CN203747043U - Circularly-polarized high-gain low-profile resonant antenna - Google Patents
Circularly-polarized high-gain low-profile resonant antenna Download PDFInfo
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- CN203747043U CN203747043U CN201420007603.XU CN201420007603U CN203747043U CN 203747043 U CN203747043 U CN 203747043U CN 201420007603 U CN201420007603 U CN 201420007603U CN 203747043 U CN203747043 U CN 203747043U
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- gain
- resonant antenna
- rectangular metal
- orthogonal directions
- low section
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- 239000002184 metal Substances 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims abstract description 14
- 230000010287 polarization Effects 0.000 claims description 32
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000004044 response Effects 0.000 description 8
- 230000005855 radiation Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model discloses a circularly-polarized high-gain low-profile resonant antenna comprising a resonant cavity and a linearly-polarized feed source located in the resonant cavity. The resonant cavity comprises a metal plate and a dielectric substrate which are arranged in a parallel manner. The metal plate is periodically provided with a plurality of cross slits to form a partially-reflective surface in two orthogonal directions. The upper surface of the dielectric substrate which is opposite to the metal plate is periodically provided with a plurality of rectangular metal patches to form an artificial magnetic conductor in two orthogonal directions. The lower surface of the dielectric substrate is provided with an earth plate. The metal plate, the dielectric substrate and the earth plate are connected and fixed through fasteners. The circularly-polarized high-gain low-profile resonant antenna provided in the utility model can be used to solve the problem of complex feed and the problem that the antenna performance is influenced by unit mutual coupling because the feed network and unit array mode is adopted with existing high-gain circularly-polarized antennas.
Description
Technical field
The utility model relates to a kind of high-gain aerial, relates in particular to a kind of low section resonant antenna of high-gain of circular polarization.
Background technology
The circular polarized antenna of higher gain need to be used conventionally in the field such as modern radar, satellite communication.Conventionally need to adopt feeding network to realize amplitude and the phase condition of circular polarization.On the other hand, conventionally adopt the mode of unit group battle array in order to realize higher gain, the problem of therefore bringing is mutual coupling between feed complexity and the unit impact on antenna performance.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of high-gain of circular polarization low section resonant antenna, solve the mode that existing high-gain circular polarized antenna adopts feeding network and unit group battle array, brought the problem of the mutual coupling antenna performance between feed complexity and unit.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of low section resonant antenna of high-gain of circular polarization, the linear polarization feed that comprises resonant cavity and be arranged in resonant cavity, described resonant cavity comprises metallic plate and the medium substrate being arranged in parallel, on two orthogonal directions of metallic plate, the cycle arranges some crosss gap component part reflecting surface, on two orthogonal directions of the medium substrate upper surface relative with metallic plate, the cycle arranges some rectangular metal pasters formation artificial magnetic conductors, lower surface at medium substrate arranges ground plate, and described metallic plate, medium substrate and ground plate are connected and fixed by securing member.
The Cycle Length of the cross gap of described component part reflecting surface on two orthogonal directions equates; The length in two quadrature gaps in described formation cross gap is unequal, and width equates.
Not etc., the Cycle Length of rectangular metal paster short side direction is not less than the Cycle Length of long side direction to the Cycle Length of the rectangular metal paster of described formation artificial magnetic conductor on two orthogonal directions.
The long limit of the polarised direction of described linear polarization feed and rectangular metal paster or short side direction angle at 45 °.
Distance between described ground plate and part reflecting surface meets d=(1/4+n/2) λ
0condition, λ wherein
0centered by the electromagnetic free space wavelength of frequency, n=0,1,2....
The beneficial effects of the utility model: 1, the utility model is compared the feeding network of having exempted conventional circular polarization antenna with existing circular polarized antenna, and longitudinal size is little, and structure is simpler, 2, the utility model forms resonant cavity by part reflecting surface and the artificial magnetic conductor parallel with part reflecting surface, utilizes resonance characteristic to make not need to adopt array structure, and gain can be significantly improved, 3, the long limit of the polarised direction of linear polarization feed of the present utility model and rectangular metal paster or short side direction are in angle of 45 degrees, the electromagnetic wave that is the radiation of linear polarization feed always can be decomposed into the electromagnetic wave of two polarization orthogonal, its direction is parallel to respectively long limit and the minor face of rectangular metal paster, together with the artificial magnetic conductor that the part reflecting surface consisting of cross gap forms with rectangular metal paster, form resonant cavity, both provide respectively reflected phase will suitable between the electromagnetic wave of two polarization orthogonal poor, can be by regulating cross metal slit to carry out the reflected phase will frequency response on adjusting portion sub reflector surface along the length on two-dimensional direction, by regulating the long limit of rectangular metal paster and the reflected phase will frequency response that bond length regulates artificial magnetic conductor, realization is transformed to circularly polarised wave by line polarization wave, realize low section and high-gain simultaneously.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present utility model.
Fig. 2 is end view of the present utility model.
Fig. 3 is the structural representation of part reflecting surface of the present utility model.
Fig. 4 is the structural representation of part reflecting surface periodic unit of the present utility model.
Fig. 5 is the structural representation of artificial magnetic conductor of the present utility model.
Fig. 6 is the structural representation of artificial magnetic conductor periodic unit of the present utility model.
Fig. 7 is the position view of linear polarization feed.
Fig. 8 is reflection coefficient chart of the present utility model.
Fig. 9 is axial ratio frequency response curve figure of the present utility model.
Figure 10 is gain frequency response curve figure of the present utility model.
Figure 11 is horizontal radiation pattern of the present utility model.
Figure 12 is elevation radiation patytern of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As Fig. 1, 2, shown in 3 and 5, a kind of low section resonant antenna of high-gain of circular polarization, the linear polarization feed 1 that comprises resonant cavity 2 and be arranged in resonant cavity 2, described resonant cavity 2 comprises metallic plate 22 and the medium substrate 21 being arranged in parallel, on two orthogonal directions of metallic plate 22, the cycle arranges some crosss gap 23 component part reflecting surfaces, on two orthogonal directions of medium substrate 21 upper surfaces relative with metallic plate 22, the cycle arranges some rectangular metal pasters 24 formation artificial magnetic conductors, lower surface at medium substrate 21 arranges ground plate 25, distance between ground plate 25 and part reflecting surface meets d=(1/4+n/2) λ
0condition, λ wherein
0centered by the electromagnetic free space wavelength of frequency, n=0,1,2..., described metallic plate 22, medium substrate 21 and ground plate 25 are connected and fixed by securing member 26.
As shown in Figure 4, the Cycle Length of the cross gap 23 of described component part reflecting surface on two orthogonal directions equates, is P, and the length that forms two quadrature gaps in cross gap 23 is respectively S
xand S
y, width is S
w, and gap length is unequal.
As shown in Figure 6, the Cycle Length of the rectangular metal paster 24 of described formation artificial magnetic conductor on two orthogonal directions not etc., the Cycle Length P of rectangular metal paster 24 short side directions
ybe less than the Cycle Length P of long side direction
x, P wherein
xcentered by 0.2～0.3 times of the electromagnetic free space wavelength of frequency, the long limit of rectangular metal paster 24 and the length of minor face are respectively l
xand l
y.
The polarised direction of the linear polarization feed 1 of above-described resonant antenna and the long limit of rectangular metal paster 24 or short side direction angle at 45 °, the electromagnetic wave that is the radiation of linear polarization feed always can be decomposed into the electromagnetic wave of two polarization orthogonal, its direction is parallel to respectively long limit and the minor face of rectangular metal paster 24, together with the artificial magnetic conductor that the part reflecting surface consisting of cross gap 23 forms with rectangular metal paster 24, form resonant cavity 2, both provide respectively reflected phase will suitable between the electromagnetic wave of two polarization orthogonal poor, can be by regulating cross gap 23 to carry out the reflected phase will frequency response on adjusting portion sub reflector surface along the length on two-dimensional direction, by regulating the long limit of rectangular metal paster 24 and the reflected phase will frequency response that bond length regulates artificial magnetic conductor, realization is transformed to circularly polarised wave by line polarization wave, realize low section and high-gain simultaneously.
The design process of each structural parameters for convenience of explanation, given structural parameters: the l of rectangular metal paster 24
x=4mm, l
y=2.5mm, along the Cycle Length P of long side direction
x=5mm, along the Cycle Length P of short side direction
y=3.6mm, the Cycle Length P=11mm in cross gap 23, S
x=10.5mm, S
y=7.2mm, stitches wide S
w=2mm, centre frequency f=14GHz, the distance 5.5mm between ground plate 25 and part reflecting surface, meets:
λ wherein
0centered by the electromagnetic free space wavelength of frequency.Select simulation software as the Microwave Studio CSTDeng high frequency simulation software of the HFSS of Ansoft company, CST company, analog simulation obtains on computers: the horizontal radiation pattern shown in gain frequency response curve figure, the Figure 11 shown in reflection coefficient chart as shown in Figure 8, axial ratio frequency response curve figure, the Figure 10 shown in Fig. 9, the elevation radiation patytern shown in Figure 12.Change structure parameter under the tangible specified criteria of curve more than obtaining, obtains, if also can obtain similar curve.
For ease of circular polarization linear polarization feed 1 of the present utility model, can be formed by microband paste or its modification structures, the linear polarization feed 1 of this structure is fitted in the upper surface of the medium substrate 21 relative with metallic plate 22, remaining place of medium substrate 21 upper surfaces is along long limit and the some rectangular metal pasters 24 of short side direction periodic arrangement of rectangle, as shown in Figure 7.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. the low section resonant antenna of the high-gain of a circular polarization, it is characterized in that: the linear polarization feed (1) that comprises resonant cavity (2) and be arranged in resonant cavity (2), described resonant cavity (2) comprises metallic plate (22) and the medium substrate (21) being arranged in parallel, on two orthogonal directions of metallic plate (22), the cycle arranges some crosss gap (23) component part reflecting surface, on two orthogonal directions of medium substrate (21) upper surface relative with metallic plate (22), the cycle arranges some rectangular metal pasters (24) formation artificial magnetic conductor, lower surface at medium substrate (21) arranges ground plate (25), described metallic plate (22), medium substrate (21) and ground plate (25) are connected and fixed by securing member (26).
2. the low section resonant antenna of the high-gain of a kind of circular polarization according to claim 1, is characterized in that: the Cycle Length of the cross gap (23) of described component part reflecting surface on two orthogonal directions equates.
3. the low section resonant antenna of the high-gain of a kind of circular polarization according to claim 2, is characterized in that: the length in two quadrature gaps in described formation cross gap (23) is unequal, and width equates.
4. the low section resonant antenna of the high-gain of a kind of circular polarization according to claim 1, it is characterized in that: not etc., the Cycle Length of rectangular metal paster (24) short side direction is not less than the Cycle Length of long side direction to the Cycle Length of the rectangular metal paster (24) of described formation artificial magnetic conductor on two orthogonal directions.
5. according to the low section resonant antenna of the high-gain of a kind of circular polarization described in claim 1 or 4, it is characterized in that: the long limit of the polarised direction of described linear polarization feed (1) and rectangular metal paster (24) or short side direction angle at 45 °.
6. the low section resonant antenna of the high-gain of a kind of circular polarization according to claim 1, is characterized in that: the distance between described ground plate (25) and part reflecting surface meets d=(1/4+n/2) λ
0condition, λ wherein
0centered by the electromagnetic free space wavelength of frequency, n=0,1,2....
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007603.XU CN203747043U (en) | 2014-01-07 | 2014-01-07 | Circularly-polarized high-gain low-profile resonant antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007603.XU CN203747043U (en) | 2014-01-07 | 2014-01-07 | Circularly-polarized high-gain low-profile resonant antenna |
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| Publication Number | Publication Date |
|---|---|
| CN203747043U true CN203747043U (en) | 2014-07-30 |
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ID=51346805
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420007603.XU Expired - Lifetime CN203747043U (en) | 2014-01-07 | 2014-01-07 | Circularly-polarized high-gain low-profile resonant antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730736A (en) * | 2014-01-07 | 2014-04-16 | 东南大学 | Circularly polarized high-gain and low-profile resonant antenna |
| CN104362435A (en) * | 2014-11-07 | 2015-02-18 | 西北工业大学 | Planar high-gain microstrip reflectarray antenna |
| CN108346859A (en) * | 2018-02-01 | 2018-07-31 | 东南大学 | A kind of small sized wide-band circular polarization microstrip antenna using artificial magnetic conductor |
| CN112366450A (en) * | 2020-10-30 | 2021-02-12 | 南京航空航天大学 | High-gain flexible liquid antenna |
-
2014
- 2014-01-07 CN CN201420007603.XU patent/CN203747043U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730736A (en) * | 2014-01-07 | 2014-04-16 | 东南大学 | Circularly polarized high-gain and low-profile resonant antenna |
| CN103730736B (en) * | 2014-01-07 | 2017-02-08 | 东南大学 | Circularly polarized high-gain and low-profile resonant antenna |
| CN104362435A (en) * | 2014-11-07 | 2015-02-18 | 西北工业大学 | Planar high-gain microstrip reflectarray antenna |
| CN104362435B (en) * | 2014-11-07 | 2017-06-23 | 西北工业大学 | A kind of plane high-gain microstrip reflection array antenna |
| CN108346859A (en) * | 2018-02-01 | 2018-07-31 | 东南大学 | A kind of small sized wide-band circular polarization microstrip antenna using artificial magnetic conductor |
| CN112366450A (en) * | 2020-10-30 | 2021-02-12 | 南京航空航天大学 | High-gain flexible liquid antenna |
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