open or short circuited, the signal is totally reflected back. If the reflected signal is too large, it may cause the operating range of the radio to shrink, the transmitted signal to saturate the receiving portion, or the radio to overheat. The more serious effect is to damage the transmitter and break down the transmission dielectric.
In order to prevent the reflected signal from being too large and damaging the transmitter, two directional couplers, a forward coupler and a backward coupler, are usually added to the filter. The coupler extracts signals from the main path transmission signals according to a certain proportion, and normal communication of the main path is not affected. Because the proportion of the signal coupled out by the coupler and the transmission signal of the main path is changed, the current transmission power and the reflection power of the signal of the main path can be obtained according to the transmission power coupled by the forward coupler and the reflection power coupled by the backward coupler. The current working state of the antenna can be obtained through the acquired transmitting power and the reflected power of the main path signal, and the radio device is prevented from being damaged when the antenna works abnormally.
The prior art generally places the forward coupler and the backward coupler above the transmission line in the filter cavity and arranges them in a serial manner along the axial direction of the coaxial transmission line. The arrangement mode can lead the coupler to be longer, occupy more available cavity space of the filter and influence the index of the filter.
SUMMERY OF THE UTILITY MODEL
The application provides a coupling device, wave filter and communications facilities, can subtract the length that coupling device arranged along coaxial transmission line axial, occupy less wave filter available cavity space, optimize the whole index of wave filter.
In order to solve the technical problem, the application adopts a technical scheme that: there is provided a coupling device disposed within a cavity of a filter, the coupling device comprising: the coaxial transmission line is used for transmitting signals and is provided with a coupling cavity; the first surface of the printed circuit board covers the coupling cavity; the first coupling body and the second coupling body are arranged on the first surface of the printed circuit board, the first coupling body and the second coupling body are arranged in parallel along the radial direction of the coaxial transmission line, and the first coupling body and the second coupling body sample signals through coupling.
Furthermore, the coupling cavity comprises a first coupling cavity and a second coupling cavity, the first coupling body is arranged in the first coupling cavity, and the second coupling body is arranged in the second coupling cavity.
Further, the coaxial transmission line is provided with a first window and a second window, the first window is located in the first coupling cavity, the first coupling body couples signals through the first window, the second window is arranged in the second coupling cavity, and the second coupling body couples signals through the first window.
Furthermore, the first coupling body and the second coupling body are microstrip lines, the signals comprise transmitting signals and reflecting signals, the first coupling body is used for coupling the transmitting signals, and the second coupling body is used for coupling the reflecting signals.
Furthermore, a first isolation end, a first coupling output end, a second isolation end and a second coupling output end are arranged on the second surface of the printed circuit board, one end of the first coupling body is connected with the first isolation end, and the other end of the first coupling body is connected with the first coupling output end; one end of the second coupling body is connected with the second isolation end, and the other end of the second coupling body is connected with the second coupling output end; the second surface is opposite to the first surface.
Furthermore, a first fixed load is arranged between the first isolation end and the first coupling body, a second fixed load is arranged between the second isolation end and the second coupling body, and the first fixed load and the second fixed load are arranged on the second surface of the printed circuit board.
Furthermore, the coupling device also comprises a tuner, wherein the tuner is arranged on the printed circuit board and is used for adjusting the electromagnetic field distribution in the coupling cavity.
Further, the coaxial transmission line comprises a connecting rod, a cavity and a medium, the connecting rod and the medium are arranged in the cavity, and the medium is located between the cavity and the connecting rod.
In order to solve the above technical problem, the present application further provides a filter, which includes a cavity and the coupling device as described above, where the coupling device is disposed in the cavity.
In order to solve the above technical problem, the present application further provides a communication apparatus including the coupling device as in the above, wherein one end of a coaxial transmission line of the coupling device is connected to the transmitting end and the output end of the filter, and the other end of the coaxial transmission line is connected to the antenna through a connector.
The application has at least the following beneficial effects: the first coupling body and the second coupling body of the coupling device are shorter in axial arrangement length along the coaxial transmission line, occupy less available cavity space of the filter, and can optimize the overall index of the filter.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a coupling device of the present application;
FIG. 2 is a schematic, broken away view of the coupling device of FIG. 1;
FIG. 3 is a side view of the coupling device of FIG. 1;
fig. 4 is a schematic structural diagram of an embodiment of the filter of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present application provides a coupling device 10, the coupling device 10 being arranged in a cavity of a filter. Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of an embodiment of a coupling device 10 of the present application, fig. 2 is a schematic structural diagram of the coupling device 10 in fig. 1, and fig. 3 is a side view of the coupling device 10 in fig. 1.
As shown in fig. 1 and 2, the coupling device 10 includes a coaxial transmission line 11, a Printed Circuit Board (PCB) 12, a first coupling body 13, and a second coupling body 14.
In particular, the coaxial transmission line 11 is used for transmitting signals, such as radio frequency signals. One end of the coaxial transmission line 11 may be connected to a transmitting end and a receiving end of the filter, and the other end thereof is connected to the antenna through a connector, so as to realize signal transmission between the filter and the antenna. More specifically, the radio frequency signal is transmitted from the transmitting end of the filter to the antenna through the coaxial transmission line 11, and the antenna further transmits the radio frequency signal; the radio frequency signal reflected from the antenna is transmitted to the receiving end of the filter via a coaxial transmission line 11.
Referring to fig. 3, the coaxial transmission line 11 includes a connecting rod 1113, a cavity 1114 and a medium 1115. Connecting rod 1113 and medium 1115 are disposed within cavity 1114, with medium 1115 between cavity 1114 and connecting rod 1113. Specifically, the cavity 1114 may be a housing of a coaxial transmission line, and may be made of metal; the medium 1115 may be air or Polytetrafluoroethylene (PTFE) or the like.
Specifically, referring to fig. 1 and fig. 2, the coaxial transmission line 11 is provided with a coupling cavity 111, and the first surface 121 of the printed circuit board 12 covers the coupling cavity 111, so that the coupling cavity 111 and the printed circuit board 12 form a sealed cavity to prevent the radio frequency signal from leaking. The first surface 121 of the printed circuit board 12 may be soldered to one side of the coupling cavity 111 to cover the coupling cavity 111. The first coupling body 13 and the second coupling body 14 are disposed on the first surface 121 of the printed circuit board 12, the first coupling body 13 and the second coupling body 14 are disposed in parallel along a radial direction S of the coaxial transmission line 11, and the first coupling body 13 and the second coupling body 14 sample the radio frequency signal through coupling. The coaxial transmission line 11 has an axial direction L, the axial direction L is a length direction of the coaxial transmission line 11, and the radial direction S is perpendicular to the axial direction L.
The first coupling body 13 and the second coupling body 14 are arranged in parallel along the radial direction S of the coaxial transmission line 11, so that the first coupling body 13 and the second coupling body 14 are shorter in the axial arrangement length along the coaxial transmission line 11, and occupy less available cavity space of the filter, thereby optimizing the overall index of the filter. More specifically, the coupling cavity 111 includes a first coupling cavity 1111 and a second coupling cavity 1112, the first coupling body 13 is disposed in the first coupling cavity 1111, and the second coupling body 14 is disposed in the second coupling cavity 1112. The first coupling cavity 1111 and the second coupling cavity 1112 are two independent coupling cavities.
More specifically, the coaxial transmission line 11 is provided with a first window (not shown) and a second window (not shown), the first window is located in the first coupling cavity 1111, the first coupling body 13 couples the radio frequency signal through the first window, the second window is located in the second coupling cavity 1112, and the second coupling body 14 couples the radio frequency signal through the second window. In some embodiments, the cavity 1114 of the coaxial transmission line 11 defines a first opening, i.e., a first window; the cavity 1114 of the coaxial transmission line 11 defines a second opening, i.e., a second window, and the first opening and the second opening do not overlap. The first coupling body 13 couples the radio frequency signal from the coaxial transmission line 11 through the first window, and the second coupling body 14 couples the radio frequency signal from the coaxial transmission line 11 through the second window.
Optionally, the coaxial transmission line 11 further includes a first coupling cavity wall and a second coupling cavity wall, the first coupling cavity wall is enclosed in the first window to form a cavity space of the first coupling cavity 1111, and the second coupling cavity wall is enclosed in the second window to form a cavity space of the second coupling cavity 1112.
Specifically, the first coupling body 13 and the second coupling body 14 may be microstrip lines, the radio frequency signal includes a transmission radio frequency signal and a reflection radio frequency signal, the first coupling body 13 is configured to couple the transmission radio frequency signal, and the second coupling body 14 is configured to couple the reflection radio frequency signal. In other embodiments, the first coupling body 13 and the second coupling body 14 may both be metal sheets, or the first coupling body 13 and the second coupling body 14 may be any one of microstrip lines and metal sheets. When a transmission radio frequency signal is transmitted from the transmitting end of the filter to the antenna, the first coupling body 13 couples the part of the transmission radio frequency signal to transmit the radio frequency signal so as to calculate the transmitting power of the antenna. When the received rf signal is reflected from the antenna to the receiving end of the filter, the second coupling body 14 transmits the rf signal from the coupling portion of the reflected rf signal to calculate the reflected power of the antenna.
The first coupling body 13, the coupling circuit and other circuits form a first coupler, which may be a forward coupler. The second coupling body 14 forms a second coupler, which may be a counter coupler, with the coupling circuit and other circuits.
Specifically, the second surface 122 of the printed circuit board 12 is provided with a first isolation terminal (not shown), a first coupling output terminal (not shown), a second isolation terminal (not shown), and a second coupling output terminal (not shown), and the second surface 122 is disposed opposite to the first surface 121. One end of the first coupling body 13 is connected to the first isolation end, and the other end of the first coupling body 13 is connected to the first coupling output end. One end of the second coupling body 14 is connected to the second isolation end, and the other end of the second coupling body 14 is connected to the second coupling output end.
The first coupling output end is used for outputting coupled transmitted radio frequency signals, the second coupling output end is used for outputting coupled reflected radio frequency signals, and the first isolation end and the second isolation degree are used for isolating the radio frequency signals.
In particular, the coupling device 10 further comprises a tuner (not shown) disposed on the printed circuit board 12 for adjusting the electromagnetic field distribution within the coupling cavity 111.
The radio frequency signal generated by the coaxial transmission line 11 is an electromagnetic radio frequency signal, and the first coupling body 13 and the second coupling body 14 perform coupling sampling on the radio frequency signal, which is actually performing coupling sampling on the electromagnetic radio frequency signal, wherein the coupling radio frequency signal mainly affecting the first coupling body 13 and the second coupling body 14 is an electric field. The tuner can adjust the electromagnetic field distribution in the coupling cavity 111, that is, the tuner can change the electric field vector and the intensity in the coupling cavity 111, so that the coupling amount of the electric field coupled to different positions on the first coupling body 13 and the second coupling body 14 is different from the phase of the radio frequency signal, and the coupling of the first coupling body 13 and the second coupling body 14 is further adjusted.
In particular, the tuner may include a nut and a tuning screw. More specifically, the second surface 122 of the printed circuit board 12 is provided with a through hole, a nut is disposed at the through hole, and a tuning screw is screwed to the nut, and one end of the tuning screw extends into the coupling cavity 111 through the through hole. When tuning by the tuner is desired, tuning can be achieved by turning the tuning screw to change the depth of one end of the tuning screw in the coupling cavity 111.
By tuning the tuner, the powers of the rf signals coupled to the first coupling body 13 at the first isolation end cancel each other out, the power of the rf signal output by the first isolation end reaches the minimum, i.e., the isolation is the maximum, and the same is true for the rf signal coupled to the second coupling body 14.
Specifically, a first fixed load is disposed between the first isolation end and the first coupling body 13, a second fixed load is disposed between the second isolation end and the second coupling body 14, and the first fixed load and the second fixed load are disposed on the second surface 122 of the printed circuit board 12. The first load and the second load can absorb the residual radio frequency signal power, and have the effect of impedance matching, so that the requirement of the isolation degree of the coupling device 10 is met.
The embodiment at least has the following beneficial effects: in the coupling device 10 of this embodiment, the first coupling body 13 is disposed in the first coupling cavity 1111, the second coupling body 14 is disposed in the second coupling cavity 1112, and the first coupling body 13 and the second coupling body 14 are disposed in parallel along the axis of the coaxial transmission line 11, so that the setting length of the coupling device 10 can be shortened, the filter has a larger filtering area in the same cavity space, and the overall filtering performance of the filter can be optimized.
The present application further provides a filter 20, the filter 20 comprising a cavity and the coupling device 10 as in the previous embodiments, the coupling device 10 being disposed in the cavity of the filter 20. Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of the filter 20 of the present application.
As shown in fig. 4, the filter 20 includes a housing (not shown) and a cavity disposed in the housing, and the cavity is divided into a non-filtering area a1 and a filtering area a 2. The coupling device 10 is arranged in a cavity, in fig. 4 schematically showing a coaxial transmission line 11 and a first and a second coupling body 13, 14.
The first coupling body 13 and the second coupling body 14 are disposed along a radial direction S of the coaxial transmission line 11.
Therefore, the first coupling body 13 and the second coupling body 14 of the coupling device 10 of the filter 20 provided by the present application are arranged in parallel along the radial direction S of the coaxial transmission line 11, so that the arrangement length of the coupling device 10 is shortened, and the filter 20 has a larger filtering area a2 in the same cavity space, thereby optimizing the overall filtering performance of the filter 20.
The present application further provides a communication device, which includes the coupling device 10 as described in the above embodiment, one end of the coaxial transmission line 11 of the coupling device 10 is connected to the transmitting end and the output end of the filter, the other end of the coaxial transmission line 11 is connected to the antenna through the connector, and the coupling device 10 is used for coupling the radio frequency signal between the transmitting end or the receiving end of the filter and the antenna to detect the power of the antenna.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.
Claims (10)
1. A coupling device disposed within a cavity of a filter, the coupling device comprising:
the coaxial transmission line is used for transmitting signals and is provided with a coupling cavity;
the first surface of the printed circuit board covers the coupling cavity;
the first coupling body and the second coupling body are arranged on the first surface of the printed circuit board, the first coupling body and the second coupling body are arranged along the radial direction of the coaxial transmission line in parallel, and the first coupling body and the second coupling body are coupled to sample the signals.
2. The coupling device of claim 1,
the coupling cavity comprises a first coupling cavity and a second coupling cavity, the first coupling body is arranged in the first coupling cavity, and the second coupling body is arranged in the second coupling cavity.
3. The coupling device of claim 2,
the coaxial transmission line is provided with a first window and a second window, the first window is located in the first coupling cavity, the first coupling body is coupled with the signal through the first window, the second window is arranged in the second coupling cavity, and the second coupling body is coupled with the signal through the second window.
4. The coupling device of claim 1,
the first coupling body and the second coupling body are microstrip lines, the signal comprises a transmitting signal and a reflecting signal, the first coupling body is used for coupling the transmitting signal, and the second coupling body is used for coupling the reflecting signal.
5. The coupling device of claim 1,
the second surface of the printed circuit board is provided with a first isolation end, a first coupling output end, a second isolation end and a second coupling output end, one end of the first coupling body is connected with the first isolation end, and the other end of the first coupling body is connected with the first coupling output end;
one end of the second coupling body is connected with the second isolation end, and the other end of the second coupling body is connected with the second coupling output end; the second surface is opposite to the first surface.
6. The coupling device of claim 5,
first isolation end with be provided with first fixed load between the first coupling body, second isolation end with be provided with second fixed load between the second coupling body, first fixed load and second fixed load set up in printed circuit board's second surface.
7. The coupling device of claim 1,
the coupling device further comprises a tuner, wherein the tuner is arranged on the printed circuit board and is used for adjusting the electromagnetic field distribution in the coupling cavity.
8. The coupling device of claim 1,
the coaxial transmission line comprises a connecting rod, a cavity and a medium, wherein the connecting rod and the medium are arranged in the cavity, and the medium is positioned between the cavity and the connecting rod.
9. A filter comprising a cavity and a coupling device according to any of claims 1-8, the coupling device being arranged in the cavity.
10. A communication device, characterized in that it comprises a coupling device according to any of claims 1-8, one end of the coaxial transmission line of which is connected to the transmitting end of the filter and to the output, and the other end of which is connected to the antenna by means of a connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021833739.8U CN212991279U (en) | 2020-08-27 | 2020-08-27 | Coupling device, filter and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021833739.8U CN212991279U (en) | 2020-08-27 | 2020-08-27 | Coupling device, filter and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212991279U true CN212991279U (en) | 2021-04-16 |
Family
ID=75435432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021833739.8U Active CN212991279U (en) | 2020-08-27 | 2020-08-27 | Coupling device, filter and communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212991279U (en) |
-
2020
- 2020-08-27 CN CN202021833739.8U patent/CN212991279U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104753468A (en) | Millimeter-wave even harmonic mixer structure | |
| CN103811832B (en) | Filter, receiver, transmitter and transceiver | |
| CN103633400A (en) | Electromagnetic hybrid coupling-based micro-strip duplexer | |
| CN103760415B (en) | Strong-flow compact type circular accelerator tuning loop phase detection method | |
| CN101789764A (en) | Radio frequency power amplifier | |
| CN109361045B (en) | Miniaturized broadband high-power coupler | |
| CN212991279U (en) | Coupling device, filter and communication equipment | |
| CN107689473B (en) | Waveguide detection unit of magnetic excitation coupling mechanism | |
| CN103501204B (en) | A kind of X-band power output telemetry-acquisition device | |
| CN205082056U (en) | HF link and one -piece type daughter board of ordinary circuit | |
| CN106961285A (en) | A kind of scatter communication high-frequency apparatus of full frequency band work | |
| CN205723901U (en) | A kind of L-band microstrip directional coupler circuit | |
| CN110048739B (en) | Radio frequency transceiver circuit | |
| CN104393379A (en) | Dual-frequency bandwidth band elimination filter based on loading structure of multi-step impendence resonators | |
| CN108461880A (en) | A kind of NEW TYPE OF COMPOSITE transmission line | |
| CN209897037U (en) | Combining and splitting circuit structure of output port of receiver | |
| CN201185220Y (en) | Filter | |
| EP0560503A1 (en) | Electrical filter | |
| EP3026441A1 (en) | Apparatus for measuring RF power and associated methods | |
| CN206922743U (en) | Integrated Ka wave band antennas front end | |
| CN105226353A (en) | Coaxial cavity filter | |
| CN201490989U (en) | 225 MHz-512 MHz 100W ultra-high power co-address filter | |
| CN213990664U (en) | Impedance adjusting circuit, coupling circuit and 5G communication system | |
| CN204732505U (en) | For the capacitive coupling structure of metallic cavity filter product | |
| CN213547467U (en) | Power dividing circuit, radio frequency device and communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |