CN203205517U - Fixed directional coupler - Google Patents
Fixed directional coupler Download PDFInfo
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- CN203205517U CN203205517U CN 201320063308 CN201320063308U CN203205517U CN 203205517 U CN203205517 U CN 203205517U CN 201320063308 CN201320063308 CN 201320063308 CN 201320063308 U CN201320063308 U CN 201320063308U CN 203205517 U CN203205517 U CN 203205517U
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Abstract
The utility model discloses a fixed directional coupler. According to the fixed directional coupler, an external conductor of a coaxial feed pipe is provided with coupling seats used for fixing coupling heads; each coupling seat is provided with a cavity; the external conductor of the coaxial feed pipe is provided with through holes which are communicated with the cavity; each coupling head includes a fixed plate and a coupling box which are disposed below the fixed plate; each fixed plate is provided with a coupling signal output interface; each coupling box is disposed in the cavity in the coupling seat; an adjustable coupling circuit is disposed in each coupling box; a coupling plate is disposed at the bottom of each coupling box; a coupling ring is disposed below each coupling plate, and one end of the coupling ring is connected with a load resistor while the other end of the coupling ring is electrically connected with the output interfaces. The fixed directional coupler helps to effectively solve problems which may affect normal operation of transmission equipment due to changes easily occur in coupling signals in directional couplers in the prior art. The fixed directional coupler is small in structural size, stable in coupling signals and low in cost, and has very high practical value.
Description
Technical field
The utility model relates to a kind of coupler, the fixed directional coupler that especially a kind of radio and television transmitter is used.
Background technology
Four port organizations that directional coupler is made up of main signal line and coupling signal wire, power division, the power that is used for high-frequency circuit is synthetic, power detection etc., its operation principle is when the AC signal that definite direction is arranged on the main signal line is propagated, because the parasitic capacitance between main signal line and the coupling signal wire and the effect of stray inductance also have the AC signal of determining direction on the coupling signal wire.The directional coupler that is used for input on the radio and television transmitter is a kind of coupler of the low degree of coupling, such directional coupler of prior art adopts the version that installs coupling head on the main feed pipe additional usually, in order to make degree of coupling size adjusted, insertion depth and the angle of prior art coupling head are adjustable structure.This structure has a plurality of shortcomings, and the one, volume is big, the complex structure cost is higher; The 2nd, coupling head is given a shock loosening easily, makes that changing significantly appears in coupled signal, and is difficult to return to the home position after loosening; The 3rd, be the insertion depth of coupling head when more shallow when the degree of coupling is less, the directivity index of directional coupler will decline to a great extent; And two kinds of situations of back all can directly cause system misoperation and influence the operate as normal of transmitter.Open day be that the patent document that June 20, publication number in 2012 are CN102509842A discloses a kind of directional coupler, belong to the electronic circuit technology field, this directional coupler comprises main signal line, coupling signal wire, isolation output line and coupling output line, isolate the two ends that output line and coupling output line are connected to coupling signal wire, coupling signal wire comprises continuous main coupling line and time coupling line, and wherein main coupling line is for generation of main coupled signal; Inferior coupling line is for generation of offseting signal, and the inferior coupled signal that produces on offseting signal and the main coupling line offsets.This structure is mainly used in the design size of the directional coupler that improves microwave band, dwindles the volume of coupler.Open day be that the patent document that November 14, publication number in 2012 are CN202534765U discloses a kind of cavity coupler that can regulate degree of coupling size, belong to the microwave communication field, be specifically related to a kind of cavity coupler that can regulate degree of coupling size, comprise a pair of employing up and down to the pressure mode support the transmission main line and the coupling by-pass insulation strip, this is divided into insulation strip, following insulation strip to insulation strip, and described transmission main line and coupling by-pass are arranged between this upper and lower insulation strip; Described upward insulation strip or following insulation strip are provided with at least one shifting block that is used for adjusting described transmission main line or coupling by-pass position; Have two screws on the sidewall of described cavity coupler cavity one or both sides, described screw is corresponding with described upper and lower insulation strip respectively, in this screw adjusting screw(rod) is housed, adjusting screw(rod) contacts with described upper and lower insulation strip end respectively, is used for promoting this upper and lower insulation strip and moves.Above-mentioned two kinds of couplers only are applicable to microwave band, are not suitable for the radio and television transmitter that is operated in metric wave, decimeter wave wave band.
The utility model content
The problem that influences the transmitter operate as normal appears changing in coupled signal that the utility model exists for the directional coupler that solves prior art easily provides the fixed directional coupler that a kind of volume is little, coupled signal is stable.
The utility model is to reach the concrete technical scheme that above-mentioned technical purpose adopts to be: a kind of fixed directional coupler, comprise coaxial feedback pipe and be arranged on coupling head on the coaxial feedback pipe outer conductor, described outer conductor is provided with the coupling seat for fixing described coupling head, coupling seat is provided with cavity, the outer conductor of coaxial feedback pipe is provided with the through hole that is communicated with described cavity, described coupling head comprises fixed head and is arranged on the couples cartridge of fixed head below, fixed head is provided with the coupled signal output interface, couples cartridge is arranged in the cavity on the coupling seat, be provided with adjustable coupling circuit in the couples cartridge, the bottom of couples cartridge is provided with coupling plate, the below of coupling plate is provided with coupling loop, one end of coupling loop connects load resistance, and the other end is electrically connected with output interface.Coaxial feedback pipe of the present utility model is provided with coupling seat, different with traditional coupling head adjustable structure is, the utility model coupling head directly is fixed on the coupling seat, like this can the position of fixed coupling ring in coaxial feedback pipe, guarantee stability and the consistency of coupled signal, and for the size of coupled signal, then solve by regulating adjustable coupling circuit, like this, loosening and the coupling head of easy appearance that is given a shock that has solved that the directional coupler of prior art exists inserts the directivity difference of coupler when more shallow and causes system misoperation and then influence the problem of transmitter operate as normal, simultaneously, because coupling head adopts fixed structure, therefore its mechanical structure is simplified, and volume dwindles greatly, has reduced production cost.
As preferably, the cross section of coupling seat cavity is rounded, and described couples cartridge is cylindrical, and the length of couples cartridge and the degree of depth of cavity are suitable.Circular configuration is processed easily and is made things convenient for coupling head to rotate 180 degree to satisfy the requirement of coupling incoming signal and reflected signal respectively; The length of couples cartridge enters in the coaxial feedback pipe with the suitable coupling loop that is in the couples cartridge below that then can make of the degree of depth of cavity, the bottom of couples cartridge is used for the through hole on the coaxial feedback pipe outer conductor of sealing simultaneously, be that coaxial feedback pipe keeps structural integrity as far as possible, avoid the structural change of coaxial feedback pipe to influence the accuracy of coupled signal.
As preferably, coupling plate is the printed board that is fixed on couples cartridge bottom opening place, load resistance is welded in the printed board of in a couples cartridge side, coupling loop is located at the downside of printed board, the coupled section of coupling loop is parallel with printed board, passes printed board after the two ends bending of coupled section and links to each other with load resistance and adjustable coupling circuit respectively.Adopt printed board can make things convenient for the setting of coupling loop, load resistance and adjustable coupling circuit.
As preferably, adjustable coupling circuit is signal attenuation circuit or the signal demodulator circuit that is arranged on couples cartridge.Adjustable coupling circuit in the couples cartridge can be signal attenuation circuit, when needing, also the signal demodulator circuit can be set directly in the couples cartridge, the signal demodulator circuit can arrange separately and signalization size adjustment circuit, the setting of also can connecting with signal attenuation circuit.
As preferably, signal attenuation circuit is adjustable attenuator.Directly adopt adjustable attenuator can simplify circuit structure as signal attenuation circuit.
As preferably, fixed head is provided with the Signal Regulation hole, and the adjusting knob of described adjustable attenuator is arranged in the adjustment hole.The size that can regulate coupled signal in the coupling head outside is convenient and swift like this.
As preferably, the signal demodulator circuit is large-signal linear detection circuit or small-signal square-law detection circuit.Can select concrete detecting circuit for use according to concrete needs, to satisfy different requirements, when being used for the power indication, can adopt small-signal square-law detection circuit usually, and when being used for overpower protection, can adopt the large-signal linear detection circuit.
As preferably, coupling seat is cylindrical, and fixed head is rounded, and the coupled signal output interface is Q9-50KF or N-50KF high-frequency socket, and described coupled signal output interface is setovered with respect to the center of circle on circular fixed head.The coupled signal output interface can be from recognizing the coupling direction of coupling head with respect to center of circle biasing at an easy rate on circular fixed head from the outside.
As preferably, coaxial feedback pipe is the coaxial feedback pipe of 1-5/8 inch (41.3mm) or the coaxial feedback pipe of 3-1/8 inch (79.4mm), and the interface at coaxial feedback pipe two ends is coaxial interface or the flange-interface suitable with described coaxial feedback pipe.
The beneficial effects of the utility model are: it has solved effectively that changing appears in coupled signal that the directional coupler of prior art exists easily and the problem that influences the transmitter operate as normal, structural volume of the present utility model is little, coupled signal stable and cost is low, has very high practical value.
Description of drawings
Fig. 1 is a kind of structure cutaway view of the present utility model;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is a kind of structure cutaway view of the utility model coupling head.
Among the figure: 1. outer conductor, 2. coupling head, 3. coupling seat, 4. coaxial feedback pipe, 5. fixed head, 6. couples cartridge, 7. output interface, 8. coupling plate, 9. coupling loop, 10. load resistance, 11. adjustable attenuators, 12. Signal Regulation holes, 13. coaxial interfaces.
Embodiment
Below by embodiment, and by reference to the accompanying drawings the embodiment of technical solutions of the utility model is further described.
In the embodiment shown in Figure 2 as Fig. 11, a kind of fixed directional coupler, comprise coaxial feedback pipe 4 and be arranged on coupling head 2 on the coaxial feedback pipe outer conductor 1, described coaxial feedback pipe is the coaxial feedback pipe of 1-5/8 inch, and the interface at coaxial feedback pipe two ends is 1-5/8 inch coaxial interface 13.The outer conductor of coaxial feedback pipe is provided with the cylindrical coupling seat 3 for fixing described coupling head, coupling seat is provided with the rounded cavity of cross section, the outer conductor of coaxial feedback pipe is provided with the through hole that is communicated with described cavity, the pipe shape couples cartridge 6(that described coupling head comprises circular fixed head 5 and is arranged on fixed head below sees Fig. 3), the length of couples cartridge and the degree of depth of cavity are suitable, fixed head is provided with installing hole, and coupling head is fixed on the coupling seat by screw.Fixed head is provided with coupled signal output interface 7, and the coupled signal output interface is the Q9-50KF high-frequency socket, and described coupled signal output interface arranges with respect to center of circle biasing on circular fixed head.Couples cartridge is arranged in the cavity on the coupling seat, be provided with adjustable coupling circuit in the couples cartridge, the bottom of couples cartridge is provided with coupling plate 8, coupling plate is the printed board that is fixed on couples cartridge bottom opening place, the below of printed board is provided with coupling loop 9, the coupled section of coupling loop is parallel with printed board, passes printed board after the end bending of coupling loop and connects load resistance 10, and load resistance is welded in the printed board of in a couples cartridge side.Passing printed board after the other end bending of coupling loop is electrically connected with output interface by adjustable coupling circuit, described adjustable coupling circuit is the adjustable attenuator 11 that is arranged on couples cartridge, fixed head is provided with Signal Regulation hole 12, and the adjusting knob of described adjustable attenuator is arranged in the adjustment hole.Present embodiment is that coupling head is two, be respectively applied to be coupled incident power signal and reflected power signal, and for the standing-wave protecting circuit of transmitter, the coupling loop direction of two coupling heads is opposite.
Be provided with the signal demodulator circuit in the couples cartridge of embodiment 2 coupling heads; signal demodulator circuit in one of them coupling head is the large-signal linear detection circuit; be used for overpower protection; signal demodulator circuit in another coupling head is small-signal square-law detection circuit; be used to indicate the power output of transmitter; coaxial feedback pipe is the coaxial feedback pipe of 3-1/8 inch, and the interface at coaxial feedback pipe two ends is 3-1/8 inch flange-interface, and all the other are identical with embodiment 1.
In addition to the implementation, according to structural principle of the present utility model, those skilled in the art can use one or more coupling heads to constitute dissimilar directional couplers easily, the utility model can use at the radio and television transmitter of plurality of specifications, has that volume is little, coupled signal is stable and the low characteristics of cost.
Claims (9)
1. fixed directional coupler, comprise coaxial feedback pipe and be arranged on coupling head on the coaxial feedback pipe outer conductor, it is characterized in that: described outer conductor (1) is provided with the coupling seat (3) for fixing described coupling head (2), coupling seat is provided with cavity, the outer conductor of coaxial feedback pipe (4) is provided with the through hole that is communicated with described cavity, described coupling head comprises fixed head (5) and is arranged on the couples cartridge (6) of fixed head below, fixed head is provided with coupled signal output interface (7), couples cartridge is arranged in the cavity on the coupling seat, be provided with adjustable coupling circuit in the couples cartridge, the bottom of couples cartridge is provided with coupling plate (8), the below of coupling plate is provided with coupling loop (9), one end of coupling loop connects load resistance (10), and the other end is electrically connected with output interface.
2. fixed directional coupler according to claim 1 is characterized in that the cross section of described coupling seat cavity is rounded, and described couples cartridge is cylindrical, and the length of couples cartridge and the degree of depth of cavity are suitable.
3. fixed directional coupler according to claim 2, it is characterized in that coupling plate is the printed board that is fixed on couples cartridge bottom opening place, load resistance is welded in the printed board of in a couples cartridge side, coupling loop is located at the downside of printed board, the coupled section of coupling loop is parallel with printed board, passes printed board after the two ends bending of coupled section and links to each other with load resistance and adjustable coupling circuit respectively.
4. fixed directional coupler according to claim 1 is characterized in that described adjustable coupling circuit is signal attenuation circuit or the signal demodulator circuit that is arranged on couples cartridge.
5. fixed directional coupler according to claim 4 is characterized in that described signal attenuation circuit is adjustable attenuator (11).
6. fixed directional coupler according to claim 5 is characterized in that fixed head is provided with Signal Regulation hole (12), and the adjusting knob of described adjustable attenuator is arranged in the adjustment hole.
7. fixed directional coupler according to claim 4 is characterized in that described signal demodulator circuit is large-signal linear detection circuit or small-signal square-law detection circuit.
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described fixed directional couplers, it is characterized in that coupling seat is cylindrical, fixed head is rounded, the coupled signal output interface is Q9-50KF or N-50KF high-frequency socket, and described coupled signal output interface is setovered with respect to the center of circle on circular fixed head.
9. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described fixed directional couplers, it is characterized in that coaxial feedback pipe is the coaxial feedback pipe of 41.3mm or the coaxial feedback pipe of 79.4mm, the interface at coaxial feedback pipe two ends is coaxial interface (13) or the flange-interface suitable with described coaxial feedback pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320063308 CN203205517U (en) | 2013-02-05 | 2013-02-05 | Fixed directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320063308 CN203205517U (en) | 2013-02-05 | 2013-02-05 | Fixed directional coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205517U true CN203205517U (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320063308 Expired - Fee Related CN203205517U (en) | 2013-02-05 | 2013-02-05 | Fixed directional coupler |
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| Country | Link |
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| CN (1) | CN203205517U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058411A (en) * | 2016-07-27 | 2016-10-26 | 中国电子科技集团公司第四十研究所 | Resistance compensation based coaxial dual directional coupler |
| CN106411365A (en) * | 2016-12-20 | 2017-02-15 | 中国电子科技集团公司第三十八研究所 | Microwave signal coupling apparatus |
| CN108134176A (en) * | 2017-12-28 | 2018-06-08 | 荆门市亿美工业设计有限公司 | A kind of directional coupler group of multi-parallel combination |
| WO2019052095A1 (en) * | 2017-09-17 | 2019-03-21 | 叶健聪 | Co-directional directional coupling structure |
-
2013
- 2013-02-05 CN CN 201320063308 patent/CN203205517U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058411A (en) * | 2016-07-27 | 2016-10-26 | 中国电子科技集团公司第四十研究所 | Resistance compensation based coaxial dual directional coupler |
| CN106058411B (en) * | 2016-07-27 | 2018-11-20 | 中国电子科技集团公司第四十一研究所 | A kind of coaxial dual directional coupler based on resnstance transformer |
| CN106411365A (en) * | 2016-12-20 | 2017-02-15 | 中国电子科技集团公司第三十八研究所 | Microwave signal coupling apparatus |
| WO2019052095A1 (en) * | 2017-09-17 | 2019-03-21 | 叶健聪 | Co-directional directional coupling structure |
| CN108134176A (en) * | 2017-12-28 | 2018-06-08 | 荆门市亿美工业设计有限公司 | A kind of directional coupler group of multi-parallel combination |
| CN108134176B (en) * | 2017-12-28 | 2019-01-18 | 荆门市亿美工业设计有限公司 | A kind of directional coupler group of multi-parallel combination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20200205 |