CN202839931U - Directional coupler with rectangular coaxial lines - Google Patents
Directional coupler with rectangular coaxial lines Download PDFInfo
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- CN202839931U CN202839931U CN 201220393942 CN201220393942U CN202839931U CN 202839931 U CN202839931 U CN 202839931U CN 201220393942 CN201220393942 CN 201220393942 CN 201220393942 U CN201220393942 U CN 201220393942U CN 202839931 U CN202839931 U CN 202839931U
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- coaxial line
- rectangular coaxial
- coupling
- main
- directional coupler
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Abstract
The utility model discloses a directional coupler with rectangular coaxial lines, which comprises a main rectangular coaxial line, an auxiliary rectangular coaxial line and coupling holes. The main rectangular coaxial line serves as a microwave main channel, and the auxiliary rectangular coaxial line serves as a sampling signal channel. The coupling holes serve as coupling channels. The main rectangular coaxial line and the auxiliary rectangular coaxial line are isolated from each other. The main rectangular coaxial line is communicated with the auxiliary rectangular coaxial line after passing through one or two coupling holes. At least one coupling hole comprises a hollow coupling tube attached to the side wall of the main rectangular coaxial line or/and the side wall of the auxiliary rectangular coaxial line. The side wall of the hollow coupling tube, which is close to the rectangular coaxial lines, is connected with a coupling cavity with three open ends. The coupling cavity is communicated with the hollow coupling tube. The coupling cavity positioned between the main rectangular coaxial line and the auxiliary rectangular coaxial line is communicated with the main rectangular coaxial line and the auxiliary rectangular coaxial line. The directional coupler has the advantages of compact structure, ultra-large working bandwidth, large power capacity and low insertion loss. Compared with a conventional porous directional coupler, the above directional coupler has an obvious comparative advantage in low insertion loss.
Description
Technical field
The utility model relates to the rectangular coaxial line directional coupler, specifically, relates to a kind of rectangular coaxial line directional coupler that utilizes single hole or diplopore to be coupled.
Background technology
Directional coupler is widely used a kind of microwave device in microwave system, and its Main Function is that microwave signal is carried out to power division according to a certain percentage; Directional coupler consists of two transmission lines, and coaxial line, rectangular waveguide, circular waveguide, strip line and microstrip line etc. all can form directional coupler; So of a great variety from the structure directional coupler, widely different, but mainly be divided into four kinds from their coupling mechanism, i.e. aperture coupling, parallel coupling, branch's coupling and coupling double T.
Before early 1950s, nearly all microwave equipment all adopts metal waveguide and waveguide circuit, and directional coupler at that time also mostly is the Waveguide Hole coupling directional coupler; Its theoretical foundation is the Bethe slot-coupling theory, and the people such as Cohn and Levy have also done a lot of contributions.
Development along with the aerospace technology, require microwave circuit and system to accomplish miniaturization, lightweight and dependable performance, so strip line and microstrip line have occurred, the microwave integrated transmission-lines such as fin line, the line of rabbet joint, co-planar waveguide and coplanar stripline have appearred again in needs due to microwave circuit and system in succession subsequently, various transmission line directional couplers so just occurred.
The tradition single-hole directional coupler has some advantage: as simple in structure, parameter is few, design is got up more convenient; But it also exists some shortcomings: as poor as narrow bandwidth, directivity, only suitable in the work of design frequency place, drift out this frequency, and directivity will reduce.
Although the tradition multi-hole directional coupler can be accomplished very wide bandwidth, but also exist some shortcomings, as large as volume, requirement on machining accuracy is high, insertion loss is high, particularly, at the millimeter wave terahertz wave band, too high Insertion Loss makes this device lose use value. and this just encourages us to remove to design a kind of Novel directional coupler that can overcome these shortcomings.
The utility model content
The purpose of this utility model is to overcome some shortcomings of traditional directional coupler, and a kind of compact, rectangular coaxial line directional coupler that insertion loss is low are provided.
To achieve these goals, the technical solution adopted in the utility model is as follows: the rectangular coaxial line directional coupler comprises as the main rectangular coaxial line of microwave main channel with as the secondary rectangular coaxial line of sampled signal passage and as the coupling aperture of coupling channel; Main rectangular coaxial line and secondary rectangular coaxial line are isolated mutually; Main rectangular coaxial line is communicated with secondary rectangular coaxial line by 1 or 2 coupling apertures, at least 1 coupling aperture comprise be attached to main rectangular coaxial line sidewall or and the hollow tube coupling of secondary rectangular coaxial line sidewall, the hollow tube coupling is connected with the coupling cavity of three end openings near the sidewall of rectangular coaxial line, coupling cavity and the conducting of hollow tube coupling, coupling cavity between main rectangular coaxial line and secondary rectangular coaxial line and with main rectangular coaxial line and secondary rectangular coaxial line conducting
.
The projection of shape that coupling aperture is overlooked direction at it is circle or polygon.
Be provided with parallel with the axis of coupling aperture and vertical with the axis of the main rectangular coaxial line cylindrical metal structure of axis in described coupling aperture.
The cross section of this cylindrical metal structure be shaped as triangle, preferentially select rectangle.
Angle between the axis of described main rectangular coaxial line and the axis of secondary rectangular coaxial line is between 30 ° to 180 °.
The number of described coupling aperture is 2 o'clock, and the center of two coupling apertures lays respectively at main rectangular coaxial line and intersects after overlooking direction projection near two relative summits of the parallelogram formed with secondary rectangular coaxial line.
The one or both ends of described main rectangular coaxial line also are connected with crooked coaxial line.
Described main rectangular coaxial line Huo and secondary rectangular coaxial line are connected with the matching structure with extraneous device matching in its one or both ends.
Based on said structure, the utility model compared to its improvement of single-hole directional coupler in the past is: traditional coupling aperture is improved to the coupling channel be comprised of coupling cavity and hollow tube coupling, wherein coupling cavity is arranged between main rectangular coaxial line and secondary rectangular coaxial line, the hollow tube coupling be attached to main rectangular coaxial line sidewall or and secondary rectangular coaxial line sidewall; Can increase its directivity like this.
Angle between the axis of general main rectangular coaxial line and the axis of secondary rectangular coaxial line is between 30 ° to 180 °.Simultaneously, the angular dimension between the axis of the axis of its main rectangular coaxial line and secondary rectangular coaxial line is determined through optimizing according to the indexs such as the degree of coupling, directivity and bandwidth of operation of this directional coupler.
When the number of coupling aperture is 1, compare single hole coupler in the past, performance has obvious progress, when the number of coupling aperture increases to 2, can further improve its directivity, now we need to make the hollow tube coupling be attached to main rectangular coaxial line sidewall or and secondary rectangular coaxial line sidewall could improve its directivity.
The projection of shape that coupling aperture is overlooked direction at it is unrestricted, and when considering cost of manufacture, we pay the utmost attention to circle or triangle or the quadrangle of the simple and easy batch production of energy.
While increasing the cylindrical metal structure, described coupling aperture is in-line or Y-shaped or cross and other starlike more than 4 branches in the projection of shape of overlooking direction.
The operation principle of rectangular coaxial line directional coupler can be described below:
Regard the ideal conducting plane as because the waveguide inwall can be similar to, according to the boundary condition of alternating electromagnetic field, ideal conducting plane E only has the component perpendicular with surface, there is no tangential component; Magnetic field H only has the component tangent with surface, there is no normal component.The public broadside of the vertical major-minor waveguide of main waveguide internal electric field, reach that a part of electric field that complementary wave leads still vertical and the public broadside of major-minor waveguide, an elbow of its power line formation by aperture.Magnetic field (magnetic line of force) is for being parallel to the closed curve of main Guide of Wide Wall, therefore the magnetic field of main waveguide (magnetic line of force) forms one group at the aperture place, pierces into and passes the full curve that complementary wave is led.
Entering by aperture that a part of electric field that complementary wave leads leads the coupling aperture both sides at complementary wave and is coupled out electric field E vertically downward
', the electric field E of alternation
'inspire Induced magnetic field H
'(direction is determined by S=E*H), electricity, magnetic field alternately excites, and forms respectively the electromagnetic wave to coupled end and isolation end output.
Entering by aperture that a part of magnetic field that complementary wave leads leads the coupling aperture both sides at complementary wave and is coupled out level magnetic field H to the right
', the magnetic field H of alternation
'inspire the electric field E inducted
', electricity, magnetic field alternately excites, and forms respectively the electromagnetic wave to coupled end and isolation end output.
The aperture coupling is above-mentioned electric coupling and magnetic-coupled stack, and the electromagnetic wave two kinds of couplings formed merges, and we can find out that the electromagnetic wave of past coupled end direction transmission superposes in the same way, forms coupling output; The electromagnetic wave transmitted toward the isolation end direction oppositely superposes, and cancels out each other and forms isolation, so be to export without coupling in principle; But, due to aperture electricity, magnetic-coupled asymmetry, both superpose and have produced directivity.
The utility model has the advantage of: compact conformation, process simple, super wide bandwidth of operation, power capacity is large, insertion loss is low, particularly at millimeter wave and terahertz wave band, with common single-hole directional coupler, compares, and aspect filter with low insertion loss, has outstanding advantage.Compact rectangular coaxial line directional coupler of the present utility model is expected to be widely used in the electronic system of each microwave band and terahertz wave band, particularly military affairs and the civil areas such as radar, missile guidance, communication.
The accompanying drawing explanation
The structural perspective when axis that Fig. 1 is main rectangular coaxial line in the utility model and secondary rectangular coaxial line parallel.
The structural perspective that Fig. 2 is coupling aperture.
The vertical view that Fig. 3 is the utility model embodiment mono-.
Fig. 4 is A in the utility model embodiment mono--A profile.
The vertical view that Fig. 5 is the utility model embodiment bis-.
The vertical view that Fig. 6 is the utility model embodiment tri-.
The vertical view of Fig. 7 the utility model embodiment tetra-.
Label in figure is expressed as respectively: 1, main rectangular coaxial line; 2, secondary rectangular coaxial line; 3, coupling aperture; 31, coupling cavity; 32, hollow tube coupling; 7, cylindrical metal structure; 4, crooked coaxial line; 5, rectangular coaxial line.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but the utility model execution mode is not limited to this.
As shown in Figure 1, 2, the rectangular coaxial line directional coupler, comprise as the main rectangular coaxial line 1 of microwave main channel with as the secondary rectangular coaxial line 2 of sampled signal passage and as the coupling aperture 3 of coupling channel; Main rectangular coaxial line 1 and secondary rectangular coaxial line 2 are isolated mutually, main rectangular coaxial line 1 is communicated with secondary rectangular coaxial line 2 by 1 or 2 coupling apertures 3, at least 1 coupling aperture 3 comprise be attached to main rectangular coaxial line 1 sidewall or and the hollow tube coupling 32 of secondary rectangular coaxial line 2 sidewalls, hollow tube coupling 32 is connected with the coupling cavity 31 of three end openings near the sidewall of rectangular coaxial line 1, coupling cavity 31 and 32 conductings of hollow tube coupling, coupling cavity 31 between main rectangular coaxial line 1 and secondary rectangular coaxial line 2 and with main rectangular coaxial line 1 and 2 conductings of secondary rectangular coaxial line
.the projection of shape that wherein coupling aperture 3 is overlooked direction at it is for circular, and the axis of the axis of main rectangular coaxial line 1 and secondary rectangular coaxial line 2 is parallel to each other.
Compared to its improvement of single-hole directional coupler in the past, be: traditional coupling aperture is improved to the coupling channel formed by coupling cavity 31 and hollow tube coupling 32, wherein coupling cavity 31 is arranged between main rectangular coaxial line 1 and secondary rectangular coaxial line 2, hollow tube coupling 32 be attached to main rectangular coaxial line 1 sidewall or and secondary rectangular coaxial line sidewall.Can increase its directivity like this.
Embodiment mono-
As shown in Figure 3,4, the present embodiment comprises and is provided with main rectangular coaxial line 1 and secondary rectangular coaxial line 2, and main rectangular coaxial line 1 is the microwave main channel, and secondary rectangular coaxial line 2 is the sampled signal passage; Main rectangular coaxial line 1 and secondary rectangular coaxial line 2 are isolated mutually, have 1 coupling aperture 3 to comprise to be attached to main rectangular coaxial line 1 sidewall or and the hollow tube coupling 32 of secondary rectangular coaxial line 2 sidewalls, hollow tube coupling 32 is connected with the coupling cavity 31 of three end openings near the sidewall of rectangular coaxial line 1, coupling cavity 31 and 32 conductings of hollow tube coupling, coupling cavity 31 between main rectangular coaxial line 1 and secondary rectangular coaxial line 2 and with main rectangular coaxial line 1 and 2 conductings of secondary rectangular coaxial line
.add parallel with the axis of coupling aperture 3 and vertical with the axis of the main rectangular coaxial line 1 cylindrical metal structure 7 of another axis in coupling aperture 3, the cross section of this cylindrical metal structure 7 be shaped as rectangle, can obtain so the better directional coupler of directivity.
Embodiment bis-
As shown in Figure 5, the place different from embodiment mono-is between main rectangular coaxial line 1 and secondary rectangular coaxial line 2 to be parallel, there is no angle.Coupling aperture 3 all only has part in main rectangular coaxial line 1 and secondary rectangular coaxial line 2 the insides, and some outside.Cylindrical metal structure 7 is not set in coupling aperture 3.
Embodiment tri-
As shown in Figure 6, the place different from embodiment mono-is by two coupling apertures 3, to be communicated with between main rectangular coaxial line 1 and secondary rectangular coaxial line 2, near the center of two coupling apertures 3 lays respectively at main rectangular coaxial line 1 and secondary rectangular coaxial line 2 intersects two relative summits of the parallelogram formed.
Embodiment tetra-
As shown in Figure 7, the place different from embodiment tri-is that main rectangular coaxial line 1 and 2 of secondary rectangular coaxial lines are communicated with by a coupling aperture 3, the transition of curved waveguide 4 is arranged at the two ends of main rectangular coaxial line 1, can obtain like this that directivity is better, the wider guide directional coupler of bandwidth, at the other end of crooked coaxial line 4, connect rectangular coaxial line 5.
Just can realize preferably the utility model as mentioned above.
Claims (8)
1. rectangular coaxial line directional coupler is characterized in that: comprise as the main rectangular coaxial line (1) of microwave main channel with as the secondary rectangular coaxial line (2) of sampled signal passage and as the coupling aperture (3) of coupling channel; Main rectangular coaxial line (1) and secondary rectangular coaxial line (2) be isolation mutually, wherein main rectangular coaxial line (1) is identical with the structure of secondary rectangular coaxial line (2), and main rectangular coaxial line (1) and secondary rectangular coaxial line (2) are by outer conductor and be arranged on outer conductor inside and the inner wire of axis and outer conductor dead in line formation; Main rectangular coaxial line (1) is communicated with secondary rectangular coaxial line (2) by 1 or 2 coupling apertures (3), at least 1 coupling aperture (3) comprises the hollow tube coupling (32) that is attached to outer conductor sidewall, hollow tube coupling (32) is connected with the coupling cavity (31) of three end openings near the sidewall of outer conductor, coupling cavity (31) and hollow tube coupling (32) conducting, coupling cavity (31) be positioned between main rectangular coaxial line (1) and secondary rectangular coaxial line (2) and with main rectangular coaxial line (1) and secondary rectangular coaxial line (2) conducting; Be provided with parallel with the axis of coupling aperture (3) and vertical with the axis of main rectangular coaxial line (1) the cylindrical metal structure (7) of axis in described coupling cavity (31).
2. rectangular coaxial line directional coupler according to claim 1, it is characterized in that: the angle between the axis of the axis of described main rectangular coaxial line (1) and secondary rectangular coaxial line (2) is between 30 ° to 180 °; The number of described coupling aperture (3) is 2 o'clock, and the center of two coupling apertures (3) lays respectively at main rectangular coaxial line (1) and intersects after overlooking direction projection near two relative summits of the parallelogram formed with secondary rectangular coaxial line (2).
3. rectangular coaxial line directional coupler according to claim 1 is characterized in that: the projection of shape that coupling aperture (3) is overlooked direction at it is for circular; The projection of shape that coupling cavity (31) is overlooked direction at it is for circular; Its projection of shape of overlooking direction of hollow tube coupling (32) is for semicircle.
4. rectangular coaxial line directional coupler according to claim 1, it is characterized in that: the projection of shape that coupling aperture (3) is overlooked direction at it is polygon; The projection of shape that coupling cavity (31) is overlooked direction at it is polygon; Its projection of shape of overlooking direction of hollow tube coupling (32) is for semicircle.
5. rectangular coaxial line directional coupler according to claim 1, it is characterized in that: the projection of shape that coupling aperture (3) is overlooked direction at it is polygon; The projection of shape that coupling cavity (31) is overlooked direction at it is polygon; Its projection of shape of overlooking direction of hollow tube coupling (32) is polygon.
6. rectangular coaxial line directional coupler according to claim 1 is characterized in that: the cross section of this cylindrical metal structure (7) be shaped as triangle or quadrangle or pentagon.
7. according to the described rectangular coaxial line directional coupler of any one in claim 1-6, it is characterized in that: the one or both ends of described main rectangular coaxial line (1) also are connected with crooked coaxial line (4).
8. according to the described rectangular coaxial line directional coupler of any one in claim 1-6, it is characterized in that: described main rectangular coaxial line (1) Huo and secondary rectangular coaxial line (2) are connected with the matching structure with extraneous device matching in its one or both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393942 CN202839931U (en) | 2012-08-10 | 2012-08-10 | Directional coupler with rectangular coaxial lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393942 CN202839931U (en) | 2012-08-10 | 2012-08-10 | Directional coupler with rectangular coaxial lines |
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| Publication Number | Publication Date |
|---|---|
| CN202839931U true CN202839931U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220393942 Withdrawn - After Issue CN202839931U (en) | 2012-08-10 | 2012-08-10 | Directional coupler with rectangular coaxial lines |
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| Country | Link |
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| CN (1) | CN202839931U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881982A (en) * | 2012-08-10 | 2013-01-16 | 成都赛纳赛德科技有限公司 | Rectangular coaxial line directional coupler |
| CN104377418A (en) * | 2014-11-06 | 2015-02-25 | 电子科技大学 | Terahertz multifunctional device based on integrated technology |
-
2012
- 2012-08-10 CN CN 201220393942 patent/CN202839931U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881982A (en) * | 2012-08-10 | 2013-01-16 | 成都赛纳赛德科技有限公司 | Rectangular coaxial line directional coupler |
| CN102881982B (en) * | 2012-08-10 | 2014-08-06 | 成都赛纳赛德科技有限公司 | Rectangular coaxial line directional coupler |
| CN104377418A (en) * | 2014-11-06 | 2015-02-25 | 电子科技大学 | Terahertz multifunctional device based on integrated technology |
| CN104377418B (en) * | 2014-11-06 | 2017-08-25 | 电子科技大学 | Terahertz multifunction device based on integrated technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130327 Effective date of abandoning: 20140806 |
|
| RGAV | Abandon patent right to avoid regrant |