CN101013772B - Low-frequency ultra-wideband compact feed - Google Patents
Low-frequency ultra-wideband compact feed Download PDFInfo
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- CN101013772B CN101013772B CN2006101129640A CN200610112964A CN101013772B CN 101013772 B CN101013772 B CN 101013772B CN 2006101129640 A CN2006101129640 A CN 2006101129640A CN 200610112964 A CN200610112964 A CN 200610112964A CN 101013772 B CN101013772 B CN 101013772B
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Abstract
The invention relates to one low frequency super wide band contract field source, which comprises one butterfly antenna, feedback part, two side fix metal boards and back metal board, wherein, feedback source emission part relies on butterfly antenna and the feedback part is composed of SMA joint band wire and band tank wire structure by use of variable butterfly antenna wide band property and feedback part to realize whole feedback wide band property.
Description
Technical field
The present invention relates to a kind of ultra-wideband compact feed, both can be used for reception and also can be used for emitting radio wave.Be mainly used in and tighten a test, can be used as a deflation dead zone on the one hand and detect feed, be used for common antenna and rcs measurement on the one hand.In addition, this feed also can be used as the terminal antenna of ultra-broadband radio equipment such as electronic reconnaissance, electronic jamming and ground penetrating radar and the antenna for base station of ultra-wideband communications.
Background technology
Compact feed is with the generation of tightening field technology and develop closely related, tightening is to be used for the far-field characteristic of test target, as antenna pattern, and the RCS of target etc., tightening the field is good indoor test place, and each advanced country all spares no high price to greatly develop.A performance that tightens determines to a great extent and the performance of compact feed that will have high performance deflations a field test macro at first must have high performance compact feed.Tightening a major requirement to feed is that E face H is in the face of claiming; And in the illumination angle in corresponding dead zone, directional diagram is very level and smooth, and taper is as much as possible little; Lower standing-wave ratio; Very low cross polarization; Stable phase center; The wide frequency band of trying one's best.
What compact feed employing both at home and abroad was more at present is corrugated horn, corrugated horn has a high-performance that meets a deflation requirement, but the high-performance of corrugated horn is to have utilized higher mode and the stack of main mould that groove has encouraged on the loudspeaker wall to form, since groove depth be fix be difficult to accomplish very wide frequency band, the corrugated horn bandwidth of general practical application in tightening is no more than 2: 1.In addition, when being applied to low frequency, to become very heavy according to the corrugated horn that amplifies than principle equal proportion that contracts, and be unfavorable for using in the actual measurement, the every increase of quality of feed a bit all is that the heavy burden of using scanning support is detected in the dead zone when particularly being applied in the detection of dead zone, deflation field.Adopt the butterfly antenna of ultra broadband in the 0.4-3GHz scope, then can avoid adopting in actual applications several heavy corrugated horns.
Adopt the loudspeaker that mix of ridge ripple loudspeaker or ridge ripple loudspeaker and corrugated horn can widening frequency band, the external example that adopts is T-slot (ring-loaded) corrugated horn that MAAS (microwave and antenna systems) company designs 8-18Ghz, adopt the structure of coaxial feed-two ridge-corrugated horns, utilize two ridge broadening antenna frequency bands, utilize corrugated horn to realize the requirement of entire antenna directional diagram.The said firm has also designed four ridged horns (quad-ridged horn) that are used for pulse reflecting surface feed, its actinal surface size is 1/4 of a low-limit frequency corresponding wavelength, can in the 3 octaves ratio of low-limit frequency (highest frequency with), obtain electric property preferably, return loss has also been made the horn antenna of various function admirables respectively as compact feed less than-other merchant of antenna maker both domestic and external of 8dB. in 4 octaves, but no matter be which kind of loudspeaker, all exist volume bigger when being applied to low frequency, inconvenient problem is installed in the heavier use of quality.
Albert K.Y.Lai etc. has proposed a kind of Novel Ultra Wideband Antenna, this antenna has utilized the combination of ultra broadband bowtie-shaped antenna and line of rabbet joint circuit board antenna, the E face of controlling this ultra-wideband antenna respectively by the subtended angle and the plane angle of butterfly antenna and the main lobe beamwidth of H face.If being applied to low-frequency range, this ultra-wideband antenna has light weight, the characteristics of good electrical property, but the Y-Y transition barron structure that this antenna uses is very high to the requirement on machining accuracy of the line of rabbet joint and microstrip line, the width of the line of rabbet joint has only 0.035mm, and barron structure is very responsive to size especially Y-Y type blank area.The level and smooth butt joint of the wide line of rabbet joint of knot type antenna and 0.035mm also has very big difficulty in addition, and this antenna applications during to low-frequency range the electricity size still seem excessive.
Therefore, realize that low-frequency ultra-wideband compact is little with the volume of feed, light weight, low cost, high-performance are highly significant.
Summary of the invention
The present invention proposes a kind of novel low-frequency ultra-wideband compact feed, it is little that this feed has a volume, light weight, and low cost, high performance outstanding advantage, and satisfy fully and tighten an every requirement to feed.This antenna has very wide impedance bandwidth in addition, can be used for the field that other needs the ultra broadband miniature antenna.
Design of the present invention is as follows: the present invention utilizes butterfly antenna to have the characteristics of ultra broadband, with the radiant section of butterfly antenna as antenna, utilize the feed part of the ultra broadband barron structure of strip line turn trough line, thereby make whole feed have the ultra broadband characteristic as butterfly antenna.Because the quality of butterfly antenna and feed structure is all low weight, therefore whole feed quality is also low weight.As long as butterfly antenna and current feed department branch are provided with the parameter that reasonable parameter just can reach whole feed requirement.
According to the design of foregoing invention, the present invention adopts following technical scheme:
Feed is used in the test of a kind of low-frequency ultra-wideband compact, comprises two medium substrates, two metallic plates that curve index shape, two side metallic plates, metallic plate after.Concrete structure is:
Be processed with the transition barron structure of strip line on two medium substrates to the line of rabbet joint, in this transition barron structure, the width of the line of rabbet joint is chosen at and makes the arbitrary value of line of rabbet joint characteristic impedance between 45 ohm to 50 ohm, the terminal of the line of rabbet joint is that a diameter is the circular recess of 20 times of line of rabbet joint width, this circular recess is as the open end of the line of rabbet joint, and the other end of the line of rabbet joint joins in the top of butterfly antenna; The width of strip line is chosen for and makes strip line is arbitrary value between 60 ohm to 75 ohm in the characteristic impedance of transition position, the terminal of strip line is a sector that diameter is round more bigger than the line of rabbet joint, the central angle of covering of the fan is 76 degree, and this sector is as the open end of band strip line.Utilize the transition of notion realization from the strip line to the line of rabbet joint of open circuit short circuit.
The radiant section that two metallic plates that curve index shape constitute feed is butterfly antenna just, they are welded on two blocks of dielectric-slabs, butterfly antenna is that trapezoidal planar metal plate curves index shape by expanded view, latter end circumflexion at exponential curve is realized exponential curve seamlessly transitting to side plate, when choosing suitable exponential line equation, can realize characteristic impedance be 50 ohm the line of rabbet joint to characteristic impedance be 377 ohm free space quick transition and don't produce bigger energy emission, find that through emulation and experiment back the exponential curve equation elects y=9.86*e as
0.01*x, can realize the quick transition of characteristic impedance preferably and not produce bigger reflection that this just reduces to provide condition greatly for antenna size at-9.36 o'clock.If the terminal at exponential curve directly is connected and will causes the secondary lobe and the back lobe of whole feed bigger with side plate, therefore adopt the circular arc transition, not obvious to the overall dimensions increase of antenna on the one hand, can effectively avoid the secondary lobe of feed and back lobe excessive again on the one hand.When the high ratio of the length and width of butterfly antenna was 4: 5: 4, whole feed can be realized E face and H face directional diagram symmetry.
The side plate of both sides is used for reinforcing the entire antenna structure and the handle of dismounting antenna is provided, and the aspect test is installed.The both sides metallic plate can be guided the electromagnetic wave of butterfly antenna terminal thereby the frequency band of further broadening entire antenna low-frequency range.
Back plate is used for installing sub-miniature A connector flange or N connector flange, and suppresses backward radiation to a certain extent.
The present invention's advantage compared with prior art:
1. will tighten a frequency of testing and be reduced to 0.4GHz with feed, originally tighten the field and generally be applied to the above test of 2GHz, corresponding in it feed frequency that matches generally also more than 2GHz, along with the development of tightening field technology, tighten a user and require constantly to reduce to tightening a lower side frequency of using, this feed provides prerequisite for tightening a reduction of using lower side frequency.
2. adopt the radiating principal of butterfly antenna as feed, a low-frequency range of testing in the deflation field (＜3GHz) size of whole feed has only 350 * 300 * 240mm
3, littler more than 5 times than amplifying the feed that obtains according to high band corrugated horn geometric ratio.Application in measurement is with very convenient.
3. entire antenna is because butterfly antenna and feed structure all have the characteristic of ultra broadband, so entire antenna has the ultra broadband characteristic, avoided in test process the replacing feed frequent along with the variation of frequency, improved the efficient of test.
4. the electrical property of this feed depends primarily on butterfly antenna and feed structure, further offside metallic plate and afterwards metallic plate loss of weight when being applied to tighten the scanning support of a dead-space characteristic check, the quality that makes whole feed is far smaller than the weight that is applied to the various horn feeds of this wave band less than 1kg.
5. the feed of this antenna part is changeed strip line again through the Ba Lun transition structure realization balanced feeding of strip line to the line of rabbet joint, in theory as long as the antenna machining accuracy reaches the E face of requirement antenna and the cross polarization of H face all is low-down by SMA.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is that butterfly antenna of the present invention launches schematic diagram.
Fig. 3 is a feed part schematic diagram of the present invention, and wherein figure (a) is that the top layer and the bottom schematic diagram (b) of feed part are the end view of feed part for feed part intermediate layer schematic diagram (c).
Fig. 4 is photo figure in kind of the present invention.
Embodiment
A preferred embodiment of the present invention: referring to Fig. 1.1 is butterfly antenna among the figure, and 2 is the butterfly antenna feed structure among the figure, and 3 is the metallic plate of both sides among the figure, and 4 is the back metallic plate among the figure.Whole compact feed is made up of this four part.
Butterfly antenna is curved by planar metal plate shown in Figure 2, and it is by parameter l
1, l
2, l
3, l
4, l
5Common decision, wherein l1 is the total length of butterfly antenna planar metal plate before the whole bending, and l2 is the arc transition segment length of exponential line to side plate, and l5 is the width of whole butterfly antenna.The butterfly antenna exponential part choose the radiance that is determining entire antenna, suitably must choose the electric size that the exponential curve equation can reduce antenna greatly, improve the radiance of whole feed, and make entire antenna have very wide impedance bandwidth.The equation that the bending exponential line is got in the optimization of process appropriate design is: y=9.86*e
0.01*x-9.36.
Referring to Fig. 3, Fig. 3 is the feed part of butterfly antenna.
This feed part is made of the ultra broadband barron structure of strip line turn trough line and the prolongation that prolongs for fixing butterfly antenna.1 is metal level among the figure, and 2 is dielectric layer.The structure of strip line is mainly determined by middle conductor, selected middle conductor width w1, making whole strip line characteristic impedance is 50 ohm, conductor width w2 is chosen to be and makes whole strip line characteristic impedance is 75 ohm, the terminal of strip line center conductor is that a diameter is 28mm, and central angle is the sector of 76 degree.It is 55 ohm that line of rabbet joint width w3 is chosen to be the characteristic impedance that makes the whole line of rabbet joint, and the terminal of the line of rabbet joint is that diameter is the line of rabbet joint circle of 20mm.For fixedly thereby the prolongation requirement of butterfly antenna and the conformal butterfly antenna that makes things convenient in side of butterfly antenna are welded on the whole feed structure.
Referring to Fig. 4, in-kind portion for whole feed, two side metallic plates are used for supporting whole feed structure and play the effect of broadening low frequency bandwidth, the backside metal plate is connected with the both sides metallic plate can reinforce the entire antenna structure, in addition, the backside metal plate can be installed the SMA flange, and in the backward radiation that suppresses entire antenna.
Claims (9)
1. ultra-wideband compact feed, bandwidth reaches 0.4-3GHz, comprising: the ultra broadband butterfly antenna of feed radiant section, be the ultra broadband barron structure of butterfly antenna feed, the metallic plate of both sides and back metallic plate is characterized in that:
What butterfly antenna E face adopted is that the certain index alignment curve opens, and adopts circle arc curve to open in the terminal of described exponential line deltoid, and the H face adopts straight line to open.
2. ultra-wideband compact feed as claimed in claim 1 is characterized in that: the ratio that the length and width of butterfly antenna are high is 4: 5: 4.
3. ultra-wideband compact feed as claimed in claim 1 is characterized in that: the radiator plane of butterfly antenna is the curved surface according to the gradual change of described certain index alignment curve, and curve's equation is y=9.86*e
0.01*x-9.36, x is described exponential line deltoid transverse axis in the equation, and y is the described exponential line deltoid longitudinal axis in the equation.
4. ultra-wideband compact feed as claimed in claim 1, it is characterized in that: the described transition barron structure that adopts strip line turn trough line for the ultra broadband barron structure of butterfly antenna feed, the width of the line of rabbet joint is chosen at and makes the arbitrary value of line of rabbet joint characteristic impedance between 45 ohm to 50 ohm, the terminal of the line of rabbet joint is that a diameter is the circular recess of 20 times of line of rabbet joint width, joins at the top of the other end in butterfly antenna; The width of strip line is chosen for and makes strip line is arbitrary value between 60 ohm to 75 ohm in the characteristic impedance of transition position, and the diameter of described circular recess is 20mm, and the terminal of strip line middle conductor is that a diameter is 28mm, and central angle is the sectors of 76 degree.
5. ultra-wideband compact feed as claimed in claim 1 is characterized in that: adopts the fixing described ultra broadband barron structure of metallic plate of both sides, makes the entire antenna Stability Analysis of Structures, and not yielding, and the bandwidth of broadening low-frequency range.
6. ultra-wideband compact feed as claimed in claim 1 is characterized in that: the metal of the metallic plate of the both sides of employing is selected from aluminium, iron, tin, copper, silver, gold, platinum, or the alloy of above-mentioned metal.
7. ultra-wideband compact feed as claimed in claim 1, it is characterized in that: adopt described back metallic plate to reinforce described butterfly antenna on the one hand, fixing described on the one hand is the ultra broadband barron structure of butterfly antenna feed, and this back metallic plate can reduce the backward radiation of antenna to a certain extent.
8. ultra-wideband compact feed as claimed in claim 1 is characterized in that: the metal that described back metallic plate adopts is selected from aluminium, iron, tin, copper, silver, gold, platinum, or the alloy of above-mentioned metal.
9. ultra-wideband compact feed as claimed in claim 1 is characterized in that described butterfly antenna adopts the metal manufacturing, and metal is selected from aluminium, iron, tin, copper, silver, gold, platinum, or the alloy of above-mentioned metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101129640A CN101013772B (en) | 2006-09-13 | 2006-09-13 | Low-frequency ultra-wideband compact feed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101129640A CN101013772B (en) | 2006-09-13 | 2006-09-13 | Low-frequency ultra-wideband compact feed |
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| CN101013772A CN101013772A (en) | 2007-08-08 |
| CN101013772B true CN101013772B (en) | 2011-09-07 |
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| CN2006101129640A Expired - Fee Related CN101013772B (en) | 2006-09-13 | 2006-09-13 | Low-frequency ultra-wideband compact feed |
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Families Citing this family (13)
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| CN101807743A (en) * | 2010-04-07 | 2010-08-18 | 西安交通大学 | Air coupling double-frequency-band pulse ground penetrating radar antenna |
| CN102590641B (en) * | 2012-02-21 | 2014-07-02 | 北京航空航天大学 | Shared holographic compact range system of millimeter wave/submillimeter wave multi-band calibers |
| CN103293394B (en) * | 2012-02-29 | 2017-04-05 | 深圳光启创新技术有限公司 | A kind of Compact range generation device |
| CN103293393B (en) * | 2012-02-29 | 2017-04-12 | 深圳光启创新技术有限公司 | Compact range generating device |
| CN103293395B (en) * | 2012-02-29 | 2017-04-12 | 深圳光启创新技术有限公司 | Compact range generating device |
| CN103293392B (en) * | 2012-02-29 | 2017-04-05 | 深圳光启创新技术有限公司 | A kind of Compact range generation device |
| CN204130697U (en) * | 2014-09-10 | 2015-01-28 | 中兴通讯股份有限公司 | A kind of PCB antenna for wireless terminal |
| WO2017086855A1 (en) | 2015-11-17 | 2017-05-26 | Gapwaves Ab | A self-grounded surface mountable bowtie antenna arrangement, an antenna petal and a fabrication method |
| US10720709B2 (en) | 2015-11-17 | 2020-07-21 | Gapwaves Ab | Self-grounded surface mountable bowtie antenna arrangement, an antenna petal and a fabrication method |
| CN106299646B (en) * | 2016-08-23 | 2019-06-11 | 西安电子科技大学 | Based on fluting radar cross section low with the miniaturization of absorbing material broadband slotline antennas |
| CN107895840B (en) * | 2017-11-03 | 2018-09-18 | 西安科技大学 | A kind of paraboloid cone ultra-wideband antenna of edge feed |
| CN111463567B (en) * | 2020-04-15 | 2022-11-15 | 西安朗普达通信科技有限公司 | Low RCS ultra-wideband Vivaldi antenna based on differential evolution algorithm |
| CN114256607B (en) * | 2021-12-22 | 2022-12-13 | 电子科技大学 | High-power ultra-wideband electromagnetic radiation antenna |
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|---|---|---|---|---|
| EP1229605A1 (en) * | 2001-02-02 | 2002-08-07 | Intracom S.A. Hellenic Telecommunications & Electronics Industry | Wideband printed antenna system |
| CN1490894A (en) * | 2002-10-18 | 2004-04-21 | 李月章 | Ultra-high frequency plane digital butterfly antenna |
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2006
- 2006-09-13 CN CN2006101129640A patent/CN101013772B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1229605A1 (en) * | 2001-02-02 | 2002-08-07 | Intracom S.A. Hellenic Telecommunications & Electronics Industry | Wideband printed antenna system |
| CN1490894A (en) * | 2002-10-18 | 2004-04-21 | 李月章 | Ultra-high frequency plane digital butterfly antenna |
Non-Patent Citations (1)
| Title |
|---|
| 黄国臣.一种新型紧缩场低频馈源.《电子测量技术》.2006,第29卷(第4期),1-3. * |
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