CN202678491U - Multi-hole microtrip directional coupler with coupling holes distributed in staggered manner - Google Patents
Multi-hole microtrip directional coupler with coupling holes distributed in staggered manner Download PDFInfo
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- CN202678491U CN202678491U CN 201220393945 CN201220393945U CN202678491U CN 202678491 U CN202678491 U CN 202678491U CN 201220393945 CN201220393945 CN 201220393945 CN 201220393945 U CN201220393945 U CN 201220393945U CN 202678491 U CN202678491 U CN 202678491U
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Abstract
The utility model discloses a multi-hole microtrip directional coupler with coupling holes distributed in a staggered manner. The multi-hole microtrip directional coupler comprises a main microtrip, an auxiliary microtrip and coupling holes; the main microtrip and the auxiliary microtrip are isolated from each other through a grounding face therebetween; the main microtrip is communicated with the auxiliary microtrip through at least three coupling holes positioned on the grounding face; the projection of the coupling holes is round or polygonal in the overhead view direction; and adjacent coupling holes along the axis direction of the main microtrip are distributed on the left side and the right side of the axis of the main microtrip in a staggered manner. The multi-hole microtrip directional coupler has the advantages of compact structure, simplicity in processing, ultra-wide operation bandwidth, large power capacity and low insertion loss, particularly in the wave range of millimeter waves; and compared with a common multi-hole directional coupler, the multi-hole microtrip directional coupler has outstanding advantages in the aspect of low insertion loss.
Description
Technical field
The utility model relates to multi-hole directional coupler, specifically, relates to the porous microstrip 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 microstrip 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 microstrip directional coupler that coupling aperture is interspersed comprises the parallel to each other and micro-band of master mutual isolation of axis and secondary micro-band and as the coupling aperture of coupling channel; The structure of main micro-band and secondary micro-band is consistent, and wherein main micro-band and secondary micro-band all consist of dielectric layer printing upper conductor band; Main micro-band and secondary micro-band are isolated mutually by ground plane, and main micro-band is communicated with secondary micro-band by least 3 coupling apertures, coupling aperture be arranged on the ground plane between the micro-band of master and secondary micro-band and with the micro-band of master and secondary micro-band conducting; The projection of shape that coupling aperture is overlooked on direction at it is circle or rectangle or triangle; Described coupling aperture is arranged along the axis direction of main micro-band, along the adjacent coupling aperture of main micro-zone axis direction, is interspersed successively in left side and the right side of main micro-zone axis; Along on main micro-zone axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength of the central task frequency at main micro-band 20% ~ 30% between.
The projection of shape that coupling aperture 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 coupling aperture is overlooked on direction at it is rectangle.
Added parallel with the axis of coupling aperture and vertical with the main micro-zone axis cylindrical metal body of another axis in described coupling aperture, the inwall connection of this cylindrical metal body one end and corresponding coupling aperture, the cross section of this cylindrical metal body be shaped as polygon; The all or part of inside that is positioned at main micro-band of described cylindrical metal body.
The one or both ends of the micro-band of described master or secondary micro-band also are connected with crooked micro-band.
Described master micro-band Huo and secondary micro-band 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 micro-band, simultaneously in order to increase the bore of coupling aperture, and the left side and the right side that are distributed in main micro-zone axis 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 the guide wavelength of the central task frequency that should be arranged on main micro-band 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 micro-band and the axis of secondary micro-band 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 aperture on the ground plane between main micro-band and secondary micro-band, and with the conductor belt of main micro-band and the conductor belt conducting of secondary micro-band.Can increase its directivity like this.
Owing to there being a plurality of coupling apertures, its a plurality of coupling apertures can make between micro-band to reach the effect that coupling is strengthened, for the aperture that makes coupling aperture, strengthen simultaneously, the further improvement of the utility model is: coupling aperture is arranged along the axis of main micro-band, along the adjacent coupling aperture of main micro-zone axis direction, is interspersed successively in left side and the right side of main micro-zone axis; Along on main micro-zone axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength of the central task frequency at main micro-band 20% ~ 30% between.After adjacent coupling aperture is interspersed, in unit are, because we adopt the both sides of the staggered micro-band of master 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 degree of coupling and the directivity of this porous microstrip directional coupler further improved.
What general microstrip directional coupler adopted is all the parallel coupling principle, and the utility model adopts, is the aperture coupling principle, and, within whole microstrip directional coupler all is sealed in screening cover, can further improve like this directivity of this directional coupler.
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 vertical major-minor of main waveguide internal electric field is micro-is with public broadside, by aperture, reaches that a part of electric field that complementary wave leads still perpendicular to the public broadside of major-minor waveguide, 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 micro-band.
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 that compact conformation, processing are simple, large, the super wide bandwidth of operation of power capacity, insertion loss be low.Compact multi-hole directional coupler of the present utility model is expected to be widely used in the electronic system of each microwave 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 micro-band in the utility model and the axis of secondary micro-band are parallel.
The vertical view that Fig. 2 is the utility model embodiment mono-.
The A-A profile that Fig. 3 is the utility model embodiment mono-.
The vertical view that Fig. 4 is the utility model embodiment bis-.
The vertical view that Fig. 5 is the utility model embodiment tri-.
The vertical view that Fig. 6 is the utility model embodiment tetra-.
The vertical view that Fig. 7 is the utility model embodiment five.
Label in figure is expressed as respectively: 1, lead micro-band; 2, secondary micro-band; 3, coupling aperture; 4, cylindrical metal body; 5, crooked micro-band; 6, conductor belt; 7, ground plane.
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, the porous microstrip directional coupler that coupling aperture is interspersed, comprise as the master of microwave main channel micro-with 1 and micro-with 2 and as the coupling aperture 3 of coupling channel as the pair of sampled signal passage; Main micro-with 1 and secondary micro-structure with 2 consistent, wherein main micro-with 1 with secondary micro-ly all by dielectric layer, print upper conductor band 6 with 2 and form; The master is micro-is with 1 with secondary micro-, to be with 2 mutually to isolate; Coupling aperture 3 main micro-with 1 and secondary micro-ground plane 7 between with 2 on and micro-ly be with 1 and secondary micro-ly be with 2 conductings with main
.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 main micro-axis and secondary micro-axis with 2 with 1 is parallel to each other.Coupling aperture 3 is arranged along main micro-axis with 1, along main micro-coupling aperture adjacent with 1 axis direction, is interspersed successively in main micro-left side with 1 axis and right side; Along main micro-being with on 1 axis direction, the hole of adjacent two coupling apertures 3 in the heart apart from main micro-guide wavelength with 1 central task frequency 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 aperture on the ground plane between main micro-band and secondary micro-band, and with the conductor belt of main micro-band and the conductor belt conducting of secondary micro-band; 2, the left side and the right side that are distributed in main micro-zone axis 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 direction of main micro-band, along the adjacent coupling aperture of main micro-zone axis direction, is interspersed successively in left side and the right side of main micro-zone axis; Along on main micro-zone axis direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength of the central task frequency at main micro-band 20% ~ 30% between.After adjacent coupling aperture is interspersed, in unit are, because we adopt the both sides that alternately coupling aperture are arranged in to main micro-band, so certainly will be under the condition of identical hole count, we just can increase the bore of coupling aperture, so close coupling be can add further again, thereby the degree of coupling and the directivity of this square porous microstrip directional coupler further improved.
Embodiment mono-
As shown in Figure 2,3, the present embodiment comprises being provided with main micro-ly is with 1 and secondary micro-ly be with 2, mainly micro-ly is with 1 for the microwave main channel, secondary micro-ly is with 2 for the sampled signal passage; The master is micro-is with 1 with secondary micro-, to be with 2 mutually to isolate, and the master is micro-is with 1 with pair is micro-, to be with 2 by 3 connections of 5 coupling apertures; The projection section of 5 coupling apertures 3 main micro-with 1 conductor belt and secondary micro-with 2 conductor belt beyond.The axis of described coupling aperture 3 is vertical with main micro-axis with 1, its cross section be shaped as irregular polygon; Coupling aperture 3 is positioned at the both sides of main micro-band, and along main micro-being with on 1 axis direction, the hole of adjacent two coupling apertures is in the heart apart between main micro-guide wavelength 22% ~ 28% with 1 central task frequency.In each coupling aperture 3, added another axis parallel with the axis of coupling aperture 3 and with main micro-cylindrical metal body 4 vertical with 1 axis, the cross section of this cylindrical metal body 4 be shaped as rectangle.
Embodiment bis-
As shown in Figure 4, the place different from embodiment mono-is main micro-with 1 with secondary micro-ly be communicated with and secondary micro-two ends with 2 also are connected with and crookedly micro-ly are with 5 by 4 coupling apertures 3 with 2, at the micro-other end with 5 of bending, also is 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 5, the place different from embodiment one is that 5 coupling apertures 3 are interspersed main micro-with 1 both sides, and the cross section of coupling aperture 3 be ellipse, and does not all add column metallic object 4 in coupling aperture 3.
Embodiment tetra-
As shown in Figure 6, 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 7, 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 (7)
1. the porous microstrip directional coupler that coupling aperture is interspersed is characterized in that: comprise the parallel to each other and micro-band of master mutual isolation (1) of axis and secondary micro-band (2) and as the coupling aperture (3) of coupling channel; Main micro-band (1) is consistent with the structure of secondary micro-band (2), and wherein main micro-band (1) and secondary micro-band (2) all consist of dielectric layer printing upper conductor band (6); Main micro-band (1) and secondary micro-band (2) are by the isolation mutually of the ground plane (7) between them, main micro-band (1) is communicated with secondary micro-band (2) by least 3 coupling apertures (3), coupling aperture (3) be arranged on ground plane (7) between main micro-band (1) and secondary micro-band (2) above and with master's micro-band (1) and secondary micro-band (2) conducting; Described coupling aperture (3) is arranged along the axis direction of main micro-band (1), along the adjacent coupling aperture (3) of main micro-band (1) axis direction, is interspersed successively in left side and the right side of main micro-band (1) axis; Along on main micro-band (1) axis direction, the hole of adjacent two coupling apertures (3) in the heart apart from the guide wavelength of the central task frequency at main micro-band (1) 20% ~ 30% between.
2. the porous microstrip 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.
3. the porous microstrip 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.
4. the porous microstrip 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.
5. the porous microstrip directional coupler that coupling aperture according to claim 1 is interspersed, it is characterized in that: added parallel with the axis of coupling aperture (3) and vertical with main micro-band (1) axis cylindrical metal body (4) of another 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; The all or part of inside that is positioned at main micro-band (1) of described cylindrical metal body (4).
6. according to the porous microstrip directional coupler that in claim 1-5, the described coupling aperture of any one is interspersed, it is characterized in that: the one or both ends of the micro-band of described master (1) or secondary micro-band (2) also are connected with crooked micro-band (5).
7. according to the porous microstrip directional coupler that in claim 1-5, the described coupling aperture of any one is interspersed, it is characterized in that: the micro-band of described master (1) Huo and secondary micro-band (2) are connected with the matching structure with extraneous device matching in its one or both ends.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393945 CN202678491U (en) | 2012-08-10 | 2012-08-10 | Multi-hole microtrip directional coupler with coupling holes distributed in staggered manner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393945 CN202678491U (en) | 2012-08-10 | 2012-08-10 | Multi-hole microtrip directional coupler with coupling holes distributed in staggered manner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790254A (en) * | 2012-08-10 | 2012-11-21 | 成都赛纳赛德科技有限公司 | Porous micro-strip directional coupler with staggered coupling holes |
| CN104934725A (en) * | 2015-06-26 | 2015-09-23 | 中国船舶重工集团公司第七二四研究所 | Inner monitor network module for digital phased-array antenna |
-
2012
- 2012-08-10 CN CN 201220393945 patent/CN202678491U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790254A (en) * | 2012-08-10 | 2012-11-21 | 成都赛纳赛德科技有限公司 | Porous micro-strip directional coupler with staggered coupling holes |
| CN104934725A (en) * | 2015-06-26 | 2015-09-23 | 中国船舶重工集团公司第七二四研究所 | Inner monitor network module for digital phased-array antenna |
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| Date | Code | Title | Description |
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| 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 |
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| EXPY | Termination of patent right or utility model |