CN1874066A - Microstrip antenna with open-ended resonance ring(SRRs) - Google Patents
Microstrip antenna with open-ended resonance ring(SRRs) Download PDFInfo
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- CN1874066A CN1874066A CN 200510042743 CN200510042743A CN1874066A CN 1874066 A CN1874066 A CN 1874066A CN 200510042743 CN200510042743 CN 200510042743 CN 200510042743 A CN200510042743 A CN 200510042743A CN 1874066 A CN1874066 A CN 1874066A
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Abstract
Metal open-ended resonant ring with effect of negative magnetic permeability in adopted in the disclosed new type microstrip antenna to improve performance of antenna. Comparing with general microstrip antenna, the disclosed microstrip antenna possesses features of wide frequency band, high gain, and simple structure. The said metal open-ended resonant ring is in nested structure between polygon and circular single ring or concentric double rings. Using technique of etching circuit board etches the said nested structure on base plate of microstrip antenna according to certain periodic arrangement mode. Effect of forbidden band of the metal open-ended resonant ring can restrain spurious radiation of surface wave excitated by antenna and feeding network so as to raise radiance of microstrip antenna.
Description
Technical field the present invention relates to a kind of novel microstrip antenna, and the metal openings resonant ring that relates in particular to a kind of employing and have the negative magnetoconductivity effect improves the microstrip antenna of antenna performance.
Background technology dielectric constant and magnetic permeability are the most basic two physical quantitys of describing electromagnetic field character in the homogeneous medium, and the material that occurring in nature exists all has positive magnetic permeability and dielectric constant.Can realize that since people such as Pendry in 1999 propose metal openings resonant ring (SplitRing Resonators) negative magnetic permeability, array of metal lines can realize negative permittivity, the research to this " two negative phenomenon " has at present become academic focus.Because the metal openings resonant ring has negative magnetic permeability in certain resonance band, form the forbidden band, and show some special responding microwave characteristics, thereby good application prospects will be arranged in fields such as microelectronic circuits element, filter, radio communication, hypersensitization transducer, diagnosis imagings.
Microstrip antenna is to paste the antenna that adds metal patch on the dielectric substrate that the conductor ground plate is arranged, and it utilizes microstrip line or coaxial feeding.Compare with common antenna, the volume of microstrip antenna is little, easily is shaped, and is easy of integration, simple in structure, is suitable for printing technology and produces in enormous quantities, has been widely used in satellite communication at present, aircraft, guided missile syntype antenna, various military civil areas such as probe.But the narrow gain of microstrip antenna working band is low, and directivity is poor, and conductor and dielectric loss are arranged, and radiation efficiency is low, more is difficult to obtain the application in a nearlyer step in the instrument and equipment of high-performance and sensitivity at needs.The technology of more existing raising microstrip antenna performances, for example increase substrate thickness or multiple-layered patches, or change patch shape, effect is very not remarkable, significantly increased antenna volume when improving bandwidth, sacrificed the little advantage of microstrip antenna volume, in many mobile communication or conformally integrated etc. antenna volume is required can't adopt under the harsh occasion, and causing the course of processing of antenna more complicated, cost improves.
Summary of the invention purpose of the present invention is exactly low at the narrow efficient of microstrip antenna frequency band, proposes a kind of novel microstrip antenna that has split ring resonator, and it not only has broadband, high-gain, and it is little to have a volume, low section, characteristic of simple structure.The metal openings resonant ring has negative magnetoconductivity under certain frequency range, can form the forbidden band at the resonance working frequency range, this characteristic is applied to the parasitic radiation that microstrip antenna can suppress microstrip antenna when work excited surface ripple and feeding network effectively, improves the microstrip antenna performance thereby improve radiation efficiency.Adopt the method for metal-loaded split ring resonator, the microstrip antenna that can be applicable under the various occasions is transformed, and adopts printed circuit board manufacturing process equally, and is one-body molded with microstrip antenna, with low cost.
The microstrip antenna that has split ring resonator among the present invention mainly comprises:
One medium substrate
One metal ground plate, this metal ground plate is produced on the side of described medium substrate with the form of metal micro-strip.
One radiation metal paster, this metal patch is produced on the another side of described medium substrate with the form of metal micro-strip, closes on centre in the one side and gets a distributing point.
One metal probe, this probe one end links to each other with metal patch.
One coaxial socket, this coaxial socket inner wire links to each other with metal probe, and the outer conductor metal ground plate links to each other.
Metal openings resonant ring unit, the geometry of ring is divided circular or polygon, adopts inner and outer ring nested, concentric or monocycle form; This metal openings resonant ring unit is periodic arrangement around described metal patch.
Description of drawings:
The structural representation of band metal openings resonant ring microstrip antenna among Fig. 1 the present invention
Adopt the metal openings resonant ring cell schematics that sun is carved and cloudy carving technology prepares among Fig. 2 the present invention
The metal openings resonant ring structural representation that is radial arrangement for preparing at the positive carving technology of the positive employing of microstrip antenna among Fig. 3 the present invention
Adopt the metal openings resonant ring array structure schematic diagram of cloudy carving technology preparation among Fig. 4 the present invention at the microstrip antenna back side
Load the positive carving technology metal openings resonant ring array structure schematic diagram of radial arrangement among Fig. 5 the present invention in the microstrip antenna front
Load cloudy carving technology metal openings resonant ring array structure schematic diagram among Fig. 6 the present invention at the microstrip antenna array back side
The size schematic diagram of metal openings resonant ring among Fig. 7 the present invention
Embodiment the present invention adopts the pcb board lithographic technique to make microstrip antenna, in microstrip antenna structure shown in Figure 1,2 one of metal probes link to each other with radiation metal paster 1 by boring good aperture in advance on medium substrate 3 and metal ground plate 4, the other end links to each other with the inner wire of coaxial socket 5, and the outer conductor 6 of coaxial socket links to each other with metal ground plate 4.Etch metal openings resonant ring unit 7 on medium substrate 3, this resonant element is periodic arrangement on medium substrate 3.According to embodiment, metal openings resonant ring unit 7 adopts positive quarter, the moon to carve two kinds of technologies:
As shown in Figure 3, positive carving technology is the metal openings resonant ring that etches the sunny side pattern in the one side that dielectric-slab has a radiation metal paster, and the opening direction of all metal openings resonant ring outer shrouds is arranged in parallel or in the same direction towards paster direction radial arrangement.Because microstrip antenna is a kind of Open architecture, not only outwards radiated electromagnetic wave but also meeting dielectric surface inspire the surface wave of propagating along dielectric surface when work, the energy of surface wave mainly concentrates on the dielectric layer near surface, in case leave the surface, field intensity is exponential damping with the distance of leaving, so the part energy that surface wave is taken away inefficient major reason that is microstrip antenna, adopt the forbidden band of the metal openings resonance generation of positive carving technology can significantly suppress surperficial wave propagation, allow this part surface wave energy participate in antenna to external radiation.Machine simulation and actual test as calculated, the best minimum centers-distance of metal openings resonant ring and radiation metal paster is from D ≈ λ/2, and λ is the central task wavelength of microstrip antenna for this reason.
As shown in Figure 4, cloudy carving technology is the metal openings resonant ring groove that etches back pattern in the one side that dielectric-slab has a metal ground plate, the metal openings resonant ring of carving cover the feed part of microstrip antenna, metal openings resonant ring outer ring opening direction is in the same direction.Because microstrip antenna array is a solution that improves microstrip antenna bandwidth and gain and manufacturing phased array antenna, yet the feeding network that is complementary with it will inevitably produce near the parasitic radiation some operating frequency of antenna scopes, cause emittance to run off, further also may worsen directional diagram.Adopt the forbidden band of the cloudy metal openings resonant ring of carving of ground plate can effectively suppress these parasitic radiation.
As Fig. 7, the physical dimension of metal openings resonant ring unit is according to the operating frequency adjustment of microstrip antenna.From 8～12GHz, then designing and encircling inscribed circle diameter in the resonant ring dicyclo unit is φ as microstrip antenna central task frequency
i=0.5～1.0mm, outer shroud inscribed circle diameter are φ
o=2.2～4.0mm, live width w=0.1～0.5mm, opening g=0.1～0.3mm, column pitch d
1=3.3～5mm, line space d
2=5～8mm; Or monocycle unit inscribed circle diameter φ=2.0～3.8mm, live width w=0.1～0.5mm, aperture pitch g=0.1～0.3mm, column pitch d
1=3.3～5mm, line space d
2=5～8mm.
The performance of implementation procedure of the present invention and material is by embodiment and description of drawings:
Embodiment one:
As shown in Figure 3, adopt the pcb board lithographic technique to make microstrip antenna, the centre frequency of antenna is at 10.5GHz, and the radiation metal paster of designing is the square of 7.8mm * 7.8mm, and metal ground plate is the square of 65mm * 65mm.Select hexagon metal openings resonant ring dicyclo unit for use: the inner and outer ring inscribed circle diameter is respectively φ
i=1mm, φ
o=2mm, live width w=0.3mm, opening g=0.25mm.The square of getting 65mm * 65mm * 1.5mm applies copper PTFE medium substrate (ε=2.6), one side etching radiation metal paster and the positive carving technology metal openings resonant ring unit that is periodic arrangement, its arrangement mode is: per two metal openings resonant ring unit outer ring openings are towards identical, with Center Gap d
1=3.3mm lines up row, the interval d of per two row
2=5mm, the minimum centers-distance of ring element and radiation patch is arranged 216 metal openings resonant ring unit altogether from greater than 24mm in the array.From one side of radiation metal paster at interval the axial location of the 2.3mm circular hole of beating diameter 1mm be taken as distributing point, an end of metal probe is welded on the distributing point, the other end links to each other with the inner wire of coaxial socket; The outer conductor of coaxial socket is welded on the metal ground plate, finishes the making of antenna.
Embodiment two:
Similar in embodiment one, adopt the pcb board lithographic technique to make microstrip antenna, the centre frequency of antenna is at 10.5GHz, and the radiation metal paster of designing is the square of 7.8mm * 7.8mm, and metal ground plate is the square of 65mm * 65mm.Select square metal split ring resonator monocycle unit for use: monocycle inscribed circle diameter φ=1.8mm, live width w=0.3mm, opening g=0.25mm.The square of getting 65mm * 65mm * 1.5mm applies copper PTFE medium substrate (ε=2.6), one side etching radiation metal paster and the positive carving technology metal openings resonant ring unit that is periodic arrangement, its arrangement mode is: per two metal openings resonant ring cell rings openings are towards identical, with Center Gap d
1=3.5mm lines up row, the interval d of per two row
2=7mm, the minimum centers-distance of ring element and radiation patch is arranged 216 metal openings resonant ring unit altogether from greater than 24mm in the array.From one side of radiation metal paster at interval the axial location of the 2.3mm circular hole of beating diameter 1mm be taken as distributing point, an end of metal probe is welded on the distributing point, the other end links to each other with the inner wire of coaxial socket; The outer conductor of coaxial socket is welded on the metal ground plate, finishes the making of antenna.
Embodiment three:
As shown in Figure 5, adopt the pcb board lithographic technique to make microstrip antenna, the centre frequency of antenna is at 8.14GHz, and the radiation metal paster of designing is the circle of radius 5mm, and metal ground plate is the square of 60mm * 60mm.Select circular metal split ring resonator dicyclo unit for use: monocycle inscribed circle diameter φ=2.2mm, live width w=0.3mm, opening g=0.2mm; Dicyclo inner and outer ring diameter is respectively φ
i=1mm, φ
o=3mm, live width w=0.3mm, opening g=0.2mm.The square of getting 60mm * 60mm * 1.5mm applies copper PTFE medium substrate (ε=2.6), one side etching radiation metal paster and Yang Ke metal openings resonant ring cell array, its arrangement mode is that per two metal openings resonant ring unit outer ring openings are towards identical, and towards the radiation metal paster, with Center Gap d
1=4mm lines up row, is radial arrangement along paster, per two column pitch d
2〉=5mm lines up row, and the minimum centers-distance of ring element and radiation patch is arranged 70 metal openings resonant ring unit altogether from greater than 50mm in the array.Be taken as distributing point at the circular hole of beating diameter 1mm from the axial location of the Center Gap 1.5mm of radiation metal paster, an end of metal probe is welded on the distributing point, the other end links to each other with the inner wire of coaxial socket; The outer conductor of coaxial socket is welded on the metal ground plate, finishes the making of antenna.
Embodiment four:
As shown in Figure 6, adopt the pcb board lithographic technique to make microstrip antenna, the two unit of design micro-strip antenna array, operating frequency connects with the quarter-wave power divider between two antenna elements at 12GHz.Select triangle metal split ring resonator monocycle or dicyclo unit this moment for use: monocycle inscribed circle diameter φ=1.8mm, live width w=0.25mm, opening g=0.3mm; Dicyclo inner and outer ring diameter is respectively φ
i=0.8mm, φ
o=2.2mm, live width w=0.22mm, opening g=0.25mm.Etching is the cloudy carving technology split ring resonator unit of periodic arrangement on metal ground plate, and its arrangement mode is: per two metal openings resonant ring unit outer ring openings are towards identical, with center distance d
2=6mm arranges, and the moon is carved the power divider that metal openings resonant ring array must be able to cover antenna face.
The above only is the preferred embodiments of the present invention, can not limit scope of the invention process with this, and promptly all simple equivalent of being done according to claim of the present invention and description of the invention content change and modify, and all should still belong in the scope that patent of the present invention covers.
Claims (4)
1. microstrip antenna that has metal openings resonant ring (SRRs), mainly include: the radiation metal paster, medium substrate, metal base plate, metal openings resonant ring, coaxial probe, coaxial socket, an end of coaxial probe links to each other with the radiation metal paster, and the other end links to each other with the inner wire of coaxial socket, the coaxial socket outer conductor links to each other with metal base plate, is primarily characterized in that: the metal openings resonant ring array that etches periodic arrangement on the medium substrate of microstrip antenna.
2. microstrip antenna according to claim 1 is characterized in that the geometry of metal openings resonant ring has two kinds:
(1) each metal openings resonant ring unit is circular, polygonal concentric internal and external double-circular structure, and interior ring inscribed circle diameter is φ
i=0.5～1.0mm, outer shroud inscribed circle diameter are φ
o=2.2～4.0mm, live width w=0.1～0.5mm, aperture pitch g=0.1～0.3mm, the centre frequency of resonance be positioned at X-band therewith the work centre frequency of antenna equate;
(2) each metal openings resonant ring unit is circular, polygonal single ring architecture, monocycle inscribed circle diameter φ=2.0～3.8mm, live width w=0.1～0.5mm, aperture pitch g=0.1～0.3mm, the centre frequency of resonance be positioned at X-band therewith the work centre frequency of antenna equate.
3. micro-strip paster antenna according to claim 1 is characterized in that:
(1) the metal openings resonant ring array of periodic arrangement be per two metal openings resonant ring unit outer ring openings in the same way, with center distance d
1=3.3～5mm lines up row, the spacing d of per two row
2=5～8mm forms array, around the radiation metal paster;
(2) the metal openings resonant ring array of periodic arrangement be per two metal openings resonant ring unit outer ring openings in the same way, with center distance d
1=3.3～5mm lines up row, and the spacing d2 〉=5mm of per two row forms array, lines up radial around the radiation metal paster.
4. microstrip antenna according to claim 1 is characterized in that the preparation of metal openings resonant ring can be realized by the following two kinds of methods of process:
(1) adopting positive carving technology is the metal line pattern that etches the metal openings resonant ring on the copper dielectric-slab applying, around the radiation metal paster;
(2) adopting cloudy carving technology is the deposited copper foil groove pattern that etches the metal openings resonant ring on the copper dielectric-slab applying, the feeding network in cover antenna front.
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| CN200510042743A CN100580994C (en) | 2005-05-31 | 2005-05-31 | Microstrip antenna with open-ended resonance ring(SRRs) |
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| CN200510042743A CN100580994C (en) | 2005-05-31 | 2005-05-31 | Microstrip antenna with open-ended resonance ring(SRRs) |
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| CN1874066A true CN1874066A (en) | 2006-12-06 |
| CN100580994C CN100580994C (en) | 2010-01-13 |
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| CN101359775B (en) * | 2008-09-18 | 2012-08-08 | 中国科学院光电技术研究所 | Two-dimensional groove directed microstrip paster antenna |
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