CN202695691U - A multi-hole directional coupler for a rectangular coaxial line with coupling holes distributed in an interlacing manner - Google Patents
A multi-hole directional coupler for a rectangular coaxial line with coupling holes distributed in an interlacing manner Download PDFInfo
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- CN202695691U CN202695691U CN 201220394238 CN201220394238U CN202695691U CN 202695691 U CN202695691 U CN 202695691U CN 201220394238 CN201220394238 CN 201220394238 CN 201220394238 U CN201220394238 U CN 201220394238U CN 202695691 U CN202695691 U CN 202695691U
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- rectangular coaxial
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Abstract
The utility model discloses a multi-hole directional coupler for a rectangular coaxial line with coupling holes distributed in an interlacing manner, and the directional coupler comprises a main rectangular coaxial line, an auxiliary rectangular coaxial line, and coupling holes; the main rectangular coaxial line and the auxiliary coaxial line are mutually separated, and the main rectangular coaxial line is connected with the auxiliary coaxial line through at least three coupling holes; the coupling hole comprises a hollow coupling tube attached on a side wall of the main rectangular coaxial line or/and a side wall of the auxiliary coaxial line, the coupling hole also comprises a coupling cavity with three opening terminals, the coupling cavity is close to the side wall of the main rectangular coaxial line and is conducted with the hollow coupling tube, and the coupling cavity is positioned between the main and auxiliary rectangular coaxial lines and is conducted with the main and auxiliary rectangular coaxial lines; and adjacent coupling holes are distributed in an axial direction of the main rectangular coaxial line and are distributed in sequence on a left side and a right side of the main rectangular coaxial line in an interlacing manner. The multi-hole directional coupler for the rectangular coaxial line with the coupling holes distributed in an interlacing manner has advantages of compact structure, simple processing, super-wide work bandwidth, and low insertion loss, and especially in millimeter wave and terahertz wave band, a protruding advantage in an aspect of low insertion loss is provided when compared with normal multi-hole directional couplers.
Description
Technical field
The utility model relates to multi-hole directional coupler, specifically, relates to the porous rectangular coaxial line directional coupler that a kind of coupling aperture that utilizes a plurality of holes to be coupled is interspersed.
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 accomplish that very wide bandwidth, directivity also have very and improve, 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; This just encourages us to remove to design a kind of novel porous 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, the porous rectangular coaxial line directional coupler that provides a kind of compact, coupling aperture that insertion loss is low to be interspersed.
To achieve these goals, the technical solution adopted in the utility model is as follows: the porous rectangular coaxial line directional coupler that coupling aperture is interspersed 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; The structure of main rectangular coaxial line and secondary rectangular coaxial line is consistent, and wherein main rectangular coaxial line and secondary rectangular coaxial line all consist of the built-in conductor of rectangular waveguide; Main rectangular coaxial line and secondary rectangular coaxial line are isolated mutually; Main rectangular coaxial line is communicated with secondary rectangular coaxial line by least 3 coupling apertures, 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 main 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; Described coupling aperture is arranged along the axis direction of main rectangular coaxial line, and along main rectangular coaxial line axis direction, adjacent coupling aperture is interspersed successively in left side and the right side of main rectangular coaxial bobbin thread; Along on main rectangular coaxial line axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength in the central task frequency of main rectangular coaxial line 20% ~ 30% between.
The projection of shape that coupling aperture is overlooked on direction at it is circle; The projection of shape that the hollow tube coupling is overlooked on direction at it is circle; The projection of shape that coupling cavity is overlooked on direction at it is circle.
The projection of shape that coupling aperture is overlooked on direction at it is triangle; The projection of shape that the hollow tube coupling is overlooked on direction at it is triangle; The projection of shape that coupling cavity is overlooked on direction at it is triangle.
The projection of shape that coupling aperture is overlooked on direction at it is rectangle; The projection of shape that the hollow tube coupling is overlooked on direction at it is rectangle; The projection of shape that coupling cavity is overlooked on direction at it is rectangle.
The projection of shape that coupling aperture is overlooked on direction at it is circle; The projection of shape that the hollow tube coupling is overlooked on direction at it is semicircle; The projection of shape that coupling cavity is overlooked on direction at it is semicircle.
Added a cylindrical metal body that axis is parallel with the axis of coupling aperture and vertical with main rectangular coaxial bobbin thread in described coupling aperture, this cylindrical metal body one end connects with the inwall of corresponding coupling aperture, the cross section of this cylindrical metal body be shaped as polygon, and the cylindrical metal body extends into the inside of main rectangular coaxial line.
The axis of described main rectangular coaxial line and secondary rectangular coaxial line is parallel to each other.
The one or both ends of described main rectangular coaxial line or secondary rectangular coaxial line also are 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.
Single-hole directional coupler has relatively narrow bandwidth on directivity, so people have expected a series of coupling apertures of design, this series of coupling aperture forms an array, and several arrays can also stack up, and come thus the comprehensive degree of coupling and directional responses.Utilize the directivity of aperture and the directivity of array to superpose in coupled end, just can obtain better directivity, and this extra degree of freedom can also improve bandwidth.Therefore, in order to increase the coupling performance of coupling aperture, we arrange coupling aperture along the axis of main rectangular coaxial line, simultaneously in order to increase the bore of coupling aperture, and the left side that is distributed in main rectangular coaxial bobbin thread and right side that we interlock adjacent coupling aperture successively.
After coupling aperture is staggered, under the condition that meets the coupling reinforcement, be adjacent two coupling apertures hole in the heart apart from should be arranged on main rectangular coaxial line the central task frequency guide wavelength 20% ~ 30% between, can increase the bore of coupling aperture, so can further add close coupling again, thereby further improve the directivity of this rectangular waveguide directional coupler.
Simultaneously, preferentially selecting cross section is that rectangle column metallic object is arranged in coupling aperture, and the position of cylindrical metal body in coupling aperture is unrestricted, can be arranged according to the actual requirements.
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 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 body, 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.
Based on said structure, the utility model compared to its improvement of multi-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.
Owing to there being a plurality of coupling apertures, its a plurality of coupling apertures can reach the effect that coupling is strengthened between waveguide, for the aperture that makes coupling aperture, strengthen simultaneously, therefore the further improvement of the utility model is: coupling aperture is arranged along the axis of main rectangular coaxial line, and along main rectangular coaxial line axis direction, adjacent coupling aperture is interspersed successively in left side and the right side of main rectangular coaxial bobbin thread; Along on main rectangular coaxial line axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength in the central task frequency of main rectangular coaxial line 20% ~ 30% between.That is the left side that is distributed in main rectangular coaxial bobbin thread and the right side that, adjacent coupling aperture are interlocked successively.After adjacent coupling aperture is interspersed, in unit are, because we adopt the both sides of the staggered main rectangular coaxial line that coupling aperture is arranged, so certainly will be under the condition of identical hole count, we just can increase the bore of coupling aperture, the reinforcement that so can further be coupled again, thus the directivity of this porous rectangular waveguide directional coupler further improved.
The operation principle of multi-hole directional coupler can be described below:
Because can being similar to, the waveguide inwall regards the 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 rectangular coaxial line of main waveguide internal electric field, reach that a part of electric field that complementary wave leads still perpendicular to the public broadside of major-minor waveguide by aperture, and its power line forms an elbow.The closed curve that magnetic field (magnetic line of force) is parallel main Guide of Wide Wall, pierce into therefore the magnetic field of main waveguide (magnetic line of force) forms one group at the aperture place full curve that passes secondary rectangular coaxial line.
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.The electromagnetic wave that two kinds of couplings are formed merges, and we can find out that the electromagnetic wave transmitted toward the coupled end direction superposes in the same way, form coupling output; Electromagnetic wave toward the transmission of isolation end direction oppositely superposes, and the formation of cancelling out each other isolation end, so be to export without coupling in principle.But, due to aperture electricity, magnetic-coupled asymmetry, both superpose and have produced directivity.
Multi-hole directional coupler utilizes a series of coupling apertures to form an array exactly, and several arrays can also stack up, and come thus the comprehensive degree of coupling and directional responses.Utilize the directivity of aperture and the directivity of array to superpose in coupled end, just can obtain better directivity, and this extra degree of freedom can also improve bandwidth.
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 multi-hole directional coupler, compares, and aspect filter with low insertion loss, has outstanding advantage.Compact multi-hole 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 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-.
The A-A profile that Fig. 4 is the utility model embodiment mono-.
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 that Fig. 7 is the utility model embodiment tetra-.
The vertical view that Fig. 8 is the utility model embodiment five.
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; 4, cylindrical metal body; 5, curved waveguide.
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 porous rectangular coaxial line directional coupler that coupling aperture is interspersed, 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; 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 sidewall, hollow tube coupling 32 is connected with the coupling cavity 31 of three end openings near the sidewall of rectangular waveguide 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
.wherein, the number of coupling aperture 3 is 3; 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.Coupling aperture 3 is arranged along the axis of main rectangular coaxial line 1, along the adjacent coupling aperture of main rectangular coaxial line 1 axis direction, is interspersed successively in left side and the right side of main rectangular coaxial line 1 axis; Along on main rectangular coaxial line 1 axis direction, the hole of adjacent two coupling apertures 3 in the heart apart from the guide wavelength in the central task frequency of main rectangular coaxial line 1 22% ~ 28% between.
Compared to its improvement of multi-hole directional coupler in the past, be: 1, traditional coupling aperture is improved to the coupling channel formed by 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; 2, the left side that is distributed in main rectangular coaxial bobbin thread and the right side that adjacent coupling aperture are interlocked successively.After adjacent coupling aperture is interspersed, we just can increase the bore of coupling aperture.Can increase its directivity like this.
Coupling aperture is arranged along the axis of main rectangular coaxial line, and along main rectangular coaxial line axis direction, adjacent coupling aperture is interspersed successively in left side and the right side of main rectangular coaxial bobbin thread; Along on main rectangular coaxial line axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength in the central task frequency of main rectangular coaxial line 20% ~ 30% between.That is the left side that is distributed in main rectangular coaxial bobbin thread and the right side that, adjacent coupling aperture are interlocked successively.After adjacent coupling aperture is interspersed, in unit are, because we adopt the both sides of the staggered main rectangular coaxial line that coupling aperture is arranged, so certainly will be under the condition of identical hole count, we just can increase the bore of coupling aperture, the reinforcement that so can further be coupled again, thus the directivity of this square porous guide directional coupler further improved.
Embodiment mono-
As Fig. 3, shown in 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, and main rectangular coaxial line 1 and secondary rectangular coaxial line 2 are communicated with by 5 coupling apertures 3; The part of 5 coupling apertures 3 is beyond main rectangular coaxial line 1 and secondary rectangular coaxial line 2.The axis of described coupling aperture 3 is vertical with the axis of main rectangular coaxial line 1, its cross section be shaped as irregular polygon; Coupling aperture 3 is positioned at the both sides of main rectangular coaxial line, and along on main rectangular coaxial line 1 axis direction, the hole of adjacent two coupling apertures is in the heart apart between the guide wavelength 22% ~ 28% of the central task frequency at main rectangular coaxial line 1.Added the cylindrical metal body 4 that another axis is vertical with the axis of main rectangular coaxial line 1 in each coupling aperture 3, the cross section of this cylindrical metal body 4 be shaped as rectangle.
Embodiment bis-
As shown in Figure 5, the place different from embodiment mono-is that main rectangular coaxial line 1 and secondary rectangular coaxial line 2 are communicated with by 4 coupling apertures 3, the two ends of secondary rectangular coaxial line 2 also are connected with curved waveguide 5, at the other end of curved waveguide 5, also are connected with the matching structure with external world's coupling.Can facilitate like this being connected of directional coupler and extraneous device, thereby it is better to obtain directivity, the guide directional coupler that bandwidth is wider.
Embodiment tri-
As shown in Figure 6, the place different from embodiment one is that 5 coupling apertures 3 are interspersed in the both sides of main rectangular coaxial line 1, and the cross section of coupling aperture 3 is oval, and does not all add column metallic object 4 in coupling aperture 3.
Embodiment tetra-
As shown in Figure 7, the place different from embodiment three is that the cross section of coupling aperture 3 is rectangle, and is provided with the cylindrical metal body 4 that shape of cross section is rectangle in coupling aperture 3.
Embodiment five
As shown in Figure 8, different from embodiment three is that the cross section of coupling aperture 3 is triangle.
Just can realize preferably the utility model as mentioned above.
Claims (9)
1. the porous rectangular coaxial line directional coupler that coupling aperture is interspersed 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) is consistent with the structure of secondary rectangular coaxial line (2), and wherein main rectangular coaxial line (1) and secondary rectangular coaxial line (2) all consist of the built-in conductor of rectangular waveguide, 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 least 3 coupling apertures (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) 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), 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, described coupling aperture (3) is arranged along the axis direction of main rectangular coaxial line (1), and along main rectangular coaxial line (1) axis direction, adjacent coupling aperture (3) is interspersed successively in left side and the right side of main rectangular coaxial line (1) axis, along on main rectangular coaxial line (1) axis direction, the hole of adjacent two coupling apertures (3) in the heart apart from the guide wavelength in the central task frequency of main rectangular coaxial line (1) 20% ~ 30% between.
2. the porous rectangular coaxial line directional coupler that coupling aperture according to claim 1 is interspersed is characterized in that: the projection of shape that coupling aperture (3) is overlooked on direction at it is circle; The projection of shape that hollow tube coupling (32) is overlooked on direction at it is circle; The projection of shape that coupling cavity (31) is overlooked on direction at it is circle.
3. the porous rectangular coaxial line directional coupler that coupling aperture according to claim 1 is interspersed is characterized in that: the projection of shape that coupling aperture (3) is overlooked on direction at it is triangle; The projection of shape that hollow tube coupling (32) is overlooked on direction at it is triangle; The projection of shape that coupling cavity (31) is overlooked on direction at it is triangle.
4. the porous rectangular coaxial line directional coupler that coupling aperture according to claim 1 is interspersed is characterized in that: the projection of shape that coupling aperture (3) is overlooked on direction at it is rectangle; The projection of shape that hollow tube coupling (32) is overlooked on direction at it is rectangle; The projection of shape that coupling cavity (31) is overlooked on direction at it is rectangle.
5. the porous rectangular coaxial line directional coupler that coupling aperture according to claim 1 is interspersed is characterized in that: the projection of shape that coupling aperture (3) is overlooked on direction at it is circle; The projection of shape that hollow tube coupling (32) is overlooked on direction at it is semicircle; The projection of shape that coupling cavity (31) is overlooked on direction at it is semicircle.
6. the porous rectangular coaxial line directional coupler that coupling aperture according to claim 1 is interspersed, it is characterized in that: added a cylindrical metal body (4) that axis is parallel with the axis of coupling aperture (3) and vertical with main rectangular coaxial line (1) axis in described coupling aperture (3), these cylindrical metal body (4) one ends connect with the inwall of corresponding coupling aperture (3), the cross section of this cylindrical metal body (4) be shaped as polygon, and cylindrical metal body (4) extends into the inside of main rectangular coaxial line (1).
7. the porous rectangular coaxial line directional coupler that coupling aperture according to claim 1 is interspersed is characterized in that: the axis of described main rectangular coaxial line (1) and secondary rectangular coaxial line (2) is parallel to each other.
8. the porous rectangular coaxial line directional coupler be interspersed according to the described coupling aperture of any one in claim 1-7 is characterized in that: the one or both ends of described main rectangular coaxial line (1) or secondary rectangular coaxial line (2) also are connected with curved waveguide (5).
9. the porous rectangular coaxial line directional coupler be interspersed according to the described coupling aperture of any one in claim 1-7 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 201220394238 CN202695691U (en) | 2012-08-10 | 2012-08-10 | A multi-hole directional coupler for a rectangular coaxial line with coupling holes distributed in an interlacing manner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220394238 CN202695691U (en) | 2012-08-10 | 2012-08-10 | A multi-hole directional coupler for a rectangular coaxial line with coupling holes distributed in an interlacing manner |
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| CN202695691U true CN202695691U (en) | 2013-01-23 |
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| CN 201220394238 Withdrawn - After Issue CN202695691U (en) | 2012-08-10 | 2012-08-10 | A multi-hole directional coupler for a rectangular coaxial line with coupling holes distributed in an interlacing manner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810712A (en) * | 2012-08-10 | 2012-12-05 | 成都赛纳赛德科技有限公司 | Rectangular porous coaxial directional coupler with cross distributed coupling holes |
-
2012
- 2012-08-10 CN CN 201220394238 patent/CN202695691U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810712A (en) * | 2012-08-10 | 2012-12-05 | 成都赛纳赛德科技有限公司 | Rectangular porous coaxial directional coupler with cross distributed coupling holes |
| CN102810712B (en) * | 2012-08-10 | 2014-04-16 | 成都赛纳赛德科技有限公司 | Rectangular porous coaxial directional coupler with cross distributed coupling holes |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130123 Effective date of abandoning: 20140416 |
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| RGAV | Abandon patent right to avoid regrant |