CN206134902U - Coaxial microstrip structure of radio frequency - Google Patents
Coaxial microstrip structure of radio frequency Download PDFInfo
- Publication number
- CN206134902U CN206134902U CN201621043420.9U CN201621043420U CN206134902U CN 206134902 U CN206134902 U CN 206134902U CN 201621043420 U CN201621043420 U CN 201621043420U CN 206134902 U CN206134902 U CN 206134902U
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- China
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- pcb board
- coaxial
- radio frequency
- connecting portion
- transition structure
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Abstract
The utility model discloses a coaxial microstrip structure of radio frequency, including coaxial outer conductor, coaxial inner conductor and PCB board, be equipped with the microstrip line on the PCB board, still be equipped with the transition structure on the PCB board, the transition structure includes first connecting portion and second connecting portion, coaxial inner conductor is connected to first connecting portion, the microstrip line is connected to the second connecting portion. Do not use the RF connector, establish a transition structure between coaxial inner conductor and microstrip line, effectively reduce test cost and processing procedure, can be used in electronics, the RF who substitutes on the PCB board walks the line, reduce the inside radio frequency interference of PCB board.
Description
Technical field
This utility model is related to radio frequency coaxial microband interconnection technique field, more particularly to a kind of radio frequency coaxial microband structure.
Background technology
Radio frequency coaxial microband connector is simple to operate due to which, it is easy to safeguard, superior electrical property, particularly in limited space
Occasion using it is flexible the features such as, be widely used in the fields such as optical communication equipment, measuring apparatus, wireless device, radio-frequency module.Penetrate
Frequency coaxial microband connector plays the radio signal transmission effect of key, and it is the exclusive path for connecting antenna and mainboard, so
Key factor of the standing-wave ratio of connected mode into constraint radiofrequency signal quality, the quality of its radio frequency parameter at coaxial line and mainboard
Sensitivity of the meeting overlaying influence to antenna system, thus it is anti-in order to reduce the connection between different transmission lines in actual applications
Penetrate, special adapter can be used, which is relatively costly.
Utility model content
Technical problem to be solved in the utility model is：A kind of radio frequency for not using radio frequency coaxial microband connector is provided
Coaxial microband structure.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of radio frequency coaxial microband structure,
Including coaxial outer conductor, coaxial inner conductor and pcb board, the pcb board is provided with microstrip line, is additionally provided with transition on the pcb board
Structure, the transition structure include first connecting portion and second connecting portion, and the first connecting portion connects coaxial inner conductor, described
Second connecting portion connects microstrip line.
Further, the transition structure is square.
Further, the transition structure is T-shaped.
Further, the coaxial inner conductor is welded on the first connecting portion.
Further, the coaxial outer conductor is welded on the pcb board.
Further, the pcb board is double-layer PCB board, and top layer and bottom copper thickness are 1Oz.
The beneficial effects of the utility model are：RF adapters are not used, one is set between coaxial inner conductor and microstrip line
Transition structure, effectively reduces testing cost and processing procedure, it is also possible in electronicss, substitutes the RF cablings on pcb board, drop
The internal radio frequency interference of low pcb board.
Description of the drawings
Fig. 1 is this utility model radio frequency coaxial microband structural perspective；
Fig. 2 is this utility model radio frequency coaxial microband structure top view 1；
Fig. 3 is one T-shaped transition structure S parameter return loss test result figure of this utility model embodiment；
Fig. 4 is one T-shaped transition structure S parameter insertion loss test result figure of this utility model embodiment；
Fig. 5 is one T-shaped transition structure standing-wave ratio VSWR performance diagram of this utility model embodiment；
Fig. 6 is one T-shaped transition structure TDR Impedance performance diagrams of this utility model embodiment；
Fig. 7 is this utility model radio frequency coaxial microband structure top view 2；
Fig. 8 is two square transition structure standing-wave ratio VSWR performance diagram of this utility model embodiment；
Fig. 9 is two square transition structure TDR Impedance performance diagrams of this utility model embodiment；
Label declaration：
1st, coaxial feed；2nd, coaxial outer conductor；3rd, coaxial inner conductor；4th, pcb board；5th, microstrip line；6th, transition structure；7th,
One connecting portion；8th, second connecting portion；9th, RF adapters.
Specific embodiment
By describing technology contents of the present utility model in detail, realizing purpose and effect, below in conjunction with embodiment and match somebody with somebody
Close accompanying drawing to be explained.
The design of this utility model most critical is：A transition structure is set between coaxial inner conductor and microstrip line, is not made
RF adapters are used, testing cost and processing procedure can be effectively reduced.
Refer to Fig. 1, Fig. 2 and Fig. 7, a kind of radio frequency coaxial microband structure, including coaxial outer conductor, coaxial inner conductor and
Pcb board, the pcb board are provided with microstrip line, and transition structure is additionally provided with the pcb board, and the transition structure includes the first company
Socket part and second connecting portion, the first connecting portion connect coaxial inner conductor, and the second connecting portion connects microstrip line.
Knowable to foregoing description, the beneficial effects of the utility model are：Do not use RF adapters, in coaxial inner conductor and
A transition structure is set between microstrip line, testing cost and processing procedure can be effectively reduced, it is also possible in electronicss, is substituted
RF cablings on pcb board, reduce the internal radio frequency interference of pcb board.
Further, the transition structure is square.
Further, the transition structure is T-shaped.
Seen from the above description, transition structure may be designed as square or T-shaped, when transition structure is T-shaped, can increase
Holding wire and the compatibility of return path, effectively reduce the impedance of transitional region.
Further, the coaxial inner conductor is welded on the first connecting portion.
Seen from the above description, coaxial inner conductor can be directly welded in transition structure, it is not necessary to using special connection
Device.
Further, the coaxial outer conductor is welded on the pcb board.
Further, the pcb board is double-layer PCB board, and top layer and bottom copper thickness are 1Oz.
Embodiment one
Fig. 1 to Fig. 6 is refer to, embodiment of the present utility model is：As shown in figure 1, a kind of radio frequency coaxial microband structure,
Including coaxial feed 1 and pcb board 4.As shown in Fig. 2 the coaxial feed 1 includes coaxial outer conductor 2 and coaxial inner conductor 3, institute
State pcb board 4 and be provided with microstrip line 5, on the pcb board 4, be additionally provided with transition structure 6, the transition structure 6 includes first connecting portion
7 and second connecting portion 8, the connection coaxial inner conductor 3 of the first connecting portion 7, the connection microstrip line 5 of the second connecting portion 8, micro-strip
The male of the other end connection RF adapters 9 of line 5.Transition structure 6 described in the present embodiment be T-shaped, the small end head of T-type structure
Connect with microstrip line 5, coaxial inner conductor 3 is directly welded in the first connecting portion 7, and coaxial outer conductor is directly welded at PCB
On plate 4.The size of pcb board 4 is 8mm*8mm*0.6mm, and base material is common FR4, and dielectric constant is 4.2, and loss tangent angle is
0.016, the copper thickness of top layer and bottom is 1Oz.The present embodiment is to complete 1 turn of microstrip line 5 of coaxial feed by double-layer PCB board 4
The transition of 9 male of RF adapters is arrived again.
In the present embodiment, dependence test is carried out to the performance of this T-shaped transition structure, as shown in figure 3, being the present embodiment
S parameter return loss test result, it can be seen that when frequency range is 0-6GHz, S11 and S22 reach -17dB with
Under, there is preferable return loss.As shown in figure 4, being the present embodiment insertion loss test result, S21 and S12 is in -0.25 model
In enclosing, there is preferable insertion loss.As shown in figure 5, being standing-wave ratio VSWR characteristic curve, the maximum in 6GHz is
1.45 0-6GHz of specification Max VSWR of 1.3203, far smaller than RF cable, can be seen that this T-shaped mistake from standing wave ratio characteristic
Cross reflection when significantly reducing coaxial access pcb board 4.TDR Impedance characteristic curves are illustrated in figure 6, coaxially
When feed 1 proceeds to pcb board 4, impedance when thinner coaxial inner conductor 3 is welded direct on the cabling pad of pcb board 4 is higher,
Increase transition structure 6, increase the compatibility of holding wire and return path, significantly reduce the impedance of transitional region so as to
Stablize below 50 ohm, the impedance of minimum point in figure is the impedance at RF adapters 9, and it is to avoid that its impedance operator is less
, which meets the Property Specification of 50+/- 5Ohm.In the present embodiment, the size of transition structure 6 is by the big of 9 male of RF adapters
Little decision.
Embodiment two
Fig. 7 to Fig. 9 is refer to, is that the difference of embodiment of the present utility model two, embodiment two and embodiment one exists
In as shown in fig. 7, transition structure 6 is square in the present embodiment.The present embodiment standing-wave ratio VSWR characteristic curve is illustrated in figure 8,
Which is 1.70 in 0-6GHz maximums, slightly larger than the specification of set maximum 1.45, as shown in figure 8, being TDR Impedance
Characteristic curve, can see that impedance is raised in transition rapidly from figure, and impedance matching is good not as T-shaped transition structure.
Comparative example one and embodiment two, the impedance of the impedance matching of T-shaped transition structure than square transition structure
It is good with property, with more preferable actual application value.Its reason be transition junction resistance value Z be about √ L/C, L mainly by by
The diameter of coaxial inner conductor is determined, it is impossible to changed again；Holding wire and signal return path of the transition point electric capacity C by welding position
The area that is parallel to each other determines that distance is nearer bigger with parallel area can be effectively increased electric capacity C.Herein due to coaxial inner conductor
Diameter has just started bending part from GND farther out, so its L is larger, increasing T-shaped transition structure is effectively increased C, it is ensured that Z heres
50 ohm of matchings at place.Square transition structure simply ensure that the impedance of 50 ohm inside pcb board of microstrip line, without examining
Consider, so the meeting 50 ohm of big impedances of producing ratio of square transition structure, its
Impedance matching can be poor.
In sum, a kind of radio frequency coaxial microband structure that this utility model is provided, including coaxial outer conductor, it is coaxial in lead
Body and pcb board, the pcb board are provided with microstrip line, and transition structure is additionally provided with the pcb board, and the transition structure includes
One connecting portion and second connecting portion, the first connecting portion connect coaxial inner conductor, and the second connecting portion connects microstrip line.No
Using RF adapters, a transition structure is set between coaxial inner conductor and microstrip line, effectively reduce testing cost and processing procedure, can use
In electronicss, the RF cablings on pcb board are substituted, reduce the internal radio frequency interference of pcb board；The shape of transition structure can
Be designed as needed, when for T-shaped when, its impedance matching is better than square transition structure.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalents made using this utility model description and accompanying drawing content, or directly or indirectly it is used in the technology neck of correlation
Domain, is included in scope of patent protection of the present utility model in the same manner.
Claims (6)
1. a kind of radio frequency coaxial microband structure, including coaxial outer conductor, coaxial inner conductor and pcb board, the pcb board are provided with micro-
Band wire, it is characterised in that transition structure is additionally provided with the pcb board, the transition structure includes that first connecting portion and second connects
Socket part, the first connecting portion connect coaxial inner conductor, and the second connecting portion connects microstrip line.
2. radio frequency coaxial microband structure according to claim 1, it is characterised in that the transition structure is square.
3. radio frequency coaxial microband structure according to claim 1, it is characterised in that the transition structure is T-shaped.
4. the radio frequency coaxial microband structure according to any one of claims 1 to 3, it is characterised in that the coaxial inner conductor
It is welded on the first connecting portion.
5. the radio frequency coaxial microband structure according to any one of claims 1 to 3, it is characterised in that the coaxial outer conductor
It is welded on the pcb board.
6. the radio frequency coaxial microband structure according to any one of claims 1 to 3, it is characterised in that the pcb board is bilayer
Pcb board, top layer and bottom copper thickness are 1Oz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621043420.9U CN206134902U (en) | 2016-09-06 | 2016-09-06 | Coaxial microstrip structure of radio frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621043420.9U CN206134902U (en) | 2016-09-06 | 2016-09-06 | Coaxial microstrip structure of radio frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206134902U true CN206134902U (en) | 2017-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621043420.9U Active CN206134902U (en) | 2016-09-06 | 2016-09-06 | Coaxial microstrip structure of radio frequency |
Country Status (1)
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| CN (1) | CN206134902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252808A (en) * | 2016-09-06 | 2016-12-21 | 深圳市信维通信股份有限公司 | A kind of radio frequency coaxial microband structure |
-
2016
- 2016-09-06 CN CN201621043420.9U patent/CN206134902U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252808A (en) * | 2016-09-06 | 2016-12-21 | 深圳市信维通信股份有限公司 | A kind of radio frequency coaxial microband structure |
| CN106252808B (en) * | 2016-09-06 | 2022-05-27 | 深圳市信维通信股份有限公司 | Radio frequency coaxial microstrip structure |
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