CN203691379U - Medium-wave multi-loop electro-magnetic coupling deploying network - Google Patents
Medium-wave multi-loop electro-magnetic coupling deploying network Download PDFInfo
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- CN203691379U CN203691379U CN201420022519.5U CN201420022519U CN203691379U CN 203691379 U CN203691379 U CN 203691379U CN 201420022519 U CN201420022519 U CN 201420022519U CN 203691379 U CN203691379 U CN 203691379U
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Abstract
The utility model relates to a medium-wave antenna feed network coupling system and aims to provide a medium-wave multi-loop electro-magnetic coupling deploying network. The medium-wave multi-loop electro-magnetic coupling deploying network comprises an antenna and a medium-wave carrier frequency, wherein a lightning protection grounding coil is connected between the antenna and the ground, a primary stage loop and a final stage loop are connected between the antenna and the medium-wave carrier frequency, multiple intermediate loops are arranged between the primary stage loop and the final stage loop, the primary stage loop comprises a first capacitor and a first inductor which are connected in parallel, the final stage loop comprises a third capacitor and a third inductor which are connected in parallel, and each of the intermediate loops comprises a middle stage capacitor and a middle stage inductor which are connected in parallel. The medium-wave multi-loop electro-magnetic coupling deploying network can satisfy the digital medium-wave ultra bandwidth technology requirement, that is, the technology requirement of the bandwidth B=+/-15KHz is satisfied on the condition that SWR is smaller than or equal to 1.40, the technology restrictions in a traditional medium-wave antenna feed single-loop deploying network are settled, and the new field of the medium-wave antenna feed deploying network technology is widened.
Description
Technical field
The utility model relates to medium-wave antenna-feeder net mate system, refers to especially a kind of medium wave multi-loop electric magnetic coupling allotting network.
Background technology
Antenna matching network in medium wave broadcasting transmitting antenna-feedback system adopts the single loop allotting network technology that comparatively tradition is got off in decades always, as single loop allotting networks such as common " Γ " type, " ┐ " type, " Τ " type or " ∏ " types.Along with rapid economic development, land resource are increasingly in short supply; Meanwhile, it is also more and more that each Medium Wave Station broadcasts frequency, therefore less, the miniaturization of medium wave radiating antenna trend floor space and multifrequency tower future development altogether.Due to medium wave radiating antenna miniaturization, antenna effective height declines, for the midband frequency below 810KHz in medium wave frequency range (526.5KHz～1606.5KHz), it is too narrow that antenna its standing-wave ratio after traditional single loop allotting network is less than 1.2 bandwidth, the standing-wave ratio that is difficult to meet GB regulation is less than or equal at 1.2 o'clock, and bandwidth B should be more than or equal to the technical requirement of 9KHz.The requirement even if bandwidth is up to state standards, but because the impact of seasonal climate conversion causes medium-wave antenna technical parameter to change, there is larger variation in the imaginary part of antenna impedance especially, causes allotting network off resonance, standing wave ratio of weather feedback system increases, and makes transmitter cisco unity malfunction.Therefore, many Medium Wave Stations have to annual spring, winter to medium-wave antenna-feeder allotting network check, redistribution, to guarantee safe broadcast.
Meanwhile, along with the development of broadcasting industry, MW Transmitting Station is more and more, and each station is broadcasted frequency to be increased thereupon, and therefore single loop allotting network poor anti jamming capability, is closed on station tranmitting frequency and usually occurred the situation of mutually crosstalking by sky wave evening.Traditional solution is after matching network, to increase trap to absorb network, if there is crosstalking between multiple frequencies, needs to increase several covers and absorbs network, thereby increase the use amount of components and parts, causes via net loss to strengthen.At current information high speed development, interference source increases, and electromagnetic field is day by day complicated, adopts traditional approach can not finely to address these problems.
Utility model content
The utility model proposes a kind of medium wave multi-loop electric magnetic coupling allotting network, its impact that changed by antenna parameter is less, has ensured the in stable condition work of transmitter with broader bandwidth.
The technical solution of the utility model is achieved in that a kind of medium wave multi-loop electric magnetic coupling allotting network, comprises antenna and medium wave carrier frequency, between described antenna and ground, is connected lightning protection coil.Between described antenna and medium wave carrier frequency, be provided with primary return and final stage loop, between described primary return and final stage loop, be provided with by several intermediate loops, described primary return comprises the first electric capacity and the first inductance that are in parallel, the 3rd electric capacity that described final stage loop is in parallel and the 3rd inductance, described intermediate loop comprises the intermediate electric capacity and the intermediate inductance that are in parallel;
One end ground connection that the intermediate electric capacity of described intermediate loop is connected with intermediate inductance, the other end that intermediate electric capacity is connected with intermediate inductance is set to be of coupled connections a little, is connected in series between being of coupled connections a little by intermediate coupling capacitance.
One end ground connection that described the first electric capacity is connected with the first inductance, the other end that the first electric capacity is connected with the first inductance is set to elementary tie point, is of coupled connections and o'clock connects elementary tie point by the first coupling capacitance in the serial connection two ends that are of coupled connections arbitrary;
One end ground connection that described the 3rd electric capacity is connected with the 3rd inductance, the 3rd electric capacity is set to final stage tie point with the other end that the 3rd inductance is connected, and is of coupled connections and a little connects final stage tie point by the 3rd coupling capacitance in another of serial connection two ends that be of coupled connections;
One end that described antenna is connected with lightning protection coil is connected with the 4th electric capacity and the 4th inductance in turn, the adjustable part of described the 3rd inductance connects the 4th inductance, the adjustable part of described the first inductance connects the output of medium wave carrier frequency, described the first inductance, the 3rd inductance and intermediate inductance Mutual Inductance Coupling and Same Name of Ends winding.
If it is C point that medium wave carrier frequency accesses the point of the first inductance, the tie point of the 4th inductance and the 3rd inductance is B point, and the tie point of antenna and lightning protection coil is A point.
Primary return, final stage loop and intermediate loop are all resonant elements, resonant element is made up of electric capacity and inductance, and resonance is in medium wave carrier frequency, single resonant element forms single order circuit tuning, required resonant element is determined according to actual needs, is that the quantity of intermediate loop is determined according to actual needs.Between each resonant element, can directly adopt two inductance coil mutual inductance magnetic coupling modes to connect; Or between two inductance coils flying capcitor, form electric coupling, and with two inductance coils between the magnetic coupling that produces of the mutual inductance mode of simultaneously carrying out be connected.
Lightning protection coil also has impedance transformation function simultaneously, is the resistance value that design needs by antenna at the input impedance conversion at A point place, after the 4th inductance, the 4th capacitances in series connect, is transformed to the resistance value that design needs.Regulate respectively the inductance value of the first inductance, intermediate inductance, the 3rd inductance and the on-position that B point, C are ordered, make whole allotting network medium-wave antenna impedance be equaled to the impedance of feeder line at point, to reach the object of coupling.Thereby be less than or equal in standing-wave ratio under 1.20 condition, the coupling bandwidth of the coupling bandwidth ratio tradition matching network of present networks has increased more than 2 times.
The input of present networks, output all have the direct ground connection of inductance, when the physical isolation between input and output is arranged on to several centimetres wide, can make antenna feeder network have good lightning protection effect.When the high-power medium wave transmitting of several different frequencies, present networks overcomes the obstruction network interfering with each other or absorbs network without increasing separately, just can overcome the high-frequency crosstalk between each frequency at the same time.In addition, present networks changes at antenna parameter under the impact causing, and the variation that the imaginary part of antenna impedance occurs is less, antenna parameter change to present networks below 5%.
This allotting network meets the technical requirement of the super bandwidth of digital medium wave, in SWR≤1.40 o'clock, the technical requirement of bandwidth B=± 15KHz, it has solved the technical limitation of traditional medium-wave antenna-feeder single loop allotting network, has widened the frontier of medium-wave antenna-feeder allotting network technology.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of medium wave multi-loop electric of the utility model magnetic coupling allotting network;
Fig. 2 is the structural representation of a kind of specific embodiment of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
A kind of medium wave multi-loop electric magnetic coupling allotting network, comprises antenna 1 and medium wave carrier frequency 3, between described antenna 1 and ground, is connected lightning protection coil L5.Between described antenna 1 and medium wave carrier frequency 3, be provided with primary return and final stage loop, between described primary return and final stage loop, be provided with by several intermediate loops 2, described primary return comprises the first capacitor C 1 and the first inductance L 1 that are in parallel, the 3rd capacitor C 3 that described final stage loop is in parallel and the 3rd inductance L 3, described intermediate loop 2 comprises the intermediate capacitor C 2 and the intermediate inductance L 2 that are in parallel;
One end ground connection that the intermediate capacitor C 2 of described intermediate loop 2 is connected with intermediate inductance L 2, intermediate capacitor C 2 is set to be of coupled connections a little with the other end that intermediate inductance L 2 is connected, and is connected in series between being of coupled connections a little by intermediate coupling capacitance.
One end ground connection that described the first capacitor C 1 is connected with the first inductance L 1, the first capacitor C 1 is set to elementary tie point with the other end that the first inductance L 1 is connected, and is of coupled connections and o'clock connects elementary tie point by the first coupling capacitance CM1 in the serial connection two ends that are of coupled connections arbitrary.
One end ground connection that described the 3rd capacitor C 3 is connected with the 3rd inductance L 3, the 3rd capacitor C 3 is set to final stage tie point with the other end that the 3rd inductance L 3 is connected, and is of coupled connections and a little connects final stage tie point by the 3rd coupling capacitance CM2 in another of serial connection two ends that be of coupled connections;
One end that described antenna 1 is connected with lightning protection coil L5 is connected with the 4th capacitor C 4 and the 4th inductance L 4 in turn, the adjustable part of described the 3rd inductance L 3 connects the 4th inductance L 4, the adjustable part of described the first inductance L 1 connects the output of medium wave carrier frequency 3, described the first inductance L 1, the 3rd inductance L 3 and intermediate inductance L 2 Mutual Inductance Couplings and Same Name of Ends winding.
Figure 1 shows that a schematic diagram of this allotting network, intermediate loop 2 is respectively got a loop diagram to be connected in series mutually rear two ends, and centre is that quantity omission is not shown, and intermediate coupling capacitance is also omitted not shown.If it is C point that medium wave carrier frequency 3 accesses the point of the first inductance L 1, the tie point of the 4th inductance L 4 and the 3rd inductance L 3 is B point, and antenna 1 is A point with the tie point of lightning protection coil L5.
Primary return, final stage loop and intermediate loop 2 are all resonant elements, resonant element is made up of electric capacity and inductance, and resonance is in medium wave carrier frequency 3, single resonant element forms single order circuit tuning, required resonant element is determined according to actual needs, is that the quantity of intermediate loop 2 is determined according to actual needs.Between each resonant element, can directly adopt two inductance coil mutual inductance magnetic coupling modes to connect; Or between two inductance coils flying capcitor, form electric coupling, and with two inductance coils between the magnetic coupling that produces of the mutual inductance mode of simultaneously carrying out be connected.
Lightning protection coil L5 also has impedance transformation function simultaneously, is the resistance value that design needs by antenna 1 at the input impedance conversion at A point place, after the 4th inductance L 4, the 4th capacitor C 4 are connected in series, is transformed to the resistance value that design needs.Regulate respectively the inductance value of inductance coil L1, L2, L3 and the on-position that B point, C are ordered, make whole allotting network medium-wave antenna impedance be equaled to the impedance of feeder line at C point, to reach the object of coupling.Thereby be less than or equal in standing-wave ratio under 1.20 condition, the coupling bandwidth of the coupling bandwidth ratio tradition matching network of present networks has increased more than 2 times.
The input of present networks, output all have the direct ground connection of inductance in addition, when the physical isolation between input and output is arranged on to several centimetres wide, can make antenna feeder network have good lightning protection effect.When the high-power medium wave transmitting of several different frequencies, present networks overcomes the obstruction network interfering with each other or absorbs network without increasing separately, just can overcome the high-frequency crosstalk between each frequency at the same time.In addition, present networks changes at antenna parameter under the impact causing, and the variation that the imaginary part of antenna impedance occurs is less, antenna parameter change to present networks below 5%.
This allotting network meets the technical requirement of the super bandwidth of digital medium wave, in SWR≤1.40 o'clock, the technical requirement of bandwidth B=± 15KHz, it has solved the technical limitation of traditional medium-wave antenna-feeder single loop allotting network, has widened the frontier of medium-wave antenna-feeder allotting network technology.
Allotting network embodiment illustrated in fig. 2 is made up of three resonant elements, i.e. intermediate loop is one, and all access the 4th inductance of the 3rd inductance.In Fig. 2, L1, C1 shunt circuit form the primary return of three circuit electromagnetic coupling allotting networks; The intermediate loop 2 of L2, C2 shunt circuit composition circuit electromagnetic coupling allotting network; The 3rd inductance is access the 4th inductance all, is equivalent to final stage loop and is only made up of L3; The equal resonance in each loop is in medium wave carrier frequency 3, and forms three circuit electromagnetics coupling allotting networks by the coupling ability of the first coupling capacitance CM1, the 3rd coupling capacitance CM2 and inductance coil self.In the time that three circuit electromagnetic coupling allotting networks cannot meet technical requirement, can increase again single order or multistage loop, form multi-loop electric magnetic coupling allotting network.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (2)
1. a medium wave multi-loop electric magnetic coupling allotting network, comprise antenna and medium wave carrier frequency, between described antenna and ground, be connected lightning protection coil, it is characterized in that: between described antenna and medium wave carrier frequency, be provided with primary return and final stage loop, between described primary return and final stage loop, be provided with by several intermediate loops, described primary return comprises the first electric capacity and the first inductance that are in parallel, the 3rd electric capacity that described final stage loop is in parallel and the 3rd inductance, described intermediate loop comprises the intermediate electric capacity and the intermediate inductance that are in parallel;
One end ground connection that the intermediate electric capacity of described intermediate loop is connected with intermediate inductance, the other end that intermediate electric capacity is connected with intermediate inductance is set to be of coupled connections a little, is connected in series between being of coupled connections a little by intermediate coupling capacitance;
One end ground connection that described the first electric capacity is connected with the first inductance, the other end that the first electric capacity is connected with the first inductance is set to elementary tie point, is of coupled connections and o'clock connects elementary tie point by the first coupling capacitance in the serial connection two ends that are of coupled connections arbitrary;
One end ground connection that described the 3rd electric capacity is connected with the 3rd inductance, the 3rd electric capacity is set to final stage tie point with the other end that the 3rd inductance is connected, and is of coupled connections and a little connects final stage tie point by the 3rd coupling capacitance in another of serial connection two ends that be of coupled connections;
One end that described antenna is connected with lightning protection coil is connected with the 4th electric capacity and the 4th inductance in turn, the adjustable part of described the 3rd inductance connects the 4th inductance, the adjustable part of described the first inductance connects medium wave carrier frequency output, described the first inductance, the 3rd inductance and intermediate inductance Mutual Inductance Coupling and Same Name of Ends winding.
2. medium wave multi-loop electric magnetic coupling allotting network according to claim 1, is characterized in that: described intermediate loop is one, and described the 3rd inductance is access the 4th inductance all.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420022519.5U CN203691379U (en) | 2014-01-14 | 2014-01-14 | Medium-wave multi-loop electro-magnetic coupling deploying network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420022519.5U CN203691379U (en) | 2014-01-14 | 2014-01-14 | Medium-wave multi-loop electro-magnetic coupling deploying network |
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| CN203691379U true CN203691379U (en) | 2014-07-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040263A (en) * | 2015-11-18 | 2017-08-11 | 株式会社村田制作所 | High-frequency model and communicator |
| CN111224652A (en) * | 2020-01-19 | 2020-06-02 | 广州慧智微电子有限公司 | Radio frequency switch circuit and circuit control method |
-
2014
- 2014-01-14 CN CN201420022519.5U patent/CN203691379U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040263A (en) * | 2015-11-18 | 2017-08-11 | 株式会社村田制作所 | High-frequency model and communicator |
| CN107040263B (en) * | 2015-11-18 | 2019-07-05 | 株式会社村田制作所 | High-frequency model and communication device |
| CN111224652A (en) * | 2020-01-19 | 2020-06-02 | 广州慧智微电子有限公司 | Radio frequency switch circuit and circuit control method |
| WO2021143140A1 (en) * | 2020-01-19 | 2021-07-22 | 广州慧智微电子有限公司 | Radio frequency switch circuit, and circuit control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220402 Address after: 610000 room 1201, 12 / F, building 2, No. 69, Qingyun South Street, Jinjiang District, Chengdu, Sichuan Patentee after: Chengdu Jifen Technology Co.,Ltd. Address before: No.8 Yusha Road, Qingyang District, Chengdu, Sichuan 610000 Patentee before: CHENGDU LINPHO ANTENNA EQUIPMENT Co.,Ltd. |
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Granted publication date: 20140702 |
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