AOA array antenna

Abstract

The utility model discloses an AOA array antenna in the field of wireless communication, which comprises a first antenna, a second antenna, a third antenna and a bottom support arranged on the lower portions of the first antenna, the second antenna and the third antenna, the first antenna, the second antenna and the third antenna are identical in structure and are respectively composed of a metal oscillator A, a metal oscillator B, a metal short-circuit piece and a plastic fixing piece, and the metal oscillator A, the metal oscillator B, the metal short-circuit piece and the plastic fixing piece are arranged on the bottom support. And the metal oscillator A and the metal oscillator B are respectively arranged above and below the plastic fixing piece. Each antenna unit is formed by four groups of 45-degree polarized dipoles which are symmetrically distributed in a central rotation manner along the center of the support, the four groups of dipoles are connected through a one-to-four equal power division network, and electromagnetic waves radiated by the dipoles are orthogonal in pairs and have a phase difference of 90 degrees, so that the whole antenna unit forms a circularly polarized antenna with an omnidirectional radiation pattern; the array units form an equilateral triangle array at the interval smaller than one half of the wavelength, the interval is smaller, and the omni-directionality is higher.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication, specifically an AOA array antenna. Background Technology

[0002] The existing AOA antennas in UWB communication have the following problems:

[0003] 1. Bandwidth Issues: UWB is a popular communication technology for indoor positioning, favored by the market due to its high positioning accuracy. However, UWB requires a very large channel bandwidth, with each channel occupying 500MHz of frequency band. Currently, commonly used frequency bands are 4GHz (3.7-4.2GHz), 6.5GHz (6.25-6.75GHz), and 8GHz (7.75-8.25GHz). Such a large bandwidth presents significant challenges to antenna design.

[0004] 2. Radiation Pattern Issues: There are currently two types of UWB positioning technologies: TDOA and AOA. AOA technology requires three antennas, with the spacing between them less than half a wavelength, and the radiation pattern must be omnidirectional. However, when the antenna spacing is less than half a wavelength, mutual reflections between antennas often result in very poor omnidirectional radiation patterns. Therefore, small spacing and omnidirectionality become a contradictory problem in antenna design.

[0005] Therefore, those skilled in the art have provided an AOA array antenna to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide an AOA array antenna to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An AOA array antenna includes antenna one, antenna two, antenna three, and a bottom bracket disposed at the lower part of antenna one, antenna two, and antenna three. Antenna one, antenna two, and antenna three have the same structure, each consisting of a metal vibrator A, a metal vibrator B, a metal short-circuit component, and a plastic fixing component. The metal vibrator A and the metal vibrator B are respectively disposed above and below the plastic fixing component.

[0009] As a further embodiment of this utility model: four fixing grooves are evenly distributed around the outer circumference of the plastic fastener, and the metal oscillator A and the metal oscillator B are fixed in the fixing grooves of the plastic fastener by a clamping method.

[0010] As a further embodiment of this utility model: the metal oscillator A and the metal oscillator B are connected by a metal short-circuit component, and both the metal oscillator A and the metal oscillator B consist of a central bridging component, a narrow metal sheet with a length of about half a wavelength, and a wide metal sheet with a length of about half a wavelength.

[0011] As a further embodiment of this utility model: the narrow metal sheet and the wide metal sheet are alternately formed on the periphery of the central bridging member.

[0012] As a further embodiment of this utility model: the wide and narrow metal plates of the metal oscillator A and the metal oscillator B are arranged and connected in the opposite order, that is, when the arrangement of metal oscillator A is: wide-narrow-wide-narrow..., the arrangement of metal oscillator B is: narrow-wide-narrow-wide..., and metal oscillator A and metal oscillator B are assembled according to the corresponding width and narrowness.

[0013] As a further embodiment of this utility model: the midline of the length of the pair of wide and narrow metal plates at the very end of the metal oscillator A and the metal oscillator B is connected by a metal short-circuit device, and the coaxial braid and conductor are respectively connected to the first pair of wide and narrow metal plates of the metal oscillator A and the metal oscillator B.

[0014] As a further embodiment of this utility model: the first antenna, the second antenna, and the third antenna are arranged in an equilateral triangle or an isosceles right triangle.

[0015] As a further embodiment of this utility model: the bottom support is a hollow structure, and a cable sheath is fixedly installed inside it, and a cable connected to the antenna is installed inside the cable sheath.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] Each antenna element in this application consists of four sets of 45-degree polarized dipoles distributed in a central rotational symmetry along the center of the support. The four sets of dipoles are connected by a one-to-four power divider network. Since the electromagnetic waves radiated by the dipoles are orthogonal to each other and have a phase difference of 90 degrees, the entire antenna element forms a circularly polarized antenna with an omnidirectional radiation pattern. The array elements are arranged in an equilateral triangular array with a spacing of less than half a wavelength, resulting in a smaller spacing and stronger omnidirectionality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 The explosion of antenna one in this utility model Figure 1 ;

[0020] Figure 3 The explosion of antenna one in this utility model Figure 2 .

[0021] In the diagram: 1. Antenna 1; 101. Metal vibrator A; 1011. Narrow metal sheet; 1012. Wide metal sheet; 1013. Middle bridging component; 102. Metal vibrator B; 103. Plastic fixing component; 1031. Locking groove; 104. Metal short-circuit component; 2. Antenna 2; 3. Antenna 3; 4. Bottom bracket; 5. Cable sheath; 6. Cable. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-3 In this embodiment of the present invention, an AOA array antenna includes an antenna 1, an antenna 2, an antenna 3, and a bottom bracket 4 disposed at the lower part of the antenna 1, antenna 2, and antenna 3. The antennas 1, 2, and 3 have the same structure, each consisting of a metal vibrator A101, a metal vibrator B102, a metal short-circuit component 104, and a plastic fixing component 103. The metal vibrator A101 and the metal vibrator B102 are respectively disposed above and below the plastic fixing component 103.

[0024] The plastic fastener 103 has four locking grooves 1031 evenly distributed around its outer circumference, and the metal oscillator A101 and the metal oscillator B102 are fixed in the locking grooves 1031 of the plastic fastener 103 by a pressing method, which facilitates disassembly and assembly.

[0025] Metal oscillator A101 and metal oscillator B102 are connected by metal short-circuit component 104, and both metal oscillator A101 and metal oscillator B102 consist of a central bridging component 1013, a narrow metal sheet 1011 with a length of about half a wavelength, and a wide metal sheet 1012 with a length of about half a wavelength.

[0026] Narrow metal sheet 1011 and wide metal sheet 1012 are alternately formed around the central bridging member 1013.

[0027] Among them, the wide metal pieces 1012 and narrow metal pieces 1011 of metal oscillators A101 and B102 are connected in the opposite order. That is, when the arrangement of metal oscillators A101 is: wide-narrow-wide-narrow..., the arrangement of metal oscillators B102 is: narrow-wide-narrow-wide.... Metal oscillators A101 and B102 are assembled according to the corresponding width and narrowness.

[0028] Among them, the pair of wide and narrow metal plates 1011 at the very end of the metal oscillator A101 and the metal oscillator B102 are connected by a metal short-circuit device 104 along their length centerline, and the coaxial braid and conductor are respectively connected to the first pair of wide and narrow metal plates 1011 of the metal oscillator A101 and the metal oscillator B102.

[0029] Among them, antenna 1, antenna 2, and antenna 3 are arranged in an equilateral triangle or an isosceles right triangle.

[0030] The bottom bracket 4 is a hollow structure, and a cable sheath 5 is fixedly installed inside it. The cable sheath 5 contains a cable 6 that is connected to the antenna.

[0031] The working principle of this utility model is as follows: Each antenna element of this application consists of four groups of 45-degree polarized dipoles distributed in a central rotational symmetry along the center of the support. The four groups of dipoles are connected by a one-to-four power dividing network. Since the electromagnetic waves radiated by the dipoles are orthogonal to each other and have a phase difference of 90 degrees, the entire antenna element forms a circularly polarized antenna with an omnidirectional radiation pattern. The array elements form an equilateral triangular array with a spacing of less than half the wavelength, resulting in a smaller spacing and stronger omnidirectionality.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An AOA array antenna, comprising antenna one (1), antenna two (2), antenna three (3) and a bottom support (4) disposed below antenna one (1), antenna two (2) and antenna three (3), characterized in that: The antennas 1 (1), 2 (2) and 3 (3) have the same structure, each consisting of a metal vibrator A (101), a metal vibrator B (102), a metal short-circuit component (104) and a plastic fixing component (103). The metal vibrator A (101) and the metal vibrator B (102) are respectively positioned above and below the plastic fixing component (103).

2. An AOA array antenna according to claim 1, characterized in that: The plastic fastener (103) has four locking grooves (1031) evenly distributed around its outer circumference, and the metal oscillator A (101) and the metal oscillator B (102) are fixed in the locking grooves (1031) of the plastic fastener (103) by a pressing method.

3. An AOA array antenna according to claim 1, characterized in that: The metal oscillator A (101) and the metal oscillator B (102) are connected by a metal short-circuit device (104), and both the metal oscillator A (101) and the metal oscillator B (102) consist of a central bridging device (1013), a narrow metal sheet (1011) with a length of about half a wavelength, and a wide metal sheet (1012) with a length of about half a wavelength.

4. An AOA array antenna according to claim 3, characterized in that: The narrow metal sheet (1011) and the wide metal sheet (1012) are alternately formed around the central bridging member (1013).

5. An AOA array antenna according to claim 3, characterized in that: The wide metal strips (1012) and narrow metal strips (1011) of the metal oscillator A (101) and the metal oscillator B (102) are connected in opposite order, and the metal oscillator A (101) and the metal oscillator B (102) are assembled according to the method of corresponding width and narrowness.

6. An AOA array antenna according to claim 3, characterized in that: The metal oscillator A (101) and the metal oscillator B (102) are connected by a metal short-circuit device (104) along the length centerline of the pair of wide and narrow metal plates (1011) at the very end of the metal oscillator A (101) and the metal oscillator B (102). The coaxial braid and conductor are respectively connected to the first pair of wide and narrow metal plates (1011) of the metal oscillator A (101) and the metal oscillator B (102).

7. An AOA array antenna according to claim 1, characterized in that: The antennas 1 (1), 2 (2), and 3 (3) are arranged in an equilateral triangle or an isosceles right triangle.

8. An AOA array antenna according to claim 1, characterized in that: The bottom support (4) is a hollow structure, and a cable sheath (5) is fixedly installed inside it. A cable (6) connected to the antenna is installed inside the cable sheath (5).

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