Double-sided wide-beam wall-mounted antenna in H-plane arrangement

Abstract

The invention discloses a double-sided wide-beam wall-mounted antenna in H-plane arrangement. The double-sided wide-beam wall-mounted antenna comprises a double-peak-shaped perforated metal plate, a printing strip layer, a half-wave vibrator, a micro-strip rotating groove feeder and a metal ground. Short and thick and thin and long folded I-shaped structures, double-peak-shaped perforated metal plates and half-wave vibrators arranged on an H surface are combined; the short and thick folded I-shaped structure is used for broadening and low-frequency decoupling of low-frequency E-plane wave beams, the thin and long folded I-shaped structure is used for broadening and high-frequency decoupling of E-plane and H-plane wave beams, and the bimodal perforated metal plate is used for broadening middle-frequency-band E-plane wave beams and low-frequency H-plane wave beams and has low-frequency resonance capacity. The H-plane-arranged double-sided wide-beam wall-mounted antenna with wide bandwidth is realized, and the H-plane-direction diagram decoupling and beam broadening degree can be considered at the same time.

Description

Technical Field

[0001] The invention relates to a microwave communication device, in particular to a wide-beam wall-mounted antenna. Background Art

[0002] Wall-mounted antennas are mainly used in indoor distributed antenna coverage systems. They have a wide working bandwidth and support a variety of communication systems such as 3G, 4G, 5G, GSM, CDMA, etc. Half-power beam width is an important indicator of wall-mounted antennas. Wide beam width is conducive to improving the indoor wireless signal coverage range, and double-sided wide-beam wall-mounted antennas can further improve the signal coverage of the overall indoor space, thereby providing better signal connections for smart devices everywhere in the room. H The polarization direction of the wall-mounted antennas arranged in a plane is perpendicular to the arrangement direction. H The directional pattern distortion of the surface H The decoupling of the directional pattern of the plane must be solved at the same time, and the beam broadening method must satisfy H Therefore, it is necessary to propose H The solution for double-sided wide beam wall-mounted antennas arranged on a plane.

[0003] at present H There are three main methods for implementing a wide beam antenna arranged on a surface: the first method controls the amplitude of the I-shaped strip current on both sides of the polarization direction of the patch antenna to achieve E The broadening of the surface beam, but failed to achieve H Beam broadening is not considered. H The first method is to decouple the directional pattern of the two surfaces, and there is a problem of narrow working bandwidth; the second method is to use open-loop equivalent magnetic current and "I" type electric dipole to form a magneto-electric dipole to obtain a double-sided wide beam, and form a mutual coupling zero point through parasitic horizontal and vertical currents to keep the wide beam radiation undistorted, but there is a problem of narrow working bandwidth; the third method is to bend the two ends of the dipole downward to introduce a vertical current, and connect the horizontal current at the bottom through a horizontal line to introduce a horizontal current, thereby forming a dual-polarization wide beam radiation. At the same time, this measure generates an anti-phase current on the coupling unit to reduce the influence of coupling on the wide beam radiation, but there are problems of limited beam broadening and narrow working bandwidth. Therefore, it is necessary to propose a H The double-sided wide beam wall-mounted antenna arranged on the surface can not only realize the double-sided wide beam radiation within a wider working bandwidth, but also take into account H The decoupling of the surface pattern and the degree of beam broadening. Summary of the invention

[0004] Purpose of the invention: In view of the above-mentioned prior art, a H The double-sided wide beam wall-mounted antenna arranged on the surface realizes double-sided wide beam radiation within a wider working bandwidth and takes into account H The decoupling of the surface pattern and the degree of beam broadening.

[0005] Technical solution: One H The invention discloses a double-sided wide beam wall-mounted antenna arranged on two sides, comprising a double-peaked perforated metal plate, a printed strip layer, a half-wave dipole, a microstrip slot feeder, and a metal ground; the metal ground is arranged horizontally, and two half-wave dipoles with two arms arranged in a straight line are arranged in parallel above the metal ground, and each half-wave dipole is arranged on a dielectric substrate; each half-wave dipole is connected to the metal ground through a vertically arranged microstrip slot feeder; a signal is fed from the lower end of the microstrip slot feeder and coupled to each half-wave dipole; there are four double-peaked perforated metal plates in total, and they are fixed on the metal ground through the bottom respectively; the two ends of each half-wave dipole are respectively opposite to a double-peaked perforated metal plate; the printed strip layer comprises a dielectric substrate; The invention relates to a dielectric substrate and a metal structure printed on the upper surface of the dielectric substrate; the dielectric substrate with the printed strip layer is arranged parallel to the metal ground and has a gap between it and the half-wave oscillator; the metal structure comprises four slender folded I-shaped structures and three short and thick folded I-shaped structures; both types of folded I-shaped structures are structures in which the ends of the two ends of the horizontal segments of the I-shaped structure respectively extend a branch perpendicularly to the other horizontal segment, and the middle vertical segment of each folded I-shaped structure is arranged parallel to the direction of the two arms of the half-wave oscillator; the two ends of each half-wave oscillator are respectively opposite to a slender folded I-shaped structure, and the three short and thick folded I-shaped structures are symmetrically distributed in the center and on both sides of the two groups of slender folded I-shaped structures.

[0006] Furthermore, the distance between the two half-wave oscillators is 0.53 l 0-0.57 l 0.

[0007] Furthermore, the height of the double peak perforated metal plate is 0.23 l 0-0.27 l 0, the top distance of the double peaks is 0.07 l 0-0.11 l 0, and the diameter of the circular hole in the middle of each peak is 0.02 l 0-0.03 l 0.

[0008] Furthermore, the length of the range occupied by the slender folded I-shaped structure is 0.18 l 0-0.22 l 0, the width of the occupied range is 0.05 l 0-0.07 l 0, and the length of the branch extending unilaterally at the end of the horizontal segment is 0.05 l 0-0.07 l 0; the metal wire widths of each part of the slender folded I-shaped structure are consistent, between 0.02 l 0-0.04 l0; the length of the short and thick folded I-shaped structure is 0.26 l 0-0.28 l 0, the width of the range is 0.10 l 0-0.12 l 0, and the length of the branch extending unilaterally at the end of the horizontal segment is 0.11 l 0-0.13 l 0; the metal wire width of the middle vertical section of the short and thick folded I-shaped structure is 0.02 l 0-0.04 l 0, the line width of the horizontal segments at both ends and the extension segment is 0.01 l 0-0.02 l 0.

[0009] Furthermore, the dielectric substrate of the printed strip layer is fixed to the metal ground through nylon columns at four corners.

[0010] Beneficial effects: Existing H The working bandwidth of the wide beam antenna arranged on the surface is narrow, and there are problems such as only being able to realize a single-sided wide beam and not considering H The present invention combines a short and thick folded I-shaped structure, a double-peaked perforated metal plate and a half-wave oscillator, and uses the short and thick folded I-shaped structure to transmit low-frequency E The effect of surface wave beam broadening and low-frequency decoupling, the effect of slender folded I-shaped structure on high-frequency decoupling and E noodle H Effect of beam broadening on the surface wave, double-peaked perforated metal plate on the intermediate frequency band E Surface beam and low frequency H The widening effect of the surface wave beam and the low-frequency resonance capability can achieve a wider bandwidth H Double-sided wide beam wall-mounted antenna, which can take into account H The decoupling of the surface pattern and the degree of beam broadening.

[0011] Specifically, three short and thick folded I-shaped structures are symmetrically distributed in the center and on both sides of the slender folded I-shaped structure, which can maintain H Symmetry of the surface pattern, broadening the low frequency E The surface beam width can achieve low-frequency decoupling. The strips of the folded parts at both ends can adjust the signal strength of the coupling path and the reflection effect on the signal, and reduce the superposition effect of the structure's own radiation on the antenna radiation through the reverse current on its own structure.

[0012] The slender folded I-shaped structure is divided into two groups, each group is symmetrically arranged at both ends of the half-wave oscillator, which can generate a high-frequency reflection path to achieve H The surface is decoupled and can be superimposed with the half-wave current below to achieve high frequency E Surface andH The surface beam is broadened, and the folded parts at both ends can broaden the bandwidth corresponding to the wide beam, and the overall can affect the working frequency in the high-frequency area.

[0013] There are four double-peaked perforated metal plates divided into two groups, each group is located at the two ends of the corresponding half-wave oscillator, and the bottom is connected to the metal ground. The anti-phase currents of the two double-peaked metal plates in each group and the small-spacing in-phase currents of the same double-peaked metal plate can achieve double-sided beam broadening. The intensity of the current is determined by the distance between the double-peaked perforated metal plate and the half-wave oscillator. The middle circular hole has a regulating effect on the current length. At the same time, the double-peaked metal plate and the half-wave oscillator interact to produce a resonance point in the low-frequency region. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 For the present invention H Schematic diagram of the structure of the double-sided wide beam wall-mounted antenna arranged on a plane; Figure 2 For the antenna of the present invention | S 11 |、| S 21 |Simulation results; Figure 3 When the single unit of the antenna of the present invention is excited E Face to face H Surface simulation beam width; Figure 4 The single unit excitation of the antenna of the present invention at 3.8 GHz E noodle H Surface simulation pattern; Figure 5 The single unit excitation of the antenna of the present invention at 4.3 GHz E noodle H Surface simulation pattern; Figure 6 The single unit excitation of the antenna of the present invention at 4.8 GHz E noodle H Surface simulation pattern. DETAILED DESCRIPTION

[0015] The present invention will be further explained below in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, a H The double-sided wide beam wall-mounted antenna arranged on a plane mainly consists of a double-peak-shaped perforated metal plate 1, a printed strip layer 2, a half-wave dipole 3, a microstrip slot feeder 4, a metal ground 5 and a nylon column 6.

[0017] The metal ground 5 is horizontally arranged, and two half-wave oscillators 3 with two arms arranged in a straight line are arranged in parallel above the metal ground 5. Each half-wave oscillator 3 is arranged on a horizontally arranged dielectric substrate, and the two half-wave oscillators 3 are 0.53 l 0-0.57 l 0, l 0 is the free space wavelength corresponding to the center frequency.

[0018] Each half-wave dipole 3 is connected to the metal ground 5 through a vertically arranged microstrip slot feeder 4. Specifically, the microstrip slot feeder 4 is located directly below the corresponding half-wave dipole 3, and the metal ground 5 and the dielectric substrate where the half-wave dipole 3 are located are provided with opposite rectangular through holes, and the rectangular plugs at the upper and lower ends of the microstrip slot feeder 4 are respectively connected to the corresponding rectangular through holes to achieve conduction between the half-wave dipole 3 and the metal ground 5.

[0019] There are four double-peaked perforated metal plates 1, which are fixed on the metal ground 5 through the bottom. The two ends of each half-wave oscillator 3 are respectively facing a double-peaked perforated metal plate 1, that is, the center line of the double-peaked perforated metal plate 1 is aligned with the half-wave oscillator 3, and the two double-peaked perforated metal plates 1 facing each other are defined as a group. Among them, the height of the double-peaked perforated metal plate 1 is 0.23 l 0-0.27 l 0, the top distance of the double peaks is 0.07 l 0-0.11 l 0, and the diameter of the circular hole in the middle of each peak is 0.02 l 0-0.03 l 0.

[0020] The printed strip layer 2 includes a dielectric substrate and a metal structure printed on the upper surface of the dielectric substrate. The dielectric substrate of the printed strip layer 2 is arranged parallel to the metal ground 5 and is fixed above the half-wave oscillator 3 through nylon columns 6 at four corners, with a gap between the printed strip layer 2 and the half-wave oscillator 3.

[0021] The metal structure includes four slender folded I-shaped structures 201 and three short and thick folded I-shaped structures 202. Both types of folded I-shaped structures are structures in which the ends of the horizontal sections at both ends of the I-shaped structure respectively extend a branch perpendicularly to the other horizontal section, and the middle vertical section of each folded I-shaped structure is arranged parallel to the double-arm direction of the half-wave oscillator 3. The two ends of each half-wave oscillator 3 are respectively opposite to a slender folded I-shaped structure 201, and the two slender folded I-shaped structures 201 at the two ends of the same half-wave oscillator 3 are defined as a group. The three short and thick folded I-shaped structures 202 are symmetrically distributed in the center and on both sides of the two groups of slender folded I-shaped structures 201, that is, they are also symmetrically distributed in the center and on both sides of the two half-wave oscillators 3. In the above structure, the two groups of slender folded I-shaped structures 201 and the three short and thick folded I-shaped structures 202 are all along the antenna.H Arrange in face direction.

[0022] In the metal structure of the printed strip layer 2, the length of the range occupied by the elongated folded I-shaped structure 201 is 0.18 l 0-0.22 l 0, the width of the occupied range is 0.05 l 0-0.07 l 0, and the length of the branch extending unilaterally at the end of the horizontal segment is 0.05 l 0-0.07 l 0; the metal wire widths of each part of the slender folded I-shaped structure 201 are consistent, between 0.02 l 0-0.04 l 0. The length of the range occupied by the short and thick folded I-shaped structure 202 is 0.26 l 0-0.28 l 0, the width of the range is 0.10 l 0-0.12 l 0, and the length of the branch extending unilaterally at the end of the horizontal segment is 0.11 l 0-0.13 l 0; the metal line width of the middle vertical section of the short and thick folded I-shaped structure 202 is 0.02 l 0-0.04 l 0, the line width of the horizontal segments at both ends and the extension segment is 0.01 l 0-0.02 l 0.

[0023] For the proposed H The double-sided wide beam wall-mounted antenna is arranged on the surface. The signal is fed from the lower end of the microstrip slot feeder 4 and coupled to each half-wave dipole 3. Under the action of the double-peaked perforated metal plate 1, the slender folded I-shaped structure 201 and the short and thick folded I-shaped structure 202 and the metal ground 5, the H Double-sided wide beam wall-mounted antenna arranged on two sides.

[0024] In this process, each group of double-peaked perforated metal plates 1 generates four vertical currents, but the currents of the two opposite double-peaked perforated metal plates 1 in each group are in opposite phases to each other. The inverse current mainly broadens the intermediate frequency band of the half-wave oscillator 3. E In each double-peaked perforated metal plate 1, the small-spacing in-phase current on each peak side mainly affects the low-frequency region of the half-wave oscillator 3. H The surface wave beam has a broadening effect. The intensity of the current is determined by the distance between the double-peaked perforated metal plate 1 and the half-wave oscillator 3. The middle circular hole has a regulating effect on the current length. At the same time, the double-peaked perforated metal plate 1 and the half-wave oscillator 3 interact to produce a resonance point in the low-frequency area.

[0025] Three short and thick folded I-shaped structures 202 are used to maintain H Symmetry of the radiation pattern and widening of the antenna low frequency region E The surface wave beam width is increased, and a new coupling path between half-wave dipoles is generated at low frequencies, which corresponds to the decoupling effect in the low-frequency region. The strips of the folded parts at both ends can adjust the signal strength of the coupling path and the reflection effect on the signal, and can generate an anti-phase current on its own structure, reducing the superposition effect of the structure's own radiation on the antenna radiation, which is conducive to the simultaneous improvement of the decoupling bandwidth and decoupling level. The slender folded I-shaped structure 201 resonates in the high-frequency region, and can generate a reflection path between the half-wave dipoles at high frequencies, which corresponds to the decoupling effect in the high-frequency region. At the same time, the superposition of its current and the half-wave current obliquely below can widen the antenna in the high-frequency region. E Face to face H The folded parts at both ends can adjust the amplitude of the current while maintaining the resonant frequency, thereby obtaining a better superposition effect and thus widening the bandwidth corresponding to the high-frequency wide beam, and the elongated folded I-shaped structure 201 can affect the working frequency in the high-frequency region. Therefore, the antenna can obtain a wider working frequency band, and obtain double-sided beam widening and directional pattern decoupling within this working frequency band.

[0026] The dielectric substrate used in this embodiment is RO4003C, with a dielectric constant of 3.55 and an antenna size of 1.65. l 0×1.1 l 0× 0.41 l 0. Figure 2 This embodiment shows S Parameter simulation results. Figure 2 It can be seen that the matching frequency band of the antenna in this embodiment is 3.61-5.22 GHz, that is, the relative bandwidth is 36.5%, and the in-band coupling is below -21 dB, achieving broadband H Surface decoupling. Figure 3 The antenna of this embodiment is shown E noodle, H Simulation results of the beam width in the range of 3.61-5 GHz. E The surface beam width is between 100° and 107°. H The surface beam width is between 112° and 135°, achieving broadband dual-surface beam broadening. Figure 4 to Figure 6 is the simulated radiation pattern of the antenna of this embodiment at 3.8 GHz, 4.3 GHz, and 4.8 GHz, E The half-power beamwidths are 103°, 107°, and 103° respectively. HThe half-power beam width is 135°, 117°, and 114°, and the cross-polarization level is low. Compared with the prior art, the present invention has a wide bandwidth dual-sided wide beam radiation capability and can take into account H The decoupling of the surface pattern and the degree of beam broadening.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-sided wide beam wall-mounted antenna arranged in an H plane, characterized in that: It comprises a double-peaked perforated metal plate (1), a printed strip layer (2), a half-wave oscillator (3), a microstrip slot feeder (4), and a metal ground (5); The metal ground (5) is arranged horizontally, and two half-wave oscillators (3) with two arms arranged in a straight line are arranged in parallel above the metal ground (5), and each half-wave oscillator (3) is arranged on a dielectric substrate; Each half-wave oscillator (3) is connected to a metal ground (5) via a vertically arranged microstrip slot feeder (4); a signal is fed from the lower end of the microstrip slot feeder (4) and coupled to each half-wave oscillator (3); There are four double-peaked perforated metal plates (1) in total, which are fixed to the metal ground (5) through their bottoms respectively; two ends of each half-wave oscillator (3) are respectively facing a double-peaked perforated metal plate (1); The printed strip layer (2) comprises a dielectric substrate and a metal structure printed on the upper surface of the dielectric substrate; the dielectric substrate of the printed strip layer (2) is arranged in parallel with the metal ground (5) and a gap is left between the dielectric substrate and the half-wave oscillator (3); the metal structure comprises four slender folded I-shaped structures (201) and three short and thick folded I-shaped structures (202); both types of folded I-shaped structures are structures in which the ends of the two ends of the horizontal segments of the I-shaped structure respectively extend a branch perpendicularly to the other horizontal segment, and the middle vertical segment of each folded I-shaped structure is arranged in parallel with the direction of the two arms of the half-wave oscillator (3); the two ends of each half-wave oscillator (3) are respectively opposite to a slender folded I-shaped structure (201), and the three short and thick folded I-shaped structures (202) are symmetrically distributed in the center and on both sides of the two groups of slender folded I-shaped structures (201).

2. The H-plane-arranged double-sided wide-beam wall-mounted antenna according to claim 1, characterized in that: The two half-wave oscillators (3) are 0.53 λ 0-0.57 λ 0.

3. According to claim 2 H The double-sided wide beam wall-mounted antenna is arranged on two sides, characterized in that: The height of the double peak perforated metal plate (1) is 0.23 λ 0-0.27 λ 0, the top distance of the double peaks is 0.07 λ 0-0.11 λ 0, and the diameter of the circular hole in the middle of each peak is 0.02 λ 0-0.03 λ 0.

4. According to claim 3 Place The H-plane arranged double-sided wide beam wall-mounted antenna is characterized in that: The length of the range occupied by the slender folded I-shaped structure (201) is 0.18 λ 0-0.22 λ 0, the width of the range is 0.05 λ 0-0.07 λ 0, and the length of the branch extending unilaterally at the end of the horizontal segment is 0.05 λ 0-0.07 λ 0; the metal wire widths of each part of the slender folded I-shaped structure (201) are consistent, between 0.02 λ 0-0.04 λ 0; the length of the short and thick folded I-shaped structure (202) is 0.26 λ 0-0.28 λ 0, the width of the range is 0.10 λ 0-0.12 λ 0, and the length of the branch extending unilaterally at the end of the horizontal segment is 0.11 λ 0-0.13 λ 0; the metal line width of the middle vertical section of the short and thick folded I-shaped structure (202) is 0.02 λ 0-0.04 λ 0, the line width of the horizontal segments at both ends and the extension segment is 0.01 λ 0-0.02 λ 0.

5. The H-plane-arranged double-sided wide-beam wall-mounted antenna according to any one of claims 1 to 4, characterized in that: The dielectric substrate of the printed strip layer (2) is fixed to the metal ground (5) via nylon columns (6) at four corners.

Images