A double-faced wide-beam wall-mounted antenna arranged in an H plane

Abstract

The application discloses a double-face wide-beam wall-hanging antenna arranged in H plane, which comprises a double-peak-shaped perforated metal plate, a printed strip layer, a half-wave dipole, a microstrip trans-slot feeder and a metal ground. H The short and thick type and the slender type folded I-shaped structure, the double-peak-shaped perforated metal plate and the half-wave dipole arranged in H plane are combined E The short and thick type folded I-shaped structure has the effects of low-frequency decoupling and wide-beam expansion of the H plane, the slender type folded I-shaped structure has the effects of high-frequency decoupling and wide-beam expansion of the H plane, E The double-peak-shaped perforated metal plate has the effects of middle-frequency band beam expansion of the H plane and low-frequency resonance ability, H The double-peak-shaped perforated metal plate has the effects of middle-frequency band beam expansion of the H plane and low-frequency resonance ability, E The double-peak-shaped perforated metal plate has the effects of middle-frequency band beam expansion of the H plane and low-frequency resonance ability, H The double-peak-shaped perforated metal plate has the effects of middle-frequency band beam expansion of the H plane and low-frequency resonance ability, H The double-peak-shaped perforated metal plate has the effects of middle-frequency band beam expansion of the H plane and low-frequency resonance ability, H The double-peak-shaped perforated metal plate has the effects of middle-frequency band beam expansion of the H plane and low-frequency resonance ability,

Description

TECHNICAL FIELD

[0001] The present application relates to a microwave communication device, in particular to a wide-beam wall-mounted antenna. BACKGROUND

[0002] The wall-mounted antenna is mainly used for indoor distributed antenna coverage system, has a wide working bandwidth, and supports multiple communication systems such as 3G, 4G, 5G, GSM, CDMA, etc. The half-power beam width is an important indicator of the wall-mounted antenna, and the wide beam width is conducive to improving the indoor wireless signal coverage range, and the double-sided wide-beam wall-mounted antenna can further improve the signal coverage in the overall indoor space, thereby providing better signal connection for intelligent devices in various places indoors. H The polarization direction of the surface array wall-mounted antenna is perpendicular to the array direction, H The pattern distortion of the surface must be solved at the same time, H The pattern decoupling of the surface must be solved at the same time, and the beam widening method must meet H The surface array condition. Therefore, it is necessary to propose H A solution to the double-sided wide-beam wall-mounted antenna with surface array.

[0003] At present H There are mainly three kinds of implementation methods for the wide-beam antenna with surface array: the first kind controls the amplitudes of the I-shaped strip currents on both sides of the patch antenna polarization direction to realize the widening of the patch antenna E Surface beam, but fails to realize H Surface beam widening, and does not consider H The pattern decoupling of the surface, and has a narrow working bandwidth; the second kind is to obtain double-sided wide-beam by using open-loop equivalent magnetic current and "I" type electric dipole to form magnetic-electric dipole, and to form mutual coupling zero points by parasitic horizontal and vertical currents to keep wide-beam radiation without distortion, but has a narrow working bandwidth; the third kind is to introduce vertical current by bending the ends of the dipole downward, and to introduce horizontal current by connecting the bottom through horizontal line, thereby forming double-polarized wide-beam radiation, and the counter-phase current generated on the coupling unit reduces the influence of coupling on wide-beam radiation, but has a limited beam widening and a narrow working bandwidth. Therefore, it is necessary to propose a H Double-sided wide-beam wall-mounted antenna with surface array, which can not only realize double-sided wide-beam radiation in a wide working bandwidth, but also take into account H The pattern decoupling of the surface and the beam widening degree. SUMMARY

[0004] Invention purpose: in view of the above prior art, a H Double-sided wide-beam wall-mounted antenna with surface array is proposed, which realizes double-sided wide-beam radiation in a wide working bandwidth, and takes into account H The pattern decoupling of the surface and the beam widening degree.

[0005] Technical solution: a H The double-face wide-beam wall-hanging antenna with face arrangement comprises double-peak-shaped perforated metal plates, printed strip layers, half-wave dipoles, microstrip trans-slot feeders and a metal ground. The metal ground is horizontally arranged, two half-wave dipoles with linearly arranged arms 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 with the metal ground through a vertically arranged microstrip trans-slot feeder. Signals are fed from the lower end of the microstrip trans-slot feeder and coupled to each half-wave dipole. The double-peak-shaped perforated metal plates are four in total and are fixed on the metal ground through the bottom respectively. The two ends of each half-wave dipole respectively face one double-peak-shaped perforated metal plate. The printed strip layer 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 is arranged in parallel with the metal ground and has a gap with the half-wave dipoles. The metal structure comprises four elongated 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 horizontal sections of the I-shaped structures respectively vertically extend a branch to the other horizontal section. The middle vertical sections of the folded I-shaped structures are arranged in parallel with the directions of the arms of the half-wave dipoles. The two ends of each half-wave dipole respectively face one elongated 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 elongated folded I-shaped structures.

[0006] Further, the distance between the two half-wave dipoles is 0.53 λ 0-0.57 λ 0.

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

[0008] Further, the length corresponding to the range occupied by the elongated folded I-shaped structure is between 0.18 λ 0-0.22 λ 0, the width corresponding to the range occupied is between 0.05 λ 0-0.07 λ 0, and the length of the branch extending from the end of the horizontal section on one side is between 0.05 λ 0-0.07 λ 0. The widths of the metal wires of the elongated folded I-shaped structure are uniform and are between 0.02 λ 0-0.04 λ0; the length of the short thick folded I-shaped structure is 0.26 λ 0-0.28 λ 0; the length of the short thick folded I-shaped structure is 0.26 λ 0-0.12 λ 0; the length of the short thick folded I-shaped structure is 0.26 λ 0-0.13 λ 0; the length of the short thick folded I-shaped structure is 0.26 λ 0-0.04 λ 0; the length of the short thick folded I-shaped structure is 0.26 λ 0-0.02 λ 0; the length of the short thick folded I-shaped structure is 0.26

[0009] Further, the medium substrate of the printed strip layer is fixed with the metal ground through the nylon columns at four corners.

[0010] Beneficial effects: the existing H The working bandwidth of the surface array wide beam antenna is narrow, and there are problems of only realizing single-surface wide beam, not considering H the decoupling or beam widening of the surface pattern. The short thick and long thin folded I-shaped structures, the double-peak shaped hole metal plate and the half-wave dipole are combined in the application, the short thick folded I-shaped structure is used for the low-frequency E surface beam widening and low-frequency decoupling, the long thin folded I-shaped structure is used for high-frequency decoupling and E surface H surface beam widening, the double-peak shaped hole metal plate is used for the middle-frequency E surface beam and low-frequency H surface beam widening and low-frequency resonance, so that the surface array double-surface wide beam wall hanging antenna with a wider bandwidth is realized, and the decoupling and beam widening degrees of the surface pattern are considered. H H

[0011] Specifically, the three short thick folded I-shaped structures are symmetrically distributed on the center and both sides of the long thin folded I-shaped structure, so that the symmetry of the surface pattern is maintained, the low-frequency H surface beam width is widened, the low-frequency decoupling is realized, the signal strength of the coupling path can be adjusted by the strip at both ends of the folded part, and the reflection effect of the signal is reduced by the opposite current on the structure itself, so that the superposition effect of the structure itself radiation on the antenna radiation is reduced. E

[0012] The long thin folded I-shaped structure is divided into two groups, and each group is symmetrically arranged at both ends of the half-wave dipole, so that the high-frequency reflection path is generated to realize H surface decoupling, and the high-frequency E surface and​​​H 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 operating frequency in the high-frequency area.

[0013] Four double-peaked perforated metal plates are arranged in two groups, each located at either end of a corresponding half-wave oscillator, with their bases connected to the metal ground. The anti-phase currents flowing through the two double-peaked plates in each group, along with the closely spaced in-phase currents flowing through the same double-peaked plate, enable two-sided beam broadening. The current intensity is determined by the distance between the double-peaked perforated metal plate and the half-wave oscillator, with the central circular hole regulating the current length. Simultaneously, the double-peaked metal plate and the half-wave oscillator interact to create 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;

[0015] Figure 2 For the antenna of the present invention | S 11 |、| S 21 |Simulation results;

[0016] Figure 3 When the single unit of the antenna of the present invention is excited E Face to face H Surface simulation beamwidth;

[0017] Figure 4 The single unit excitation of the antenna of the present invention at 3.8 GHz E noodle H Surface simulation pattern;

[0018] Figure 5 The single unit excitation of the antenna of the present invention at 4.3 GHz E noodle H Surface simulation pattern;

[0019] 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

[0020] The present invention will be further explained below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, a H The double-sided wide beam wall-mounted antenna arranged on a plane mainly consists of a double-peaked 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.

[0022] Wherein, the metal ground 5 is horizontally arranged, and two half-wave dipoles 3 with two arms arranged in a straight line are arranged in parallel above the metal ground 5. Each half-wave dipole 3 is arranged on a horizontally arranged dielectric substrate, and the two half-wave dipoles 3 are spaced apart by 0.53 λ 0-0.57 λ 0, λ 0 is the free space wavelength corresponding to the center frequency.

[0023] Each half-wave dipole 3 is connected with the metal ground 5 through a vertically arranged microstrip slot feed 4. Specifically, the microstrip slot feed 4 is located directly below the corresponding half-wave dipole 3, the metal ground 5 and the dielectric substrate on which the half-wave dipole 3 is located are provided with opposite rectangular through holes, and the rectangular pins at the upper and lower ends of the microstrip slot feed 4 are connected with the corresponding rectangular through holes, thereby realizing the conduction between the half-wave dipole 3 and the metal ground 5.

[0024] There are four double-peak hole metal plates 1, and the double-peak hole metal plates 1 are fixed on the metal ground 5 through the bottom. The two ends of each half-wave dipole 3 are respectively opposite to one double-peak hole metal plate 1, that is, the center line of the double-peak hole metal plate 1 is aligned with the half-wave dipole 3, and the two double-peak hole metal plates 1 facing each other are defined as a group. Among them, the height of the double-peak hole metal plate 1 is between 0.23 λ 0-0.27 λ 0, the distance between the top ends of the double peaks is between 0.07 λ 0-0.11 λ 0, the diameter of the circular hole located in the middle of each peak is between 0.02 λ 0-0.03 λ 0.

[0025] 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 in parallel with the metal ground 5 and is fixed above the half-wave dipole 3 through the four nylon columns 6, and a gap is left between the printed strip layer 2 and the half-wave dipole 3.

[0026] The metal structure includes four elongated folded I-shaped structures 201 and three short thick folded I-shaped structures 202. The two types of folded I-shaped structures are structures in which the ends of the horizontal sections of the I-shaped structures extend perpendicularly to the other horizontal section. The middle vertical sections of the folded I-shaped structures are arranged in parallel to the direction of the arms of the half-wave dipoles 3. The two ends of each half-wave dipole 3 face an elongated folded I-shaped structure 201, and the two elongated folded I-shaped structures 201 defining the two ends of a half-wave dipole 3 are a group. The three short thick folded I-shaped structures 202 are symmetrically distributed in the center and on both sides of the two groups of elongated folded I-shaped structures 201, i.e., symmetrically distributed in the center and on both sides of the two half-wave dipoles 3. In the above structure, the two groups of elongated folded I-shaped structures 201 and the three short thick folded I-shaped structures 202 are arranged along the surface direction of the antenna. H

[0027] 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 between 0.18 λ 0 and 0.22 λ 0, the width of the range occupied is between 0.05 λ 0 and 0.07 λ 0, the length of the branch extending from one side of the end of the horizontal section is between 0.05 λ 0 and 0.07 λ 0, and the width of the metal wire of each part of the elongated folded I-shaped structure 201 is uniform, between 0.02 λ 0 and 0.04 λ 0. The length of the range occupied by the short thick folded I-shaped structure 202 is between 0.26 λ 0 and 0.28 λ 0, the width of the range occupied is between 0.10 λ 0 and 0.12 λ 0, the length of the branch extending from one side of the end of the horizontal section is between 0.11 λ 0 and 0.13 λ 0, the width of the metal wire of the middle vertical section of the short thick folded I-shaped structure 202 is between 0.02 λ 0 and 0.04 λ 0, and the width of the wire of the two horizontal sections and the extending section is between 0.01 λ 0 and 0.02 λ 0.

[0028] For the proposed H surface-arranged double-sided wide-beam wall-mounted antenna, signals are fed from the lower end of the microstrip trans-slot feed 4, coupled to each half-wave dipole 3, and realized H ​Double-sided wide beam wall-mounted antenna arranged on two sides.

[0029] In this process, each set 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 set are in anti-phase with each other. The anti-phase currents mainly broaden 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.

[0030] Three short and thick folding I-shaped structures 202 are used to maintain H Symmetry of the radiation pattern and widening of the antenna low-frequency region E The slender folded I-shaped structure 201 resonates in the high-frequency region and can generate a reflection path between the half-wave oscillators at high frequencies, which corresponds to the decoupling effect in the high-frequency region. At the same time, 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 oscillators 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 portions at both ends can adjust the current amplitude while maintaining the resonant frequency, achieving a better superposition effect and thus widening the bandwidth corresponding to the high-frequency wide beam. Furthermore, the elongated folded I-shaped structure 201 can affect the operating frequency in the high-frequency region. As a result, the antenna can achieve a wider operating frequency band, and achieve dual-beam broadening and pattern decoupling within this operating band.

[0031] The dielectric substrate used in this embodiment is RO4003C, with a dielectric constant of 3.55 and an antenna size of 1.65. λ 0×1.1 λ 0× 0.41 λ 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 The surface beam width simulation result is 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°, and wide-band double-surface beam widening is achieved. Figures 4 to 6 The simulation patterns of the antenna of the embodiment at 3.8 GHz, 4.3 GHz and 4.8 GHz are as follows, E The surface half-power beam widths are 103°, 107° and 103° respectively, H The surface half-power beam widths are 135°, 117° and 114° respectively, and the cross-polarization levels are all low. Compared with the prior art, the application has the ability of wide-band double-surface wide-beam radiation, and can take into account H Surface pattern decoupling and beam widening.

[0032] The above only describes the preferred embodiments of the application, and it should be noted that, for those skilled in the art, several improvements and refinements can be made without departing from the principles of the application, and these improvements and refinements should also be considered within the protection scope of the application.

Claims

1. A H The double-sided wide beam wall-mounted antenna arranged on two sides is characterized by: It includes 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 the metal ground (5) through 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, and they are fixed on the metal ground (5) through the bottom respectively; the two ends of each half-wave oscillator (3) are respectively facing a double-peaked perforated metal plate (1); 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 a gap is left between the dielectric substrate and the half-wave oscillator (3); 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 segments at both ends of the I-shaped structure 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 (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. according to claim 1 H The double-sided wide beam wall-mounted antenna arranged on two sides is characterized by: The two half-wave oscillators (3) are 0.53 λ 0-0.57 λ 0, λ 0 is the free space wavelength corresponding to the center frequency.

3. according to claim 2 H The double-sided wide beam wall-mounted antenna arranged on two sides is characterized by: The height of the double peak perforated metal plate (1) is 0.23 λ 0-0.27 λ 0, the top distance between the two peaks is 0.07 λ 0-0.11 λ 0, 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 H The double-sided wide beam wall-mounted antenna arranged on two sides is characterized by: 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, 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 range of the short and thick folded I-shaped structure (202) corresponds to a length of 0.26 λ 0-0.28 λ 0, the width of the range is 0.10 λ 0-0.12 λ 0, 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 are both 0.01 λ 0-0.02 λ 0.

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

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