CN114944555A - Sector dipole circularly polarized antenna - Google Patents
Sector dipole circularly polarized antenna Download PDFInfo
- Publication number
- CN114944555A CN114944555A CN202210659626.8A CN202210659626A CN114944555A CN 114944555 A CN114944555 A CN 114944555A CN 202210659626 A CN202210659626 A CN 202210659626A CN 114944555 A CN114944555 A CN 114944555A
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- dimensional
- shaped dipole
- dipole unit
- dimensional fan
- sector
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- 239000002184 metal Substances 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims description 24
- 230000005855 radiation Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000010287 polarization Effects 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- H01Q9/18—Vertical disposition of the antenna
-
- 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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a design method of a sector dipole circularly polarized antenna, and belongs to the technical field of Internet of things and microwaves. The antenna consists of a pair of two-dimensional sector dipole units, two pairs of tuning branches, a feed cable and a circular metal reflector. The angular difference of central angles between the two-dimensional fan-shaped dipole units is used for realizing a 90-degree time phase difference, so that circularly polarized radiation is generated, tuning branches are added, a high-order mode is fully excited by using a branch disturbance mode and shifts to a low frequency, and the bandwidth of the antenna is widened. The invention has the advantages of front-to-back ratio of more than 40dB, simple structure, low manufacturing cost and the like, and can be applied to the fields of microwave, RFID, WLAN, satellite navigation, Internet of things and the like.
Description
Technical Field
The invention relates to a sector dipole circularly polarized antenna, and belongs to the technical field of Internet of things and microwaves.
Background
Circularly polarized antennas are widely used in satellite navigation, RFID (radio frequency identification), WLAN (wireless local area network), and other fields. However, it is a difficult problem to realize a circular polarization antenna with a simple structure, low cost and good wide beam performance. Aiming at the problems, the invention provides a design method of a sector dipole circularly polarized antenna based on a two-dimensional current sheet resonance principle. A pair of fan-shaped dipoles (equivalent to a two-dimensional current sheet with TE mode resonance) vertically arranged in space is utilized, and the time phase difference of the two-dimensional current sheets is controlled by adjusting the difference value of central angles of the two dipoles and the two dipole, so that the circularly polarized radiation conditions of constant amplitude excitation and 90-degree time phase difference are realized. The antenna has a front-to-back ratio of more than 40dB, is simple in structure and low in manufacturing cost, does not need an additional 90-degree hybrid bridge as a feed device, and can be applied to the fields of microwave, RFID, WLAN, satellite navigation, Internet of things and the like.
Disclosure of Invention
The invention provides a sector dipole circular polarization antenna, which is characterized in that a 90-degree time phase difference is realized through the angle difference of central angles between two-dimensional sector dipole units so as to generate circular polarization radiation, tuning branches are introduced to the periphery of the sector dipole units, and high-order modes are fully excited and shifted to low frequency by using a branch disturbance mode so as to widen the bandwidth of the antenna. The antenna designed by the invention has good circular polarization characteristic, simple structure and low manufacturing cost, and can be applied to the fields of microwave, RFID, WLAN, satellite navigation, Internet of things and the like.
The invention adopts the following technical scheme for solving the technical problems:
a sector dipole circular polarization antenna comprises a feed cable, a circular metal reflector, a first two-dimensional sector dipole unit and a second two-dimensional sector dipole unit, wherein the first two-dimensional sector dipole unit and the second two-dimensional sector dipole unit are arranged in a cross shape, a left arm and a right arm of the first two-dimensional sector dipole unit are parallel, a left arm and a right arm of the second two-dimensional sector dipole unit are parallel, the left arm of the first two-dimensional sector dipole unit is perpendicular to the left arm of the second two-dimensional sector dipole unit, and the right arm of the first two-dimensional sector dipole unit is perpendicular to the right arm of the second two-dimensional sector dipole unit;
the first two-dimensional fan-shaped dipole unit and the second two-dimensional fan-shaped dipole unit are arranged above the circular metal reflector and are connected with the circular metal reflector through feed cables;
be equipped with the fluting that divides the outer conductor into two halves on the outer conductor of feeder cable, wherein: an outer conductor is not connected with the inner conductor, and a straight edge of the left arm of the first two-dimensional fan-shaped dipole unit, which is vertical to the circular metal reflector, and a straight edge of the left arm of the second two-dimensional fan-shaped dipole unit, which is vertical to the circular metal reflector, are attached to the surface of the outer conductor; the other half of the outer conductor is connected with the inner conductor, and the straight edge of the right arm of the first two-dimensional fan-shaped dipole unit, which is perpendicular to the circular metal reflector, and the straight edge of the right arm of the second two-dimensional fan-shaped dipole unit, which is perpendicular to the circular metal reflector, are attached to the surface of the other half of the outer conductor.
Further, the method comprises the following steps: the first two-dimensional fan-shaped dipole unit and the second two-dimensional fan-shaped dipole unit are respectively provided with a pair of tuning branches.
Further, the method comprises the following steps: the length of the tuning branch on the first two-dimensional fan-shaped dipole unit is 0.06 wavelength to 0.12 wavelength, and the width is 0.03 wavelength to 0.05 wavelength.
Further: the length of the tuning branch on the second two-dimensional fan-shaped dipole unit is 0.06 wavelength to 0.12 wavelength, and the width is 0.03 wavelength to 0.05 wavelength.
Further: the central angles of the first two-dimensional fan-shaped dipole unit and the second two-dimensional fan-shaped dipole unit are not equal, and the 90-degree time phase difference is realized by utilizing the angle difference of the two central angles, so that circularly polarized radiation is generated.
Further: the central angle range of the first two-dimensional fan-shaped dipole unit is 220-240 degrees, and the central angle range of the second two-dimensional fan-shaped dipole unit is 300-320 degrees.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
according to the invention, the 90-degree time phase difference is realized through the angle difference of the central angles between the two-dimensional fan-shaped dipole units, so that circularly polarized radiation is generated, tuning branches are introduced at the periphery of the fan-shaped dipole units, and a high-order mode is fully excited and shifted to a low frequency by using a branch disturbance mode, so that the bandwidth of an antenna is widened.
Drawings
FIG. 1 is a schematic three-dimensional view of an antenna and a reference coordinate diagram;
FIG. 2 is a top view of the antenna;
fig. 3 is a schematic plan view of the fan-shaped dipole unit 1;
fig. 4 is a schematic plan view of the fan-shaped dipole unit 2;
FIG. 5 is a plot of antenna reflection coefficient characteristics calculated using HFSS software;
FIG. 6 is a plot of antenna axial ratios calculated using HFSS software;
FIG. 7 is an antenna pattern plotted using HFSS software;
wherein, 1, 2 are fan-shaped dipole units, 1 ', 2 ' are arms of the fan-shaped dipole units, 3 ', 4 ' are tuning branches, 5 is a feed cable, 5 ' is a slot, and 6 is a circular metal reflector.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and are not construed as limiting the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The technical scheme of the invention is further explained in detail by combining the attached drawings:
in one embodiment, referring to fig. 1, 2, 3, and 4, a sector-shaped dipole circular polarization antenna is provided, which includes a feed cable 5, a circular metal reflector 6, a two-dimensional sector-shaped dipole unit 1, and a two-dimensional sector-shaped dipole unit 2, where the two-dimensional sector-shaped dipole unit 1 and the two-dimensional sector-shaped dipole unit 2 are arranged in a crisscross manner, a left arm 1 'and a right arm 1 "of the two-dimensional sector-shaped dipole unit 1 are parallel, a left arm 2' and a right arm 2" of the two-dimensional sector-shaped dipole unit 2 are parallel, a left arm 1 'of the two-dimensional sector-shaped dipole unit 1 is perpendicular to a left arm 2' of the two-dimensional sector-shaped dipole unit 2, and a right arm 1 "of the two-dimensional sector-shaped dipole unit 1 is perpendicular to a right arm 2" of the two-dimensional sector-shaped dipole unit 2.
The two-dimensional fan-shaped dipole unit 1 and the two-dimensional fan-shaped dipole unit 2 are arranged above the circular metal reflector 6 and are connected with the circular metal reflector 6 through a feed cable 5.
The outer conductor of the feeder cable 5 is provided with a slot 5' dividing the outer conductor into two halves, wherein: an outer conductor is not connected with the inner conductor, and the straight edge of the left arm 1 'of the two-dimensional fan-shaped dipole unit 1, which is vertical to the circular metal reflector 6, and the straight edge of the left arm 2' of the two-dimensional fan-shaped dipole unit 2, which is vertical to the circular metal reflector 6, are attached to the surface of the outer conductor; the other half of the external conductor is connected with the internal conductor, and the straight edge of the right arm 1 'of the two-dimensional fan-shaped dipole unit 1, which is vertical to the circular metal reflector 6, and the straight edge of the right arm 2' of the two-dimensional fan-shaped dipole unit 2, which is vertical to the circular metal reflector 6, are both attached to the surface of the other half of the external conductor.
In one embodiment, an air medium is adopted, the radii of two-dimensional fan-shaped dipole units are both 29mm, the field angles are 230 ° and 310 ° respectively, the lengths of tuning branches are both 10mm, the widths thereof are both 5.8mm, the radius of a circular metal reflector is 65mm, and HFSS software is used to perform simulation calculation on the antenna to obtain various characteristics of the antenna:
FIG. 5 is the reflection coefficient characteristic of the antenna calculated by HFSS software, the impedance bandwidth of the antenna covers the frequency band of 2.21-2.47GHz, the center frequency is 2.34GHz, and the relative bandwidth reaches 11.11%;
FIG. 6 is an antenna axial ratio characteristic calculated using HFSS software, and FIG. 5 shows an antenna axial ratio bandwidth of 2.27-2.30 GHz;
fig. 7 is a radiation pattern of the antenna calculated using HFSS software, the solid line is the pattern at a frequency of 2.4GHz indicating right hand circular polarization, and the dashed line is the pattern at a frequency of 2.4GHz indicating left hand circular polarization, wherein the front-to-back ratio of the antenna reaches 40 dB.
In summary, in a design method of a sector dipole circularly polarized antenna, firstly, a 90 ° time phase difference is realized by using an angle difference between central angles of two-dimensional sector dipole units, so as to generate circularly polarized radiation, and meanwhile, tuning branches are introduced, so that a high-order mode is sufficiently excited and shifted to a low frequency by using a branch disturbance mode, thereby widening the bandwidth of the antenna. The antenna has the advantages of simple structure and low manufacturing cost, and can be applied to the fields of microwave, RFID, WLAN, satellite navigation, Internet of things and the like.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions within the technical scope of the present invention are included in the scope of the present invention, and therefore, the scope of the present invention should be subject to the protection scope of the claims.
Claims (6)
1. A sector dipole circularly polarized antenna is characterized by comprising a feed cable (5), a circular metal reflector (6), a first two-dimensional sector dipole unit (1) and a second two-dimensional sector dipole unit (2), the first two-dimensional fan-shaped dipole unit (1) and the second two-dimensional fan-shaped dipole unit (2) are arranged in a cross shape, the left arm (1 ') and the right arm (1') of the first two-dimensional fan-shaped dipole unit (1) are parallel, the left arm (2 ') and the right arm (2') of the second two-dimensional fan-shaped dipole unit (2) are parallel, the left arm (1 ') of the first two-dimensional fan-shaped dipole unit (1) is vertical to the left arm (2') of the second two-dimensional fan-shaped dipole unit (2), the right arm (1 ') of the first two-dimensional fan-shaped dipole unit (1) is perpendicular to the right arm (2') of the second two-dimensional fan-shaped dipole unit (2);
the first and second two-dimensional fan-shaped dipole units (1) are arranged above the circular metal reflector (6) and are connected with the circular metal reflector (6) through a feed cable (5);
the outer conductor of the feed cable (5) is provided with a slot (5') which divides the outer conductor into two parts, wherein: an outer conductor is not connected with the inner conductor, and a straight edge perpendicular to the circular metal reflector (6) in the left arm (1 ') of the first two-dimensional fan-shaped dipole unit (1) and a straight edge perpendicular to the circular metal reflector (6) in the left arm (2') of the second two-dimensional fan-shaped dipole unit (2) are attached to the surface of the outer conductor; the other half of the outer conductor is connected with the inner conductor, and a straight edge perpendicular to the circular metal reflector (6) in the right arm (1 ") of the first two-dimensional fan-shaped dipole unit (1) and a straight edge perpendicular to the circular metal reflector (6) in the right arm (2") of the second two-dimensional fan-shaped dipole unit (2) are attached to the surface of the other half of the outer conductor.
2. The sector dipole circularly polarized antenna of claim 1, wherein: the first two-dimensional fan-shaped dipole unit (1) and the second two-dimensional fan-shaped dipole unit (2) are respectively provided with a pair of tuning branches (3, 3').
3. The sector dipole circularly polarized antenna of claim 2, wherein: the tuning branches (3, 3') on the first two-dimensional fan-shaped dipole unit (1) have the length of 0.06 wavelength to 0.12 wavelength and the width of 0.03 wavelength to 0.05 wavelength.
4. The sector dipole circularly polarized antenna of claim 2, wherein: the tuning branches (4, 4') on the second two-dimensional fan-shaped dipole unit (2) have a length of 0.06 wavelength to 0.12 wavelength and a width of 0.03 wavelength to 0.05 wavelength.
5. The sector dipole circularly polarized antenna of claim 1, wherein: the central angles of the first two-dimensional fan-shaped dipole unit (1) and the second two-dimensional fan-shaped dipole unit (2) are not equal.
6. The sector dipole circularly polarized antenna of claim 1, wherein: the central angle range of the first two-dimensional fan-shaped dipole unit (1) is 220-240 degrees, and the central angle range of the second two-dimensional fan-shaped dipole unit (2) is 300-320 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210659626.8A CN114944555B (en) | 2022-06-13 | 2022-06-13 | Sector dipole circularly polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210659626.8A CN114944555B (en) | 2022-06-13 | 2022-06-13 | Sector dipole circularly polarized antenna |
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| Publication Number | Publication Date |
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| CN114944555A true CN114944555A (en) | 2022-08-26 |
| CN114944555B CN114944555B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210659626.8A Active CN114944555B (en) | 2022-06-13 | 2022-06-13 | Sector dipole circularly polarized antenna |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6271800B1 (en) * | 1999-10-14 | 2001-08-07 | Takashi Nakamura | Circularly polarized cross dipole antenna |
| CN201219133Y (en) * | 2008-06-02 | 2009-04-08 | 烟台宏益微波科技有限公司 | Broad-band wide-beam circularly polarized antenna |
| CN102484320A (en) * | 2009-08-03 | 2012-05-30 | 温提集团有限责任公司 | Cross-dipole Antenna |
| CN103490152A (en) * | 2013-09-13 | 2014-01-01 | 华侨大学 | Broadband dual-polarized printed dipole antenna capable of integrating balun feeds |
| US20140111396A1 (en) * | 2012-10-19 | 2014-04-24 | Futurewei Technologies, Inc. | Dual Band Interleaved Phased Array Antenna |
| CN107240766A (en) * | 2017-06-09 | 2017-10-10 | 合肥工业大学 | A kind of ultra wide band all-metal circular polarized antenna unit |
| CN107275765A (en) * | 2017-05-18 | 2017-10-20 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | It is a kind of from the broadband circle polarized cross dipole antenna of phase shift |
| CN110518359A (en) * | 2019-08-21 | 2019-11-29 | 南京邮电大学 | A kind of fan-shaped double humorous dipole antennas |
-
2022
- 2022-06-13 CN CN202210659626.8A patent/CN114944555B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6271800B1 (en) * | 1999-10-14 | 2001-08-07 | Takashi Nakamura | Circularly polarized cross dipole antenna |
| CN201219133Y (en) * | 2008-06-02 | 2009-04-08 | 烟台宏益微波科技有限公司 | Broad-band wide-beam circularly polarized antenna |
| CN102484320A (en) * | 2009-08-03 | 2012-05-30 | 温提集团有限责任公司 | Cross-dipole Antenna |
| US20140111396A1 (en) * | 2012-10-19 | 2014-04-24 | Futurewei Technologies, Inc. | Dual Band Interleaved Phased Array Antenna |
| CN103490152A (en) * | 2013-09-13 | 2014-01-01 | 华侨大学 | Broadband dual-polarized printed dipole antenna capable of integrating balun feeds |
| CN107275765A (en) * | 2017-05-18 | 2017-10-20 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | It is a kind of from the broadband circle polarized cross dipole antenna of phase shift |
| CN107240766A (en) * | 2017-06-09 | 2017-10-10 | 合肥工业大学 | A kind of ultra wide band all-metal circular polarized antenna unit |
| CN110518359A (en) * | 2019-08-21 | 2019-11-29 | 南京邮电大学 | A kind of fan-shaped double humorous dipole antennas |
Non-Patent Citations (1)
| Title |
|---|
| 卢红 等: "宽频带圆极化交叉偶极子天线设计", 《测试技术学报》 * |
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| CN114944555B (en) | 2023-12-08 |
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