CN110690564A - Dual-polarized log-periodic antenna, dual-unit structure antenna and antenna array - Google Patents
Dual-polarized log-periodic antenna, dual-unit structure antenna and antenna array Download PDFInfo
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- CN110690564A CN110690564A CN201911119825.4A CN201911119825A CN110690564A CN 110690564 A CN110690564 A CN 110690564A CN 201911119825 A CN201911119825 A CN 201911119825A CN 110690564 A CN110690564 A CN 110690564A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/10—Logperiodic 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
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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Abstract
The invention relates to a dual-polarized log-periodic antenna, a dual-unit structure antenna and an antenna array. The dual-polarization log periodic antenna comprises an antenna main body consisting of four assembly lines, a feed coaxial line tightly attached to the assembly lines and a plurality of antenna oscillators arranged on the assembly lines in an alternating equidistant parallel mode, and the feed coaxial line penetrates through a through hole in the assembly line and is connected to the other assembly line opposite to the assembly line. According to the structure, the characteristic that the antenna has good gain in the vertical and horizontal directions is realized through dual polarization, meanwhile, the symmetrical structure ensures the symmetry of antenna radiation, and the length of the aggregation line and the number of the antenna oscillators can be adjusted to realize high gain.
Description
Technical Field
The invention relates to the field of antenna equipment and technology, in particular to a dual-polarized log-periodic antenna, a dual-unit structure antenna and an antenna array.
Background
The log periodic antenna is a common antenna, has the characteristics of broadband and line planning due to the periodic working structure, and is widely applied to the fields of short-wave communication and microwave communication.
Disclosure of Invention
Therefore, it is necessary to provide a dual-polarized log-periodic antenna, a dual-unit antenna and an antenna array for solving the problems of large loss and low gain of the polarized signal of the single-polarized log-periodic antenna.
A dual polarized log periodic antenna comprising:
the antenna main body comprises four same aggregation lines, namely a first aggregation line, a second aggregation line, a third aggregation line and a fourth aggregation line, which are sequentially arranged around a space axis, wherein the first aggregation line and the third aggregation line are oppositely arranged, the second aggregation line and the fourth aggregation line are oppositely arranged, a connecting line between a midpoint of the first aggregation line and a midpoint of the third aggregation line is perpendicular to a connecting line between the midpoint of the second aggregation line and the midpoint of the fourth aggregation line, a foot is hung on the space axis, and the first aggregation line, the second aggregation line, the third aggregation line and the fourth aggregation line respectively comprise a first end and a second end; the antenna elements are alternately arranged on two sides of the first aggregation line relative to the space axis direction at equal intervals in sequence from the first end to the second end of the first aggregation line, and the shorter the length of the antenna element close to the second end of the first aggregation line, the antenna elements on the first aggregation line are parallel to each other and are positioned on the same plane; a plurality of antenna oscillators are also arranged on the second aggregation line, the third aggregation line and the fourth aggregation line respectively, and the arrangement mode of the antenna oscillators is the same as that of the antenna oscillators of the first aggregation line;
the first coaxial line and the second coaxial line are respectively arranged on the first aggregation line and the second aggregation line and comprise an inner conductor, an insulating medium layer and an outer conductor layer which are coaxially arranged, and the first coaxial line and the second coaxial line are respectively arranged on the first aggregation line and the second aggregation line
The outer conductor layer of the second coaxial line is respectively attached to one sides, far away from the space axis, of the first gathering line and the second gathering line;
the first set line with the second end of second set line still is provided with first through-hole and second through-hole respectively, the shape and the size of first through-hole and second through-hole respectively with first coaxial line and second coaxial line suit, the output of first coaxial line and second coaxial line is connected to respectively first through-hole and second through-hole, just the inner conductor of first coaxial line and second coaxial line passes respectively first through-hole with the second through-hole is connected to the third set line with the fourth set line.
In one embodiment, each of the collective lines has a rectangular parallelepiped shape.
In one embodiment, the dual-polarized log-periodic antenna further comprises:
a third coaxial line disposed on the third collective line, symmetrical to the first coaxial line with respect to the spatial axis;
and the fourth coaxial line is arranged on the fourth collecting line and is symmetrical to the second coaxial line about the space axis.
In one embodiment, the first set line, the third set line, and the input impedance of the first antenna single-polarization structure formed by the first coaxial line, the third coaxial line and the antenna element arranged on the first set line and the third set line, and the input impedance of the second antenna single-polarization structure formed by the second coaxial line, the fourth coaxial line and the antenna element arranged on the second set line and the fourth set line are both 50 ohms.
In one embodiment, the wires of the first coaxial line, the second coaxial line, the third coaxial line and the fourth coaxial line are 50 ohm coaxial lines.
In one embodiment, the opening height of the first through hole is higher than that of the second through hole.
In one embodiment, the dual-polarized log-periodic antenna further comprises:
a first reflection plate disposed at a first end of the antenna main body.
A dual-element structure antenna comprising:
a first antenna and a second antenna, the first antenna and the second antenna being dual-polarized log-periodic antennas of any of the above embodiments;
the power divider comprises a first power divider and a second power divider, wherein the first power divider and the second power divider are one-to-two power dividers;
the first coaxial line of the first antenna and the input end of the second coaxial line of the first antenna are respectively connected to the first output ports of the first power divider and the second power divider, and the first coaxial line of the second antenna and the input end of the second coaxial line of the second antenna are respectively connected to the second output ports of the first power divider and the second power divider.
In one embodiment, the dual-element structure antenna further includes:
and the first power divider and the second power divider are arranged on the second reflector, and the plane where the double-unit structure antenna is arranged is vertical to the plane where the second reflector is arranged.
An antenna array comprises a plurality of antennas with the double-unit structure, wherein the antennas with the double-unit structure are uniformly or regularly arranged on the same third reflecting plate, and the planes of the antennas with the double-unit structure are vertical to the plane of the third reflecting plate.
Above-mentioned dual polarization log periodic antenna, two unit structure antennas and antenna array realize the dual polarization constitution of two single polarization antenna unit through adopting the cross structure, have realized dual polarization log periodic antenna, reducible signal polarization loss, make the gain of the horizontal perpendicular dual direction of antenna all good, and the assembly line of every antenna and the antenna element that sets up on it all can the piecemeal dismouting realize simultaneously, simple structure, the installation of being convenient for.
Drawings
FIG. 1 is a schematic diagram of a dual-polarized log-periodic antenna structure according to an embodiment;
FIG. 2 is a partial schematic view of a coaxial wire structure according to an embodiment;
FIG. 3 is a cross-sectional view of a portion of a dual-polarized log-periodic antenna in one embodiment;
FIG. 4 is a top view of a dual polarized log periodic antenna according to one embodiment;
FIG. 5 is a schematic diagram of an antenna monopole structure according to an embodiment;
fig. 6 is a schematic structural diagram of an antenna with a dual-element structure according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 1, the dual polarized log periodic antenna of the present disclosure includes an antenna body 110, an antenna element 120, a first coaxial line 130 and a second coaxial line 140.
The antenna main body 110 includes four identical aggregation lines, which are a first aggregation line 111, a second aggregation line 112, a third aggregation line 113, and a fourth aggregation line 114, respectively, and the four aggregation lines are sequentially disposed around a spatial axis, wherein the first aggregation line 111 is disposed opposite to the third aggregation line 113, and the second aggregation line 112 is also disposed opposite to the fourth aggregation line 114. Meanwhile, a connecting line between the middle point of the first aggregation line 111 and the middle point of the third aggregation line 113 is perpendicular to a connecting line between the middle point of the second aggregation line 112 and the middle point of the fourth aggregation line 114, and the connecting lines are hung on the spatial axis, namely the four aggregation lines are not staggered, but are arranged in a length alignment manner, so that the antenna keeps relatively symmetrical and stable structure as much as possible.
The first coaxial line 130 and the second coaxial line 140 are respectively disposed on the first collective line 111 and the second collective line 112, as shown in fig. 2, the first coaxial line 130 and the second coaxial line 140 each include an inner conductor 131, an insulating dielectric layer 132, and an outer conductor layer 133 that are coaxially disposed, and the insulating dielectric layer 132 is disposed between the inner conductor 131 and the outer conductor layer 133 to ensure that they do not contact each other. When the coaxial cable is arranged, the outer conductor layers 133 of the first coaxial line 130 and the second coaxial line 140 are respectively attached to the outer sides, far away from the space axis, of the first aggregation line 111 and the second aggregation line 112 so as to generate a potential difference.
Referring to fig. 3, the top ends of the first aggregation line 111 and the second aggregation line 112 are respectively provided with a first through hole 150 and a second through hole 160, the first through hole 150 and the second through hole 160 may have shapes and sizes corresponding to the first coaxial line 130 and the second coaxial line 140, and may also be larger or smaller than the cross section of the coaxial line, the coaxial line disposed on the aggregation line may connect the output end to the through hole on the aggregation line where the coaxial line is located, and further, the inner conductor of the aggregation line connected to the through hole may further extend continuously and is connected to the aggregation line opposite to the aggregation line where the coaxial line is located through the through hole to form a feeding structure. For example, the output end of the second coaxial line 140 disposed on the second aggregation line 112 is connected to the second via 160, while the inner conductor of the output end of the second coaxial line 140 further extends through the second via 160 to be connected to the fourth coaxial line 114, and the arrangement of the first aggregation line 111 and the first coaxial line 130 is also the same, which is not described herein.
In one embodiment, each collective line constituting the antenna body is shaped as a rectangular parallelepiped to facilitate mounting of components such as an antenna element, a coaxial line, and the like.
As shown in fig. 1 and 4, in one embodiment, the dual-polarized log-periodic antenna further includes a third coaxial line 170 and a fourth coaxial line 180 respectively disposed on the third collective line 113 and the fourth collective line 114, and the third coaxial line 170 is symmetrical to the first coaxial line 130 about the aforementioned spatial axis, and the fourth coaxial line 180 and the second coaxial line 140 are symmetrical about the aforementioned spatial axis. In one embodiment, the third coaxial line 170 may also be equal in length to the first coaxial line 130, and the fourth coaxial line 180 may be equal in length to the second coaxial line 140. In another embodiment, the third coaxial line 170 is identical to the first coaxial line 130 and the fourth coaxial line 180 is identical to the second coaxial line 140. The coaxial lines symmetrical to the first coaxial line 130 and the second coaxial line 140 are arranged, so that structural symmetry of the dual-polarized log periodic antenna can be guaranteed, symmetry of radiation characteristics of the antenna can be guaranteed, and antenna performance can be improved.
As shown in fig. 5, in one embodiment, the input impedance of the first and third aggregation lines 111 and 113 and the first antenna single-polarization structure formed by the first and third coaxial lines 130 and 170 and the antenna element disposed on the first and third aggregation lines 111 and 113 is 50 ohms. The input impedance of the second antenna single-polarization structure composed of the second collective line 112 and the fourth collective line 114, and the second coaxial line 140, the fourth coaxial line 180, and the antenna element provided on the second collective line 112 and the fourth collective line 114 is also 50 ohms. The dual-polarized log periodic antenna does not need an impedance transformer, can directly adopt a 50-ohm coaxial line for feeding, is convenient and stable, and has strong adaptability. Further, in one embodiment, the wires of the first coaxial line 130, the second coaxial line 140, the third coaxial line 170, and the fourth coaxial line 180 are all 50 ohm coaxial lines.
In one embodiment, the first through hole 150 is opened closer to the top end than the second through hole 160, so that the inner conductors of the first coaxial line 130 and the second coaxial line 140 are not overlapped when being connected to the third aggregation line 113 and the fourth aggregation line 114, respectively, to avoid interference.
In one embodiment, the dual-polarized structure antenna may further include a reflection plate disposed at the bottom end of the antenna body to increase a front-to-back ratio of the antenna and improve antenna performance.
Referring to fig. 6, the present application further discloses a dual-element antenna, which includes a first antenna, a second antenna, a first power divider, and a second power divider.
The first antenna 210 and the second antenna 220 are both dual-polarized log periodic antennas in any of the above embodiments, and serve as two elements of a dual-element antenna.
The first power divider 230 and the second power divider 240 are both a two-to-two power divider and both include a first output port and a second output port corresponding to each other, the input ends of the first coaxial line 211 and the second coaxial line 212 of the first antenna 210 are respectively connected to the first output port 231 of the first power divider 230 and the first output port 241 of the second power divider 240, and the input ends of the first coaxial line 221 and the second coaxial line 222 of the second antenna 220 are respectively connected to the second output port 232 of the first power divider and the second output port 242 of the second power divider to receive feeding. Further, the first antenna 210 and the first power divider 230 may be symmetrically disposed with the second antenna 220 and the second power divider 240, so as to ensure structural symmetry of the antenna with a dual-unit structure and improve symmetry of antenna radiation.
In one embodiment, the dual-unit antenna may be further disposed on the reflection plate, and in particular, the first power divider and the second power divider may be disposed on the reflection plate while maintaining the dual-unit antenna perpendicular to the reflection plate, so as to further enhance the antenna performance.
In one embodiment, the gain of the dual element structure antenna is 12 dB.
The application also discloses an antenna array, which comprises a plurality of double-unit structure antennas in the above embodiments, wherein the plurality of double-unit structure antennas are randomly or regularly arranged on a reflecting plate according to actual requirements to form an array, and the plurality of double units are perpendicular to the reflecting plate to ensure that the reflecting plate can enhance the front-to-back ratio of the antenna.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A dual polarized log periodic antenna, comprising:
the antenna main body comprises four same aggregation lines, namely a first aggregation line, a second aggregation line, a third aggregation line and a fourth aggregation line, which are sequentially arranged around a space axis, wherein the first aggregation line and the third aggregation line are oppositely arranged, the second aggregation line and the fourth aggregation line are oppositely arranged, a connecting line between a midpoint of the first aggregation line and a midpoint of the third aggregation line is perpendicular to a connecting line between the midpoint of the second aggregation line and the midpoint of the fourth aggregation line, a foot is hung on the space axis, and the first aggregation line, the second aggregation line, the third aggregation line and the fourth aggregation line respectively comprise a first end and a second end; the antenna elements are alternately arranged on two sides of the first aggregation line relative to the space axis direction at equal intervals in sequence from the first end to the second end of the first aggregation line, and the shorter the length of the antenna element close to the second end of the first aggregation line, the antenna elements on the first aggregation line are parallel to each other and are positioned on the same plane; a plurality of antenna oscillators are also arranged on the second aggregation line, the third aggregation line and the fourth aggregation line respectively, and the arrangement mode of the antenna oscillators is the same as that of the antenna oscillators of the first aggregation line;
the first coaxial line and the second coaxial line are respectively arranged on the first aggregation line and the second aggregation line and comprise an inner conductor, an insulating medium layer and an outer conductor layer which are coaxially arranged, the insulating medium layer is arranged between the inner conductor and the outer conductor layer, and the outer conductor layer of the first coaxial line and the second coaxial line are respectively attached to one sides, far away from the space axis, of the first aggregation line and the second aggregation line;
the first set line with the second end of second set line still is provided with first through-hole and second through-hole respectively, the shape and the size of first through-hole and second through-hole respectively with first coaxial line and second coaxial line suit, the output of first coaxial line and second coaxial line is connected to respectively first through-hole and second through-hole, just the inner conductor of first coaxial line and second coaxial line passes respectively first through-hole with the second through-hole is connected to the third set line with the fourth set line.
2. The antenna according to claim 1, wherein each of the collective lines has a rectangular parallelepiped shape.
3. The antenna of claim 1, further comprising:
a third coaxial line disposed on the third collective line, symmetrical to the first coaxial line with respect to the spatial axis;
and the fourth coaxial line is arranged on the fourth collecting line and is symmetrical to the second coaxial line about the space axis.
4. The antenna according to claim 3, wherein the input impedance of the first antenna single-polarization structure composed of the first coaxial line, the third coaxial line and the antenna element, which are arranged on the first aggregation line and the third aggregation line, and the input impedance of the second antenna single-polarization structure composed of the second coaxial line, the fourth coaxial line and the antenna element, which are arranged on the second aggregation line and the fourth aggregation line, are both 50 ohms.
5. The antenna of claim 4, wherein the wires of the first coaxial line, the second coaxial line, the third coaxial line, and the fourth coaxial line are 50 ohm coaxial lines.
6. The antenna of claim 1, wherein the opening height of the first through hole is higher than the opening height of the second through hole.
7. The antenna of claim 1, further comprising:
a first reflection plate disposed at a first end of the antenna main body.
8. A dual-element antenna, comprising:
first and second antennas, said first and second antennas being the dual polarized log periodic antenna of any of claims 1 to 6;
the power divider comprises a first power divider and a second power divider, wherein the first power divider and the second power divider are one-to-two power dividers;
the first coaxial line of the first antenna and the input end of the second coaxial line of the first antenna are respectively connected to the first output ports of the first power divider and the second power divider, and the first coaxial line of the second antenna and the input end of the second coaxial line of the second antenna are respectively connected to the second output ports of the first power divider and the second power divider.
9. The antenna of claim 8, comprising:
and the first power divider and the second power divider are arranged on the second reflector, and the plane where the double-unit structure antenna is arranged is vertical to the plane where the second reflector is arranged.
10. An antenna array comprising a plurality of antennas of the dual-element structure as claimed in claim 8, uniformly or regularly arranged on the same third reflector, and the plurality of antennas of the dual-element structure are perpendicular to the plane of the third reflector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911119825.4A CN110690564A (en) | 2019-11-15 | 2019-11-15 | Dual-polarized log-periodic antenna, dual-unit structure antenna and antenna array |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911119825.4A CN110690564A (en) | 2019-11-15 | 2019-11-15 | Dual-polarized log-periodic antenna, dual-unit structure antenna and antenna array |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112103628A (en) * | 2020-08-30 | 2020-12-18 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Low-profile ultra-wideband log periodic antenna unit |
| CN113258303A (en) * | 2020-02-07 | 2021-08-13 | 深圳市威富通讯技术有限公司 | High-gain radio frequency front-end device |
| CN113258254A (en) * | 2020-02-07 | 2021-08-13 | 深圳市威富通讯技术有限公司 | Multichannel WIFI signal transceiver |
| CN113314830A (en) * | 2020-02-07 | 2021-08-27 | 深圳市威富通讯技术有限公司 | Multichannel wireless signal transceiver |
| CN113497332A (en) * | 2020-04-02 | 2021-10-12 | 深圳市威富通讯技术有限公司 | Multi-channel high-gain WIFI signal transceiving device |
| CN113517537A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Novel three-dimensional radio frequency front end device |
| CN113517539A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Three-dimensional high-gain radio frequency front-end device |
| CN113517538A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Three-dimensional radio frequency front-end device |
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| CN113258303A (en) * | 2020-02-07 | 2021-08-13 | 深圳市威富通讯技术有限公司 | High-gain radio frequency front-end device |
| CN113258254A (en) * | 2020-02-07 | 2021-08-13 | 深圳市威富通讯技术有限公司 | Multichannel WIFI signal transceiver |
| CN113555668A (en) * | 2020-04-01 | 2021-10-26 | 深圳市威富通讯技术有限公司 | Multichannel wireless signal transceiver |
| CN113555667A (en) * | 2020-04-01 | 2021-10-26 | 深圳市威富通讯技术有限公司 | Multichannel wireless signal transceiver |
| CN113555669A (en) * | 2020-04-01 | 2021-10-26 | 深圳市威富通讯技术有限公司 | Multichannel wireless signal transceiver |
| CN113497332A (en) * | 2020-04-02 | 2021-10-12 | 深圳市威富通讯技术有限公司 | Multi-channel high-gain WIFI signal transceiving device |
| CN113555671A (en) * | 2020-04-02 | 2021-10-26 | 深圳市威富通讯技术有限公司 | Novel WIFI signal send-receiver device of multichannel |
| CN113555672A (en) * | 2020-04-02 | 2021-10-26 | 深圳市威富通讯技术有限公司 | Multi-channel reverse-period WIFI signal transceiving device |
| CN113517537A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Novel three-dimensional radio frequency front end device |
| CN113517539A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Three-dimensional high-gain radio frequency front-end device |
| CN113517538A (en) * | 2020-04-10 | 2021-10-19 | 深圳市威富通讯技术有限公司 | Three-dimensional radio frequency front-end device |
| CN112103628A (en) * | 2020-08-30 | 2020-12-18 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Low-profile ultra-wideband log periodic antenna unit |
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