CN108511894B - Deformable inverted-V-shaped dipole oscillator airborne defensive antenna with double-sided antisymmetric structure - Google Patents
Deformable inverted-V-shaped dipole oscillator airborne defensive antenna with double-sided antisymmetric structure Download PDFInfo
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- CN108511894B CN108511894B CN201810166967.5A CN201810166967A CN108511894B CN 108511894 B CN108511894 B CN 108511894B CN 201810166967 A CN201810166967 A CN 201810166967A CN 108511894 B CN108511894 B CN 108511894B
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- 230000005855 radiation Effects 0.000 claims abstract description 71
- 230000009466 transformation Effects 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 17
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000010287 polarization Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
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- 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
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- 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
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/285—Aircraft wire antennas
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- 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
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- 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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Aerials (AREA)
Abstract
The invention provides a deformed inverted-V-shaped double-sided anti-symmetrical structure dipole oscillator airborne satellite antenna, which forms the complete part of the antenna through a deformed inverted-V-shaped double-sided anti-symmetrical main radiation branch, a feeder branch and a top loading auxiliary radiation branch based on the dipole antenna theory. The invention realizes the requirements of the airborne satellite antenna on standing waves, patterns and bandwidths on the premise of the preset external dimensions.
Description
Technical Field
The invention relates to a deformed inverted-V-shaped double-sided antisymmetric structure horizontal polarization dipole oscillator airborne satellite antenna, and belongs to the technical field of microwaves and radio frequency antennas.
Background
All wireless communication means are independent of the antenna, and the antenna is an outlet and an inlet in a radio frequency wireless communication system, is a conversion medium between a space electromagnetic signal and guided wave equipment, and the quality of the antenna performance directly influences the quality of the whole communication system.
Further demands are placed on the shape and size of the antenna due to the particularities of the application conditions of the on-board antenna. To meet aerodynamic requirements in flight, low aerodynamic drag (mainly shape drag) is achieved, requiring the on-board antenna to conform to the vehicle structure, the antenna needs to have a certain streamline structure.
Therefore, under the condition of the given appearance and dimension, the design of the airborne satellite antenna meeting the electrical performance index requirement has certain difficulty. Particularly in the case of broadband, horizontal polarization, is more difficult.
Disclosure of Invention
The invention aims at: the device overcomes the defects of the prior dipole antenna and the like in bandwidth and structure, and provides the inverted V-shaped dipole oscillator airborne horizontal polarization guard antenna which can meet the electrical performance index under the condition that the aircraft has requirements on the appearance and the size of the antenna.
The invention adopts the technical scheme that:
the deformed dipole airborne horizontal polarization guard antenna with the inverted V-shaped double-sided anti-symmetrical structure is characterized in that the same antenna patterns are etched on the front side and the back side of a microstrip substrate, and the etched antenna patterns on the back side of the microstrip substrate are in a configuration that the front etched antenna patterns are rotated by 180 degrees; each etched antenna pattern comprises an impedance transformation feeder line branch knot, a first microstrip dipole oscillator and a top microstrip dipole oscillator;
the first microstrip dipole oscillator comprises a first main radiation branch knot and a second main radiation branch knot, the first main radiation branch knot and the second main radiation branch knot are of inverted V-shaped structures and are identical to the included angle of the impedance transformation feeder line branch knot, the first main radiation branch knot is connected with the impedance transformation feeder line branch knot, a plurality of through holes for being electrically connected with the antenna structure corresponding to the other surface of the microstrip substrate are formed in the connecting position, the second main radiation branch knot is not communicated with the impedance transformation feeder line branch knot, and the second main radiation branch knot is electrically connected with the antenna structure corresponding to the other surface of the microstrip substrate only through the through holes formed in the second main radiation branch knot; the top microstrip dipole is not communicated with the impedance transformation feeder line branch knot and the first microstrip dipole.
The first main radiation branch and the second main radiation branch are respectively positioned at two sides of the impedance transformation feeder branch, and the length of the second main radiation branch is smaller than that of the first main radiation branch.
The included angles of the first main radiation branch knot and the second main radiation branch knot and the feeder branch knot in the vertical direction are 20 degrees.
The length of the first main radiation branch in the horizontal direction is 71.8 plus or minus 0.5mm, and the length of the first main radiation branch in the vertical direction is 215.8 plus or minus 1mm; the length of the second main radiation branch in the horizontal direction is 61.7 plus or minus 0.5mm, and the length of the second main radiation branch in the vertical direction is 188.8 plus or minus 1mm.
The top microstrip dipole oscillator comprises a horizontal branch, a first auxiliary radiation branch and a second auxiliary radiation branch; the top microstrip dipole oscillator is symmetrical about the impedance transformation feeder line branch, the first auxiliary radiation branch is parallel to the first main radiation branch, and the second auxiliary radiation branch is parallel to the second main radiation branch.
The horizontal branch and the impedance transformation feeder branch are mutually perpendicular.
The feeder branch comprises 4 sections of first branch, second branch, third branch and fourth branch with different characteristic impedance.
The width of the first branch is 8+/-0.1 mm, and the length is 8+/-1 mm; the width of the second branch is 1 plus or minus 0.1mm, and the length is 83 plus or minus 1mm; the width of the third branch is 2.4 plus or minus 0.1mm, and the length is 107 plus or minus 1mm; the width of the fourth branch is 8+/-0.1 mm, and the length is 30+/-1 mm.
The distance between the branches in the horizontal direction and the branches of the feeder line is 2+/-0.1 mm, the width of the branches in the horizontal direction is 5+/-0.1 mm, and the length is 84+/-1 mm; the junction of first pair radiation branch and horizontal direction branch is 19.5 + -0.2 mm from the adjacent end of horizontal direction branch, and first pair radiation branch width is 6.9 + -0.1 mm, length 125.5 + -1 mm.
The microstrip substrate is a double-sided copper-clad polytetrafluoroethylene substrate with the thickness of 4mm and the relative dielectric constant of 2.65.
Compared with the prior art, the invention has the following beneficial effects:
(1) The antenna provided by the invention has a simple structure, is good in consistency by adopting a printed board printing process, and is suitable for batch production. The antenna is small in size, light and thin, meets the aerodynamic characteristics required by the airborne antenna, adopts a vertical structure, and is suitable for airborne installation.
(2) The invention adopts a double-sided structure, increases the equivalent thickness of the antenna and is beneficial to the widening of the bandwidth of the antenna.
(3) In the invention, the included angle between the antenna radiation branch and the feeder line is 20 degrees, thereby not only meeting the requirement of horizontal polarization of the antenna, but also greatly reducing the transverse size of a common dipole antenna, meeting the aerodynamic requirements of an aircraft on the antenna and the like, and meeting the structural and dimensional requirements on the airborne antenna.
(4) The invention adds the top microstrip dipole oscillator structure, thereby effectively expanding the bandwidth of the antenna.
Drawings
Fig. 1 is a schematic diagram of an antenna structure according to the present invention;
FIG. 2 is a schematic view of a V-shaped dipole;
fig. 3 is an antenna pattern.
Detailed Description
The invention is further described below with reference to the drawings and the implementation.
The basic principle of the invention is based on a linear dipole antenna, and a V-shaped dipole antenna is adopted due to the size requirement of an airborne antenna. The basic structure is shown in figure 2. The arm length of the V-shaped dipole antenna is generally l/lambda>0.5, selecting proper opening angle 2 theta 0 It is possible to obtain maximum radiation on the bisector of the opening angle sandwiched by the two arms. The directivity coefficient of the V-shaped dipole antenna is
D＝120f(βl，θ 0 )R r sin 2 θ 0
Wherein R is r The radiation resistance is a value which is attributed to the antinode value of the oscillator current.
f(βl，θ 0 )＝
1+cos 2 βl+sin 2 βlcos 2 θ 0 -2cosβl*cos(βlcosθ 0 )-2cosθ 0 sinβlsin(βlcosθ 0 )
As can be seen from the above, V-shaped dipole antennas of different arm lengths have about one maximum directivity coefficient and its corresponding opening angle. In frequency determination, the longer the arm length, the greater the maximum directivity coefficient. In the invention, horizontal polarization is required, gain indexes in the range of 0 DEG and +/-60 DEG are satisfied, and proper antenna gain is obtained by adjusting arm length through simulation.
The input impedance of a V-shaped dipole antenna is generally lower than that of a straight dipole antenna of the same length. The input impedance of the V-shaped dipole antenna is calculated to be substantially the same as that of the linear dipole, except that the average characteristic impedance is
Z CA ＝120(ln(2lsinθ 0 /α)-1)
The input impedance of the V-shaped dipole antenna is low, so the invention adds the impedance transformation feeder line branch.
On the basis of the principle, the invention realizes a horizontal polarization airborne satellite antenna with the zenith of 0 degree and the gain within the range of plus or minus 60 degrees being more than-3 dBi, and the voltage standing wave ratio of the antenna in the working frequency band is less than 2.
As shown in fig. 1, based on the above requirement, the deformed dipole airborne antenna with the inverted-V-shaped double-sided antisymmetric structure provided by the invention etches antisymmetric antenna patterns on the front and back sides of the microstrip substrate, i.e. the etched antenna structure on the back side of the microstrip substrate is a pattern with the front etched antenna structure rotated 180 degrees; each etched antenna pattern comprises an impedance transformation feeder line branch knot 20, a first microstrip dipole oscillator 21 and a top microstrip dipole oscillator 22;
the first microstrip dipole oscillator 21 comprises a first main radiation branch 211 and a second main radiation branch 212, the first main radiation branch 211 and the second main radiation branch 212 are in an inverted V-shaped structure, the included angle between the first main radiation branch 211 and the impedance transformation feeder branch 20 is the same, the first main radiation branch 211 is connected with the impedance transformation feeder branch 20, a plurality of through holes for being electrically connected with the corresponding antenna structure on the other surface of the microstrip substrate are arranged at the connecting positions, the second main radiation branch 212 is not communicated with the impedance transformation feeder branch 20, and the second main radiation branch 212 is electrically connected with the corresponding antenna structure on the other surface of the microstrip substrate only through the through holes arranged on the second main radiation branch 212; the top microstrip dipole element 22 is not in communication with the impedance transformation feeder branch 20 and the first microstrip dipole element 21.
The first main radiating branch 211 and the second main radiating branch 212 are located at both sides of the impedance transforming feeder branch 20, respectively, and the length of the second main radiating branch 212 is smaller than that of the first main radiating branch 211.
The first main radiating branch 211 of the front face corresponds to the second main radiating branch 212 of the antenna structure of the back face through the through hole, and the second main radiating branch 212 of the front face corresponds to the first main radiating branch 211 of the antenna structure of the back face through the through hole. The front and back sides of the top microstrip dipole element 22 are symmetrical, and the front and back sides of the impedance transformation feeder branch 20 are symmetrical, thus forming a 180-degree rotating double-sided antisymmetric structure.
The top microstrip dipole 22 includes a horizontal branch 221, a first secondary radiating branch 222, and a second secondary radiating branch 223; the top microstrip dipole 22 is symmetrical about the impedance transformation feed line branch 20, with the first secondary radiating branch 222 being parallel to the first primary radiating branch 211 and the second secondary radiating branch 223 being parallel to the second primary radiating branch 212.
The feeder stub 20 includes 4 segments of first stub 201, second stub 202, third stub 203 and fourth stub 204 of different characteristic impedance.
In this embodiment, the angles between the first main radiation branch 211 and the second main radiation branch 212 and the vertical feeder branch 20 are 20 °. The length of the first main radiation branch 211 in the horizontal direction is 71.8 plus or minus 0.5mm, and the length of the first main radiation branch in the vertical direction is 215.8 plus or minus 1mm; the second main radiation branch 212 has a length of 61.7 + -0.5 mm in the horizontal direction and 188.8 + -1 mm in the vertical direction.
The width of the first branch 201 is 8+/-0.1 mm, and the length is 8+/-1 mm; the width of the second branch 202 is 1+/-0.1 mm, and the length is 83+/-1 mm; third branch 203 has a width of 2.4+ -0.1 mm and a length of 107+ -1 mm; the fourth branch 204 has a width of 8.+ -. 0.1mm and a length of 30.+ -. 1mm.
The horizontal branch 221 and the impedance transformation feeder branch 20 are perpendicular to each other. The distance between the horizontal branch 221 and the feeder branch 20 is 2+/-0.1 mm, the width of the horizontal branch 221 is 5+/-0.1 mm, and the length is 84+/-1 mm; the junction of the first auxiliary radiating branch 222 and the horizontal branch 221 is 19.5 + -0.2 mm from the adjacent end of the horizontal branch 221, and the width of the first auxiliary radiating branch 222 is 6.9 + -0.1 mm and the length thereof is 125.5 + -1 mm. The microstrip substrate is a double-sided copper-clad polytetrafluoroethylene substrate with the thickness of 4mm and the relative dielectric constant of 2.65.
Because the antenna belongs to a balanced antenna, a balun is added during feeding. In order to ensure the standing wave requirement of the antenna, a matching circuit is added before balun.
In this embodiment, the lumped element balun and the matching circuit are adopted in consideration of the antenna size and bandwidth requirements.
The antenna pattern is shown in fig. 3 by taking 351MHz frequency as an example, and it can be seen that the antenna has a 0 degree gain of greater than 0dB and a 60 degree gain of about-1 dB, thereby completely meeting the index requirement.
Claims (8)
1. A deformed inverted V-shaped dipole oscillator airborne satellite antenna with double-sided antisymmetric structure is characterized in that: the antenna pattern etched on the back of the microstrip substrate is a configuration of the front etched antenna pattern rotated 180 degrees; each etched antenna structure comprises an impedance transformation feeder line branch (20), a first microstrip dipole oscillator (21) and a top microstrip dipole oscillator (22);
the first microstrip dipole oscillator (21) comprises a first main radiation branch (211) and a second main radiation branch (212), the first main radiation branch (211) and the second main radiation branch (212) are of inverted V-shaped structures and are identical to an included angle of the impedance transformation feeder branch (20), the first main radiation branch (211) is connected with the impedance transformation feeder branch (20), a plurality of through holes for being electrically connected with the antenna structure corresponding to the other surface of the microstrip substrate are formed in the connecting position, the second main radiation branch (212) is not communicated with the impedance transformation feeder branch (20), and the second main radiation branch (212) is electrically connected with the antenna structure corresponding to the other surface of the microstrip substrate only through the through holes formed in the second main radiation branch (212); the top microstrip dipole (22) is not communicated with the impedance transformation feeder line branch (20) and the first microstrip dipole (21);
the first main radiation branch (211) and the second main radiation branch (212) are respectively positioned at two sides of the impedance transformation feeder branch (20), and the length of the second main radiation branch (212) is smaller than that of the first main radiation branch (211);
the top microstrip dipole oscillator (22) comprises a horizontal branch (221), a first auxiliary radiation branch (222) and a second auxiliary radiation branch (223); the top microstrip dipole oscillator (22) is symmetrical about the impedance transformation feeder branch (20), the first auxiliary radiation branch (222) is parallel to the first main radiation branch (211), and the second auxiliary radiation branch (223) is parallel to the second main radiation branch (212).
2. A deformed inverted V-shaped dipole airborne satellite antenna of double-sided antisymmetric structure as defined in claim 1, wherein: the included angles between the first main radiation branch (211) and the second main radiation branch (212) and the vertical feeder branch (20) are 20 degrees.
3. A deformed inverted V-shaped dipole airborne satellite antenna of double-sided antisymmetric structure as defined in claim 1, wherein: the length of the first main radiation branch (211) in the horizontal direction is 71.8 plus or minus 0.5mm, and the length of the first main radiation branch in the vertical direction is 215.8 plus or minus 1mm; the length of the second main radiation branch (212) in the horizontal direction is 61.7 plus or minus 0.5mm, and the length of the second main radiation branch in the vertical direction is 188.8 plus or minus 1mm.
4. A deformed inverted V-shaped dipole airborne satellite antenna of double-sided antisymmetric structure as defined in claim 1, wherein: the horizontal branch (221) and the impedance transformation feeder branch (20) are perpendicular to each other.
5. A deformed inverted V-shaped dipole airborne satellite antenna of double-sided antisymmetric structure as defined in claim 1, wherein: the feeder branch (20) comprises a first branch (201), a second branch (202), a third branch (203) and a fourth branch (204) which are connected in sequence and have different characteristic impedances.
6. A deformed inverted V-shaped double-sided antisymmetric structure dipole airborne satellite antenna according to claim 5, wherein: the width of the first branch knot (201) is 8+/-0.1 mm, and the length is 8+/-1 mm; the width of the second branch (202) is 1+/-0.1 mm, and the length is 83+/-1 mm; the width of the third branch knot (203) is 2.4 plus or minus 0.1mm, and the length is 107 plus or minus 1mm; the width of the fourth branch (204) is 8+/-0.1 mm, and the length is 30+/-1 mm.
7. A deformed inverted V-shaped dipole airborne satellite antenna of double-sided antisymmetric structure as defined in claim 1, wherein: the distance between the horizontal branch (221) and the feeder branch (20) is 2+/-0.1 mm, the width of the horizontal branch (221) is 5+/-0.1 mm, and the length is 84+/-1 mm; the distance between the junction of the first auxiliary radiation branch (222) and the horizontal branch (221) and the adjacent end of the horizontal branch (221) is 19.5 plus or minus 0.2mm, the width of the first auxiliary radiation branch (222) is 6.9 plus or minus 0.1mm, and the length is 125.5 plus or minus 1mm.
8. A deformed inverted V-shaped dipole airborne satellite antenna of double-sided antisymmetric structure as defined in claim 1, wherein: the microstrip substrate is a double-sided copper-clad polytetrafluoroethylene substrate with the thickness of 4mm and the relative dielectric constant of 2.65.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810166967.5A CN108511894B (en) | 2018-02-28 | 2018-02-28 | Deformable inverted-V-shaped dipole oscillator airborne defensive antenna with double-sided antisymmetric structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810166967.5A CN108511894B (en) | 2018-02-28 | 2018-02-28 | Deformable inverted-V-shaped dipole oscillator airborne defensive antenna with double-sided antisymmetric structure |
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| Publication Number | Publication Date |
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| CN108511894A CN108511894A (en) | 2018-09-07 |
| CN108511894B true CN108511894B (en) | 2024-01-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020066521A (en) * | 2001-02-12 | 2002-08-19 | (주)하이파워텔레콤 | Dual band broadband microstrip antenna using inverted V-type ground |
| CN102738573A (en) * | 2012-06-09 | 2012-10-17 | 陕西凌云电器集团有限公司 | Airborne navigation antenna |
| CN105161835A (en) * | 2015-08-19 | 2015-12-16 | 南京邮电大学 | Wide-beam planar circularly polarized antenna |
| CN107221745A (en) * | 2017-05-03 | 2017-09-29 | 西安电子科技大学 | A kind of airborne ultra-short wave broadband blade antenna |
| CN207910058U (en) * | 2018-02-28 | 2018-09-25 | 中国人民解放军空军研究院航空兵研究所 | A kind of two-sided antisymmetry structure dipole element of the inverted V-shaped of deformation is airborne to defend exceedingly high line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1178568A4 (en) * | 2000-03-10 | 2003-03-26 | Nippon Antenna Kk | Cross dipole antenna and composite antenna |
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2018
- 2018-02-28 CN CN201810166967.5A patent/CN108511894B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020066521A (en) * | 2001-02-12 | 2002-08-19 | (주)하이파워텔레콤 | Dual band broadband microstrip antenna using inverted V-type ground |
| CN102738573A (en) * | 2012-06-09 | 2012-10-17 | 陕西凌云电器集团有限公司 | Airborne navigation antenna |
| CN105161835A (en) * | 2015-08-19 | 2015-12-16 | 南京邮电大学 | Wide-beam planar circularly polarized antenna |
| CN107221745A (en) * | 2017-05-03 | 2017-09-29 | 西安电子科技大学 | A kind of airborne ultra-short wave broadband blade antenna |
| CN207910058U (en) * | 2018-02-28 | 2018-09-25 | 中国人民解放军空军研究院航空兵研究所 | A kind of two-sided antisymmetry structure dipole element of the inverted V-shaped of deformation is airborne to defend exceedingly high line |
Non-Patent Citations (1)
| Title |
|---|
| 机载通信天线辐射特性分析;高军;曹祥玉;刘涛;;西安电子科技大学学报(第04期);全文 * |
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