Annular coupling radiation structure antenna

Abstract

The utility model discloses an annular coupling radiation structure antenna, comprising a PCB substrate, a radiation part and a feed ground part, the PCB substrate is used as a basic carrier and can provide physical support for the radiation part and the feed ground part of the antenna; the radiation part comprises a feed arm, a feed welding point is reserved at one end of the feed arm, the other end of the feed arm is connected with a high-frequency coupling radiation surface, the high-frequency coupling radiation surface is partially coupled with a gap of the feed arm, a low-frequency coupling radiation surface is arranged at the tail end of the high-frequency coupling radiation surface in an extending manner, and the low-frequency coupling radiation surface is annular; the feed ground part serves as a grounding area of the antenna and comprises a feed ground welding point located at one end of the feed ground part and a feed ground extension section extending towards the other end of the feed ground part. According to the utility model, the bandwidth of the antenna can be increased under the same size, the current situation that the space requirement and the performance are unbalanced in the existing antenna design is further relieved, and the antenna can realize effective bandwidth resonance with a smaller size requirement, so that the design requirement of the antenna is met in a limited environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of antenna equipment, and in particular relates to a PCB antenna. Background Art

[0002] With the continuous development of 5G and the Internet of Things, people's demand for high-speed and reliable communication links has increased significantly. At the same time, for consumer electronic products, devices are increasingly tending to be miniaturized, and the clearance space reserved for antennas is getting smaller and smaller. The problem of antenna research and development being restricted by size is becoming more and more prominent. As a key component in the communication system, the antenna should have good characteristics of compact size, low profile and wide bandwidth. How to reduce the mutual influence between antennas working at the same frequency in a limited space is a difficult problem that scholars and practitioners at home and abroad have to solve.

[0003] There are two main antenna technologies used in the current mainstream 4 / 5G antennas, namely monopole and loop. Although monopole antennas have the advantages of simple structure and small area, their gain is relatively low and their efficiency is not ideal; while loop antennas have improved efficiency, but their size and area requirements are large. It is difficult to meet the application requirements of new forms, such as implantable devices, satellite applications, etc., which have high requirements on antenna performance and structural size.

[0004] Therefore, there is an urgent need for a small multi-frequency antenna that has excellent antenna performance while meeting the requirements of miniaturization. Utility Model Content

[0005] The utility model aims to provide a ring-shaped coupled radiation structure antenna to solve the shortcomings of the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A ring-coupled radiation structure antenna comprises a PCB substrate, a radiation part and a ground feed part. The PCB substrate is used as a basic carrier and can provide physical support for the radiation part and the ground feed part of the antenna. The radiation part comprises a feeding arm, a feeding welding point is reserved at one end of the feeding arm, and a high-frequency coupling radiation surface is connected to the other end. The high-frequency coupling radiation surface is partially coupled with the feeding arm gap. A low-frequency coupling radiation surface is extended at the end of the high-frequency coupling radiation surface. The low-frequency coupling radiation surface is ring-shaped. The ground feed part serves as a grounding area of ​​the antenna and comprises a ground feed welding point located at one end of the ground feed part and a ground feed extension section extending toward the other end of the ground feed part.

[0008] Furthermore, a branch extending toward the ground feeding portion is provided at one end of the feeding arm located at the feeding welding point, so that an inverted L-shaped gap coupling is formed between the feeding arm and the ground feeding portion.

[0009] Furthermore, the ground feed extension section is parallel to the high-frequency feeding portion, and the distance between the ground feed extension section and the high-frequency feeding portion is greater than the distance between the ground feed portion and the feeding arm.

[0010] Furthermore, the high-frequency coupling radiation surface includes a high-frequency feeding portion and a high-frequency radiation portion, and the high-frequency feeding portion is slot-coupled with the feeding arm.

[0011] Furthermore, a stepped transition radiation surface is provided between the high-frequency radiation portion and the low-frequency coupling radiation surface, which gradually reduces the width of the high-frequency radiation portion.

[0012] Furthermore, the low-frequency coupled radiation surface includes a U-shaped low-frequency feeding portion and a low-frequency radiation portion, one arm of the U-shaped low-frequency feeding portion is connected to the high-frequency radiation portion, and the low-frequency radiation portion is connected to both ends of the U-shaped low-frequency feeding portion, so that the U-shaped low-frequency feeding portion and the low-frequency radiation portion together constitute a ring-shaped coupled radiator.

[0013] Furthermore, low-frequency radiation resonance slots are symmetrically provided on the low-frequency radiation portion.

[0014] Compared with the prior art, the annular coupled radiation structure antenna provided by the utility model has the following beneficial technical effects:

[0015] 1. The utility model adopts a ring-shaped link structure of a ring-shaped coupled radiator to allow the signal to loop, thereby extending the effective path of the current, improving the resonant wavelength, shortening the length requirement of the antenna in practical applications, and increasing the antenna bandwidth at the same size. It can effectively improve the limitations of the antenna when using a monopole antenna, and at the same time reduce the high spatial size requirements of the Loop solution; further alleviate the current imbalance between space requirements and performance in antenna design, so that the antenna can achieve effective bandwidth resonance with a smaller size requirement, thereby meeting the antenna design requirements in a restricted environment.

[0016] 2. The utility model adopts the transition change produced by the stepped structure, which can make the coupling between the high-frequency radiating surface and the feeding arm produce a transition change from concentration to dispersion, thereby improving the antenna bandwidth and further improving the antenna performance.

[0017] 3. The utility model can effectively improve the resonant radiation characteristics of the antenna by adopting the inverted L-shaped slot coupling. When the current enters the inverted L-shaped slot, the electromagnetic wave formed in this area will be refracted and reflected in the slot, thereby increasing the antenna bandwidth. In addition, the inverted L-shaped feeding arm design satisfies the impedance matching design, reduces signal energy loss, reduces the antenna area, and improves the antenna radiation efficiency.

[0018] 4. The utility model improves the wavelength length and bandwidth of the antenna in the low frequency band by adopting a low-frequency radiation resonant slot, and increases the design space of the annular coupled radiation structure. When the current propagates in the resonant slot, electromagnetic waves will be generated. At this time, the electromagnetic waves will be reflected and refracted multiple times in the slot, thereby increasing the resonance width, further improving the overall bandwidth performance of the antenna, and enhancing the antenna efficiency, thereby meeting the adaptability of the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 A schematic diagram of a planar structure of a ring-shaped coupled radiation structure antenna provided by an embodiment of the utility model;

[0021] Figure 2 A test diagram of the standing wave ratio and return loss of a ring-shaped coupled radiation structure antenna provided in an embodiment of the utility model;

[0022] Figure 3 An efficiency diagram of a ring-shaped coupled radiation structure antenna provided by an embodiment of the utility model in the frequency band of 617MHz-960Mhz;

[0023] Figure 4 An efficiency diagram of a ring-shaped coupled radiation structure antenna provided by an embodiment of the utility model in the frequency band of 1710Mhz-2690MHz;

[0024] Figure 5 A gain diagram of a ring-shaped coupled radiation structure antenna provided by an embodiment of the utility model in the frequency band of 617MHz-960Mhz;

[0025] Figure 6 A gain diagram of a ring-shaped coupled radiation structure antenna provided in an embodiment of the utility model in the frequency band of 1710Mhz-2690MHz.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1-PCB substrate, 2-ground feeding part, 201-ground feeding welding point, 202-ground feeding extension section, 3-feeding arm, 301-feeding welding point, 302-branch, 4-high frequency feeding part, 5-high frequency radiation part, 501-transition radiation surface, 6-U-shaped low frequency feeding part, 7-low frequency radiation part, 8-low frequency radiation resonance slot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The embodiment of the utility model provides a ring-coupled radiation structure antenna, which is mainly a 4G antenna applied to 617MHz-960Mhz, 1710Mhz-2690MHz. Of course, the details of the scheme can be flexibly adjusted according to the actual situation to reduce the R&D cycle of such projects and improve the market competitiveness of the products. Figures 1 to 6 As shown, the utility model mainly includes a PCB substrate 1, a radiating part and a ground feed part 2. The PCB substrate 1 is used as a basic carrier and is made of a rectangular Rogers FR-4 substrate with a length of 54mm and a width of 17mm. It can provide physical support for other components of the antenna and also has good heat resistance and weather resistance. The radiating part and the ground feed part 2 are both covered on the same side surface as the PCB substrate 1. Specifically:

[0030] In this embodiment, the radiation part is a key part that generates electromagnetic radiation and is responsible for receiving radio waves, and specifically includes a feed arm 3, a high-frequency coupling radiation surface, and a low-frequency coupling radiation surface. Among them, a feed welding point 301 is reserved at one end of the feed arm 3, and the feed welding point 301 is used to be electrically connected to the core wire of the feed line, and the other end of the feed arm 3 is connected to the high-frequency coupling radiation surface.

[0031] The high-frequency coupling radiation surface includes a high-frequency feeding part 4 and a high-frequency radiation part 5. The high-frequency feeding part 4, as the high-frequency feeding center of the antenna, has a greater influence on the resonance of the high frequency, and forms a high-frequency resonant radiation signal by coupling with the ground feeding part 2. The high-frequency radiation part 5 is parallel to the feeding arm 3 and is gap-coupled with the feeding arm 3; the high-frequency radiation part 5, as the high-frequency radiation signal center, can further amplify the radiation signal based on the high-frequency feeding part 4. The high-frequency radiation part 5 and the high-frequency feeding part 4 together constitute the main high-frequency radiation microstrip line of the antenna.

[0032] Furthermore, as a preferred embodiment, a branch 302 is also provided on the feed arm 3, and the branch 302 is located at one end close to the feed welding point 301 and extends toward the ground feed part 2, so that the entire feed arm 3 is in an inverted L shape. The inverted L-shaped feed arm 3 can form an inverted L-shaped gap coupling with the ground feed part 2, and the resonant bandwidth of the antenna is improved by utilizing the gap coupling principle. When the current enters the inverted L-shaped gap, the electromagnetic wave formed in this area will be refracted and reflected in the gap, thereby increasing the antenna bandwidth. In addition, the design of the inverted L-shaped feed arm 3 satisfies the impedance matching design, reduces signal energy loss, and improves signal efficiency.

[0033] The low-frequency coupling radiation surface is arranged at the end of the high-frequency radiation part 5, and a stepped transition radiation surface 501 that gradually reduces the width of the high-frequency radiation part 5 is provided between the high-frequency radiation part 5 and the low-frequency coupling radiation surface, so that the end of the high-frequency radiation surface and the feeding arm 3 form a stepped gap coupling. The transition change is produced by this stepped structure, which can make the coupling effect between the high-frequency radiation surface and the feeding arm 3 produce a transition change from concentration to dispersion, thereby improving the high-frequency bandwidth.

[0034] The low-frequency coupling radiation surface is in a rectangular ring shape, including a U-shaped low-frequency feeding part 6 and a low-frequency radiating part 7. One arm of the U-shaped low-frequency feeding part 6 is connected to the high-frequency radiating part 5, and the low-frequency radiating part 7 is connected to both ends of the U-shaped low-frequency feeding part 6, so that the U-shaped low-frequency feeding part 6 and the low-frequency radiating part 7 together constitute a ring-shaped coupling radiator. By adopting this ring-shaped link structure, the signal can be looped, which can extend the effective path of the current, improve the resonant wavelength, shorten the length requirement of the antenna in practical applications, and increase the antenna bandwidth at the same size; it also has stronger radiation directivity, which can enhance the radiation intensity of electromagnetic waves, improve the radiation efficiency of the antenna, and further improve the antenna performance.

[0035] Furthermore, as a preferred embodiment, low-frequency radiation resonance slots 8 are symmetrically provided on the low-frequency coupling radiation surface. The low-frequency radiation resonance slots 8 are symmetrically slotted on the basis of the low-frequency radiation portion 7. The existence of the low-frequency radiation resonance slots 8 will change the radiation mode and bandwidth of the antenna. When the current propagates in the resonance slot, electromagnetic waves will be generated, and at this time, the electromagnetic waves will be reflected and refracted multiple times in the slot, thereby increasing the resonance width and further improving the antenna performance.

[0036] The ground feed part 2 is mainly used to establish the connection and coupling between the antenna and other circuit parts to ensure the effective transmission of the signal. As the grounding area of ​​the antenna, the ground feed part 2 includes a ground feed welding point 201 located at one end of the ground feed part 2 and a ground feed extension section 202 extending toward the other end of the ground feed part 2. Among them, the ground feed welding point 201 is used as a reserved assembly welding point on the ground feed part 2 to be electrically connected to the shielding layer of the feeder. In this embodiment, the ground feed welding point 201 is located on the same side of the feed welding point 301. Of course, the position of the ground feed welding point 201 is not fixed, and the specific welding position can be adjusted according to actual conditions. The ground feed extension section 202 extends toward the high-frequency feed part 4 and is parallel to the high-frequency feed part 4. The distance between the ground feed extension section 202 and the high-frequency feed part 4 is greater than the distance between the ground feed part 2 and the high-frequency feed part 4, so as to reduce the coupling effect between the high-frequency feed part 4 and the ground feed part 2, reduce energy loss, improve the efficiency and gain of the antenna, and optimize the overall performance of the antenna.

[0037] The above-mentioned embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A ring-shaped coupled radiation structure antenna, characterized in that: include: The PCB substrate (1) serves as a basic carrier and provides physical support for the radiation part and the ground feed part (2) of the antenna; The radiation part comprises a feeding arm (3), one end of the feeding arm (3) is provided with a feeding welding point (301), the other end is connected with a high-frequency coupling radiation surface, the high-frequency coupling radiation surface is partially coupled with the feeding arm (3) by a gap, a low-frequency coupling radiation surface is extended from the end of the high-frequency coupling radiation surface, and the low-frequency coupling radiation surface is in a ring shape; The ground feed portion (2), serving as a grounding area of ​​the antenna, comprises a ground feed welding point (201) located at one end of the ground feed portion (2) and a ground feed extension section (202) extending toward the other end of the ground feed portion (2).

2. The annular coupled radiation structure antenna according to claim 1, characterized in that: One end of the feed arm (3) located at the feed welding point (301) is provided with a branch (302) extending in the direction of the ground feed portion (2), so that an inverted L-shaped gap coupling is formed between the feed arm (3) and the ground feed portion (2).

3. The annular coupled radiation structure antenna according to claim 1, characterized in that: The high-frequency coupling radiation surface comprises a high-frequency feeding portion (4) and a high-frequency radiation portion (5), and the high-frequency feeding portion (4) is slot-coupled with the feeding arm (3).

4. The annular coupled radiation structure antenna according to claim 3, characterized in that: The ground feed extension section (202) is parallel to the high-frequency feeding section (4), and the distance between the ground feed extension section (202) and the high-frequency feeding section (4) is greater than the distance between the ground feed section (2) and the feeding arm (3).

5. The annular coupled radiation structure antenna according to claim 3, characterized in that: A stepped transition radiation surface (501) is provided between the high-frequency radiation portion (5) and the low-frequency coupling radiation surface, which gradually reduces the width of the high-frequency radiation portion (5).

6. The annular coupled radiation structure antenna according to claim 3, characterized in that: The low-frequency coupling radiation surface comprises a U-shaped low-frequency feeding portion (6) and a low-frequency radiation portion (7), one arm of the U-shaped low-frequency feeding portion (6) is connected to the high-frequency radiation portion (5), and the low-frequency radiation portion (7) is connected to both ends of the U-shaped low-frequency feeding portion (6), so that the U-shaped low-frequency feeding portion (6) and the low-frequency radiation portion (7) together constitute a ring-shaped coupling radiator.

7. The annular coupled radiation structure antenna according to claim 6, characterized in that: The low-frequency radiation portion (7) is symmetrically provided with low-frequency radiation resonance slots (8).

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