CN115207607A - Low-coupling broadband radial line slot antenna - Google Patents
Low-coupling broadband radial line slot antenna Download PDFInfo
- Publication number
- CN115207607A CN115207607A CN202210814602.5A CN202210814602A CN115207607A CN 115207607 A CN115207607 A CN 115207607A CN 202210814602 A CN202210814602 A CN 202210814602A CN 115207607 A CN115207607 A CN 115207607A
- Authority
- CN
- China
- Prior art keywords
- low
- radial line
- metal
- slot antenna
- line slot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010168 coupling process Methods 0.000 title claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 28
- 239000000523 sample Substances 0.000 claims abstract description 14
- 238000010586 diagram Methods 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 40
- 238000012937 correction Methods 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000000191 radiation effect Effects 0.000 abstract description 2
- 230000010287 polarization Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
-
- 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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
Landscapes
- Waveguide Aerials (AREA)
Abstract
The invention relates to the technical field of wireless satellite communication, in particular to a low-coupling broadband radial line slot antenna, which adopts a method of corroding and carving a spiral line slot array on an upper layer, arranges the slot lengths in the front four circles according to Chebyshev distribution, corrects a directional diagram by optimizing the slot length of the last circle so as to obtain a better low-side lobe pencil-shaped directional diagram, ensures that the coupling between the adjacent slots is lowest and the slot intervals are more dense due to the fact that the interval between the adjacent slot units of the same circle layer is 0.5 lambdag, is beneficial to arranging more slots to increase the radiation effect, finally changes the depth of a coaxial probe inserted into a dielectric plate and the slot length of the last circle to adjust the input echo loss and the broadband resonance point of the antenna, and experimental data proves that the S11 at 11GHz-13.7GHz is less than-20 dB, the relative bandwidth of the low-coupling broadband radial line slot antenna exceeds 21.8 percent, and better broadband performance is realized.
Description
Technical Field
The invention relates to the technical field of wireless satellite communication, in particular to a low-coupling broadband radial line slot antenna.
Background
In applications such as small satellites, vehicle-mounted radars, airborne antennas, etc., it is desirable that the antenna have low sidelobe characteristics to suppress interference in non-main lobe ranges. The receiving antenna with high Ku wave band frequency, wide frequency band, large signal capacity and smaller required aperture can obtain satisfactory image quality, thereby effectively reducing the receiving cost and facilitating individual receiving. The radial line slot antenna is commonly used in a Ku wave band, has excellent performances of high gain, low section, low side lobe, easy integration and the like, and is widely applied to the occasions such as ship loading, air loading, satellites and the like. However, the relative bandwidth of such an antenna is narrow, and the coupling between the slots affects the design accuracy of the antenna.
Disclosure of Invention
The invention aims to provide a low-coupling broadband radial line slot antenna, and aims to solve the technical problems of narrow bandwidth and large coupling between slots of a radial line slot antenna in the prior art.
In order to achieve the purpose, the low-coupling broadband radial line slot antenna comprises a metal slot array, a dielectric plate, a metal ground and a coaxial connector, wherein the metal slot array, the dielectric plate and the metal ground are sequentially arranged from top to bottom and are all in an equicircular disc shape, and the coaxial connector is arranged at the circle center position of the lower end of the metal ground.
The metal gap array is a metal plate with the upper surface etched with a spiral line gap array, the metal ground is a metal plate with the lower surface removed with a circle with the radius of 2.03mm, and the thicknesses of the metal gap array and the metal ground are both 0.035mm.
The metal slot array is provided with 5 circles of spiral line slots, the spiral line extends outwards from the circle center, the length of the slots in the first 4 circles obeys Chebyshev distribution, and the length of the last circle of slots is determined after impedance matching and directional diagram correction.
By changing the length of the gap in the first 4 circles, the radiation power of each circle obeys Chebyshev distribution, and the side lobe of an antenna directional diagram is favorably reduced.
The center distance between adjacent gaps in the same circle of layer is 0.5 lambdag, so that the gap coupling of the same circle of layer is approximately 0, the number of the arranged gaps is effectively increased, the terminal reflection waves are reduced, and the bandwidth of the antenna is widened.
The dielectric plate is made of an F4BM220 plate, the height is 4mm, the radius is 130mm, the dielectric constant of the dielectric plate is 2.2, and the dielectric loss tangent value is 0.001.
Wherein, the coaxial connector uses an SMA connector, the resistance value is 50 ohm, and the probe length is 3.6mm.
The probe is embedded in the hole, and no metal plate is arranged in the circular range with the radius of 2.03mm around the probe.
The invention provides a low-coupling broadband radial line slot antenna, which adopts a method of corroding and carving a spiral line slot array on an upper layer, arranges the slot lengths in the front four circles according to Chebyshev distribution, corrects a directional diagram by optimizing the slot length of the last circle, thereby obtaining a better low-side lobe pencil-shaped directional diagram, ensures that the coupling between the adjacent slots is lowest and the slot intervals are more dense due to the fact that the interval between the adjacent slot units of the same circle layer is 0.5 lambdag, is beneficial to arranging more slots to increase the radiation effect, finally changes the depth of a coaxial probe inserted into a dielectric plate and the slot length of the last circle to adjust the input echo loss and the broadband resonance point of the antenna, and proves that the S11 at 11GHz-13.7GHz is less than-20 dB through experimental data, the relative bandwidth of the low-coupling broadband radial line slot antenna exceeds 21.8%, and better broadband performance is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a top view of a low-coupling broadband radial line slot antenna provided by the present invention.
Fig. 2 is a schematic structural diagram of a low-coupling broadband radial line slot antenna provided by the invention.
Fig. 3 is a schematic structural diagram of a bottom feed portion of a low-coupling broadband radial slot antenna provided by the invention.
Fig. 4 is a schematic diagram of the reflection coefficient of the antenna according to the embodiment of the present invention.
Fig. 5 is a schematic diagram of antenna axial ratio parameters according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of gain pattern parameters for an embodiment of the present invention.
1-metal gap array, 2-dielectric plate, 3-metal ground, 4-coaxial connector and 5-probe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 3, the present invention provides a low-coupling broadband radial line slot antenna, including a metal slot array 1, a dielectric plate 2, a metal ground 3, and a coaxial connector 4, where the metal slot array 1, the dielectric plate 2, and the metal ground 3 are sequentially arranged from top to bottom and are all arranged in an equal-size circular disk shape, and the coaxial connector 4 is arranged at a circle center position of a lower end of the metal ground 3.
Specifically, the present invention provides a specific embodiment:
the dielectric plate 2 is made of an F4BM220 plate, the height is 4mm, the radius is 130mm, the dielectric constant of the dielectric plate 2 is 2.2, the dielectric loss tangent value is 0.001, the working center frequency is 12GHz, and the corresponding waveguide wavelength is 16.85mm.
The metal gap array 1 is a metal plate with a spiral line gap array etched on the upper surface in a corrosion mode, the metal ground 3 is a metal plate with a radius of 2.03mm removed from the lower surface in a circular mode, and the thickness of the metal gap array 1 and the thickness of the metal ground 3 are both 0.035mm.
As shown in fig. 1, 5 circles of spiral line gaps are arranged on the metal gap array 1, the spiral line extends outwards from the circle center, the circular polarization gap units in the shape of a Chinese character 'ren' are arranged into 5 circles according to the spiral line form, the radial distance between every circle of the circular polarization gap units is 16.86mm (1.0 λ g), the central distance between adjacent gaps on the same circle layer is 8.43mm (0.5 λ g), the first 4 circles of radiation power are distributed according to chebyshev, and the 5 th circle is used for adjusting matching and reducing side lobes.
More specifically, the chebyshev distribution coefficient in this embodiment is 3.1:2.6:1.7:1, calculating to obtain the length of a first circle of gaps to be 8.19mm, the length of a second circle of gaps to be 8.6mm, the length of a third circle of gaps to be 8.53mm, the length of a fourth circle of gaps to be 8.3mm, and finally obtaining the length of the gaps to be 8.3mm through simulation optimization.
The coaxial connector 4 in this embodiment is an SMA connector, and has a resistance value of 50 ohms and a length of the probe 5 of 3.6mm.
A hole with the radius of 0.62mm and the depth of 3.6mm is formed in the center of the dielectric plate 2, the probe 5 is embedded in the hole, no metal plate exists in the circular range with the radius of 2.03mm around the probe 5, and the probe 5 is prevented from being in contact with the metal ground 3 to form grounding.
Furthermore, wave absorbing materials are arranged at the terminal of the low-coupling broadband radial line slot antenna, and the input return loss and the broadband resonance point of the antenna can be adjusted by changing the depth of the probe 5 of the coaxial connector 4 inserted into the dielectric plate 2 and the length of the last circle of slot.
In order to test the performance of the low-coupling broadband radial line slot antenna, the invention carries out corresponding parameter test on the embodiment:
as shown in fig. 4, fig. 4 provides the input return loss of the antenna for this embodiment, and it can be seen from the figure that S of the low-coupling broadband radial line slot antenna 11 The relative bandwidth is more than 21.8 percent and the better broadband characteristic is realized when the frequency is lower than-20 dB at 11GHz-13.7 GHz.
FIG. 5 is an axial ratio of the antenna of this embodiment, and it can be seen from the graph that the axial ratio is lower than 0.5dB from 11GHz to 14GHz, and the antenna has excellent circular polarization performance.
Fig. 6 shows the gain pattern of the antenna of this embodiment, and it is seen from the figure that the gain reaches 25dB, the beam is pencil-shaped and the side lobe is low.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A low-coupling broadband radial line slot antenna is characterized in that,
the metal gap array, the dielectric plate and the metal ground are sequentially arranged from top to bottom and are all in the shape of an equal-size disc, and the coaxial joint is arranged at the position of the circle center of the lower end of the metal ground.
2. The low-coupling broadband radial line slot antenna of claim 1,
the metal gap array is a metal plate with the upper surface etched with a spiral line gap array in a corrosion carving mode, the metal ground is a metal plate with the lower surface removed with a circle with the radius of 2.03mm, and the thicknesses of the metal gap array and the metal ground are both 0.035mm.
3. The low-coupling broadband radial line slot antenna of claim 2,
the metal slot array is provided with 5 circles of spiral line slots, the spiral line extends outwards from the circle center, the length of the slots in the first 4 circles obeys Chebyshev distribution, and the length of the last circle of slots is determined after impedance matching and directional diagram correction.
4. The low-coupling broadband radial line slot antenna of claim 3,
the center-to-center spacing of adjacent slots in the same ring layer is 0.5 lambdag.
5. The low-coupling broadband radial line slot antenna of claim 1,
the dielectric plate is made of F4BM220 plate, the height is 4mm, the radius is 130mm, the dielectric constant of the dielectric plate is 2.2, and the dielectric loss tangent value is 0.001.
6. The low-coupling broadband radial line slot antenna of claim 1,
the coaxial connector uses an SMA connector, the resistance value is 50 ohms, and the length of the probe is 3.6mm.
7. The low-coupling broadband radial line slot antenna of claim 6,
the medium plate is characterized in that a hole with the radius of 0.62mm and the depth of 3.6mm is formed in the center of the medium plate, the probe is embedded in the hole, and no metal plate exists in the circular range with the radius of 2.03mm around the probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210814602.5A CN115207607A (en) | 2022-07-11 | 2022-07-11 | Low-coupling broadband radial line slot antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210814602.5A CN115207607A (en) | 2022-07-11 | 2022-07-11 | Low-coupling broadband radial line slot antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115207607A true CN115207607A (en) | 2022-10-18 |
Family
ID=83580421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210814602.5A Pending CN115207607A (en) | 2022-07-11 | 2022-07-11 | Low-coupling broadband radial line slot antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115207607A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576942A (en) * | 2009-09-04 | 2012-07-11 | 日本电气东芝太空系统株式会社 | Radial line slot array antenna |
| CN203707321U (en) * | 2013-12-24 | 2014-07-09 | 中国电子科技集团公司第三十六研究所 | Low profile ultra wide band orientation plane spiral antenna |
| CN104022360A (en) * | 2014-04-24 | 2014-09-03 | 江苏科技大学 | Planar helical antenna of combined structure |
| CN104733856A (en) * | 2015-03-09 | 2015-06-24 | 华南理工大学 | MIMO antenna decoupled through three gaps |
| CN106450738A (en) * | 2016-11-28 | 2017-02-22 | 电子科技大学 | High-gain dual-circular-polarization flat antenna |
| CN109950685A (en) * | 2019-03-01 | 2019-06-28 | 南京理工大学 | A kind of high-gain circular polarisation radial line slot antenna of beam tilt |
-
2022
- 2022-07-11 CN CN202210814602.5A patent/CN115207607A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576942A (en) * | 2009-09-04 | 2012-07-11 | 日本电气东芝太空系统株式会社 | Radial line slot array antenna |
| CN203707321U (en) * | 2013-12-24 | 2014-07-09 | 中国电子科技集团公司第三十六研究所 | Low profile ultra wide band orientation plane spiral antenna |
| CN104022360A (en) * | 2014-04-24 | 2014-09-03 | 江苏科技大学 | Planar helical antenna of combined structure |
| CN104733856A (en) * | 2015-03-09 | 2015-06-24 | 华南理工大学 | MIMO antenna decoupled through three gaps |
| CN106450738A (en) * | 2016-11-28 | 2017-02-22 | 电子科技大学 | High-gain dual-circular-polarization flat antenna |
| CN109950685A (en) * | 2019-03-01 | 2019-06-28 | 南京理工大学 | A kind of high-gain circular polarisation radial line slot antenna of beam tilt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108511924B (en) | Broadband end-fire antenna array for millimeter wave communication system | |
| CN113506987B (en) | Broadband high-gain circularly polarized filter antenna and wireless communication equipment | |
| CN113922079B (en) | Novel H-plane SIW horn antenna based on super-surface unit | |
| CN113097733A (en) | Hexagonal super-surface broadband high-gain antenna | |
| CN114784492B (en) | Miniaturized SIW high-gain magnetic electric dipole antenna array | |
| CN114883785B (en) | Thin dual-polarization ultra-wide bandwidth angle scanning array antenna | |
| CN110534892B (en) | Miniaturized inboard spiral coupling feed's slot helical antenna | |
| CN112086755A (en) | Horn antenna array element of double circular polarization, wide wave beam and high polarization purity medium | |
| CN114498029A (en) | Broadband waveguide slot array antenna | |
| CN113013628B (en) | Compact high-efficiency reflection-free leaky-wave antenna | |
| CN106816717B (en) | Conical beam circularly polarized antenna | |
| CN216671931U (en) | Novel X-band omnidirectional antenna | |
| CN115207607A (en) | Low-coupling broadband radial line slot antenna | |
| CN115173068B (en) | Broadband circularly polarized substrate integrated waveguide horn antenna array and wireless communication equipment | |
| CN111180877A (en) | Substrate integrated waveguide horn antenna and control method thereof | |
| CN116345164A (en) | Ku frequency band broadband double circularly polarized microstrip antenna | |
| EP1886384B1 (en) | Disk monopole antenna | |
| KR100667159B1 (en) | Circular Polarized Helical Radiating Element and its Array Antenna operating at TX/RX band | |
| CN212783788U (en) | Radiation unit, antenna array and radar applying antenna array | |
| CN114006176A (en) | High-gain 60GHz millimeter wave array antenna | |
| CN109616762B (en) | Ka-band high-gain substrate integrated waveguide corrugated antenna and system | |
| CN116031626B (en) | High-gain millimeter wave antenna | |
| CN114284739B (en) | Leaky-wave antenna with sum and difference beam scanning function and of Ku wave band | |
| CN111193103A (en) | Radiation unit, antenna array and radar applying antenna array | |
| CN219643114U (en) | Monopole decoupling ternary antenna array based on parasitic element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |