Combined direction finding system for radio monitoring direction finding

Abstract

The utility model discloses a combined direction finding system for radio monitoring direction finding, which comprises an antenna mounting tower and a plurality of first low-frequency log-periodic line arrays annularly fixed on the antenna mounting tower, the plurality of first high-frequency log-periodic line arrays are annularly fixed on the antenna mounting tower and arranged at the upper part of the first low-frequency log-periodic line array, the direction-finding antenna assembly is fixed at the top of the antenna mounting tower, and the lightning rod is arranged at the top of the direction-finding antenna assembly; and the communication cabinet is connected with the first low-frequency log-periodic line array, the first high-frequency log-periodic line array and the direction-finding antenna assembly through communication cables. Through the above scheme, the antenna has the advantages of simple structure, comprehensive coverage, reliable installation and the like, and has very high practical value and popularization value in the technical field of direction-finding antennas.

Description

Technical Field

[0001] The utility model relates to the technical field of direction-finding antennas, in particular to a combined direction-finding system for radio monitoring and direction-finding. Background Art

[0002] A direction-finding antenna relies on the amplitude difference of electromagnetic waves from different receiving elements to determine the direction of incoming waves in free space. Prior art direction-finding methods primarily include vibration direction-finding, phase direction-finding, and time-difference direction-finding. Vibration direction-finding utilizes the directional characteristics of the antenna, determining direction based on the maximum or minimum value of the antenna's induced potential. This method involves rotating the antenna, and when the antenna output reaches an extreme value, the direction of the incoming wave is determined by the antenna's orientation. Phase direction-finding, on the other hand, involves measuring the phase difference between the received potentials of two or more antenna elements arranged in a specific configuration when an electromagnetic wave reaches two antennas with identical characteristics. Finally, time-difference direction-finding uses a method where the time difference between the electromagnetic wave reaching the receiving antenna is proportional to the path difference. Three direction-finding stations are used to measure the time difference between the signal's arrival at each station. Currently, prior art phase direction-finding cannot accurately determine the direction of weak signals or broadband FM signals.

[0003] Therefore, there is an urgent need to propose a combined direction-finding system for radio monitoring and direction-finding with a simple structure and comprehensive coverage. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a combined direction finding system for radio monitoring direction finding. The technical solution adopted by this utility model is as follows:

[0005] A combined direction-finding system for radio monitoring direction-finding includes an antenna mounting tower, a plurality of first low-frequency log-periodic linear arrays annularly fixed to the antenna mounting tower, a plurality of first high-frequency log-periodic linear arrays annularly fixed to the antenna mounting tower and positioned above the first low-frequency log-periodic linear arrays, a direction-finding antenna assembly fixed to the top of the antenna mounting tower, a lightning rod disposed on the top of the direction-finding antenna assembly, and a communication cabinet connected to the first low-frequency log-periodic linear array, the first high-frequency log-periodic linear array, and the direction-finding antenna assembly using a communication cable.

[0006] The first low-frequency log-periodic linear array includes a first mounting frame fixed to an antenna mounting tower, and a plurality of transverse terminals and longitudinal terminals fixed to the first mounting frame; the transverse terminals, longitudinal terminals and the first mounting frame together form a pyramid cone shape;

[0007] The first high-frequency log-periodic linear array includes a first fixing plate, a first mounting cover arranged on the first fixing plate, a first antenna plate, a second antenna plate, a third antenna plate and a fourth antenna plate arranged on the first fixing plate; the first antenna plate and the second antenna plate are arranged vertically; the third antenna plate and the fourth antenna plate are arranged vertically.

[0008] Furthermore, the direction-finding antenna assembly includes a lower mounting cover fixed to the top of the antenna mounting tower, an upper mounting cover covering the lower mounting cover, several first vertical antennas arranged in a ring shape in the lower mounting cover, several first horizontal antennas arranged in a ring shape in the lower mounting cover, several second vertical antennas arranged in a ring shape in the lower mounting cover, and a third vertical antenna arranged above the second vertical antennas; the first vertical antennas are arranged between adjacent first horizontal antennas; the second vertical antennas are placed above the first horizontal antenna and the first vertical antenna; and the third vertical antenna is placed at the center of the lower mounting cover.

[0009] Furthermore, a lower mounting platform is provided in the lower mounting cover, a plurality of first mounting holes are opened in a ring on the lower mounting platform, a first support frame is fixed on the lower mounting platform, an upper mounting platform is provided on the first support frame, and a second support frame is provided on the upper mounting platform; the first vertical antennas are fixed in the first mounting holes one by one; the third vertical antenna is fixed on the second support frame; a plurality of second mounting holes are opened in a ring on the upper mounting platform; the second vertical antennas are fixed in the second mounting holes one by one.

[0010] Furthermore, a plurality of cable through holes are provided in a ring shape on the lower mounting platform.

[0011] Furthermore, a plurality of first mounting columns are provided at the bottom of the first fixing plate.

[0012] Preferably, the frequency of the first low-frequency logarithmic periodic linear array is 100 MHz to 1.5 GHz.

[0013] Furthermore, the frequency of the first high-frequency log-periodic linear array is 8.0 GHz to 18.0 GHz.

[0014] Preferably, the frequency of the first vertical antenna is 20-1300 MHz; the frequency of the second vertical antenna is 1300-3000 MHz; the frequency of the third vertical antenna is 3000-8000 MHz; and the frequency of the first horizontal antenna is 40-13000 MHz.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The utility model arranges a plurality of first low-frequency logarithmic periodic line arrays and a plurality of first high-frequency logarithmic periodic line arrays in a ring shape, so that the amplitude direction finding angle is more accurate.

[0017] (2) The utility model sets a nine-channel direction-finding antenna assembly, and sets a first vertical antenna, a first horizontal antenna, a second vertical antenna and a third vertical antenna in the direction-finding antenna assembly, which covers 20 to 8000 MHz and accurately covers the full frequency band of direction-finding signals.

[0018] (3) The utility model ensures that the first vertical antenna and the second vertical antenna can be reliably installed by setting a lower mounting platform, a first support frame, an upper mounting platform and a second support frame, and opening a first mounting hole, a cable through hole and a second mounting hole, and saves installation space, making the direction-finding antenna assembly smaller.

[0019] In summary, the utility model has the advantages of simple structure, comprehensive coverage, and reliable installation, and has high practical value and promotion value in the field of direction-finding antenna technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope of protection. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure 2 It is a partial schematic diagram of the utility model.

[0023] Figure 3 This is a schematic structural diagram of the first low-frequency logarithmic periodic line array in the present invention.

[0024] Figure 4 This is a structural diagram of the first high-frequency logarithmic periodic line array in the present invention.

[0025] Figure 5 This is a schematic diagram of the internal structure of the first high-frequency logarithmic periodic line array in the present invention.

[0026] Figure 6 This is a schematic structural diagram of the direction-finding antenna assembly in the present invention.

[0027] Figure 7 This is a schematic diagram of the internal structure of the direction-finding antenna assembly in the present invention.

[0028] Figure 8 This is the standing wave test curve of the first low-frequency logarithmic periodic linear array in the present invention.

[0029] Figure 9 This is the standing wave test curve of the first high-frequency logarithmic periodic linear array in the present invention at 1.5 GHz to 8.0 GHz.

[0030] Figure 10 This is the standing wave test curve of the first high-frequency logarithmic periodic linear array in the present invention at 8.0 GHz to 18.0 GHz.

[0031] Figure 11 This is the E / E waveguide pattern of the first low-frequency logarithmic periodic linear array in the present invention at 80 MHz.

[0032] Figure 12 This is the H / H waveguide pattern of the first low-frequency logarithmic periodic linear array in the present invention at 80 MHz.

[0033] Figure 13 This is the E / E waveguide pattern of the first high-frequency log-periodic linear array in the present invention at 4000 MHz.

[0034] Figure 14 This is the H / H waveguide pattern of the first high-frequency log-periodic linear array in the present invention at 4000 MHz.

[0035] Figure 15 This is the E / E waveguide pattern of the first high-frequency log-periodic linear array in the present invention at 16000 MHz.

[0036] Figure 16 This is the directivity pattern of the H / H waveguide of the first high-frequency log-periodic linear array in the present invention at 16000 MHz.

[0037] Figure 17 This is the test curve of the 3dB beam width of the utility model.

[0038] In the above drawings, the component names corresponding to the reference numerals are as follows:

[0039] 1. Communication cabinet; 2. Communication room; 3. Antenna mounting tower; 4. First low-frequency log-periodic line array; 5. First high-frequency log-periodic line array; 6. Direction-finding antenna assembly; 7. Lightning rod; 41. First mounting bracket; 42. Horizontal terminal; 43. Vertical terminal; 51. First mounting column; 52. First mounting cover; 53. First fixing plate; 54. First antenna board; 55. Third antenna board; 56. Second antenna board; 57. Fourth antenna board; 61. Lower mounting cover; 62. Upper mounting cover; 6301. Lower mounting platform; 6302. First mounting hole; 6303. First vertical antenna; 6304. First horizontal antenna; 6305. First supporting bracket; 6306. Cable through-hole; 6401. Upper mounting platform; 6402. Second mounting hole; 6403. Second vertical antenna; 6404. Second supporting bracket; 6501. Third vertical antenna. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of this application more clear, the present invention is further described below with reference to the accompanying drawings and examples. Implementation methods of this invention include, but are not limited to, the following examples. All other implementations obtained by persons of ordinary skill in the art based on the examples in this application without creative effort are within the scope of protection of this application.

[0041] Example

[0042] In this embodiment, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0043] In the description and claims of this embodiment, the terms "first" and "second" are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different objects rather than to describe a specific order of objects.

[0044] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0045] In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more. For example, "multiple processing units" means two or more processing units; "multiple systems" means two or more systems.

[0046] like Figures 1 to 7 As shown, this embodiment provides a combined direction-finding system for radio monitoring direction-finding, comprising an antenna mounting tower 3, a plurality of first low-frequency log-periodic linear arrays 4 annularly fixed to the antenna mounting tower 3, a plurality of first high-frequency log-periodic linear arrays 5 annularly fixed to the antenna mounting tower 3 and positioned above the first low-frequency log-periodic linear arrays 4, a direction-finding antenna assembly 6 fixed to the top of the antenna mounting tower 3, a lightning rod 7 disposed on top of the direction-finding antenna assembly 6, and a communication cabinet 1 connected to the first low-frequency log-periodic linear arrays 4, the first high-frequency log-periodic linear arrays 5, and the direction-finding antenna assembly 6 via a communication cable. The first low-frequency log-periodic linear arrays 4 and the first high-frequency log-periodic linear arrays 5 overlap in a one-to-one correspondence in the longitudinal direction, i.e., the positions of the six first low-frequency log-periodic linear arrays 4 and the six first high-frequency log-periodic linear arrays 5 correspond one-to-one.

[0047] In this embodiment, the first low-frequency log-periodic linear array 4 includes a first mounting frame 41 fixed to the antenna mounting tower 3, and a plurality of transverse terminals 42 and longitudinal terminals 43 fixed to the first mounting frame 41. The transverse terminals 42, longitudinal terminals 43, and the first mounting frame 41 together form a pyramidal shape. The frequency of the first low-frequency log-periodic linear array 4 is 100 MHz to 1.5 GHz.

[0048] In this embodiment, the first high-frequency log-periodic linear array 5 includes a first fixing plate 53, a first mounting cover 52 disposed on the first fixing plate 53, and a first antenna plate 54, a second antenna plate 56, a third antenna plate 55, and a fourth antenna plate 57 disposed on the first fixing plate 53. Several first mounting posts 51 are disposed at the bottom of the first fixing plate 53. In this embodiment, the first antenna plate 54 and the second antenna plate 56 are arranged perpendicularly; the third antenna plate 55 and the fourth antenna plate 57 are arranged perpendicularly. In this embodiment, the frequency of the first high-frequency log-periodic linear array 5 is between 8.0 GHz and 18.0 GHz.

[0049] In this embodiment, the direction-finding antenna assembly 6 includes a lower mounting cover 61 fixed to the top of the antenna mounting tower 3, an upper mounting cover 62 covering the lower mounting cover 61, a plurality of first vertical antennas 6303 arranged in a ring shape within the lower mounting cover 61, a plurality of first horizontal antennas 6304 arranged in a ring shape within the lower mounting cover 61, a plurality of second vertical antennas 6403 arranged in a ring shape within the lower mounting cover 61, and a third vertical antenna 6501 arranged above the second vertical antennas 6403. The first vertical antennas 6303 are arranged between adjacent first horizontal antennas 6304, i.e., the first vertical antennas 6303 and the first horizontal antennas 6304 are arranged crosswise. Furthermore, the second vertical antennas 6403 are positioned above the first horizontal antennas 6304 and the first vertical antennas 6303, and the third vertical antenna 6501 is positioned at the center of the lower mounting cover 61. The frequency of the first vertical antenna 6303 is 20 to 1300 MHz; the frequency of the second vertical antenna 6403 is 1300 to 3000 MHz; the frequency of the third vertical antenna 6501 is 3000 to 8000 MHz; and the frequency of the first horizontal antenna 6304 is 40 to 13000 MHz.

[0050] To ensure secure installation, a lower mounting platform 6301 is provided within the lower mounting cover 61. Several first mounting holes 6302 are formed in a circular pattern on the lower mounting platform 6301. Several first support brackets 6305 are secured to the lower mounting platform 6301. An upper mounting platform 6401 is mounted on the first support brackets 6305, and several second support brackets 6404 are mounted on the upper mounting platform 6401. In this embodiment, the first vertical antennas 6303 are secured in their respective first mounting holes 6302, and the third vertical antenna 6501 is secured to the second support brackets 6404. Furthermore, several second mounting holes 6402 are formed in a circular pattern on the upper mounting platform 6401, and the second vertical antennas 6403 are secured in their respective second mounting holes 6402. Furthermore, several cable through-holes 6306 are formed in a circular pattern on the lower mounting platform 6301.

[0051] In order to verify the antenna performance of this embodiment, standing wave and direction tests are carried out. Figures 8 to 17 It can be seen that the standing waves are all less than 3, and the antenna has good receiving efficiency.

[0052] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any changes based on the design principles of the present invention and any changes made through non-creative work on this basis shall fall within the scope of protection of the present invention.

Claims

1. A combined direction finding system for radio monitoring direction finding, characterized in that: The invention comprises an antenna installation tower (3), a plurality of first low-frequency logarithmic periodic linear arrays (4) annularly fixed on the antenna installation tower (3), a plurality of first high-frequency logarithmic periodic linear arrays (5) annularly fixed on the antenna installation tower (3) and placed above the first low-frequency logarithmic periodic linear array (4), a direction-finding antenna assembly (6) fixed on the top of the antenna installation tower (3), a lightning rod (7) arranged on the top of the direction-finding antenna assembly (6), and a communication cabinet (1) connected to the first low-frequency logarithmic periodic linear array (4), the first high-frequency logarithmic periodic linear array (5) and the direction-finding antenna assembly (6) by using a communication cable; The first low-frequency logarithmic periodic linear array (4) comprises a first mounting frame (41) fixed on the antenna mounting tower (3), and a plurality of transverse terminals (42) and longitudinal terminals (43) fixed on the first mounting frame (41); the transverse terminals (42), longitudinal terminals (43) and the first mounting frame (41) together form a pyramid cone shape; The first high-frequency logarithmic periodic linear array (5) comprises a first fixing plate (53), a first mounting cover (52) arranged on the first fixing plate (53), a first antenna plate (54), a second antenna plate (56), a third antenna plate (55) and a fourth antenna plate (57) arranged on the first fixing plate (53); the first antenna plate (54) and the second antenna plate (56) are arranged vertically; and the third antenna plate (55) and the fourth antenna plate (57) are arranged vertically.

2. A combined direction finding system for radio monitoring direction finding according to claim 1, characterized in that: The direction-finding antenna assembly (6) comprises a lower mounting cover (61) fixed on the top of the antenna mounting tower (3), an upper mounting cover (62) covering the lower mounting cover (61), a plurality of first vertical antennas (6303) arranged in an annular shape in the lower mounting cover (61), a plurality of first horizontal antennas (6304) arranged in an annular shape in the lower mounting cover (61), a plurality of second vertical antennas (6403) arranged in an annular shape in the lower mounting cover (61), and a third vertical antenna (6501) arranged on the upper part of the second vertical antenna (6403); the first vertical antennas (6303) are arranged between adjacent first horizontal antennas (6304); the second vertical antennas (6403) are arranged on the upper part of the first horizontal antennas (6304) and the first vertical antenna (6303); and the third vertical antenna (6501) is arranged on the center of the circle of the lower mounting cover (61).

3. The combined direction finding system for radio monitoring direction finding according to claim 2, characterized in that: Also includes: A lower mounting platform (6301) is arranged in a lower mounting cover (61), a plurality of first mounting holes (6302) are annularly provided on the lower mounting platform (6301), a first support frame (6305) is fixed on the lower mounting platform (6301), an upper mounting platform (6401) is arranged on the first support frame (6305), and a second support frame (6404) is arranged on the upper mounting platform (6401); the first vertical antennas (6303) are fixed in the first mounting holes (6302) in a one-to-one correspondence; the third vertical antenna (6501) is fixed on the second support frame (6404); a plurality of second mounting holes (6402) are annularly provided on the upper mounting platform (6401); and the second vertical antennas (6403) are fixed in the second mounting holes (6402) in a one-to-one correspondence.

4. A combined direction finding system for radio monitoring direction finding according to claim 3, characterized in that: The lower mounting platform (6301) is provided with a plurality of cable through holes (6306) in a circular shape.

5. The combined direction finding system for radio monitoring direction finding according to claim 1, characterized in that: A plurality of first mounting columns (51) are provided at the bottom of the first fixing plate (53).

6. The combined direction finding system for radio monitoring direction finding according to claim 1, characterized in that: The frequency of the first low-frequency logarithmic periodic linear array (4) is 100 MHz to 1.5 GHz.

7. The combined direction finding system for radio monitoring direction finding according to claim 1, characterized in that: The frequency of the first high-frequency logarithmic periodic linear array (5) is 8.0 GHz to 18.0 GHz.

8. The combined direction finding system for radio monitoring direction finding according to claim 3, characterized in that: The frequency of the first vertical antenna (6303) is 20 to 1300 MHz; the frequency of the second vertical antenna (6403) is 1300 to 3000 MHz; the frequency of the third vertical antenna (6501) is 3000 to 8000 MHz; and the frequency of the first horizontal antenna (6304) is 40 to 13000 MHz.

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