CN102800913A - Porous directional coupler with different main and sub rectangular coaxial line sizes - Google Patents
Porous directional coupler with different main and sub rectangular coaxial line sizes Download PDFInfo
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- CN102800913A CN102800913A CN2012102826197A CN201210282619A CN102800913A CN 102800913 A CN102800913 A CN 102800913A CN 2012102826197 A CN2012102826197 A CN 2012102826197A CN 201210282619 A CN201210282619 A CN 201210282619A CN 102800913 A CN102800913 A CN 102800913A
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Abstract
The invention discloses a porous directional coupler with different main and sub rectangular coaxial line sizes. The porous directional coupler comprises a main rectangular coaxial line and a sub rectangular coaxial line as well as coupling holes, wherein the main rectangular coaxial line and the sub rectangular coaxial line are isolated from each other; the main rectangular coaxial line is communicated with the sub rectangular coaxial line after passing through at least three coupling holes; at least one coupling hole comprises a hollow coupling tube which is attached to the side wall of the main rectangular coaxial line or/and the side wall of the sub rectangular coaxial line; the hollow coupling tube close to the side wall of the main rectangular coaxial line is connected with a coupling cavity with three open ends; the coupling cavity is communicated with the hollow coupling tube; the coupling cavity is positioned between the main rectangular coaxial line and the sub rectangular coaxial line and is communicated with the main rectangular coaxial line and the sub rectangular coaxial line; the coupling holes are arranged in an axial direction of the main rectangular coaxial line; and the adjacent coupling holes in the axial direction of the main rectangular coaxial line are positioned in one side of the main rectangular coaxial line; and the porous directional coupler with the different main and sub rectangular coaxial line sizes, disclosed by the invention, has the advantages of compact structure, simplicity in machining, large power capacity, ultra-large working bandwidth and low inserting loss.
Description
Technical field
The present invention relates to multi-hole directional coupler, specifically, relate to a kind of different multi-hole directional coupler of major-minor rectangular coaxial linear dimension that utilizes a plurality of holes to be coupled.
Background technology
Directional coupler is widely used a kind of microwave device in the microwave system, and its main effect is that microwave signal is carried out 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 constitute 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 is also mostly to be waveguide aperture coupling directional coupler; Its theoretical foundation is a Bethe aperture coupled wave theory, and 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; Because 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 have so just appearred subsequently.
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: poor like narrow bandwidth, directivity, only work is suitable at the design frequency place, departs from out this frequency, and directivity will reduce.
Though the tradition multi-hole directional coupler can be accomplished that very wide bandwidth, directivity also have very and improve; But also exist some shortcomings; Big like volume, requirement on machining accuracy is high, it is high to insert loss, 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.
Summary of the invention
The objective of the invention is to overcome some shortcomings of traditional directional coupler, a kind of compact is provided, has inserted that loss is low, the different multi-hole directional coupler of major-minor rectangular coaxial linear dimension in broadband.
To achieve these goals; The technical scheme that the present invention adopts is following: the multi-hole directional coupler that major-minor rectangular coaxial linear dimension is different comprises main rectangular coaxial line that mutual isolation and structure are consistent and secondary rectangular coaxial line and as the coupling aperture of coupling channel; Wherein main rectangular coaxial line and secondary rectangular coaxial line all are to be made up of rectangular waveguide and the built-in conductor that is arranged in the rectangular waveguide, have added another axis and the parallel axes of coupling aperture and the cylindrical metal body vertical with main rectangular coaxial bobbin thread in the wherein said coupling aperture; One end of this cylindrical metal body connects with the inwall of corresponding coupling aperture; The cross section of this cylindrical metal body be shaped as polygon; Main rectangular coaxial line is communicated with secondary rectangular coaxial line through at least 3 hole coupling apertures; At least 1 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 the conducting of secondary rectangular coaxial line
Said coupling aperture is arranged along the axis direction of main rectangular coaxial line, is positioned at a side of main rectangular coaxial bobbin thread along the adjacent coupling aperture of main rectangular coaxial bobbin thread direction; On the main rectangular coaxial bobbin thread direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength of main rectangular coaxial line 20% ~ 30% between
The size Expressing of main rectangular coaxial line is: a1*h1; The size Expressing of secondary rectangular coaxial line is: a2*h2; A1, a2 are expressed as the width of main rectangular coaxial line and secondary rectangular coaxial line outer conductor respectively, and h1, h2 are expressed as the height of main rectangular coaxial line and secondary rectangular coaxial line outer conductor respectively;
The size situation of the size of main rectangular coaxial line and secondary rectangular coaxial line is following:
Situation A: whenThe size of main rectangular coaxial line is during less than the size of secondary rectangular coaxial line,
H2*15%＜h1＜h2*85% or and a2*15%＜a1＜a2*85%;
Situation B: whenThe size of main rectangular coaxial line is during greater than the size of secondary rectangular coaxial line,
H1*15%＜h2＜h1*85% or and a1*15%＜a2＜a1*85%;
Situation C:When the size of main rectangular coaxial line equals the size of secondary rectangular coaxial line,
A1=a2 and h1=h2.
When the above-mentioned three kinds of condition of different of the selection of dimension of main rectangular coaxial line and secondary rectangular coaxial line, can obtain three kinds of different results.Past people all is the preferential transmission channel of selecting identical rectangular coaxial line as guide directional coupler, but when selecting situation A or situation B for use, can obtain low Insertion Loss, the better multi-hole directional coupler of directivity in millimere-wave band and terahertz wave band.Just this extra degree of freedom can help us to design the better multi-hole directional coupler of directivity.
Coupling aperture is circle in its projection of shape of overlooking on the direction, and coupling cavity is semicircle in its projection of shape of overlooking on the direction, and the hollow tube coupling is semicircle in its projection of shape of overlooking on the direction.Because traditional multi-hole directional coupler, the size of main rectangular coaxial line and secondary rectangular coaxial line all adopts same size, and the position of the coupling aperture in simultaneously traditional multi-hole directional coupler is arranged between main rectangular coaxial line and the secondary rectangular coaxial line.And improvement of the present invention is: 1, the position of traditional coupling aperture is adjusted; Design and adjust the coupling aperture that the back structure is complementary accordingly, promptly the coupling aperture among the present invention is made up of coupling cavity and hollow tube coupling, when wherein the position being set; Coupling cavity is arranged between main rectangular coaxial line and the secondary rectangular coaxial line; In order to be communicated with main rectangular coaxial line and secondary rectangular coaxial line,, can further strengthen coupling owing to also be provided with the hollow tube coupling; 2, because the experiment discovery; When we adopt main rectangular coaxial line and the secondary rectangular coaxial line of common size to design; The directivity of ordinary construction is than the good directionality of same size; Therefore, the main rectangular coaxial line and the secondary rectangular coaxial line that adopt among the present invention are adjusting the directivity of increase coupler that can be extra aspect the size.
Therefore when designing, preferentially be provided with hollow tube coupling in the coupling aperture be attached to main rectangular coaxial line sidewall or and secondary rectangular coaxial line sidewall.Further preferentially be set to: the size of main rectangular coaxial line and secondary rectangular coaxial line all adopts common size.
When being coupled output according to the above-mentioned coupler of preferentially being arranged to; Its course of work is: microwave is at first through main rectangular coaxial line; When structure coupling aperture place, through coupling cavity microwave is coupled to secondary rectangular coaxial line, under the effect of hollow tube coupling, add close coupling; Make its directivity grow, further because the size of main rectangular coaxial line and secondary rectangular coaxial line adopts common size; Therefore reinforcement can also further be coupled on the above-mentioned basis that adds close coupling.
Said cylindrical metal body portion is extended the inside of carrying out main rectangular coaxial line.
The axis of the built-in conductor of said main rectangular coaxial line and the axis of the built-in conductor of secondary rectangular coaxial line are parallel to each other.
Said main rectangular coaxial line or and the one or both ends of secondary rectangular coaxial line also be connected with curved waveguide.
Said 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.
The part of coupling aperture is at main rectangular coaxial line or beyond the secondary rectangular coaxial line, or the while is outside main rectangular coaxial line and secondary rectangular coaxial line.
Single-hole directional coupler has narrow relatively bandwidth on directivity, so people have expected a series of coupling apertures of design, this a series of coupling aperture is formed an array, and several arrays can also stack up, and come the comprehensive degree of coupling and directional responses thus.Utilize the directivity of aperture and the directivity of array to superpose, just can obtain better directivity, and this extra degree of freedom can also improve bandwidth in coupled end.
After the main rectangular coaxial line one side arrangement in coupling aperture edge; Under the condition that satisfies the coupling reinforcement; Be adjacent two coupling apertures the hole in the heart apart from should be arranged on main rectangular coaxial line the central task frequency guide wavelength 20% ~ 30% between; Can reduce volume adding on the basis of close coupling, thereby further improve the superiority of this porous rectangular waveguide directional coupler.
Simultaneously, preferentially selecting cross section is that rectangle column metallic object is arranged in the coupling aperture, and the position of cylindrical metal body in coupling aperture is unrestricted, can be provided with according to the actual requirements.
Angle between the axis of general main rectangular coaxial line and the axis of secondary rectangular coaxial line is between 0 ° to 180 °.For the volume that makes its whole coupler reduces, we pay the utmost attention to the parallel axes setting of the axis and the secondary rectangular coaxial line of main rectangular coaxial line.
Coupling aperture is unrestricted in its projection of shape of overlooking direction, and when considering cost of manufacture, we pay the utmost attention to circle or the triangle or the quadrangle of the simple and easy batch process of ability.
When increasing the cylindrical metal body, said coupling aperture and cylindrical metal body body are Y font 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 main rectangular coaxial line and the secondary rectangular coaxial line.And improvement of the present invention is: 1, the position of traditional coupling aperture is adjusted; Design and adjust the coupling aperture that the back structure is complementary accordingly, promptly the coupling aperture among the present invention is made up of coupling cavity and hollow tube coupling, when wherein the position being set; Coupling cavity is arranged between main rectangular coaxial line and the secondary rectangular coaxial line; In order to be communicated with main rectangular coaxial line and secondary rectangular coaxial line,, can further strengthen coupling owing to also be provided with the hollow tube coupling; 2, because the experiment discovery; When we select a plurality of coupling aperture for use; The directivity that adjacent coupling aperture is arranged along the axis of main rectangular coaxial line is better, when therefore designing, preferentially be provided with hollow tube coupling in the coupling aperture be attached to main rectangular coaxial line sidewall or and secondary rectangular coaxial line sidewall.Further preferentially be set to: adjacent coupling aperture is positioned at a side of main rectangular coaxial line.
When being coupled output according to the above-mentioned coupler of preferentially being arranged to; Its course of work is: microwave is at first through main rectangular coaxial line; When structure coupling aperture place, through coupling cavity microwave is coupled to secondary rectangular coaxial line, under the effect of hollow tube coupling, add close coupling; Make its directivity grow, further because adjacent coupling aperture is positioned at a side of main rectangular coaxial line; Therefore reinforcement can also further be coupled on the above-mentioned basis that adds close coupling.
Based on said structure; The present invention compared to its improvement of multi-hole directional coupler in the past is: traditional coupling aperture is improved to the coupling channel of being made up of coupling cavity and hollow tube coupling; Wherein coupling cavity is arranged between main rectangular coaxial line and the 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.
Because the present invention adopts the design of a plurality of coupling apertures; Has the effect that coupling is strengthened between coupling aperture and the coupling aperture; If the permutation and combination between coupling aperture and the coupling aperture can not reach suitable arranging, then can cause many unfavorable factors, weaken phenomenon such as coupling; We arrange to it and have done corresponding research for this reason; For volume that reduces whole coupling and the effect that reaches the coupling reinforcement, the further improvement of the present invention is: coupling aperture is arranged along the axis of main rectangular coaxial line, is positioned at a side of main rectangular coaxial bobbin thread along the adjacent coupling aperture of main rectangular coaxial bobbin thread direction; On the main rectangular coaxial bobbin thread direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength of the central task frequency of main rectangular coaxial line 20% ~ 30% between.Be about to the side that adjacent coupling aperture is distributed in main rectangular coaxial bobbin thread successively.After adjacent coupling aperture distributes along main rectangular coaxial line one side, the reinforcement that can further be coupled, thus further improve the directivity of the different multi-hole directional coupler of this major-minor rectangular coaxial linear dimension; The hole of the adjacent two coupling apertures influencing factor of distance is in the heart determined by input signal; In addition, because the coupling aperture among the present invention all is positioned at the same side of main rectangular coaxial line, therefore be compared to other arrangement mode; Its volume is less; Be arranged in both sides like coupling aperture, compare with both sides, the design volume of an obvious side is less than the design volume of both sides.
Based on above-mentioned improvement, produce in batches for ease, generally we do not limit the shape of coupling cavity, and the shape of restriction hollow tube coupling, the shape of hollow tube coupling can be circle, can be rectangle that ordinary priority is considered circular.
The present invention is directed to traditional coaxial line directional coupler and make corresponding improvement; Its improvement is: 1, that tradition is built-in coupling aperture is external; Be about to make after the position adjustment of coupling aperture the hollow tube coupling be attached to main rectangular coaxial line sidewall or and secondary rectangular coaxial line sidewall on, can strengthen its directional performance through the structure after improving; 2, be loose structure with traditional single hole structure and the single hole architecture advances after the above-mentioned improvement; Generally be identified as loose structure with the coupling aperture more than 3 or 3; Behind loose structure, be not only to accelerate to exceed, when accelerating, also want the state of arranging in Considering Coupling Effect hole; The words of arranging arbitrarily might weaken its performance, and this and initial purpose of the present invention are disagreed.Therefore; In order to reach the problem that strengthens directivity; The present invention adopts the coupling aperture more than 3 or 3, and ordinary priority takes into account that line interlacing arranges when arranging, and the distance between the adjacent coupling aperture is by the wavelength decision of microwave; Also can consider coupling aperture is arranged in simultaneously the same side of main rectangular coaxial bobbin thread, the distance between its adjacent coupled hole is also determined by the wavelength of output microwave.
The operation principle of multi-hole directional coupler can be narrated as follows:
Because the waveguide inwall can be similar to and regard the ideal conducting plane as.According to the boundary condition of alternating electromagnetic field, ideal conducting plane E has only and the perpendicular component in surface, does not have tangential component; Magnetic field H has only the component tangent with the surface, does not have normal component.The public broadside of main waveguide internal electric field vertical major-minor rectangular coaxial line reaches that a part of electric field that complementary wave leads still perpendicular to the public broadside of major-minor waveguide through aperture, and its power line forms an elbow.Magnetic field (magnetic line of force) is the closed curve of parallel main Guide of Wide Wall, pierces into the full curve that passes secondary rectangular coaxial line so the magnetic field of main waveguide (magnetic line of force) forms one group at the aperture place.
Get into that a part of electric field that complementary wave leads through aperture and lead the coupling aperture both sides electric field E vertically downward that is coupled out at complementary wave
'The electric field E of alternation
'Inspire the magnetic field H of inducting
'(direction is determined by S=E*H).Electricity, magnetic field alternately excites, and forms the electromagnetic wave of exporting to coupled end and isolation end respectively.
The coupling aperture both sides level of being coupled out magnetic field H is to the right led at complementary wave in that a part of magnetic field through aperture entering complementary wave is led
'Alternating magnetic fields H
'Inspire the electric field E that inducts
'Electricity, magnetic field alternately excites, and forms the electromagnetic wave of exporting to coupled end and isolation end respectively.
The aperture coupling is above-mentioned electric coupling and magnetic-coupled stack.The electromagnetic wave that forms two kinds of couplings merges, and we can find out that the electromagnetic wave that transmits 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 is so be not have coupling output in principle.But because aperture is electric, 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 the comprehensive degree of coupling and directional responses thus.Utilize the directivity of aperture and the directivity of array to superpose, just can obtain better directivity, and this extra degree of freedom can also improve bandwidth in coupled end.
The invention has the advantages that compact conformation, processing are simple, big, the ultra wide bandwidth of operation of power capacity, to insert loss low, particularly at millimeter wave and terahertz wave band, compares with common multi-hole directional coupler, has outstanding advantage aspect the low Insertion Loss.Compact of the present invention is positioned at the electronic system that main rectangular coaxial line one side porous rectangular waveguide directional coupler is expected to be widely used in each microwave band and terahertz wave band.
Description of drawings
Fig. 1 is the stereogram during main rectangular coaxial line one side for adjacent coupled hole among the present invention is positioned at.
Fig. 2 is the structural perspective of coupling aperture.
Fig. 3 is the vertical view of the embodiment of the invention one.
Fig. 4 is the A-A profile of the embodiment of the invention one.
Fig. 5 is the vertical view of the embodiment of the invention two.
Fig. 6 is the vertical view of the embodiment of the invention three.
Fig. 7 is the vertical view of the embodiment of the invention four.
Fig. 8 is the vertical view of the embodiment of the invention five.
Fig. 9 is the vertical view of the embodiment of the invention six.
Label among the 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 present invention is done to specify further, but embodiment of the present invention is not limited thereto.
Like Fig. 1, shown in 2, the multi-hole directional coupler that major-minor rectangular coaxial linear dimension is different comprises 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 isolated with secondary rectangular coaxial line 2 each other; Coupling aperture 3 comprise be attached to main rectangular coaxial line 1 sidewall or and the hollow tube coupling 32 of secondary rectangular coaxial line 2 sidewalls; Hollow tube coupling 32 is connected with the coupling cavity 31 of three end openings near the sidewall of main rectangular coaxial line 1; Coupling cavity 31 and 32 conductings of hollow tube coupling, coupling cavity 31 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 conductings
.Wherein, the number of coupling aperture 3 is 3; Coupling aperture 3 is circle in its projection of shape of overlooking direction, 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, is positioned at a side of main rectangular coaxial line 1 axis along the adjacent coupling aperture of main rectangular coaxial line 1 axis direction; On main rectangular coaxial line 1 axis direction, the hole of adjacent two coupling apertures 3 in the heart apart from the guide wavelength of the central task frequency of the central task frequency of main rectangular coaxial line 1 23% ~ 27% between.
Because the present invention adopts the design of a plurality of coupling apertures; Has the effect that coupling is strengthened between coupling aperture and the coupling aperture; If the permutation and combination between coupling aperture and the coupling aperture can not reach suitable arranging, then can cause many unfavorable factors, weaken phenomenon such as coupling; We arrange to it and have done corresponding research for this reason; For volume that reduces whole coupling and the effect that reaches the coupling reinforcement, the further improvement of the present invention is: coupling aperture is arranged along the axis direction of main rectangular coaxial line, is positioned at a side of main rectangular coaxial bobbin thread along the adjacent coupling aperture of main rectangular coaxial bobbin thread direction; On the main rectangular coaxial bobbin thread direction, the hole of adjacent two coupling apertures in the heart apart from the guide wavelength of main rectangular coaxial line 23% ~ 27% between.Adjacent coupling aperture is distributed in a side of main rectangular coaxial bobbin thread successively, and after adjacent coupling aperture distributed along main rectangular coaxial line one side, reinforcement can further be coupled; Thereby further improve the directivity of the different multi-hole directional coupler of this major-minor rectangular coaxial linear dimension, the hole of adjacent two coupling apertures in the heart the influencing factor of distance by input microwave decision, in addition; Because the coupling aperture among the present invention all is positioned at the same side of main rectangular coaxial line; Therefore be compared to other arrangement mode, its volume is less, is arranged in both sides like coupling aperture; Compare with both sides, the design volume of an obvious side is less than the design volume of both sides.
The size Expressing of wherein main rectangular coaxial line 1 is: a1*h1; The size Expressing of secondary rectangular coaxial line 2 is: a2*h2; A1, a2 are expressed as the outer conductor width of main rectangular coaxial line 1 and secondary rectangular coaxial line 2 respectively, and h1, h2 are expressed as the outer conductor height of main rectangular coaxial line 1 and secondary rectangular coaxial line 2 respectively;
The size situation of the size of main rectangular coaxial line 1 and secondary rectangular coaxial line 2 is following:
Situation A: when the size of main rectangular coaxial line during less than the size of secondary rectangular coaxial line,
H2*15%＜h1＜h2*85% or and a2*15%＜a1＜a2*85%;
Situation B: when the size of main rectangular coaxial line during greater than the size of secondary rectangular coaxial line,
H1*15%＜h2＜h1*85% or and a1*15%＜a2＜a1*85%;
Situation C: when the size of main rectangular coaxial line equals the size of secondary rectangular coaxial line,
A1=a2 and h1=h2.
During use, microwave advances coupling from main rectangular coaxial line 1 input in coupling aperture; Microwave gets into secondary rectangular coaxial line, carries out array arrangement because coupling aperture is provided with the requirement of satisfying the enhancing coupling, therefore; Will further strengthen coupling between coupling aperture, reach with this and add close coupling.The compare coupled structure of single hole, the present invention adopts a plurality of coupling apertures to strengthen coupling and arranges, and can further improve its degree of coupling.
Its improvement of multi-hole directional coupler compared in the past is: traditional coupling aperture is improved to the coupling channel of being made up of coupling cavity 31 and hollow tube coupling 32; Wherein coupling cavity 31 is arranged between main rectangular coaxial line 1 and the secondary rectangular coaxial line 2 it, hollow tube coupling 32 be attached to main rectangular coaxial line 1 sidewall or and secondary rectangular coaxial line 2 sidewalls; Can increase its directivity like this.
Simultaneously, compared in the past its improvement of multi-hole directional coupler be: adopt identical rectangular coaxial line architecture advances for adopting ordinary rectangular coaxial line structure tradition, the size situation of the size of promptly main rectangular coaxial line and secondary rectangular coaxial line is following:
Situation A: when the size of main rectangular coaxial line during less than the size of secondary rectangular coaxial line,
H2*15%＜h1＜h2*85% or and a2*15%＜a1＜a2*85%;
Situation B: when the size of main rectangular coaxial line during greater than the size of secondary rectangular coaxial line,
H1*15%＜h2＜h1*85% or and a1*15%＜a2＜a1*85%;
Situation C: when the size of main rectangular coaxial line equals the size of secondary rectangular coaxial line,
A1=a2 and h1=h2.
Can further increase its directivity like this.
Embodiment one
Like Fig. 3, shown in 4, 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 is isolated with secondary rectangular coaxial line 2 each other, is communicated with through 5 coupling apertures 3; The part of 5 coupling apertures 3 is at main rectangular coaxial line 1 with beyond the secondary rectangular coaxial line 2.The axis normal of the axis of said coupling aperture 3 and main rectangular coaxial line 1, its cross section be shaped as irregular polygon; Adjacent coupled hole 3 is positioned at a side of main rectangular coaxial line; 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 of the central task frequency of the central task frequency of main rectangular coaxial line 1 23% ~ 27% between; All added in each coupling aperture 3 another axis and coupling aperture 3 parallel axes and with the cylindrical metal body 4 of the axis normal of main rectangular coaxial line 1, the cross section of this cylindrical metal body 4 be shaped as rectangle.
Embodiment two
As shown in Figure 5; With embodiment one different place is to have 4 coupling apertures 3 to be positioned at the same side of main rectangular coaxial line; The hole in adjacent coupled hole 3 in the heart apart from the guide wavelength of the central task frequency of the central task frequency of main rectangular coaxial line 1 23% ~ 27% between, its coupling performance is better.4 of each cylindrical metal bodies connect with the inwall of corresponding coupling aperture 3 and are positioned on the different azimuth of coupling aperture 3 in a direction, and its particular location is decided by parameter optimizations such as directivity.
Embodiment three
As shown in Figure 6, be that the two ends of secondary rectangular coaxial line 2 also are connected with curved waveguide 5, at the distribution structure that opposite side also is connected with and mate in the external world of curved waveguide 5 with embodiment one different place.Can make things convenient for being connected of this directional coupler and extraneous device like this, thereby it is better to obtain directivity, the porous rectangular waveguide directional coupler that bandwidth is wideer.
Embodiment four
As shown in Figure 7, with embodiment one different place be the cross section of coupling aperture 3 for oval, and all be provided with the cylindrical metal body 4 that shape of cross section is a rectangle in the coupling aperture 3.
Embodiment five
As shown in Figure 8, be that the cross section of coupling aperture 3 is a rectangle with embodiment four different places, and cylindrical metal body 4 is not set in the coupling aperture 3.
Embodiment six
As shown in Figure 9, the cross section of different with embodiment five is coupling aperture 3 is a triangle.
Just can realize the present invention preferably as stated.
Claims (4)
1. the different multi-hole directional coupler of major-minor rectangular coaxial linear dimension is characterized in that: comprise main rectangular coaxial line (1) that mutual isolation and structure are consistent and secondary rectangular coaxial line (2) and as the coupling aperture (3) of coupling channel; Wherein main rectangular coaxial line (1) and secondary rectangular coaxial line (2) all are to be made up of rectangular waveguide and the built-in conductor that is arranged in the rectangular waveguide, added in the wherein said coupling aperture (3) another axis and coupling aperture (3) parallel axes and with the cylindrical metal body (4) of main rectangular coaxial line (1) axis normal; One end of this cylindrical metal body (4) connects with the inwall of corresponding coupling aperture (3); The cross section of this cylindrical metal body (4) be shaped as polygon; Main rectangular coaxial line (1) is communicated with secondary rectangular coaxial line (2) through at least 3 hole coupling apertures (3); At least 1 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 the secondary rectangular coaxial line (2) and with main rectangular coaxial line (1) and secondary rectangular coaxial line (2) conducting
Said coupling aperture (3) is arranged along the axis direction of main rectangular coaxial line (1), is positioned at a side of main rectangular coaxial line (1) axis along the adjacent coupling aperture (3) of main rectangular coaxial line (1) axis direction; 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 of main rectangular coaxial line (1) 20% ~ 30% between
The size Expressing of main rectangular coaxial line (1) is: a1*h1; The size Expressing of secondary rectangular coaxial line (2) is: a2*h2; A1, a2 are expressed as the width of main rectangular coaxial line (1) and secondary rectangular coaxial line (2) outer conductor respectively, and h1, h2 are expressed as the height of main rectangular coaxial line (1) and secondary rectangular coaxial line (2) outer conductor respectively;
The size situation of the size of main rectangular coaxial line (1) and secondary rectangular coaxial line (2) is following:
Situation A: whenThe size of main rectangular coaxial line (1) is during less than the size of secondary rectangular coaxial line (2),
H2*15%＜h1＜h2*85% or and a2*15%＜a1＜a2*85%;
Situation B: whenThe size of main rectangular coaxial line (1) is during greater than the size of secondary rectangular coaxial line (2),
H1*15%＜h2＜h1*85% or and a1*15%＜a2＜a1*85%;
Situation C:When the size of main rectangular coaxial line (1) equals the size of secondary rectangular coaxial line (2),
A1=a2 and h1=h2.
2. the different multi-hole directional coupler of major-minor rectangular coaxial linear dimension according to claim 1; It is characterized in that: coupling aperture (3) is circle in its projection of shape of overlooking on the direction; Coupling cavity (31) is semicircle in its projection of shape of overlooking on the direction, and hollow tube coupling (32) is semicircle in its projection of shape of overlooking on the direction.
3. the different multi-hole directional coupler of major-minor rectangular coaxial linear dimension according to claim 2 is characterized in that: said cylindrical metal body (4) part is extended the inside of carrying out main rectangular coaxial line (1).
4. the different multi-hole directional coupler of major-minor rectangular coaxial linear dimension according to claim 1 is characterized in that: the axis of the axis of the built-in conductor of said main rectangular coaxial line (1) and the built-in conductor of secondary rectangular coaxial line (2) is parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282619.7A CN102800913B (en) | 2012-08-10 | 2012-08-10 | Porous directional coupler with different main and sub rectangular coaxial line sizes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282619.7A CN102800913B (en) | 2012-08-10 | 2012-08-10 | Porous directional coupler with different main and sub rectangular coaxial line sizes |
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| CN102800913A true CN102800913A (en) | 2012-11-28 |
| CN102800913B CN102800913B (en) | 2014-05-21 |
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| CN201210282619.7A Expired - Fee Related CN102800913B (en) | 2012-08-10 | 2012-08-10 | Porous directional coupler with different main and sub rectangular coaxial line sizes |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333107U (en) * | 2011-11-17 | 2012-07-11 | 成都赛纳赛德科技有限公司 | Ridge waveguide directional coupler |
| CN202817153U (en) * | 2012-08-10 | 2013-03-20 | 成都赛纳赛德科技有限公司 | Multi-hole directional coupler provided with main/auxiliary rectangular coaxial lines of different sizes |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333107U (en) * | 2011-11-17 | 2012-07-11 | 成都赛纳赛德科技有限公司 | Ridge waveguide directional coupler |
| CN202817153U (en) * | 2012-08-10 | 2013-03-20 | 成都赛纳赛德科技有限公司 | Multi-hole directional coupler provided with main/auxiliary rectangular coaxial lines of different sizes |
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| CN102800913B (en) | 2014-05-21 |
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