CN216750304U - Miniaturized high-performance dual-polarized log-periodic antenna - Google Patents
Miniaturized high-performance dual-polarized log-periodic antenna Download PDFInfo
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- CN216750304U CN216750304U CN202220041094.7U CN202220041094U CN216750304U CN 216750304 U CN216750304 U CN 216750304U CN 202220041094 U CN202220041094 U CN 202220041094U CN 216750304 U CN216750304 U CN 216750304U
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Abstract
The utility model discloses a miniaturized high-performance dual-polarized log-periodic antenna, which comprises two pairs of periodic units which are sequentially arranged along the horizontal direction, the two pairs of periodic units are arranged at intervals, the two pairs of periodic units are single-polarized log-periodic units, the polarization directions of the two pairs of periodic units are mutually vertical, each pair of periodic units comprises two radiation oscillators and a coaxial cable, one of the two radiation oscillators is connected with an outer conductor of the coaxial cable, the other of the two radiation oscillators is connected with an inner conductor of the coaxial cable, the problem that an assembly line is too close in the prior art can be well solved by separating the two pairs of periodic units at intervals, the unstable performance of the dual-polarized log-periodic antenna caused by the problems of the processing precision or the assembly precision of the assembly line is avoided, the antenna has better S parameter characteristic and good radiation characteristic at the working frequency band of 0.6GHz-6GHz, and has a simple structure, the assembly is convenient.
Description
Technical Field
The utility model relates to the technical field of antenna design, in particular to a miniaturized high-performance dual-polarized log-periodic antenna.
Background
In the conventional dual-polarized log-periodic antenna, two pairs of log-periodic units are arranged vertically to each other, and the two log-periodic units in the vertical direction do not interfere with each other, so that dual polarization is realized. However, most of the conventional log periodic units are made of metal tubes or metal sheets, for example, chinese patents CN211789542U, CN209526210U, CN109449599B, etc., which have problems of large size and serious mutual interference, and meanwhile, the two log periodic units of these dual-polarized log periodic antennas are placed perpendicularly and crosswise, and the distance between the assembly lines (oscillator support rods) of the log periodic units is very close, so that the requirements on the hardness and precision of the assembly lines are high, because the distance between the assembly lines can change the capacitance between the oscillators, S parameter changes can be directly caused, especially the higher the frequency is, the smaller the size of the top of the log periodic unit is, the more sensitive the S parameter is to the distance between the assembly lines, and the unstable performance of the antenna is very easily caused.
Therefore, it is desirable to provide a new dual-polarized log-periodic antenna to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dual-polarized log-periodic antenna with better S parameter characteristics.
In order to achieve the above object, the present invention provides a miniaturized high-performance dual-polarized log-periodic antenna, which includes a first log-periodic unit and a second log-periodic unit sequentially arranged along a horizontal direction, wherein the first log-periodic unit and the second log-periodic unit are arranged at a distance, the first log-periodic unit and the second log-periodic unit are both single-polarized log-periodic units, polarization directions of the first log-periodic unit and the second log-periodic unit are perpendicular to each other, the first log-periodic unit includes two first radiating elements and a first coaxial cable, one of the two first radiating elements is connected to an outer conductor of the first coaxial cable, the other of the two first radiating elements is connected to an inner conductor of the first coaxial cable, the second log-periodic unit includes two second radiating elements and a second coaxial cable, one of the two second radiating elements is connected to an outer conductor of the second coaxial cable, the other of the two second radiation oscillators is connected to the inner conductor of the second coaxial cable.
In some embodiments, the first radiation oscillator includes a first aggregation line and a plurality of first oscillator pieces connected to the first aggregation line, the first aggregation line extends along an up-down direction, the plurality of first oscillator pieces are arranged along the up-down direction, and the first oscillator pieces on different sides of the first aggregation line are arranged in a staggered manner; the second radiation oscillator includes that the second gathers the line and connects a plurality of second oscillator pieces on the second gathers the line, the second gathers the line and extends along upper and lower direction, a plurality of second oscillator pieces are arranged along upper and lower direction, are located the second oscillator pieces of the different sides of second gathering line set up in a staggered way, the second oscillator piece with first oscillator piece is perpendicular.
In some embodiments, the length of the first piece of vibrators is gradually increased from top to bottom on the first assembly line, and the length of the second piece of vibrators is gradually increased from top to bottom on the second assembly line.
In some embodiments, at least a part of the first oscillator piece is of a bent structure, and the at least a part of the first oscillator piece comprises a first rectangular arm connected to the first aggregation line and a second rectangular arm connected to one end, far away from the first aggregation line, of the first rectangular arm; at least part second oscillator piece is the structure of buckling, at least part second oscillator piece is including connecting the third rectangular arm of second set line and connecting the third rectangular arm is kept away from the fourth rectangular arm of the one end of second set line, the third rectangular arm with first rectangular arm is perpendicular, the fourth rectangular arm with the second rectangular arm is perpendicular.
In some embodiments, the second rectangular arm is perpendicular to the first rectangular arm, and the fourth rectangular arm is perpendicular to the third rectangular arm.
In some embodiments, two first dipole pieces corresponding to the two first radiation dipoles are parallel to each other and arranged opposite to each other on two opposite sides of the two first aggregation lines, and the extending directions of the second rectangular arms of the two first dipole pieces corresponding to the two first radiation dipoles are opposite; two second oscillator pieces corresponding to the two second radiation oscillators are arranged on two opposite sides of the second aggregation line in parallel and opposite to each other, and the extending directions of the fourth rectangular arms of the two second oscillator pieces corresponding to the two second radiation oscillators are opposite.
In some embodiments, the feed point of the first radiating element is located at an upper end of the first aggregation line, and the feed point of the second radiating element is located at an upper end of the second aggregation line.
In some embodiments, the first radiating element is a sheet metal, or aluminum, or copper; the second radiation oscillator is made of metal plates, or aluminum or copper.
In some embodiments, the first log periodic unit is spaced from the second log periodic unit by 0.8 wavelengths of an operating frequency.
In some embodiments, the first radiating oscillators are arranged obliquely, the inclination angle of the first radiating oscillators to a vertical plane is 2-8 degrees, and the distance between the upper ends of the two first radiating oscillators is smaller than that between the lower ends of the two first radiating oscillators; the second radiation oscillators are obliquely arranged, the inclination angle between each second radiation oscillator and the vertical surface is 2-8 degrees, and the distance between the upper ends of the two second radiation oscillators is smaller than that between the lower ends of the two second radiation oscillators.
Compared with the prior art, the two-pair periodic unit is sequentially arranged along the horizontal direction and is separated to be arranged at intervals, so that the problem that an assembly line is too close in the prior art can be well solved, the unstable performance of the dual-polarization log periodic antenna caused by the problems of assembly line processing precision or assembly precision and the like is avoided, and the dual-polarization log periodic antenna has better S parameter characteristics and good radiation characteristics in a working frequency range of 0.6GHz-6GHz, and is simple in structure and convenient to assemble. In addition, the longer oscillator piece is arranged into a bending structure, the total length of the oscillator piece can be reduced by 20% through bending, the volume of each log periodic unit is greatly reduced, and the miniaturization of the dual-polarized log periodic antenna is finally realized.
Drawings
Fig. 1 is a perspective structural view of a dual-polarized log periodic antenna according to an embodiment of the present invention.
Fig. 2 is a structural diagram of the dual-polarized log periodic antenna shown in fig. 1 with the radome removed.
Fig. 3 is another angle of the structure shown in fig. 2.
Fig. 4 is an exploded view of the structure shown in fig. 2.
Fig. 5 is a graph of the voltage standing wave ratio of the dual polarized log periodic antenna of fig. 1.
Fig. 6 is a graph of antenna isolation for the dual-polarized log periodic antenna of fig. 1.
Fig. 7 is a graph of the gain of the dual polarized log periodic antenna of fig. 1.
Fig. 8 is a graph of the horizontal plane half-power angle of the dual polarized log periodic antenna of fig. 1.
Fig. 9 is a vertical plane half-power angle plot of the dual-polarized log-periodic antenna of fig. 1.
Detailed Description
In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings. It is to be understood that the described embodiments are merely a subset of embodiments of the utility model and not all embodiments of the utility model, with the understanding that the utility model is not limited to the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the described embodiments without inventive effort, shall fall within the scope of protection of the utility model.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and thus are not to be construed as limiting the scope of the present invention.
The dual-polarized log periodic antenna of the present invention is described in detail below with reference to the accompanying drawings by taking specific embodiments as examples:
referring to fig. 1 to 4, an embodiment of the present invention provides a miniaturized high-performance dual-polarized log-periodic antenna 100, which includes a first log-periodic unit 1 and a second log-periodic unit 2 sequentially arranged along a horizontal direction, and an antenna cover 3 (as shown in fig. 1) covering the first log-periodic unit 1 and the second log-periodic unit 2, wherein the first log-periodic unit 1 and the second log-periodic unit 2 are arranged at a distance, and the first log-periodic unit 1 and the second log-periodic unit 2 are single-polarized log-periodic units and polarization directions are perpendicular to each other. The first logarithmic cycle unit 1 includes two first radiation oscillators 11 and a first coaxial cable 12, one of the two first radiation oscillators 11 is connected to the outer conductor of the first coaxial cable 12, and the other of the two first radiation oscillators 11 is connected to the inner conductor of the first coaxial cable 12, as shown in fig. 2 and 3. Similarly, the second log periodic unit 2 includes two second radiation oscillators 21 and a second coaxial cable 22, one of the two second radiation oscillators 21 is connected to the outer conductor of the second coaxial cable 22, and the other of the two second radiation oscillators 21 is connected to the inner conductor of the second coaxial cable 22, as shown in fig. 2 and 3.
The phrase "sequentially arranged along the horizontal direction" means that the first logarithmic period unit 1 and the second logarithmic period unit 2 are sequentially arranged along a straight line in the horizontal direction, and is different from the intersection arrangement of the first logarithmic period unit 1 and the second logarithmic period unit 2.
In some embodiments, when the two first radiating elements 11 are placed on the same plane, the two first radiating elements 11 are mirror images of each other. When the two second radiation elements 21 are placed on the same plane, the two second radiation elements 21 are mirror images of each other.
In some embodiments, the first log periodic unit 1 and the second log periodic unit 2 are spaced apart by 0.8 wavelength of the operating frequency, which is not limited to this specific implementation.
In some embodiments, the first radiating elements 11 are arranged obliquely (as shown in fig. 3), and the angle of inclination of the first radiating elements 11 to the vertical plane is 2-8 °, that is, the included angle between the upper ends of the two first radiating elements 11 is 4-16 °, and the distance between the upper ends of the two first radiating elements 11 is smaller than that between the lower ends of the two first radiating elements 11. Similarly, the second radiating oscillators 21 are obliquely arranged (as shown in fig. 2), and the inclination angle of the second radiating oscillators 21 to the vertical plane is 2-8 °, that is, the included angle between the upper ends of the two second radiating oscillators 21 is 4-16 °, and the distance between the upper ends of the two second radiating oscillators 21 is smaller than that between the lower ends thereof.
The first radiation oscillator 11 and the second radiation oscillator 21 are made of metal materials, and the first radiation oscillator 11 is made of metal plates, or aluminum or copper; similarly, the second radiation oscillator 21 is made of a metal plate, aluminum, or copper. Of course, the first and second radiation oscillators 11 and 21 are not limited to metal plates, aluminum, or copper.
Referring to fig. 2 to 4, in some embodiments, each first radiation element 11 includes a first aggregation line 111 and a plurality of first oscillator pieces 112 connected to the first aggregation line 111, the first aggregation line 111 extends along an up-down direction, the first oscillator pieces 112 located on different sides of the first aggregation line 111 are staggered (as shown in fig. 4), and the lengths of the first oscillator pieces 112 on the first aggregation line 111 from top to bottom gradually increase. Similarly, each second radiation oscillator 21 includes a second assembly line 211 and a plurality of second oscillator pieces 212 connected to the second assembly line 211, the second assembly line 211 extends along the up-down direction, the second oscillator pieces 212 located on different sides of the second assembly line 211 are staggered (as shown in fig. 4), and the lengths of the second oscillator pieces 212 gradually increase from the top to the bottom on the second assembly line 211. The second dipole plate 212 is perpendicular to the first dipole plate 112.
The specific layout of each oscillator piece 112, 212, the distance between the oscillator pieces 112, 212, the size, etc. are designed based on the dual-polarized logarithm method in the prior art, as long as the dual-polarized log-periodic antenna can be realized, and will not be described in detail herein.
Referring to fig. 2 to 4, in some embodiments, in addition to the shorter first vibrator pieces 112 near the upper end of the first aggregation line 111, the other first vibrator pieces 112 are bent structures, and the bent first vibrator pieces 112 include a first rectangular arm 1121 connected to the first aggregation line 111 and a second rectangular arm 1122 (as shown in fig. 4) connected to an end of the first rectangular arm 1121 away from the first aggregation line 111. Similarly, the other second dipole pieces 212 are bent structures except for a few shorter second dipole pieces 212 near the upper end of the second collective line 211, and the bent second dipole pieces 212 include a third rectangular arm 2121 connected to the second collective line 211 and a fourth rectangular arm 2122 connected to an end of the third rectangular arm 2121 remote from the second collective line 211. The third rectangular arm 2121 is perpendicular to the first rectangular arm 1121 and the fourth rectangular arm 2122 is perpendicular to the second rectangular arm 1122. By forming the first and second dipole pieces 112 and 212 having a long size into a bent structure, the size of the antenna 100 can be reduced.
In some embodiments, the second rectangular arm 1122 is perpendicular to the first rectangular arm 1121, i.e., the second rectangular arm 1122 is at an angle of 90 degrees to the first rectangular arm 1121; similarly, the fourth rectangular arm 2122 is perpendicular to the third rectangular arm 2121, i.e. the angle between the fourth rectangular arm 2122 and the third rectangular arm 2121 is 90 degrees. Of course, the second rectangular arm 1122 and the first rectangular arm 1121 are not limited to being vertically disposed, nor are the fourth rectangular arm 2122 and the third rectangular arm 2121 limited to being vertically disposed.
As shown in fig. 2 to 4, in some embodiments, two first dipole pieces 112 corresponding to two first radiation dipole pieces 11 are parallel to each other and oppositely disposed on two opposite sides of the two first aggregation lines 111, the extending directions of the second rectangular arms 1122 of the two first dipole pieces 112 corresponding to the two first radiation dipole pieces 11 are opposite, and taking the angle shown in fig. 4 as an example, in the two corresponding first dipole pieces 112, the second rectangular arm 1122 of one first dipole piece 112 extends leftward, and the second rectangular arm 1122 of the other first dipole piece 112 extends rightward. Similarly, the two second dipole pieces 212 corresponding to the two second dipole pieces 21 are disposed in parallel and opposite to each other on two opposite sides of the two second aggregation lines 211, the extending directions of the fourth rectangular arms 2122 of the two second dipole pieces 212 corresponding to the two second dipole pieces 21 are opposite, and taking the angle shown in fig. 4 as an example, in the two corresponding second dipole pieces 212, the fourth rectangular arm 2122 of one second dipole piece 212 extends forward, and the fourth rectangular arm 2122 of the other second dipole piece 212 extends backward.
The "two corresponding first oscillator pieces" are two first oscillator pieces 112 respectively located on two sides of the two first aggregation lines 111 and adjacent to each other in the horizontal direction; the "two corresponding second oscillator pieces" are two second oscillator pieces 212 located on two sides of the two second collective lines 211 respectively and adjacent to each other in the horizontal direction.
As shown in fig. 2 and 3, in some embodiments, the feeding point of the first radiating element 11 is located at the upper end of the first aggregation line 111, that is, the inner conductor of the first coaxial cable 12 is connected to the upper end of the first aggregation line 111. Similarly, the feeding point of the second radiation element 21 is located at the upper end of the second aggregation line 211, that is, the inner conductor of the second coaxial cable 22 is connected to the upper end of the second aggregation line 211. The lower ends of the first coaxial cable 12 and the second coaxial cable 22 are respectively connected to a radio frequency connector 4, so as to be connected to an external transceiver (not shown) through the radio frequency connector 4, thereby implementing signal transceiving of the antenna 100.
In summary, the two pairs of periodic units 1 and 2 are sequentially arranged along the horizontal direction and are separated from each other to form a space, so that the problem that the aggregation line 111 and the aggregation line 211 are too close in the prior art can be well solved, the unstable performance of the dual-polarized log periodic antenna 100 caused by the problems of the processing precision or the assembling precision of the aggregation lines 111 and 112 is avoided, and the dual-polarized log periodic antenna has good S parameter characteristics and good radiation characteristics in the working frequency range of 0.6GHz-6GHz, and is simple in structure and convenient to assemble. In addition, the utility model also sets the longer oscillator pieces 112 and 212 into the bending structure, the total length of the oscillator pieces can be reduced by 20% through bending, the volume of each pair of log periodic units 1 and 2 is greatly reduced, and the antenna 100 can be smaller even if the two pairs of periodic units 1 and 2 are arranged at intervals. Finally, the size of the whole antenna 100 is about 290 × 170 × 450mm, the operating frequency band is 0.6GHz-6GHz, the gain is 7-9dBi, the standing-wave ratio is below 1.6, the isolation is greater than 20dB, the antenna 100 has excellent performance, and graphs of voltage standing-wave ratio, isolation, gain, horizontal plane half-power angle and vertical plane half-power angle are shown in fig. 5 to fig. 9.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. A miniaturized high-performance dual-polarization log-periodic antenna is characterized by comprising a first log-periodic unit and a second log-periodic unit which are sequentially arranged along the horizontal direction, wherein the first log-periodic unit and the second log-periodic unit are arranged at intervals, the first log-periodic unit and the second log-periodic unit are single-polarization log-periodic units, the polarization directions of the first log-periodic unit and the second log-periodic unit are mutually vertical, the first log-periodic unit comprises two first radiation oscillators and a first coaxial cable, one of the two first radiation oscillators is connected with an outer conductor of the first coaxial cable, the other of the two first radiation oscillators is connected with an inner conductor of the first coaxial cable, the second log-periodic unit comprises two second radiation oscillators and a second coaxial cable, one of the two second radiation oscillators is connected with an outer conductor of the second coaxial cable, the other of the two second radiation oscillators is connected to the inner conductor of the second coaxial cable.
2. The antenna of claim 1, wherein the first radiating element comprises a first aggregation line and a plurality of first element pieces connected to the first aggregation line, the first aggregation line extends along an up-down direction, the plurality of first element pieces are arranged along the up-down direction, and the first element pieces on different sides of the first aggregation line are arranged in a staggered manner; the second radiation oscillator includes that the second gathers the line and connects a plurality of second oscillator pieces on the second gathers the line, the second gathers the line and extends along upper and lower direction, a plurality of second oscillator pieces are arranged along upper and lower direction, are located the second oscillator pieces of the different sides of second gathering line set up in a staggered way, the second oscillator piece with first oscillator piece is perpendicular.
3. The antenna of claim 2, wherein the length of a first patch of elements increases progressively from top to bottom on the first collective line and the length of a second patch of elements increases progressively from top to bottom on the second collective line.
4. The antenna of claim 2, wherein at least a portion of the first dipole piece is of a folded structure, and the at least a portion of the first dipole piece comprises a first rectangular arm connected to the first aggregation line and a second rectangular arm connected to an end of the first rectangular arm far away from the first aggregation line; at least part second oscillator piece is the structure of buckling, at least part second oscillator piece is including connecting the third rectangular arm of second set line and connecting the third rectangular arm is kept away from the fourth rectangular arm of the one end of second set line, the third rectangular arm with first rectangular arm is perpendicular, the fourth rectangular arm with the second rectangular arm is perpendicular.
5. The antenna of claim 4, wherein the second rectangular arm is perpendicular to the first rectangular arm, and the fourth rectangular arm is perpendicular to the third rectangular arm.
6. The antenna of claim 4, wherein two first dipole pieces corresponding to the two first radiating dipoles are parallel to each other and oppositely arranged on two opposite sides of the two first aggregation lines, and the extending directions of the second rectangular arms of the two first dipole pieces corresponding to the two first radiating dipoles are opposite; two second oscillator pieces corresponding to the two second radiation oscillators are arranged on two opposite sides of the second aggregation line in parallel and opposite to each other, and the extending directions of the fourth rectangular arms of the two second oscillator pieces corresponding to the two second radiation oscillators are opposite.
7. The antenna of claim 4, wherein the feed point of the first radiating element is located at an upper end of the first aggregate line, and the feed point of the second radiating element is located at an upper end of the second aggregate line.
8. The antenna of claim 1, wherein the first radiating element is sheet metal, or aluminum, or copper; the second radiation oscillator is made of metal plates, or aluminum or copper.
9. The antenna of any of claims 1 to 8, wherein the first log periodic element is spaced from the second log periodic element by 0.8 wavelengths of an operating frequency.
10. The antenna according to any one of claims 1 to 8, wherein the first radiating elements are arranged obliquely, the angle of inclination of the first radiating elements with a vertical plane is 2-8 degrees, and the distance between the upper ends of the two first radiating elements is smaller than that between the lower ends of the two first radiating elements; the second radiation oscillators are obliquely arranged, the inclination angle between each second radiation oscillator and the vertical surface is 2-8 degrees, and the distance between the upper ends of the two second radiation oscillators is smaller than that between the lower ends of the two second radiation oscillators.
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| CN202220041094.7U CN216750304U (en) | 2022-01-06 | 2022-01-06 | Miniaturized high-performance dual-polarized log-periodic antenna |
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| CN202220041094.7U CN216750304U (en) | 2022-01-06 | 2022-01-06 | Miniaturized high-performance dual-polarized log-periodic antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477200A (en) * | 2023-09-22 | 2024-01-30 | 人天通信集团有限公司 | Single polarization log periodic antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117477200A (en) * | 2023-09-22 | 2024-01-30 | 人天通信集团有限公司 | Single polarization log periodic antenna |
| CN117477200B (en) * | 2023-09-22 | 2024-04-05 | 人天通信集团有限公司 | Single polarization log periodic antenna |
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