CN210137010U - Multi-radiation-mode resonant antenna - Google Patents
Multi-radiation-mode resonant antenna Download PDFInfo
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- CN210137010U CN210137010U CN201921490434.9U CN201921490434U CN210137010U CN 210137010 U CN210137010 U CN 210137010U CN 201921490434 U CN201921490434 U CN 201921490434U CN 210137010 U CN210137010 U CN 210137010U
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- 239000000758 substrate Substances 0.000 claims abstract description 15
- 230000005284 excitation Effects 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Abstract
The utility model discloses a multi-radiation-mode resonant antenna, which comprises a dielectric substrate and an antenna structure coated on the upper surface of the dielectric substrate, wherein the dielectric substrate corresponds to the antenna structure in size up and down; the antenna structure comprises a linear antenna, wherein a first branch, a second branch and a third branch which are perpendicular to the linear antenna are arranged on one side of the linear antenna, the first branch is located at the middle line position of the linear antenna, the length of the first branch is longer than that of the second branch and that of the third branch, the second branch and the third branch are symmetrically arranged on two sides of the first branch, the shapes and the sizes of the second branch and the third branch are consistent, and a feed port is arranged between the joint of the second branch and the linear antenna and the end closest to the joint of the second branch and the linear antenna. Firstly, the antenna can excite possible modes in the radiator, not only excites odd orders and inhibits even orders, but also greatly improves the bandwidth of a broadband; secondly, the antenna not only has relatively stable omnidirectional radiation performance, but also can keep higher gain effect.
Description
Technical Field
The utility model belongs to the technical field of wireless communication and specifically relates to a many radiation mode resonant antenna is related to.
Background
The history of the multi-radiation mode antenna can trace back to 40 years in the 20 th century, but the multi-radiation mode antenna is not applied to practical design because of limited numerical algorithms and simulation software at the time. The traditional antenna design idea is based on 'single radiator, single mode', and most of the existing antenna designs are based on the idea. With the development of antenna theory and technology and the maturity of electromagnetic simulation software, people pay more and more attention to the design method of complex antennas and antenna systems. In recent years, the concept of multiple radiation modes, namely 'single radiator and multiple mode' has attracted attention. By utilizing the thought, the broadband antenna can be quickly designed to meet the requirements of the modern wireless communication system.
In general, for designing a narrow slot antenna, a single radiator radiates a single mode, and the relative bandwidth of the antenna is not ideal. In order to maintain the narrow slot characteristic and significantly enhance the bandwidth thereof, it is common to introduce additional non-radiating resonances along the feed line portion through a parasitic radiator, and various broadband slot antennas have been proposed and designed by using a virtual short concept, introducing a parasitic via and utilizing a multiple radiation mode concept. In past studies, researchers have proposed a novel and simple antenna configuration by exciting multiple modes in a single narrow slot. Two slot roots are symmetrically introduced near the zero point of the electric field distribution of the second order odd mode in the slot of the center feed, and under the disturbance of two short-cut slots, the second odd mode is gradually combined with the first odd mode to generate broadband radiation with two resonances. Studies have shown that the relative bandwidth of the proposed prior art slot antenna can be effectively increased while maintaining the inherent narrow slot structure.
The inventor designs a broadband dipole three-dimensional structure antenna by utilizing a single-radiator multi-mode concept, symmetrically introduces a pair of short truncated columns near the zero point of the second odd-order mode electric field distribution, excites two modes in a dipole cavity of center feed, and utilizes the symmetrical short truncated columns for disturbance, so that the second odd-order mode can be moved to the position corresponding to the first odd-order mode, a resonance effect is generated, and the radiation bandwidth of the broadband dipole three-dimensional structure antenna is obviously enhanced. At present, most researches on the design idea and the method only stimulate an odd-order mode and inhibit an even-order mode.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the deficiency of the background art, the utility model discloses a through the many radiation mode resonant antenna of bias feed excitation odd mode, even mode form simultaneously.
The technical scheme is as follows: the utility model discloses a multi-radiation-mode resonant antenna, which comprises a dielectric substrate and an antenna structure coated on the upper surface of the dielectric substrate, wherein the dielectric substrate corresponds to the antenna structure in size up and down;
the antenna structure comprises a linear antenna, wherein a first branch, a second branch and a third branch which are perpendicular to the linear antenna are arranged on one side of the linear antenna, the first branch is located at the middle line position of the linear antenna, the length of the first branch is longer than that of the second branch and that of the third branch, the second branch and the third branch are symmetrically arranged on two sides of the first branch, the shapes and the sizes of the second branch and the third branch are consistent, and a feed port is arranged between the joint of the second branch and the linear antenna and the end closest to the joint of the second branch and the linear antenna.
The feed port is a broken section, and two sides of the broken section are respectively connected with the anode and the cathode of the power supply through setting current source excitation.
The current source excitation is carried out at the position, close to the end, of the linear antenna, the modes possibly existing in the antenna can be excited at the same time, the odd mode and the even mode are included, three branches are added to one side of the linear antenna, the existing modes are disturbed and combined, the original narrow frequency band can be widened, and therefore the broadband antenna is formed.
The cross section is 3mm wide and 8mm away from the close end, and the impedance of the current source excitation port is 75 omega.
Further, the width of the first branch, the width of the second branch and the width of the third branch are consistent with the width of the linear antenna and are 6.5mm, the length of the linear antenna is 82mm, the length of the second branch and the length of the third branch are 20mm, the distance between each branch and the end part closest to the branch is 15mm, and the length of the first branch is 30 mm.
In order to further improve the overall performance of the antenna, a structure with two side branches is provided, a fourth branch, a fifth branch and a sixth branch are arranged on the other side of the linear antenna, the fourth branch, the fifth branch and the sixth branch are perpendicular to the linear antenna, the fourth branch and the first branch are symmetrical about the linear antenna, and the fifth branch and the sixth branch are symmetrically arranged on two sides of the fourth branch. Therefore, the antenna matching degree is better, and the overall performance is better.
Further, the length of the linear antenna is 82mm, the width of the linear antenna is 6mm, the widths of the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch are consistent and are 7.5mm, the lengths of the first branch and the fourth branch are 28mm, the lengths of the second branch and the third branch are 16mm, the distance between each branch and the nearest end of the second branch is 15mm, the lengths of the fifth branch and the sixth branch are 20mm, and the distance between each branch and the nearest end of the fifth branch is 14 mm.
Furthermore, the dielectric substrate adopts RogersR04003 with the dielectric constant of 3.55 and the loss angle of 0.0027. The height is 0.813 mm.
The antenna structure is made of copper.
Has the advantages that: compared with the prior art, the utility model has the advantages that: firstly, the antenna can excite possible modes in the radiator, not only excites odd orders and inhibits even orders, but also greatly improves the bandwidth of a broadband; secondly, the antenna not only has relatively stable omnidirectional radiation performance, but also can keep higher gain effect; finally, the antenna has simple structure and convenient manufacture, can be stably used in WLAN communication, and can cover the high-frequency part of the ultra-wideband antenna (3.1-10.6 GHz).
Drawings
Fig. 1 is a schematic plan view of the antenna structure of the present invention;
fig. 2 is a schematic diagram of the plane structure of the prototype antenna of the present invention;
fig. 3 is a return loss simulation result diagram of the prototype antenna of the present invention;
fig. 4 is a return loss simulation result diagram of the antenna of the present invention;
fig. 5, 6 and 7 are E-plane and H-plane radiation patterns of the antennas of the present invention at 4GHz, 5.4GHz and 8.4GHz, respectively;
fig. 8 is a graph of the antenna peak gain of the present invention;
fig. 9 is a schematic structural view of the antenna of the present invention after improvement;
fig. 10 is a graph of the return loss simulation result after the antenna of the present invention is improved;
fig. 11, fig. 12, and fig. 13 are respectively E-plane and H-plane radiation patterns of 5.4GHz, 6GHz, and 8.4GHz after the antenna of the present invention is improved;
fig. 14 is a peak gain diagram after the antenna of the present invention is improved.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
The multi-radiation-mode resonant antenna shown in fig. 1 includes a dielectric substrate and an antenna structure coated on the upper surface of the dielectric substrate, wherein the size of the dielectric substrate depends on the size of the antenna planar structure, and corresponds to the size of the antenna structure.
The dielectric substrate used was Rogers R04003, the dielectric constant was 3.55, the loss angle was 0.0027, the height was 0.813mm, and the antenna structure was copper.
The antenna structure comprises a linear antenna 1, wherein a first branch 101, a second branch 102 and a third branch 103 which are perpendicular to the linear antenna 1 are arranged on one side of the linear antenna 1, the first branch is located at the middle line position of the linear antenna 1, the length of the first branch is longer than that of the second branch 102 and that of the third branch 103, the second branch 102 and the third branch 103 are symmetrically arranged on two sides of the first branch 101, the shapes and the sizes of the second branch 102 and the third branch are consistent, and a feed port 2 is arranged between the connection position of the second branch 102 and the linear antenna 1 and the end part closest to the connection position of the second branch 102 and the linear antenna 1. The feed port 2 is a broken section, and two sides of the broken section are respectively connected with the anode and the cathode of the power supply by setting current source excitation. The cross section is 3mm wide and 8mm away from the close end, and the impedance of the current source excitation port is 75 omega.
The linear antenna 1 is a prototype antenna of the present antenna, and In documents w.lu and l.zhu, "wide band and dipolerant using multi-mode response concept" In International Journal of microwave and Wireless Technologies,2017,9(2),365 and 371 ", the odd mode can be excited and the even mode can be suppressed by center feeding, as shown In fig. 2, In the present invention, a current source with a port impedance of 75 Ω is directly excited, and CM1\ CM2\ CM3\ CM4\ CM5 can be excited In the three-dimensional structure of the linear antenna at the same time. The return loss of the prototype antenna Hfss simulation is shown in fig. 3, where each resonance point corresponds to each mode in fig. 3.
The addition of the first, second and third branches 101, 102, 103 to the linear antenna 1 can disturb the odd-even mode, so that the resonance point shifts and the resonant tank increases, thereby increasing the bandwidth.
Determining the length and the corresponding position of each branch through Hfss simulation, wherein the widths of the first branch 101, the second branch 102 and the third branch 103 are consistent with the width of the linear antenna 1 and are 6.5mm, the length of the linear antenna 1 is 82mm, the lengths of the second branch 102 and the third branch 103 are 20mm, the distance between each branch and the nearest end of each branch is 15mm, and the length of the first branch 101 is 30 mm.
The effect produced by the antenna shown in fig. 1 is shown in fig. 4, 5, 6, 7.
Wherein, fig. 4 is a return loss diagram, and it can be seen from the diagram that the bandwidth range of the antenna is 3.58Ghz-9.05Ghz, and compared with the antenna In the document "w.lu and l.zhu," Wideband two antenna using multi-mode resonanceception "In International Journal of Microwave and Wireless Technologies,2017,9(2), 365-. As shown in fig. 5, 6 and 7, which show the radiation patterns of the antenna at the center frequencies of 4GHz, 5.4GHz and 8.4GHz, it can be seen that the radiation performance of the antenna is not superior to that of the prior art antenna, and the radiation effect is not ideal.
As shown in fig. 9, in order to further improve the overall performance of the antenna, a structure is proposed in which a double-side branch is added, that is, a fourth branch 104, a fifth branch 105, and a sixth branch 106 are provided on the other side of the linear antenna 1, the fourth branch 104 and the first branch 101 are symmetrical with respect to the linear antenna 1, and the fifth branch 105 and the sixth branch 106 are symmetrically provided on both sides of the fourth branch 104.
The matching degree is improved through further optimization of Hfss, after optimization, the length of the linear antenna 1 is 82mm, the width of the linear antenna is 6mm, the widths of the first branch 101, the second branch 102, the third branch 103, the fourth branch 104, the fifth branch 105 and the sixth branch 106 are consistent and are 7.5mm, the lengths of the first branch 101 and the fourth branch 104 are 28mm, the lengths of the second branch 102 and the third branch 103 are 16mm, the distance between each branch and the end closest to the branch is 15mm, the lengths of the fifth branch 105 and the sixth branch 106 are 20mm, and the distance between each branch and the end closest to the branch is 14 mm. The upper and lower branches are staggered by 1mm, so that the purpose of the method is to enable the antenna to have better matching degree and better overall performance. Fig. 10 shows the simulation result of return loss of the improved antenna.
As shown in fig. 11, 12 and 13, which are radiation patterns of the center frequencies of the improved antenna, i.e., 5.4GHz, 6GHz and 8.4GHz, respectively, it can be seen from fig. 11 that the improved antenna has relatively stable omnidirectional radiation performance in a relatively low frequency band range in the whole frequency band range. Fig. 12 and 13 show that the improved antenna still has a certain stable radiation performance in the high frequency band. Fig. 14 is a radiation gain diagram of the improved antenna, in which the gain is greater than 4db in the improved radiation performance, that is, the improved structure not only makes the radiation pattern more ideal, but also can maintain the higher gain effect.
Claims (8)
1. A multi-radiation-mode resonant antenna, characterized in that: the antenna comprises a dielectric substrate and an antenna structure coated on the upper surface of the dielectric substrate, wherein the dielectric substrate and the antenna structure are vertically corresponding in size;
the antenna structure comprises a linear antenna (1), wherein a first branch (101), a second branch (102) and a third branch (103) which are perpendicular to the linear antenna are arranged on one side of the linear antenna (1), the first branch is located at the middle line position of the linear antenna (1), the length of the first branch is longer than that of the second branch (102) and that of the third branch (103), the second branch (102) and the third branch (103) are symmetrically arranged on two sides of the first branch (101), the shapes and the sizes of the second branch and the third branch are consistent, and a feed port (2) is arranged between the connection position of the second branch (102) and the linear antenna (1) and the end part which is closest to the connection position.
2. The multi-radiation-mode resonant antenna of claim 1, wherein: the feed port (2) is a broken section, and two sides of the broken section are respectively connected with the anode and the cathode of the power supply through setting current source excitation.
3. The multi-radiation-mode resonant antenna of claim 2, wherein: the cross section is 3mm wide and 8mm away from the close end, and the impedance of the current source excitation port is 75 omega.
4. The multi-radiation-mode resonant antenna of claim 1, wherein: the width of the first branch (101), the width of the second branch (102) and the width of the third branch (103) are consistent with the width of the linear antenna (1) and are 6.5mm, the length of the linear antenna (1) is 82mm, the length of the second branch (102) and the length of the third branch (103) are 20mm, the distance between each branch and the end closest to the branch is 15mm, and the length of the first branch (101) is 30 mm.
5. The multi-radiation-mode resonant antenna of claim 1, wherein: the other side of the linear antenna (1) is provided with a fourth branch (104), a fifth branch (105) and a sixth branch (106) which are perpendicular to the other side of the linear antenna (1), the fourth branch (104) and the first branch (101) are symmetrical about the linear antenna (1), and the fifth branch (105) and the sixth branch (106) are symmetrically arranged on two sides of the fourth branch (104).
6. The multi-radiation-mode resonant antenna of claim 5, wherein: the length of linear antenna (1) is 82mm, and the width is 6mm, the width of first minor matters (101), second minor matters (102), third minor matters (103), fourth minor matters (104), fifth minor matters (105) and sixth minor matters (106) is unanimous, is 7.5mm, first minor matters (101) and fourth minor matters (104) are 28mm long, the length of second minor matters (102) and third minor matters (103) is 16mm, and distance 15mm between respective and its nearest tip, the length of fifth minor matters (105) and sixth minor matters (106) is 20mm, and distance 14mm between respective and its nearest tip.
7. The multi-radiation-mode resonant antenna of claim 1, wherein: the dielectric substrate adopts Rogers R04003 with the dielectric constant of 3.55 and the loss angle of 0.0027.
8. The multi-radiation-mode resonant antenna of claim 1, wherein: the antenna structure is made of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921490434.9U CN210137010U (en) | 2019-09-09 | 2019-09-09 | Multi-radiation-mode resonant antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921490434.9U CN210137010U (en) | 2019-09-09 | 2019-09-09 | Multi-radiation-mode resonant antenna |
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| CN210137010U true CN210137010U (en) | 2020-03-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518349A (en) * | 2019-09-09 | 2019-11-29 | 南京信息工程大学 | A kind of more radiation mode resonant antennas |
| CN114300853A (en) * | 2021-12-28 | 2022-04-08 | 西安理工大学 | Broadband high-gain antenna array based on super-structure surface |
| CN114336021A (en) * | 2021-12-28 | 2022-04-12 | 西安理工大学 | Broadband circularly polarized substrate integrated waveguide resonant cavity antenna array |
| CN114336023A (en) * | 2021-12-28 | 2022-04-12 | 西安理工大学 | Broadband high-gain substrate integrated waveguide resonant cavity antenna |
-
2019
- 2019-09-09 CN CN201921490434.9U patent/CN210137010U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518349A (en) * | 2019-09-09 | 2019-11-29 | 南京信息工程大学 | A kind of more radiation mode resonant antennas |
| CN110518349B (en) * | 2019-09-09 | 2024-03-26 | 南京信息工程大学 | Multi-radiation-mode resonant antenna |
| CN114300853A (en) * | 2021-12-28 | 2022-04-08 | 西安理工大学 | Broadband high-gain antenna array based on super-structure surface |
| CN114336021A (en) * | 2021-12-28 | 2022-04-12 | 西安理工大学 | Broadband circularly polarized substrate integrated waveguide resonant cavity antenna array |
| CN114336023A (en) * | 2021-12-28 | 2022-04-12 | 西安理工大学 | Broadband high-gain substrate integrated waveguide resonant cavity antenna |
| CN114336023B (en) * | 2021-12-28 | 2024-05-28 | 西安理工大学 | Broadband high-gain substrate integrated waveguide resonant cavity antenna |
| CN114300853B (en) * | 2021-12-28 | 2024-05-28 | 西安理工大学 | Wideband high-gain antenna array based on super-structured surface |
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Granted publication date: 20200310 |