CN201584500U - High-gain polarized alternating antenna - Google Patents
High-gain polarized alternating antenna Download PDFInfo
- Publication number
- CN201584500U CN201584500U CN2010200225125U CN201020022512U CN201584500U CN 201584500 U CN201584500 U CN 201584500U CN 2010200225125 U CN2010200225125 U CN 2010200225125U CN 201020022512 U CN201020022512 U CN 201020022512U CN 201584500 U CN201584500 U CN 201584500U
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- rectangular metal
- medium substrate
- gain
- polarization
- polarization conversion
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
A high-gain polarized alternating antenna comprises two parts including a feed source and a resonant cavity, wherein the feed source is positioned in the resonant cavity, the upper part of the resonant cavity is an upper medium baseplate (25), the lower part thereof is a lower medium baseplate (22), the upper and the lower medium baseplates are connected and fixed through a fastening piece (27), a clearance (26) is formed between the upper medium baseplate (25) and the lower medium baseplate (22), a partially reflecting surface (24) including rectangular metal paster arrays (23) is arranged on the lower surface of the upper medium baseplate (25), a ground plate (21) is arranged on the lower surface of the lower medium baseplate (22), and the partially reflecting surface (24) is made of rectangular metal paster arrays (23). The structure can realize that linearly polarized wave radiated by the feed source is converted to a cross line polarized wave perpendicular to the linearly polarized wave or a circularly polarized wave, and realizes the high gain at the same time.
Description
Technical field
The utility model relates to a kind of high-gain aerial, relates in particular to the disposable high-gain resonant antenna of a kind of polarization.
Background technology
The development an urgent demand antenna polarization attitude in fields such as modern radar, communication, electronic reconnaissance and antagonism can be made adaptive transformation according to the environment of transition, promptly needs Variable Polarization Antenna.Secondly in a lot of situations we also to need to change the polarization of electromagnetic wave characteristic be polarization conversion, in order to realize Polarization match, polarization isolation etc.Common measure is to load polarizer in antenna the place ahead, and the radiation beam of antenna is through the radiation again of polarizer twist-reflector.The polarizer that uses is many at present realizes by loading three-dimensional structures such as ferrite device, Waveguide polarization converter, simultaneously also just like printed form polarization changers such as the snakelike microstrip lines of multilayer, but all there is complex structure in above-mentioned polarization conversion device, and inconvenience is integrated with antenna.
Summary of the invention
Technical problem: the technical problems to be solved in the utility model provides a kind of simple in structure, need not any additional feeder network, need not additional any polarizer can realize in high-gain, and on broad frequency band, realize high-gain polarization conversion antenna.
Technical scheme: high-gain polarization conversion antenna of the present utility model, form by feed resonant cavity two parts, feed is arranged in resonant cavity, the top of resonant cavity is last medium substrate, the bottom is following medium substrate, the two is connected and fixed by securing member, is provided with the gap between last medium substrate and the following medium substrate, is provided with rectangular metal patch array component part reflecting surface at the lower surface of last medium substrate; Lower surface at following medium substrate is provided with ground plate.
Described partial reflection surface is made of the rectangular metal patch array.
Described rectangular metal patch array is made of along the long limit and the short side direction periodic arrangement of rectangle respectively the rectangular metal paster, and does not wait along the long limit of rectangle and the Cycle Length of short side direction, and the Cycle Length of short side direction is less than the Cycle Length of long side direction.
Described feed is made of half-wave dipole or its modification structures.
The long limit of the polarised direction of described feed and rectangular metal patch array or minor face are in angle of 45 degrees.
Distance between described ground plate and the partial reflection surface satisfies d=(1/2+n) λ
0, n=0,1,2..., condition of resonance, λ wherein
0Be the electromagnetic free space wavelength of centre frequency.
When the long limit of the polarization of electromagnetic wave direction of feed institute radiation and rectangular metal paster or minor face in angle of 45 degrees the time, by selecting the suitable length and width reflected phase will frequency response on adjusting portion sub reflector surface recently of rectangular metal paster, can realize line polarization wave with the feed radiation be transformed to vertical with it line polarization wave promptly ' linear polarization-quadrature linear polarization ' conversion or line polarization wave is transformed to the i.e. conversion of ' linear polarization-circular polarization ' of circularly polarised wave, realize high-gain simultaneously.
Described feed is made of half-wave dipole or its modification structures.
Beneficial effect: compare with existing polarization conversion antenna, high-gain polarization conversion antenna of the present utility model has been exempted the burden that loads polarizer in the conventional polar conversion antenna, and longitudinal size is little, and structure is simpler; Next need not any feeder network, does not need to adopt array structure can realize high-gain.The utility model constitutes resonant cavity by ground plate and the partial reflection parallel with ground plate surface are common, utilize resonance characteristic to make and need not adopt array structure, do not need the feeder network of complexity, under less longitudinal size, the gain of antenna can be significantly improved.Because the polarised direction of feed and the long limit of rectangular metal paster or minor face are in angle of 45 degrees, i.e. the electromagnetic wave of feed radiation always can be decomposed into the electromagnetic wave of two polarization orthogonal, and its direction is parallel to the long limit and the minor face of rectangular metal paster respectively.The partial reflection surface that is made of the rectangular metal patch array constitutes resonant cavity with ground plate on the one hand, on the other hand, provides reflected phase will suitable between the electromagnetic wave of polarization quadrature poor.By selecting the suitable length and width reflected phase will frequency response on adjusting portion sub reflector surface recently of rectangular metal paster, can realize line polarization wave with the feed radiation be transformed to vertical with it line polarization wave promptly ' linear polarization-quadrature linear polarization ' conversion or line polarization wave is transformed to the i.e. conversion of ' linear polarization-circular polarization ' of circularly polarised wave.
At last, in high-gain polarization conversion antenna of the present utility model, when the polarization orientation of feed is parallel to the long limit of paster or minor face, will not produce polarization conversion, promptly the polarization of electromagnetic wave direction of aerial radiation is identical with the polarised direction of feed.Therefore can realize polarization control in real time by the rotation feed according to the requirement in the practical application.
Description of drawings
Fig. 1 is the end view of the general structure of the high-gain polarization conversion antenna that provides of the utility model;
Fig. 2 is the structural representation on partial reflection surface among Fig. 1 of the present utility model.
Have among the above figure: feed 1, resonant cavity 2, ground plate 21, time medium substrate 22, rectangular metal paster 23, partial reflection surface 24, last medium substrate 25, gap 26, securing member 27.P
XBe the Cycle Length of partial reflection surface period unit along the x direction, P
yBe the Cycle Length of partial reflection surface period unit along the y direction.l
xBe the length of rectangular metal paster, l
yWidth for the rectangular metal paster.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
A kind of high-gain polarization conversion antenna that the utility model provides is made up of feed resonant cavity unit two parts.Resonant cavity applies the following medium substrate of ground plate by the back of the body and the last medium substrate on the partial reflection surface that the parallel with it deposited rectangular metal patch array of the back of the body constitutes constitutes jointly.The rectangular metal patch array is made of along the long limit and the short side direction periodic arrangement of rectangle respectively the rectangular metal paster.And along the long limit of rectangle and the Cycle Length P of short side direction
XWith P
yNot etc.The Cycle Length P of short side direction
yCycle Length P less than long side direction
XThe Cycle Length P of long side direction
XBe 0.1～0.2 times of the free space wavelength of design center frequency.Distance between ground plate and the partial reflection surface satisfies d=(1/2+n) λ
0, n=0,1,2..., wherein λ
0Be the electromagnetic free space wavelength of centre frequency.Described feed is made of half-wave dipole or its modification structures.When the long limit of the polarization of electromagnetic wave direction of feed institute radiation and rectangular metal paster in angle of 45 degrees, by selecting the suitable length and width reflected phase will frequency response on adjusting portion sub reflector surface recently of rectangular metal paster, can realize the line polarization wave of feed radiation is transformed to vertical with it line polarization wave, promptly become the line polarization wave of-45 degree angles with the long limit of rectangular metal paster, promptly realize the conversion of ' linear polarization-quadrature linear polarization ' or line polarization wave has been transformed to the i.e. conversion of ' linear polarization-circular polarization ' of circularly polarised wave, realized high-gain simultaneously.
Referring to Fig. 1 and Fig. 2, the disposable high-gain resonant antenna of polarization provided by the invention, comprise feed 1 resonant cavity 2 two parts, resonant cavity 2 applies the following medium substrate 22 of ground plate 21 by the back of the body and the last medium substrate 25 on the partial reflection surface 24 that parallel with it deposited rectangular metal paster 23 arrays of the back of the body constitute constitutes jointly, distance between ground plate 21 and the partial reflection surface 24 satisfies d=(1/2+n) λ
0, n=0,1, the condition of resonance of 2....Last medium substrate 25 links to each other by securing member 27 with following medium substrate 22.
Constitute along the long limit and the short side direction periodic arrangement of rectangle respectively by rectangular metal paster 23 referring to Fig. 2 partial reflection surface.And do not wait along the long limit of rectangle and the Cycle Length of short side direction.The Cycle Length of short side direction is less than the Cycle Length of long side direction.
But the utility model continuation is contained: when the polarization of electromagnetic wave of feed radiation is oriented to a left side/right circular polarization, by regulating the suitable length and width reflected phase will frequency response on adjusting portion sub reflector surface recently of rectangular metal paster, can realize a left side/right circular polarization with the feed radiation be transformed to the right side of quadrature/left circularly polarised wave with it promptly ' left side/right circular polarization-right side/left circular polarization ' conversion or a left side/right circularly polarised wave is transformed to the conversion that line polarization wave is ' circular polarization-linear polarization ', realize high-gain simultaneously.
Be convenient to illustrate the design process of each structural parameters, below explain, but this be not based on given structural parameters
Lose general.Given parameter: the long l of rectangular metal paster 23
x=5.1mm, wide l
y=2.5mm is along the Cycle Length P of long limit x direction
X=7.1mm is along the Cycle Length P of minor face y direction
y=3.6mm.Feed is arranged in resonant cavity, and the distance of leaving down the upper surface of medium substrate is 3mm.Central task frequency f=14GHz.Distance between ground plate 21 and the partial reflection surface 24 is 11mm, satisfies:
λ wherein
0Be the electromagnetic free space wavelength of centre frequency.
Claims (6)
1. high-gain polarization conversion antenna, form by feed resonant cavity two parts, feed is arranged in resonant cavity, the top that it is characterized in that resonant cavity is last medium substrate (25), the bottom is following medium substrate (22), the two is connected and fixed by securing member (27), is provided with gap (26) between last medium substrate (25) and the following medium substrate (22), is provided with rectangular metal patch array (23) component part reflecting surface (24) at the lower surface of last medium substrate (25); Lower surface at following medium substrate (22) is provided with ground plate (21).
2. high-gain polarization conversion antenna according to claim 1 is characterized in that: described partial reflection surface (24) is made of rectangular metal patch array (23).
3. high-gain polarization conversion antenna according to claim 1, it is characterized in that: described rectangular metal patch array (23), constitute along the long limit and the short side direction periodic arrangement of rectangle respectively by the rectangular metal paster, and do not wait along the long limit of rectangle and the Cycle Length of short side direction, the Cycle Length of short side direction is less than the Cycle Length of long side direction.
4. high-gain polarization conversion antenna according to claim 1 is characterized in that: described feed (1) is made of half-wave dipole or its modification structures.
5. high-gain polarization conversion antenna according to claim 1 is characterized in that: the long limit of the polarised direction of described feed (1) and rectangular metal patch array (23) or minor face are in angle of 45 degrees.
6. high-gain polarization conversion antenna according to claim 1 is characterized in that: the distance between described ground plate (21) and partial reflection surface (24) satisfies d=(1/2+n) λ
0, n=0,1,2..., condition of resonance, λ wherein
0Be the electromagnetic free space wavelength of centre frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200225125U CN201584500U (en) | 2010-01-13 | 2010-01-13 | High-gain polarized alternating antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200225125U CN201584500U (en) | 2010-01-13 | 2010-01-13 | High-gain polarized alternating antenna |
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| Publication Number | Publication Date |
|---|---|
| CN201584500U true CN201584500U (en) | 2010-09-15 |
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ID=42726513
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200225125U Expired - Fee Related CN201584500U (en) | 2010-01-13 | 2010-01-13 | High-gain polarized alternating antenna |
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| Country | Link |
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| CN (1) | CN201584500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752671B (en) * | 2010-01-13 | 2012-11-28 | 东南大学 | High-gain resonant antenna capable of realizing polarization change |
| CN107317102A (en) * | 2017-05-26 | 2017-11-03 | 上海无线电设备研究所 | A kind of integrated high-gain band cover antenna coupled system and its design method |
-
2010
- 2010-01-13 CN CN2010200225125U patent/CN201584500U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752671B (en) * | 2010-01-13 | 2012-11-28 | 东南大学 | High-gain resonant antenna capable of realizing polarization change |
| CN107317102A (en) * | 2017-05-26 | 2017-11-03 | 上海无线电设备研究所 | A kind of integrated high-gain band cover antenna coupled system and its design method |
| CN107317102B (en) * | 2017-05-26 | 2020-02-21 | 上海无线电设备研究所 | Integrated high-gain antenna coupling system with cover and design method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20140113 |