CN110994111A - Standing wave detection board - Google Patents
Standing wave detection board Download PDFInfo
- Publication number
- CN110994111A CN110994111A CN201911414781.8A CN201911414781A CN110994111A CN 110994111 A CN110994111 A CN 110994111A CN 201911414781 A CN201911414781 A CN 201911414781A CN 110994111 A CN110994111 A CN 110994111A
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- China
- Prior art keywords
- coupling
- standing wave
- line
- pcb
- wave detection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The embodiment of the application discloses a standing wave detection board for filter antenna end interface department includes: the PCB comprises a PCB main board, a coupling assembly and a strip transmission line; wherein the strip transmission line is used for transmitting radio frequency signals; the coupling assembly and the strip line are respectively and fixedly connected with the PCB mainboard, and a coupling relation exists between the coupling assembly and the strip transmission line; the coupling microstrip generates a coupling signal corresponding to the radio frequency signal through the coupling relation; the coupling assembly includes: the coupling microstrip, the isolation line and the coupling output line; one end of the coupling microstrip is connected with the coupling output line, and the coupling output line is used for outputting the coupling signal; the other end of the coupling microstrip is connected with the isolation line, and the isolation line is used for being connected with the ground.
Description
Technical Field
The embodiment of the application relates to the field of communication, in particular to a standing wave detection plate.
Background
In the theory of electronics, an alternating current passes through a conductor, and an alternating electromagnetic field, called an electromagnetic wave, is formed around the conductor. When the frequency of the electromagnetic wave is higher than 100 kilohertz (kHz), the electromagnetic wave can be propagated in the air and reflected by the ionosphere at the outer edge of the atmosphere to form a long-distance transmission capability, and such a high-frequency electromagnetic wave with the long-distance transmission capability is called a radio frequency signal. Radio frequency communication, namely, information transmission by using radio frequency signals, is a wireless communication mode. The radio frequency signal has the attribute parameters of frequency, power, bandwidth and the like.
In a radio frequency communication system, a signal transmission main rod for transmitting radio frequency signals needs to be monitored, and the monitoring process is generally completed by a coupling component integrated on a standing wave detection plate. The coupling component and the signal transmission main rod for transmitting the radio frequency signal form a space coupling relation. The coupling assembly acquires a coupling signal corresponding to the radio-frequency signal through the coupling relation, and detects the performance states of the antenna and the equipment connected with the signal transmission main rod according to parameters such as power of the coupling signal.
In the assembling process, the signal transmission main rod and the standing wave detection plate are independently installed respectively, the distance between the signal transmission main rod and the coupling component on the standing wave detection plate has large influence on the detection result, and the installation accuracy requirement on the signal transmission main rod and the standing wave detection plate is high.
Disclosure of Invention
The first aspect of the embodiments of the present application provides a standing wave detection board, including: the PCB comprises a PCB main board, a coupling assembly and a strip line; wherein the strip line is used for transmitting radio frequency signals;
the coupling assembly and the strip line are respectively and fixedly connected with the PCB mainboard, and a coupling relation exists between the coupling assembly and the strip line; the coupling microstrip generates a coupling signal corresponding to the radio frequency signal through the coupling relation;
the coupling assembly includes: the coupling microstrip, the isolation line and the coupling output line;
one end of the coupling microstrip is connected with the coupling output line, and the coupling output line is used for outputting the coupling signal;
the other end of the coupling microstrip is connected with the isolation line, and the isolation line is used for being connected with the ground.
Based on the first aspect of the embodiment of the present application, optionally, the stripline is located on an upper surface of the PCB main board.
Based on the first aspect of the embodiments of the present application, optionally, the strip line is formed by a multilayer PCB board.
Based on the first aspect of the embodiment of the present application, optionally, the multiple layers of PCB boards are connected by a copper via.
Based on the first aspect of the embodiment of the present application, optionally, the multilayer PCB is made of an epoxy glass cloth laminated board.
Based on the first aspect of the embodiment of the present application, optionally, a coupling distance between the stripline and the coupling microstrip is 1.5 mm.
Based on the first aspect of the embodiment of the present application, optionally, cuboid hollow-out regions with widths equal to the coupling distance length and the length of the strip line exist on two sides of the position of the strip line on the PCB.
Based on the first aspect of the embodiment of the present application, optionally, one end of the strip line is connected to the cavity filter resonant cavity, and the other end of the strip line is connected to the antenna interface.
Based on the first aspect of the embodiment of the present application, optionally, the PCB main board is made of an epoxy glass cloth laminated board.
Based on the first aspect of the embodiment of the present application, optionally, the coupling microstrip is a rectangular copper sheet.
According to the technical scheme, the embodiment of the application has the following advantages: the stripline replaces the original signal transmission main rod structure, is fixedly connected with the standing wave detection plate, can avoid the installation distance error between the stripline and the standing wave detection plate when being installed, improves the reliability of the equipment, and reduces the cost of the equipment.
Drawings
FIG. 1 is a schematic structural diagram of a prior art corresponding to the present application;
fig. 2 is a schematic structural diagram of an embodiment of the standing wave detection plate of the present application.
Detailed Description
In the theory of electronics, an alternating current passes through a conductor, and an alternating electromagnetic field, called an electromagnetic wave, is formed around the conductor. When the frequency of the electromagnetic wave is higher than 100 khz, the electromagnetic wave can propagate in the air and be reflected by an ionosphere at the outer edge of the atmosphere to form a long-distance transmission capability, and the high-frequency electromagnetic wave with the long-distance transmission capability is called a radio frequency signal. Radio frequency communication, namely, information transmission by using radio frequency signals, is a wireless communication mode. The radio frequency signal has the attribute parameters of frequency, power, bandwidth and the like.
In a radio frequency communication system, an antenna for transmitting a radio frequency signal needs to be monitored, and the monitoring process is generally completed by a coupling component integrated on a standing wave detection plate. The coupling assembly forms a spatial coupling relationship with an antenna that transmits radio frequency signals. The coupling component acquires a coupling signal corresponding to the radio frequency signal through the coupling relation, and detects the performance state of the antenna and the equipment connected with the antenna according to parameters such as power of the coupling signal.
Referring to fig. 1, the coupling structure for realizing coupling detection in the filter currently used includes: a coupling microstrip 102, a coupling output strip 103 and an isolation strip 104, and a signal transmission main rod (here, a metal main rod is used as the signal transmission rod 101) 101 which is coupled with the coupling structure. The coupling structure is integrated on the standing wave detection plate, the standing wave detection plate is a PCB mainboard comprising the coupling structure, and the standing wave detection plate generally comprises not only the coupling component but also a detection circuit connected with the coupling component. And may also include multiple sets of coupling and detection components, not specifically limited herein.
When radio frequency signal transmission exists on the signal transmission main rod 101, a corresponding coupling signal can be generated on the coupling microstrip, the coupling signal is transmitted to the detection circuit through the coupling output line, and the detection circuit analyzes data such as power of the coupling signal. When the equipment is abnormal, the power value of the coupling signal generated by the directional coupler is changed, and the detection circuit connected with the directional coupler can judge the system is abnormal in time after detecting the information, report an alarm and close the equipment, thereby protecting the equipment. The directional coupler therefore plays an important role in the monitoring of the system.
In the existing installation process of a coupling structure, a main rod and a standing wave detection plate which are coupled with each other are independently installed respectively, a metal main rod needs to be welded and assembled, one end of the metal main rod is connected with an antenna port joint, the other end of the metal main rod is connected with a resonant cavity, different direction offsets such as up, down, left and right directions are always generated in the welding process, so that an error exists between the distance from a coupling microstrip to the metal main rod and the design distance, the error range is different from 0.1 mm to 0.5 mm, and the small deviation has great influence on the coupling degree and the isolation degree. If an error exists in the installation process, the coupling output line and the isolation line are required to be debugged and matched again to make up for the error. Resulting in increased equipment production costs and affecting the service life of the equipment.
To this problem, this application changes the mode of using metal mobile jib transmission radio frequency signal before, replaces with PCB's stripline, provides the standing wave pick-up plate design of this transmission line of integration to coupling subassembly to reach the effect of stripline and standing wave pick-up plate integration.
Referring to fig. 2, the standing wave detection plate includes: PCB motherboard 200, stripline 201, and coupling components (coupling microstrip 202, coupling out line 203, and isolation line 204). Wherein the strip line is used for transmitting radio frequency signals.
The PCB mainboard is the main part component part of standing wave pick-up plate, and stripline and coupling component all set up on the PCB mainboard, and with PCB mainboard fixed connection, can additionally set up on the PCB mainboard components such as detection circuitry that are connected with the coupling component, and concrete here does not limit.
The stripline is used for transmitting radio frequency signals, taking the standing wave detection plate used for the filter device as an example, one end of the stripline is connected with the cavity filter resonant cavity, and the other end of the stripline is connected with the antenna interface, so that the transmission task of the radio frequency signals is completed. The strip line is fixedly connected with the PCB main board, the specific form can be that the strip line is in the PCB main board or on the upper surface of the PCB main board, and the strip line can be flexibly selected according to the actual use condition, and the specific form is not limited here.
The coupling element portion is similar to the coupling element portion used in the conventional standing wave detection plate, and includes: coupling microstrip 202, coupling output line 203, and isolation line 204.
The coupling microstrip and the strip line form a coupling relation, and it is noted that after the strip line is fixed on the upper surface or inside of the PCB main board, the position of the coupling microstrip changes correspondingly, specifically, when the coupling microstrip is in the form of a metal copper sheet, the surface of the copper sheet can be arranged perpendicular to the board surface of the PCB main board, that is, the coupling microstrip copper sheet is arranged in the thickness direction of the PCB main board or arranged at a certain angle to the board surface of the PCB main board, only a certain coupling distance is required to be kept between the coupling microstrip and the strip line so as to generate a coupling signal in the coupling microstrip, and the coupling microstrip, the coupling output strip and the isolation strip are connected for outputting the coupling signal while completing the coupling relation, so that no special requirements exist for the characteristics of the form, the size and the like of the coupling output strip and the isolation strip. The coupling output line is used for outputting the coupling signal, and the isolation line is used for being connected with the ground. The specific form of the coupling output line and the isolation line can be specifically set according to parameters such as impedance of the strip line, and the like, and is not limited herein.
According to the technical scheme, the embodiment of the application has the following advantages: the stripline replaces the original signal transmission main rod structure, and the stripline is fixedly connected with the standing wave detection plate, so that the installation distance error between the signal transmission main rod and the standing wave detection plate can be avoided during installation, the reliability of the equipment is improved, and the cost of the equipment is reduced.
On the basis of the structure of the standing wave detection board in the embodiment, some alternatives in the implementation process of the scheme are respectively described as follows:
in a first aspect, referring to fig. 2, the strip line is located on the upper surface of the PCB main board and is formed by multiple layers of PCBs, the multiple layers of PCBs are connected by copper vias, and the strip line and the PCB main board are made of epoxy glass fabric laminated boards. This material is light and stable in nature, and the security is high, selects same material to make being connected between stripline and the PCB mainboard more stable. The strip line obtained through the setting of the conditions is low in insertion loss and firm in connection with the PCB main board, low in cost and easy to achieve.
In the second aspect, rectangular hollow areas 301 with the width being the same as the length of the strip line as the coupling distance length exist on two sides of the position of the strip line on the PCB. The coupling distance between the strip line and the coupling microstrip is 1.5 mm. The PCB mainboard is provided with the hollow area which is consistent with the coupling distance, so that the coupling relation between the strip line and the coupling component can be ensured, the material usage amount of the standing wave detection plate is reduced, the whole weight of the equipment is reduced, and the cost is saved.
It should be noted that the above description of specific dimensions of the standing wave detection plate is only an example for easy understanding, and should not be limited in practical implementation.
The above description of the present application with reference to specific embodiments is not intended to limit the present application to these embodiments. For those skilled in the art to which the present application pertains, several changes and substitutions may be made without departing from the spirit of the present application, and these changes and substitutions should be considered to fall within the scope of the present application.
Claims (10)
1. A standing wave detection panel, comprising: the PCB comprises a PCB main board, a coupling assembly and a strip line; wherein the strip line is used for transmitting radio frequency signals;
the coupling assembly and the strip line are respectively and fixedly connected with the PCB mainboard, and a coupling relation exists between the coupling assembly and the strip line; the coupling microstrip generates a coupling signal corresponding to the radio frequency signal through the coupling relation;
the coupling assembly includes: the coupling microstrip, the isolation line and the coupling output line;
one end of the coupling microstrip is connected with the coupling output line, and the coupling output line is used for outputting the coupling signal;
the other end of the coupling microstrip is connected with the isolation line, and the isolation line is used for being connected with the ground.
2. The standing wave pickup plate according to claim 1, wherein the striplines are located on an upper surface of the PCB main board.
3. The standing wave detection plate according to claim 1, wherein the strip line is formed of a multilayer PCB board.
4. The standing wave detection plate according to claim 2, wherein the multiple layers of PCB plates are connected by copper through holes.
5. The standing wave detection plate according to claim 2, wherein the multilayer PCB plate is an epoxy glass cloth laminated plate material.
6. The standing wave detection plate according to claim 1, wherein a coupling distance between the stripline and the coupling microstrip is 1.5 mm.
7. The standing wave detection plate according to claim 1, wherein a rectangular hollow area having a width of a coupling distance length equal to a length of the strip line is present on both sides of a position of the strip line on the PCB.
8. The standing wave detector plate of claim 1, wherein one end of the stripline is connected to the cavity filter resonant cavity and the other end is connected to the antenna interface.
9. The standing wave detection plate according to claim 1, wherein the PCB main plate is made of epoxy glass cloth laminated plate material.
10. The standing wave detection plate according to claim 1, wherein the coupling microstrip is a rectangular sheet made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911414781.8A CN110994111A (en) | 2019-12-31 | 2019-12-31 | Standing wave detection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911414781.8A CN110994111A (en) | 2019-12-31 | 2019-12-31 | Standing wave detection board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110994111A true CN110994111A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911414781.8A Pending CN110994111A (en) | 2019-12-31 | 2019-12-31 | Standing wave detection board |
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| CN (1) | CN110994111A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279832A1 (en) * | 2021-07-08 | 2023-01-12 | Oppo广东移动通信有限公司 | Microstrip coupler, pcb, radio frequency system, and communication device |
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2019
- 2019-12-31 CN CN201911414781.8A patent/CN110994111A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279832A1 (en) * | 2021-07-08 | 2023-01-12 | Oppo广东移动通信有限公司 | Microstrip coupler, pcb, radio frequency system, and communication device |
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