CN102780056B - Directional coupler with main and auxiliary rectangular coaxial lines - Google Patents
Directional coupler with main and auxiliary rectangular coaxial lines Download PDFInfo
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- CN102780056B CN102780056B CN201210282593.6A CN201210282593A CN102780056B CN 102780056 B CN102780056 B CN 102780056B CN 201210282593 A CN201210282593 A CN 201210282593A CN 102780056 B CN102780056 B CN 102780056B
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Abstract
The invention discloses a directional coupler with main and auxiliary rectangular coaxial lines. The directional coupler comprises a main rectangular coaxial line, an auxiliary rectangular coaxial line and coupling holes, wherein the main rectangular coaxial line serves as a microwave main channel, the auxiliary rectangular coaxial line serves as a sampling signal channel, and the coupling holes serve as coupling channels; the main rectangular coaxial line and the auxiliary rectangular coaxial line are mutually isolated, and the main rectangular coaxial line is communicated with the auxiliary rectangular coaxial line through one or two coupling holes, at least one coupling hole comprises a coupling tube attached to the side wall of the main rectangular coaxial line or/and the side wall of the auxiliary rectangular coaxial line, a coupling cavity is connected to the side wall close to the main rectangular coaxial line on the hollow coupling tube, provided with openings at three ends, communicated with the hollow coupling tube, and arranged between and communicated with the main rectangular coaxial line and the auxiliary rectangular coaxial line; and the main and auxiliary rectangular coaxial lines are in different sizes. The directional coupler has the advantages of being compact in structure, provided with an ultra wide operation bandwidth, low in insertion loss and large in power capacity.
Description
Technical field
The present invention relates to the directional coupler of major-minor rectangular coaxial line, specifically, relate to a kind of directional coupler that utilizes the major-minor rectangular coaxial line that single hole or diplopore 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 structure directional coupler, widely different, but from their coupling mechanism, be mainly divided into four kinds, 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 mostly also is Waveguide Hole coupling directional coupler; Its theoretical foundation is Bethe slot-coupling theory, and the people such as Cohn and Levy have also done a lot of contributions.
Development along with aerospace technology, require microwave circuit and system to accomplish miniaturization, lightweight and dependable performance, so there is strip line and microstrip line, in succession there is again the microwave integrated transmission-lines such as fin line, the line of rabbet joint, co-planar waveguide and coplanar stripline in the needs due to microwave circuit and system subsequently, so just occurred various transmission line directional couplers.
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 in narrow bandwidth, directivity, only suitable in the work of design frequency place, drift out this frequency, and directivity will reduce.
Although tradition multi-hole directional coupler can be accomplished very wide bandwidth, also exists some shortcomings, as large in volume, requirement on machining accuracy is high, insertion loss is high, particularly at millimeter wave terahertz wave band, too high Insertion Loss makes this device lose use value; This just encourages us to remove to design a kind of Novel directional coupler that can overcome these shortcomings.
Summary of the invention
The object of the invention is to overcome some shortcomings of traditional directional coupler, the directional coupler of a kind of compact, major-minor rectangular coaxial line that insertion loss is low is provided.
To achieve these goals, the technical solution used in the present invention is as follows: comprise main rectangular coaxial line that structure is identical and secondary rectangular coaxial line and as the coupling aperture of coupling channel; Main rectangular coaxial line is as microwave main channel, and secondary rectangular coaxial line is as sampled signal passage, and wherein, main rectangular coaxial line comprises outer conductor and is arranged on outer conductor inside and the inner wire of axis and outer conductor dead in line; 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 outer conductor sidewall or and the hollow tube coupling of secondary rectangular coaxial line outer conductor sidewall, hollow tube coupling is connected with the coupling cavity of three end openings near the sidewall of main rectangular coaxial line outer conductor, coupling cavity and the conducting of hollow tube coupling, coupling cavity between main rectangular coaxial line outer conductor and secondary rectangular coaxial line outer conductor and with main rectangular coaxial line and secondary rectangular coaxial line conducting
;
The size Expressing of main rectangular coaxial line is: a1*h1, the size Expressing of secondary rectangular coaxial line is: a2*h2, a1, a2 are expressed as the outer conductor width of main rectangular coaxial line and the outer conductor width of secondary rectangular coaxial line, and h1, h2 are expressed as the outer conductor height of main rectangular coaxial line and the outer conductor height of secondary rectangular coaxial line;
The size situation of the size of main rectangular coaxial line and secondary rectangular coaxial line is as follows:
situation A: whenwhen the size of main rectangular coaxial line is greater than the size of secondary rectangular coaxial line,
H2*10% < h1 < h2*80% or and a2*10% < a1 < a2*80%;
situation B: whenwhen the size of main rectangular coaxial line is less than the size of secondary rectangular coaxial line,
H1*10% < h2 < h1*80% or and a1*10% < a2 < a1*80%;
situation C:when the size of main rectangular coaxial line equals the size of secondary rectangular coaxial line,
A1=a2 and h1=h2.
Hollow tube coupling be attached to main rectangular coaxial line outer conductor sidewall or and hollow tube coupling be attached to the outer conductor sidewall of secondary rectangular coaxial line.
The projection of shape that coupling cavity is overlooked direction at it is circle or polygon.
Compare with traditional single-hole directional coupler, improvement of the present invention is: 1, the position of traditional coupling aperture is adjusted, design accordingly and the coupling aperture of adjusting rear structure and matching, be that coupling aperture in the present invention is comprised of coupling cavity and hollow tube coupling, wherein during setting position, coupling cavity is arranged between main rectangular coaxial line and secondary rectangular coaxial line, in order to be communicated with main rectangular coaxial line and secondary rectangular coaxial line, owing to being also provided with hollow tube coupling, can further strengthen coupling; 2, the present invention can also increase an above-mentioned coupling aperture consisting of coupling cavity and hollow tube coupling on the basis of existing single-hole directional coupler, or directly increase by two coupling apertures after improvement, replace original coupling aperture, the coupling between waveguide is enhanced; 3, because experiment is found, when we adopt common main rectangular coaxial line and secondary rectangular coaxial line to design, the directivity of ordinary construction is than the good directionality of normal structure, therefore, the main rectangular coaxial line and the secondary rectangular coaxial line that in the present invention, adopt adjust aspect size, the directivity of increase coupler that can be extra.
Therefore, while designing, two coupling apertures are preferentially set, and the hollow tube coupling in coupling aperture be attached to main rectangular coaxial line outer conductor sidewall or and hollow tube coupling be attached to the outer conductor sidewall of secondary rectangular coaxial line.Further preferentially be set to: main rectangular coaxial line and secondary rectangular coaxial line adjust aspect size, specifically adjust parameter according to setting parameters such as the directivity of this directional coupler, slotting insertion loss.
While being coupled output according to the above-mentioned coupler of being preferentially arranged to, its course of work is: microwave is first by main rectangular coaxial line, while locating in structure Coupling hole, by coupling cavity, microwave coupling is arrived to secondary rectangular coaxial line, under the effect of hollow tube coupling, add close coupling, make its directivity grow, further adjust the size of main rectangular coaxial line and secondary rectangular coaxial line; Therefore reinforcement can also further be coupled on the above-mentioned basis that adds close coupling.
In described coupling aperture, be provided with the metal column that axis is vertical with the axis of main rectangular coaxial line.
The cross section of this metal column be shaped as polygon, preferentially select rectangle.
Angle between the axis of described main rectangular coaxial line and the axis of secondary rectangular coaxial line is between 0 ° 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 after overlooking direction projection, intersects near two relative summits of the parallelogram forming with secondary rectangular coaxial line.
Described main rectangular coaxial line or and the one or both ends of secondary rectangular coaxial line be also connected with curved waveguide.
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 present invention compared to its improvement of single-hole directional coupler is in the past: adopt identical rectangular coaxial line structure to be improved to tradition and adopt ordinary rectangular coaxial line structure, the size situation of the size of main rectangular coaxial line and secondary rectangular coaxial line is as follows:
situation A: whenwhen the size of main rectangular coaxial line is greater than the size of secondary rectangular coaxial line,
H2*10% < h1 < h2*80% or and a2*10% < a1 < a2*80%;
situation B: whenwhen the size of main rectangular coaxial line is less than the size of secondary rectangular coaxial line,
H1*10% < h2 < h1*80% or and a1*10% < a2 < a1*80%;
situation C:when the size of main rectangular coaxial line equals the size of secondary rectangular coaxial line,
A1=a2 and h1=h2.
Can increase its directivity like this.
The general axis of main rectangular coaxial line and the angle between the axis of secondary rectangular coaxial line are between 0 ° to 180 °.For the volume of its whole coupler is reduced, we pay the utmost attention to the axis of main rectangular coaxial line and the axis of secondary rectangular coaxial line be arranged in parallel, the angle between the axis of main rectangular coaxial line and the axis of secondary rectangular coaxial line is 0 ° or 180 °, meanwhile, the angular dimension between the axis of its main rectangular coaxial line and the axis of secondary rectangular coaxial line is determined through optimizing according to indexs such as the degree of coupling of this directional coupler, directivity and bandwidth of operation.
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 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 metal column, described coupling aperture 3 is in-line or Y-shaped or cross and other starlike more than 4 branches in the projection of shape of overlooking direction.
As further improvement, coupling aperture in the present invention comprise be attached to main rectangular coaxial line sidewall or and the hollow tube coupling of secondary rectangular coaxial line sidewall, 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
.
The operation principle of guide directional coupler can be described below:
Because waveguide inwall can be similar to, regard ideal conducting plane as, 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, reaches 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 aperture place, pierces into and passes the full curve that complementary wave is led.
By aperture, entering that a part of electric field that complementary wave leads leads 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.
By aperture, entering that a part of magnetic field that complementary wave leads leads 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 inducting
', electricity, magnetic field alternately excites, and forms respectively the electromagnetic wave to coupled end and isolation end output.
Aperture coupling is above-mentioned electric coupling and magnetic-coupled stack, and the electromagnetic wave two kinds of couplings being 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 transmitting toward 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 invention has the advantages that: 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, compare with common single-hole directional coupler, aspect the degree of coupling and directivity, there is outstanding advantage.The directional coupler of compact major-minor rectangular coaxial line of the present invention is expected to be widely used in the electronic system of each microwave band and terahertz wave band, particularly military affairs and the civil area such as radar, missile guidance, communication.
Accompanying drawing explanation
Fig. 1 is the axis of main rectangular coaxial line and the stereogram of the axis of secondary rectangular coaxial line when parallel in the present invention.
Fig. 2 is the structural perspective of coupling aperture.
Fig. 3 is the vertical view of the embodiment of the present invention one.
Fig. 4 is A-A profile in the embodiment of the present invention one.
Fig. 5 is the vertical view of the embodiment of the present invention two.
Fig. 6 is the vertical view of the embodiment of the present invention three.
The vertical view of Fig. 7 embodiment of the present invention four.
Label in figure is expressed as: 1, main rectangular coaxial line; 2, secondary rectangular coaxial line; 3, coupling aperture; 31, coupling cavity; 32, hollow tube coupling; 7, metal column; 4, crooked coaxial line; 5, rectangular coaxial line.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiment of the present invention is not limited to this.
As shown in Figure 1, 2, the directional coupler of major-minor rectangular coaxial line, comprises 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 is communicated with secondary rectangular coaxial line 2 by 1 coupling aperture 3, 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 main rectangular coaxial line 1, coupling cavity 31 and 32 conductings of hollow tube coupling, coupling cavity position 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 size situation of the size of main rectangular coaxial line 1 and secondary rectangular coaxial line 2 is as follows:
situation A: whenwhen the size of main rectangular coaxial line is greater than the size of secondary rectangular coaxial line,
H2*10% < h1 < h2*80% or and a2*10% < a1 < a2*80%;
situation B: whenwhen the size of main rectangular coaxial line is less than the size of secondary rectangular coaxial line,
H1*10% < h2 < h1*80% or and a1*10% < a2 < a1*80%;
situation C:when the size of main rectangular coaxial line equals the size of secondary rectangular coaxial line,
A1=a2 and h1=h2.
The projection of shape that 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: adopt identical rectangular coaxial line structure to be improved to tradition and adopt ordinary rectangular coaxial line structure, the size situation of the size of main rectangular coaxial line and secondary rectangular coaxial line is as follows:
situation A: whenwhen the size of main rectangular coaxial line is greater than the size of secondary rectangular coaxial line,
H2*10% < h1 < h2*80% or and a2*10% < a1 < a2*80%;
situation B: whenwhen the size of main rectangular coaxial line is less than the size of secondary rectangular coaxial line,
H1*10% < h2 < h1*80% or and a1*10% < a2 < a1*80%;
situation C:when the size of main rectangular coaxial line equals the size of secondary rectangular coaxial line,
A1=a2 and h1=h2.
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 microwave main channel, and secondary rectangular coaxial line 2 is sampled signal passage; Angle between the axis of main rectangular coaxial line and the axis of secondary rectangular coaxial line is between 0 ° to 180 °, and main rectangular coaxial line 1 and secondary rectangular coaxial line 2 are isolated mutually, only by 1 coupling aperture, is communicated with; What secondary rectangular coaxial line 2 adopted is ordinary rectangular coaxial line structure, and the outer conductor width a2 of secondary rectangular coaxial line 2 meets: a1*10% < a2 < a1*80%, and wherein a1 is the outer conductor width of main rectangular coaxial line 1; A part for coupling aperture 3 is beyond main rectangular coaxial line 1 or secondary rectangular coaxial line 2.In coupling aperture 3, add the metal column 7 that another axis is vertical with the axis of main rectangular coaxial line 1, the cross section of this metal column 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 the axis of 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.Metal column 7 is not set in coupling aperture 3.
Embodiment tri-
As shown in Figure 6, the place different from embodiment bis-is by 2 coupling apertures 3, to be communicated with between main rectangular coaxial line 1 and secondary rectangular coaxial line 2, and the center of two coupling apertures 3 lays respectively near two relative summits of main rectangular coaxial line 1 and the secondary rectangular coaxial line 2 crossing parallelogram that form.
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, at the two ends of main rectangular coaxial line 1, there is the transition of curved waveguide 4, the other end at curved waveguide 4 is connecting rectangular waveguide 5, can obtain like this directional coupler of the major-minor rectangular coaxial line that directivity is better, bandwidth is wider.
Just can realize preferably the present invention as mentioned above.
Claims (8)
1. the directional coupler of major-minor rectangular coaxial line, is characterized in that: comprise main rectangular coaxial line (1) that structure is identical and secondary rectangular coaxial line (2) and as the coupling aperture (3) of coupling channel, main rectangular coaxial line (1) is as microwave main channel, and secondary rectangular coaxial line (2) is as sampled signal passage, and wherein, main rectangular coaxial line (1) comprises outer conductor and is arranged on outer conductor inside and the inner wire of axis and outer conductor dead in line, 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) outer conductor sidewall or and the hollow tube coupling (32) of secondary rectangular coaxial line (2) outer conductor sidewall, hollow tube coupling (32) is connected with the coupling cavity (31) of three end openings near the sidewall of main rectangular coaxial line (1) outer conductor, coupling cavity (31) and hollow tube coupling (32) conducting, coupling cavity (31) be positioned between main rectangular coaxial line (1) outer conductor and secondary rectangular coaxial line (2) outer conductor and with main rectangular coaxial line (1) and secondary rectangular coaxial line (2) conducting,
The size Expressing of main rectangular coaxial line (1) is: a1*h1, the size Expressing of secondary rectangular coaxial line (2) is: a2*h2, a1, a2 are expressed as the outer conductor width of main rectangular coaxial line (1) and the outer conductor width of secondary rectangular coaxial line (2), and h1, h2 are expressed as the outer conductor height of main rectangular coaxial line (1) and the outer conductor height of secondary rectangular coaxial line (2);
The size situation of the size of main rectangular coaxial line (1) and secondary rectangular coaxial line (2) is as follows:
Situation A: when the size of main rectangular coaxial line (1) is less than the size of secondary rectangular coaxial line (2),
H2*10% < h1 < h2*80% or and a2*10% < a1 < a2*80%;
Situation B: when the size of main rectangular coaxial line (1) is greater than the size of secondary rectangular coaxial line (2),
H1*10% < h2 < h1*80% or and a1*10% < a2 < a1*80%;
Situation C: when the size of main rectangular coaxial line (1) equals the size of secondary rectangular coaxial line (2),
A1=a2 and h1=h2.
2. the directional coupler of major-minor rectangular coaxial line according to claim 1, is characterized in that: the projection of shape that coupling cavity is overlooked direction at it is circle or polygon.
3. the directional coupler of major-minor rectangular coaxial line according to claim 1, is characterized in that: in described coupling aperture (3), be provided with the metal column (7) that axis is vertical with the axis of main rectangular coaxial line (1).
4. the directional coupler of major-minor rectangular coaxial line according to claim 3, is characterized in that: the cross section of this metal column (7) be shaped as polygon.
5. the directional coupler of major-minor rectangular coaxial line according to claim 1, is characterized in that: the angle between the axis of described main rectangular coaxial line (1) and the axis of secondary rectangular coaxial line (2) is 0 ° to 180 °.
6. the directional coupler of major-minor rectangular coaxial line according to claim 1, it is characterized in that: the number of described coupling aperture (3) is 2 o'clock, the center of two coupling apertures (3) lays respectively at main rectangular coaxial line (1) and after overlooking direction projection, intersects near two relative summits of the parallelogram forming with secondary rectangular coaxial line (2).
7. according to the directional coupler of the major-minor rectangular coaxial line described in any one in claim 1-6, it is characterized in that: described main rectangular coaxial line (1) or and the one or both ends of secondary rectangular coaxial line (2) be also connected with curved waveguide (4).
8. according to the directional coupler of the major-minor rectangular coaxial line described in 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282593.6A CN102780056B (en) | 2012-08-10 | 2012-08-10 | Directional coupler with main and auxiliary rectangular coaxial lines |
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|---|---|---|---|
| CN201210282593.6A CN102780056B (en) | 2012-08-10 | 2012-08-10 | Directional coupler with main and auxiliary rectangular coaxial lines |
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| CN102780056B true CN102780056B (en) | 2014-04-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050751A (en) * | 2013-01-14 | 2013-04-17 | 成都赛纳赛德科技有限公司 | Dual-hole wave guide type directional filter |
| CN112798873B (en) * | 2020-12-30 | 2022-10-28 | 中国原子能科学研究院 | End coupling cavity measuring device and end coupling cavity measuring method for coupling cavity accelerating structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2532317A (en) * | 1947-08-25 | 1950-12-05 | Sperry Corp | Ultra high frequency coupler |
| GB801323A (en) * | 1956-01-05 | 1958-09-10 | Marconi Wireless Telegraph Co | Improvements in or relating to directional high frequency couplers |
| JP2006108964A (en) * | 2004-10-04 | 2006-04-20 | Aica Kogyo Co Ltd | Directional coupler substrate and electrical characteristic evaluation apparatus for substance utilizing the same |
| CN202678494U (en) * | 2012-08-10 | 2013-01-16 | 成都赛纳赛德科技有限公司 | Directional coupler with main and auxiliary rectangular coaxial lines different in size |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5119051A (en) * | 1991-05-20 | 1992-06-02 | At&T Bell Laboratories | Cavity-tuning coaxial coupler unit |
| CN201134493Y (en) * | 2007-12-27 | 2008-10-15 | 奥雷通光通讯设备（上海）有限公司 | Novel directional coupler |
| CN202308253U (en) * | 2011-10-19 | 2012-07-04 | 成都赛纳赛德科技有限公司 | Waveguide ring coupler |
-
2012
- 2012-08-10 CN CN201210282593.6A patent/CN102780056B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2532317A (en) * | 1947-08-25 | 1950-12-05 | Sperry Corp | Ultra high frequency coupler |
| GB801323A (en) * | 1956-01-05 | 1958-09-10 | Marconi Wireless Telegraph Co | Improvements in or relating to directional high frequency couplers |
| JP2006108964A (en) * | 2004-10-04 | 2006-04-20 | Aica Kogyo Co Ltd | Directional coupler substrate and electrical characteristic evaluation apparatus for substance utilizing the same |
| CN202678494U (en) * | 2012-08-10 | 2013-01-16 | 成都赛纳赛德科技有限公司 | Directional coupler with main and auxiliary rectangular coaxial lines different in size |
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