CN104282976A - 3dB directional coupler high in isolation and low in passive intermodulation - Google Patents
3dB directional coupler high in isolation and low in passive intermodulation Download PDFInfo
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- CN104282976A CN104282976A CN201410536316.2A CN201410536316A CN104282976A CN 104282976 A CN104282976 A CN 104282976A CN 201410536316 A CN201410536316 A CN 201410536316A CN 104282976 A CN104282976 A CN 104282976A
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- strip line
- directional coupler
- passive intermodulation
- isolation
- low
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Abstract
The invention relates to a 3dB directional coupler high in isolation and low in passive intermodulation. The 3dB directional coupler comprises a shell and a microwave connector connected to the side wall of the shell. Two strip line metal conductors are suspended in a cavity of the shell, a flaky dielectric strut is arranged between the two strip line metal conductors and fixed through a dielectric fastener, the two strip line metal conductors are connected with the microwave connector through screws, and a cover plate is connected to the shell to form a closed cavity. The two strip line metal conductors are suspended in the cavity formed by the metal shell and the cover plate, coupling of signal energy is generated through a gap between the two strip line metal conductors, and the capacity of the strip line metal conductors is prominent so that high isolation performance of a broadband can be achieved. The 3dB directional coupler has high isolation, a low standing wave and low passive intermodulation performance on the broadband and is easy to assemble and debug and low in manufacturing cost.
Description
Technical field
The present invention relates to the 3dB directional coupler of radio communication, particularly relate to a kind of high power three-dB coupler with broadband, high-isolation and low passive intermodulation.
Background technology
3dB directional coupler is widely used in twireless radio-frequency communication field, is commonly used to synthesis or separate signal.Common mainly contains two output 90 ° and 180 ° of phase difference two types.Branch line structure directional coupler is arrowband coupler; The coupler in broadband adopts the coupled line structure of more piece usually, and joint number is more, and bandwidth is wider.In order to the Input matching obtained, often save coupling line and must have 50 ohm characteristic impedance, the coupling coefficient often saved determines total coupling coefficient and coupling ripple coefficient.The coupled line structure of more piece has symmetrical and asymmetric two kinds, and the joint number normally odd number of symmetrical more piece coupled line structure, ensures that two outputs have 90 ° of phase differences simultaneously; Asymmetric more piece coupled line structure coupling line can realize wider bandwidth or less ripple, but can not ensure that two outputs have 90 ° of phase differences.The minimum clearance that maximum power is decided by between coupling line can be born.
Summary of the invention
The object of the invention is the deficiency overcoming prior art existence, a kind of strip transmission line coupler with broadband, high-isolation, two outputs, 90 ° of phase differences, low passive intermodulation is provided.
Object of the present invention is achieved through the following technical solutions:
High-isolation low passive intermodulation 3dB directional coupler, comprise housing and the microwave junction being connected to its sidewall, feature is: in the cavity of described housing, suspension has two strip line metallic conductors, between two strip line metallic conductors, there is sheet medium supporter and fixed by medium securing member, by screw attachment between described two strip line metallic conductors and microwave junction, cover plate is connected on housing and forms airtight cavity.
Further, above-mentioned high-isolation low passive intermodulation 3dB directional coupler, wherein, described strip line metallic conductor is made up of more piece, and joint has capacitive character with the connection place of joint and protrudes.
Further, above-mentioned high-isolation low passive intermodulation 3dB directional coupler, wherein, the center conductor end of described microwave junction is semi-cylindrical in configuration, provides the plane connected with strip line metallic conductor.
Further, above-mentioned high-isolation low passive intermodulation 3dB directional coupler, wherein, described sheet medium supporter is disc-shaped plastic support thing.
Again further, above-mentioned high-isolation low passive intermodulation 3dB directional coupler, wherein, described medium securing member is plastic screw.
Again further, above-mentioned high-isolation low passive intermodulation 3dB directional coupler, wherein, described cover plate is provided with screwed hole, is connected with debugging screw in screwed hole.
Substantive distinguishing features and the progress of technical solution of the present invention are mainly reflected in:
Adopt certain thickness metal band-shaped line to be suspended in air cavity, insertion loss is low, and input standing wave is little, and isolation is high, and ripple is little and to bear power high, realizes high-isolation in broadband, low standing wave and low passive inter-modulation performance.Use screw connecting components, and adopt debugging screw, improve the reliability of passive intermodulation, reduce complexity and the cost of assembling and debugging, be easy to large-scale production.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, technical solution of the present invention is described further:
Fig. 1: organigram of the present invention.
Embodiment
As shown in Figure 1, high-isolation low passive intermodulation 3dB directional coupler, comprise housing 1 and the microwave junction 7 being connected to its sidewall, the center conductor end of microwave junction 7 is semi-cylindrical in configuration, the plane connected with strip line metallic conductor is provided, in the cavity of housing 1, suspension has the first strip line metallic conductor 3 and the second strip line metallic conductor 4, strip line metallic conductor is made up of more piece, joint has capacitive character with the connection place of joint and protrudes, there is between two strip line metallic conductors disc-shaped plastic support thing 6 and fixed by plastic screw 5, first strip line metallic conductor 3 and pass through screw attachment between the second strip line metallic conductor 4 and microwave junction 7, to guarantee low passive inter-modulation performance, disc-shaped plastic support thing 6 is guaranteed not come in contact between the first strip line metallic conductor 3 and the second strip line metallic conductor 4, the fixing gap that also can regulate between the first strip line metallic conductor 3 and the second strip line metallic conductor 4 of plastic screw 5.Cover plate 2 is connected on housing 1 and forms airtight cavity, and cover plate 2 is provided with screwed hole, is connected with debugging screw in screwed hole.Protective cover plate 8 is for preventing entering of dust and water.The air filled cavity of housing 1 has projection at the discontinuous place of corresponding strip line metallic conductor.
The cavity of the housing 1 of metal material has the irregularly shaped of optimization, each joint of first strip line metallic conductor 3 and the second strip line metallic conductor 4 all has the characteristic impedance of 50 ohm, stub on first strip line metallic conductor 3 and the second strip line metallic conductor 4 provides capacitive compensation, to realize high-isolation on whole working band and low standing wave performance.
Two strip line metallic conductors are suspended in the cavity of metal shell and cover plate formation, signal energy produces coupling by gap between two strip line metallic conductors, strip line metallic conductor is connected by screw microwave junction, and the capacitive of strip line metallic conductor is protruded to realize broadband high-isolation performance.
In sum, coupler of the present invention adopts certain thickness metal band-shaped line to be suspended in air cavity, and insertion loss is low, input standing wave is little, isolation is high, and ripple is little and to bear power high, realizes high-isolation in broadband, low standing wave and low passive inter-modulation performance.Use screw connecting components, and adopt debugging screw, improve the reliability of passive intermodulation, reduce complexity and the cost of assembling and debugging, be easy to large-scale production.
It is emphasized that: be only preferred embodiment of the present invention above, not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. high-isolation low passive intermodulation 3dB directional coupler, comprise housing and the microwave junction being connected to its sidewall, it is characterized in that: in the cavity of described housing, suspension has two strip line metallic conductors, between two strip line metallic conductors, there is sheet medium supporter and fixed by medium securing member, being connected on housing by screw attachment cover plate between described two strip line metallic conductors and microwave junction and forming airtight cavity.
2. high-isolation according to claim 1 low passive intermodulation 3dB directional coupler, is characterized in that: described strip line metallic conductor is made up of more piece, and joint has capacitive character with the connection place of joint and protrudes.
3. high-isolation according to claim 1 low passive intermodulation 3dB directional coupler, is characterized in that: the center conductor end of described microwave junction is semi-cylindrical in configuration, provides the plane connected with strip line metallic conductor.
4. high-isolation according to claim 1 low passive intermodulation 3dB directional coupler, is characterized in that: described sheet medium supporter is disc-shaped plastic support thing.
5. high-isolation according to claim 1 low passive intermodulation 3dB directional coupler, is characterized in that: described medium securing member is plastic screw.
6. high-isolation according to claim 1 low passive intermodulation 3dB directional coupler, is characterized in that: described cover plate is provided with screwed hole, is connected with debugging screw in screwed hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410536316.2A CN104282976A (en) | 2014-10-13 | 2014-10-13 | 3dB directional coupler high in isolation and low in passive intermodulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410536316.2A CN104282976A (en) | 2014-10-13 | 2014-10-13 | 3dB directional coupler high in isolation and low in passive intermodulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104282976A true CN104282976A (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410536316.2A Pending CN104282976A (en) | 2014-10-13 | 2014-10-13 | 3dB directional coupler high in isolation and low in passive intermodulation |
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| CN (1) | CN104282976A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546443A (en) * | 2016-06-28 | 2018-01-05 | 广州司南天线设计研究所有限公司 | A kind of asymmetric medium block debugging apparatus of dielectric phase shifter |
| CN107565193A (en) * | 2016-06-30 | 2018-01-09 | 广州司南天线设计研究所有限公司 | A kind of symmetrical medium block debugging apparatus of dielectric phase shifter |
| CN108649309A (en) * | 2018-05-18 | 2018-10-12 | 斯必能通讯器材(上海)有限公司 | A kind of adjustable input coupling structure in filter product |
-
2014
- 2014-10-13 CN CN201410536316.2A patent/CN104282976A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546443A (en) * | 2016-06-28 | 2018-01-05 | 广州司南天线设计研究所有限公司 | A kind of asymmetric medium block debugging apparatus of dielectric phase shifter |
| CN107546443B (en) * | 2016-06-28 | 2023-10-24 | 广州司南技术有限公司 | Asymmetric dielectric block debugging device of dielectric phase shifter |
| CN107565193A (en) * | 2016-06-30 | 2018-01-09 | 广州司南天线设计研究所有限公司 | A kind of symmetrical medium block debugging apparatus of dielectric phase shifter |
| CN107565193B (en) * | 2016-06-30 | 2023-08-25 | 广州司南技术有限公司 | Medium block debugging device with symmetrical medium phase shifter |
| CN108649309A (en) * | 2018-05-18 | 2018-10-12 | 斯必能通讯器材(上海)有限公司 | A kind of adjustable input coupling structure in filter product |
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Application publication date: 20150114 |
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| RJ01 | Rejection of invention patent application after publication |