CN201294254Y - Short-wave large-power directional coupler - Google Patents
Short-wave large-power directional coupler Download PDFInfo
- Publication number
- CN201294254Y CN201294254Y CNU2008201617719U CN200820161771U CN201294254Y CN 201294254 Y CN201294254 Y CN 201294254Y CN U2008201617719 U CNU2008201617719 U CN U2008201617719U CN 200820161771 U CN200820161771 U CN 200820161771U CN 201294254 Y CN201294254 Y CN 201294254Y
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- directional coupler
- coupling head
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Abstract
The utility model relates to a shortwave big-power directional coupler, which is divided into a coaxial cavity and a coupling head, and a coupling head circuit is mounted on the cavity wall. The coupling head circuit comprises a sampling coil (L1) and a sampling capacitor (C2), wherein one end of the sampling coil (L1) is grounded, and the other end is grounded through a capacitor and a resistance element which are connected in series, the capacitor and a resistance connecting end are connected with a rectifier diode, and the output of the rectifier diode is connected with (R2, C4) filter circuits, direct current which reflects power size is output after adjusting by a potentiometer, and the negative end of the diode is further connected on the sampling capacitor (C2) which is coupled on the cavity. The shortwave big-power directional coupler has flexible positive and reverse power detection, and the same coupling head not only can detect positive power, but also can detect reverse power only through rotating 180 degrees in the cavity.
Description
One, technical field
The utility model relates to radio frequency electric technology, especially short-wave large-power directional coupler.
Two, background technology
The short wave communication of China mainly adopts the transmitter of 100W～1000W for many years, along with electromagnetic environment becomes increasingly complex, electronic countermeasures is fierce day by day, for fartherly logical, better logical, users such as communication, radar, electronic countermeasures, electromagnetic surveying are also growing to the demand of SkW～50kW high-power transmitter.The high-power transmitter of short wave broadband is the new technology new product that China succeeded in developing in recent years.In radio frequency and microwave technology, directional coupler is one of key technology, and it can distribute, sample, detect, control or the like power.The directional coupler kind is a lot of both at home and abroad, by the transmission line type branch directional coupler waveguide, coaxial line, microstrip line is arranged; The strong and weak branch close coupling, middle coupling, weak coupling directional coupler are arranged by coupler, multiple directional coupler principle has nothing in common with each other, and structural difference is very big, but the directional coupler of the high-power transmitter that also suitable fully at present my unit develops.
Three, utility model content:
The utility model purpose is: propose a kind of short-wave large-power directional coupler, for the forward and reverse power to high-power transmitter detects, controls.
Technical solutions of the utility model are: short-wave large-power directional coupler, directional coupler is divided into coaxial cavity and coupling head (interior dress coupling circuit) two parts, cavity, at cavity wall the coupling head circuit is installed, described coupling head circuit comprises sample coil L1 and sampling capacitor C2, sample coil L1 one end ground connection, the other end is by the electric capacity and the resistive element ground connection of series connection, be connected a rectifier diode from described electric capacity with the resistance link, rectifier diode output connects R2, the C4 filter circuit, the direct voltage of output reflection watt level after potentiometer is regulated, the diode negative terminal also connects a sampling capacitor C2 in the cavity coupling.The sample circuit that detects backward power is the Rotate 180 ° installation on cavity of described coupling head.
The beneficial effects of the utility model are: the utility model is suitable for the directional coupler of RF high power, directional coupler is divided into cavity and two parts of coupling head, cavity is by radio frequency high voltage, big electric current, and input vswr and insertion loss can be done very for a short time.Coupling circuit is installed in the coupling head, and the power capacity of all elements is all less than 0.1 watt.The forward and reverse power detection of the utility model is flexible, and same coupling head both can detect forward power, only needs to revolve 180 ° on cavity and just can detect backward power.The utility model is practical application in 20kW and 5kW short-wave transmitter, and is respond well.
Four, description of drawings
Shown in Figure 1 is the short-wave large-power directional coupler circuit block diagram
Fig. 2 is the directional coupler circuit diagram
Fig. 3 is directional coupler reference circuit figure
Fig. 4 is directional coupler mounting structure figure
Five, embodiment
Directional coupler has two sample circuits respectively the power output Po of transmitter to be carried out current sampling and voltage sampling among Fig. 1.The voltage that voltage that current sampling obtains and voltage sampling obtain, regulate by balancing network 1 and balancing network 2, the signal of the backward power that comprises in the two-way sampled signal is cancelled each other, the signal of the forward power that comprises in the two-way sampled signal is superposeed mutually, can detect forward power.The forward signal of stack is given power and is shown and control assembly after over commutation, filtering, output amplitude are regulated.With same circuit, as long as change the polarity of current sampling signal, the signal of the forward power that comprises in the two-way sampled signal is cancelled each other, the signal of the backward power that comprises in the two-way sampled signal is superposeed mutually, can detect backward power.
Directional coupler circuit (coupling head circuit diagram) is as shown in Figure 2: directional coupler adopts the radio frequency cavity that the structure of coupling head is installed, and promptly cavity wall is installed the coupling head circuit.
Comprise sample coil L1 and sampling capacitor C2, sample coil L1 one end ground connection, the other end is connected a sampling diode by the electric capacity and the resistive element ground connection of series connection from described electric capacity with the resistance link, connect display control circuit after the output of sampling diode connects current-limiting resistance; The sampling diode output is the in parallel one sampling capacitor C2 in the cavity coupling also.The power output Po of transmitter carries out the circuit of current sampling and voltage sampling.The key technical indexes: working band 2MHz～30MHz, degree of coupling 90dB, directionality 2dB, input standing-wave ratio 1.05.
The characteristics of this directional coupler are to be skillfully constructed, and circuit is succinct, and rectifier diode VD1 is placed on the position among Fig. 2, greatly facilitate the direction-sense adjustment of coupler.If rectifier diode VD1 is placed on the position among Fig. 3 reference circuit figure, can be much more difficult when coupler is adjusted directionality.
On the structure directional coupler is divided into cavity and two parts of coupling head (referring to Fig. 4, forward power sampling coupling head 1, backward power sampling coupling head 2, N type socket inverse detection signal send mouthfuls 3, N type socket forward detection signal sends mouthfuls 4, coaxial cavity can pass through 20kW radio-frequency power 5, power output 6), cavity can pass through radio frequency high voltage, big electric current, and input vswr and insertion loss can be done very for a short time.Coupling circuit is installed in the coupling head, and the power capacity of all elements is all less than 1/10th watts.Loss is big when having avoided old-fashioned directional coupler to do high-power detection, and it is hot to generate heat, shortcomings such as frequency response difference.Forward and reverse power detection is flexible, and same coupling head both can detect forward power, only needs on cavity Rotate 180 ° just can detect backward power.
Claims (2)
1, short-wave large-power directional coupler, directional coupler is divided into coaxial cavity and coupling head two parts, cavity, it is characterized in that the coupling head circuit being installed at cavity wall, described coupling head circuit comprises sample coil (L1) and sampling capacitor (C2), sample coil (L1) end ground connection, the other end is by the electric capacity and the resistive element ground connection of series connection, be connected a rectifier diode from described electric capacity with the resistance link, rectifier diode output connects (R2, C4) filter circuit, the direct voltage of output reflection watt level after potentiometer is regulated, the diode negative terminal also connects a sampling capacitor (C2) in the cavity coupling.
2, short-wave large-power directional coupler according to claim 1, the sample circuit that it is characterized in that detecting backward power is the Rotate 180 ° installation on cavity of described coupling head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201617719U CN201294254Y (en) | 2008-09-26 | 2008-09-26 | Short-wave large-power directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201617719U CN201294254Y (en) | 2008-09-26 | 2008-09-26 | Short-wave large-power directional coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201294254Y true CN201294254Y (en) | 2009-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201617719U Expired - Fee Related CN201294254Y (en) | 2008-09-26 | 2008-09-26 | Short-wave large-power directional coupler |
Country Status (1)
| Country | Link |
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| CN (1) | CN201294254Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383443B (en) * | 2008-09-26 | 2013-02-20 | 熊猫电子集团有限公司 | Short-wave large-power directional coupler |
| CN105789807A (en) * | 2016-04-06 | 2016-07-20 | 西安澳通电讯技术股份有限公司 | Intelligent cavity coupler with detection modules and manufacturing method thereof |
-
2008
- 2008-09-26 CN CNU2008201617719U patent/CN201294254Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383443B (en) * | 2008-09-26 | 2013-02-20 | 熊猫电子集团有限公司 | Short-wave large-power directional coupler |
| CN105789807A (en) * | 2016-04-06 | 2016-07-20 | 西安澳通电讯技术股份有限公司 | Intelligent cavity coupler with detection modules and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20091026 |