CN207338603U - A kind of 3kW frequency modulation digital audio broadcasting directional coupler - Google Patents

Abstract

The utility model discloses a kind of 3kW frequency modulation digital audio broadcasting directional coupler, there is coupling seat including being fixed on outer conductor, coupling seat is equipped with coupling head, the coupling head includes the positioning plate and earth plate being parallel to each other, connected between positioning plate and earth plate by connector, positioning plate is equipped with four arc positioning grooves being arranged circumferentially along positioning plate, connector side on coupling head forms jagged, termination power plate is equipped with notch, positioning plate is equipped with output interface, and earth plate is equipped with coupling ring close to inner wire side.It efficiently solves that coupling effect existing for the directional coupler of the prior art is poor, easily main feed pipe is had an impact and the problem of reliability is low, the directional coupler coupling effect of the utility model is good, influence to main feed pipe is small and reliability is high, has very high practical value.

Description

A kind of 3kW frequency modulation digital audio broadcasting directional coupler

Technical field

A kind of coupler is the utility model is related to, especially a kind of orientation of 3kW frequency modulation digital audio broadcasting transmitter Coupler.

Background technology

Four port organizations that directional coupler is made of transport part and coupling part, are mainly used for the signal point of high-frequency circuit Match somebody with somebody, synthesize and detect, its operation principle is when the signal for having definite direction on transmission line is propagated, since transmission line is with coupling The effect of parasitic capacitance and stray inductance between line, the AC signal in definite direction is also had on coupling line.Frequency modulation numeral sound Directional coupler on frequency broadcast transmitter for signal detection is a kind of coupler of weak coupling, and such of the prior art is fixed Install the structure type of coupling head, in order to make degree of coupling size adjusted, existing skill on to coupler generally use main feed pipe additional The insertion depth and angle of art coupling head are adjustable structure.This structure is in addition to volume is big, complicated and cost is higher；It is fixed Easily influenced to the directionality index of coupler be subject to the insertion depth of coupling head, while the insertion depth of coupling head has an effect on The impedance of main feed pipe, influences the overall technology index of output system.Publication date is September in 2013 18 days, Publication No. The patent document of CN203205517U discloses a kind of fixed directional coupler, and the outer conductor of coaxial feed tube, which is equipped with, to be used for admittedly The coupling seat of the fixed coupling head, coupling seat are equipped with cavity, and the outer conductor of coaxial feed tube is equipped with what is connected with the cavity Through hole, the coupling head include fixed plate and the couples cartridge being arranged on below fixed plate, and it is defeated that fixed plate is equipped with coupled signal Outgoing interface, couples cartridge are arranged in the cavity on coupling seat, are equipped with adjustable coupling circuit in couples cartridge, the bottom of couples cartridge is equipped with Coupling plate, the lower section of coupling plate are equipped with coupling ring, one end connection load resistance of coupling ring, and the other end is electrically connected with output interface Connect.This fixed directional coupler although solve the directional coupler of the prior art existing for coupled signal easily occur The problem of changing and influencing transmitting equipment normal work, but the Best Coupling direction of coupler usually has necessarily with theoretical value Deviation, therefore the coupler of this fixed structure is unable to reach optimum efficiency；On the other hand, the termination power on this coupler Plate region be directly facing main feed pipe, and easily main feed pipe is had an impact, simultaneously because the power passed through on main feed pipe is very big, easily in coupling The junction of syncephalon and main feed pipe occurs striking sparks and damages termination power plate, have impact on the reliability of coupling head.

Utility model content

Coupling effect existing for the directional coupler of the prior art is poor, easily main feed pipe is produced to solve for the utility model It is raw to influence and provide the 3kW tune that a kind of coupling effect is good, the influence to main feed pipe is small and high reliability the problem of reliability is low Frequency digital audio directed broadcasting coupler.

The utility model is that concrete technical scheme is used by reaching above-mentioned technical purpose：A kind of 3kW frequency modulation numeral sound Frequency directed broadcasting coupler, including transport part and coupling part, the transport part are coaxial configuration, including the outer conductor of circular tube shaped and The inner wire being co-axially located in outer conductor, the both ends of inner wire are connected with sleeve, coupling seat are fixed with the outer wall of outer conductor, The through hole through the outer conductor is equipped with the coupling seat, coupling seat is equipped with coupling head, and the coupling head includes mutual Parallel positioning plate and earth plate, the positioning plate, in cylinder, pass through connection with earth plate between positioning plate and earth plate Body connects, and positioning plate is equipped with four arc positioning grooves being arranged circumferentially along positioning plate, and positioning plate passes through arc positioning groove It is positioned on coupling seat, connector is respectively positioned in through hole with earth plate, and the connector side on coupling head forms jagged, notch Interior to be equipped with termination power plate, positioning plate is equipped with the output interface being connected with termination power plate, and earth plate is close to inner wire side Equipped with the coupling ring being connected with termination power plate.Coupling seat is fixed with the outer wall of the outer conductor of the utility model, on coupling seat Equipped with coupling head, adjustable or the structure that is completely fixed is different from traditional coupling head insertion depth, the utility model coupling head is being inserted Enter and fixed structure is used in depth, to simplify the structure of coupler, and use can finely tune on the coupling direction of coupling head Structure, can rotate the direction of insertion that 180 degree changes coupling head by four arc grooves on positioning plate during use, realize positive Or reverse coupled, can also in the length range of arc groove Small-angle Rotation coupling head, realize fine setting coupling direction, so as to solve Certainly the coupling head of fixed structure is unable to reach the problem of Best Coupling effect.On the other hand, the coupling head of the utility model by Nearly main feed pipe one end sets one piece of earth plate, for closing on main feed pipe the notch formed because coupling head is set, and couples Circuit board is arranged on the outside of earth plate, and the influence very little of the structure of such coupling part to main feed pipe, does not interfere with transmitter output The overall technology index of system；The also very little of influence of the main feed pipe to termination power plate on coupling head at the same time, will not be because of main feed pipe High-power appearance strike sparks and damage termination power plate, improve the reliability of termination power.

Preferably, the central angle corresponding to arc positioning groove both ends is 35 to 45 degree, the positioning plate is equipped with locking Screw hole, locking screw holes are interior to be equipped with lock-screw, and Signal Regulation hole is additionally provided with positioning plate.Circle corresponding to arc positioning groove both ends Heart angle is 35 to 45 degree, considers that fixing screws need to take 10 degree of central angle, the actually corresponding rotatable angle of maximum of coupling head Spend for 25 degree to 35 degree, i.e., respectively deviate 12.5 degree to 17.5 degree with inner wire direction both sides, can meet coupler Best Coupling The fine setting requirement in direction.Lock-screw further locks coupling head on the basis of fixing screws fixed coupling head, it is ensured that coupling Head occurs without loosening during transmitter transport and use.Coupling head inner couplings circuit can be adjusted by Signal Regulation hole Potentiometer on plate, for changing the size of signal, plays the role of the adjusting of conventional coupler insertion depth.

Preferably, connector is semi-cylindrical, the termination power plate is fixed on the side plane of semi-cylindrical, described Connector, positioning plate and earth plate three are homogeneity integrative-structure.Connector is semi-cylindrical, in addition the position of half of cylinder Notch is formed, for setting termination power plate.

Preferably, the lower surface of earth plate and the inner wall periphery of outer conductor are tangent, the coupling ring is located at outer conductor Inner wall periphery and inner wire outer circumferential surface between and close to outer conductor inner wall periphery.The lower surface of earth plate with leading outside The inner wall periphery of body is tangent, then substantially maintains the integrality of outer conductor, and coupling ring is located at the inner wall of outer conductor, The directionality index of coupler can be improved.

Preferably, earth plate is equipped with two threading holes, stepped insulation column is equipped with threading hole, in insulation column Centre is equipped with cable-through hole, and the both ends of coupling ring are connected through the cable-through hole with termination power plate, and the coupled section of coupling ring is linear Shape and parallel with earth plate.

Preferably, coupling seat is four, the both sides of outer conductor are symmetricly set on, coupling is equipped with each coupling seat Head, the coupling seat relative to outer conductor length direction center-biased.Four coupling heads are set to substantially meet 3kW frequency modulation The output par, c monitoring of digital audio broadcasting transmitter needs.

Preferably, one end of coupling ring and one end of build-out resistor connect, and the other end ground connection of build-out resistor, coupling ring The other end be connected by the one end of detection tube respectively with the first capacitance and inductance, the other end of the first capacitance ground connection, inductance The one end of the other end respectively with the second capacitance, load resistance and potentiometer is connected, the second capacitance, load resistance and potentiometer it is another One end is grounded, and the adjustable side of potentiometer is connected with coupling interface.Termination power on the utility model termination power plate is used for will High-frequency signal is converted to direct current signal, for power detection and control.

The beneficial effects of the utility model are：It efficiently solves the existing coupling effect of directional coupler of the prior art Fruit is poor, easily main feed pipe is had an impact and the problem of reliability is low, the directional coupler coupling effect of the utility model is good, Influence to main feed pipe is small and reliability is high, has very high practical value.

Brief description of the drawings

Fig. 1 is a kind of structure diagram of the utility model；

Fig. 2 is the top view of Fig. 1；

Fig. 3 is a kind of structure sectional view of the utility model coupling head；

Fig. 4 is the top view of Fig. 3；

Fig. 5 is the left view of Fig. 3；

Fig. 6 is a kind of circuit diagram of coupling head.

In figure：1. outer conductor, 2. inner wires, 3. sleeves, 4. coupling seats, 5. coupling heads, 6. positioning plates, 7. earth plates, 8. Connector, 9. arc positioning grooves, 10. notches, 11. termination power plates, 12. output interfaces, 13. coupling rings, 14. locking screw holes, 15. Signal Regulation hole, 16. insulation columns, 17. fixing screws, 18. insulators, R1. build-out resistors, R2. load resistances, R3. Potentiometer, the first capacitances of C1., the second capacitances of C2., L1. inductance, V1. detection tubes.

Embodiment

The embodiment of technical solutions of the utility model is made further below by way of examples and with reference to the accompanying drawings Explanation.

Embodiment 1

In the embodiment 1 as shown in Fig. 1 Fig. 2, a kind of 3kW frequency modulation digital audio broadcasting directional coupler, including transmission Portion and coupling part, the transport part are coaxial configuration, including the outer conductor 1 of circular tube shaped and are led in being co-axially located in outer conductor Body 2, the both ends of inner wire are connected with sleeve 3, and the junction of sleeve and inner wire is equipped with the insulator 18 for being used to support inner wire, Be symmetrically fixed with four coupling seats 4 on the outer wall of outer conductor, the coupling seat relative to outer conductor length direction center-biased, The through hole through the outer conductor is equipped with the coupling seat, coupling head 5, the coupling head bag are equipped with each coupling seat Include the positioning plate 6 and earth plate 7 being parallel to each other（See Fig. 3）, the positioning plate is with earth plate in cylinder, positioning plate and ground connection Connected between plate by the connector 8 of semi-cylindrical, the connector, positioning plate and earth plate three are homogeneity integrative-structure. Positioning plate is equipped with four arc positioning grooves 9 being arranged circumferentially along positioning plate（See Fig. 4）, corresponding to arc positioning groove both ends Central angle be 40 degree, positioning plate is positioned on coupling seat by arc positioning groove and fixing screws 17, is additionally provided with positioning plate Locking screw holes 14, locking screw holes are interior to be equipped with lock-screw, and Signal Regulation hole 15 is additionally provided with positioning plate.Connector is equal with earth plate In through hole, the lower surface of earth plate and the inner wall periphery of outer conductor are tangent, the semi-cylindrical connector one on coupling head Side forms jagged 10（See Fig. 5）, notch is interior to be equipped with termination power plate 11, and termination power plate is fixed on the side plane of semi-cylindrical On, positioning plate is equipped with the output interface 12 being connected with termination power plate, and earth plate is equipped with coupling electricity close to inner wire side The coupling ring 13 of road plate connection；The coupling ring is located between the inner wall periphery of outer conductor and the outer circumferential surface of inner wire and close The inner wall periphery of outer conductor.Earth plate is equipped with two threading holes, and stepped insulation column 16, insulation branch are equipped with threading hole Column center is equipped with cable-through hole, and the both ends of coupling ring are connected through the cable-through hole with termination power plate, and the coupled section of coupling ring is in It is linear and parallel with earth plate.

One end of coupling ring is connected with one end of build-out resistor R1, the other end of build-out resistor ground connection, coupling ring it is another End is connected by the one end of detection tube V1 respectively with the first capacitance C1 and inductance L1, the other end ground connection of the first capacitance, inductance The one end of the other end respectively with the second capacitance C2, load resistance R2 and potentiometer R3 is connected, the second capacitance, load resistance and current potential The other end ground connection of device, the adjustable side of potentiometer is connected with coupling interface.

Coupling seat is fixed with the outer wall of the outer conductor of the utility model, coupling seat is equipped with coupling head, is coupled with tradition The structure that head insertion depth is adjustable or is completely fixed is different, and the utility model coupling head uses fixed structure on insertion depth, To simplify the structure of coupler, and the structure that use can finely tune on the coupling direction of coupling head, when use, passes through positioning plate On four arc grooves can rotate 180 degree change coupling head direction of insertion, realization couple forward or backwards, can also be in arc Small-angle Rotation coupling head in the length range of shape groove, realizes fine setting coupling direction, thus solve the coupling head of fixed structure without Method reaches the problem of Best Coupling effect.On the other hand, the coupling head of the utility model is setting one piece close to main feed pipe one end Earth plate, for closing on main feed pipe the notch formed because coupling head is set, and termination power plate is arranged on outside earth plate Side, the influence very little of the structure of such coupling part to main feed pipe, does not interfere with the overall technology index of transmitter output system；Together When influence of the main feed pipe to termination power plate on coupling head also very little, will not strike sparks and damage because of the high-power appearance of main feed pipe Termination power plate, improves the reliability of termination power.

In addition to the implementation, in the scope disclosed in claims and specification in the utility model, this practicality New technical characteristic or technical data can be reselected and combined, so as to form new embodiment, these are all these Field technology personnel need not carry out that creative work is i.e. achievable, therefore the implementation that these the utility model are not described in Example also should be regarded as specific embodiment of the utility model and within the scope of protection of the utility model.

Claims (7)

1. a kind of 3kW frequency modulation digital audio broadcasting directional coupler, including transport part and coupling part, it is characterized in that：The transmission Portion is coaxial configuration, includes the outer conductor of circular tube shaped（1）And it is co-axially located at the inner wire in outer conductor（2）, the two of inner wire End is connected with sleeve（3）, coupling seat is fixed with the outer wall of outer conductor（4）, it is equipped with the coupling seat and runs through the outer conductor Through hole, coupling seat is equipped with coupling head（5）, the coupling head includes the positioning plate being parallel to each other（6）With earth plate（7）, The positioning plate, in cylinder, passes through connector with earth plate between positioning plate and earth plate（8）Connection, positioning plate are equipped with Four arc positioning grooves being arranged circumferentially along positioning plate（9）, positioning plate is positioned on coupling seat by arc positioning groove, even Junctor is respectively positioned in through hole with earth plate, and the connector side on coupling head forms jagged（10）, notch is interior to be equipped with coupling electricity Road plate（11）, positioning plate is equipped with the output interface being connected with termination power plate（12）, earth plate is equipped with close to inner wire side The coupling ring being connected with termination power plate（13）.

2. 3kW frequency modulation digital audio broadcasting directional coupler according to claim 1, it is characterised in that the arc positioning Central angle corresponding to groove both ends is 35 to 45 degree, and the positioning plate is equipped with locking screw holes（14）, locking screw holes are interior to be equipped with lock Tight screw, is additionally provided with Signal Regulation hole on positioning plate（15）.

3. 3kW frequency modulation digital audio broadcasting directional coupler according to claim 1, it is characterised in that the connector is Semi-cylindrical, the termination power plate are fixed on the side plane of semi-cylindrical, the connector, positioning plate and earth plate three For homogeneity integrative-structure.

4. 3kW frequency modulation digital audio broadcasting directional coupler according to claim 1, it is characterised in that the earth plate The inner wall periphery of lower surface and outer conductor is tangent, and the coupling ring is located at the inner wall periphery of outer conductor and the periphery of inner wire Between face and close to the inner wall periphery of outer conductor.

5. 3kW frequency modulation digital audio broadcasting directional coupler according to claim 1, it is characterised in that on the earth plate Equipped with two threading holes, stepped insulation column is equipped with threading hole（16）, insulation column is central to be equipped with cable-through hole, coupling ring Both ends are connected through the cable-through hole with termination power plate, and the coupled section of coupling ring is linearly and parallel with earth plate.

6. 3kW frequency modulation digital audio broadcasting directional coupler according to claim 1, it is characterised in that the coupling seat For four, the both sides of outer conductor are symmetricly set on, coupling head are equipped with each coupling seat, the coupling seat is relative to outer conductor The center-biased of length direction.

7. according to claim 1-6 any one of them 3kW frequency modulation digital audio broadcasting directional couplers, it is characterised in that described One end of coupling ring and build-out resistor（R1）One end connection, the other end ground connection of build-out resistor, the other end of coupling ring passes through Detection tube（V1）Respectively with the first capacitance（C1）And inductance（L1）One end connection, the first capacitance the other end ground connection, inductance The other end respectively with the second capacitance（C2）, load resistance（R2）And potentiometer（R3）One end connection, the second capacitance, load resistance And the other end ground connection of potentiometer, the adjustable side of potentiometer is connected with coupling interface.