CN216214133U

CN216214133U - Log-periodic antenna

Info

Publication number: CN216214133U
Application number: CN202121366758.9U
Authority: CN
Inventors: 郑春暖; 林世雄
Original assignee: Shenzhen Weilai Rf Technology Co ltd
Current assignee: Shenzhen Weilai Rf Technology Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-04-05
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses a log periodic antenna which comprises a supporting column and a supporting truss, wherein the supporting column extends in the vertical direction, the supporting truss comprises a plurality of truss parts, the truss parts are arranged along the circumferential direction of the supporting column, and the truss parts are symmetrically distributed relative to the supporting column. The log periodic antenna has the advantages of reasonable structural layout, firmness, reliability, stable center of gravity, high safety performance, good directivity and small size.

Description

Log-periodic antenna

Technical Field

The utility model relates to the field of antennas, in particular to a log periodic antenna.

Background

The log periodic antenna is a broadband antenna with simple structure and excellent performance, has the advantages of wide frequency band, high gain, good directivity and the like, is widely applied to the fields of communication, side direction, search, electronic countermeasure and the like of wave bands such as short wave, ultrashort wave, microwave and the like, has various forms, and is the most widely applied log periodic element antenna at present.

The traditional oscillator type log periodic antenna also has the problems of one large end and one small end, and because the structural layout is unreasonable, the gravity center of the structure is unstable or deviates to one end seriously, so that potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a log periodic antenna, and aims to solve the technical problem that the structural gravity center of the conventional log periodic antenna is unstable or deviates to one side.

In order to achieve the above object, the log periodic antenna provided by the present invention comprises:

a support column extending in the up-down direction; and

the support truss comprises a plurality of truss parts, the truss parts are arranged along the circumferential direction of the support column, and the truss parts are symmetrically distributed relative to the support column.

Optionally, a plurality of the truss sections are located in the same horizontal plane.

Optionally, an included angle between two adjacent truss portions is greater than or equal to 80 degrees and less than or equal to 110 degrees.

Optionally, the number of the truss parts is four, and an included angle between two adjacent truss parts is 90 degrees.

Optionally, the plurality of truss portions include two first truss portions arranged oppositely and two second truss portions arranged oppositely, the two first truss portions are integrally formed, and the two second truss portions are arranged separately.

Alternatively, the first truss section may be composed of an insulated or non-insulated pipe, and the second truss section may be composed of an insulated pipe.

Optionally, the support column includes stand and lower stand, go up the stand with the coaxial setting of stand down, the bottom of going up the stand is provided with first mounting panel, the top of stand is provided with the second mounting panel down, first mounting panel with interval formation installation clearance between the second mounting panel, it is a plurality of to supply truss portion installation.

Optionally, a plurality of reinforcing ribs are arranged on the upper upright column, and the plurality of reinforcing ribs are arranged at intervals along the circumferential direction of the upper upright column;

and/or the lower upright post is provided with a plurality of reinforcing ribs which are arranged at intervals along the circumferential direction of the lower upright post.

Optionally, an installation part is arranged on the supporting column, and one end, close to the supporting column, of the truss part is connected with the installation part.

Optionally, the log periodic antenna further includes a turntable disposed at the bottom of the support column, and the turntable is rotatably connected to the support column and is configured to drive the support column to rotate.

The log periodic antenna comprises a support column and a support truss, wherein the support column extends along the up-down direction, the support truss comprises a plurality of truss parts, the truss parts are arranged along the circumferential direction of the support column, and the truss parts are symmetrically distributed relative to the support column. Therefore, the support trusses of the log periodic antenna are completely and symmetrically distributed relative to the support column, so that the center of gravity of the log periodic antenna is located in the axis direction of the support column, the mass distribution of the log periodic antenna is uniform and is not easily influenced by external or internal stress, the structure is damaged, and the stability and the safety of the log periodic antenna are improved.

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 structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a log periodic antenna according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of a log periodic antenna according to the utility model;

FIG. 3 is a right side view of an embodiment of a log periodic antenna of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a rear view of an embodiment of a log periodic antenna of the present invention;

FIG. 6 is a top view of an embodiment of a log periodic antenna of the present invention;

FIG. 7 is a schematic diagram of the connection between the support posts and the support truss in an embodiment of the log periodic antenna of the present invention;

FIG. 8 is a schematic diagram of the connection of a support post and a support truss in an embodiment of a log periodic antenna according to the utility model;

FIG. 9 is an enlarged view of a portion of FIG. 8 at B;

FIG. 10 is a schematic structural view of the second truss section of FIG. 2;

FIG. 11 is a schematic structural view of the first truss section of FIG. 2;

FIG. 12 is a schematic view of the insulated solenoid structure of FIG. 1;

FIG. 13 is a schematic view of the upper column of FIG. 2;

FIG. 14 is a schematic view of the structure of the lower column of FIG. 2;

the reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a log periodic antenna.

In the embodiment of the present invention, as shown in fig. 1, the log periodic antenna 100 includes a supporting column 3 and a supporting truss 4, where the supporting column 3 extends in an up-down direction; the support truss 4 includes a plurality of truss portions 41, the truss portions 41 are arranged along the circumferential direction of the support column 3, and the truss portions 41 are symmetrically distributed with respect to the support column 3.

The log periodic antenna 100 can be additionally provided with the iron tower 1 according to different site limitations and use requirements, and the iron tower 1 plays a role in fixing and supporting the log periodic antenna 100, so that the log periodic antenna 100 can obtain a better transmission angle, and the influence of environmental factors on the log periodic antenna 100 is reduced. It can be understood that iron tower 1 can be the design of integral type, or the sectional type sets up, and the integral type design can make iron tower 1's structure obtains fine guarantee in intensity, and the sectional type design then can increase according to different places and operation requirement iron tower 1's sectional quantity satisfies the customer to periodic antenna 100's high demand, makes the adaptation variety of product, reduces the manufacturing cost that repeated design brought and increases to and the difference that manufacturing procedure brought, the time cost of bringing.

Certainly, according to the requirement, the sectional type iron tower 1 can be designed to be capable of lifting, namely, the iron tower 1 is segmented according to a certain height, each segment is internally connected, each segment is connected in a sliding way, then a lifting device is installed, so that the sectional type iron tower 1 can be freely lifted in the height direction, the sectional type lifting design of the iron tower 1 can greatly simplify the installation and transportation processes of the iron tower 1,

optionally, the bottom of the iron tower 1 may be fixed by using reinforced concrete, or the iron tower 1 is fixed by using a fixing rod, or the iron tower 1 is fixed by using a pull rope, and the cross section of the iron tower 1 may be square, rectangular, or special-shaped according to the requirement, which is not limited herein.

In the embodiment of the present invention, the log periodic antenna 100 may include a rotation mechanism, and the rotation mechanism may further include a horizontal plane rotation mechanism and a pitching rotation mechanism, so that the log periodic antenna 100 rotates in a horizontal plane and rotates between different pitching angles, thereby implementing flexible adjustment for different transmitting and receiving directions, and improving flexibility and receiving accuracy of the log periodic antenna 100. Of course, different log periodic antennas 100 may be disposed according to different requirements, and are not limited herein.

As shown in fig. 2, the log periodic antenna 100 includes a supporting pillar 3, the supporting pillar 3 extends up and down along the height direction of the log periodic antenna 100, the bottom of the supporting pillar 3 may be fixedly connected to the iron tower 1, or rotatably connected to the rotating mechanism, and when the supporting pillar 3 is fixedly connected to the iron tower 1, the rotating mechanism may be disposed at the bottom of the iron tower 1, so as to adjust the receiving and transmitting angles of the log periodic antenna 100. Of course, the supporting column 3 can also be directly connected with the rotating mechanism, so that the rotating mechanism is convenient to arrange and install, and the size of the rotating mechanism can be reduced.

Support column 3 can the integral type setting, also can be the sectional type setting, and the integral type setting can reduce log periodic antenna 100's installation time and installation degree of difficulty, and split type design then can reduce the transportation degree of difficulty and the maintenance degree of difficulty, and the user can set up according to self demand, does not do the special restriction here. The outer contour shape of the supporting column 3 has various options, and the supporting column 3 may be a cylinder, a rectangle, a polygon, or the like, and is not limited herein, and the outer contour shape of the supporting column 3 is illustrated as a circle in this embodiment.

Optionally, in order to further improve the safety of the log periodic antenna 100, the log periodic antenna 100 may further include a plurality of lightning protection measures, specifically, a lightning rod is vertically disposed at the top end of the supporting column 3, and the bottom line is connected to the ground through the supporting column 3 and the iron tower 1, so that the safety of use is greatly improved.

As shown in fig. 2, the log periodic antenna 100 further includes a support truss 4, the support truss 4 is used for unfolding the log periodic antenna 100, the support truss 4 includes a plurality of truss portions 41, the number of truss portions 41 is set according to the size of the log periodic antenna 100, the truss portions 41 are arranged along the circumferential direction of the support column 3, and the truss portions 41 are symmetrically distributed with respect to the support column 3.

In the embodiment of the present invention, as shown in fig. 10 and 11, each of the truss portions 41 is composed of at least one pipe, each of the truss portions 41 may be a square pipe or a rectangular pipe, and the number of the pipes included in the truss portions 41 may be 1, 2, 3, 4, 5, 6, and the like, and the truss portions 41 may be arranged according to the specification of the pipes and the size of the log periodic antenna 100, and the truss portions 41 may be arranged relatively according to the number of the pipes.

The log periodic antenna 100 of the present invention includes a support column 3 and a support truss 4, wherein the support column 3 extends in an up-down direction, the support truss 4 includes a plurality of truss portions 41, the plurality of truss portions 41 are arranged along a circumferential direction of the support column 3, and the plurality of truss portions 41 are symmetrically distributed with respect to the support column 3. In this way, the support trusses 4 of the log periodic antenna 100 are completely symmetrically distributed with respect to the support column 3, so that the center of gravity of the log periodic antenna 100 is located in the axial direction of the support column 3, and the mass distribution of the log periodic antenna 100 is uniform and is not easily affected by external or internal stress, so that the structure is damaged, thereby improving the stability and the safety of the log periodic antenna 100.

In one embodiment, as shown in fig. 7 to 9, the plurality of truss portions 41 are located in the same horizontal plane, so that the antenna surfaces 6 of the log periodic antenna 100 can be arranged coplanar by arranging the truss portions 41 in the same horizontal plane, thereby enhancing the performance of the log periodic antenna 100. Moreover, the truss portions 41 are disposed in the same horizontal plane, which is advantageous for the center of gravity of the log periodic antenna 100, and improves the safety of the log periodic antenna 100.

Optionally, an included angle between two adjacent truss portions 41 is greater than or equal to 80 degrees and less than or equal to 110 degrees. It is understood that the log-periodic antenna 100 has a plurality of the truss sections 41 on a horizontal plane of the truss sections 41, and the plurality of the truss sections 41 are on the same horizontal plane, and if the included angle between the truss sections 41 is increased, the more the truss sections 41 are, so that the heavier the volume and weight of the log-periodic antenna 100 is, the more difficult the log-periodic transportation and installation is. Moreover, the larger the angle between the truss portions 41 is, the center of gravity of the truss portions 41 is shifted, so that the overall structure of the log periodic antenna 100 is biased to one side, resulting in poor stability of the log periodic antenna 100.

The number of the truss parts 41 is four, and an included angle between two adjacent truss parts 41 is 90 degrees. The support truss 4 includes four truss portions 41, four trusses are followed the circumference of support column 3 is on same horizontal plane symmetric distribution, just the contained angle of two adjacent truss portions 41 between the truss portion 41 is 90 degrees, two liang of mutually perpendicular between the truss portion 41 to on same horizontal plane.

In some embodiments, as shown in fig. 2 to 3, the plurality of truss portions 41 includes two first truss portions 4111 disposed opposite to each other, and two second truss portions 4121 disposed opposite to each other, where the two first truss portions 4111 are integrally formed, and the two second truss portions 4121 are separated from each other. It is possible to ensure that the truss portions 41 are coplanar, and since the first truss portions 4111 are continuously arranged, the overall structure of the first truss portions 4111 is more compact, and the structural strength of the first truss portions 4111 can be increased.

Specifically, the first truss portion 4111 may be composed of an insulated or non-insulated pipe. The first truss portion 4111 is substantially perpendicular to a transmission direction or a transmission angle of the log periodic antenna 100, so that the first truss portion 4111 has a small influence on a waveband of the log periodic antenna 100. Wherein, the non-insulating or insulating material can be a carbon fiber pipe, a glass fiber pipe, a stainless steel pipe, and the like. When the first truss portion 4111 is composed of a carbon fiber tube, it can be understood that the first truss portion 4111 is composed of a carbon fiber tube rather than a steel tube, and at first, since the carbon fiber has a light weight, the overall weight of the log periodic antenna 100 can be reduced, which facilitates transportation and installation, and meanwhile, the carbon fiber tube has a high strength, a tensile strength several times as high as that of a common steel material, and an elastic modulus of the carbon fiber tube is rather than that of a steel material, which provides excellent deformation resistance and shock resistance. Good durability and corrosion resistance, resistance to corrosion by acid, alkali, salt and atmospheric environment, and can ensure that the log periodic antenna 100 maintains good performance in different harsh environments.

The second truss portion 4121 may be composed of an insulating tube. The second truss portion 4121 is substantially parallel to the transmission direction or the transmission angle of the log periodic antenna 100, so that the second truss portion 4121 has a large influence on the band of the log periodic antenna 100. The insulating material can be glass fiber tubes, PVC tubes and the like. When the second truss portion 4121 is formed of a glass fiber tube, it can be understood that the overall weight of the log periodic antenna 100 can be reduced due to the characteristics of high strength and light weight, and the glass fiber tube has good insulation due to the characteristics of the glass fiber, so that the second truss portion 4121 is parallel to the transmitting and receiving directions of the log periodic antenna 100 but does not affect the performance thereof.

As shown in fig. 13 and 14, the supporting column 3 may be integrally disposed or disposed in a segmented manner, when the supporting column 3 is disposed in a segmented manner, the supporting column 3 includes an upper column 31 and a lower column 32, and the upper column 31 and the lower column 32 may be disposed in the same segment, or may be disposed in different segments according to different requirements. And the upper upright column 31 and the lower upright column 32 are coaxially arranged, and the coaxial arrangement can enable the gravity center of the support column 3 to be positioned on an axial line, so that the stability of logarithmic period is improved. The bottom of going up stand 31 is provided with first mounting panel 311, the top of lower stand 32 is provided with second mounting panel 321, first mounting panel 311 with the interval forms installation clearance between the second mounting panel 321, so that it is a plurality of truss portion 41 installs. It can be understood that the supporting pillar 3 is divided into the upper pillar 31 and the lower pillar 32, so that the supporting pillar 3 and the antenna element 61 can be avoided from being coplanar, the influence of the enclosure on the electromagnetic wave is reduced, and the performance of the log periodic antenna 100 is affected.

As shown in fig. 7 to 9, the upper column 31 and the lower column 32 are spaced apart from each other to mount the plurality of truss portions 41, a first mounting plate 311 is disposed at the bottom of the upper column 31, a second mounting plate 321 is disposed at the top of the lower column 32, the first mounting plate 311 and the second mounting plate 321 are disposed opposite to each other, the first mounting plate 311 and the second mounting plate 321 respectively abut against the upper and lower sides of the plurality of truss portions 41, and then the truss portions 41 are fixed by a fixing device.

As shown in fig. 13 to 14, a plurality of reinforcing ribs 33 are provided on the upper column 31, the plurality of reinforcing ribs 33 are respectively provided at two ends of the upper column 31, one side of each reinforcing rib is connected to the upper column 31, and the other side of each reinforcing rib is connected to the first mounting plate 311 or the top plate, and the plurality of reinforcing ribs 33 are arranged at intervals along the circumferential direction of the upper column 31, so as to reinforce the circumferential direction of the upper column 31. Lower column 32 also is equipped with a plurality of strengthening ribs 33 equally, and is a plurality of strengthening rib 33 is located respectively the both ends of lower column 32, and one side with lower column 32 connect one side with second mounting panel 321 or bottom plate 21 are connected, and are a plurality of strengthening rib 33 follows lower column 32's circumference interval is arranged, and is right lower column 32's circumference is strengthened.

In an embodiment, when the supporting column 3 is integrally disposed, a mounting portion is disposed on the supporting column 3, and one end of the truss portion 41 close to the supporting column is connected to the mounting portion. The mounting part can be arranged in the middle of the supporting column 3 or at a position close to the middle of the supporting column 3. The installation department can set up according to different demands or according to the shape and the size of different support column 3 and installation department, makes truss portion 41 quilt one end with the installation department carries out fixed mounting.

In some embodiments, the log periodic antenna 100 may further include a turntable 2 disposed at the bottom of the supporting column 3, and the turntable 2 is rotatably connected to the supporting column 3 and configured to drive the supporting column 3 to rotate. It can be understood that the rotary table 2 is connected with the bottom of the lower support, and the rotary table 2 can be arranged at the top of the iron tower 1, so as to realize logarithmic period axial rotation.

In an embodiment, the log periodic antenna 100 further includes a plurality of upper connectors 51 and a plurality of lower connectors 52, wherein one end of each upper connector 51 is fixed to the top end of the supporting column 3, and the other end is fixed to the supporting truss 4; one end of each lower connecting piece 52 is fixed at the bottom end of the supporting column 3, and the other end is fixed at the supporting truss 4; wherein, a plurality of the upper connecting members 51 and a plurality of the lower connecting members 52 are symmetrically arranged with respect to the supporting truss 4. So, the top of the support column 3 is connected with one end of the support truss 4 part through the upper connecting piece 51, the other end of the support truss 4 is fixed on the support column 3, the same one end of the lower connecting piece 52 is connected with the support truss 4, and the other end is connected with one end of the support truss 4, so that the support truss 4 is symmetrically connected with respect to the horizontal plane of the support truss 4, the two sides of the support truss 4 are uniformly stressed, the overall structural strength of the support truss 4 is improved, and the compactness and the safety of the log periodic antenna 100 are improved.

Specifically, the upper connecting member 51 and the lower connecting member 52 may be configured as a steel tube, a rope, or other connecting members for connection, the embodiment is illustrated by taking the rope as an example, and other types of connecting members may be configured according to different requirements.

As shown in fig. 7 to 9, in some embodiments, the support truss 4 includes a main truss 411 and a side truss 412, the upper connecting member 51 includes a first upper connecting member 511 and a second upper connecting member 512, the first upper connecting member 511 connects the main truss 411 and the top end of the support column 3, and the second upper connecting member 512 connects the side truss 412 and the top end of the support column 3. The main truss 411 may include a plurality of the first truss portions 4111, and the side truss 412 may include a plurality of the second truss portions 4121. The upper connection is connected to the top ends of the plurality of first truss portions 4111 and the support columns 3, and to the top ends of the plurality of second truss portions 4121 and the support columns 3. To strengthen the connection between the ends of the support truss 4 and the support columns 3.

Further, as shown in fig. 7, the main truss 411 includes two first truss portions 4111 disposed oppositely, the first upper connecting member 511 includes a first upper connecting portion 5111 and a second upper connecting portion 5112, one end of the first upper connecting portion 5111 and one end of the second upper connecting portion 5112 are connected to the two first truss portions 4111, and the other end is connected to the top end of the supporting column 3. Thus, the first upper connecting portion 5111 and the second upper connecting portion 5112 are respectively connected and oppositely arranged with the two first truss portions 4111, so that the two first truss portions 4111 oppositely arranged are symmetrical with respect to the supporting column 3, the structural symmetry is improved, and the structure of the log periodic antenna 100 is more stable.

As shown in fig. 2 and 5, the side truss 412 includes two second truss portions 4121 that are oppositely disposed, the second upper connecting member 512 includes a third upper connecting portion 5121 and a fourth upper connecting portion 5122, one end of each of the third upper connecting portion 5121 and the fourth upper connecting portion 5122 is connected to the two second truss portions 4121, and the other end is connected to the top end of the supporting column 3. In this way, the third upper connecting portion 5121 and the fourth upper connecting portion 5122 are respectively connected and oppositely disposed to form two second truss portions 4121, so that the two oppositely disposed second truss portions 4121 are symmetrical with respect to the supporting column 3, the structural symmetry is improved, and the structure of the log periodic antenna 100 is more stable.

Further, the support truss 4 includes a main truss 411 and a side truss 412, the lower connecting member 52 includes a first lower connecting member 521 and a second lower connecting member 521, the first lower connecting member 521 connects the main truss 411 and the bottom end of the support column 3, and the second lower connecting member 521 connects the side truss 412 and the bottom end of the support column 3. The main truss 411 may include a plurality of the first truss portions 4111, and the side truss 412 may include a plurality of the second truss portions 4121. The upper connection is connected to the top ends of the plurality of first truss portions 4111 and the support columns 3, and the top ends of the plurality of second truss portions 4121 and the support columns 3. To strengthen the connection between the ends of the support truss 4 and the support columns 3. So as to prevent the upper connecting piece 51 from connecting the supporting truss 4 on one side by itself, so that the supporting truss 4 is damaged by the force on one side of the structure.

Specifically, the first lower connecting member 521 includes a first lower connecting portion 5211 and a second lower connecting portion 5212, one end of the first lower connecting portion 5211 and one end of the second lower connecting portion 5212 are respectively connected to the two first truss portions 4111, and the other end is connected to the bottom end of the supporting column 3. The lower connection is connected to the bottom ends of the plurality of first truss portions 4111 and the supporting column 3, and to the ground ends of the plurality of second truss portions 4121 and the supporting column 3. To strengthen the connection between the ends of the support truss 4 and the support columns 3.

As shown in fig. 2, the second lower connecting member 521 includes a third lower connecting portion 5221 and a fourth lower connecting portion 5222, one end of the third lower connecting portion 5221 and one end of the fourth lower connecting portion 5222 are connected to the two second truss portions 4121, respectively, and the other end is connected to the bottom end of the supporting column 3. In this way, the third upper connecting portion 5121 and the fourth upper connecting portion 5122 are respectively connected and oppositely disposed to form two second truss portions 4121, so that the two oppositely disposed second truss portions 4121 are symmetrical with respect to the supporting column 3, the structural symmetry is improved, and the structure of the log periodic antenna 100 is more stable.

In some embodiments, as shown in fig. 6, the log periodic antenna 100 further comprises a plurality of truss connectors 54, each truss connector 54 connecting adjacent first truss portions 4111 and second truss portions 4121. In this way, the truss connecting portion 9 has one end connected to the first truss portion 4111 and the other end connected to the second truss portion 4121, and the truss connecting portion 9 can make the first truss portion 4111 and the second truss portion 4121 be stably connected in the plane of the supporting truss 4, so as to stabilize the structure of the supporting truss 4, it can be understood that the truss connecting portion 9 can be provided in plurality between two adjacent first truss portions 4111 and second truss portions 4121 according to the customer requirement and the structural length, which is not particularly limited herein.

Optionally, the log periodic antenna 100 further comprises a connecting device for fixedly connecting the plurality of upper connecting members 51 and the plurality of lower connecting members 52 with the supporting column 3 and the supporting truss 4. The connecting device is fixedly arranged on the supporting column 3 and the supporting truss 4, the upper connecting piece 51 and the lower connecting piece 52 can be movably connected or fixedly connected to the connecting device, and the upper connecting piece 51 and the lower connecting piece 52 can be conveniently arranged on the log periodic antenna 100 through the connecting device. The difficulty of installation is lightened.

Specifically, as shown in fig. 1 and 11, the connecting device may include a hanging ring, the upper connecting member 51 and the lower connecting member 52 are ropes, and the hanging ring is fixedly disposed on the supporting column 3 and the supporting truss 4, so that the connecting member is fixedly disposed in the hanging ring in a penetrating manner. In this way, the connection between the connector pair of the support column 3 and the support girder 4 can be facilitated. The quick assembly and disassembly is realized, the installation of the log periodic antenna 100 is simplified, and the working efficiency is improved.

In some embodiments, the log periodic antenna 100 further comprises an antenna face 6, the antenna face 6 comprising a plurality of antenna elements 61, the antenna elements 61 being connected to the main truss 411; wherein, the included angle between the main truss 411 and the antenna element 61 is smaller than 90 degrees. In this manner, the antenna face 6 is provided on the support truss 4, co-planar with the support truss 4, such that the antenna face 6 is spread out over the truss. The antenna surface 6 is composed of a plurality of antenna elements 61, the length of the antenna elements 61 is determined according to the required frequency, and each antenna element 61 has a length corresponding to a certain frequency, so that resonance is generated and the antenna operates in the frequency band. The included angle between the antenna element 61 and the main truss 411 is smaller than 90 degrees, so that the antenna element 61 can obtain a longer length of the antenna element 61 according to the pythagorean theorem under the supporting truss 4 with the same size. The width of the log periodic antenna 100 is reduced, thereby achieving miniaturization of the log periodic antenna 100. And the weight of the log periodic antenna 100 is uniformly distributed, and the structural rationality of the log period is improved.

Specifically, the log periodic antenna 100 further includes two supporting members, the two supporting members are respectively disposed on two sides of the main truss 411, one end of the antenna element 61 is connected to the main truss 411, and the other end is connected to the corresponding supporting member. The support is used to achieve the deployment of the antenna element 61 and the orientation of the antenna element 61 such that the log periodic antenna 100 has a transmitting end and a receiving end.

As shown in fig. 7, the main truss 411 has a first end and a second end opposite to each other, the first end is disposed at one end of the main truss 411 opposite to the end far from the supporting column 3, and the second end is disposed at the other end of the main truss 411 opposite to the end far from the supporting column 3. The first end is the front end of the main truss 411, the second end is the rear end of the main truss 411, and the length of the antenna element 61 is increased along the direction from the first end to the second end. The included angle between the antenna element 61 and the main truss 411 is arranged along the direction of the first end towards the second end in a decreasing mode. Such that the length of the log periodic antenna 100 may be gradually increased along the first end toward the second end.

Further, an included angle between the antenna element 61 and the main truss 411 is greater than or equal to 30 degrees. It can be understood that the included angle between the antenna element 61 and the main truss 411 is gradually decreased from the front end of the main truss 411 to the back, so that the antenna element 61 gradually increases from the front end to the back. However, since the length of the antenna element 61 is determined by the operating wavelength, the included angle between the antenna element 61 and the main truss 411 is greater than or equal to 30 degrees and less than 90 degrees.

In some embodiments, the log periodic antenna 100 further includes a plurality of side trusses 412, the side trusses 412 are symmetrically disposed on two sides of the main truss 411, the supporting member includes a side cable 53 and a supporting frame 4121a, the supporting frame 4121a is disposed on one end of the side truss 412 away from the supporting column 3, one end of the side cable 53 is connected to the main truss 411, and the other end is connected to the supporting frame 4121 a. As shown, the supporting frame 4121a may be configured as a triangular supporting frame 4121a, one end of which is connected to the end of the side truss 412 away from the supporting column 3, and the other end of which is connected to the first end of the main truss 411 through the side cable 53. So that one end of the antenna element 61 is connected to the main truss 411 and the other end is connected to the side cable 53 or the support 4121 a.

Further, the border 53 may include an insulating rope and a non-insulating rope, and when the insulating rope is used, the influence of the border 53 on the log periodic antenna 100 may be reduced, but the strength and durability of the existing insulating rope are far less than those of the non-insulating rope. But in most cases the non-insulated cords are electrically connected to the surrounding conductor when the log periodic antenna 100 is in operation, and the border 53 forms a surrounding conductor with respect to the support truss 4 and the antenna element 61. Greatly affecting the performance and frequency of the log periodic antenna 100.

In order to prevent the influence of the non-insulated cord on the periodic antenna and to ensure the strength and durability of the side cord 53. The border 53 in this embodiment is a steel cable, and the steel cable is segmented so that the steel cable does not have a large conductor length, thereby minimizing the influence of the border 53 on the log periodic antenna 100. To ensure the continuity of the side cable 53, the side cable 53 further includes a connecting insulator disposed at the space to connect the wire rope, thereby ensuring the continuity of the side cable 53. And the performance of the log periodic antenna 100 as a whole can be guaranteed.

As shown in fig. 6, the log periodic antenna 100 further includes a supporting rod 4111a, the supporting rod 4111a is disposed on the main truss 411, and two ends of the supporting rod 4111a are respectively connected to the side cables 53 disposed on two sides of the main truss 411. Even number bracing piece 4111a is arranged at the first end of the main truss 411, is vertically connected with the main truss 411, and is in the same horizontal plane, the length size of the antenna element 61 is determined according to the required frequency, and the length of each antenna element 61 corresponds to a certain frequency, so that each antenna element 61 has a certain length, and the bracing piece 4111a is arranged at the first end of the main truss 411, so that the length of the main truss 411 can be reduced, and further the overall length of the log periodic antenna 100 is reduced. The log periodic antenna 100 is miniaturized. And the supporting rod 4111a plays a certain role in protecting the antenna element 61 arranged at the first end.

As shown in fig. 6 and 12, in some embodiments, the log periodic antenna 100 further includes an insulating solenoid 611, the insulating solenoid 611 is disposed at an end of the antenna element 61 away from the main girder, and an end of the antenna element 61 away from the main girder is wound on the insulating solenoid 611. The insulated solenoid 611 is formed by winding the antenna element 61 at a certain number of turns and a certain length, and the length of the antenna element 61 is determined according to the required frequency, and the length of each antenna element 61 corresponds to a certain frequency, so as to generate resonance, thereby operating in this frequency band. The length of the antenna element 61 is frequency dependent and is responsive to the impedance of the antenna element 61 at that frequency. The insulating solenoid 611 also has a frequency characteristic, having an impedance corresponding to the frequency. In the log periodic antenna 100, the insulating spiral tube is arranged at one end of the antenna element 61 far away from the main truss. The lower the receiving frequency in the antenna is, the longer the wavelength is, the longer the length of the required antenna element 61 is, the insulating spiral tube is arranged at one end of the antenna element 61 of the log periodic antenna 100, the same physical length of the element can be utilized to prolong the electrical length of the antenna element 61, so that the antenna element 61 with a larger size is equivalent, the physical length of the element and the width of the supporting truss 4 are reduced, the physical size of the log periodic antenna 100 is further reduced, and the receiving function of a short-wave full frequency band is realized. Thereby reducing the volume and weight of the log periodic antenna 100 and improving the structural robustness of the antenna system.

Specifically, a user may set the log periodic antenna 100 according to the actual size of the log periodic antenna and the number of the antenna elements 61, and the user may select not less than 1 pair of antenna elements 61 to set the log periodic antenna, and certainly, may set 2 pairs, 4 pairs, 6 pairs, 8 pairs, and the like, which is not limited herein, as long as more short-wave frequency bands can be received, and the width of the supporting truss 4 and the length of the antenna elements 61 are reduced.

In one embodiment, as shown in fig. 2, the log periodic antenna 100 further includes feeding line uprights 7, and the feeding line uprights 7 are arranged at intervals along the main truss 411 and are vertically connected to the main truss 411. The feeder rod upright 7 stands on the upper end surface of the main truss 411. And the feeder uprights 7 are arranged linearly along the main truss 411.

Specifically, the feeder pole 7 includes an insulating plate 72 and a pole 71, and one end of the pole 71 is connected to the main truss 411, and the other end is connected to the insulating plate 72. The upright 71 is used for supporting the insulating plate 72, the upright 71 is made of an insulating material, and the upright 71 may be cylindrical, rectangular, polygonal, or the like, and is not limited herein.

As shown in fig. 1, the log periodic antenna 100 further includes two feeder lines 8, each feeder line 8 is sequentially connected to a plurality of the insulating plates 72, and projections of the two feeder lines 8 in a plane perpendicular to the vertical rod 71 are arranged to intersect. The feeder line 8 is arranged on the insulating plate 72 in a crossed manner, the main truss 411 is arranged on an egg-shaped insulator, and the antenna element 61 passes through the egg-shaped insulator and is fixed on the main truss 411, and is electrically connected with the feeder line 8 by bypassing the egg-shaped insulator. The two ends of the insulating plate 72 are provided with threading holes, the feeder line 8 is arranged in the threading holes in a penetrating manner, and the threading holes are separated by a certain distance, so that the feeder lines 8 cannot feed each other. The influence of the feed line 8 on the log periodic antenna 100 is reduced as much as possible.

The egg-shaped insulator is disposed such that the antenna element 61 can be fixedly connected to the main truss 411, and is insulated and electrically connected to the feeder line 8. Of course, in other embodiments, the egg-shaped insulator may be provided in other shapes. Such as spherical, cylindrical, etc. The setting may be performed as needed, and is not particularly limited herein.

Specifically, as shown in fig. 1 and 4, a plurality of crossing positions are formed between two feeder lines 8, and insulators are disposed at the crossing positions and interposed between the two feeder lines 8 so as to space the two feeder lines 8. Since the feeder lines 8 are arranged in a staggered manner, projections of the feeder lines 8 on a horizontal plane necessarily intersect, in order to prevent the feeder lines 8 from being short-circuited, the log periodic antenna 100 is provided with an insulator at the intersection of the feeder lines 8, so that the feeder lines 8 arranged in an intersecting manner are spaced apart from each other by a small distance.

As shown in fig. 3, the height of the feeder uprights 7 increases in sequence from the front end of the main truss 411 to the rear. The front end of the main truss 411, and the transmitting end and the receiving end of the log periodic antenna 100, so that since the antenna element 61 is arranged backward from the front end, the length of the antenna element increases, the wavelength increases, the affected range of the antenna element 61 increases, and the feeder line 8 needs to be arranged far away from the antenna element 61. So that the height of the feeder pole 7 increases in sequence backward along the front end of the main truss 411.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A log periodic antenna comprising

A support column extending in the up-down direction; and

2. The log periodic antenna of claim 1, wherein a plurality of said truss sections are located in a common horizontal plane.

3. A log periodic antenna as claimed in claim 2, wherein the angle between adjacent truss sections is greater than or equal to 80 degrees and less than or equal to 110 degrees.

4. A log periodic antenna as claimed in claim 3, wherein the number of said truss sections is four and the angle between two adjacent truss sections is 90 degrees.

5. The log periodic antenna as claimed in claim 1, wherein the plurality of truss sections includes two first truss sections disposed opposite to each other and two second truss sections disposed opposite to each other, the two first truss sections being integrally formed, and the two second truss sections being separately formed.

6. A log periodic antenna as claimed in claim 5, wherein the first truss section may be comprised of an insulated or uninsulated tube and the second truss section may be comprised of an insulated tube.

7. The log periodic antenna as claimed in any one of claims 1 to 6, wherein the support column comprises an upper column and a lower column, the upper column and the lower column are coaxially disposed, a first mounting plate is disposed at a bottom end of the upper column, a second mounting plate is disposed at a top end of the lower column, and a mounting gap is formed between the first mounting plate and the second mounting plate at an interval for mounting the plurality of truss portions.

8. The log periodic antenna as in claim 7, wherein a plurality of ribs are provided on said upper post, said plurality of ribs being spaced apart along a circumferential direction of said upper post;

9. The log periodic antenna as recited in claim 1, wherein the support post has a mounting portion, and wherein an end of the truss portion adjacent to the support post is connected to the mounting portion.

10. The log periodic antenna as in any of claims 1-9, further comprising a turntable disposed at a bottom of the support column, the turntable being rotatably coupled to the support column for rotating the support column.