CN102810708B - Porous ridge waveguide directional coupler located at one side of main ridge waveguide - Google Patents
Porous ridge waveguide directional coupler located at one side of main ridge waveguide Download PDFInfo
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- CN102810708B CN102810708B CN201210282610.6A CN201210282610A CN102810708B CN 102810708 B CN102810708 B CN 102810708B CN 201210282610 A CN201210282610 A CN 201210282610A CN 102810708 B CN102810708 B CN 102810708B
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Abstract
The invention discloses a porous ridge waveguide directional coupler located at one side of main ridge waveguide, comprising a main ridge waveguide, an auxiliary ridge waveguide and coupling holes. The main ridge waveguide is isolated from the auxiliary ridge waveguide. The main ridge waveguide communicates with the auxiliary ridge waveguide through at least three coupling holes. At least one coupling hole comprises a hollow coupling tube which is adhered on the lateral wall of the main ridge waveguide or/and the lateral wall of the auxiliary ridge waveguide. The lateral wall of the hollow coupling tube close to the main ridge waveguide is connected with a coupling chamber of which three ends are opened; the coupling chamber communicates with the hollow coupling tube; and the coupling chamber is located between the main ridge waveguide and the auxiliary ridge waveguide and communicates with the main ridge waveguide and the auxiliary ridge waveguide. The coupling holes are arranged along the axis of the main ridge waveguide; and the coupling holes which are adjacent along the axis of the main ridge waveguide are located at one side of the axis of the main ridge waveguide. The porous ridge waveguide directional coupler located at one side of the main ridge waveguide has the advantages of compact structure, wide working bandwidth, simple process, large power capacity and low insertion loss.
Description
Technical field
The present invention relates to multi-hole directional coupler, specifically, relate to a kind of porous ridge waveguide directional coupler that is positioned at backbone waveguide one side that utilizes multiple holes 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 is made up 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 be mainly 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 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.
Along with the development of aerospace technology, require microwave circuit and system to accomplish miniaturization, lightweight and dependable performance, so there is strip line and microstrip line, because the microwave integrated transmission-lines such as fin line, the line of rabbet joint, co-planar waveguide and coplanar stripline have appearred again in the needs of microwave circuit and system in succession, various transmission line directional couplers are so just there are subsequently.
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 accomplish that very wide bandwidth, directivity also have very and improve, but also exist 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 porous 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, provide that a kind of compact, insertion loss are low, the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side in broadband.
To achieve these goals, the technical solution used in the present invention is as follows: be positioned at the porous ridge waveguide directional coupler of backbone waveguide one side, comprise backbone waveguide that axis is parallel to each other and secondary ridge waveguide and the coupling aperture as coupling channel; The structure of backbone waveguide and secondary ridge waveguide is consistent, wherein backbone waveguide and secondary ridge waveguide be all by upper wall or and the lower wall rectangular waveguide that loads conductor ridge form; Backbone waveguide and secondary ridge waveguide are isolated mutually; Backbone waveguide is communicated with secondary ridge waveguide by least 3 coupling apertures, at least 1 coupling aperture comprise be attached to backbone waveguide sidewalls or and the hollow tube coupling of secondary ridge waveguide sidewall, hollow tube coupling is connected with the coupling cavity of three end openings near the sidewall of backbone waveguide, coupling cavity and the conducting of hollow tube coupling, coupling cavity between backbone waveguide and secondary ridge waveguide and with backbone waveguide and secondary ridge waveguide conducting
;described coupling aperture is arranged along the axis of backbone waveguide, is positioned at a side of backbone waveguide axis along the adjacent coupling aperture of backbone waveguide axis direction; Along on backbone waveguide axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength in the central task frequency of backbone waveguide 20% ~ 30% between.
The rectangular waveguide sidewall of hollow tube coupling and backbone waveguide or and the rectangular waveguide sidewall of secondary ridge waveguide be connected; Coupling cavity is between the rectangular waveguide of secondary ridge waveguide and the rectangular waveguide sidewall of backbone waveguide.
The transverse cross-sectional shape of hollow tube coupling is circle or polygon.
In described coupling aperture, add another axis cylindrical metal body parallel and vertical with the axis of backbone waveguide with the axis of coupling aperture, the only inwall connection with corresponding coupling aperture in a direction of this cylindrical metal body, the cross section of this cylindrical metal body be shaped as polygon.
The all or part of inside that is positioned at rectangular waveguide of described cylindrical metal body.
The axis of described backbone waveguide and secondary ridge waveguide is parallel to each other.
Described rectangular waveguide one or both ends are also connected with curved waveguide.
Described rectangular waveguide is connected with the matching structure with extraneous device matching in its one or both ends.
Single-hole directional coupler has relatively narrow bandwidth in directivity, so people have expected a series of coupling apertures of design, and an array of this series of coupling aperture composition, 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 backbone waveguide, simultaneously in order to increase the bore of coupling aperture, and the left side or the right side that are distributed in backbone waveguide axis that we interlock adjacent coupling aperture successively.
After coupling aperture is arranged along backbone waveguide one side, meeting under the condition of coupling reinforcement, be adjacent two coupling apertures hole in the heart apart from should be arranged on backbone waveguide central task frequency guide wavelength 20% ~ 30% between, can increase the bore of coupling aperture, so can further add again close coupling, thereby further improve the directivity of this porous rectangular waveguide directional coupler.
Meanwhile, 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 arrange according to the actual requirements.
Angle between the general axis of backbone waveguide and the axis of secondary ridge waveguide is between 0 ° to 180 °.For the volume that makes its whole coupler reduces, we pay the utmost attention to the axis of backbone waveguide and the axis of secondary ridge waveguide be arranged in parallel.
The projection of shape that coupling aperture is overlooked direction at it is unrestricted, and in the time 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 cylindrical metal body, described coupling aperture and cylindrical metal body body are Y-shaped or cross and other starlike more than 4 branches in the projection of shape of overlooking direction.
Because the position of the coupling aperture of traditional multi-hole directional coupler is arranged between backbone waveguide and secondary ridge waveguide.And 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 made up of coupling cavity and hollow tube coupling, wherein when setting position, coupling cavity is arranged between backbone waveguide and secondary ridge waveguide, in order to be communicated with backbone waveguide and secondary ridge waveguide, owing to being also provided with hollow tube coupling, can further strengthen coupling; 2, because experiment is found, in the time that we select multiple coupling aperture, the directivity that adjacent coupled hole is arranged along the axis of backbone waveguide is better, while being positioned at the same side, meeting under the adjusting that directivity requires, than both sides or arrange in a jumble simultaneously, can also further dwindle the volume of whole directional coupler,, while therefore design, preferentially arrange hollow tube coupling in coupling aperture be attached to backbone waveguide sidewalls or and secondary ridge waveguide sidewall.Further preferentially be set to: adjacent coupling aperture is positioned at a side of backbone waveguide.
When be coupled output according to the above-mentioned coupler of being preferentially arranged to, its course of work is: microwave is first by backbone waveguide, in the time of the place of structure Coupling hole, by coupling cavity, microwave coupling is arrived to secondary ridge waveguide, under the effect of hollow tube coupling, add close coupling, make its directivity grow, be further positioned at a side of backbone waveguide due to adjacent coupling aperture; Therefore reinforcement can also further be coupled on the above-mentioned basis that adds close coupling.
Because the present invention adopts the design of multiple coupling apertures, between coupling aperture and coupling aperture, there is the effect that coupling is strengthened, if the permutation and combination between coupling aperture and coupling aperture can not reach applicable arranging, can cause many unfavorable factors, such as coupling weakens phenomenon, we arrange and have done corresponding research it for this reason, in order to reduce the volume of whole coupling and to reach the effect that coupling is strengthened, the further improvement of the present invention is: coupling aperture is arranged along the axis of backbone waveguide, is positioned at a side of backbone waveguide axis along the adjacent coupling aperture of backbone waveguide axis direction; Along on backbone waveguide axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength in the central task frequency of backbone waveguide 20% ~ 30% between.Be distributed in successively a side of backbone waveguide axis by adjacent coupling aperture, after adjacent coupling aperture distributes along backbone waveguide one side, reinforcement can further be coupled, thereby further improve this and be positioned at the directivity of the porous rectangular waveguide directional coupler of backbone waveguide one side, the hole of the adjacent two coupling apertures in the heart influencing factor of distance is determined by input signal, in addition, because the coupling aperture in the present invention is all positioned at the same side of backbone waveguide, therefore be compared to other arrangement mode, its small volume, as coupling aperture is arranged in both sides, compare with both sides, the design volume of an obvious side is less than the design volume of both sides.
The operation principle of multi-hole directional coupler can be described below:
Because can being similar to, waveguide inwall regards 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 ridge waveguide of main waveguide internal electric field, reaches 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, pierces into therefore the magnetic field of main waveguide (magnetic line of force) forms one group at aperture place the full curve that passes secondary ridge waveguide.
Entering by aperture 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 excite, and form the electromagnetic wave to coupled end and isolation end output respectively.
Entering by aperture 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 excite, and form the electromagnetic wave to coupled end and isolation end output respectively.
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 transmitting toward 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 an array of a series of coupling aperture composition 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 invention has the advantages that compact conformation, processing is simple, power capacity is large, bandwidth of operation is wide, insertion loss is low, particularly at millimeter wave and terahertz wave band, compared with common multi-hole directional coupler, aspect filter with low insertion loss, has outstanding advantage.Compact of the present invention is positioned at backbone waveguide one side porous rectangular waveguide directional coupler and is expected to be widely used in the electronic system of each microwave band and terahertz wave band.
Brief description of the drawings
Fig. 1 is stereogram when adjacent coupled hole is positioned at backbone waveguide one side 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 the A-A profile of 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.
Fig. 7 is the vertical view of the embodiment of the present invention four.
Fig. 8 is the vertical view of the embodiment of the present invention five.
Fig. 9 is the vertical view of the embodiment of the present invention six.
Label in figure is expressed as: 1, backbone waveguide; 2, secondary ridge waveguide; 3, coupling aperture; 31, coupling cavity; 32, hollow tube coupling; 4, cylindrical metal body; 5, curved waveguide, 6, conductor ridge.
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, be positioned at the porous ridge waveguide directional coupler of backbone waveguide one side, comprise as the backbone waveguide 1 of microwave main channel with as the secondary ridge waveguide 2 of sampled signal passage and as the coupling aperture 3 of coupling channel; Backbone waveguide 1 is consistent with the structure of secondary ridge waveguide 2, wherein backbone waveguide 1 and secondary ridge waveguide 2 be all by upper wall or and the lower wall rectangular waveguide that loads conductor ridge 6 form; Backbone waveguide 1 and secondary ridge waveguide 2 are isolated mutually; At least 1 coupling aperture 3 comprise be attached to backbone waveguide 1 sidewall or and the hollow tube coupling 32 of secondary ridge waveguide 2 sidewalls, hollow tube coupling 32 is connected with the coupling cavity 31 of three end openings near the sidewall of backbone waveguide 1, coupling cavity 31 and 32 conductings of hollow tube coupling, coupling cavity 31 between backbone waveguide 1 and secondary ridge waveguide 2 and with backbone waveguide 1 and 2 conductings of secondary ridge waveguide
.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 backbone waveguide 1 and secondary ridge waveguide 2 is parallel to each other.Coupling aperture 3 is arranged along the axis direction of backbone waveguide 1, is positioned at a side of backbone waveguide 1 axis along the adjacent coupling aperture of backbone waveguide 1 axis direction; Along on backbone waveguide 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 backbone waveguide 1 23% ~ 27% between.
Because the present invention adopts the design of multiple coupling apertures, between coupling aperture and coupling aperture, there is the effect that coupling is strengthened, if the permutation and combination between coupling aperture and coupling aperture can not reach applicable arranging, can cause many unfavorable factors, such as coupling weakens phenomenon, we arrange and have done corresponding research it for this reason, in order to reduce the volume of whole coupling and to reach the effect that coupling is strengthened, the further improvement of the present invention is: coupling aperture is arranged along the axis of backbone waveguide, is positioned at a side of backbone waveguide axis along the adjacent coupling aperture of backbone waveguide axis direction; Along on backbone waveguide axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength in the central task frequency of backbone waveguide 23% ~ 27% between., adjacent coupling aperture is distributed in successively to a side of backbone waveguide axis.After adjacent coupling aperture distributes along backbone waveguide one side, reinforcement can further be coupled, thereby further improve this and be positioned at the directivity of the porous rectangular waveguide directional coupler of backbone waveguide one side, the hole of the adjacent two coupling apertures in the heart influencing factor of distance determines by inputting microwave, in addition, because the coupling aperture in the present invention is all positioned at the same side of backbone waveguide, therefore be compared to other arrangement mode, its small volume, as coupling aperture is arranged in both sides, compare with both sides, the design volume of an obvious side is less than the design volume of both sides.
Embodiment mono-
As Fig. 3, shown in 4, the present embodiment comprises and is provided with backbone waveguide 1 and secondary ridge waveguide 2, and backbone waveguide 1 is microwave main channel, and secondary ridge waveguide 2 is sampled signal passage; Backbone waveguide 1 and secondary ridge waveguide 2 are isolated mutually, are communicated with by 5 coupling apertures 3; The part of 5 coupling apertures 3 is beyond backbone waveguide 1 and secondary ridge waveguide 2.The axis of described coupling aperture 3 is vertical with the axis of backbone waveguide 1, its cross section be shaped as irregular polygon; Adjacent coupled hole 3 is positioned at a side of backbone waveguide, along on backbone waveguide 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 backbone waveguide 1 23% ~ 27% between, in each coupling aperture 3, added another axis cylindrical metal body 4 parallel and vertical with the axis of backbone waveguide 1 with the axis of 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 to have 4 coupling apertures 3 to be positioned at the same side of backbone waveguide, the hole in adjacent coupled hole 3 in the heart apart from the guide wavelength in the central task frequency of backbone waveguide 1 23% ~ 27% between, its coupling performance is better.4 of each cylindrical metal bodies connect and are positioned in the different azimuth of coupling aperture 3 with the inwall of corresponding coupling aperture 3 in a direction, and its particular location is determined by parameter optimizations such as directivity.
Embodiment tri-
As shown in Figure 6, the places different from embodiment mono-are that the two ends of secondary ridge waveguide 2 are also connected with curved waveguide 5, are also connected with at the other end of curved waveguide 5 matching structure mating with the external world.Can facilitate being like this connected of this directional coupler and extraneous device, thereby it is better to obtain directivity, the porous rectangular waveguide directional coupler that bandwidth is wider.
Embodiment tetra-
As shown in Figure 7, the place different from embodiment one is that the cross section of coupling aperture 3 is ellipse, and in coupling aperture 3, is provided with the cylindrical metal body 4 that shape of cross section is rectangle.
Embodiment five
As shown in Figure 8, the place different from embodiment four is that the cross section of coupling aperture 3 is rectangle, and all do not add column metallic object 4 in coupling aperture 3.
Embodiment six
As shown in Figure 9, different from embodiment five is that the cross section of coupling aperture 3 is triangle.
Just can realize preferably as mentioned above the present invention.
Claims (8)
1. the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side, is characterized in that: comprise backbone waveguide (1) that axis is parallel to each other and secondary ridge waveguide (2) and the coupling aperture (3) as coupling channel, backbone waveguide (1) is consistent with the structure of secondary ridge waveguide (2), wherein backbone waveguide (1) and secondary ridge waveguide (2) be all by upper wall or and lower wall load conductor ridge (6) rectangular waveguide form, backbone waveguide (1) and secondary ridge waveguide (2) are isolated mutually, backbone waveguide (1) is communicated with secondary ridge waveguide (2) by least 3 coupling apertures (3), at least 1 coupling aperture (3) comprise be attached to backbone waveguide (1) sidewall or and the hollow tube coupling (32) of secondary ridge waveguide sidewall, hollow tube coupling (32) is connected with the coupling cavity (31) of three end openings near the sidewall of backbone waveguide (1), the coupling cavity (31) of three end openings comprises upper port and lower port and wall port, coupling cavity (31) and hollow tube coupling (32) conducting, coupling cavity (31) be positioned between backbone waveguide (1) and secondary ridge waveguide (2) and with backbone waveguide (1) and secondary ridge waveguide (2) conducting, the upper port of coupling cavity (31) and backbone waveguide (1) conducting, the lower port of coupling cavity (31) and secondary ridge waveguide (2) conducting, the wall port of coupling cavity (31) and hollow tube coupling (32) conducting, described coupling aperture (3) is arranged along the axis of backbone waveguide (1), is positioned at a side of backbone waveguide (1) axis along the adjacent coupling aperture (3) of backbone waveguide (1) axis direction, along on backbone waveguide (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 backbone waveguide (1) 20%～30% between.
2. the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side according to claim 1, is characterized in that: the rectangular waveguide sidewall of hollow tube coupling (32) and backbone waveguide (1) or and the rectangular waveguide sidewall of secondary ridge waveguide (2) be connected; Coupling cavity (31) is positioned between the rectangular waveguide of secondary ridge waveguide (2) and the rectangular waveguide sidewall of backbone waveguide (1).
3. the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side according to claim 1, is characterized in that: the transverse cross-sectional shape of hollow tube coupling (32) is circle or polygon.
4. the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side according to claim 1, it is characterized in that: in described coupling aperture (3), added another axis cylindrical metal body (4) parallel and vertical with the axis of backbone waveguide (1) with the axis of coupling aperture (3), the only inwall connection with corresponding coupling aperture (3) in a direction of this cylindrical metal body (4), the cross section of this cylindrical metal body (4) be shaped as polygon.
5. the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side according to claim 4, is characterized in that: all or part of inside that is positioned at rectangular waveguide of described cylindrical metal body (4).
6. the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side according to claim 1, is characterized in that: the axis of described backbone waveguide (1) and secondary ridge waveguide (2) is parallel to each other.
7. according to the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side described in any one in claim 1-5, it is characterized in that: described rectangular waveguide one or both ends are also connected with curved waveguide (5).
8. according to the porous ridge waveguide directional coupler that is positioned at backbone waveguide one side described in any one in claim 1-5, it is characterized in that: described rectangular waveguide is 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 |
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| CN201210282610.6A CN102810708B (en) | 2012-08-10 | 2012-08-10 | Porous ridge waveguide directional coupler located at one side of main ridge waveguide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282610.6A CN102810708B (en) | 2012-08-10 | 2012-08-10 | Porous ridge waveguide directional coupler located at one side of main ridge waveguide |
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| CN102810708A CN102810708A (en) | 2012-12-05 |
| CN102810708B true CN102810708B (en) | 2014-08-06 |
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| CN201210282610.6A Expired - Fee Related CN102810708B (en) | 2012-08-10 | 2012-08-10 | Porous ridge waveguide directional coupler located at one side of main ridge waveguide |
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Citations (3)
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|---|---|---|---|---|
| JPS56115002A (en) * | 1980-02-18 | 1981-09-10 | Nec Corp | Waveguide-type directional coupler |
| CN1221886A (en) * | 1997-12-26 | 1999-07-07 | 株式会社村田制作所 | Non radiative dielectric waveguide having portion for line converstion between different types of non radiative dielectric waveguides |
| WO2006027828A1 (en) * | 2004-09-07 | 2006-03-16 | Mitsubishi Denki Kabushiki Kaisha | Electric power distributing apparatus, electric power combining apparatus, mono-pulse signal combining circuit, array antenna power supplying circuit, and beam shaping circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2748920B2 (en) * | 1996-05-27 | 1998-05-13 | 日本電気株式会社 | Waveguide coupler |
| CN101728618A (en) * | 2008-10-28 | 2010-06-09 | 西安恒达微波技术开发公司 | Double ridge waveguide directional coupler |
| JP5558225B2 (en) * | 2009-06-25 | 2014-07-23 | 京セラ株式会社 | Directional coupler |
| CN202737080U (en) * | 2012-08-10 | 2013-02-13 | 成都赛纳赛德科技有限公司 | Porous ridge waveguide directional coupler located at one side of main ridge waveguide |
-
2012
- 2012-08-10 CN CN201210282610.6A patent/CN102810708B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56115002A (en) * | 1980-02-18 | 1981-09-10 | Nec Corp | Waveguide-type directional coupler |
| CN1221886A (en) * | 1997-12-26 | 1999-07-07 | 株式会社村田制作所 | Non radiative dielectric waveguide having portion for line converstion between different types of non radiative dielectric waveguides |
| WO2006027828A1 (en) * | 2004-09-07 | 2006-03-16 | Mitsubishi Denki Kabushiki Kaisha | Electric power distributing apparatus, electric power combining apparatus, mono-pulse signal combining circuit, array antenna power supplying circuit, and beam shaping circuit |
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