CN115441206B - Lens antenna - Google Patents
Lens antenna Download PDFInfo
- Publication number
- CN115441206B CN115441206B CN202211196926.3A CN202211196926A CN115441206B CN 115441206 B CN115441206 B CN 115441206B CN 202211196926 A CN202211196926 A CN 202211196926A CN 115441206 B CN115441206 B CN 115441206B
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- Prior art keywords
- lens
- metal
- radiator
- circularly polarized
- cavity
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Waveguide Aerials (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention relates to the technical field of microwaves and discloses a lens antenna which comprises a feed structure, a radiator and a metal lens, wherein the feed structure is arranged on the radiator; the feed structure comprises a radio frequency coaxial connector and a coupling feed metal sheet, and the coupling feed metal sheet is electrically connected with the radio frequency coaxial connector; the radiator comprises cavity radiators and circularly polarized radiation metal sheets, the number of the circularly polarized radiation metal sheets is two or more than two, and the cavity radiators are provided with accommodating cavities; the metal lens is positioned at the front end of the cavity radiator and comprises a plurality of metal sheets with different lengths; the coupling feed metal sheet and the circularly polarized radiation metal sheet are positioned in the accommodating cavity. The technical scheme of the invention aims to solve the defects of the circularly polarized antenna and the lens antenna, and reduces the feeder line loss and the space loss.
Description
Technical Field
The invention relates to the technical field of microwaves, in particular to a lens antenna.
Background
The development of modern information technology, the high-frequency fields such as millimeter waves, sub-millimeter waves and the like can be widely applied to the fields such as aerospace, satellite communication, missile guidance, anti-collision radar and the like; the high-frequency band device has particularly strict index requirements on the antenna, such as wide frequency band, high gain, anti-interference capability, low side lobe, miniaturization and the like, and the traditional array antenna is particularly difficult to realize.
The circularly polarized antenna comprises a microstrip circularly polarized antenna and a metal circularly polarized antenna according to the material property, and the microstrip circularly polarized antenna has the characteristics of small volume, easy matching and the like, but has lower efficiency; the metal circularly polarized antenna has the advantages of high efficiency, small axial ratio and the like, but has the defects of large volume and the like; the lens antenna is provided with a dielectric lens antenna and a metal lens antenna, and the dielectric lens antenna is easy to realize better impedance matching, but has the defects of large volume and mass, large dielectric loss and high processing cost; compared with a dielectric lens antenna, the metal lens antenna has the advantages of simple structure, low processing cost, strong robustness and the like, but has the characteristics of high profile, insignificant gain improvement and the like if improperly designed, and needs to be designed in a fine manner.
Therefore, it is necessary to provide an antenna structure with the advantages of a circularly polarized antenna and a metal lens antenna, which reduces the feeder line loss and greatly reduces the space loss of the W frequency band.
Disclosure of Invention
The invention mainly aims to provide a lens antenna, which aims to solve the defects of a circularly polarized antenna and a lens antenna, reduce the feeder line loss and simultaneously reduce the space loss.
In order to achieve the above object, the present invention provides a lens antenna, which includes:
the feed structure comprises a radio frequency coaxial connector and a coupling feed metal sheet, and the coupling feed metal sheet is electrically connected with the radio frequency coaxial connector;
the radiator comprises a cavity radiator and circularly polarized radiation metal sheets, wherein the number of the circularly polarized radiation metal sheets is two or more than two, and the cavity radiator is provided with a containing cavity;
the metal lens is positioned at the front end of the cavity radiator and comprises a plurality of lens metal sheets with different lengths;
the coupling feed metal sheet and the circularly polarized radiation metal sheet are positioned in the accommodating cavity.
In some embodiments of the present invention, a plurality of the lens metal sheets are sequentially arranged at intervals in a grid structure.
In some embodiments of the present invention, the cavity radiator and the circularly polarized radiating metal plate each adopt a chamfer structure.
In some embodiments of the invention, the distance between the radiator and the metal lens satisfies the following formula:
f is the focal length of the lens, n is the equivalent dielectric constant, and R1 and R2 are the two focal lengths of the metal lens.
In some embodiments of the invention, the spacing of the lens metal sheets satisfies the following formula:
λ 0 lambda is the wavelength in air a Is the wavelength of the TE10 mode between the lens metal sheets.
In some embodiments of the present invention, the profiles of the cavity radiator and the circularly polarized radiation metal sheet are hexagonal along the cross section in the horizontal direction, and the adjacent sides of the profiles are arranged at an included angle.
In some embodiments of the invention, the metal lens is near the top of the cavity radiator relative to the circularly polarized metal sheet.
In some embodiments of the invention, the circularly polarized metal sheet is located at a focal length of the metal lens.
In some embodiments of the invention, the metal lens, the radiator, and the metal lens are all integrally machined structures.
In some embodiments of the present invention, the feeding structure, the radiator and the metal lens are all made of metal.
According to the technical scheme, the circular polarization radiation metal sheet and the metal lens are arranged in the cavity radiator, so that the advantages of high radiation efficiency and low transmission loss of the antenna of the circular polarization radiation metal sheet in the cavity radiator are combined, the metal lens is additionally arranged, the radiator is used as a feed source, a conduction mode between the feed source and the metal lens is analyzed, the metal lens is enabled to increase conduction radiation efficiency, and space loss is reduced while feeder loss is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a lens antenna according to the present invention;
FIG. 2 is a second schematic diagram of a lens antenna according to the present invention;
fig. 3 is a schematic structural diagram of a feeding structure and a radiator according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Feed structure | 220 | Circularly polarized radiation metal sheet |
| 200 | Radiator body | 300 | Metal lens |
| 210 | Cavity radiator | 310 | Lens sheet metal |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.
The lens antenna provided by the invention comprises a feed structure 100, a radiator 200 and a metal lens 300, wherein a cavity radiation mode of the lens antenna is realized through the feed structure 100, and the radiation efficiency is increased through the radiator 200 and the metal lens 300.
Referring to fig. 1-3, a feed structure 100 includes a radio frequency coaxial connector and a coupling feed metal sheet electrically connected to the radio frequency coaxial connector; the coupling feed metal sheet is directly connected with the inner conductor of the radio frequency coaxial connector.
The radiator 200 includes a cavity radiator 210 and circularly polarized radiating metal sheets 220, the number of the circularly polarized radiating metal sheets 220 is two or more, and the cavity radiator 210 is provided with a receiving cavity; the radiator 200 is formed by combining the circularly polarized radiation metal sheet 220 with the wall radiator to radiate from the outside.
The metal lens 300 is positioned at the front end of the cavity radiator 210, and the metal lens 300 comprises a plurality of lens metal sheets 310 with different lengths;
the coupling feed metal sheet and the circularly polarized radiation metal sheet 220 are positioned in the accommodating cavity, and the guided wave is converted into a cavity radiation mode through the coupling feed structure 100 by the radio frequency coaxial connector, so that mode conversion is realized.
Based on the technical characteristics, by arranging the circularly polarized radiation metal sheet 220 and the metal lens 300 in the cavity radiator 210, the advantages of high antenna radiation efficiency and low transmission loss of the circularly polarized radiation metal sheet 220 in the cavity radiator 210 are combined, and by additionally arranging the metal lens 300, the radiator 200 is used as a feed source, and a conduction mode between the feed source and the metal lens 300 is analyzed, so that the metal lens 300 increases conduction radiation efficiency, and reduces the feed line loss and space loss.
Wherein, a plurality of sheetmetals are the grid structure in proper order interval arrangement, and the volume of lens sheetmetal 310 increases gradually from the centre towards both sides, realizes that the electromagnetic wave radiates with the form of plane wave, better realization lens sheetmetal 310 is to radiation gain effect.
In this embodiment, the cavity radiator 210 and the circularly polarized radiation metal sheet 220 both adopt corner cutting structures; further, the cross section along the horizontal direction, the outline of the cavity radiator 210 and the circular polarization radiating metal plate 220 are all hexagonal, and the adjacent sides of the outline are arranged with an included angle therebetween, so as to realize circular polarization of electromagnetic waves.
Specifically, the distance between the radiator 200 and the metal lens 300 satisfies the following formula:
f is a lens focal length, n is an equivalent dielectric constant, and R1 and R2 are two focal lengths of the metal lens 300, so as to ensure that a feed source amplifying effect can be realized between the radiator 200 and the metal lens 300.
The spacing of the lens metal sheets 310 satisfies the following formula:
λ 0 lambda is the wavelength in air a As the wavelength in the TE10 mode between the lens metal sheets 310, the distance between the metal sheets is calculated according to the air wavelength and the wavelength relationship between the metal sheets, so that the gain effect of the lens metal sheets 310 is better satisfied.
Firstly, calculating the distance between the antenna of the metal lens 300 and the radiation patch by using a formula; secondly, calculating the distance a between the metal sheets by using a formula; so that the lens metal sheet 310 of the lens antenna and the distance between the radiator 200 and the metal lens 300 are in an optimal range, an optimal radiation effect is achieved.
The metal lens 300 is close to the top of the cavity radiator 210 with respect to the circularly polarized metal sheet, so that the gain of the metal lens 300 to the circularly polarized metal sheet radiation is facilitated, and the gain effect is improved.
The circularly polarized metal sheet is located at the focal distance of the metal lens 300, so that the radiation signal of the circularly polarized metal sheet can achieve the maximum gain at the focal distance of the metal lens 300 during feedback.
In this embodiment, the metal lens 300, the radiator 200 and the metal lens 300 are all integrally processed; meanwhile, the material of the feed structure 100, the radiator 200 and the metal lens 300 is metal; adopting an all-metal structure form to realize integrated compact design; and combines the advantages of two passive devices, such as high radiation efficiency, low cost, stability and the like, of the circularly polarized antenna and the metal lens 300 antenna, thereby realizing the reduction of the cost and the improvement of the performance of the whole system.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (7)
1. A lens antenna, the lens antenna comprising:
the feed structure comprises a radio frequency coaxial connector and a coupling feed metal sheet, and the coupling feed metal sheet is electrically connected with the radio frequency coaxial connector;
the radiator comprises a cavity radiator and circularly polarized radiation metal sheets, wherein the number of the circularly polarized radiation metal sheets is two or more than two, and the cavity radiator is provided with a containing cavity;
the metal lens is positioned at the front end of the cavity radiator and comprises a plurality of lens metal sheets with different lengths;
the coupling feed metal sheet and the circularly polarized radiation metal sheet are positioned in the accommodating cavity, and the guided wave is converted into a cavity radiation mode through the coupling feed structure by the radio frequency coaxial connector, so that mode conversion is realized;
the lens metal sheets are sequentially arranged at intervals to form a grid structure, and the volume of the lens metal sheets is gradually increased from the middle to two sides;
the distance between the radiator and the metal lens satisfies the following formula:
f is the focal length of the lens, n is the equivalent dielectric constant, and R1 and R2 are the two focal lengths of the metal lens;
the spacing of the lens metal sheets satisfies the following formula:
λ 0 lambda is the wavelength in air a A wavelength in TE10 mode between the lens metal sheets;
firstly, calculating the distance between a metal lens antenna and a radiation patch by using a formula; secondly, calculating the distance a between the metal sheets by using a formula; so that the lens metal sheet of the lens antenna and the distance between the radiator 200 and the metal lens are in an optimal range, achieving an optimal radiation effect.
2. The lens antenna of claim 1, wherein the cavity radiator and the circularly polarized radiating metal plate each have a chamfer structure.
3. The lens antenna of claim 1, wherein the cavity radiator and the circularly polarized radiating metal plate each have a hexagonal shape in cross section along the horizontal direction, and adjacent sides of the outline are disposed at an included angle.
4. The lens antenna of claim 1 wherein the metal lens is adjacent to the top of the cavity radiator relative to the circularly polarized metal sheet.
5. The lens antenna of claim 1, wherein the circularly polarized metallic plate is positioned at a focal length of the metallic lens.
6. The lens antenna of claim 1, wherein the metal lens, the radiator, and the metal lens are all integrally machined structures.
7. The lens antenna of claim 1, wherein the feed structure, the radiator, and the metal lens are all metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211196926.3A CN115441206B (en) | 2022-09-28 | 2022-09-28 | Lens antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211196926.3A CN115441206B (en) | 2022-09-28 | 2022-09-28 | Lens antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115441206A CN115441206A (en) | 2022-12-06 |
| CN115441206B true CN115441206B (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211196926.3A Active CN115441206B (en) | 2022-09-28 | 2022-09-28 | Lens antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN115441206B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW583787B (en) * | 2002-03-07 | 2004-04-11 | Huan-Cheng Lien | The design method of the microwave concave lens antenna for converting omnidirectional radiation pattern into multi-beam with different beamwidth |
| WO2009093980A1 (en) * | 2008-01-22 | 2009-07-30 | Agency For Science, Technology & Research | Broadband circularly polarized patch antenna |
| CN101546864A (en) * | 2009-05-08 | 2009-09-30 | 电子科技大学 | Micro-strip patch ceramic antenna with back cavity electrode |
| CN107645051A (en) * | 2017-10-30 | 2018-01-30 | 广东工业大学 | A kind of circular polarized antenna of regular polygon paster |
| CN111864379A (en) * | 2020-08-25 | 2020-10-30 | 陕西天鼎无线技术股份有限公司 | Slot-coupled broadband single-feed circularly-polarized microstrip antenna |
| CN114188724A (en) * | 2021-11-04 | 2022-03-15 | 成都频岢微电子有限公司 | Metal lens and dual-polarized metal lens antenna |
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| JP2014165808A (en) * | 2013-02-27 | 2014-09-08 | East Nippon Expressway Co Ltd | Metal plate lens and performance evaluation method of radio wave absorber using the same |
| CN105940553A (en) * | 2014-02-14 | 2016-09-14 | Hrl实验室有限责任公司 | A reconfigurable electromagnetic surface of pixelated metal patches |
| WO2016049629A1 (en) * | 2014-09-26 | 2016-03-31 | The Board Of Trustees Of The Leland Stanford Junior University | Planar immersion lens with metasurfaces |
| CN204407501U (en) * | 2015-01-30 | 2015-06-17 | 深圳光启高等理工研究院 | Communication antenna, antenna system and communication apparatus |
| US9583840B1 (en) * | 2015-07-02 | 2017-02-28 | The United States Of America As Represented By The Secretary Of The Air Force | Microwave zoom antenna using metal plate lenses |
| CN106785409A (en) * | 2017-02-07 | 2017-05-31 | 中国人民解放军国防科学技术大学 | A kind of broadband and wide beamwidth micro-strip paster antenna |
| CN208580844U (en) * | 2018-08-21 | 2019-03-05 | 深圳市飞宇信电子有限公司 | A kind of circular polarized antenna |
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2022
- 2022-09-28 CN CN202211196926.3A patent/CN115441206B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW583787B (en) * | 2002-03-07 | 2004-04-11 | Huan-Cheng Lien | The design method of the microwave concave lens antenna for converting omnidirectional radiation pattern into multi-beam with different beamwidth |
| WO2009093980A1 (en) * | 2008-01-22 | 2009-07-30 | Agency For Science, Technology & Research | Broadband circularly polarized patch antenna |
| CN101546864A (en) * | 2009-05-08 | 2009-09-30 | 电子科技大学 | Micro-strip patch ceramic antenna with back cavity electrode |
| CN107645051A (en) * | 2017-10-30 | 2018-01-30 | 广东工业大学 | A kind of circular polarized antenna of regular polygon paster |
| CN111864379A (en) * | 2020-08-25 | 2020-10-30 | 陕西天鼎无线技术股份有限公司 | Slot-coupled broadband single-feed circularly-polarized microstrip antenna |
| CN114188724A (en) * | 2021-11-04 | 2022-03-15 | 成都频岢微电子有限公司 | Metal lens and dual-polarized metal lens antenna |
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| Publication number | Publication date |
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| CN115441206A (en) | 2022-12-06 |
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