Multi-channel direction finding antenna for radio monitoring direction finding

Abstract

The utility model discloses a multichannel direction finding antenna for radio monitoring direction finding, which comprises a lower mounting cover fixed at the top of an antenna mounting tower, an upper mounting cover covering the lower mounting cover, a plurality of first vertical antennas annularly arranged in the lower mounting cover, and a plurality of first horizontal antennas annularly arranged in the lower mounting cover, the second vertical antennas are annularly arranged in the lower mounting cover; the third vertical antennas are arranged at the upper parts of the second vertical antennas; the first vertical antennas are arranged between the adjacent first horizontal antennas; the second vertical antenna is arranged at the upper parts of the first horizontal antenna and the first vertical antenna; and the third vertical antenna is arranged on the circle center of the lower mounting cover. According to the scheme, the antenna has the advantages of being simple in structure, reliable in 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 multi-channel direction-finding antenna for radio monitoring and direction-finding. Background Art

[0002] A direction-finding antenna is a device that relies on the amplitude difference of electromagnetic waves received by different receiving units to determine the direction of the incoming wave in free space, so as to achieve the direction-finding function. Among them, the existing direction-finding methods mainly include: vibration method for direction-finding, phase method for direction-finding, and time difference method for direction-finding. Among them, the vibration method for direction-finding uses the direction characteristics of the antenna and determines the direction of the incoming wave according to the maximum or minimum value of the induced electromotive force of the antenna. It rotates the antenna, and when the output of the antenna reaches an extreme value, the direction of the incoming wave is determined by the direction of the antenna. In addition, in the phase method for direction-finding, when the radio wave reaches two antennas with the same characteristics, there is a phase difference between the received electromotive forces due to the wave path difference. The direction of the incoming wave can be determined by measuring the phase difference of the received electromotive forces of two or more antenna elements arranged in a certain structure. Finally, in the time difference method for direction-finding, the time difference for the radio wave to reach the receiving antenna is proportional to the wave path difference, and the time difference between the signal reaching each station is measured by using three direction-finding stations.

[0003] Currently, the existing direction-finding antenna such as the disclosed technology with the publication number of CN118367329A and the name of a lightweight and compact airborne direction-finding antenna array includes a sealed cavity. An annular hollowed-out bracket is arranged in the sealed cavity. A first antenna array, a second antenna array, and a third antenna array are arranged on the annular hollowed-out bracket. The first antenna array, the second antenna array, and the third antenna array are arranged in sequence from the outer edge of the annular hollowed-out bracket to the center of the annular hollowed-out bracket. The top of the second antenna array is at the same height as the top of the first antenna array. The third antenna array is located above the first antenna array. A radio frequency matrix switch electrically connected to the first antenna array, the second antenna array, and the third antenna array is arranged at the bottom of the sealed cavity. The first antenna array, the second antenna array, the third antenna array, and the radio frequency matrix switch form a three-channel seven-element spatial spectrum direction-finding system. The disadvantage of this technology is that the three-channel seven-element has poor capture ability for frequency-hopping signals and cannot completely capture the emitted micro-level signals.

[0004] Therefore, there is an urgent need to propose a multi-channel direction-finding antenna for radio monitoring and direction-finding with a simple structure and reliable installation. Summary of the Utility Model

[0005] In view of the above problems, the purpose of the present utility model is to provide a multi-channel direction-finding antenna for radio monitoring and direction-finding. The technical solution adopted by the present utility model is as follows:

[0006] A multi-channel direction-finding antenna for radio monitoring and direction finding, which includes a lower mounting cover fixed on the top of an antenna mounting tower, an upper mounting cover covering the lower mounting cover, several first vertical antennas arranged in a ring in the lower mounting cover, several first horizontal antennas arranged in a ring in the lower mounting cover, several second vertical antennas arranged in a ring 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 antennas and the first vertical antennas; the third vertical antenna is placed at the center of the lower mounting cover.

[0007] Further, a lower mounting platform is arranged in the lower mounting cover, several first mounting holes annularly opened on the lower mounting platform, a first support frame fixed on the lower mounting platform, an upper mounting platform arranged on the first support frame, and a second support frame arranged on the upper mounting platform; the first vertical antennas are fixedly arranged in the first mounting holes one by one; the third vertical antenna is fixed on the second support frame; several second mounting holes are annularly opened on the upper mounting platform; the second vertical antennas are fixedly arranged in the second mounting holes one by one.

[0008] Further, several cable through holes are annularly opened on the lower mounting platform.

[0009] Further, the first mounting holes are in an L shape.

[0010] Preferably, nine first horizontal antennas, first vertical antennas and second vertical antennas are provided.

[0011] 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; the frequency of the first horizontal antenna is 40 - 13000 MHz.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] (1) By providing a nine-channel direction-finding antenna assembly and arranging a first vertical antenna, a first horizontal antenna, a second vertical antenna and a third vertical antenna in the direction-finding antenna assembly, the present utility model covers 20 - 8000 MHz and can cover the full-band direction-finding signal.

[0014] (2) By providing a lower mounting platform, a first support frame, an upper mounting platform and a second support frame, and opening first mounting holes, cable through holes and second mounting holes, the present utility model ensures the reliable installation of the first vertical antenna and the second vertical antenna, saves the installation space, and makes the direction-finding antenna assembly smaller in volume.

[0015] In summary, the utility model has the advantages of simple structure, comprehensive coverage, reliable installation, etc., and has high practical value and popularization value in the technical field of direction-finding antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the protection scope. For those skilled in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a structural schematic diagram of the present utility model.

[0018] Figure 2 It is a partial schematic diagram of the present utility model.

[0019] Figure 3 It is a structural schematic diagram of the first low-frequency log-periodic line array in the present utility model.

[0020] Figure 4 It is a structural schematic diagram of the first high-frequency log-periodic line array in the present utility model.

[0021] Figure 5 It is an internal structural schematic diagram of the first high-frequency log-periodic line array in the present utility model.

[0022] Figure 6 It is a structural schematic diagram of the direction-finding antenna assembly in the present utility model.

[0023] Figure 7 It is an internal structural schematic diagram of the direction-finding antenna assembly in the present utility model.

[0024] Figure 8 It is a standing wave test curve of 1 GHz to 3 GHz in the present utility model.

[0025] Figure 9 It is a standing wave test curve of 3 GHz to 8 GHz in the present utility model.

[0026] Figure 10 It is a standing wave test curve of 20 MHz to 1.3 GHz in the present utility model.

[0027] In the above-mentioned drawings, the component names corresponding to the reference numerals are as follows:

[0028] 1. Communication cabinet; 2. Communication room; 3. Antenna installation 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 post; 52. First mounting cover; 53. First fixing plate; 54. First antenna board; 56. Second antenna board; 55. Third antenna board; 57. Fourth antenna board; 61. Lower mounting cover; 62. Upper mounting cover; 6301. Lower mounting table; 6302. First mounting hole; 6303. First vertical antenna; 6304. First horizontal antenna; 6305. First support frame; 6306. Cable through hole; 6401. Upper mounting table; 6402. Second mounting hole; 6403. Second vertical antenna; 6404. Second support frame; 6501. Third vertical antenna. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present utility model with reference to the accompanying drawings and embodiments. The implementation manners of the present utility model include but are not limited to the following embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0030] Embodiment

[0031] In this embodiment, the term "and / or" only describes the associated relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.

[0032] The terms "first" and "second" in the description and claims of this embodiment are used to distinguish different objects, rather than to describe a specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, rather than to describe the specific order of the target objects.

[0033] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0034] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" refers to two or more. For example, a plurality of processing units refers to two or more processing units; a plurality of systems refers to two or more systems.

[0035] As Figures 1 to 7 shown, this embodiment provides a combined direction-finding system for radio monitoring and direction-finding, which includes an antenna installation tower 3, several first low-frequency log-periodic line arrays 4 annularly fixed on the antenna installation tower 3, several first high-frequency log-periodic line arrays 5 annularly fixed on the antenna installation tower 3 and located above the first low-frequency log-periodic line arrays 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 log-periodic line arrays 4, the first high-frequency log-periodic line arrays 5 and the direction-finding antenna assembly 6 by communication cables. Among them, the first low-frequency log-periodic line arrays 4 and the first high-frequency log-periodic line arrays 5 coincide with each other one by one in the longitudinal direction, that is, the positions of the 6 first low-frequency log-periodic line arrays 4 correspond to those of the 6 first high-frequency log-periodic line arrays 5 one by one.

[0036] In this embodiment, the first low-frequency log-periodic line array 4 includes a first mounting bracket 41 fixed on the antenna installation tower 3, several transverse terminals 42 and longitudinal terminals 43 fixed on the first mounting bracket 41; the transverse terminals 42, the longitudinal terminals 43 and the first mounting bracket 41 together form a pyramid cone shape. Among them, the frequency of the first low-frequency log-periodic line array 4 is 100 MHz to 1.5 GHz.

[0037] In this embodiment, the first high-frequency log-periodic line array 5 includes a first fixing plate 53, a first mounting cover 52 arranged on the first fixing plate 53, a first antenna board 54, a second antenna board 55, a third antenna board 55 and a fourth antenna board 57 arranged on the first fixing plate 53. Among them, several first mounting posts 51 are arranged at the bottom of the first fixing plate 53. In this embodiment, the first antenna board 54 and the second antenna board 55 are arranged vertically; the third antenna board 55 and the fourth antenna board 57 are arranged vertically. In this embodiment, the frequency of the first high-frequency log-periodic line array 5 is 8.0 GHz to 18.0 GHz.

[0038] 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, several first vertical antennas 6303 annularly arranged inside the lower mounting cover 61, several first horizontal antennas 6304 annularly arranged inside the lower mounting cover 61, several second vertical antennas 6403 annularly arranged inside the lower mounting cover 61, and a third vertical antenna 6501 arranged above the second vertical antennas 6403. Among them, the first vertical antennas 6303 are arranged between adjacent first horizontal antennas 6304, that is, the first vertical antennas 6303 and the first horizontal antennas 6304 are arranged in a cross pattern. In addition, the second vertical antennas 6403 are placed above the first horizontal antennas 6304 and the first vertical antennas 6303, and the third vertical antenna 6501 is placed at the center of the lower mounting cover 61. The frequency of the first vertical antenna 6303 is 20 - 1300 MHz; the frequency of the second vertical antenna 6403 is 1300 - 3000 MHz; the frequency of the third vertical antenna 6501 is 3000 - 8000 MHz; the frequency of the first horizontal antenna 6304 is 40 - 13000 MHz

[0039] For reliable installation, a lower mounting platform 6301 is provided inside the lower mounting cover 61. Several first mounting holes 6302 are annularly formed on the lower mounting platform 6301. Several first support frames 6305 are fixed on the lower mounting platform 6301. An upper mounting platform 6401 is arranged on the first support frames 6305. Several second support frames 6404 are arranged on the upper mounting platform 6401. In this embodiment, the first vertical antennas 6303 are fixedly mounted in the first mounting holes 6302 one by one, and the third vertical antenna 6501 is fixed on the second support frames 6404. In addition, several second mounting holes 6402 are annularly formed on the upper mounting platform 6401, and the second vertical antennas 6403 are fixedly mounted in the second mounting holes 6402 one by one. At the same time, several cable through holes 6306 are annularly formed on the lower mounting platform 6301.

[0040] In order to verify the antenna performance of this embodiment, the following standing wave test is specifically carried out. The standing wave of this antenna is less than 3, indicating that the receiving efficiency is relatively good.

[0041] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention. Any changes made by adopting the design principle of the present invention and non-creative labor based on this shall fall within the protection scope of the present invention.

Claims

1. A multi-channel direction-finding antenna for radio monitoring and direction finding, which is arranged at the top of an antenna installation tower (3), and is characterized in that, It includes a lower mounting cover (61) fixed to the top of an antenna mounting tower (3), an upper mounting cover (62) covering the lower mounting cover (61), several first vertical antennas (6303) arranged annularly inside the lower mounting cover (61), several first horizontal antennas (6304) arranged annularly inside the lower mounting cover (61), several second vertical antennas (6403) arranged annularly inside 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 placed above the first horizontal antennas (6304) and the first vertical antennas (6303); the third vertical antenna (6501) is placed at the center of the circle of the lower mounting cover (61); the number of the first horizontal antennas (6304), the first vertical antennas (6303) and the second vertical antennas (6403) is the same.

2. The multi-channel direction-finding antenna for radio monitoring and direction-finding according to claim 1, characterized in that, It further includes: a lower mounting table (6301) arranged inside the lower mounting cover (61), several first mounting holes (6302) annularly formed on the lower mounting table (6301), a first support frame (6305) fixed to the lower mounting table (6301), an upper mounting table (6401) arranged on the first support frame (6305), and a second support frame (6404) arranged on the upper mounting table (6401); the first vertical antennas (6303) are fixedly arranged in the first mounting holes (6302) one by one; the third vertical antenna (6501) is fixed to the second support frame (6404); several second mounting holes (6402) are annularly formed on the upper mounting table (6401); the second vertical antennas (6403) are fixedly arranged in the second mounting holes (6402) one by one.

3. The multi-channel direction-finding antenna for radio monitoring and direction-finding according to claim 2, characterized in that, Several cable through holes (6306) are annularly formed on the lower mounting table (6301).

4. A multi-channel direction-finding antenna for radio monitoring and direction-finding according to claim 2 or 3, characterized in that The first mounting holes (6302) are in an L shape.

5. A multi-channel direction-finding antenna for radio monitoring and direction-finding according to claim 2 or 3, characterized in that, The frequency of the first vertical antennas (6303) is 20 - 1300 MHz; the frequency of the second vertical antennas (6403) is 1300 - 3000 MHz; the frequency of the third vertical antennas (6501) is 3000 - 8000 MHz; the frequency of the first horizontal antennas (6304) is 40 - 13000 MHz.

6. The multi-channel direction-finding antenna for radio monitoring and direction-finding according to claim 2 or 3, characterized in that, There are nine of the first horizontal antennas (6304), the first vertical antennas (6303) and the second vertical antennas (6403) respectively.

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