CN107785654B - Miniaturized strong coupling antenna - Google Patents
Miniaturized strong coupling antenna Download PDFInfo
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- CN107785654B CN107785654B CN201710651100.4A CN201710651100A CN107785654B CN 107785654 B CN107785654 B CN 107785654B CN 201710651100 A CN201710651100 A CN 201710651100A CN 107785654 B CN107785654 B CN 107785654B
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- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- 230000008878 coupling Effects 0.000 title claims description 11
- 230000009977 dual effect Effects 0.000 claims abstract description 13
- 230000005855 radiation Effects 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
-
- 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
- H01Q15/24—Polarising devices; Polarisation filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Abstract
The invention discloses a miniaturized strong-coupling antenna, which comprises dual-polarized antenna units, wherein the dual-polarized antenna units are arranged side by side at equal intervals to form a feed array, and the centers of the dual-polarized antenna units are on the same straight line; the array dielectric plates are correspondingly arranged at the upper end of one dual-polarized antenna unit, and adjacent array dielectric plates are connected with each other; the array reflecting plate is arranged at the lower end of the feed array; wherein, the adjacent dual polarized antenna units are provided with a spacing (S), and the range of the spacing (S) is as follows: 300mm-360mm.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a miniaturized strong coupling antenna which can be used for a satellite-borne antenna.
Background
With the development of communication technology, antennas are a vital part of wireless communication devices, and the quality of the antenna performance directly affects the communication quality of the entire communication system. Due to the special advantages of the dual-polarized antenna, the dual-polarized antenna can be used as a base station antenna, and a circularly polarized antenna can be obtained by a method of loading a branch coupler or a directional coupler. The antenna has the characteristics of wide frequency band, simple structure, easy processing and the like, and has the advantages of low profile, miniaturization, light weight and the like obtained by adopting a strong coupling technology, so that the antenna becomes a preferable antenna in the design of the satellite-borne antenna. The array element spacing of the traditional antenna array needs to meet lambda 0 /2<S<λ 0 The conventional antenna array has high section and large volume, and certain difficulty in designing and installing the satellite-borne antenna.
Disclosure of Invention
The purpose of the invention is that: the invention provides a miniaturized strong-coupling antenna, which is different from the traditional antenna array in reducing mutual coupling among array elements as much as possible.
The technical scheme for achieving the purpose is as follows: the miniature strong coupling antenna comprises dual-polarized antenna units which are arranged side by side at equal intervals to form a feed array, wherein the centers of the dual-polarized antenna units are on the same straight line; the array dielectric plates are correspondingly arranged at the upper end of one dual-polarized antenna unit, and adjacent array dielectric plates are connected with each other; the array reflecting plate is arranged at the lower end of the feed array; wherein, the adjacent dual polarized antenna units are provided with a spacing (S), and the range of the spacing (S) is as follows: 300mm-360mm.
The dual-polarized antenna unit comprises a radiation patch which is attached to the lower surface of the array dielectric plate; the two power feeding units are arranged on the lower surface of the radiation patch in a crisscross mode.
The feed unit comprises a resonant feed loop dielectric layer provided with a resonant feed gap; the S-shaped feed structure is assembled in the resonant feed ring dielectric layer; the inner core of the coaxial cable is connected with the S-shaped feed structure, and the metal shielding layer of the coaxial cable is fixed on the resonant feed ring dielectric layer; the dielectric layer of the resonant feed ring is assembled on the dielectric ring bracket; the junction of the resonant feed loop dielectric layer and the electric loop bracket is a supporting point; the electric ring support is of a concave structure, the middle of the electric ring support is provided with a concave connecting groove, and the two dual-polarized antenna units are in cross connection through the connecting groove; the S-shaped feed structure is used for coupling and feeding the resonant feed ring dielectric layer through the resonant feed gap, and the resonant feed ring dielectric layer feeds the radiation patch through the supporting point, so that radiation is generated.
The S-shaped feed structure comprises an S-shaped feed circuit, one end of the S-shaped feed circuit is assembled on one side edge of the resonant feed ring dielectric layer through a tail end branch joint, and the other end of the S-shaped feed circuit is assembled on the other side edge of the resonant feed ring dielectric layer through a tail end branch joint; wherein the tail end branch is positioned on the upper side or the lower side of the resonance feed gap; the body of the S-shaped feed circuit is arranged along the layer surface of the resonant feed ring dielectric layer; and the body of the S-shaped feed circuit is fixed on the resonant feed ring dielectric layer through the bonding pad.
And the tail end branch joint is assembled on the resonant feed loop dielectric layer in an adjusting mode.
The resonant feed loop dielectric layer is a polytetrafluoroethylene layer.
The radiating patch has a width (Wa) in the range of 0.24λ L ～0.28λ L ，λ L Is the lowest operating frequency of the operating frequency band.
A space (H) is reserved between the array dielectric plate and the array reflecting plate; the distance (H) is in the range of 0.11λ L ～0.15λ L ，λ L Is the lowest operating frequency of the operating frequency band.
The array medium plate is a polytetrafluoroethylene plate.
The array reflecting plate is a metal plate.
The invention has the advantages that: the miniaturized strong-coupling antenna utilizes the S-shaped microstrip feeder line to couple and feed, and can obtain better matching characteristics by adjusting each tail end branch of the S-shaped feed structure. The resonant feed loop technology is introduced, and the resonant feed loop dielectric layer can be used as a bottom plate of an S-shaped microstrip feed line and a feed structure of a radiation patch, so that the matching characteristic in the working frequency band of the antenna is improved, and a wider working bandwidth is obtained. The application of the technology effectively improves the impedance matching of the antenna and reduces the size of the antenna, thereby obtaining a miniaturized antenna array. Has the characteristics of small volume, simple structure, easy processing, low cost and the like.
Drawings
The invention is further explained below with reference to the drawings and examples.
Fig. 1 is a schematic diagram of the front structure of a feed array of an area array of the present invention.
Fig. 2 is a schematic top structure of a feed array of an area array of the present invention.
Fig. 3 is a schematic diagram of the bottom structure of the feed array of the area array of the present invention.
Fig. 4 is an overall structure diagram of the dual polarized antenna element of the present invention.
Fig. 5 is a schematic structural view of the power feeding unit of the present invention.
Fig. 6 is a port return loss of an antenna element of the present invention.
Fig. 7 is a diagram of the port isolation of an antenna element of the present invention.
Fig. 8 is a horizontal plane pattern of the antenna element of the present invention at 430 MHz.
Fig. 9 is a vertical plane pattern of the antenna element of the present invention at 430 MHz.
Fig. 10 and 12 show active standing waves of the ports of the linear array +45° polarized antenna array according to the present invention.
Fig. 11 and 13 are diagrams of the +45° polarized antenna of the linear array of the present invention at 430MHz for each column of elements.
Wherein,
1 a dual polarized antenna unit; 2 array dielectric plates;
3 array reflecting plates; 11 radiating patches;
a 12 feed unit; 121 resonant feed ring dielectric layer;
a 122S-type feed structure; 123 electric ring support;
1211 a resonant feed slot; 1221S-type feed circuit;
1222 bonding pads; 1223 end branches.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. The directional terms referred to in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the invention and is not limiting of the invention.
An embodiment, as shown in fig. 1 to 3, is a miniaturized strong-coupling antenna, including a dual polarized antenna unit 1, an array dielectric plate 2, and an array reflection plate 3.
In this embodiment, the dual polarized antenna units 1 are arranged side by side at equal intervals to form a feed array, and the centers of the dual polarized antenna units 1 are on the same straight line. Wherein, the adjacent dual polarized antenna units 1 have a spacing (S) between them, and the spacing (S) ranges from: 300mm-360mm. Preferably 330mm.
In this embodiment, the number of dual polarized antenna elements 1 is 8, and they are arranged side by side to form a linear array of 1*8. The mutual coupling strength between the dual-polarized antenna units 1 is controlled through the space (S), the capacitive reactance formed by mutual coupling response between the dual-polarized antenna units 1 is utilized to counteract the inductive reactance between the dual-polarized antenna units 1 and the array reflecting plate 3, so that the impedance matching performance of an antenna port is improved, the antenna bandwidth is widened, and the miniaturization of the base station antenna array is realized by reducing the height of an antenna section and the space between array elements.
As shown in fig. 4, in the present embodiment, the dual polarized antenna unit 1 includes a radiation patch 11 and two feeding units 12. The radiation patch 11 is attached to the lower surface of the array dielectric plate 2; the two power feeding units 12 are disposed on the lower surface of the radiation patch 11 in a crisscross manner. The specific design is as follows: after the two power supply units 12 are arranged in a crisscross manner, the two power supply units are rotated by 45 degrees relative to the horizontal and longitudinal directions, and a dual polarization power supply structure with the angle of + -45 degrees is formed. The feeding unit 12 is connected to the radiating patch 11.
In this embodiment, the radiation patch 11 has a width (Wa) in the range of 0.24λ L ～0.28λ L ，λ L Is the lowest operating frequency of the operating frequency band.
As shown in fig. 5, in this embodiment, the feeding unit 12 includes a resonant feeding ring dielectric layer 121, an S-type feeding structure 122, an electrical ring support 123, and a coaxial cable.
Specifically, the electric ring support 123 has a concave structure, the middle part of the electric ring support is a concave connecting groove, and the two dual-polarized antenna units 1 are in crisscross connection through the connecting groove; the resonant feed ring dielectric layer 121 is distributed in a concave structure, and the connection part of the resonant feed ring dielectric layer and the electric ring support 123 is a supporting point. The resonant feed loop dielectric layer 121 is connected to the radiating patch 11 by an electrical loop bracket 123.
The resonant feed ring dielectric layer 121 is provided with a resonant feed slot 1211, and the resonant feed slot 1211 is arranged on two sides of the left-right symmetry of the concave structure. The dielectric layer 121 of the resonant feed ring is a polytetrafluoroethylene layer, the thickness of which is 1.2mm, and the dielectric constant of which is 2.2. The resonant feed loop dielectric layer 121 can either widen the bandwidth through the coupling feed of the resonant feed slot 1211 or reduce the antenna profile through the short circuit connection of the electrical loop bracket 123.
The S-shaped feed structure 122 is assembled in the resonant feed ring dielectric layer 121. Specifically, the S-shaped feeding structure 122 includes an S-shaped feeding circuit 1221 and a pad 1222. Wherein, one end of the S-shaped feeding circuit 1221 is assembled to one side of the resonant feeding ring dielectric layer 121 through a terminal branch 1223, and the other end is assembled to the other side of the resonant feeding ring dielectric layer 121 through a terminal branch 1223; wherein the end branch 1223 is located on the upper side or the lower side of the resonant feed slot 1211; wherein the body of the S-shaped feed circuit 1221 is arranged along the level of the resonant feed ring dielectric layer 121; the body of the S-shaped feed circuit 1221 is secured to the resonant feed ring dielectric layer 121 by a pad 1222.
In this embodiment, the end branch 1223 is adjustably assembled to the resonant feed ring dielectric layer 121. Better matching characteristics are achieved by adjusting the end branch 1223.
In this embodiment, the inner core of the coaxial cable is connected to the S-shaped feeding structure 122, and the metal shielding layer of the coaxial cable is fixed to the dielectric layer 121 of the resonant feeding ring.
The S-shaped feed structure 122 couples and feeds the resonant feed ring dielectric layer 121 through a resonant feed slot 1211, and the resonant feed ring dielectric layer 121 feeds the radiation patch 11 through a supporting point, thereby generating radiation.
In this embodiment, the array dielectric plates 2 are correspondingly disposed at the upper end of one dual-polarized antenna unit 1, and adjacent array dielectric plates 2 are connected with each other; the array dielectric plate 2 is a square polytetrafluoroethylene plate, the thickness of the array dielectric plate is 1.2mm, and the dielectric constant of the array dielectric plate is 2.2.
In this embodiment, the array reflecting plate 3 is disposed at the lower end of the feeding array; a space (H) is reserved between the array dielectric plate 2 and the array reflecting plate 3; the distance (H) is in the range of 0.11λ L ～0.15λ L ，λ L Is the lowest operating frequency of the operating frequency band. Typically, the pitch (H) is 110mm. The array reflecting plate 3 is a metal plate, and the thickness of the metal plate is 2mm.
Referring to fig. 6, at less than |s 11 The standard is-10 dB, the working frequency band of the dual-polarized antenna unit 1 selected in the implementation mode is 320 MHz-580 MHz, and the relative bandwidth is 57.8%.
Referring to fig. 7, in the embodiment, the dual-port isolation of the selected antenna unit is higher than 55dB in the whole working frequency band (320 MHz-580 MHz), which indicates that there is a higher isolation between the two ports, and ensures that the two ports do not interfere with each other when working.
Referring to fig. 8 and 9, for the far field radiation pattern of the selected antenna element in the embodiment at 430MHz horizontal plane, the maximum radiation direction seen from the figure is in the perpendicular direction to the reflector plate, and the cross polarization is at least 38dB lower than the main polarization, indicating that the antenna polarization element has a lower cross polarization.
Referring to fig. 10 and 12, in the active return loss curves of the ports of the antenna array in the embodiment, it can be seen that the active return loss of each column of ports is basically less than-10 dB in the frequency range of 320MHz to 580MHz ghz, and part of ports are slightly higher than-10 dB at high frequency, but the electrical performance of the antenna array is not affected.
Referring to fig. 11 and 13, in an embodiment, the antenna array is shown to have a maximum gain of greater than 15.7dBi, a horizontal 3dB lobe width of 68.5 degrees, and a vertical 3dB lobe width of 12.8 degrees, for a pattern at 430MHz of the antenna array. And the maximum radiation direction starts from the direction perpendicular to the reflecting plate without any deviation, and the front-to-back ratio is about 16dB.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A miniaturized strongly coupled antenna comprising:
the dual-polarized antenna units are arranged side by side at equal intervals to form a feed array, and the centers of the dual-polarized antenna units are on the same straight line;
the array dielectric plates are correspondingly arranged at the upper end of one dual-polarized antenna unit, are arranged side by side, and are connected with each other between adjacent corners of the array dielectric plates;
the array reflecting plate is arranged at the lower end of the feed array;
wherein, the adjacent dual polarized antenna units are provided with a spacing (S), and the range of the spacing (S) is as follows: 300mm-360mm;
the dual polarized antenna unit includes:
a radiation patch attached to the lower surface of the array dielectric plate;
the two power supply units are arranged on the lower surface of the radiation patch in a crisscross manner;
the power feeding unit includes:
the resonant feed loop dielectric layer is provided with a resonant feed gap;
the S-shaped feed structure is assembled in the resonant feed ring dielectric layer;
the inner core of the coaxial cable is connected with the S-shaped feed structure, and the metal shielding layer of the coaxial cable is fixed on the resonant feed ring dielectric layer;
the dielectric layer of the resonant feed ring is assembled on the dielectric ring bracket; the junction of the resonant feed loop dielectric layer and the electric loop bracket is a supporting point;
the electric ring support is of a concave structure, the middle of the electric ring support is provided with a concave connecting groove, and the two dual-polarized antenna units are in cross connection through the connecting groove;
the S-shaped feed structure is used for coupling and feeding the resonant feed ring dielectric layer through the resonant feed gap, and the resonant feed ring dielectric layer feeds the radiation patch through the supporting point, so that radiation is generated.
2. The miniaturized strongly coupled antenna of claim 1, wherein the S-shaped feed structure includes:
the S-shaped feed circuit is assembled on one side of the resonant feed ring dielectric layer through a tail end branch joint, and the other end of the S-shaped feed circuit is assembled on the other side of the resonant feed ring dielectric layer through a tail end branch joint;
wherein the tail end branch is positioned on the upper side or the lower side of the resonance feed gap;
the body of the S-shaped feed circuit is arranged along the layer surface of the resonant feed ring dielectric layer;
and the body of the S-shaped feed circuit is fixed on the resonant feed ring dielectric layer through the bonding pad.
3. The miniaturized strongly coupled antenna of claim 2, wherein the end stub is adjustably assembled to the resonating feed ring dielectric layer.
4. The miniaturized strongly coupled antenna of claim 1, wherein the resonating feed ring dielectric layer is a polytetrafluoroethylene layer.
5. The miniaturized strongly coupled antenna of claim 1, wherein the radiating patch has a width (Wa) in the range of 0.24 λ L ～0.28λ L ，λ L Is the lowest operating frequency of the operating frequency band.
6. The miniaturized strongly coupled antenna of claim 1, wherein a spacing (H) is provided between the array dielectric plate and the array reflector plate; the distance (H) is in the range of 0.11λ L ～0.15λ L ，λ L Is the lowest operating frequency of the operating frequency band.
7. The miniaturized strongly coupled antenna of claim 1, wherein the array dielectric plate is a polytetrafluoroethylene plate.
8. The miniaturized strongly coupled antenna of claim 1, wherein the array reflector is a metal plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651100.4A CN107785654B (en) | 2017-08-02 | 2017-08-02 | Miniaturized strong coupling antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710651100.4A CN107785654B (en) | 2017-08-02 | 2017-08-02 | Miniaturized strong coupling antenna |
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| Publication Number | Publication Date |
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| CN107785654A CN107785654A (en) | 2018-03-09 |
| CN107785654B true CN107785654B (en) | 2024-03-22 |
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| CN112864617B (en) * | 2021-01-12 | 2022-04-08 | 西安电子科技大学 | 5G millimeter wave dual-polarized broadband wide-angle tightly-coupled array antenna |
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|---|---|---|---|---|
| CN101814658A (en) * | 2009-11-03 | 2010-08-25 | 上海大学 | S/X dual-band dual-polarized shared-aperture micro-strip oscillator and dielectric resonator array antenna |
| CN105846081A (en) * | 2016-04-13 | 2016-08-10 | 电子科技大学 | Dual polarized one-dimensional tightly coupled ultra wide band and wide angle sweep phased array antenna |
| CN106684574A (en) * | 2016-12-19 | 2017-05-17 | 中国电子科技集团公司第二十研究所 | 6-18GHz (gigahertz) ultra-wideband array antenna |
| CN106848554A (en) * | 2017-01-13 | 2017-06-13 | 南京航空航天大学 | A kind of ultra wide bandwidth angle antenna array based on interdigitated coupled dipole unit |
| CN206313126U (en) * | 2016-12-09 | 2017-07-07 | 桂林电子科技大学 | A kind of ultra-compact Section of Microstrip Antenna Array |
| CN206992301U (en) * | 2017-08-02 | 2018-02-09 | 苏州工业园区艺达精密机械有限公司 | One kind miniaturization close coupling antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8633856B2 (en) * | 2009-07-02 | 2014-01-21 | Blackberry Limited | Compact single feed dual-polarized dual-frequency band microstrip antenna array |
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2017
- 2017-08-02 CN CN201710651100.4A patent/CN107785654B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814658A (en) * | 2009-11-03 | 2010-08-25 | 上海大学 | S/X dual-band dual-polarized shared-aperture micro-strip oscillator and dielectric resonator array antenna |
| CN105846081A (en) * | 2016-04-13 | 2016-08-10 | 电子科技大学 | Dual polarized one-dimensional tightly coupled ultra wide band and wide angle sweep phased array antenna |
| CN206313126U (en) * | 2016-12-09 | 2017-07-07 | 桂林电子科技大学 | A kind of ultra-compact Section of Microstrip Antenna Array |
| CN106684574A (en) * | 2016-12-19 | 2017-05-17 | 中国电子科技集团公司第二十研究所 | 6-18GHz (gigahertz) ultra-wideband array antenna |
| CN106848554A (en) * | 2017-01-13 | 2017-06-13 | 南京航空航天大学 | A kind of ultra wide bandwidth angle antenna array based on interdigitated coupled dipole unit |
| CN206992301U (en) * | 2017-08-02 | 2018-02-09 | 苏州工业园区艺达精密机械有限公司 | One kind miniaturization close coupling antenna |
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