CN202678495U - Ridge waveguide directional coupler - Google Patents
Ridge waveguide directional coupler Download PDFInfo
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- CN202678495U CN202678495U CN 201220394033 CN201220394033U CN202678495U CN 202678495 U CN202678495 U CN 202678495U CN 201220394033 CN201220394033 CN 201220394033 CN 201220394033 U CN201220394033 U CN 201220394033U CN 202678495 U CN202678495 U CN 202678495U
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- waveguide
- ridge waveguide
- coupling
- backbone
- directional coupler
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Abstract
The utility model discloses a ridge waveguide directional coupler which comprises a main ridge waveguide serving as a microwave main channel, an auxiliary ridge waveguide serving as a sampling signal channel, and coupling holes serving as a coupling channel; the main ridge waveguide and the auxiliary ridge waveguide are isolated from each other; the main ridge waveguide is communicated with the auxiliary ridge waveguide through one or two coupling holes; at least one coupling hole comprises a hollow coupling pipe attached to the side wall of the main ridge waveguide or/and the side wall of the auxiliary ridge waveguide; 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 ridge waveguide; and the coupling cavity is positioned between the main ridge waveguide and the auxiliary ridge waveguide and communicated with main ridge waveguide and the auxiliary ridge waveguide. The ridge waveguide directional coupler has the advantages of compact structure, simplicity in processing, wide operation bandwidth, large power capacity and low insertion loss, particularly in millimeter waves and Terahertz wave band; and compared with a common multi-hole directional coupler, the ridge waveguide directional coupler has outstanding advantages in the aspect of low insertion loss.
Description
Technical field
The utility model relates to ridge waveguide directional coupler, specifically, relates to a kind of ridge waveguide directional coupler that utilizes single hole or diplopore to be coupled.
Background technology
Directional coupler is widely used a kind of microwave device in microwave system, and its Main Function is that microwave signal is carried out to power division according to a certain percentage; Directional coupler consists of two transmission lines, and coaxial line, rectangular waveguide, ridge 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, broadband ridge waveguide directional coupler that insertion loss is low are provided.
To achieve these goals, the technical solution adopted in the utility model is as follows: ridge waveguide directional coupler comprises the backbone waveguide of mutual isolation and secondary ridge waveguide and as the coupling aperture of coupling channel; The structure of backbone waveguide and secondary ridge waveguide is consistent, wherein the backbone waveguide comprise the rectangular waveguide cavity body and be arranged on rectangular waveguide cavity body upper wall or and the loading conductor ridge of rectangular waveguide lower wall; The backbone waveguide is communicated with secondary ridge waveguide by 1 or 2 coupling apertures, at least 1 coupling aperture comprises hollow tube coupling and the coupling cavity that is arranged on hollow tube coupling sidewall, described hollow tube coupling be attached to the backbone waveguide sidewalls or and secondary ridge waveguide sidewall, the hollow cavity that coupling cavity is three end openings, 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
.
The projection of shape that the hollow tube coupling is overlooked direction at it is for semicircle, and the projection of shape that coupling cavity is overlooked direction at it is for circular.
Be provided with metallic object in described coupling aperture, wherein the axis of metallic object is parallel with the axis of coupling aperture and vertical with the axis axis vertical or secondary ridge waveguide of backbone waveguide, and the cross section of cylindrical metal body is triangle.
Angle between the axis of described backbone waveguide and the axis of secondary ridge waveguide is between 0 ° to 170 °.
The number of described coupling aperture is 2 o'clock, the central point of two coupling apertures lay respectively at backbone waveguide and secondary ridge waveguide after overlooking direction projection, intersect the parallelogram formed two relative summits directly over.
The one or both ends of described backbone waveguide also are connected with the curved ridges waveguide.
Described backbone waveguide Huo and secondary ridge waveguide are connected with the matching structure with extraneous device matching in its one or both ends.
Based on said structure, the utility model compared to its improvement of single-hole directional coupler in the past is: traditional coupling aperture is improved to the coupling channel be comprised of coupling cavity and hollow tube coupling, wherein coupling cavity is arranged between backbone waveguide and secondary ridge waveguide, the hollow tube coupling be attached to the backbone waveguide sidewalls or and secondary ridge waveguide sidewall.Can increase its directivity like this.
Angle between the axis of general backbone waveguide and the axis of secondary ridge waveguide is between 0 ° to 170 °.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, that is, the angle between the axis of backbone waveguide and the axis of secondary ridge waveguide is 0 °.Simultaneously, the angular dimension between the axis of the axis of its backbone waveguide and secondary ridge waveguide 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 is significantly improved, 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 the backbone waveguide sidewalls or and secondary ridge waveguide sidewall could improve its directivity.
The projection of shape that coupling aperture is overlooked direction at it is unrestricted, and when considering cost of manufacture, we pay the utmost attention to circle or triangle or the quadrangle of the simple and easy batch production of energy.
While increasing the cylindrical metal body, 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.
The operation principle of single-hole 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, processing are simply, bandwidth of operation is wide, power capacity is large, insertion loss is low, particularly at millimeter wave and terahertz wave band, with common single-hole directional coupler, compares, and aspect filter with low insertion loss, has outstanding advantage.Compact ridge waveguide 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 backbone waveguide in the utility model is parallel with the axis of secondary ridge waveguide.
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, backbone waveguide; 2, secondary ridge waveguide; 3, coupling aperture; 31, coupling cavity; 32, hollow tube coupling; 7, cylindrical metal body; 4, curved ridges waveguide; 5, ridge 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, ridge waveguide directional coupler, 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 and secondary ridge waveguide 2 are isolated mutually; Backbone waveguide 1 is communicated with secondary ridge waveguide 2 by 1 or 2 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 2 sidewalls, hollow tube coupling 32 is connected with the coupling cavity 31 of three end openings near the sidewall of ridge 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
.the projection of shape that wherein 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.
Compared to its improvement of single-hole directional coupler in the past, be: traditional coupling aperture is improved to the coupling channel formed by coupling cavity 31 and hollow tube coupling 32, wherein coupling cavity 31 is arranged between backbone waveguide 1 and secondary ridge waveguide 2, hollow tube coupling 32 be attached to backbone waveguide 1 sidewall or and secondary ridge waveguide sidewall.Can increase its directivity like this.
Embodiment mono-
As shown in Figure 3,4, the present embodiment comprises and is provided with backbone waveguide 1 and secondary ridge waveguide 2, and backbone waveguide 1 is the microwave main channel, and secondary ridge waveguide 2 is the sampled signal passage; The axis of backbone waveguide 1 and secondary ridge waveguide 2 is parallel to each other, backbone waveguide 1 and secondary ridge waveguide 2 are isolated mutually, have 1 coupling aperture 3 to comprise to 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 ridge 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
.add parallel with the axis of coupling aperture 3 and vertical with the axis of the backbone waveguide 1 cylindrical metal body 7 of another axis in coupling aperture 3, the cross section of this cylindrical metal body 7 be shaped as rectangle, can obtain the better directional coupler of directivity.
Embodiment bis-
As shown in Figure 5, the place different from embodiment mono-is between backbone waveguide 1 and secondary ridge waveguide 2 to be parallel, there is no angle.Coupling aperture 3 all only has part in backbone waveguide 1 and secondary ridge waveguide 2 the insides, and some outside; Cylindrical metal body 7 is not set in coupling aperture 3.
Embodiment tri-
As shown in Figure 6, the place different from embodiment mono-is by 2 coupling apertures 3, to be communicated with between backbone waveguide 1 and secondary ridge waveguide 2, and the central point of two coupling apertures 3 lays respectively at the parallelogram formed is intersected in the backbone waveguide after overlooking direction projection two relative places, summit with secondary ridge waveguide.
Embodiment tetra-
As shown in Figure 7, the place different from embodiment tri-is that backbone waveguide 1 and 2 of secondary ridge waveguides are communicated with by a coupling aperture 3, the transition of curved waveguide 4 is arranged at the two ends of backbone waveguide 1, can obtain like this that directivity is better, the wider guide directional coupler of bandwidth, at the other end of curved ridges waveguide 4, connect ridge waveguide 5.
Just can realize preferably the utility model as mentioned above.
Claims (7)
1. ridge waveguide directional coupler is characterized in that: comprise the backbone waveguide (1) of mutual isolation and secondary ridge waveguide (2) 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) comprise the rectangular waveguide cavity body and be arranged on rectangular waveguide cavity body upper wall or and the loading conductor ridge of rectangular waveguide lower wall, backbone waveguide (1) and secondary ridge waveguide (2) isolation mutually, backbone waveguide (1) is communicated with secondary ridge waveguide (2) by 1 or 2 coupling apertures (3), at least 1 coupling aperture (3) comprises hollow tube coupling (32), and the coupling cavity (31) that is arranged on hollow tube coupling (32) sidewall, described hollow tube coupling (32) be attached to backbone waveguide (1) sidewall or and secondary ridge waveguide (2) sidewall, the hollow cavity that coupling cavity (31) is three end openings, 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
.
2. ridge waveguide directional coupler according to claim 1 is characterized in that: the projection of shape that hollow tube coupling (32) is overlooked direction at it is for semicircle, and the projection of shape that coupling cavity (31) is overlooked direction at it is for circular.
3. ridge waveguide directional coupler according to claim 1, it is characterized in that: be provided with metallic object (7) in described coupling aperture (3), wherein the axis of metallic object (7) is parallel with the axis of coupling aperture (3) and vertical with the axis axis vertical or secondary ridge waveguide (2) of backbone waveguide (1), and the cross section of cylindrical metal body (7) is triangle.
4. ridge waveguide directional coupler according to claim 1, it is characterized in that: the angle between the axis of the axis of described backbone waveguide (1) and secondary ridge waveguide (2) is between 0 ° to 170 °.
5. ridge waveguide directional coupler according to claim 1, it is characterized in that: the number of described coupling aperture (3) is 2 o'clock, the central point of two coupling apertures (3) lay respectively at backbone waveguide (1) and secondary ridge waveguide (2) after overlooking direction projection, intersect the parallelogram formed two relative summits directly over.
6. according to the described ridge waveguide directional coupler of any one in claim 1-5, it is characterized in that: the one or both ends of described backbone waveguide (1) also are connected with curved ridges waveguide (4).
7. according to the described ridge waveguide directional coupler of any one in claim 1-5, it is characterized in that: described backbone waveguide (1) Huo and secondary ridge waveguide (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 201220394033 CN202678495U (en) | 2012-08-10 | 2012-08-10 | Ridge waveguide directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220394033 CN202678495U (en) | 2012-08-10 | 2012-08-10 | Ridge waveguide directional coupler |
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| Publication Number | Publication Date |
|---|---|
| CN202678495U true CN202678495U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220394033 Expired - Fee Related CN202678495U (en) | 2012-08-10 | 2012-08-10 | Ridge waveguide directional coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780057A (en) * | 2012-08-10 | 2012-11-14 | 成都赛纳赛德科技有限公司 | Directional coupler with ridge waveguides |
-
2012
- 2012-08-10 CN CN 201220394033 patent/CN202678495U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780057A (en) * | 2012-08-10 | 2012-11-14 | 成都赛纳赛德科技有限公司 | Directional coupler with ridge waveguides |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20150810 |
|
| EXPY | Termination of patent right or utility model |