CN116799498A - Butterfly balun feed dual-polarized cross dipole antenna - Google Patents
Butterfly balun feed dual-polarized cross dipole antenna Download PDFInfo
- Publication number
- CN116799498A CN116799498A CN202310819275.7A CN202310819275A CN116799498A CN 116799498 A CN116799498 A CN 116799498A CN 202310819275 A CN202310819275 A CN 202310819275A CN 116799498 A CN116799498 A CN 116799498A
- Authority
- CN
- China
- Prior art keywords
- metal
- butterfly
- balun
- oscillator
- isosceles trapezoid
- 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
- 239000002184 metal Substances 0.000 claims abstract description 355
- 229910052751 metal Inorganic materials 0.000 claims abstract description 355
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 230000005855 radiation Effects 0.000 claims abstract description 21
- 238000005388 cross polarization Methods 0.000 claims abstract description 16
- 239000000523 sample Substances 0.000 claims description 72
- 239000004020 conductor Substances 0.000 claims description 56
- 230000009977 dual effect Effects 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 14
- 238000004891 communication Methods 0.000 abstract description 10
- 238000004088 simulation Methods 0.000 description 13
- 238000005259 measurement Methods 0.000 description 8
- 230000005684 electric field Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation 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
- H01Q1/50—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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- 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
-
- 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
- H01Q1/52—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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
Landscapes
- Details Of Aerials (AREA)
Abstract
The application discloses a butterfly balun feed dual-polarized cross dipole antenna, which comprises: the dual-polarization dipole antenna comprises a dielectric substrate, a cross-polarization dipole vibrator, a feed structure and a metal fence, wherein a first gap which penetrates through the metal radiating vibrator vertically is formed in the metal radiating vibrator so as to increase the capacitance of an equivalent circuit of the butterfly balun feed dual-polarization cross dipole antenna; the antenna has the advantages that the performance of the antenna is greatly improved by improving the feed structure and the metal radiating oscillator, the structure is compact, the wide impedance bandwidth from 2.3GHz to 6GHz is provided, and the isolation degree is more than 15dB; in addition, in the whole frequency band, the E plane and H plane radiation patterns are stable, the isolation between the co-polarization and the cross polarization is more than 15dB, the high gain of the low frequency band of 6dBi and the high frequency band of 7dBi can be realized, and the application prospect is quite wide in the radio communication systems such as radar, communication, telemetry and remote sensing with limited platform space, in particular to the Sub-6GHz5G application field.
Description
Technical Field
The application relates to the technical field of wireless communication, in particular to a butterfly balun feed dual-polarized cross dipole antenna.
Background
Currently, 5G technology is mainly studied in two frequency bands, sub-6GHz and millimeter wave (mmWave), respectively. Wherein Sub-6GHz is the development of 5G using bandwidth resources below 6 GHz. For the 5G technology, the core difficulty is that the coverage difficulty of the base station is large, the inter-frequency cooperation of the large and small base stations is involved, and network mixing at the early stage of 5G and synchronous construction of different frequency bands are considered. Antennas are an integral key component of the radio frequency front end of these communication systems. If the antenna with wider working frequency band and multi-polarization working mode can be adopted, multiple antennas can be fused into a single antenna, so that the manufacturing cost is saved, the antenna volume is reduced, and more importantly, the problems of electromagnetic compatibility and electromagnetic interference among multiple antennas are fundamentally solved.
The part of the existing document-available dual-polarized cross dipole antenna is mainly fed through a coaxial line, and the mode is difficult to meet the requirements of high performance and miniaturization in a wider frequency band, so that a compact structure is difficult to realize; other antennas are fed with microstrip balun, which limits the operating band of the antenna and results in poor isolation of the two ports.
Disclosure of Invention
The application provides a butterfly balun feed dual-polarized cross dipole antenna, which aims to solve the technical problems of single feed balun structure, compact structure, poor impedance transformation and insufficient working frequency band of the existing dual-polarized cross dipole antenna.
According to one aspect of the present application, there is provided a butterfly balun-fed dual-polarized cross dipole antenna comprising:
a dielectric substrate having a dielectric layer formed thereon,
the cross polarization dipole vibrators are arranged on the upper surface of the dielectric substrate and comprise two dipole vibrators, each dipole vibrator comprises two metal radiation vibrators which are arranged in a collinear way, gaps between two adjacent metal radiation vibrators are equal,
the feed structure is arranged below the dielectric substrate and comprises a metal butterfly balun and a coaxial line, the axis of the coaxial line is perpendicular to the dielectric substrate, the coaxial line comprises a metal conductor inner core and a metal outer conductor which are coaxially arranged, the metal conductor inner core penetrates through the metal butterfly balun and is connected with one metal radiating oscillator of the dipole vibrator, the metal outer conductor is connected with the other metal radiating oscillator of the dipole vibrator through the metal butterfly balun, medium filling is arranged between the metal conductor inner core and the metal outer conductor and/or between the metal conductor inner core and the metal butterfly balun,
a metal grounding plate which is arranged in parallel with the dielectric substrate,
the metal base is arranged on the metal grounding plate and is positioned right below the metal butterfly balun, a gap is reserved between the upper surface of the metal base and the bottom surface of the metal butterfly balun,
the metal fences are vertically arranged on the metal grounding plate and are arranged around the cross polarization dipole vibrators in a central symmetry manner, the orthogonal centers of the cross polarization dipole vibrators are positioned on the central symmetry axes of the metal fences,
and a first gap which penetrates through the metal radiating oscillator from top to bottom is formed in the metal radiating oscillator so as to increase the capacitance of an equivalent circuit of the butterfly balun feed dual-polarized cross dipole antenna.
Further, the metal radiating oscillator comprises a first metal radiating oscillator, a second metal radiating oscillator, a third metal radiating oscillator and a fourth metal radiating oscillator, wherein the first metal radiating oscillator and the third metal radiating oscillator form a first dipole oscillator which is arranged in a collinear way along a first direction, the second metal radiating oscillator and the fourth metal radiating oscillator form a second dipole oscillator which is arranged in a collinear way along a second direction, the first direction is perpendicular to the second direction,
the first slit is a rectangular slit,
the long edges of the rectangular gaps on the first metal radiating oscillator and the third metal radiating oscillator are distributed along the second direction,
and the long edges of the rectangular gaps on the second metal radiating oscillator and the fourth metal radiating oscillator are distributed in a second direction.
Further, second gaps which vertically penetrate through the metal radiating vibrators are symmetrically arranged at two ends of the rectangular gaps, the second gaps are communicated with short sides of the rectangular gaps, and sides, communicated with the rectangular gaps, of the second gaps are perpendicular to long sides of the rectangular gaps.
Further, the second slit is a sector or a polygon.
Further, a metal feed probe is arranged on the metal radiation oscillator, a through hole for passing through the metal feed probe is arranged on the dielectric substrate,
the metal feed probes comprise a first metal feed probe, a second metal feed probe, a third metal feed probe and a fourth metal feed probe, wherein the connecting line of the central point of the first metal feed probe and the central point of the third metal feed probe is arranged along a first direction, and the connecting line of the central point of the second metal feed probe and the central point of the fourth metal feed probe is arranged along a second direction.
Further, the metal butterfly balun comprises a first metal butterfly balun and a second metal butterfly balun, the first metal butterfly balun comprises a first isosceles trapezoid wing piece, a second isosceles trapezoid wing piece and a first connecting bridge, the axial lead of the first connecting bridge is distributed along a first direction, two ends of the first connecting bridge are respectively connected with the short side of the first isosceles trapezoid wing piece and the short side of the second isosceles trapezoid wing piece,
the second metal butterfly balun has the same structure as the first metal butterfly balun, a second connecting bridge of the second metal butterfly balun is arranged along a second direction, and the second connecting bridge is perpendicular to the different surface of the first connecting bridge.
Further, the coaxial line comprises a first coaxial line and a second coaxial line which are identical in structure,
the first coaxial first metal conductor inner core penetrates through the first isosceles trapezoid wing piece and is connected with a first metal feeding probe, the first coaxial first metal outer conductor is connected with the third metal feeding probe through the second isosceles trapezoid wing piece,
the second metal conductor inner core of the second coaxial line penetrates through the third isosceles trapezoid wing piece of the second metal butterfly balun and is connected with the second metal feed probe, and the second metal outer conductor of the second coaxial line is connected with the fourth metal feed probe through the fourth isosceles trapezoid wing piece of the second metal butterfly balun.
Further, a first dielectric column is arranged between the first metal feed probe and the first isosceles trapezoid wing, the first dielectric column is sleeved on the first metal conductor inner core,
a second dielectric column is arranged between the second metal feed probe and the third isosceles trapezoid wing, and the second dielectric column is sleeved on the second metal conductor inner core.
Further, a third medium column used for abutting the second isosceles trapezoid wing piece and a fourth medium column used for abutting the fourth isosceles trapezoid wing piece are arranged on the metal base.
Further, the metal fence is arranged in two rows.
The application has the following beneficial effects:
according to the butterfly balun feed dual-polarized cross dipole antenna, four metal radiating oscillators are used for polarization, a first gap is formed in each metal radiating oscillator, so that the capacity of an equivalent circuit of the whole antenna is increased, the radiation performance of the antenna can be greatly improved near a high frequency band in an operating frequency band, an inner conductor of a coaxial line directly passes through two metal butterfly baluns, medium filling can protect the inner conductor of the coaxial line from being shortened and short circuits can be avoided, outer conductors of the two coaxial lines are converted into two balance-unbalance converters, the two balance-unbalance converters are positioned in orthogonal positions, a metal base is used for increasing the distance between a plane of each metal radiating oscillator and a metal grounding plate, higher radiation gain is achieved in a lower operating frequency band, and a gap between the balance-unbalance converters and the metal base can effectively choke current on the outer conductor of the coaxial cable, and the metal fence and the metal grounding plate work together to reflect backward electromagnetic wave signals; the antenna greatly improves the performance of the antenna by improving the feed structure and the metal radiating oscillator, and the butterfly balun feed dual-polarized cross dipole antenna has the size of 65 multiplied by 18.5mm 3 The structure is compact, the wide impedance bandwidth from 2.3GHz to 6GHz is provided, and the isolation degree reaches more than 15dB; in addition, in the whole frequency band, the E plane and H plane radiation patterns are stable, the isolation between the co-polarization and the cross polarization is larger than 15dB, the high gain of the low frequency band of 6dBi and the high frequency band of 7dBi can be realized, and the application prospect is quite wide in the radio communication systems such as radar, communication, telemetry remote sensing and the like with limited platform space, particularly in the Sub-6GHz5G application field.
In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 is a schematic structural view of a butterfly balun-fed dual-polarized cross dipole antenna according to a preferred embodiment of the present application;
fig. 2 is a side view of a butterfly balun-fed dual-polarized cross dipole antenna of a preferred embodiment of the present application;
fig. 3 is a schematic structural view of a metal radiating element according to a preferred embodiment of the present application;
fig. 4 is a schematic structural view of a metallic butterfly balun according to a preferred embodiment of the present application;
fig. 5 is a schematic structural view of a first metal butterfly balun according to a preferred embodiment of the present application;
FIG. 6 is a schematic view of a first coaxial structure of a preferred embodiment of the present application;
fig. 7 is a schematic structural view of a second metal butterfly balun according to a preferred embodiment of the present application;
fig. 8 is a schematic structural view of a second coaxial line of the preferred embodiment of the present application;
fig. 9 is a schematic structural view of a first metal butterfly balun according to a preferred embodiment of the present application;
FIG. 10 is a cross-sectional view taken along A-A in FIG. 9;
FIG. 11 is a B-B cross-sectional view of FIG. 9;
FIG. 12 is a C-C cross-sectional view of FIG. 9;
FIG. 13 is a D-D sectional view of FIG. 9;
FIG. 14 is a graph showing the simulation result of the absolute value of the electric field of the patch antenna when there is no gap on the metal radiating element;
fig. 15 is a diagram of the simulation result of the pattern of the patch antenna when there is no slot on the metal radiating element;
FIG. 16 is a graph showing the simulation result of the absolute value of the electric field of the patch antenna when H slot loading is provided on the metal radiating element;
fig. 17 is a diagram of the simulation result of the directivity pattern of the patch antenna when the H slot loading is provided on the metal radiating element;
FIG. 18 is a schematic dimensional view of a metal feed probe;
FIG. 19 is a schematic size view of a metal radiating element;
FIG. 20 is a schematic dimensional view of a metallic butterfly balun;
FIG. 21 is a schematic view of the dimensions of a metal grounding plate;
FIG. 22 is a simulation and actual measurement of the antenna port reflection coefficient and isolation coefficient;
fig. 23 is a simulation and actual measurement result of the antenna gain;
fig. 24 is an E-plane actual measurement pattern of the antenna, fig. 24 (a) is a 3GHz result, fig. 24 (b) is a 4GHz result, fig. 24 (c) is a 5GHz result, and fig. 24 (d) is a 6GHz result;
fig. 25 shows an H-plane actual measurement pattern of an antenna, fig. 25 (a) shows a 3GHz result, fig. 25 (b) shows a 4GHz result, fig. 25 (c) shows a 5GHz result, and fig. 25 (d) shows a 6GHz result.
Legend description:
1. a dielectric substrate; 11. a through hole; 2. a metal radiating oscillator; 201. a first slit; 202. a second slit; 21. a first metal radiating element; 22. a second metal radiating element; 23. a third metal radiating element; 24. a fourth metal radiating element; 3. a metal feed probe; 31. a first metal feed probe; 32. a second metal feed probe; 33. a third metal feed probe; fourth gold 34, a feed probe; 4. a metallic butterfly balun; 41. a first metal butterfly balun; 411. a first isosceles trapezoid tab; 412. a second waist trapezoid wing panel; 413. a first connection bridge; 42. a second metal butterfly balun; 421. a third isosceles trapezoid wing panel; 422. a fourth isosceles trapezoid tab; 423. a second connecting bridge; 5. a metal base; 6. a metal grounding plate; 7. a coaxial line; 71. a first coaxial line; 711. a first metal conductor core; 712. a second medium filling; 713. a first metal outer conductor; 72. a second coaxial line; 721. a second metal conductor core; 722. a second medium filling; 723. a second metal outer conductor; 8. a metal fence; 91. a first dielectric pillar; 92. a second dielectric pillar; 93. a third dielectric column; 94. and a fourth dielectric pillar.
Detailed Description
Embodiments of the application are described in detail below with reference to the attached drawing figures, but the application can be practiced in a number of different ways, as defined and covered below.
Referring to fig. 1 to 13 together, the butterfly balun-fed dual-polarized cross dipole antenna of the present embodiment includes:
the dielectric substrate 1 is made of a non-conductive material, the thickness of the dielectric substrate 1 is 0.2-1 mm, the relative dielectric constant is 2-3, and the dielectric loss angle is 0.0004-0.001;
the cross polarization dipole vibrators are arranged on the upper surface of the dielectric substrate 1 and comprise two dipole vibrators, each dipole vibrator comprises two metal radiation vibrators 2 which are arranged in a collinear manner, gaps between two adjacent metal radiation vibrators 2 are equal, and the thickness of each metal radiation vibrator 21-24 on the upper surface of the dielectric substrate 1 is 0.017-0.035 mm thick gold foil, silver foil or copper foil; the metal radiation vibrators 21-24 are approximately quadrilateral, and the length is 30-40 mm;
the feed structure is arranged below the medium substrate 1 and comprises a metal butterfly balun 4 and a coaxial line 7, the axis of the coaxial line 7 is arranged perpendicular to the medium substrate 1, the coaxial line 7 comprises a metal conductor inner core and a metal outer conductor which are coaxially arranged, the metal conductor inner core penetrates through the metal butterfly balun 4 and is connected with one metal radiating oscillator 2 of the dipole oscillator, the metal outer conductor is connected with the other metal radiating oscillator 2 of the dipole oscillator through the metal butterfly balun 4, and medium filling is arranged between the metal conductor inner core and the metal outer conductor and between the metal conductor inner core and the metal butterfly balun 4 so as to avoid short circuits;
the metal grounding plate 6 is arranged in parallel with the dielectric substrate 1, the projection of the metal grounding plate 6 on the plane of the dielectric substrate 1 is square, the width of the metal grounding plate is 50-70 mm, and the thickness of the metal grounding plate is 1-2 mm;
the metal base 5 is arranged on the metal grounding plate 6 and is positioned right below the metal butterfly balun 4, a gap is reserved between the upper surface of the metal base 5 and the bottom surface of the metal butterfly balun 4, the projection of the metal base 5 on the plane of the dielectric substrate 1 is square, the width of the metal base is 18-25 mm, and the height of the metal base 5 is 3-8 mm; to increase the distance between the driven metal radiating element 2 plane and the metal ground plate 6, achieving a higher radiation gain in the lower operating band;
the metal fences 8 are vertically arranged on the metal grounding plate 6 and are arranged around the cross polarization dipole vibrators in a central symmetry manner, the orthogonal centers of the cross polarization dipole vibrators are positioned on the central symmetry axes of the metal fences 8,
the metal radiating oscillator 2 is provided with a first gap 201 which penetrates through the metal radiating oscillator 2 up and down so as to increase the capacitance of an equivalent circuit of the butterfly balun feed dual-polarized cross dipole antenna.
In the antenna of this embodiment, four metal radiating elements 2 are used as polarization, and a first gap 201 is formed on the metal radiating element 2, so that the capacity of the equivalent circuit of the whole antenna is increased, the radiation performance of the antenna can be greatly improved near a high frequency band in an operating frequency band, the inner conductor of a coaxial line 7 directly passes through two metal butterfly balun 4, the inner conductor of the coaxial line 7 can be protected from being shortened by medium filling 1, the outer conductors of the two coaxial lines 7 are converted into two baluns, the two baluns are positioned in orthogonal positions, the metal base 5 increases the distance between the plane of the metal radiating element 2 and the metal ground plate 6, so that higher radiation gain is realized in a lower operating frequency band, the gap between the baluns and the metal base 5 can effectively restrict the current on the outer conductor of the coaxial line, and the metal fence 8 works together with the metal ground plate 6 to reflect backward electromagnetic wave signals; the antenna has the advantages that the performance of the antenna is greatly improved by improving the feed structure and the metal radiating oscillator 2, the structure is compact, the wide impedance bandwidth from 2.3GHz to 6GHz is provided, and the isolation degree is more than 15dB; in addition, in the whole frequency band, the E plane and H plane radiation patterns are stable, the isolation between the co-polarization and the cross polarization is larger than 15dB, the high gain of the low frequency band of 6dBi and the high frequency band of 7dBi can be realized, and the application prospect is quite wide in the radio communication systems such as radar, communication, telemetry remote sensing and the like with limited platform space, particularly in the Sub-6GHz5G application field.
In this embodiment, the metal radiating element 2 includes a first metal radiating element 21, a second metal radiating element 22, a third metal radiating element 23 and a fourth metal radiating element 24, where the first metal radiating element 21 and the third metal radiating element 23 form a first dipole vibrator that is arranged in a collinear manner along a first direction, the second metal radiating element 22 and the fourth metal radiating element 24 form a second dipole vibrator that is arranged in a collinear manner along a second direction, the first direction is perpendicular to the second direction, the first slot 201 is a rectangular slot, the long edges of the rectangular slots on the first metal radiating element 21 and the third metal radiating element 23 are arranged along the second direction, and the long edges of the rectangular slots on the second metal radiating element 22 and the fourth metal radiating element 24 are arranged along the second direction, as shown in fig. 3, an included angle between the first direction and the horizontal direction is-45 °, and an included angle between the first direction and the horizontal direction is 45 °.
In this embodiment, two ends of the rectangular slot are symmetrically provided with second slots 202 which vertically penetrate through the metal radiating oscillator 2, the second slots 202 are communicated with short sides of the rectangular slot, and sides of the second slots 202 communicated with the rectangular slot are perpendicular to long sides of the rectangular slot to form an H-shaped slot; compared with the loading of the rectangular slit 201 in a straight shape, the capacitance value of the H-shaped slit is larger than that of the straight shape: c (C) H-shaped slit ＞＞C Rectangular slit The radiation performance of the antenna can be greatly improved near a high frequency band in an operating frequency band. Alternatively, the H-shaped slit has a length of 5-10 mm and a width of 1-2 mm.
In this embodiment, the second slit 202 is a sector or a polygon. Optionally, the second slit 202 is a fan shape, so that the transitivity of the circular arc edge is more, and the stability of the signal can be improved.
In this embodiment, the metal radiating resonator 2 is provided with the metal feeding probe 3, the dielectric substrate 1 is provided with the through hole 11 for penetrating through the metal feeding probe 3, the metal feeding probe 3 includes a first metal feeding probe 31, a second metal feeding probe 32, a third metal feeding probe 33 and a fourth metal feeding probe 34, the first metal feeding probe 31, the second metal feeding probe 32, the third metal feeding probe 33 and the fourth metal feeding probe 34 are respectively arranged in one-to-one correspondence with the first metal radiating resonator 21, the second metal radiating resonator 22, the third metal radiating resonator 23 and the fourth metal radiating resonator 24, the connection line of the central point of the first metal feeding probe 31 and the central point of the third metal feeding probe 33 is arranged along the first direction, the connection line of the central point of the second metal feeding probe 32 and the central point of the fourth metal feeding probe 34 is arranged along the second direction, and the metal feeding probe 3 and the metal radiating resonator 2 are welded. Alternatively, the radius of the metal feed probe 3 is 1-2 mm.
In this embodiment, the metal butterfly balun 4 includes a first metal butterfly balun 41 and a second metal butterfly balun 42, the first metal butterfly balun 41 includes a first isosceles trapezoid wing 411, a second isosceles trapezoid wing 412 and a first connecting bridge 413, the axis of the first connecting bridge 413 is arranged along a first direction, two ends of the first connecting bridge 413 are respectively connected with the short side of the first isosceles trapezoid wing 411 and the short side of the second isosceles trapezoid wing 412, the second metal butterfly balun 42 has the same structure as the first metal butterfly balun 41, the second metal butterfly balun 42 includes a third isosceles trapezoid wing 421, a fourth isosceles trapezoid wing 422 and a second connecting bridge 423, the second connecting bridge 423 of the second metal butterfly balun 42 is arranged along a second direction, and the second connecting bridge 423 is perpendicular to the different plane of the first connecting bridge 413, and the butterfly balun feed evolves from the traditional coaxial line, which is completely different from the coaxial line or any microstrip feed balun. Alternatively, the width of the metal butterfly balun 4 is 10-15 mm and the height is 8-15 mm.
In this embodiment, the coaxial line 7 is soldered to the metal feeding probe, the coaxial line 7 is a standard coaxial line, the characteristic impedance of the coaxial line 7 is 50 ohms, the coaxial line 7 includes a first coaxial line 71 and a second coaxial line 72 having the same structure, the first metal conductor core 711 of the first coaxial line 71 penetrates the first isosceles trapezoid tab 411 and is connected to the first metal feeding probe 31, the first metal outer conductor 713 of the first coaxial line 71 is connected to the third metal feeding probe 33 through the second isosceles trapezoid tab 412, a dielectric filler 712 is disposed between the first metal conductor core 711 and the first metal outer conductor 713 and between the first metal conductor core 711 and the first isosceles trapezoid tab 411, the second metal conductor core 721 of the second coaxial line 72 penetrates the third isosceles trapezoid tab 421 of the second metal butterfly balun 42 and is connected to the second metal feeding probe 32, the second metal outer conductor 723 of the second coaxial line 72 is connected to the fourth metal feeding probe 34 through the fourth isosceles trapezoid tab 422 of the second metal butterfly balun 42, and a dielectric filler 722 is disposed between the second metal conductor core 721 and the third isosceles trapezoid tab 721.
In this embodiment, a first dielectric pillar 91 is disposed between the first metal feeding probe 31 and the first isosceles trapezoid wing 411, the first dielectric pillar 91 is sleeved on the first metal conductor core 711, a second dielectric pillar 92 is disposed between the second metal feeding probe 32 and the third isosceles trapezoid wing 421, and the second dielectric pillar 92 is sleeved on the second metal conductor core 721; so as to avoid short circuit caused by contact of the metal conductor inner core of the coaxial line 7, the metal feed probe 3 and the metal butterfly balun 4. Alternatively, the relative dielectric constants of the first dielectric post 91 and the second dielectric post 92 are 2.1 to 3, and the dielectric loss angles are 0.0004 to 0.001.
In this embodiment, a third dielectric pillar 93 for abutting against the second isosceles trapezoid tab 412 and a fourth dielectric pillar 94 for abutting against the fourth isosceles trapezoid tab 422 are disposed on the metal base 5 to maintain a gap between the metal base 5 and the metal butterfly balun 4. Alternatively, the gap between the butterfly balun 31 and 32 and the metal base 5 is 0.5-1.5 mm. Alternatively, the relative dielectric constants of the third dielectric pillar 93 and the fourth dielectric pillar 94 are each 2.1 to 3, and the dielectric loss angles are each 0.0004 to 0.001.
In the present embodiment, the metal fences 8 are arranged in two rows to reduce electromagnetic wave signal leakage. Alternatively, the metal fence 8 is composed of forty metal strips, each of the forty metal strips is divided into one group, each group is divided into two rows, each row is divided into five, each metal strip is vertically inserted into a mounting hole on the metal grounding plate 6 corresponding to the metal strip and welded with the metal grounding plate 6 so as to surround the four metal radiating elements 2, and the metal fence 8 works together with the metal grounding plate 6 to reflect backward electromagnetic wave signals. Optionally, the metal thin strip is cuboid, the height of the metal thin strip is 10-25 mm, the width of the metal thin strip is 3-5 mm, and the thickness of the metal thin strip is 1-2 mm.
Example 1
Dual-polarized cross of butterfly balun feedThe specific dimension parameters of the cross dipole antenna are as follows, the units are all mm, and as shown in fig. 18, the height of the first dielectric pillar 91 is h DS =1mm, the spacing between the metal base 5 and the metal butterfly balun 4 is h slot =1mm, the diameter of the end of the metal feed probe 3 connected to the metal radiating element 2 is D p1 =4mm, diameter of the other end of the metal feed probe 3D p2 =3mm, height of third metal feed probe 3 is h probe =3mm, the thickness of the first connecting bridge 413 is h bri =1mm, the length of the first connecting bridge 413 is L bri =1.5mm, the diameter of the third dielectric column 93 is D DS3 =3mm, the height of the third dielectric column 93 is h DS3 =4.5 mm, height of metal butterfly balun 4 is h bb The height of the metal base 5 is h =10mm mp =5 mm, height of metal fence 8 is h fence The height from the bottom surface of the metal ground plate 6 to the top surface of the metal feed probe 3 is h =15 mm ant =18.5 mm; as shown in fig. 19, the spacing between two adjacent metal radiating elements 2 is g ant =0.5 mm, the maximum width of two adjacent metal radiating elements 2 is L ant =36.5 mm, rectangular slit 201 has length L aslot1 =10mm, rectangular slit 201 has width W aslot1 =3.8mm, total length of h-shaped slit L aslot2 =14.8mm, the length of the rectangular slot 201 extending from both ends of the h-shaped slot is W aslot2 =3mm, the spacing between the centers of two adjacent metal feed probes 3 is D probe =5.3 mm; as shown in fig. 20, the gap between the first isosceles trapezoid 411 and the fourth isosceles trapezoid 422 is g bb =1 mm, the length of the waist of the first isosceles trapezoid 411 is L bb1 =7mm, length of long side of first isosceles trapezoid 411 is L bb2 =11.5 mm, the length of the first metal butterfly balun 41 is L bb3 =13 mm, the width of the first connector 413 is W bri =1.5 mm, the length of the first connector 413 is L bri =3mm; as shown in FIG. 21, the length of the metal strips constituting the metal fence 8 is W as shown in FIG. 19 fence Metal strips of width t =5 mm fence =1mm, the spacing between the centers of two adjacent metal strips is dy fence Metal strips and metal =8mmThe spacing of the edges of the ground plate 6 is dx fence =5 mm, the spacing between two rows of metal bars 8 is dx fence =5 mm, length of metal ground plate 6 is L gnd ＝65mm。
FIG. 14 is a graph showing the simulation result of the absolute value of the electric field of the patch antenna when there is no gap on the metal radiating element; fig. 15 is a diagram of the simulation result of the pattern of the patch antenna when there is no slot on the metal radiating element; FIG. 16 is a graph showing the simulation result of the absolute value of the electric field of the patch antenna when H slot loading is provided on the metal radiating element; fig. 17 is a diagram showing the simulation result of the directivity pattern of the patch antenna when the loading of the H slot is provided on the metal radiating element. The antennas in fig. 15 and 17 are simulation models without the addition of a metallic ground plate. It can be seen from the simulated pattern that the electromagnetic wave signals are simultaneously radiated in the + -z direction. These figures are only used to show the difference in radiating performance of the dipole antenna before and after loading of the H-slot. The cross-polarized dipole antenna which is actually processed and meets the actual engineering requirement is provided with the metal grounding plate 6, so that electromagnetic wave signals only propagate along the +z direction, and the gain is about 3dBi higher than that of the cross-polarized dipole antenna without the metal grounding plate. The electromagnetic properties of each frequency point and patch antenna are shown in table 1.
Table 1 electromagnetic performance comparison of patch antennas at various frequency points
In table 1, (1) is a slot-loaded antenna, and (2) is an H-slot-loaded antenna, from which the data in the table can be derived:
(1) Maximum electric field: (2) 1-2 dB (V/m) higher than (1);
(2) Gain: (1) the range of (2) is-0.2057-2.775 dBi and the range of (2) is-0.434-4.174 dBi;
(3) Efficiency is that: (1) the range of (2) is-2.497 to-0.3988 dB, and the range of (5.102) to-0.4208 dB.
In conclusion, the performance of the H-shaped slot loading antenna is obviously improved.
FIG. 22 is a simulation and actual measurement of the antenna port reflection coefficient and isolation coefficient; wherein S is 11 Indicating antennaReflection coefficient of port S 21 Representing the isolation coefficients of the two ports. As can be seen from the figure, the operating frequency of the antenna is from 2.3GHz to 6GHz, and the isolation coefficient of the two ports is smaller than-15 dB.
Fig. 23 is a simulation and actual measurement result of the antenna gain; wherein, at the low end of the operating band, the gain of the antenna is approximately 6dBi; at the high end of the operating band, its gain is approximately 7dBi.
Fig. 24 is an E-plane actual measurement pattern of the antenna, fig. 24 (a) is a 3GHz result, fig. 24 (b) is a 4GHz result, fig. 24 (c) is a 5GHz result, and fig. 24 (d) is a 6GHz result; at the same time, pattern data under cross polarization is included.
Fig. 25 is an H-plane actual measurement pattern of the antenna, fig. 25 (a) is a 3GHz result, fig. 25 (b) is a 4GHz result, fig. 25 (c) is a 5GHz result, and fig. 25 (d) is a 6GHz result; at the same time, pattern data under cross polarization is included.
As can be seen from fig. 24 and 25, the antenna has stable radiation performance in the whole working frequency band, and the polarization isolation of the pattern is below-20 dB.
The butterfly balun feed dual-polarized cross dipole antenna is evolved from the traditional coaxial line, is completely different from the coaxial line or any microstrip feed balun, can realize high-performance electromagnetic radiation in an ultra-wide band from 2.3GHz to 6GHz, realizes stable radiation patterns of a wide bandwidth S11< -10dB, an E plane and an H plane from 2.3GHz to 6GHz on the whole frequency band from 2.3GHz to 6GHz, and has polarization isolation more than 15dB; furthermore, the E-plane and H-plane radiation patterns are stable throughout the frequency band. And the isolation between co-polarization and cross-polarization is greater than 15dB. The proposed antenna can achieve high gains of 6dBi for the low frequency band and 7dBi for the high frequency band; in a radio communication system such as a radar, communication, telemetry and remote sensing system with limited platform space, particularly in the Sub-6GHz5G application field, the antenna has a very broad application prospect.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A butterfly balun feed dual polarized cross dipole antenna comprising:
a dielectric substrate (1),
the cross polarization dipole vibrators are arranged on the upper surface of the dielectric substrate (1) and comprise two dipole vibrators, each dipole vibrator comprises two metal radiation vibrators (2) which are arranged in a collinear manner, gaps between two adjacent metal radiation vibrators (2) are equal,
the feed structure is arranged below the dielectric substrate (1), the feed structure comprises a metal butterfly balun (4) and a coaxial line (7), the axis of the coaxial line (7) is perpendicular to the dielectric substrate (1), the coaxial line (7) comprises a metal conductor inner core and a metal outer conductor which are coaxially arranged, the metal conductor inner core penetrates through the metal butterfly balun (4) and is connected with one metal radiating oscillator (2) of the dipole oscillator, the metal outer conductor is connected with the other metal radiating oscillator (2) of the dipole oscillator through the metal butterfly balun (4), medium filling is arranged between the metal conductor inner core and the metal outer conductor and/or between the metal conductor inner core and the metal butterfly balun (4),
a metal grounding plate (6) which is arranged in parallel with the dielectric substrate (1),
a metal base (5) arranged on the metal grounding plate (6) and positioned right below the metal butterfly balun (4), a gap is reserved between the upper surface of the metal base (5) and the bottom surface of the metal butterfly balun (4),
a metal fence (8) vertically arranged on the metal grounding plate (6) and arranged around the cross polarization dipole vibrators in a central symmetry manner, wherein the orthogonal centers of the cross polarization dipole vibrators are positioned on the central symmetry axes of the metal fences (8),
the metal radiating oscillator (2) is provided with a first gap (201) which penetrates through the metal radiating oscillator (2) up and down so as to increase the capacitance of an equivalent circuit of the butterfly balun feed dual-polarized cross dipole antenna.
2. The butterfly balun-fed dual-polarized cross dipole antenna of claim 1, wherein,
the metal radiating oscillator (2) comprises a first metal radiating oscillator (21), a second metal radiating oscillator (22), a third metal radiating oscillator (23) and a fourth metal radiating oscillator (24), wherein the first metal radiating oscillator (21) and the third metal radiating oscillator (23) form a first dipole oscillator which is arranged in a collinear way along a first direction, the second metal radiating oscillator (22) and the fourth metal radiating oscillator (24) form a second dipole oscillator which is arranged in a collinear way along a second direction, the first direction is perpendicular to the second direction,
the first slit (201) is a rectangular slit,
the long edges of the rectangular gaps on the first metal radiating oscillator (21) and the third metal radiating oscillator (23) are distributed along the second direction,
the long edges of the rectangular gaps on the second metal radiating oscillator (22) and the fourth metal radiating oscillator (24) are distributed in a second direction.
3. The butterfly balun-fed dual-polarized cross dipole antenna according to claim 2, wherein,
second gaps (202) which vertically penetrate through the metal radiating vibrators (2) are symmetrically arranged at two ends of the rectangular gaps, the second gaps (202) are communicated with short sides of the rectangular gaps, and sides, communicated with the rectangular gaps, of the second gaps (202) are perpendicular to long sides of the rectangular gaps.
4. The butterfly balun-fed dual-polarized cross dipole antenna as claimed in claim 3,
the second slit (202) is a sector or a polygon.
5. The butterfly balun feed dual-polarized cross dipole antenna according to any one of claims 2-4, characterized in that a metal feed probe (3) is arranged on the metal radiating oscillator (2), a through hole (11) for passing through the metal feed probe (3) is arranged on the dielectric substrate (1),
the metal feed probe (3) comprises a first metal feed probe (31), a second metal feed probe (32), a third metal feed probe (33) and a fourth metal feed probe (34), wherein a connecting line of the central point of the first metal feed probe (31) and the central point of the third metal feed probe (33) is arranged along a first direction, and a connecting line of the central point of the second metal feed probe (32) and the central point of the fourth metal feed probe (34) is arranged along a second direction.
6. The butterfly balun-fed dual-polarized cross dipole antenna of claim 5, wherein,
the metal butterfly balun (4) comprises a first metal butterfly balun (41) and a second metal butterfly balun (42), the first metal butterfly balun (41) comprises a first isosceles trapezoid wing piece (411), a second isosceles trapezoid wing piece (412) and a first connecting bridge (413), the axial lead of the first connecting bridge (413) is distributed along a first direction, two ends of the first connecting bridge (413) are respectively connected with the short side of the first isosceles trapezoid wing piece (411) and the short side of the second isosceles trapezoid wing piece (412),
the second metal butterfly balun (42) has the same structure as the first metal butterfly balun (41), a second connecting bridge (423) of the second metal butterfly balun (42) is arranged along a second direction, and the second connecting bridge (423) is perpendicular to the different surface of the first connecting bridge (413).
7. The butterfly balun-fed dual-polarized cross dipole antenna of claim 6, wherein,
the coaxial line (7) comprises a first coaxial line (71) and a second coaxial line (72) which are identical in structure,
the first metal conductor inner core (711) of the first coaxial line (71) penetrates through the first isosceles trapezoid wing (411) and is connected with a first metal feeding probe (31), the first metal outer conductor (713) of the first coaxial line (71) is connected with the third metal feeding probe (33) through the second isosceles trapezoid wing (412),
the second metal conductor inner core (721) of the second coaxial line (72) penetrates through the third isosceles trapezoid wing (421) of the second metal butterfly balun (42) and is connected with the second metal feeding probe (32), and the second metal outer conductor (723) of the second coaxial line (72) is connected with the fourth metal feeding probe (34) through the fourth isosceles trapezoid wing (422) of the second metal butterfly balun (42).
8. The butterfly balun-fed dual-polarized cross dipole antenna of claim 7, wherein,
a first dielectric column (91) is arranged between the first metal feed probe (31) and the first isosceles trapezoid wing (411), the first dielectric column (91) is sleeved on the first metal conductor inner core (711),
a second dielectric column (92) is arranged between the second metal feed probe (32) and the third isosceles trapezoid wing (421), and the second dielectric column (92) is sleeved on the second metal conductor inner core (721).
9. The butterfly balun-fed dual-polarized cross dipole antenna of claim 8, wherein,
a third medium column (93) used for abutting the second isosceles trapezoid wing piece (412) and a fourth medium column (94) used for abutting the fourth isosceles trapezoid wing piece (422) are arranged on the metal base (5).
10. The butterfly balun-fed dual-polarized cross dipole antenna of claim 1, wherein,
the metal fences (8) are arranged in two rows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310819275.7A CN116799498A (en) | 2023-07-05 | 2023-07-05 | Butterfly balun feed dual-polarized cross dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310819275.7A CN116799498A (en) | 2023-07-05 | 2023-07-05 | Butterfly balun feed dual-polarized cross dipole antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116799498A true CN116799498A (en) | 2023-09-22 |
Family
ID=88049556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310819275.7A Pending CN116799498A (en) | 2023-07-05 | 2023-07-05 | Butterfly balun feed dual-polarized cross dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116799498A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117766986A (en) * | 2024-01-02 | 2024-03-26 | 中国计量科学研究院 | Take reflection cavity's + -45 metal cross dipole dual polarized antenna |
-
2023
- 2023-07-05 CN CN202310819275.7A patent/CN116799498A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117766986A (en) * | 2024-01-02 | 2024-03-26 | 中国计量科学研究院 | Take reflection cavity's + -45 metal cross dipole dual polarized antenna |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108352598B (en) | Dual-polarized antenna | |
| CN104900998B (en) | Low section Bipolarization antenna for base station | |
| EP0688040A2 (en) | Bidirectional printed antenna | |
| CN111052504A (en) | Millimeter wave antenna array element, array antenna and communication product | |
| CN111262005B (en) | Dual-polarized broadband magnetoelectric dipole antenna unit suitable for 5G base station and antenna array | |
| CN111541040A (en) | Double-linear polarization and double-circular polarization four-port reconfigurable dielectric resonant antenna | |
| CN112886234B (en) | Microwave millimeter wave coplanar common-caliber antenna based on embedded structure | |
| CN108598699B (en) | Vertical polarization full wave vibrator array antenna and directional radiation antenna | |
| CN113594701A (en) | Wide-frequency-band wide-beam dual-polarized antenna based on metal cavity and parasitic dipole | |
| CN115149243A (en) | Dual-frequency dual-polarization laminated patch antenna and wireless communication equipment | |
| CN116799498A (en) | Butterfly balun feed dual-polarized cross dipole antenna | |
| CN116053776B (en) | Dual-broadband dual-polarization magneto-electric dipole base station antenna and communication equipment | |
| CN115313028B (en) | Ultra-wideband antenna applied to 2G/3G/4G/5G frequency bands | |
| CN115207613B (en) | Broadband dual-polarized antenna unit and antenna array | |
| CN115939782A (en) | W-band rotary type circularly polarized magnetoelectric dipole antenna array | |
| CN115764331A (en) | High-polarization-isolation dual-polarization tightly-coupled ultra-wideband phased array antenna | |
| CN110600869A (en) | Microstrip antenna and mobile terminal | |
| CN116759816B (en) | Dual-frequency dual-polarized antenna based on substrate integrated waveguide | |
| CN109713441B (en) | Antenna unit and array antenna | |
| CN220856921U (en) | Dipole antenna device | |
| CN112952376B (en) | Broadband millimeter wave antenna unit and antenna array | |
| CN220672851U (en) | Dual-polarized magneto-electric dipole antenna | |
| CN216648607U (en) | Circularly polarized microstrip patch antenna | |
| CN215896721U (en) | Electromagnetic dipole dielectric resonator antenna and communication equipment | |
| CN111048901B (en) | Microwave millimeter wave cross-frequency-band dual-frequency dual-polarized microstrip radiating 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 |