Miniaturized broadband antenna applied to 5G mobile communication

Abstract

The invention discloses a miniaturized broadband antenna applied to 5G mobile communication. The miniaturized broadband antenna comprises a dielectric substrate, a radiation patch and a grounding plate, the radiation patch and the grounding plate are arranged on the same surface of the dielectric substrate at an interval up and down; the radiation patch and the grounding plate are connected through a feeding point to form a broadband antenna, and the radiation patch and the grounding plate which are located on one side of the feeding point are partially connected through a coil, so that impedance matching is adjusted, and the low-frequency bandwidth is increased. The radiation patch and the grounding plate are connected through the coil to match impedance, so that the low-frequency bandwidth is increased, and the bandwidth of the antenna is expanded; corresponding rectangular grooves, triangular grooves and trapezoidal grooves are formed in different positions of the radiation patch to realize adjustability of frequency and bandwidth and broadband; and meanwhile, a corresponding rectangular groove is formed in the butt joint floor, so that impedance matching is better realized. The antenna is wide in coverage frequency band, good in performance and small in size, meets different application conditions and is not affected by the background environment.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular to a miniaturized broadband antenna used in 5G mobile communications. Background Art

[0002] From the analog cellular system in the 1980s to the current 4G system, wireless communication technology has undergone tremendous development and changes. At present, 4G communication technology has been commercialized on a large scale, and the data transmission rate has been greatly improved. However, with the rapid rise of emerging technologies such as the Internet of Things and the Internet of Vehicles, people have put forward higher requirements for wireless communication systems. 4G communication technology can no longer meet people's needs for high speed and low latency. Therefore, 5G has become the focus of attention in the current mobile communication industry. With the continuous growth of demand for broadband wireless services, there is a serious shortage of existing spectrum resources. Therefore, the application frequency band of 5G will not only focus on low frequency bands, but also use high-frequency millimeter wave bands. At the same time, with the continuous advancement of micro integrated circuit (MIC) technology and very large scale integrated circuit (VLSIC) technology, as well as the application of various new materials and new processes, the size of communication electronic equipment is becoming increasingly miniaturized, requiring its information processing capabilities to develop towards more intelligent and broadband. The system has higher and higher requirements for antenna design, so modern antennas need to adapt to miniaturization development while also meeting various performance indicators, including bandwidth and efficiency. Generally speaking, the smaller the size of the antenna, the inverse relationship between the efficiency and bandwidth performance of the antenna, so we need to try to find a compromise between size, bandwidth and efficiency. Since the physical limit of antenna miniaturization has not yet been achieved, it is effective to take measures in the selection of antenna shape and structure, feeding method, and the use of materials other than conductors. Summary of the invention

[0003] The object of the present invention is to provide a miniaturized broadband antenna for 5G mobile communications, covering the 1.2-6 GHz frequency band, having good performance and compact size, meeting different application scenarios, and not being affected by the background environment.

[0004] The technical solution adopted by the present invention is: A miniaturized broadband antenna for 5G mobile communications comprises a dielectric substrate, a radiation patch and a ground plate; the radiation patch and the ground plate are arranged on the same surface of the dielectric substrate with an upper and lower interval; the radiation patch and the ground plate are connected through a feeding point to form a broadband antenna, and the radiation patch and the ground plate part located on one side of the feeding point are connected through a coil to adjust the impedance matching to increase the low-frequency bandwidth.

[0005] Furthermore, the radiation patch and the ground plate are arranged on the upper surface or the lower surface of the dielectric substrate.

[0006] Furthermore, the radiation patch is provided with a plurality of adjustment slots for adjusting the frequency and bandwidth.

[0007] Furthermore, two rectangular grooves of the same size are symmetrically arranged on the left and right sides of the radiation patch.

[0008] Furthermore, the rectangular groove extends out of the corresponding side edges to form an opening.

[0009] Furthermore, the outer contour of the lower end of the radiation patch corresponding to the gap satisfies that the size of the gap between the radiation patch and the ground plane gradually increases from the feeding point to both sides.

[0010] Furthermore, two triangular grooves of the same size are provided on both sides of the upper end of the ground plate corresponding to the gap, so as to achieve antenna impedance matching and wide impedance bandwidth, thereby expanding the bandwidth of the antenna.

[0011] Furthermore, the feeding point is arranged at a middle position of the gap between the radiation patch and the ground plane.

[0012] Furthermore, the feeding point is electrically connected to a feeding transmission line.

[0013] Furthermore, the dielectric substrate is an RF4 dielectric substrate; the radiation patch and the ground plate are formed of copper, aluminum, silver or gold materials.

[0014] The present invention adopts the above technical solution, which has the following beneficial effects compared with the prior art: 1. The radiation patch of the present invention is connected to the ground plate through a coil to adjust the impedance matching, increase the low-frequency bandwidth, and thus expand the bandwidth of the antenna; corresponding rectangular slots, triangular slots and trapezoidal slots are opened at different positions of the radiation patch to achieve the adjustability and wide bandwidth of frequency and bandwidth; at the same time, corresponding rectangular slots are opened on the ground plate to better achieve impedance matching.

[0015] 2. The antenna of the present invention has good performance and compact size, can meet different application conditions, and is not affected by the background environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments; Figure 1 This is a structural schematic diagram of a miniaturized broadband antenna applied to 5G mobile communications of the present invention; Figure 2 Schematic diagram of the structure of the upper surface of the dielectric substrate in an embodiment of the present invention; Figure 3 VSWR measurement result diagram of the antenna in the embodiment of the present invention; Figure 4 is the XOY radiation pattern of the antenna at Freq=2 GHz in an embodiment of the present invention; Figure 5: is the XOY radiation pattern of the antenna at Freq=3.5 GHz in the embodiment of the present invention.

[0017] Figure numerals: 1 - dielectric substrate, 2 - radiation patch, 3 - ground plate, 4 - rectangular slot, 5 - coil, 6 - triangular slot, 7 - feeding point. Implementation

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0019] like Figures 1 to 5 As shown in one of the figures, the present invention discloses a miniaturized broadband antenna for 5G mobile communications, including a dielectric substrate 1, a radiation patch 2 and a ground plate 3; the radiation patch 2 and the ground plate 3 are arranged on the same surface of the dielectric substrate 1 with an upper and lower interval; the radiation patch 2 and the ground plate 3 are connected through a feeding point 7 to form a broadband antenna, and the radiation patch 2 and the ground plate 3 located on one side of the feeding point 7 are partially connected through a coil 5 to adjust the impedance matching to increase the low-frequency bandwidth.

[0020] Furthermore, the radiation patch 2 and the ground plate 3 are arranged on the upper surface or the lower surface of the dielectric substrate 1 .

[0021] Furthermore, the radiation patch 2 is provided with a plurality of adjustment slots for adjusting the frequency and bandwidth.

[0022] Furthermore, the outer contour of the lower end of the radiation patch 2 corresponding to the gap satisfies that the size of the gap between the radiation patch 2 and the ground plate 3 gradually increases from the feeding point 7 to both sides.

[0023] Specifically, Figure 2 As shown, in this embodiment, the radiation patch 2 is printed on the upper surface of the dielectric substrate 1, and two pairs of rectangular slots 4 of the same size are provided on the symmetrical sides of the radiation patch 2. The radiation patch 2 and the ground plate 3 located next to the feeding point 7 are connected through the coil 5 to achieve the adjustability and wide bandwidth of the frequency and bandwidth. In addition, two triangular slots 6 of the same size are opened on both sides of the upper end of the ground plate 3 to better achieve antenna impedance matching and wide impedance bandwidth, thereby expanding the bandwidth of the antenna.

[0024] Furthermore, the rectangular groove 4 extends out of the corresponding side edges to form an opening.

[0025] Furthermore, in this embodiment, the first dielectric substrate 1 is an RF4 dielectric substrate 1 .

[0026] Furthermore, in this embodiment, the radiation patch 2 and the ground plate 3 are formed of copper, aluminum, silver or gold.

[0027] Furthermore, the feeding point 7 is arranged at the middle position of the gap between the radiation patch 2 and the ground plane 3 .

[0028] Furthermore, the feeding point 7 is electrically connected to a feeding transmission line.

[0029] The present invention adopts the above technical solution, which has the following beneficial effects compared with the prior art: 1. The radiation patch 2 of the present invention is connected to the grounding plate 3 through the coil 5 to adjust the impedance matching, increase the low-frequency bandwidth, and thus expand the bandwidth of the antenna; corresponding rectangular slots, triangular slots and trapezoidal slots are opened at different positions of the radiation patch 2 to achieve the adjustability and wideband of frequency and bandwidth; at the same time, corresponding rectangular slots are opened on the grounding plate 3 to better achieve impedance matching.

[0030] 2. The antenna of the present invention has good performance and compact size, can meet different application conditions, and is not affected by the background environment.

[0031] Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

Claims

1. A miniaturized broadband antenna for 5G mobile communications. Features: It includes a dielectric substrate, a radiation patch and a ground plate; the radiation patch and the ground plate are arranged on the same surface of the dielectric substrate with an upper and lower interval; the radiation patch and the ground plate are connected through a feeding point to form a wide-band antenna, and the radiation patch and the ground plate part located on one side of the feeding point are connected through a coil to adjust the impedance matching to increase the low-frequency bandwidth.

2. According to claim 1, a miniaturized broadband antenna for 5G mobile communications, Features: The radiation patch and the ground plate are arranged on the upper surface or the lower surface of the dielectric substrate.

3. According to claim 1, a miniaturized broadband antenna for 5G mobile communications, Features: The radiation patch is provided with a plurality of adjustment slots for adjusting the frequency and bandwidth.

4. A miniaturized broadband antenna for 5G mobile communications according to claim 1 or 3, Features: Two rectangular grooves of the same size are symmetrically arranged on the left and right sides of the radiation patch.

5. A miniaturized broadband antenna for 5G mobile communications according to claim 4, Features: The rectangular groove extends out of the corresponding side edges to form an opening.

6. A miniaturized broadband antenna for 5G mobile communications according to claim 1, Features: The outer contour of the lower end of the radiation patch corresponding to the gap satisfies that the size of the gap between the radiation patch and the ground plate gradually increases from the feeding point to both sides.

7. A miniaturized broadband antenna for 5G mobile communications according to claim 1, Features: Two triangular grooves of the same size are arranged on both sides of the upper end of the ground plate corresponding to the gap, so as to realize antenna impedance matching and wide impedance bandwidth.

8. The miniaturized broadband antenna for 5G mobile communications according to claim 1, Features: The feed point is set at the middle of the gap between the radiating patch and the ground plane.

9. The miniaturized broadband antenna for 5G mobile communications according to claim 1, Features: The feeding point is electrically connected to a feeding transmission line.

10. The miniaturized broadband antenna for 5G mobile communications according to claim 1, Features: The dielectric substrate is an RF4 dielectric substrate; the radiation patch and the ground plate are formed of copper, aluminum, silver or gold materials.

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