A dual-function antenna based on magneto-electric dipole structure multiplexing

Abstract

This invention discloses a dual-function antenna based on a magnetoelectric dipole structure multiplexing, specifically relating to the field of communication technology. It solves the technical problem that existing antennas typically require two or more antennas to support two communication modes, resulting in an excessively large system footprint, which does not meet the urgent pursuit of miniaturization and thinness in terminal antennas. The technical solution involves a three-port MIMO antenna with a 5.8GHz Wi-Fi band, one of which can achieve broadband operation, simultaneously covering both the 5G cellular mobile communication N79 band and the 5.8GHz Wi-Fi band. This invention can simultaneously support 5G cellular network communication and Wi-Fi communication.

Description

Technical Field

[0001] This invention relates to the field of microwave communication technology, and more specifically to a dual-function antenna based on the multiplexing of a magnetoelectric dipole structure. Background Technology

[0002] The earliest MIMO antennas were implemented by arranging two or more radiating elements at a certain spacing. However, this method generally requires the introduction of decoupling techniques, such as neutral lines, defective ground structures, parasitic elements, and decoupling feed networks, which inevitably leads to a relatively large antenna footprint. In addition, because this method has multiple radiating elements and additional decoupling elements, its application scenarios are also somewhat limited.

[0003] Subsequent research proposed MIMO antennas based on a shared radiating surface. These antennas can integrate multiple ports on a single radiating element to reduce the number of radiating elements, resulting in a relatively small antenna size. Some studies achieve MIMO functionality by exciting different parts of the same radiator and improve port isolation through slotting and introducing short-circuit vias. Some two-port MIMO antennas are designed using mode cancellation, which involves analyzing the common-mode and differential-mode impedances of different ports to achieve better isolation between them. Polarization diversity and pattern diversity are also commonly used methods in the design of shared-radiating-surface MIMO antennas. Polarization diversity refers to exciting different ports to achieve mutually orthogonal polarization directions, causing a single radiating element to exhibit different polarization patterns, thus achieving MIMO functionality. Pattern diversity refers to achieving different maximum radiation directions for different ports when excited, thus achieving port isolation.

[0004] While the aforementioned antennas achieve MIMO functionality based on shared radiating elements, some still have relatively high profiles, and most are two-port MIMO antennas. Although some are designed to excite the same radiating element with three or more ports to achieve MIMO functionality, these antennas mostly only involve MIMO functionality in a single frequency band. Furthermore, since 5G cellular network communication and Wi-Fi communication are two different communication systems, traditional design approaches typically require two or more antennas to support both. This would result in an excessively large system footprint, failing to meet the urgent need for miniaturization and thinness in terminal antennas. Summary of the Invention

[0005] Therefore, this invention solves the technical problem that in the prior art, antennas usually need to use two or more antennas to support two communication modes, resulting in an excessively large system footprint, which does not meet the urgent pursuit of miniaturization and thinness of terminal antennas. This invention provides a dual-function antenna based on magnetoelectric dipole structure multiplexing. Based on magnetoelectric dipole structure multiplexing technology, it realizes an antenna that can simultaneously support two communication modes: 5G cellular network communication and WIFI communication. It realizes a three-port MIMO antenna in the 5.8GHz WIFI band, one of which can realize broadband operation, and can simultaneously cover the 5G cellular mobile communication N79 band and the 5.8GHz WIFI band.

[0006] This invention provides a dual-function antenna based on a magnetoelectric dipole structure multiplexing, comprising a feed substrate, a metal ground, a dielectric substrate, and a microstrip patch structure arranged sequentially from bottom to top; the microstrip patch structure has slots. Two feed probes are disposed below the feed substrate; the two feed probes pass upward through the feed substrate, the metal ground, and the dielectric substrate. A microstrip line feed structure is disposed on the lower surface of the feed substrate. The microstrip feed structure constitutes port #1, and the two metal probes constitute port #2 and port #3. The slots etched on the microstrip patch structure are used to improve the isolation between port #1 and ports #2 and #3.

[0007] Furthermore, rectangular slots are provided on the metal ground.

[0008] Furthermore, a metallization groove is provided on the dielectric substrate.

[0009] Furthermore, the microstrip patch structure located above the dielectric substrate constitutes an electric dipole.

[0010] Furthermore, the metallized grooves located on the dielectric substrate serve as the conductive walls of the magnetoelectric dipole antenna, and they work together with the gaps on the patch structure as magnetic dipoles.

[0011] Furthermore, the rectangular slot is used for feeding the magnetoelectric dipole.

[0012] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0013] 1. This invention is based on the magnetoelectric dipole structure multiplexing technology. By cleverly reusing the magnetoelectric dipole antenna structure, a three-port MIMO antenna for the 5.8GHz WIFI band is realized. One of the ports can achieve broadband operation that simultaneously covers the 5G N79 band and the 5.8GHz WIFI band. This antenna can simultaneously support 5G cellular network communication and WIFI communication.

[0014] 2. This invention enables two functions: a magnetoelectric dipole broadband antenna operating in the 5G N79 band and a three-port MIMO antenna for the 5.8GHz Wi-Fi band based on a shared radiator. The three-port MIMO antenna exhibits pattern diversity characteristics, allowing for flexible switching between dual-beam forward and backward radiation patterns and a single-beam apical radiation pattern by flexibly exciting different ports. Simultaneously, the antenna design boasts high integration, significantly reducing its size and meeting the diverse needs of future mobile communication antennas.

[0015] 3. This invention can simultaneously support two different communication systems: 5G cellular network communication and WIFI communication. A three-port MIMO antenna with a shared radiator is implemented for WIFI (5.8GHz band), where one port can simultaneously achieve broadband operation covering both the 5G N79 band and the 5.8GHz WIFI band. Simultaneously, as a 3MIMO antenna, different radiation modes can be obtained by exciting different radiating structures, achieving both dual-beam forward and backward radiation patterns and single-beam top radiation pattern antennas, while maintaining good isolation between the ports. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the antenna of the present invention;

[0018] Figure 2 The simulation results of the reflection coefficient and gain of the magnetoelectric dipole antenna in the 5GHz band are shown in the figure.

[0019] Figure 3a The antenna radiation pattern of the magnetoelectric dipole antenna of the present invention at 4.92 GHz is shown.

[0020] Figure 3b The antenna radiation pattern of the magnetoelectric dipole antenna of the present invention at 5.4 GHz;

[0021] Figure 3c The antenna radiation pattern of the magnetoelectric dipole antenna of the present invention at 5.8 GHz;

[0022] Figure 4 The S-parameter diagram of the WIFI (5.8GHz band) 3MIMO antenna of this invention is shown.

[0023] Figure 5The correlation coefficient diagram of the 3MIMO antenna in WIFI (5.8GHz band) according to the present invention is shown.

[0024] Figure 6a This invention presents a 3D radiation pattern at the top of a WIFI (5.8GHz band) 3MIMO antenna.

[0025] Figure 6b This invention presents a 3D radiation pattern of a dual-beam antenna in a 3MIMO WIFI (5.8GHz band) antenna.

[0026] Figure 7 This is the radiation pattern of the 3MIMO antenna port 1 in the WIFI (5.8GHz band) according to the present invention;

[0027] Figure 8 This is the radiation pattern of the 3MIMO antenna port 2 in the WIFI (5.8GHz band) according to the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Microstrip patch structure; 2. Gap; 3. Metallization trench; 4. Dielectric substrate; 5. Metal ground; 6. Rectangular gap; 7. Feeding substrate; 8. Microstrip line feeding structure; 9. Feeding probe. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] This embodiment provides a dual-function antenna based on the multiplexing of a magnetoelectric dipole structure, such as... Figure 1 As shown, it mainly includes: a dielectric substrate 4, a metal ground plane 5, a feed substrate 7, a microstrip line feed structure 8, a feed probe 9, a microstrip patch structure 1 located above the dielectric substrate 4 forming an electric dipole, and a metallized groove 3 located on the dielectric substrate 4 serving as a conductive wall for the magnetoelectric dipole antenna, which works together with the slots on the patch structure as a magnetic dipole. The microstrip patch structure 1 has slots 2 etched on it to improve the isolation between port #1 and ports #2 and #3; a rectangular slot 6 is provided on the metal ground plane 5 for feeding the magnetoelectric dipole.

[0032] When the antenna operates independently as a magnetoelectric dipole, the signal is fed in from the feed port #1 and excited by the rectangular slot 6 structure to achieve broadband operation and cover the N79 frequency band of 5G cellular mobile communication antenna.

[0033] When the antenna operates as a three-port MIMO antenna, it achieves a MIMO antenna with pattern diversity characteristics in the 5.8GHz Wi-Fi band: When a signal is fed into port #2 or #3 of the antenna, the signal excites the PIFA antenna through the feed probe 9, covering the 5.8GHz Wi-Fi band and achieving a dual-beam radiation pattern; when a signal is fed into port #1 of the antenna, the signal excites the magnetoelectric dipole antenna through the microstrip line feed structure 8, simultaneously covering both the 5G N79 band and the 5.8GHz Wi-Fi band, achieving a single-beam top radiation pattern. A slot 2 is provided on the microstrip patch structure 1 to improve the isolation between the magnetoelectric dipole antenna and the PIFA antenna. Furthermore, because the PIFA antenna uses a higher-order mode, there is good isolation between port #2 and port #3.

[0034] In this embodiment, the dielectric substrate 4 has a dielectric constant of 3.55, a loss angle of 0.0027, and a thickness of 3.248 mm. The power supply substrate 7 has a dielectric constant of 3.55, a loss angle of 0.0027, and a thickness of 0.305 mm.

[0035] The overall cross-sectional height is 3.553 mm (~ 0.059λ 0 @5 GHz), planar dimensions 55mm × 50mm (~0.92 × 0.92λ0) 2 @5GHz).

[0036] When the antenna operates independently as a magnetoelectric dipole, its transmission response is as follows: Figure 2 As shown, the bandwidth ranges from 4.72 to 6.01 GHz, covering the 5GN79 frequency band, with a gain of 5.2 to 7.12 dBi within the band. Figure 3 shows the antenna radiation patterns of the magnetoelectric dipole antenna at 4.92 GHz, 5.4 GHz, and 5.8 GHz.

[0037] Figure 4 This is the S-parameter diagram of a 3MIMO antenna for Wi-Fi (5.8GHz band). Port #1 provides broadband coverage, spanning the 4.72-6.01GHz band, while ports #2 and #3 cover the 5.56-6.01GHz band. The in-band isolation between ports #1 and #2 is greater than 15dB, and the in-band isolation between ports #2 and #3 is greater than 20dB. The correlation coefficient of the proposed 3MIMO antenna is shown below. Figure 5 As shown, the correlation coefficient of the antenna is much less than 0.02, meeting the design requirements of a MIMO antenna. Figure 6 is a schematic diagram of the radiation pattern diversity performance of the 3MIMO antenna at 5.78 GHz. Figure 7 The radiation patterns at three frequency points on the 3MIMO antenna port #1 are shown: 5.64 GHz, 5.78 GHz, and 5.9 GHz, respectively, exhibiting good top radiation. Figure 8The radiation patterns at three frequency points on port #2 of the 3MIMO antenna are shown, namely 5.64GHz, 5.78GHz, and 5.9GHz. The dual-beam radiation pattern of the antenna is stable and good within the frequency band.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dual-function antenna based on magnetoelectric dipole structure multiplexing, characterized in that, Including setting from bottom to top The feed substrate (7), metal ground (5), dielectric substrate (4), and microstrip patch structure (1) are provided; the microstrip patch structure (1) is provided with A gap is provided (2); Two feed probes (9) are disposed below the feed substrate (7); the two feed probes (9) pass through the feed substrate (7), the metal ground (5) and the dielectric substrate (4) in sequence; A microstrip line feeding structure (8) is provided on the lower surface of the feeding substrate (7); A rectangular slot (6) is provided on the metal ground (5); Two sets of metallization grooves (3) are provided on the dielectric substrate (4).

2. The dual-functional antenna based on magnetoelectric dipole structure multiplexing according to claim 1, characterized in that, The microstrip patch structure (1) located above the dielectric substrate (4) constitutes an electric dipole.

3. The dual-functional antenna based on magnetoelectric dipole structure multiplexing according to claim 2, characterized in that, The metallized groove (3) located on the dielectric substrate (4) serves as the conductive wall of the magnetoelectric dipole antenna, and the gap between it and the patch structure (1) works together as a magnetic dipole.

4. The dual-functional antenna based on magnetoelectric dipole structure multiplexing according to claim 3, characterized in that, The rectangular slot (6) is used for feeding the magnetoelectric dipole.

5. The dual-functional antenna based on magnetoelectric dipole structure multiplexing according to claim 4, characterized in that, The dielectric substrate (4) has a dielectric constant of 3.55, a loss angle of 0.0027, and a thickness of 3.248 mm.

6. The dual-functional antenna based on magnetoelectric dipole structure multiplexing according to claim 5, characterized in that, The dielectric constant of the feed substrate (7) is 3.55, the loss angle is 0.0027, and the thickness is 0.305 mm.

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