CN104332712B - Present broadband and wide wave beam ridged horn in a kind of end - Google Patents
Present broadband and wide wave beam ridged horn in a kind of end Download PDFInfo
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- CN104332712B CN104332712B CN201410675157.4A CN201410675157A CN104332712B CN 104332712 B CN104332712 B CN 104332712B CN 201410675157 A CN201410675157 A CN 201410675157A CN 104332712 B CN104332712 B CN 104332712B
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Abstract
The invention discloses a kind of end feedback broadband and wide wave beam ridged horn, including rectangular horn shell（1）, trapezoidal waveguide ridge（2）And coaxial connector（3）, trapezoidal waveguide ridge（2）It is arranged at rectangular horn shell（1）Inwall on and with rectangular horn shell（1）, coaxial connector（3）It is fixedly connected, rectangular horn shell（1）With trapezoidal waveguide ridge（2）Collectively constitute ridge waveguide structure.Using the less feature of ridge waveguide structure size, adjust the bore of waveguide, change the inwall spacing of trapezoidal waveguide ridge and rectangular horn shell, adjustment trapezoidal waveguide ridge and coaxial connector spacing, export ridge transformation formula waveguide coaxial connecter to realize matching between the Ω of coaxial input impedance 50 and the Ω of output end free space wave impedance 377 using end face.The present invention can realize broadband best match and can meet covering requirement in angle wide, and in the frequency band range of a nearly octave, input standing wave VSWR is less than 1.5, and directional diagram disclosure satisfy that antenna scanning needs.
Description
Technical field
The present invention relates to a kind of Radar Antenna Structure, more particularly to a kind of end feedback broadband and wide wave beam ridged horn.
Background technology
Radiating element wave beam in two dimensional phased battle array radar is wide, and physical dimension is small, and matching is difficult, the quality of its performance
Performance that can be directly on radar antenna produces influence.The broadband and wideangle matching of radiating element is to realize radar Sidelobe and less
Swept gain loss creates condition.
The bore E faces of the requirement according to aerial array to the electric characteristics and physical dimension of radiating element, i.e. loudspeaker are less than
56mm, H face are less than 68mm.Conventional criteria waveguide dimensions under this bore cannot meet requirement.
Existing Broadband Horn Antenna includes standard waveguide loudspeaker and broadband ridged horn form, and standard waveguide loudspeaker generally may be used
Meet Broadband Matching, but its physical dimension limitation, it is impossible to the compression of its waveguide broadside, therefore standard waveguide loudspeaker cannot be met
Use requirement.Broadband ridged horn is generally used in broadband ultra wide band field, and its broad beam characteristic cannot meet use requirement.
Therefore prior art cannot meet and both ensure that physical dimension was small, beam angle requirement again wide.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided one kind can realize that broadband best match again can be full
The end feedback broadband and wide wave beam ridged horn that the covering of foot breadth angle is required, in the frequency band range of a nearly octave, is input into standing wave VSWR
Less than 1.5, directional diagram disclosure satisfy that antenna scanning needs.
The purpose of the present invention is achieved through the following technical solutions：Broadband and wide wave beam ridged horn is presented at a kind of end, including
Rectangular horn shell, trapezoidal waveguide ridge and coaxial connector, trapezoidal waveguide ridge be arranged on the inwall of rectangular horn shell and with
Rectangular horn shell, coaxial connector are fixedly connected, and rectangular horn shell collectively constitutes ridge waveguide structure with trapezoidal waveguide ridge.
The waveguide broadside length of the rectangular horn shell is a, and Narrow Wall of Waveguide edge lengths are b, trapezoidal waveguide ridge and rectangle loudspeaker
The inwall spacing of shell is c, and trapezoidal waveguide ridge is d with the spacing of coaxial connector, and the width of trapezoidal waveguide ridge is e；
In equivalent circuit when the cross section of ridge waveguide and its TE10 ripples end, C is discontinuity capacitance, depending on b ', no
Continuity will produce higher mode；Two secondary parallel lines are suppose there is, its electrical length is θ1、θ2, characteristic impedance is Z01、Z02；
Equivalent network input voltage is taken for Uin, input current is Iin, there is equivalent circuit to understand：
Cut-off condition is：
Can now obtain：
Transcendental equation on λ c is somebody's turn to do by Matlab programs solution and solves λ c；
The equiva lent impedance of rectangular waveguide is：
Wherein λ c=2a, ridge waveguide is regarded as the rectangular waveguide of broadside shrinkage, and the equiva lent impedance of ridge waveguide can be write as class
As form：
a1It is the equivalent broadside of ridge waveguide, λ c=2a1＞ 2a are the cutoff wavelength of ridge waveguide, as can be seen from the above equation, ridge ripple
The effective impedance led is conducive to and is coaxially matched than regular waveguide relative reduction.
The beneficial effects of the invention are as follows：Broadband best match can be realized and covering requirement in angle wide can be met, by theory
Calculate and optimization Simulation, broadband and wide wave beam ridged horn excellent performance, in the frequency band range of a nearly octave, be input into standing wave
VSWR is less than 1.5, and directional diagram disclosure satisfy that antenna scanning needs.
Brief description of the drawings
Fig. 1 is end feedback broadband and wide wave beam ridged horn structural representation；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is end feedback broadband and wide wave beam ridged horn emulation S parameter figure；
Fig. 4 is end feedback broadband and wide wave beam ridged horn emulation E faces directional diagram；
Fig. 5 is end feedback broadband and wide wave beam ridged horn emulation H faces directional diagram；
Fig. 6 is the cross-sectional view of single ridged waveguides；
Fig. 7 is equivalent circuit diagram when single ridged waveguides TE10 ripples end；
In figure, 1- rectangular horn shells, 2- trapezoidal waveguide ridges, 3- coaxial connectors.
Specific embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
Using the less feature of ridge waveguide structure size, the bore of waveguide is adjusted, and change trapezoidal waveguide ridge and rectangle loudspeaker
The inwall spacing of shell is c, so that it may which while waveguide dimensions is met structural requirement, resonance is in required working frequency；Again
Adjustment trapezoidal waveguide ridge is d with the spacing of coaxial connector 3, you can reactive component of the allotment loudspeaker in resonance, to realize loudspeaker
Impedance matching in working band；Finally ridge transformation formula waveguide-coax transition is exported using end face to realize coaxial line
Matching between the Ω of sending-end impedance 50 and the Ω of output end free space wave impedance 377.In simulation calculation, using collaboration match party
Method takes into account ridge waveguide resonance, reduces reactive component and Waveguide coaxial conversion.
As depicted in figs. 1 and 2, a kind of end feedback broadband and wide wave beam ridged horn, including rectangular horn shell 1, trapezoidal waveguide ridge 2
With coaxial connector 3, trapezoidal waveguide ridge 2 be arranged on the inwall of rectangular horn shell 1 and with rectangular horn shell 1, coaxial connect
Connect device 3 to be fixedly connected, rectangular horn shell 1 collectively constitutes ridge waveguide structure with trapezoidal waveguide ridge 2.
The waveguide broadside length of rectangular horn shell 1 is a, and Narrow Wall of Waveguide edge lengths are b, trapezoidal waveguide ridge 2 and rectangular horn
The inwall spacing of shell 1 is c, and trapezoidal waveguide ridge 2 is d with the spacing of coaxial connector 3, and the width of trapezoidal waveguide ridge 2 is e；This
A little parameters are optimized using collaboration matching process, can obtain preferable result.
By continuing to optimize ridged horn items structural parameters, ideal performance parameter has been finally given.Close to one
Input standing wave VSWR is less than 1.5 in the frequency band range of individual octave, as shown in figure 3, element pattern disclosure satisfy that antenna scanning
Need.
According to technical requirements, the beam angle of radiating element should meet E faces beam angle more than 90 °, and H faces beam angle is big
In 70 °, by holding feedback broadband and wide wave beam ridged horn optimization design, as shown in Figure 4,5, E faces beam angle is about for emulation directional diagram
112.5 °, about 75 ° of H faces beam angle fully meets technical requirements.
According to technical requirements, radiative unit structure size should meet width less than 56mm, highly less than 68mm, by engineering
Calculations incorporated simulation optimization, ridged horn physical dimension is width 48mm, height 66mm, depth 46mm, is carried out using punching press form
Batch machining and manufacture, impedance transformation part use machining mode, by well-designed achievable low cost, small volume,
The features such as lightweight, uniformity is good.
Ridge waveguide transmission characteristic theory analysis is as described below：
Technical requirements need to be less than 56mm in horizontal width size (i.e. E faces), and vertical height size (i.e. H faces) is less than
68mm, requirement can be met by computation rule rectangular waveguide E faces size, but H faces size can not realize completely (if a sides size compared with
Small then extremely difficult impedance matching, and H faces beam angle also can be narrower), thus can only using different in nature waveguide be ridge waveguide form
Electrical property and physical dimension requirement can be met.Now ridge waveguide is analyzed as follows：
Ridge waveguide is also called ridge waveguide, and it is a kind of version of rectangular waveguide, is divided into single ridged waveguides and double ridge ripples
Lead two kinds of structure types.Compared with regular rectangular shape waveguide, with low main mould cut-off frequency, broadband, size is small and Low ESR is special
The features such as property, it is suitable as the feed waveguide of all channel antenna.
Ridge waveguide is similar to the situation of regular rectangular shape waveguide, it is also possible to transmit TE ripples and TM ripples, and its main mould is also
TE10 ripples.Additionally, double ridged waveguide can be regarded as be made up of single ridged waveguides and its mirror image, thus it have for TEm0 ripples it is identical
Cut-off frequency and cutoff wavelength.It is equivalent when the cross section and its TE10 ripples that single ridged waveguides is shown in Fig. 6, Fig. 7 are ended
Circuit.In figure, C is discontinuity capacitance, and depending on b ', discontinuity will produce higher mode.Two secondary parallel lines are suppose there is, its electricity is long
It is θ to spend1、θ2, characteristic impedance is Z01、Z02。
Equivalent network input voltage is taken for Uin, input current is Iin, there is equivalent circuit to understand：
Cut-off condition is：
Can now obtain：
Transcendental equation on λ c is somebody's turn to do by Matlab programs solution and solves λ c；
The equiva lent impedance of rectangular waveguide is：
Wherein λ c=2a, ridge waveguide is regarded as the rectangular waveguide of broadside shrinkage, and the equiva lent impedance of ridge waveguide can be write as class
As form：
a1It is the equivalent broadside of ridge waveguide, λ c=2a1＞ 2a are the cutoff wavelength of ridge waveguide, as can be seen from the above equation, ridge ripple
The effective impedance led is conducive to and is coaxially matched than regular waveguide relative reduction.
It is main in ridged horn to use standard coaxial waveguide mapped structure, can be realized by coaxial line to ridge by impedance matching
Loudspeaker carry out good transmission.
The above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form, is not to be taken as the exclusion to other embodiment, and can be used for various other combinations, modification and environment, and can be at this
In the text contemplated scope, it is modified by the technology or knowledge of above-mentioned teaching or association area.And those skilled in the art are entered
Capable change and change does not depart from the spirit and scope of the present invention, then all should be in the protection domain of appended claims of the present invention
It is interior.
Claims (1)
1. broadband and wide wave beam ridged horn is presented at a kind of end, it is characterised in that：Including rectangular horn shell (1), trapezoidal waveguide ridge (2) and
Coaxial connector (3), trapezoidal waveguide ridge (2) be arranged on the inwall of rectangular horn shell (1) and with rectangular horn shell (1),
Coaxial connector (3) is fixedly connected, and rectangular horn shell (1) collectively constitutes ridge waveguide structure with trapezoidal waveguide ridge (2)；
The waveguide broadside length of the rectangular horn shell (1) is a, and Narrow Wall of Waveguide edge lengths are b, trapezoidal waveguide ridge (2) and rectangle
The inwall spacing of horn bulb (1) is c, and trapezoidal waveguide ridge (2) is d, trapezoidal waveguide ridge (2) with the spacing of coaxial connector (3)
Width be e；
In equivalent circuit when the cross section of ridge waveguide and its TE10 ripples end, C is discontinuity capacitance, depending on b ', discontinuously
Property will produce higher mode；Two secondary parallel lines are suppose there is, its electrical length is θ1、θ2, characteristic impedance is Z01、Z02；
Equivalent network input voltage is taken for Uin, input current is Iin, from equivalent circuit：
Cut-off condition is：
Can now obtain：
Should be on λ by Matlab programs solutioncTranscendental equation solve λc；
The equiva lent impedance of rectangular waveguide is：
Wherein λc=2a, ridge waveguide is regarded as the rectangular waveguide of broadside shrinkage, and the equiva lent impedance of ridge waveguide can be write as similar shape
Formula：
a1It is the equivalent broadside of ridge waveguide, λc=2a1＞ 2a are the cutoff wavelength of ridge waveguide, as can be seen from the above equation, ridge waveguide
Effective impedance is conducive to and is coaxially matched than regular waveguide relative reduction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410675157.4A CN104332712B (en) | 2014-11-22 | 2014-11-22 | Present broadband and wide wave beam ridged horn in a kind of end |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410675157.4A CN104332712B (en) | 2014-11-22 | 2014-11-22 | Present broadband and wide wave beam ridged horn in a kind of end |
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| CN104332712A CN104332712A (en) | 2015-02-04 |
| CN104332712B true CN104332712B (en) | 2017-06-06 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428796A (en) * | 2015-12-29 | 2016-03-23 | 东南大学 | Compact broadband waveguide array element antenna |
| CN109599660A (en) * | 2018-11-23 | 2019-04-09 | 安徽四创电子股份有限公司 | A kind of phased array element of open ended waveguide |
| CN110703213B (en) * | 2019-10-09 | 2021-12-21 | 中国舰船研究设计中心 | Radar interference environment equivalent physical simulation method and device |
| CN111610378B (en) * | 2020-05-27 | 2023-05-16 | 赵鲁豫 | Millimeter wave dual-polarized near field measurement probe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6970139B1 (en) * | 2004-06-21 | 2005-11-29 | The United States Of America As Represented By The Secretary Of The Navy | Short resonant ridge waveguide load under radiation slot |
| CN101593872A (en) * | 2009-07-01 | 2009-12-02 | 电子科技大学 | A kind of back-fed millimeter wave broadband double ridged horn antenna |
| CN201503918U (en) * | 2009-09-25 | 2010-06-09 | 中国电子科技集团公司第十四研究所 | Horn antenna with constant wave-beam |
| CN102931491A (en) * | 2012-11-13 | 2013-02-13 | 北京航空航天大学 | Antenna unit loaded by broadband medium |
| CN103457033A (en) * | 2013-08-27 | 2013-12-18 | 上海交通大学 | Compact broadband circular polarizer |
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2014
- 2014-11-22 CN CN201410675157.4A patent/CN104332712B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6970139B1 (en) * | 2004-06-21 | 2005-11-29 | The United States Of America As Represented By The Secretary Of The Navy | Short resonant ridge waveguide load under radiation slot |
| CN101593872A (en) * | 2009-07-01 | 2009-12-02 | 电子科技大学 | A kind of back-fed millimeter wave broadband double ridged horn antenna |
| CN201503918U (en) * | 2009-09-25 | 2010-06-09 | 中国电子科技集团公司第十四研究所 | Horn antenna with constant wave-beam |
| CN102931491A (en) * | 2012-11-13 | 2013-02-13 | 北京航空航天大学 | Antenna unit loaded by broadband medium |
| CN103457033A (en) * | 2013-08-27 | 2013-12-18 | 上海交通大学 | Compact broadband circular polarizer |
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