Application design for improving antenna performance through coupling mode

Abstract

The invention discloses an application design for improving the performance of an antenna through a coupling mode, and the design comprises an antenna body, the antenna body comprises an antenna housing, the antenna housing is plated with an antenna radiator through an LDS technology, one end of the antenna radiator is provided with an elastic sheet, and the other end of the antenna radiator is provided with an elastic sheet. The housing is provided with an LDS suspension wire located at one side of one end of the antenna radiator. The antenna has the advantage that the performance of the antenna is improved by utilizing the coupling of the LDS suspension routing and the antenna radiator.

Description

Technical Field

[0001] The present invention relates to the field of antennas, and in particular to an application design that improves antenna performance by coupling. Background Art

[0002] As the mobile phone industry gradually matures and market competition becomes increasingly fierce, a variety of mobile phones have emerged, and people's requirements for mobile phones are getting higher and higher. Current handheld terminals are developing towards miniaturization and intelligence. With the application of the fifth-generation communication technology (5G), the number of antennas has increased significantly compared with the previous generation of communication. The miniaturization of terminal equipment, coupled with the full-screen design, further compresses the design space of the antenna, which affects the performance of the antenna and reduces the radiation efficiency of the antenna.

[0003] The built-in antennas mainly include: ceramic antennas, printed circuit board (PCB) antennas, flexible circuit board FPC (hereinafter referred to as FPC) antennas, metal sheet antennas, LDS, and laser activated metal plating process (hereinafter referred to as LAP) antennas. FPC (Flexible Printed Circuit) is a flexible printed circuit board composed of a flexible substrate and circuit components that can work in bending and folding. FPC is widely used in mobile phones, tablets, e-books, automotive electronics and other fields. LDS antenna uses a special laser to engrave the set circuit on the surface of the plastic device. After chemical electroplating, a metal layer circuit is formed on the plastic surface; LAP is a laser-induced ordinary material, and then selective metal plating is performed. Nowadays, the clearance of most antennas is getting smaller and smaller, and there are more and more metal parts inside the equipment. On this basis, the difficulty of designing antennas is also increasing. The current solution to this problem is that when designing the antenna, the antenna radiator should be away from metal parts, away from battery cameras and other structural parts that have a greater impact on the antenna, to improve the radiation efficiency of the antenna. At present, there are more and more 5G devices, and the number of antennas has increased exponentially.

[0004] In addition, with existing technology, for terminal device antenna design, the location can only be away from metal components, batteries, etc., but with the rise of 5G technology applications and the increase in the number of terminal device antennas, some antennas cannot completely avoid metal devices. The main antennas can only be placed in relatively good areas, and other antennas have a greater impact on antenna performance. Nowadays, full-screen and curved screens have very little space left for antennas, and generally metal components are avoided. Efficiency is generally difficult to achieve, so there is room for improvement.

[0005] This antenna design uses the coupling between the LDS suspension trace and the antenna radiator to improve the performance of the antenna, or you can try to improve it by coupling the distance between the two antennas. If the antenna radiator uses the LDS suspension trace coupling solution, it will greatly improve the efficiency to solve this problem. Summary of the invention

[0006] The purpose of the present invention is to provide an application design for improving antenna performance by coupling to solve the problems raised in the above background technology. It has the advantage of improving antenna performance by coupling LDS suspension routing with antenna radiators.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an application design for improving antenna performance through coupling, comprising an antenna body, the antenna body comprising an antenna housing, the antenna housing being plated with an antenna radiator using the LDS process, a spring piece being provided at one end of the antenna radiator, and the housing being provided with an LDS suspended routing located on one side of one end of the antenna radiator.

[0008] By adopting the above technical solution, the LDS suspension line makes the antenna resonance of the frequency of 1710MHz-2700MHz deeper and wider by coupling the antenna radiator. Without the LDS suspension line, the radiation efficiency of the medium and high frequencies is poor, the return loss is about -6db, and the transmission loss is large. By adding the LDS suspension line, the return loss becomes smaller, the antenna radiation efficiency is increased by 6-7db, and the antenna performance is better improved.

[0009] Preferably, the distance between the LDS suspension wiring and one end of the antenna radiator is set to 0.5 mm-2.5 mm.

[0010] Preferably, the antenna radiator is configured as a monopole, a loop antenna or an ifa antenna.

[0011] Preferably, the length of the LDS suspension trace is approximately one quarter of the antenna wave length, which is approximately 20-40 mm.

[0012] Preferably, the distance between the LDS suspension wiring and one end of the antenna radiator is set to be about 0.7 mm.

[0013] Preferably, the antenna radiator has a total length of 1.8 cm, a width of 2 mm and is arranged in a U-shape.

[0014] Preferably, the LDS suspension routing is divided into a first branch, a second branch and a third branch, the first branch corresponds to a 1700-2100 MHZ frequency band, the second branch corresponds to a 2300-2700 MHZ frequency band, the third branch corresponds to a 3300-5000 MHZ frequency band, and the three branches are π-shaped routing.

[0015] Preferably, the antenna body process design selects any one of LAP, LDS or FPC, and the antenna form selects any one of IFA antenna, loop antenna, or monopole antenna.

[0016] Preferably, the antenna radiator may also be made using LAP or FPC technology.

[0017] Compared with the prior art, the present invention has the following beneficial effects: With the addition of LDS suspension routing coupling, the antenna return loss is significantly reduced and the antenna radiation efficiency is increased. Similarly, when the antenna radiation efficiency is not coupled with LDS suspension routing, the efficiency is around -12db in some frequency bands. With the addition of LDS suspension routing coupling, the efficiency is -6db~-7db, which is a relative improvement of about 5-6db. According to the 2 antenna efficiency graphs, the blue one is with LDS suspension routing, and the red one is without LDS suspension routing. It can be clearly seen that the mid- and high-frequency efficiency is improved by 5-6db. Figure 3 Return loss, red is without LDS suspension routing, blue is with LDS suspension routing, it can also be seen that the mid-high frequency is significantly improved. Therefore, the design scheme after LDS suspension routing coupling effectively improves the antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A top view structural diagram of a directional antenna provided in this embodiment; Figure 2 A comparison diagram of antenna return loss provided in this embodiment; Figure 3 This is a comparison diagram of the antenna radiation efficiency provided in this embodiment.

[0019] In the figure: 1. Antenna housing; 2. Antenna radiator; 3. Shrapnel; 4. LDS suspension routing. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the embodiment of the present invention, An application design for improving antenna performance by coupling, including an antenna body, wherein the antenna body includes an antenna housing 1, the antenna housing 1 is plated with an antenna radiator 2 using an LDS process, a spring 3 is provided at one end of the antenna radiator 2, and the housing is provided with an LDS suspended trace 4 located on one side of one end of the antenna radiator 2.

[0022] The distance between the LDS suspension wiring 4 and one end of the antenna radiator 2 is set to 0.5 mm-2.5 mm.

[0023] The antenna radiator 2 is configured as a monopole, a loop antenna or an ifa antenna.

[0024] The length of the LDS suspension wiring 4 is approximately one quarter of the antenna wave length, which is approximately 20-40 mm.

[0025] The distance between the LDS suspension wiring 4 and one end of the antenna radiator 2 is set to be about 0.7 mm.

[0026] The antenna radiator 2 has a total length of 1.8 cm, a width of 2 mm and is arranged in a U-shape.

[0027] The LDS suspension routing 4 is divided into a first branch, a second branch and a third branch. The first branch corresponds to the 1700-2100 MHZ frequency band, the second branch corresponds to the 2300-2700 MHZ frequency band, and the third branch corresponds to the 3300-5000 MHZ frequency band. The three branches are π-shaped routing.

[0028] The antenna body process design selects any one of LAP, LDS or FPC, and the antenna form selects any one of IFA antenna, loop antenna, or monopole antenna.

[0029] The antenna radiator 2 may also be made using LAP or FPC technology.

[0030] Figure 2 and Figure 3 The figure shows the antenna return loss and antenna efficiency. When coupled with LDS suspension line 4, the antenna return loss is significantly reduced and the antenna radiation efficiency is improved. Similarly, when the antenna radiation efficiency is not coupled with LDS suspension line 4, the efficiency is around -12db in some frequency bands. After coupling with LDS suspension line 4, the efficiency is between -6db and -7db, which is a relative improvement of about 5-6db. Figure 3 Antenna efficiency chart, blue is with LDS suspension trace 4, red is without LDS suspension trace 4, it can be clearly seen that the mid-high frequency efficiency is improved by 5-6db. Figure 2 Return loss, red is without LDS suspension trace 4, blue is with LDS suspension trace 4, it can also be seen that the mid-high frequency is significantly improved. Therefore, the design scheme after coupling with LDS suspension trace 4 effectively improves the antenna performance.

[0031] It should be noted that the antenna radiator 2 can be realized not only through the LDS process, but also the LAP and FPC processes are applicable, or it can also be reflected in the cnc and mda processes. According to the relationship between the metal trace length and the antenna wavelength, frequencies including but not limited to 1710 - 2700 MHz can be coupled. The coupled LDS floating trace 4 can be LDS or other metal processes. The antenna radiator 2 can be in the form of a monopole or other forms of antennas, such as a loop antenna, an ifa antenna, etc. The optimal coupling distance between the antenna radiator 2 and the LDS floating trace 4 is 0.7 mm, and coupling can be carried out within the range of 0.5 mm - 2.5 mm, achieving the effect of improving the antenna radiation performance. The closer the antenna is to the metal trace, the more obvious the effect is.

[0032] The antenna of the present invention can be placed on the side of the battery. Not only will the antenna performance not be reduced, but the radiation performance of the antenna will also be significantly improved. The antenna design process form can be LAP, LDS or FPC, and the antenna form can be an IFA antenna, a loop antenna, or a monopole antenna. The designed position of the antenna is about 0.7 mm away from the LDS floating trace 4, and the length of the floating trace is close to a quarter wavelength. Of course, the length of this LDS floating trace 4 is for the (1700 - 2700 MHZ) frequency band. Different frequencies can also be voltage-coupled according to different floating trace sizes and the antenna radiator 2, so that the return loss becomes smaller and the antenna radiation efficiency becomes higher.

[0033] A feeding point is provided at one end of the antenna radiator 2, and the LDS floating trace 4 is arranged near one end of the feeding point. The LDS floating trace 4 further includes a first branch, a second branch, and a third branch; at the same time, the first branch, the second branch, and the third branch respectively represent the intermediate frequency (1700 - 2200 MHZ), high frequency (2300 - 2700 MHZ), and ultra-high frequency (3300 - 5000 MHZ). The first branch, the second branch, and the third branch, and the LDS floating trace 4 is in a π shape. The total length of the antenna radiator 2 is 1.8 cm and the width is 2 mm, in a 匚 shape. The first branch of the LDS floating trace 4 is 5 cm long and 2 mm wide, the second branch is 3 cm long and 2 mm wide, and the third branch is 1.5 cm long and 2 mm wide. This LDS floating trace 4 expands the bandwidth by coupling with the antenna radiator 22, increasing the intermediate and high frequency (1700 - 2700 MHZ) frequency band. In this way, the structure of the terminal device is fully utilized, turning the floating trace that is not conducive to antenna radiation itself or the adjacent antenna radiation source into a part of antenna radiation, and improving the performance of the antenna.

[0034] In the case of not adding the LDS floating trace 4, the radiation efficiency of the intermediate and high frequencies is poor, the return loss is about -6 db, and the transmission loss is large. After adding the LDS floating trace 4, the return loss becomes smaller, and the antenna radiation efficiency increases by 6 - 7 db, better improving the antenna performance.

[0035] according to Figure 2 It is obvious that when there is only a monopole radiating antenna, the return loss in the 1700-2700MHZ frequency band is large. Figure 3 The efficiency is low. If the traditional routing method is used, it is likely that the frequency deviation will exceed the frequency band after a slight adjustment of the routing, or the efficiency will not be greatly improved. In addition, the LDS floating routing 4 antennas, 1700-2700MHZ frequency band, Figure 2 The return loss becomes smaller, Figure 3 The antenna design can be designed as a loop antenna, PIFA antenna or IFA antenna according to different design environments.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An application design for improving antenna performance by coupling, characterized in that: The invention comprises an antenna body, wherein the antenna body comprises an antenna casing (1), the antenna casing (1) is plated with an antenna radiator (2) by using an LDS process, one end of the antenna radiator (2) is provided with a spring piece (3), and the casing is provided with an LDS suspension wiring (4) located on one side of one end of the antenna radiator (2).

2. According to claim 1, the application design for improving antenna performance by coupling is characterized in that: The distance between the LDS suspension wiring (4) and one end of the antenna radiator (2) is set to 0.5 mm-2.5 mm.

3. According to claim 1, the application design for improving antenna performance by coupling is characterized in that: The antenna radiator (2) is configured as a monopole, a loop antenna or an ifa antenna.

4. According to claim 1, the application design for improving antenna performance by coupling is characterized in that: The length of the LDS suspension wiring (4) is approximately one quarter of the antenna wave length, which is approximately 20-40 mm.

5. According to claim 2, the application design for improving antenna performance by coupling is characterized in that: The distance between the LDS suspension wiring (4) and one end of the antenna radiator (2) is set to be approximately 0.7 mm.

6. The application design for improving antenna performance by coupling according to claim 1, characterized in that: The antenna radiator (2) has a total length of 1.8 cm, a width of 2 mm and is arranged in a U-shape.

7. The application design for improving antenna performance by coupling according to claim 1, characterized in that: The LDS suspension routing (4) is divided into a first branch, a second branch and a third branch. The first branch corresponds to the 1700-2100 MHZ frequency band, the second branch corresponds to the 2300-2700 MHZ frequency band, and the third branch corresponds to the 3300-5000 MHZ frequency band. The three branches are π-shaped routing.

8. The application design for improving antenna performance by coupling according to claim 1, characterized in that: The antenna body process design selects any one of LAP, LDS or FPC, and the antenna form selects any one of IFA antenna, loop antenna, or monopole antenna.

9. The application design for improving antenna performance by coupling according to claim 1, characterized in that: The antenna radiator (2) may also be made using LAP or FPC technology.

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