CN202678494U - Directional coupler with main and auxiliary rectangular coaxial lines different in size - Google Patents
Directional coupler with main and auxiliary rectangular coaxial lines different in size Download PDFInfo
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- CN202678494U CN202678494U CN 201220394004 CN201220394004U CN202678494U CN 202678494 U CN202678494 U CN 202678494U CN 201220394004 CN201220394004 CN 201220394004 CN 201220394004 U CN201220394004 U CN 201220394004U CN 202678494 U CN202678494 U CN 202678494U
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Abstract
The utility model discloses a directional coupler with main and auxiliary rectangular coaxial lines different in size. The directional coupler comprises the main rectangular coaxial line serving as a microwave main channel, the auxiliary rectangular coaxial line serving as a sampling signal channel, and coupling holes serving as a coupling channel; 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 through one or two coupling holes; at least one coupling hole comprises a hollow coupling pipe 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 with three ends opened are connected to a side wall of the hollow coupling pipe and at the position close to the main rectangular coaxial line; the coupling cavity is communicated with the hollow coupling pipe, and is positioned between the main rectangular coaxial line and the auxiliary rectangular coaxial line and communicated with the main rectangular coaxial line and the auxiliary rectangular coaxial line; and the main rectangular coaxial line and the auxiliary rectangular coaxial line are different in size. The directional coupler has the advantages of compact structure, ultra-wide operation bandwidth, large power capacity and low insertion loss.
Description
Technical field
The utility model relates to the different directional coupler of major-minor rectangular coaxial linear dimension, specifically, relates to a kind of different directional coupler of major-minor rectangular coaxial linear dimension 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, also exists 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; 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, the different directional coupler of major-minor rectangular coaxial linear dimension that insertion loss is low are provided.
To achieve these goals, the technical solution adopted in the utility model 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 the microwave main channel, and secondary rectangular coaxial line is as the 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, the 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 respectively 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 respectively 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.
The hollow tube coupling be attached to main rectangular coaxial line outer conductor sidewall or and the 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.
With traditional single-hole directional coupler, compare, improvement of the present utility model is: 1, the position of traditional coupling aperture is adjusted, design accordingly and the coupling aperture of adjusting rear structure and being complementary, be that coupling aperture in the utility model 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 also being provided with the hollow tube coupling, can further strengthen coupling; 2, the utility model can also increase an above-mentioned coupling aperture consisted of coupling cavity and hollow tube coupling on the basis of existing single-hole directional coupler, perhaps 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 be designed, 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 utility model, adopt adjust aspect size, the directivity of increase coupler that can be extra.
Therefore, while designing, two coupling apertures preferentially are set, and the hollow tube coupling in coupling aperture be attached to main rectangular coaxial line outer conductor sidewall or and the 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 according to the above-mentioned coupler of preferentially being arranged to, being coupled output, its course of work is: microwave is at first by main rectangular coaxial line, while locating in the structure Coupling hole, by coupling cavity, microwave coupling is arrived to secondary rectangular coaxial line, added close coupling under the effect of hollow tube 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.
Be provided with the metal column that axis is vertical with the axis of main rectangular coaxial line in described coupling aperture.
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 intersects after overlooking direction projection near two relative summits of the parallelogram formed with secondary rectangular coaxial line.
Described main rectangular coaxial line or and the one or both ends of secondary rectangular coaxial line also be 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 utility model compared to its improvement of single-hole directional coupler in the past is: adopt the identical rectangular coaxial line structure to be improved to tradition and adopt the 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.
Angle between the axis of general main rectangular coaxial line and the axis of secondary rectangular coaxial line is between 0 ° to 180 °.For the volume that makes its whole coupler reduces, 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 the axis of main rectangular coaxial line and secondary rectangular coaxial line is 0 ° or 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 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 utility model 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 coupling cavity, coupling cavity and the conducting of hollow tube coupling of three end openings near the sidewall of rectangular coaxial line
.
The operation principle of guide 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, compare with common single-hole directional coupler, aspect the degree of coupling and directivity, there is outstanding advantage.The different directional coupler of compact major-minor rectangular coaxial linear dimension 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 stereogram when axis that Fig. 1 is main rectangular coaxial line in the utility model is parallel with the axis of secondary rectangular coaxial line.
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, metal column; 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 directional coupler that major-minor rectangular coaxial linear dimension is different, 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 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 the identical rectangular coaxial line structure to be improved to tradition and adopt the 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 the microwave main channel, and secondary rectangular coaxial line 2 is the 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 the 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; The part of coupling aperture 3 is beyond main rectangular coaxial line 1 or secondary rectangular coaxial line 2.Add the metal column 7 that another axis is vertical with the axis of main rectangular coaxial line 1 in coupling aperture 3, 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 the axis of 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.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, 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, the other end at curved waveguide 4 is connecting rectangular waveguide 5, can obtain like this that directivity is better, the wider different directional coupler of major-minor rectangular coaxial linear dimension of bandwidth.
Just can realize preferably the utility model as mentioned above.
Claims (9)
1. the different directional coupler of major-minor rectangular coaxial linear dimension 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 the microwave main channel, and secondary rectangular coaxial line (2) is as the 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) be isolation 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 respectively 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 respectively 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: whenwhen 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: whenwhen 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 different directional coupler of major-minor rectangular coaxial linear dimension according to claim 1, it is characterized in that: hollow tube coupling (32) is attached to the outer conductor sidewall Huo of main rectangular coaxial line (1) and the outer conductor sidewall that hollow tube coupling (32) is attached to secondary rectangular coaxial line (2).
3. the different directional coupler of major-minor rectangular coaxial linear dimension according to claim 1, it is characterized in that: the projection of shape that coupling cavity is overlooked direction at it is circle or polygon.
4. the different directional coupler of major-minor rectangular coaxial linear dimension according to claim 1, is characterized in that: be provided with the metal column (7) that axis is vertical with the axis of main rectangular coaxial line (1) in described coupling aperture (3).
5. the different directional coupler of major-minor rectangular coaxial linear dimension according to claim 3 is characterized in that: the cross section of this metal column (7) be shaped as polygon.
6. the different directional coupler of major-minor rectangular coaxial linear dimension 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 0 ° to 180 °.
7. the different directional coupler of major-minor rectangular coaxial linear dimension according to claim 1, it is characterized in that: 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).
8. according to the different directional coupler of the described major-minor rectangular coaxial of any one linear dimension in claim 1-7, it is characterized in that: the one or both ends of described main rectangular coaxial line (1) Huo and secondary rectangular coaxial line (2) also are connected with curved waveguide (4).
9. according to the different directional coupler of the described major-minor rectangular coaxial of any one linear dimension in claim 1-7, 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 201220394004 CN202678494U (en) | 2012-08-10 | 2012-08-10 | Directional coupler with main and auxiliary rectangular coaxial lines different in size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220394004 CN202678494U (en) | 2012-08-10 | 2012-08-10 | Directional coupler with main and auxiliary rectangular coaxial lines different in size |
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| Publication Number | Publication Date |
|---|---|
| CN202678494U true CN202678494U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220394004 Withdrawn - After Issue CN202678494U (en) | 2012-08-10 | 2012-08-10 | Directional coupler with main and auxiliary rectangular coaxial lines different in size |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780056A (en) * | 2012-08-10 | 2012-11-14 | 成都赛纳赛德科技有限公司 | Directional coupler with main and auxiliary rectangular coaxial lines in different sizes |
-
2012
- 2012-08-10 CN CN 201220394004 patent/CN202678494U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780056A (en) * | 2012-08-10 | 2012-11-14 | 成都赛纳赛德科技有限公司 | Directional coupler with main and auxiliary rectangular coaxial lines in different sizes |
| CN102780056B (en) * | 2012-08-10 | 2014-04-16 | 成都赛纳赛德科技有限公司 | Directional coupler with main and auxiliary rectangular coaxial lines |
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|---|---|---|---|
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130116 Effective date of abandoning: 20140416 |
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| RGAV | Abandon patent right to avoid regrant |