High-power short-wave log-periodic antenna

Abstract

The utility model discloses a high-power short-wave log-periodic antenna which comprises an antenna truss horizontally arranged above a V-shaped frame, a plurality of stay wire supporting rods and truss supporting towers are vertically arranged above the antenna truss, and the top ends of the adjacent stay wire supporting rods and the top ends of the adjacent truss supporting towers are connected through parallel stay wires. A plurality of antenna faces are evenly arranged on the two sides, perpendicular to each other in the horizontal direction, of the antenna truss, the antenna faces correspond to the stay wire supporting rods one by one and are perpendicular to the stay wire supporting rods one by one, the stay wire supporting rods and the antenna faces which are perpendicular to each other are connected through antenna face stay wires, and the adjacent antenna faces are connected through antenna face lower stay wires. Matchers are arranged at the two ends of the antenna truss, and an assembly line is arranged on the antenna truss; through the improvement of the product, the antenna can bear 20KW continuous wave emission, is free of sparking or excessive heating, is high in antenna gain and small in standing wave, and achieves the effects of improving the electrical performance index, guaranteeing the stable performance and improving the electrical reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to a high-power short-wave logarithmic periodic antenna. Background Art

[0002] The log-periodic antenna is an antenna constructed according to a special theory, that is, when the antenna is transformed according to a certain proportional factor, its structure remains unchanged. This design makes the antenna performance that appears at a certain frequency f repeat over a wider frequency range (such as f to nf), where n is a constant greater than 1. Therefore, the electrical performance of the antenna shows periodic changes over a wide frequency range, thus realizing the characteristics of a non-frequency-variant antenna. The log-periodic antenna also has a linear polarization characteristic, and its electric field polarization direction is parallel to the direction of the oscillator.

[0003] There are many forms of log-periodic antennas, including log-periodic dipole antennas, monopole antennas, resonant V-shaped antennas and helical antennas, among which log-periodic dipole antennas are the most common type. This antenna uses sky wave transmission, which has extremely strong radiation, so sky wave transmission is mainly used for short-wave long-distance communication.

[0004] The shortwave log-periodic antenna is an antenna with non-frequency-varying and wideband characteristics. It has achieved the stability of electrical performance in a wide frequency range through special design. This antenna has broad application prospects in the fields of communications, radar, etc.

[0005] However, in the field of shortwave radar and broadcasting, a long-distance signal transmission system is required. Due to the particularity of this antenna, namely high-power, continuous wave transmission, excessive voltage, and long-term full-load operation, it may break down and ignite, causing a fire if not handled with care. Therefore, this places high demands on the antenna structure and electrical reliability. Utility Model Content

[0006] In view of the above technical problems in the related art, the utility model proposes a high-power shortwave log-periodic antenna, which can overcome the above shortcomings of the prior art.

[0007] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0008] A high-power shortwave log-periodic antenna;

[0009] The high-power shortwave log-periodic antenna includes an antenna truss horizontally arranged above a V-shaped frame, a plurality of guy wire support rods and a truss support tower are vertically arranged above the antenna truss, the top ends of adjacent guy wire support rods and the top ends of adjacent truss support towers are connected by parallel guy wires, a plurality of antenna surfaces are evenly arranged on both sides of the antenna truss that are perpendicular to each other in the horizontal direction, a plurality of antenna surfaces correspond to a plurality of guy wire support rods one by one and are vertically arranged, the guy wire support rods that are perpendicular to each other are connected to the antenna surfaces by antenna surface guy wires, and adjacent antenna surfaces are connected by guy wires under the antenna surfaces, matchers are arranged at both ends of the antenna truss, and a collection line is arranged on the antenna truss.

[0010] Furthermore, a plurality of the guy wire support rods are evenly distributed at equal intervals, two truss support towers are provided, and the bottom end of the truss support tower corresponds to the top end position of the V-shaped frame.

[0011] Furthermore, a rotary joint and a servo system for adjusting direction are provided below the V-shaped frame.

[0012] Furthermore, a lightning rod is provided on the top of each of the truss support towers.

[0013] Furthermore, the height of the antenna surface from the ground is 20m, and the size of the antenna surface is less than or equal to 26m*26m.

[0014] Furthermore, the power capacity of the high-power shortwave log-periodic antenna is 20KW, the frequency range is 6-26MHz, the antenna gain is greater than or equal to 8dBi, and the polarization mode is horizontal polarization.

[0015] Furthermore, the antenna truss, the guy wire support rod and the truss support tower are all made of square steel profiles.

[0016] Furthermore, the antenna surface is coated with polytetrafluoroethylene and epoxy material coatings.

[0017] Furthermore, the antenna surface is coated with polytetrafluoroethylene and epoxy material coatings.

[0018] The beneficial effects of the utility model are as follows: through the optimized and improved design of the product of the utility model, the antenna can withstand 20KW continuous wave transmission without sparking or excessive heating, the antenna gain is high, and the standing wave is small, thereby achieving the effect of improving electrical performance indicators, ensuring stable performance, and improving electrical reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a first-view structural diagram of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0021] Figure 2 It is a second perspective structural schematic diagram of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0022] Figure 3 It is a third-view structural diagram of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0023] Figure 4 A high-power short-wave log-periodic antenna according to an embodiment of the utility model Figure 3 Detailed view of position C in the middle;

[0024] Figure 5 A high-power short-wave log-periodic antenna according to an embodiment of the utility model Figure 3 Detailed view of point D in the middle;

[0025] Figure 6 A high-power short-wave log-periodic antenna according to an embodiment of the utility model Figure 3 Detail of point E in the middle;

[0026] Figure 7 A high-power short-wave log-periodic antenna according to an embodiment of the utility model Figure 3 Detail of F in the middle;

[0027] Figure 8 It is a schematic diagram of a simulation model of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0028] Fig. 9 It is a simulation curve diagram of the standing wave ratio of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0029] Fig.10 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna at a frequency of 6 MHz and at a 90-degree azimuth plane according to an embodiment of the utility model;

[0030] Fig.11It is a directional pattern simulation curve of a 6MHz frequency 48-degree elevation plane of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0031] Fig.12 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna at a frequency of 10 MHz and at an azimuth plane of 90 degrees according to an embodiment of the utility model;

[0032] Fig.13 It is a directional pattern simulation curve of a 10MHz frequency 64-degree elevation plane of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0033] Fig.14 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna at a frequency of 14 MHz and at an azimuth plane of 90 degrees according to an embodiment of the utility model;

[0034] Fig.15 It is a directional pattern simulation curve of a 14MHz frequency 72-degree elevation plane of a high-power short-wave log-periodic antenna according to an embodiment of the utility model;

[0035] Fig.16 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna at 18MHz frequency and 90 degrees azimuth plane according to an embodiment of the utility model;

[0036] Fig.17 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna with a frequency of 18 MHz and a pitch plane of 76 degrees according to an embodiment of the utility model;

[0037] Fig.18 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna at a frequency of 22 MHz and at an azimuth plane of 90 degrees according to an embodiment of the utility model;

[0038] Fig.19 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna with a frequency of 22MHz and a pitch plane of 78 degrees according to an embodiment of the utility model;

[0039] Fig. 20 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna at a frequency of 26 MHz and at an azimuth plane of 90 degrees according to an embodiment of the utility model;

[0040] Fig.21 It is a directional pattern simulation curve of a high-power short-wave log-periodic antenna at a frequency of 6 MHz and an elevation plane of 80 degrees according to an embodiment of the utility model;

[0041] In the figure: 1. Antenna truss; 2. Wire support rod; 3. Truss support tower; 4. Antenna surface; 5. V-shaped frame; 6. Rotary joint; 7. Matching device; 8. Parallel wire; 9. Antenna surface wire; 10. Antenna surface underwire; 11. Servo system; 12. Lightning rod; 13. Assembly wire; 14. Hexagonal bolt. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0043] It should be understood that in the description of the embodiments of the present utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0044] like Figure 1-7 As shown, a high-power shortwave log-periodic antenna according to an embodiment of the utility model comprises an antenna truss 1 horizontally arranged above a V-shaped frame 5, a plurality of guy wire support rods 2 and a truss support tower 3 are vertically arranged above the antenna truss 1, the top ends of adjacent guy wire support rods 2 and the top ends of adjacent truss support towers 3 are connected by parallel guy wires 8, a plurality of antenna surfaces 4 are evenly arranged on both sides of the antenna truss 1 perpendicular to each other in the horizontal direction, a plurality of the antenna surfaces 4 correspond to a plurality of guy wire support rods 2 one by one and are vertically arranged, the mutually perpendicular guy wire support rods 2 and the antenna surfaces 4 are connected by antenna surface guy wires 9, and adjacent antenna surfaces 4 are connected by antenna surface lower guy wires 10, matchers 7 are provided at both ends of the antenna truss 1, and a collection line 13 is provided on the antenna truss 1.

[0045] In some specific embodiments, a plurality of the guy wire support rods 2 are evenly distributed at equal intervals, two truss support towers 3 are provided, and the bottom end of the truss support tower 3 corresponds to the top end position of the V-shaped frame 5 .

[0046] In some specific embodiments, a rotary joint 6 and a servo system 11 for adjusting direction are provided below the V-shaped frame 5 .

[0047] In some specific embodiments, a lightning rod 12 is provided on the top of each of the truss support towers 3 .

[0048] In some specific embodiments, the height of the antenna surface 4 from the ground is 20 m, and the size of the antenna surface 4 is less than or equal to 26 m*26 m.

[0049] In some specific embodiments, the high-power shortwave log-periodic antenna has a power capacity of 20KW, a frequency range of 6-26MHz, an antenna gain greater than or equal to 8dBi, and a polarization mode of horizontal polarization.

[0050] In some specific embodiments, the antenna truss 1, the guy wire support rod 2 and the truss support tower 3 are all made of square steel profiles.

[0051] In some specific embodiments, the surface of the antenna surface 4 is coated with polytetrafluoroethylene and epoxy material coating.

[0052] In some specific embodiments, the antenna truss 1, the guy wire support rod 2, the truss support tower 3 and the V-shaped frame 5 are fixedly connected by external hexagonal bolts 14 or internal hexagonal bolts.

[0053] In order to facilitate understanding of the above technical solution of the present utility model, the above technical solution of the present utility model is further explained below.

[0054] In specific use, according to the high-power shortwave log-periodic antenna described in the utility model, the technical indicators of the antenna are: antenna frequency range: 6MHz-26MHz; antenna gain: ≥8dBi; power capacity: 20KW (carrier power); polarization mode: horizontal polarization; directivity: directional, main direction ±180; antenna height: 20 meters; antenna surface size: ≤26m*26m.

[0055] Key Benefits:

[0056] 1. Materials:

[0057] 1. Use polytetrafluoroethylene and epoxy materials to improve the physical insulation of the antenna and avoid high voltage breakdown. Due to the rationality of its dielectric constant, it also ensures the normal technical indicators of the antenna;

[0058] 2. The truss structure uses square steel profiles, which has the advantage of low cost and easy purchase.

[0059] 2. Electrical aspects:

[0060] 1. Physical performance: no sparking and no deformation under the uninterrupted transmission of 20Kw continuous wave power;

[0061] 2. Electrical performance: Under 20Kw continuous wave power uninterrupted transmission, standing wave, gain, etc. meet the technical requirements.

[0062] The high-power short-wave log-periodic antenna described in the utility model is a high-gain directional antenna specially designed for high-power continuous wave radar. This antenna can maintain good technical indicators and functions under the condition of 20KW uninterrupted transmission. After nearly 3 years of observation, this antenna has no sparking, excessive heating phenomenon, and stable performance.

[0063] To sum up, with the help of the above-mentioned technical scheme of the utility model, through the optimization and improvement design of the product of the utility model, the antenna can withstand 20KW continuous wave transmission without sparking or excessive heating, the antenna gain is high, and the standing wave is small, thereby achieving the effect of improving electrical performance indicators, ensuring stable performance, and improving electrical reliability.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-power shortwave log-periodic antenna, characterized in that: The invention comprises an antenna truss (1) horizontally arranged above a V-shaped frame (5), a plurality of wire support rods (2) and a truss support tower (3) being vertically arranged above the antenna truss (1), the top ends of adjacent wire support rods (2) and the top ends of adjacent truss support towers (3) being connected by parallel wires (8), a plurality of antenna surfaces (4) being evenly arranged on two sides of the antenna truss (1) perpendicular to each other in the horizontal direction, the plurality of antenna surfaces (4) corresponding to the plurality of wire support rods (2) one by one and being vertically arranged, the mutually perpendicular wire support rods (2) and the antenna surfaces (4) being connected by antenna surface wires (9), and the adjacent antenna surfaces (4) being connected by antenna surface underwires (10), the two ends of the antenna truss (1) being provided with matchers (7), and the antenna truss (1) being provided with a collection line (13).

2. A high-power short-wave log-periodic antenna according to claim 1, characterized in that: The plurality of wire support rods (2) are evenly distributed at equal intervals, two truss support towers (3) are provided, and the bottom end of the truss support tower (3) corresponds to the top end of the V-shaped frame (5).

3. A high-power short-wave log-periodic antenna according to claim 2, characterized in that: A rotary joint (6) and a servo system (11) for adjusting direction are provided below the V-shaped frame (5).

4. A high-power short-wave log-periodic antenna according to claim 2, characterized in that: The top of each truss support tower (3) is provided with a lightning rod (12).

5. A high-power short-wave log-periodic antenna according to claim 1, characterized in that: The height of the antenna surface (4) from the ground is 20m, and the size of the antenna surface (4) is less than or equal to 26m*26m.

6. A high-power short-wave log-periodic antenna according to claim 1, characterized in that: The power capacity of the high-power short-wave log-periodic antenna is 20KW, the frequency range is 6-26MHz, the antenna gain is greater than or equal to 8dBi, and the polarization mode is horizontal polarization.

7. A high-power short-wave log-periodic antenna according to claim 1, characterized in that: The antenna truss (1), the guy wire support rod (2) and the truss support tower (3) are all made of square steel profiles.

8. A high-power short-wave log-periodic antenna according to claim 1, characterized in that: The surface of the antenna surface (4) is coated with polytetrafluoroethylene and epoxy material coatings.

9. A high-power shortwave log-periodic antenna according to any one of claims 1 to 8, characterized in that: The antenna truss (1), the wire support rod (2), the truss support tower (3) and the V-shaped frame (5) are all fixedly connected by external hexagonal bolts (14) or internal hexagonal bolts.

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