CN101626110A - Novel C-band microstrip antenna with negative permeability material - Google Patents
Novel C-band microstrip antenna with negative permeability material Download PDFInfo
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- CN101626110A CN101626110A CN200810150316A CN200810150316A CN101626110A CN 101626110 A CN101626110 A CN 101626110A CN 200810150316 A CN200810150316 A CN 200810150316A CN 200810150316 A CN200810150316 A CN 200810150316A CN 101626110 A CN101626110 A CN 101626110A
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Abstract
The invention relates to a novel C-band (4GHz-8GHz) microstrip antenna with a negative permeability material, in particular to a novel antenna with a negative permeability material with a two-sided dendritic structure. The microstrip antenna in the invention comprises a dielectric substrate, a metal radiation patch and a metal ground plate; wherein, an SMA connector connects the metal radiation patch and the metal ground plate and serves as a feed-in interface of radio wave signals of the antenna; dendritic structure cell arrays arranged periodically are etched at both sides of the space around the metal radiation patch and the metal ground plate. When microwaves enter vertically, the negative permeability effect generated by the two-sided dendritic structure can be adopted to improve the signal receiving and transmitting capabilities of the microstrip antenna and increase the antenna gain.
Description
Technical field
The present invention relates to a kind of microstrip antenna, specifically, (4GHz～utilization 8GHz) has the new antenna of two-sided dendritic structure negative magnetic-inductive capacity material raising antenna gain to relate to a kind of C-band.
Background technology
Matematerials is as the common name of a class artificial composite material, and its focus of studying at present concentrates on EBG and LHM technology.These materials all are synthetic materials, all show some in the electromagnetism field in the non-existent phenomenon of occurring in nature, picture frequency rate forbidden band, negative index etc.In the time of in they being applied to microwave and millimeter wave engineering field, can significantly improve the performance of some equipment and device, as improving antenna gain, reduce coupling between array element, make high Q resonant cavity, realizing perfect lens etc.We can say that the appearance of these artificial materials provides possible solution for overcoming current some technical restrictions that run in fields such as antenna, communications.
Microstrip antenna commonly used is on a thin-medium substrate, one side is enclosed thin metal layer as ground plate, another side is made the metal radiation patch of definite shape with methods such as photoetching corrosions, utilizes microstrip line or coaxial probe to the paster feed, and this has just constituted microstrip antenna.It is little, in light weight that microstrip antenna has a volume, low section, can be conformal with carrier (as aircraft), advantages such as electrical property variation, thereby very wide application prospect is arranged, as microstrip antenna being used for satellite communication, radar, remote sensing, guided missile, aircraft altimeter etc.Wherein the microstrip antenna of C-band is used very extensive, centre frequency is that the microstrip antenna of 4.3GHz can be used on the aircraft altitude table, centre frequency is that the microstrip antenna of 5.45GHz can be used on the radar, centre frequency is that the common shaped microstrip phase array of 5GHz can be used on the aircraft skin, and these antenna all belongs to the microstrip antenna of C-band.But the working band of microstrip antenna is narrow, and it is low to gain, and cross polarization is strong, the power capacity of individual antenna is less, and loss is bigger, and efficient is lower, dielectric substrate is big to the performance impact of antenna, these disadvantages affect it in the more application in the instrument and equipment of high-performance and sensitivity of needs.
Dielectric constant and magnetic permeability are two fundamental physical quantities describing electromagnetic field character in the homogeneous medium.The dielectric constant of the most materials of occurring in nature and magnetic permeability are all for just.When the microwave vertical incidence, the magnetic permeability in that the dendritic structure of two-sided etching on the substrate can occur bearing in certain frequency range forms the forbidden band.This negative magnetic-inductive capacity material is used for microstrip antenna, can significantly improves the performance of antenna, this microstrip antenna has good application prospects in fields such as microelectronic circuits element, filter, radio communications.
Summary of the invention
The objective of the invention is provides a kind of C-band to have the microstrip antenna with negative permeability material of two-sided dendritic structure at the lower shortcoming of microstrip antenna gain.It has broadband, high-gain, low section, advantages of simple structure and simple.When electromagnetic wave during perpendicular to this material incident, it has negative magnetoconductivity under certain frequency range, a transmission forbidden band appears, the parasitic radiation of excited surface ripple and feeding network when this characteristic can suppress microstrip antenna work effectively, thereby improve the radiation efficiency of antenna, improve the microstrip antenna performance.Two-sided dendritic structure that is loaded and microstrip antenna adopt circuit board lithographic technique processing and fabricating equally, and be one-body molded with microstrip antenna, and preparation is simple, and is with low cost.
The microstrip antenna with negative permeability material that the present invention proposes comprises: medium substrate; The metal radiation patch is in a side of medium substrate; Metal ground plate, at the opposite side of medium substrate, size is bigger than the metal radiation patch; The SMA coaxial fitting, its metal probe links to each other with metal patch, and coaxial base inner wire links to each other with metal probe, and outer conductor links to each other with metal ground plate, and as the feed-in interface of antenna electric wave signal.The two-sided branch shape structural unit array of periodic arrangement is etched in the blank space around radiation patch and the metal ground plate, the strict alignment of the dendritic structure on two sides.When the microwave vertical incidence, utilize the forbidden band effect of two-sided dendritic structure generation, improve the signal reception and the emissivities of microstrip antenna, the gain that improves antenna.
Description of drawings
The size schematic diagram of used two-sided dendritic structure among Fig. 1 the present invention
The schematic diagram that has the microstrip antenna of two-sided dendritic structure among Fig. 2 the present invention
The positive sun of microstrip antenna is carved the dendritic structure schematic diagram of periodic arrangement among Fig. 3 the present invention
Microstrip antenna back side sun is carved the dendritic structure schematic diagram of periodic arrangement among Fig. 4 the present invention
The return loss plot of microstrip antenna with negative permeability material and common antenna among Fig. 5 the present invention
The E face directional diagram of microstrip antenna with negative permeability material and common antenna among Fig. 6 the present invention
The H face directional diagram of microstrip antenna with negative permeability material and common antenna among Fig. 7 the present invention
Embodiment
Adopt the preparation of circuit board lithographic technique to have the microstrip antenna of two-sided dendritic structure negative magnetic-inductive capacity material.With thickness is the polytetrafluoroethylmaterial material (ε=2.65) of 0.8mm～2mm or expoxy glass cloth material (ε=4.6) medium substrate as antenna, metal radiation patch and metal ground plate difference etching are in the positive and negative of medium substrate, connect radiation patch and metal ground plate with the SMA coaxial fitting, and as the electric wave signal feed-in source of antenna.The two-sided Metal tree dendritic morphology that etches periodic arrangement on the blank medium plate around radiation sheet metal and the metal ground plate, the strict alignment of the dendritic structure on two sides, as shown in Figure 1.The physical dimension of branch shape structural unit is according to the operating frequency adjustment of microstrip antenna.Microstrip antenna of the present invention works in C-band (4GHz～8GHz), then She Ji dendritic structure therefrom the branch length at different levels of mind-set periphery be respectively: one-level branch length a=2mm～5mm, secondary branch length b=1mm～3mm, three grades of length c=1mm～3mm of branch, lattice constant d=8mm～20mm, angle is θ between adjacent two one-level branches
1=45 °, angle is θ between adjacent two secondary branches
2=45 °, angle is θ between adjacent two three grades of branches
3=45 °, live width is w=0.3mm～1mm, and metal thickness is t=0.01mm～0.05mm.
The performance of implementation procedure of the present invention and material is by embodiment and description of drawings:
Embodiment one:
Adopt the circuit board lithographic technique, make the microstrip antenna that have two-sided dendritic structure of central task frequency, as shown in Figure 2 at the 5.28GHz place.Fig. 3 and Fig. 4 are respectively the front elevation and the back views of antenna.Selecting area for use is 120mm * 120mm, thickness is the medium substrate 1 of the polytetrafluoroethylmaterial material (ε=2.65) of 1.5mm as antenna, the size of the metallic copper radiation patch 2 of medium substrate one side is 20.6mm * 16.3mm, another side etching metal ground plate 3, ground plate is more bigger than radiation patch, is 30mm * 30mm.The strict alignment of the dendritic structure of 4, two faces of the two-sided etching dendritic structure of blank space around radiation patch and ground plate.For the microstrip antenna of present embodiment, the physical dimension of dendritic structure is: one-level branch length a=3.3mm, and secondary branch length b=1.7mm, three grades of length c=1.7mm of branch, angle is θ between adjacent two one-level branches
1=45 °, angle is θ between adjacent two secondary branches
2=45 °, angle is θ between adjacent two three grades of branches
3=45 °, live width w=0.8mm, the lattice constant d=15.99mm between the branch shape structural unit, as shown in Figure 1.On radiation metal paster axis, choose the distributing point that diameter is 1.3mm, metal radiation patch 2 and metal ground plate 3 are coupled together, finish the making of antenna with sub-miniature A connector 5 apart from symmetrical centre 3.6mm place.Fig. 5 is an antenna and adopt the same media substrate to be operated in the return loss plot of the common microstrip antenna of same frequency among the present invention, resonance all takes place in two kinds of antennas at the 5.28GHz place, the resonance intensity of antenna is-29.85dB among the present invention, has strengthened 7.1dB than common antenna resonance.By antenna among Fig. 6 and Fig. 7 as can be known at the E at resonance frequency place, H face directional diagram, the maxgain value of the negative magnetic-inductive capacity material antenna among the present invention is 7.52dBi, the gain of common antenna only is 6.08dBi, and institute's invention antenna has improved 1.44dB than common antenna gain.
Embodiment two:
Similar to embodiment one, adopt the circuit board lithographic technique, make the microstrip antenna that have two-sided dendritic structure of central task frequency at the 6.53GHz place, selecting area for use is 90mm * 90mm, thickness is the medium substrate of the polytetrafluoroethylmaterial material (ε=2.65) of 1mm as antenna, and the size of the metallic copper radiation patch of medium substrate one side is 16.8mm * 12.9mm, another side etching metal ground plate, ground plate is more bigger than radiation patch, is 25mm * 25mm.The two-sided etching dendritic structure of blank space between radiation patch and ground plate, the strict alignment of the dendritic structure of two faces.For the microstrip antenna of present embodiment, the physical dimension of dendritic structure is: one-level branch length a=2.7mm, and secondary branch length b=1.3mm, three grades of length c=1.3mm of branch, angle is θ between adjacent two one-level branches
1=45 °, angle is θ between adjacent two secondary branches
2=45 °, angle is θ between adjacent two three grades of branches
3=45 °, live width w=0.6mm, the lattice constant d=13mm between the branch shape structural unit.On metal radiation patch axis, choose the distributing point that diameter is 1.3mm, metal radiation patch and metal ground plate are coupled together, finish the making of antenna with sub-miniature A connector apart from symmetrical centre 2.9mm place.
Embodiment three:
Similar to embodiment one, adopt the circuit board lithographic technique, make the microstrip antenna that have two-sided dendritic structure of central task frequency at the 7.12GHz place, selecting area for use is 85mm * 85mm, thickness is the medium substrate of the expoxy glass cloth material (ε=4.6) of 1mm as antenna, and the size of the metallic copper radiation patch of medium substrate one side is 11.7mm * 8.7mm, another side etching metal ground plate, ground plate is more bigger than radiation patch, is 18mm * 18mm.The two-sided etching dendritic structure of blank space between radiation patch and ground plate, the strict alignment of the dendritic structure of two faces.For the microstrip antenna of present embodiment, the physical dimension of dendritic structure is: one-level branch length a=2.9mm, and secondary branch length b=1.5mm, three grades of length c=1.5mm of branch, angle is θ between adjacent two one-level branches
1=45 °, angle is θ between adjacent two secondary branches
2=45 °, angle is θ between adjacent two three grades of branches
3=45 °, live width w=0.5mm, the lattice constant d=14mm between the branch shape structural unit.On metal radiation patch axis, choose the distributing point that diameter is 1.3mm, metal radiation patch and metal ground plate are coupled together, finish the making of antenna with sub-miniature A connector apart from symmetrical centre 1.8mm place.
The above only is the preferred embodiments of the present invention, can not limit scope of the invention process with this, i.e. the simple equivalence of being done according to claim of the present invention and description of the invention content generally changes and modifies, and all should still belong in the scope of patent covering of the present invention.
Claims (4)
1. novel microstrip antenna with negative permeability material of C-band, composition comprises: medium substrate, metal radiation patch, metal ground plate, SMA coaxial fitting, its principal character is the Metal tree dendritic morphology cell array of two-sided etching periodic arrangement around the paster of common microstrip antenna and ground plate, the strict alignment of the dendritic structure on two sides.
2. the novel microstrip antenna with negative permeability material of C-band as claimed in claim 1, the geometric parameter that it is characterized in that being used for the metal branch shape structural unit of microstrip antenna is: one-level branch length a=2.7mm～3.3mm, secondary branch length b=1.3mm～1.7mm, three grades of length c=1.3mm～1.7mm of branch, lattice constant d=13mm～15.99mm, angle is θ between adjacent branches at different levels
1=θ
2=θ
3=45 °, live width is w=0.5mm～0.8mm, metal thickness t=0.01mm～0.03mm.
3. the novel microstrip antenna with negative permeability material of C-band as claimed in claim 1 is characterized in that the used medium substrate is that thickness is polytetrafluoroethylmaterial material or the expoxy glass cloth material of 0.8mm～1.5mm; Used metal material is a copper.
4. the novel microstrip antenna with negative permeability material of C-band as claimed in claim 1 is characterized in that manufacturing process comprises:
(1) adopts the circuit board lithographic technique, etch metal ground plate and metal radiation patch respectively in the medium substrate both sides, and the Metal tree dendritic morphology cell array of the two-sided etching periodic arrangement of blank space around metal radiation patch and metal ground plate, the strict alignment of the dendritic structure on two sides.
(2) choose the feedback point, and connect metal radiation patch and metal ground plate with the SMA coaxial fitting at feedback point place.
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| CN200810150316A CN101626110A (en) | 2008-07-11 | 2008-07-11 | Novel C-band microstrip antenna with negative permeability material |
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| CN200810150316A CN101626110A (en) | 2008-07-11 | 2008-07-11 | Novel C-band microstrip antenna with negative permeability material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296369A (en) * | 2012-02-29 | 2013-09-11 | 深圳光启创新技术有限公司 | Resonance cavity |
| CN109586023A (en) * | 2019-01-07 | 2019-04-05 | 云南大学 | Rectangular microstrip antenna based on Metamaterial dielectric substrate |
| CN109904601A (en) * | 2019-03-02 | 2019-06-18 | 湖南大学 | A kind of periodicity class snowflake structure ultra-wideband antenna |
| WO2021203529A1 (en) * | 2020-04-08 | 2021-10-14 | 南京步微信息科技有限公司 | Low-profile wideband antenna |
| EP3830900A4 (en) * | 2018-08-03 | 2022-05-04 | Quintel Cayman Limited | Parasitic elements for isolating orthogonal signal paths and generating additional resonance in a dual-polarized antenna |
-
2008
- 2008-07-11 CN CN200810150316A patent/CN101626110A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296369A (en) * | 2012-02-29 | 2013-09-11 | 深圳光启创新技术有限公司 | Resonance cavity |
| CN103296369B (en) * | 2012-02-29 | 2017-03-22 | 深圳光启创新技术有限公司 | Resonance cavity |
| EP3830900A4 (en) * | 2018-08-03 | 2022-05-04 | Quintel Cayman Limited | Parasitic elements for isolating orthogonal signal paths and generating additional resonance in a dual-polarized antenna |
| CN109586023A (en) * | 2019-01-07 | 2019-04-05 | 云南大学 | Rectangular microstrip antenna based on Metamaterial dielectric substrate |
| CN109904601A (en) * | 2019-03-02 | 2019-06-18 | 湖南大学 | A kind of periodicity class snowflake structure ultra-wideband antenna |
| CN109904601B (en) * | 2019-03-02 | 2024-01-02 | 湖南大学 | Periodic snowflake-like structure ultra-wideband antenna |
| WO2021203529A1 (en) * | 2020-04-08 | 2021-10-14 | 南京步微信息科技有限公司 | Low-profile wideband antenna |
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Application publication date: 20100113 |