CN112864571A - Near-space non-blind-area high-gain antenna and using method thereof - Google Patents
Near-space non-blind-area high-gain antenna and using method thereof Download PDFInfo
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- CN112864571A CN112864571A CN202011623601.XA CN202011623601A CN112864571A CN 112864571 A CN112864571 A CN 112864571A CN 202011623601 A CN202011623601 A CN 202011623601A CN 112864571 A CN112864571 A CN 112864571A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
Abstract
The invention provides a near-space blind-area-free high-gain antenna and a using method thereof, the log periodic antenna comprises a central mast, a first antenna oscillator and a second antenna oscillator, wherein an antenna base with the same central axis is arranged on the central mast, an antenna matcher is arranged at the central position of the antenna base, a plurality of obliquely upward supporting rods are uniformly distributed on the antenna base along the circumferential direction, the radial distance between each supporting rod and the central mast is gradually increased from bottom to top, the lower ends of the first antenna oscillator and the second antenna oscillator are respectively connected with the antenna matcher, the upper ends of the first antenna oscillator and the second antenna oscillator are symmetrical about the central axis and are arranged in a same-direction spiral upward manner along the inner sides of the plurality of supporting rods. The invention increases the circumferential size of the antenna to reduce the width of the antenna, greatly compresses the width of the antenna, reduces the erection difficulty of the antenna and meets the high-gain requirement of near-distance communication.
Description
Technical Field
The invention relates to the technical field of log periodic antennas, in particular to a near-space blind-area-free high-gain antenna and a using method thereof.
Background
The log periodic antenna belongs to one of non-frequency-variable antennas, has good broadband characteristics, is widely applied to broadband wireless transmission, and is the only broadband antenna which can work in the whole short wave band by utilizing one antenna and keep good electrical performance at present in the short wave band.
The log periodic dipole antenna is a basic form of log periodic antenna, and is formed by cross-connecting N parallel dipoles by two wires, wherein the wires are generally called as an aggregate line, and the parallel dipoles connected to the same aggregate line have different lengths and different distances and are parallel to each other. Therefore, the log periodic dipole antenna can also be regarded as a coplanar linear array formed by feeding parallel linear dipoles with unequal lengths and unequal intervals by using a torsional balance transmission line. Electromagnetic energy supplied by the signal source is transmitted along the integrated line to sequentially excite each vibrator. The parallel couplers may be in various forms, such as metal tubes, metal wires, or metal sheets.
The angle-tooth-shaped logarithmic period antenna is generally applied to high-power short-wave broadcasting stations and communication radio stations, and when the working frequency is 4-30 MHz and under the actual erection condition, the overall height, length and width of the antenna respectively reach 67.5m, 182.2m and 238.1 m. As shown in fig. 1, the overall three-dimensional size of the antenna is too large, which causes a lot of troubles in installation and erection of the antenna and site control.
In addition, in general, in order to implement short-range communication, a communication station often uses a short-range antenna such as a three-wire antenna or a three-wire inverted-V antenna to solve the problem of short-range communication, but due to the limitation of the antenna radiation mode, the efficiency and gain of such an antenna are low, while a log-periodic antenna with high gain is mostly used for long-range communication and radiates outwards through a low elevation angle, but a log-periodic antenna with high gain is difficult to meet the requirement of high gain at a short range due to strong directivity.
Disclosure of Invention
The invention provides a near-space non-blind area high-gain antenna and a using method thereof, which increase the circumferential size of the antenna to reduce the width of the antenna, greatly compress the width of the antenna, reduce the erection difficulty of the antenna and meet the high-gain requirement of near-distance communication.
The technical scheme of the invention is realized as follows: the utility model provides a nearly empty no blind area high gain antenna, including central mast, first antenna element and second antenna element, be provided with the antenna base with the central axis on the central mast, the central point department of putting of antenna base is provided with the antenna matcher, there are many ascending bracing pieces in the slant along the circumference equipartition on the antenna base, the radial interval from the bottom up crescent of bracing piece and central mast, the lower extreme of first antenna element and second antenna element links to each other with the antenna matcher respectively, the upper end of first antenna element and second antenna element is symmetrical with the central axis, and the inboard syntropy spiral along many bracing pieces upwards expandes the setting.
Furthermore, oscillator fixing parts are arranged at the joints of the first antenna oscillator and the second antenna oscillator with the supporting rod, and on the same supporting rod, the distance between the adjacent oscillator fixing parts is increased in an equal ratio series from bottom to top along the supporting rod; on the same supporting rod, the oscillator fixing pieces of the first antenna oscillator and the oscillator fixing pieces of the second antenna oscillator are arranged in a staggered mode; the vibrator fixing parts on the supporting rods which are symmetrical by the central axis have the same position.
Furthermore, the antenna base is uniformly provided with fixed lugs which are in one-to-one correspondence with the support rods along the circumferential direction, the lower ends of the support rods are hinged to the fixed lugs, and the upper ends of the support rods are far away from the central mast and are unfolded towards the outside.
Furthermore, the upper end and the middle position of the support rod are connected with the central mast through inner pull wires, one end of each inner pull wire is connected with the support rod, and the other end of each inner pull wire is connected with the central mast in an inclined upward manner.
Furthermore, the upper end of the supporting rod is connected with one end of an outer stay wire, and the other end of the outer stay wire is fixedly connected with the ground through a stay wire ground nail.
Furthermore, the number of the supporting rods is 6, any one supporting rod is taken as a first supporting rod, the first supporting rod, a second supporting rod, a third supporting rod, a fourth supporting rod, a fifth supporting rod and a sixth supporting rod are sequentially arranged in an anticlockwise order, the first antenna oscillator spirally and upwards expands along the anticlockwise direction on the inner sides of the 6 supporting rods from the lower end of the first supporting rod, and the second antenna oscillator spirally and upwards expands along the anticlockwise direction on the inner sides of the 6 supporting rods from the lower end of the fourth supporting rod.
A use method of a near-empty non-blind area high-gain antenna comprises the following steps: the antenna is characterized in that one end of the antenna, which faces the ground, is an antenna transmitting end, after the antenna is electrified, the antenna transmitting end transmits beams to the ground, and then the beams are reflected to a sky ionized layer once through the ground and are reflected to the ground again through the sky ionized layer.
The invention has the beneficial effects that:
the traditional zigzag oscillator of the antenna is changed into a half spiral line, the original triangular plane structure of the antenna is changed into a conical structure under the condition of keeping the length of the original oscillator unchanged, the antenna adopts an inverted conical spiral direction, and the circumferential dimension of the antenna is increased to reduce the width of the antenna. Compared with the traditional angle tooth-shaped log periodic antenna, the antenna has the advantages that the width of the antenna is greatly reduced on the premise of obtaining equal-length antenna elements, the erection difficulty of the antenna is reduced, and the occupied area is reduced.
The antenna is a high-elevation antenna and used for near field communication, the transmitting direction of the antenna is changed into radiation to the ground, then the radiation is reflected to the sky through the ground, and the radiation is reflected to the ground from the sky, so that the high-gain requirement of the near field communication is met, and meanwhile, compared with the antenna mode of directly radiating to the sky, the antenna is lower in erection difficulty.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a conventional angular-tooth-shaped log periodic antenna;
FIG. 2 is a schematic diagram of an antenna according to the present invention;
FIG. 3 is a top view of the antenna of the present invention;
FIG. 4 is a top view of the antenna base;
FIG. 5 is a front view of the antenna base;
FIG. 6 is a diagram illustrating the communication effect of the antenna of the present invention;
FIG. 7 is a top view of the initial helix of the antenna of the present invention;
fig. 8 is a schematic diagram of the arrangement structure of the vibrator fixing member on the support bar.
The antenna comprises a central mast 1, a first antenna oscillator 2, a second antenna oscillator 3, an antenna base 4, a support rod 5, an antenna matcher 6, a base cross brace 7, a fixed support lug 8, a central axis 9, an inner stay wire 10, an outer stay wire 11, a first support rod 12, a second support rod 13, a third support rod 14, a fourth support rod 15, a fifth support rod 16, a sixth support rod 17, an antenna transmitting end 18, a ground 19, a sky ionosphere 20 and an oscillator fixing piece 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The "up and down" of the present invention is relative to the positional relationship shown in fig. 2.
Example one
As shown in fig. 2 and 3, a near-air blind-area-free high-gain antenna, including a central mast 1, a first antenna element 2 and a second antenna element 3, an antenna base 4 with a central axis 9 is provided on the central mast 1, an antenna matcher 6 is provided at the central position of the antenna base 4, a plurality of obliquely upward supporting rods 5 are uniformly distributed on the antenna base 4 along the circumferential direction, the plurality of supporting rods 5 use the central axis 9 as the center, and are in a conical layout, the radial distance between the supporting rods 5 and the central axis 9 is gradually increased from bottom to top, the lower ends of the first antenna element 2 and the second antenna element 3 are respectively connected with the antenna matcher 6, the upper ends of the first antenna element 2 and the second antenna element 3 are symmetrical with the central axis 9, and are arranged upwards along the inner side equidirectional spiral of the plurality of.
As shown in fig. 4 and 5, the antenna matcher 6 is installed at the center of the antenna base 4, the antenna matcher 6 includes two binding posts and a feeder interface, and the antenna matcher 6 is fixed on the antenna base 4 through two matcher cross arms.
The central mast 1 is a triangular support tower, the antenna base 4 is formed by connecting three base cross braces 7 by taking the central mast 1 as a center tail, the base cross braces 7 are of an L-shaped structure, the base cross braces 7 comprise base fixing plates and base mounting plates vertical to the base fixing plates, and the base fixing plates are fixedly connected with cross rods of the central mast 1 through U-shaped screws. Base mounting panel level sets up, and 3 base mounting panels use central mast 1 as the center, and along the circumference equipartition fixed by fixed journal stirrup 8, fixed journal stirrup 8 and 5 one-to-one of bracing piece, bracing piece 5 has 6, then fixed journal stirrup 8 also is 6, and the contained angle between the adjacent fixed journal stirrup 8 is 60 degrees. The lower extreme of bracing piece 5 is articulated with the fixed journal stirrup 8 that corresponds, and the contained angle of bracing piece 5 and central axis 9 is 45 degrees, and the contained angle number of degrees of bracing piece 5 and central axis 9 can be adjusted as required, specifically depends on the length of the antenna element that the frequency range of antenna corresponds, and central mast 1 is kept away from to the upper end of bracing piece 5, and expands to the outside.
As shown in fig. 2, the upper end and the middle position of the support rod 5 are connected with the central mast 1 through an inner pull wire 10, one end of the inner pull wire 10 is connected with the support rod 5, and the other end is obliquely and upwardly fixedly connected with the central mast 1. In order to improve the structural stability of the antenna, the upper end of the support rod 5 is connected with one end of the outer stay wire 11, and the other end of the outer stay wire 11 is fixedly connected with the ground 19 through a stay wire ground nail.
As shown in fig. 3, 7 and 8, each support rod 5 is provided with a vibrator fixing member 21 through which a vibrator line is threaded, and the positions where the vibrator fixing members 21 are installed on the support rods 5 symmetrical about the central axis 9 are the same. On same bracing piece 5, the interval from the bottom up of adjacent oscillator mounting increases gradually, upwards extends along bracing piece 5 axial at the oscillator mounting of same bracing piece 5, until reachingUntil the upper end of the support rod 5 can not be fixed. Setting the distribution coefficient of the spacing between adjacent vibrator fixing parts as k, and expanding n grids and n grids every time the spacing is outward>0 and is an integer, the distance between the adjacent vibrator fixing parts 21 increases along the support rod 5 from top to bottom according to an equal ratio sequence, for example, the initial distance between the adjacent vibrator fixing parts is d1The distance between the adjacent vibrator fixing members 21 on the support rod 5 is d from bottom to bottom1、d1×k、d1×k2…，d1×knThe ratio K is at least greater than 1, and is calculated and set according to the antenna performance requirement.
The oscillator mounting of the first antenna oscillator 2 of same root bracing piece 5 and the oscillator mounting of second antenna oscillator 3 are staggered, and first antenna oscillator 2 and second antenna oscillator 3 are followed initial fixed point and are passed the oscillator mounting that corresponds of each bracing piece 5 in proper order, and anticlockwise spiral upwards extends.
Any one of the supporting rods 5 is used as a first supporting rod 12, then the first supporting rod 12, a second supporting rod 13, a third supporting rod 14, a fourth supporting rod 15, a fifth supporting rod 16 and a sixth supporting rod 17 are sequentially arranged in an anticlockwise order, the lower end of the first antenna oscillator 2 is fixed on a binding post of the antenna matcher 6, and then oscillator fixing pieces which are in one-to-one correspondence with the first antenna oscillators 2 sequentially penetrate through the first supporting rod 12, the second supporting rod 13, the third supporting rod 14, the fourth supporting rod 15, the fifth supporting rod 16, the sixth supporting rod 17 and the first supporting rod 12 in an anticlockwise spiral direction in a spiral mode until the last oscillator fixing piece is fixed to the upper end of the supporting rod 5. Similarly, the lower end of the second antenna element 3 is fixed on the other binding post of the matcher, and sequentially and anticlockwise spirally penetrates through the element fixing parts corresponding to the second antenna elements 3 one by one from the fourth supporting rod 15 until the last element fixing part is fixed at the upper end of the supporting rod 5. As shown in fig. 7, if the first starting point of the vibrator fixing member 21 on the first support bar 12 is a, the first starting point on the second support bar 13 is b, and the first starting point on the third support bar 14 is c, the layout of the vibrator fixing member 21 on the fourth support bar 15 is the same as that of the first support bar 12, the layout of the vibrator fixing member 21 on the fifth support bar 16 is the same as that of the fifth support bar 16, and the layout of the vibrator fixing member 21 on the sixth support bar 17 is the same as that of the third support bar 14.
The distances from the oscillator fixing pieces to the lower ends of the supporting rods 5 are sequentially increased between the first supporting rod 12 and the second supporting rod 13, between the second supporting rod 13 and the third supporting rod 14, between the third supporting rod 14 and the fourth supporting rod 15, between the fourth supporting rod 15 and the fifth supporting rod 16, and between the fifth supporting rod 16 and the sixth supporting rod 17, so that the first antenna oscillator 2 and the second antenna oscillator 3 are spirally expanded upwards by taking the central axis 9 as an axis, the first antenna oscillator 2 and the second antenna oscillator 3 are installed at equal proportional positions through the oscillator fixing pieces on the supporting rods 5, namely the oscillator fixing pieces of the first antenna oscillator 2 and the second antenna oscillator 3 are symmetrically arranged by the central axis 9, the parts of the first antenna oscillator 2 and the second antenna oscillator 3 which are respectively positioned at the inner sides of 6 supporting rods 5 form multiple pairs of symmetric oscillators, and each pair of symmetric oscillators is opposite to the symmetric oscillators of the angular tooth-shaped periodic antenna, because the antenna element in this embodiment adopts the ascending back taper of spiral mode of expansion, for traditional angle tooth shape log-periodic antenna, under the prerequisite of obtaining isometric antenna element, very big compression the width of antenna, make the erectting degree of difficulty of antenna reduce, take up an area of and reduce.
By adopting the structure, the whole size of the antenna is compressed in the circumference with the diameter of 16m and the center mast, and the erection difficulty is reduced.
Example two
The near-space non-blind area high-gain antenna in the first embodiment is used for near-field communication, and the specific use method is as follows: as shown in fig. 6, an antenna emitting end 18 (i.e. the lower ends of the first antenna element 2 and the second antenna element 3) is disposed at one end of the antenna facing the ground 19, and after the antenna is powered on, the antenna emitting end 18 emits a beam to the ground 19, and then the beam is reflected to the sky ionosphere 20 once through the ground 19 and then reflected to the ground 19 twice through the sky ionosphere 20.
Due to the high gain of the log periodic antenna, the beam width emitted by the antenna is small, so that the beam width reflected by the ground 19 is also small, and after the beam is reflected back to the ground 19 again by the sky ionosphere 20, the communication coverage of the antenna meets the requirement of short-distance omnidirectional, and the effect of high gain can be realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a nearly empty no blind area high gain antenna which characterized in that: including central mast (1), first antenna element (2) and second antenna element (3), be provided with antenna base (4) with central axis (9) on central mast (1), the central point department of putting of antenna base (4) is provided with antenna matcher (6), there are many ascending bracing pieces in the slant (5) along circumference equipartition on antenna base (4), the radial interval from the bottom up of bracing piece (5) and central mast (1) is crescent, the lower extreme of first antenna element (2) and second antenna element (3) links to each other with antenna matcher (6) respectively, the upper end of first antenna element (2) and second antenna element (3) is with central axis (9) symmetry, and the inboard syntropy spiral along many bracing pieces (5) upwards expands the setting.
2. The near-space non-blind area high-gain antenna of claim 1, wherein: the connection parts of the first antenna oscillator (2) and the second antenna oscillator (3) and the support rod (5) are provided with oscillator fixing parts, and on the same support rod (5), the distance between the adjacent oscillator fixing parts (21) is increased in an equal ratio series from bottom to top along the support rod (5); on the same supporting rod (5), the oscillator fixing pieces of the first antenna oscillator (2) and the oscillator fixing pieces of the second antenna oscillator (3) are arranged in a staggered mode; the vibrator fixing parts (21) on the support rods (5) which are symmetrical by the central axis (9) have the same position.
3. The near-space non-blind area high-gain antenna of claim 1, wherein: the antenna base (4) is uniformly provided with fixed lugs (8) which correspond to the support rods (5) one to one along the circumferential direction, the lower ends of the support rods (5) are hinged to the fixed lugs (8), and the upper ends of the support rods (5) are far away from the central mast (1) and are unfolded towards the outer side.
4. The near-space non-blind area high-gain antenna of claim 3, wherein: the upper end and the middle position of the support rod (5) are connected with the central mast (1) through an inner stay wire (10), one end of the inner stay wire (10) is connected with the support rod (5), and the other end of the inner stay wire is obliquely upwards connected with the central mast (1).
5. The near-space non-blind area high-gain antenna of claim 4, wherein: the upper end of the supporting rod (5) is connected with one end of an outer stay wire (11), and the other end of the outer stay wire (11) is fixedly connected with the ground (19) through a stay wire ground nail.
6. The near-space non-blind area high-gain antenna of claim 1, wherein: the quantity of bracing piece (5) is 6, use arbitrary bracing piece (5) as first bracing piece (12), be first bracing piece (12) according to anticlockwise order in proper order, second bracing piece (13), third bracing piece (14), fourth bracing piece (15), fifth bracing piece (16) and sixth bracing piece (17), first antenna element (2) begin from the lower extreme of first bracing piece (12), the inboard anticlockwise spiral of following 6 bracing pieces upwards expandes, second antenna element (3) begin from the lower extreme of fourth bracing piece (15), the inboard anticlockwise spiral of following 6 bracing pieces upwards expandes.
7. Use of a near-empty blind-zone-free high-gain antenna according to any of claims 1 to 6, characterized in that it comprises the following steps: one end of the antenna, which faces the ground (19), is an antenna transmitting end (18), after the antenna is electrified, the antenna transmitting end (18) transmits a beam to the ground (19), and then the beam is reflected to a sky ionized layer (20) through the ground (19) for the first time and then reflected to the ground (19) through the sky ionized layer (20) for the second time.
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| CN202011623601.XA CN112864571A (en) | 2020-12-31 | 2020-12-31 | Near-space non-blind-area high-gain antenna and using method thereof |
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| CN202011623601.XA CN112864571A (en) | 2020-12-31 | 2020-12-31 | Near-space non-blind-area high-gain antenna and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116190974A (en) * | 2022-12-27 | 2023-05-30 | 中国电子科技集团公司第五十四研究所 | Short wave logarithmic period antenna |
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| US3376577A (en) * | 1965-11-15 | 1968-04-02 | Granger Associates | Vertical radiation spiral antenna |
| GB1487424A (en) * | 1974-02-19 | 1977-09-28 | Marconi Co Ltd | Omni-directional antennae |
| US4498084A (en) * | 1982-12-30 | 1985-02-05 | Granger Associates | Four wire dual mode spiral antenna |
| CN102280690A (en) * | 2011-05-17 | 2011-12-14 | 北京中天鸿大科技有限公司 | Short-wave all-frequency band monopole antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116190974A (en) * | 2022-12-27 | 2023-05-30 | 中国电子科技集团公司第五十四研究所 | Short wave logarithmic period antenna |
| CN116190974B (en) * | 2022-12-27 | 2024-02-23 | 中国电子科技集团公司第五十四研究所 | Short wave logarithmic period antenna |
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