CN104037504A - Trumpet type low-profile broadband high-gain antenna - Google Patents
Trumpet type low-profile broadband high-gain antenna Download PDFInfo
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- CN104037504A CN104037504A CN201410263509.5A CN201410263509A CN104037504A CN 104037504 A CN104037504 A CN 104037504A CN 201410263509 A CN201410263509 A CN 201410263509A CN 104037504 A CN104037504 A CN 104037504A
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Abstract
A trumpet type low-profile broadband high-gain antenna comprises a metal base plate, a metal side plate, a feed waveguide, a bracket, a top-layer dielectric slab, and a base-layer dielectric slab, wherein the bottom edge of the metal side plate is connected with a peripheral edge of the metal base plate to form a trumpet shape, the top-layer dielectric slab and the base-layer dielectric slab are supported by the bracket to be fixed above the metal base plate, the top-layer dielectric slab is formed by a single layer or by stacking at least two layers of dielectric slabs in a non-space mode, the base-layer dielectric slab is also formed by a single layer or by stacking at least two layers of dielectric slabs in a non-space mode, and a feed gap opening with a certain size is formed in the middle of the metal base plate and directly faces the base surface of the base-layer dielectric slab. According to the trumpet type low-profile broadband high-gain antenna, a Fabry-Perot resonator can be resonant in a wide frequency band, and the trumpet type low-profile broadband high-gain antenna has the advantages of high gain, wide frequency band, small size, simple structure, convenient debugging, low costs, high application values and high promotional values.
Description
Technical field
The invention belongs to antenna works technical field, relate to a kind of low section wide band high-gain antenna of novelty, be applied in the microwave/millimeter wave section communication equipments such as mobile communication, satellite communication, radar.
Background technology
The fast development of the technology such as Modern wireless communication, radar and electronic countermeasures, and electronic equipment is for the requirements at the higher level of antenna performance; Miniaturization, low section, broadband, high-gain and to be easy to integrated be the main feature of modern antenna design.Fabry-Perot cavity antenna has the advantages such as high-gain, Sidelobe, volume are little, easy processing, compared with equal performance microstrip antenna array, avoid the complicated feed network of designing antenna battle array, on design high-gain low profile antenna, be subject to gradually extensive concern, it,, than traditional high-gain aerial (as reflector antenna and array antenna etc.), has certain advantage.
Alexopoulos and Jackson equal to propose for 1984 certain altitude on miniature antenna and load overlay, can significantly improve the directivity of miniature antenna; So they are placed on printed antenna overlapping the multilayer dielectricity plate of high-k and magnetic permeability, improve gain with this; 1999, Trevenot etc. as reflective patch, improved the gain of antenna using a kind of two-dimensional medium drilling hole type electro-magnetic bandgap (EBG-electromagnetic band gap) structure, and can well suppress the generation of surface wave; Along with the broad research of EBG structure, make the Fabry-Perot resonant antenna of broadband, multiband, Miniaturization high-gain obtain development faster.
Make a general survey of domestic market, the product finding of Fabry-Perot resonant antenna is few, does not have more ripe antenna product of the same type.In addition, traditional cavity antenna, when prescribing a time limit in operating frequency, can, because leaky wave signal occurs reverse-phase at cavity upper surface, leaky wave phase place be inversely added in antenna normal orientation, so reduce the gain of antenna, minor level raises, and depression appears in main lobe upper end.
Summary of the invention
The low section wide band high-gain of the trumpet type antenna that main purpose of the present invention has been to provide a kind of low section, broadband, high-gain and has easily assembled, belongs to Fabry-Perot cavity antenna, for wireless communication system or the satellite communication of microwave and millimeter wave.
The present invention adopts following technical scheme:
The low section wide band high-gain of a kind of trumpet type antenna, is characterized in that: include metal base plate, metal side plate, feed waveguide, support, top layer dielectric-slab and bottom dielectric-slab; This metal side plate base be connected with metal base plate neighboring form horn-like; This top layer dielectric-slab and bottom dielectric-slab are fixed on metal base plate top by bracket supports, this top layer dielectric-slab be individual layer form or at least two layer medium plate continuously form apart from stack, this bottom dielectric-slab also for individual layer forms or at least two layer medium plate continuously apart from stack formation; In the middle of this metal base plate, also have a certain size feed gaps mouth, the just bottom surface to bottom dielectric-slab of this feed gaps mouth.
Preferably, described top layer dielectric-slab bottom surface is less than the quarter-wave of lowest operating frequency apart from the apical side height of bottom dielectric-slab, between this top layer dielectric-slab and bottom dielectric-slab, be filled with air or foamed material.
Preferably, described metal base plate is circular and forms circular horn structure to increase the gain of antenna with metal side plate.
Preferably, described metal base plate is rectangle and forms rectangular horn structure to increase the gain of antenna with metal side plate.
Preferably, the spacing of the dull and stereotyped end face of described bottom dielectric-slab bottom surface and metallic reflection is less than 1/2nd wavelength of lowest operating frequency, between described metal base plate end face and bottom dielectric-slab bottom surface, is filled with air or foamed material.
Preferably, the trumpet-shaped height that described metal base plate and metal side plate form, and top layer dielectric-slab upper surface is apart from the distance of metal base plate, is the 1-1.5 of lowest operating frequency wavelength doubly.
Preferably, the size of described top layer dielectric-slab is equal to or greater than bottom dielectric-slab size; The diameter of top layer dielectric-slab and bottom dielectric-slab or the length of side are 1.3-2.0 times of lowest operating frequency wavelength.
Preferably, also include feed waveguide, this feed waveguide is coupled to antenna feed by described feed gaps mouth, and this feed gaps mouth is provided with metallic membrane to carry out impedance matching.
Preferably, the feed at described feed gaps mouth place can substitute by microband paste miniature antenna or L-type monopole miniature antenna.
Preferably, described support comprises two intercell connectors and four feets, this two intercell connector is individually fixed in described top layer dielectric-slab periphery and bottom dielectric-slab periphery, between this two intercell connector, be also provided with connecting plate, these four feet one end are fixedly connected with intercell connector, and the other end is fixed on described metal base plate and the (PLSCONFM or supplementary of metal side plate junction.
From the above-mentioned description of this invention, compared with prior art, the present invention has following beneficial effect:
The present invention is based on the principle of Fabry-Perot resonator, design the low section wide band high-gain antenna that can be applicable to microwave and millimeter wave wave band, bandwidth range reaches more than 40%, and in band, gain is 19-23dBi.The present invention is by reducing the size of top layer dielectric-slab and bottom dielectric-slab, the diameter of dielectric-slab or the length of side are about 1.3-2 lowest operating frequency wavelength, to reduce such antenna after frequency raises, the phenomenon of the reverse-phase stack that leaky wave phase place occurs in normal orientation, improve the main lobe depression occurring because of reverse-phase, the situation that gain reduces, when making the further Bandwidth of antenna energy, maintains gain steadily constant in certain scope.
The present invention meet modern antennas size little, simple in structure, be easy to adjustment and installation, stable performance, be easy to the requirement of Integration Design, there is good market application foreground.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of Double Circle layer circular horn molded breadth band high-gain aerial of the present invention;
Fig. 2 is the overall structure end view of Double Circle layer circular horn molded breadth band high-gain aerial of the present invention;
Fig. 3 is trumpet type metal base plate in Double Circle layer circular horn molded breadth band high-gain aerial of the present invention and the vertical view of metal side plate;
Fig. 4 is Double Circle layer circular horn molded breadth band high-gain aerial medium-height trestle upward view of the present invention;
Fig. 5 is double square layer circular horn molded breadth band high-gain aerial three-dimensional structure diagram of the present invention;
Fig. 6 is Double Circle layer rectangular horn molded breadth band high-gain aerial three-dimensional structure diagram of the present invention;
Fig. 7 is double square layer rectangular horn molded breadth band high-gain aerial three-dimensional structure diagram of the present invention;
Fig. 8 is the reflection coefficient schematic diagram of Double Circle layer circular horn molded breadth band high-gain aerial Case Simulation of the present invention;
Fig. 9 is the gain schematic diagram of Double Circle layer circular horn molded breadth band high-gain aerial Case Simulation of the present invention;
Figure 10 is the 30GHz, the 35GHz that obtain of Double Circle layer circular horn molded breadth band high-gain aerial Case Simulation of the present invention, the E face directional diagram of 40GHz, 44GHz;
Wherein: 1 is metal side plate, 2 is support, and 3 is feed gaps mouth, and 4 is top layer dielectric-slab, and 5 is the first bottom dielectric-slab, and 6 is the second bottom dielectric-slab, and 7 is feed waveguide, and 8 is metal base plate.
Embodiment
Below by embodiment, the invention will be further described.
With reference to accompanying drawing 1 to Fig. 7, the low section wide band high-gain of a kind of trumpet type of the present invention antenna, its structure is similar to parabolic reflector surface antenna, comprising: metal side plate 1, metal base plate 8, support 2, feed gaps mouth 3, feed waveguide 7, top layer dielectric-slab 4 and bottom dielectric-slab.This metal side plate 1 base be connected with metal base plate 8 neighborings form horn-like.This top layer dielectric-slab 4 and bottom dielectric-slab are fixed on metal base plate 8 tops by support 2 supportings, support 2 comprises two intercell connectors and four feets for metallic support, this two intercell connector is individually fixed in top layer dielectric-slab 4 peripheries and bottom dielectric-slab periphery, between this two intercell connector, be also provided with connecting plate, these four feet one end are fixedly connected with intercell connector, and the other end is fixed on described metal base plate 8 and metal side plate 1 junction.In the middle of metal base plate 8, also have a certain size feed gaps mouth 3, the just bottom surface to bottom dielectric-slab of this feed gaps mouth 3.This feed waveguide 7 is coupled to antenna feed by feed gaps mouth 3, and this feed gaps mouth 3 is provided with metallic membrane to carry out impedance matching.The feed at feed gaps mouth 3 places also can substitute by microband paste miniature antenna or L-type monopole miniature antenna.
This top layer dielectric-slab 4 for individual layer form or at least two layer medium plate continuously apart from stack form, this bottom dielectric-slab also for individual layer forms or at least two layer medium plate continuously form apart from stack, and dielectric constant between top layer dielectric-slab 4 and the bottom dielectric-slab that is made up of multiple dielectric-slabs can be identical or different.For the top layer dielectric-slab 4 being continuously made up of apart from stack multilayer dielectricity plate, its multilayer dielectricity plate is same size; For the bottom dielectric-slab continuously being formed apart from stack by multilayer dielectricity plate, its multilayer dielectricity plate is also same size, and the size of top layer dielectric-slab 4 is equal to or greater than bottom dielectric-slab size, the diameter of top layer dielectric-slab 4 and bottom dielectric-slab or the length of side are 1.3-2.0 times of lowest operating frequency wavelength, so can further expand the bandwidth of operation of Fabry-Perot cavity antenna.In addition, top layer dielectric-slab 4 bottom surfaces are less than the quarter-wave of lowest operating frequency apart from the apical side height of bottom dielectric-slab, between this top layer dielectric-slab 4 and bottom dielectric-slab, are filled with air or foamed material.
Metal base plate 8 can be circle or rectangle, and forms circular horn structure or square horn structure to increase the gain of antenna with metal side plate 1.In addition, the spacing of the dull and stereotyped end face of bottom dielectric-slab bottom surface and metallic reflection is less than 1/2nd wavelength of lowest operating frequency, between metal base plate 8 end faces and bottom dielectric-slab bottom surface, is filled with air or foamed material.The trumpet-shaped height that metal base plate 8 and metal side plate 1 form, and top layer dielectric-slab 4 upper surfaces are apart from the distance of metal base plate 8, are the 1-1.5 of lowest operating frequency wavelength doubly.The radius of metal base plate, in the time of 1.5-2 lowest operating frequency wavelength, can make antenna gain reach optimum efficiency.
With reference to Fig. 2, be specific embodiments of the invention one, for Double Circle layer circular horn molded breadth band high-gain aerial is that metal base plate 8, top layer dielectric-slab 4 and bottom dielectric-slab are circle.Its antenna total height H=11.5mm (being about 1.15 λ of lowest operating frequency 30GHz), wherein top layer dielectric-slab 4 bottom surfaces are h4=10.045mm (approximately 1 λ) apart from the height of metal base plate 8, diameter value is R1=19mm, that dielectric-slab adopts is ARLONAD1000L05055, dielectric constant is 10.2-10.5, and thickness (h3) is 1.27mm; Air distance h 2=2.6mm between top layer dielectric-slab 4 and bottom dielectric-slab 5.Bottom dielectric-slab is made up of without pitch stacking two layer medium plate, comprise the first bottom dielectric-slab 5 and the second bottom dielectric-slab 6, what adopt is respectively that (dielectric constant is 2.94 to ARLON CLTE-XT04011, thickness is 1.04mm) and ARLONAD1000L02511 (dielectric constant is 10.2-10.5, thickness is 0.635mm), wherein the first bottom dielectric-slab 5 adopts ARLON CLTE-XT04011 upper, the second bottom dielectric-slab 6 adopt AD1000L02511 under, this two bottoms dielectric-slab diameter R2 is 13.5mm.The second 6 of bottom dielectric-slabs with first bottom dielectric-slab 5 is seamless be close to together with, the second bottom dielectric-slab 6 bottom surfaces are apart from metal base plate 8 height h1=4.6mm, the size of the second bottom dielectric-slab 6 is consistent with the first bottom dielectric-slab 5.
Fig. 3 is the trumpet type metal base plate 8 of Fig. 2 embodiment and the vertical view of metal sidepiece, and middle feed gaps mouth 3 is long is Ld=4mm, and wide is Wd=2mm.The diameter Rs=28mm of circular metal base plate 8, the outer circle diameter diameter that metal side plate 1 upper end surrounds is R=47.4mm.Feed waveguide 7 adopts standard WG28 rectangular waveguide, and waveguide internal diameter is 7.112mm × 3.556mm.Feeding classification also can be used the replacement such as paster antenna and electronically small antenna of same effect.Fig. 4 has intuitively shown the overall structure of metallic support.
Dielectric-slab that the Fabry-Perot cavity antenna the present invention relates to is suspended by multilayer, the reflecting plate and the feed waveguide 7 that are made up of circle or rectangular horn type metal base plate 8 and metal side plate 1 form.According to the principle of Fabry-Perot resonator, by suitably choosing height and the medium parameter of the dielectric-slab that suspends, when feed waveguide 7 is by the feed gaps mouth 3 on metal base plate 8 during to antenna feed, can make the reflected phase will of bottom dielectric-slab increase with the rising of particular job frequency, make resonator in required wider frequency section, to produce resonance or in resonance condition; When feed waveguide 7 during to antenna feed, just can make antenna produce high-gain by the feed gaps mouth 3 of metal base plate 8 in wider frequency range.
The bandwidth of operation of millimeter wave broadband high-gain aerial example provided by the invention is 30-45GHz at S11<-10dB, and relative bandwidth reaches 40%, gain 19-23dBi in band.Concrete principle is as follows: feed waveguide 7 is by the feed gaps mouth 3 coupled radiation electromagnetic waves of metal base plate 8, in the resonant cavity that electromagnetic wave forms between top layer dielectric-slab 4 and bottom dielectric-slab 5 and metal base plate 8 through multiple reflections and transmission, energy from regard to top layer dielectric-slab 4 upper surface resonant cavity cavity outer openings to space radiation.So, the leaky wave signal of top layer dielectric-slab in working frequency range 4 surface transmission with superimposed, forms high-gain in the normal orientation of antenna; And the metal side plate 1 that forms trumpet type further concentrates on antenna normal orientation the reflection of electromagnetic wave of resonant cavity outer opening radiation, increase the gain of antenna.
The present invention is by reducing the size of top layer dielectric-slab 4 and bottom dielectric-slab, the diameter of two-layer dielectric-slab or the length of side are made as and are about 1.3-2 wavelength, to reduce such antenna after frequency raises, the phenomenon of the reverse-phase stack that leaky wave phase place occurs in normal orientation, improve the main lobe depression occurring because of reverse-phase, the situation that gain reduces, when making the further Bandwidth of antenna energy, maintains gain steadily constant in certain scope.Further add metal side plate 1, make former Fabry-Perot resonant antenna gain improve about 3dB.
Fig. 8 is the emulation reflection coefficient curve that the present invention is directed to Fig. 2 embodiment, can observe antenna of the present invention at frequency 30GHz-45GHz scope reflection coefficient S
11all maintain under be less than-10dB, relative bandwidth is greater than 40%, realizes the wide feature of antenna working band.
Fig. 9 is the simulated gain curve that the present invention is directed to Fig. 2 antenna, and within the scope of working frequency range, the gain of antenna is 20-23dBi.
Figure 10 the present invention is directed to Fig. 2 embodiment antenna at the E of 30GHz, 35GHz and 40GHz face directional diagram, and observable goes out antenna directional diagram in operating frequency range and is substantially consistent.
Fig. 5 to Fig. 6 is respectively the antenna structure of other embodiment of the present invention, its primary structure is identical with Fig. 2 embodiment, also comprise the first bottom dielectric-slab 5 and the second bottom dielectric-slab 6, difference is that Fig. 5 is double square layer circular horn molded breadth band high-gain aerial (be that metal base plate 8 is circle, top layer dielectric-slab 4 and bottom dielectric-slab are rectangle); Fig. 6 is Double Circle layer rectangular horn molded breadth band high-gain aerial (top layer dielectric-slab 4 and bottom dielectric-slab is for circular, and metal base plate 8 is rectangle); Fig. 7 is double square layer rectangular horn molded breadth band high-gain aerial (metal base plate 8, top layer dielectric-slab 4 and bottom dielectric-slab are rectangle).
Although the top layer dielectric-slab 4 of antenna of the present invention or bottom dielectric-slab all can be made up of without pitch stacking the different dielectric-slab of single or multiple lift.But it is all to carry out based on the two-layer structure by the separated dielectric-slab of air that the present invention enumerates explanation and the example of antenna.It is emphasized that this does not form the restriction to antenna of the present invention.The similar antenna of individual layer or three layers of even more multi-layered dielectric-slab structure with air or foam interval of dielectric-slab, every layer of dielectric-slab can be made up of without pitch stacking the different dielectric-slab of single or multiple lift, same within the protection of the present patent application.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading protection range of the present invention.
Claims (10)
1. the low section wide band high-gain of a trumpet type antenna, is characterized in that: include metal base plate, metal side plate, feed waveguide, support, top layer dielectric-slab and bottom dielectric-slab; This metal side plate base be connected with metal base plate neighboring form horn-like; This top layer dielectric-slab and bottom dielectric-slab are fixed on metal base plate top by bracket supports, this top layer dielectric-slab be individual layer form or at least two layer medium plate continuously form apart from stack, this bottom dielectric-slab also for individual layer forms or at least two layer medium plate continuously apart from stack formation; In the middle of this metal base plate, also have a certain size feed gaps mouth, the just bottom surface to bottom dielectric-slab of this feed gaps mouth.
2. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, it is characterized in that: described top layer dielectric-slab bottom surface is less than the quarter-wave of lowest operating frequency apart from the apical side height of bottom dielectric-slab, between this top layer dielectric-slab and bottom dielectric-slab, be filled with air or foamed material.
3. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, is characterized in that: described metal base plate is circular and forms circular horn structure to increase the gain of antenna with metal side plate.
4. the low section wide band high-gain of a kind of trumpet type as claimed in claim 1 antenna, is characterized in that: described metal base plate is rectangle and forms rectangular horn structure to increase the gain of antenna with metal side plate.
5. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, it is characterized in that: the spacing of the dull and stereotyped end face of described bottom dielectric-slab bottom surface and metallic reflection is less than 1/2nd wavelength of lowest operating frequency, between described metal base plate end face and bottom dielectric-slab bottom surface, is filled with air or foamed material.
6. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, it is characterized in that: the trumpet-shaped height that described metal base plate and metal side plate form, and top layer dielectric-slab upper surface is apart from the distance of metal base plate, is the 1-1.5 of lowest operating frequency wavelength doubly.
7. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, is characterized in that: the size of described top layer dielectric-slab is equal to or greater than bottom dielectric-slab size; The diameter of top layer dielectric-slab and bottom dielectric-slab or the length of side are 1.3-2.0 times of lowest operating frequency wavelength.
8. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, it is characterized in that: also include feed waveguide, this feed waveguide is coupled to antenna feed by described feed gaps mouth, and this feed gaps mouth is provided with metallic membrane to carry out impedance matching.
9. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, is characterized in that: the feed at described feed gaps mouth place can substitute by microband paste miniature antenna or L-type monopole miniature antenna.
10. the low section wide band high-gain of a kind of trumpet type according to claim 1 antenna, it is characterized in that: described support comprises two intercell connectors and four feets, this two intercell connector is individually fixed in described top layer dielectric-slab periphery and bottom dielectric-slab periphery, between this two intercell connector, be also provided with connecting plate, these four feet one end are fixedly connected with intercell connector, and the other end is fixed on described metal base plate and metal side plate junction.
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| CN201410263509.5A CN104037504B (en) | 2014-06-13 | 2014-06-13 | A kind of trumpet type low section wide band high-gain antenna |
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| CN201410263509.5A CN104037504B (en) | 2014-06-13 | 2014-06-13 | A kind of trumpet type low section wide band high-gain antenna |
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| CN104037504B CN104037504B (en) | 2016-08-24 |
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Cited By (6)
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| CN104499443A (en) * | 2014-12-25 | 2015-04-08 | 广西米付网络技术有限公司 | Bluetooth directional and distance communication based subway turnstile system and control method thereof |
| CN106410379A (en) * | 2015-08-03 | 2017-02-15 | 香港城市大学 | Antenna |
| CN109659675A (en) * | 2017-09-20 | 2019-04-19 | Pc-Tel公司 | Double frequency band aerial |
| CN110676562A (en) * | 2019-09-27 | 2020-01-10 | 广州吉欧电子科技有限公司 | Choking type GNSS satellite antenna |
| CN112751176A (en) * | 2020-12-29 | 2021-05-04 | 中国航空工业集团公司西安飞机设计研究所 | Airborne low-frequency low-height broadband omnidirectional antenna |
| CN113300094A (en) * | 2021-06-29 | 2021-08-24 | 深圳金信诺高新技术股份有限公司 | Waveguide antenna unit and waveguide array antenna |
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| CN113300094A (en) * | 2021-06-29 | 2021-08-24 | 深圳金信诺高新技术股份有限公司 | Waveguide antenna unit and waveguide array antenna |
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|---|---|
| CN104037504B (en) | 2016-08-24 |
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