Broadband dual-frequency dual-polarized antenna based on magnetoelectric dipole

Abstract

The invention discloses a broadband dual-frequency dual-polarized antenna based on a magnetoelectric dipole, and relates to the antenna technology, and the antenna comprises a floor (1) which provides a metal ground; the number of the n-shaped feeder lines (3) is two, the feeding mode is a magnetoelectric dipole mode, the n-shaped feeder lines are coupled with the corresponding oscillators, any n-shaped feeder line is of a circuitous long-short structure, and the two n-shaped feeder lines are arranged in a crossed mode. The number of the vibrators (4) is two, and the two pairs of vibrators (4) are arranged in a cross shape and are fixed to a preset height away from the floor (1); and the support outer conductor (2) is arranged on the floor (1) and provides support for the vibrator (4), and a corresponding connecting cavity is arranged in the support outer conductor (2) based on a roundabout long-short structure of any n-shaped feeder line, so that the long part of any n-shaped feeder line is led out to a specified joint, and the short part of any n-shaped feeder line is suspended. According to the antenna, the narrow bandwidth of a dipole antenna can be broken through, and the technical problem that a feed structure is unreliable is solved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole. Background Art

[0002] In classical antenna theory and practical applications, the electric dipole (hereinafter referred to as dipole) antenna is the most commonly used antenna form, because the dipole antenna has a simple structure, good directivity, and is easy to make. Many broadband structure antennas use dipoles as antenna units or use deformed dipole forms. However, traditional dipoles also have disadvantages such as narrow bandwidth, unreliable feeding structure, and unstable radiation pattern within the bandwidth.

[0003] At present, dual-polarized antennas are mainly realized by orthogonal dipole antennas, but their bandwidth is limited, and in actual use, the feeding method of the dipole requires the inner core of the coaxial line to be welded to a dipole arm, making its structure relatively unreliable. Feeding by magneto-electric dipole not only solves the defects of bandwidth and feeding method, but also realizes dual-frequency by using the structure of two pairs of dipoles of unequal length. The instability of the radiation pattern can be effectively improved by designing a coupling plate structure on the upper arm of the dipole. Summary of the invention

[0004] The embodiments of the present application provide a broadband dual-frequency dual-polarized antenna based on a magnetoelectric dipole, and provide a dual-linear polarized antenna with multi-band and wide-band characteristics. Two pairs of non-similar orthogonal metal vibrators are used to achieve dual frequency and dual polarization, and antenna feeding is completed based on the structure of the magnetoelectric dipole, thus overcoming the technical difficulties of the dipole antenna's narrow bandwidth and unreliable feeding structure.

[0005] The embodiment of the present application provides a broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole, including:

[0006] Floor 1, providing metal ground;

[0007] Π-type feeder 3, the number is 2, the feeding mode is the magnetoelectric dipole form, the Π-type feeder is coupled with the corresponding vibrator, any of the Π-type feeders is a circuitous long and short structure, and the two Π-type feeders are cross-arranged;

[0008] Vibrators 4, the number is 2, two pairs of vibrators 4 are arranged crosswise in a "cross shape" and fixed at a predetermined height from the floor 1;

[0009] The supporting outer conductor 2 is arranged on the floor 1 to provide support for the vibrator 4, and a corresponding connecting cavity is arranged therein based on any of the Π-type feeders as a circuitous long and short structure, so that the long part of any of the Π-type feeders can be led out to a designated joint, and the short part of any of the Π-type feeders can be suspended.

[0010] Optionally, it also includes:

[0011] A drainage branch 5 is connected to a pair of the vibrators and is disposed toward the floor 1. The drainage branch 5 is used to extend the current path to achieve low-frequency impedance matching;

[0012] The branch length and shape of the drainage branch 5 are adapted to the required bandwidth.

[0013] Optionally, it further comprises: a coupling sheet 6, connected to another pair of the vibrators, in sheet shape, arranged away from the floor 1, and used to adjust the shape of the directional pattern;

[0014] The length and shape of the coupling piece 6 are adapted according to the shape of the directional pattern to be adjusted.

[0015] Optionally, the coupling plate 6 is connected to another pair of the vibrators via a support column 7, and the support column 7 is made of insulating material.

[0016] Optionally, the two Π-shaped feed lines 3 cross each other, and a support sheet 8 for isolation is provided between them, and the support sheet 8 is made of insulating material.

[0017] Optionally, the coarse and fine segments of the two Π-type feed lines 3 are optimized.

[0018] Optionally, when the two pairs of vibrators 4 are of different specifications, two mutually orthogonal polarizations are formed, so that different frequency bands can be realized by using different vibrators.

[0019] Optionally, the vibrator 4 is a hollow graphic structure.

[0020] The embodiment of the present application provides a dual-linear polarization antenna with multi-band and wide-band characteristics, adopts two pairs of non-similar orthogonal metal oscillators to realize dual-frequency and dual-polarization, completes antenna feeding based on the structure of magnetoelectric dipole, and overcomes the technical difficulties of narrow bandwidth and unreliable feeding structure of dipole antenna.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1The overall structure of the dual-polarized antenna based on magnetoelectric dipole according to the embodiment of the present application is schematically shown;

[0024] Figure 2 A partial schematic diagram of a vibrator and a Π-shaped feed line of a dual-polarized antenna based on a magnetoelectric dipole according to an embodiment of the present application;

[0025] Figure 3 A schematic top view of a dual-polarized antenna based on a magnetoelectric dipole according to an embodiment of the present application;

[0026] Figure 4 A cross-sectional view of a dual-polarized antenna based on a magnetoelectric dipole according to an embodiment of the present application;

[0027] Figure 5 Another cross-sectional view of the dual-polarized antenna based on magnetoelectric dipole according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] The present application embodiment provides a broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole, such as Figure 1 , Figure 2 As shown, including:

[0030] Floor 1, providing metal ground;

[0031] The number of Π-type feeders 3 is 2, and the feeding mode is a magnetoelectric dipole form. The Π-type feeder is coupled with the corresponding vibrator. Any of the Π-type feeders is a circuitous long and short structure, that is, Figure 2 The two winding parts shown include a long part and a short part, and the two Π-shaped feed lines are arranged crosswise. Figure 3 As shown, the two Π-type feed lines 3 cross each other, and a support sheet 8 for isolation is provided between them, and the support sheet 8 is made of insulating material to prevent short circuit. The bandwidth of the Π-type feed line of the present application is wider than that of the ordinary dipole antenna, and the feeding does not require welding, and the feeding is coupled by the structure in the supporting outer conductor.

[0032] Oscillator 4, quantity is 2, such as Figure 2 As shown, two pairs of vibrators 4 are arranged crosswise in a "cross shape" and fixed at a predetermined height from the floor 1. In a specific example, as Figure 1The two pairs of dipoles shown are arranged in a "cross shape" and are fixed to a certain height above the floor by supporting an outer conductor 2. A pair of dipoles 4 is coupled to a Π-type feed line 3.

[0033] The supporting outer conductor 2 is arranged on the floor 1 to provide support for the vibrator 4. Figure 4 , Figure 5 As shown, a corresponding connection cavity is provided in the supporting outer conductor 2 based on the circuitous long-short structure of any of the Π-type feeders, so that the long part of any of the Π-type feeders is led out to a designated connector, and the short part of any of the Π-type feeders is suspended. In some embodiments, the long part of any of the Π-type feeders is led out to an SMA connector.

[0034] The embodiment of the present application provides a dual-linear polarization antenna with multi-band and wide-band characteristics, adopts two pairs of non-similar orthogonal metal oscillators to realize dual-frequency and dual-polarization, completes antenna feeding based on the structure of magnetoelectric dipole, and overcomes the technical difficulties of narrow bandwidth and unreliable feeding structure of dipole antenna.

[0035] In some embodiments, it also includes:

[0036] The drainage branch 5 is connected to a pair of the vibrators and is disposed toward the floor 1. The drainage branch 5 is used to extend the current path to achieve low-frequency impedance matching. The branch length and shape of the drainage branch 5 are adapted to the required bandwidth. If the required bandwidth is narrow, no drainage branch is required.

[0037] In some embodiments, it further comprises: a coupling sheet 6 connected to another pair of the vibrators, in a sheet shape and arranged away from the floor 1, for adjusting the shape of the directional pattern; the length and shape of the coupling sheet 6 are adapted according to the shape of the directional pattern to be adjusted. If the directional pattern requirement is not strict, the coupling sheet may not be added.

[0038] In some embodiments, the coupling plate 6 is connected to another pair of the vibrators through a support column 7, and the support column 7 is made of insulating material. In some embodiments, the support column 7 and the support plate 8 can be made of non-conductive materials such as polytetrafluoroethylene or epoxy glass cloth.

[0039] In some embodiments, Figure 3 , Figure 4 As shown, the thickness of the two Π-type feed lines 3 is segmented and optimized. By segmenting and optimizing the thickness of the Π-type feed line 3, the complexity of the feeding structure is further improved while achieving a wider impedance bandwidth.

[0040] In some embodiments, the vibrators 4, when two pairs of vibrators 4 are of different specifications, form two mutually orthogonal polarizations, so as to realize different frequency bands by using different vibrators. The vibrators can also be the same, with the same vibrator shape and the same working frequency band.

[0041] In some embodiments, the vibrator 4 is a hollowed-out structure. The hollowed-out structure can reduce weight and wind resistance. The vibrator can also be non-hollowed. On the other hand, different hollowed-out shapes can be used to adjust the surface current of the antenna vibrator. The hollowed-out structure can be combined with other optional structures for impedance matching.

[0042] The broadband dual-frequency dual-polarized antenna of the present application can utilize the form of magnetoelectric dipoles, and by designing the Π-type feeder part into a feeding structure with an impedance transformation effect, it can improve the complexity of the feeding structure while achieving a wider impedance bandwidth. By adding a coupling plate structure to the vibrator wall, the antenna pattern is effectively improved. In addition, the broadband dual-frequency dual-polarized antenna of the present application optimizes the antenna current path by adding different branches to different vibrators, thereby achieving a broadband dual-frequency radiation effect.

[0043] It should be noted that in the various embodiments of the present application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0044] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0045] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole, characterized in that: include: Floor (1), providing a metal ground; Π-type feeders (3), the number of which is 2, the feeding mode is a magneto-electric dipole form, the Π-type feeders are coupled with corresponding oscillators, any of the Π-type feeders is a circuitous long-short structure, and the two Π-type feeders are arranged in a cross-like manner; Vibrators (4), the number of which is 2, two pairs of vibrators (4) are arranged crosswise in a "cross shape" and fixed at a predetermined height from the floor (1); A supporting outer conductor (2) is arranged on the floor (1) to provide support for the vibrator (4), wherein a corresponding connection cavity is arranged therein based on any of the Π-type feeders as a circuitous long-short structure, so that the long portion of any of the Π-type feeders can be led out to a designated joint, and the short portion of any of the Π-type feeders can be suspended in the air.

2. The broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole according to claim 1, characterized in that: Also includes: A drainage branch (5) is connected to the pair of vibrators and is disposed toward the floor (1), wherein the drainage branch (5) is used to extend the current path and achieve low-frequency impedance matching; The branch length and shape of the drainage branch (5) are adapted to the required bandwidth.

3. The broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole according to claim 2, characterized in that: Also includes: A coupling sheet (6), connected to another pair of the oscillators, in sheet shape and arranged away from the floor (1), for adjusting the shape of the directional pattern; The length and shape of the coupling piece (6) are adapted according to the shape of the directional pattern to be adjusted.

4. The broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole according to claim 3, characterized in that: The coupling plate (6) is connected to another pair of the vibrators via a supporting column (7), and the supporting column (7) is made of insulating material.

5. The broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole according to claim 1, characterized in that: The two Π-shaped feed lines (3) cross each other, and a support sheet (8) for isolation is provided between them, and the support sheet (8) is made of insulating material.

6. The broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole according to claim 5, characterized in that: The coarse and fine segments of the two Π-type feed lines (3) are optimized.

7. The broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole according to claim 1, characterized in that: When the two pairs of oscillators (4) are of different specifications, two mutually orthogonal polarizations are formed, so that different frequency bands can be realized by using different oscillators.

8. The broadband dual-frequency dual-polarization antenna based on magnetoelectric dipole according to claim 1, characterized in that: The vibrator (4) is a hollow pattern structure.

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