Wide-beam metal frame mobile phone antenna

Abstract

The invention discloses a wide-beam metal frame mobile phone antenna, which comprises a metal frame provided with a plurality of opening gaps and a plurality of short circuit columns, the metal frame is divided into a plurality of frame components to form monopole antennas, and at least parts of the monopole antennas are positioned on the same straight line. According to the wide-beam metal frame mobile phone antenna, the plurality of opening gaps are formed in the metal frame of the wide-beam metal frame mobile phone antenna, so that the plurality of monopole antennas are formed on the metal frame, the multi-element monopole antenna array is further formed, the beam width can be expanded, the radiation efficiency can be improved, and the effects of wide beam and high gain can be achieved; the metal frame serves as an outer frame of the intelligent terminal, can play a role in fixing and protecting the intelligent terminal, and also serves as a radiator of an antenna of the intelligent terminal, so that the radiation performance of the intelligent terminal is improved, extra space does not need to be occupied, and the compactness of the intelligent terminal is improved. The antenna can be widely applied to the technical field of terminal equipment antennas.

Description

Technical Field

[0001] The invention relates to the technical field of antennas, in particular to a wide-beam metal frame mobile phone antenna. Background Art

[0002] Smart terminals not only pursue high-speed data transmission, but also pay attention to the product's appearance design and additional performance. For example, in order to achieve stronger data processing performance, smart terminals such as mobile phones need to be equipped with heat dissipation components; in order to achieve longer battery life, a larger battery pack is needed; and the popularity of full-screen mobile phones has led to an increase in the screen-to-body ratio, leaving less clearance for the antenna. Therefore, various components in smart terminals are "occupying" the available space for the antenna, and the design of high-performance terminal antennas faces huge challenges. Summary of the invention

[0003] In view of the technical problems such as the small available space for antennas in current smart terminals, the purpose of the present invention is to transform the frame itself into a part of the antenna, working as a radiator, and provide a wide-beam metal frame mobile phone antenna.

[0004] An embodiment of the present invention includes a wide-beam metal frame mobile phone antenna, and the wide-beam metal frame mobile phone antenna includes:

[0005] The wide beam metal frame mobile phone antenna comprises a metal frame;

[0006] The metal frame is provided with a plurality of opening gaps and a plurality of short-circuit posts, and each of the opening gaps divides the metal frame into a plurality of frame components;

[0007] The frame component between a part of the opening slot and an adjacent opening slot, and the frame component between another part of the opening slot and the short-circuit post are respectively used as monopole antennas;

[0008] At least a portion of each of the monopole antennas is located on the same straight line.

[0009] Furthermore, the shape of the metal frame is a rectangle;

[0010] The plurality of opening gaps include a first opening gap, a second opening gap and a third opening gap;

[0011] The first opening gap is located on a first side of the metal frame, and the second opening gap and the third opening gap are located on a second side of the metal frame; the first side and the second side are two adjacent sides.

[0012] Furthermore, the frame component between the first opening slot and the second opening slot is used as a first monopole antenna;

[0013] The frame component between the second opening slot and the third opening slot is used as a second monopole antenna;

[0014] The frame component between the third opening gap and the third short-circuit post is used as a third monopole antenna.

[0015] Further, the wide beam metal frame mobile phone antenna includes a feeding probe;

[0016] The feeding probe is connected to the second monopole antenna.

[0017] Further, the wide beam metal frame mobile phone antenna includes at least one inductor;

[0018] One end of the inductor is connected to a corresponding one of the monopole antennas;

[0019] The other end of the inductor is used for connecting with the mainboard.

[0020] Further, the wide beam metal frame mobile phone antenna includes a plurality of short-circuit posts;

[0021] One end of each of the short-circuit posts is connected to a corresponding frame component;

[0022] The other end of each short-circuit column is used for connecting with the main board.

[0023] Furthermore, at least part of the open gaps are filled with filling material to form closed gaps.

[0024] Furthermore, the filling material is a material with low electrical conductivity.

[0025] Furthermore, the melting point of the filling material is lower than the melting point of the metal frame. The beneficial effects of the present invention are as follows: the wide-beam metal frame mobile phone antenna in the embodiment forms multiple monopole antennas on the metal frame by setting multiple opening gaps on the metal frame of the wide-beam metal frame mobile phone antenna, thereby forming a one-dimensional three-element monopole antenna array, which helps to expand the beam width and improve the radiation efficiency, thereby achieving a wide beam and high gain effect; the metal frame serves as the outer frame of the smart terminal, plays the role of fixing and protecting the smart terminal, and is also used as the radiator of the antenna of the smart terminal, without occupying the volume of other components such as batteries, thereby helping to reduce the space occupied by the antenna, improve the performance of the smart terminal in other aspects, and improve the compactness of the smart terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A top view of a wide-beam metal frame mobile phone antenna in an embodiment;

[0027] Figure 2 A top view of a wide-beam metal frame mobile phone antenna with a fourth opening gap in the embodiment;

[0028] Figure 3 A top view of a wide-beam metal frame mobile phone antenna with a bent short-circuit post in an embodiment;

[0029] Figure 4 A top view of a wide beam metal frame mobile phone antenna provided with capacitors and inductors in an embodiment;

[0030] Figure 5 XOY radiation patterns of the wide beam metal frame mobile phone antenna at 3.1 GHz, 3.2 GHz, and 3.3 GHz in the embodiment;

[0031] Figure 6 The YOZ radiation pattern of the wide beam metal frame mobile phone antenna at 3.1 GHz, 3.2 GHz, and 3.3 GHz in the embodiment;

[0032] Figure 7 This is a schematic diagram of S parameters obtained by simulating a wide-beam metal frame mobile phone antenna in an embodiment;

[0033] Figure 8 The XOY radiation pattern at the resonance point (3.25 GHz) is obtained by simulating the wide beam metal frame mobile phone antenna in the embodiment;

[0034] Fig. 9 The YOZ radiation pattern at the resonance point (3.25 GHz) is obtained by simulating the wide beam metal frame mobile phone antenna in the embodiment. DETAILED DESCRIPTION

[0035] The metal frame design of mobile phones has excellent structural strength and aesthetic characteristics, and has been widely welcomed by the market. For smart terminals with metal frames, the metal frame itself can be transformed into part of the antenna and work as a radiator, which can reduce the use of space on the mobile phone motherboard by the antenna. Wide-beam metal frame mobile phone antennas can expand the coverage area, enhance signal strength, and effectively improve communication quality. On the basis of solving the problem of antenna space, it is also necessary to consider the problem of achieving wide beam and high gain.

[0036] This embodiment provides a wide beam metal frame mobile phone antenna, and the top view of the wide beam metal frame mobile phone antenna is as follows: Figure 1 shown.

[0037] Reference Figure 1The wide beam metal frame mobile phone antenna includes a metal frame, which can be a single metal or alloy such as aluminum, copper or titanium. In this embodiment, the metal frame is rectangular and includes a side parallel to the y-axis (first side) and a side parallel to the x-axis (second side). The size of the metal frame is 150mm×75mm×7mm. Specifically, the length of the first side, which is the side parallel to the y-axis, is 150mm, and the length of the second side, which is the side parallel to the x-axis, is 75mm. Figure 1 The thickness in the direction perpendicular to the x-axis and y-axis is 7 mm.

[0038] Reference Figure 1 , the metal frame is provided with a plurality of opening gaps, such as a first opening gap, a second opening gap and a third opening gap. Among them, if the metal frame is regarded as a completely closed circle in itself, then each opening gap is equivalent to the missing part of the circle. Therefore, the opening gap can also be called a "gap" or a "groove", etc. The cross-sectional shape of the opening gap can be rectangular or circular, etc. When making the metal frame, the metal material may not be applied at the location of the opening gap, thereby directly forming the opening gap. Alternatively, a completely closed circle with the same overall shape as the metal frame may be first made, and part of the metal material may be removed by cutting, grinding or corrosion, thereby forming the opening gap.

[0039] Reference Figure 1 Since the metal frame is provided with a plurality of opening gaps, the overall shape of the metal frame is not a completely closed circle, but is divided into a plurality of sections by these opening gaps. In this embodiment, each section is referred to as a frame component.

[0040] Reference Figure 1 In this embodiment, the mainboard of a smart terminal such as a mobile phone or a tablet computer can be installed in a metal frame, and the metal frame plays a role in fixing and protecting the mainboard.

[0041] In this embodiment, it is also possible to Figure 2 In that way, on the basis of the first opening slot, the second opening slot and the third opening slot, a fourth opening slot is set on the frame component adjacent to the third opening slot (far away from the second opening slot, that is, not adjacent to the second opening slot), and the frame component between the third opening slot and the fourth opening slot is used as the third monopole antenna.

[0042] Reference Figure 1The metal frame is connected to the mainboard through short-circuit posts such as the first short-circuit post, the second short-circuit post, and the third short-circuit post and an inductor. Specifically, the first opening slot, the second opening slot, and the third opening slot divide the metal frame into a plurality of frame components, wherein the frame component between the first opening slot and the second opening slot serves as the first monopole antenna, the frame component between the second opening slot and the third opening slot serves as the second monopole antenna, and the frame component between the second opening slot and the third short-circuit post serves as the third monopole antenna, thereby forming three monopole antennas.

[0043] Reference Figure 1 The first short-circuit post is installed at the first opening gap, thereby connecting the frame component away from the first monopole antenna and the main board; the second short-circuit post is installed at the first monopole antenna, thereby connecting the first monopole antenna and the main board; the third short-circuit post is installed at the third monopole antenna, thereby connecting the third monopole antenna and the main board.

[0044] In this embodiment, refer to Figure 1 The second monopole antenna and the third monopole antenna are entirely located on the second side of the metal frame (the side parallel to the x-axis), and the first monopole antenna is a right-angle bend shape, with one side located on the second side of the metal frame (the side parallel to the x-axis). Therefore, the first monopole antenna, the second monopole antenna and the third monopole antenna each have at least a portion or are entirely located on the same straight line (the straight line parallel to the x-axis), thereby forming a one-dimensional array of monopole antennas.

[0045] In this embodiment, refer to Figure 1 and Figure 2 The wide beam metal frame mobile phone antenna is provided with a feeding probe, the inner conductor of the feeding probe is connected to one of the monopole antennas, such as the second monopole antenna in this embodiment, and the outer conductor is connected to the metal main board. When the wide beam metal frame mobile phone antenna is working, the wide beam metal frame mobile phone antenna is fed by the feeding probe.

[0046] In this embodiment, in addition to being able to use Figure 1 and Figure 2 In addition to the strip shorting column shown, it can also be Figure 3 As shown, short-circuit posts with bent, rectangular, gradient or other special shapes are used.

[0047] In this embodiment, the working principle of the wide beam metal frame mobile phone antenna is: by setting a plurality of opening gaps on the metal frame of the wide beam metal frame mobile phone antenna, a plurality of monopole antennas are formed on the metal frame. Figure 1 and Figure 2For example, the second monopole antenna is directly connected to the feeding probe for feeding, so that the metal frame has the function of sending and receiving signals, and the first monopole antenna and the third monopole antenna on both sides of the second monopole antenna are equivalent to parasitic monopoles, which are located on the same straight line as the second monopole antenna, thereby forming a one-dimensional three-element monopole antenna array, which is helpful to expand the beam width and improve the radiation efficiency, thereby achieving a wide beam (especially the beam width on the side where each opening gap is located, for example Figure 1 and Figure 2 The metal frame not only serves as the outer frame of the smart terminal, fixing and protecting the smart terminal, but also serves as the radiator of the antenna of the smart terminal, without occupying the volume of other components such as batteries, thereby helping to reduce the space occupied by the antenna and improve the performance of the smart terminal in other aspects.

[0048] In this embodiment, when using a wide beam metal frame mobile phone antenna, it is generally possible to Figure 1 , Figure 2 and Figure 3 The right half shown is used as the upper half of the smart terminal, thereby achieving the effect of widening the beam in the upper half of the smart terminal. The principle of wide beam is as follows: multiple monopole antennas form a one-dimensional linear array along the X-axis, and the current distribution of the monopole is optimized, thereby achieving the widening of the XOY plane beam; since the H-plane radiation pattern naturally has a wide beam characteristic, the beam is widened, and the back lobe of the beam is small, with the characteristics of wide beam and high gain.

[0049] In this embodiment, the wide-beam metal frame mobile phone antenna also has the advantage of simple structure and easy processing.

[0050] In this embodiment, the width of the opening gap and the clearance between the mainboard and the metal frame can be made smaller. For example, in actual production, the width of the opening gap and the clearance between the mainboard and the metal frame can be made to 1 mm, thereby improving the compactness of the smart terminal and maintaining the mechanical strength of the metal frame.

[0051] Since the gap between the metal frame and the motherboard is close, a capacitive effect may occur. If the capacitive effect is strong, the impedance matching bandwidth of the wide-beam metal frame mobile phone antenna may be narrow. For this case, at least one inductor can be introduced, and each inductor corresponds to a monopole antenna. For example, for the first monopole antenna, the second monopole antenna, and the third monopole antenna, three inductors can be introduced, wherein one end of the first inductor is connected to the first monopole antenna, one end of the second inductor is connected to the second monopole antenna, and one end of the third inductor is connected to the third monopole antenna. The other ends of these three inductors are all connected to the motherboard. Figure 1 and Figure 2Only the inductor to which the second monopole antenna is connected is shown.

[0052] By setting an inductor, the influence of the capacitance effect can be weakened and the impedance matching performance of the antenna can be significantly improved.

[0053] In this embodiment, a capacitor may be provided between two adjacent monopole antennas. Figure 4 As shown, a capacitor is provided between the first monopole antenna and the second monopole antenna, and a capacitor is provided between the second monopole antenna and the third monopole antenna. Specifically, the capacitor between the first monopole antenna and the second monopole antenna is located at the position where the second opening gap is located, and its two ends are respectively connected to the first monopole antenna and the second monopole antenna; the capacitor between the second monopole antenna and the third monopole antenna is located at the position where the third opening gap is located, and its two ends are respectively connected to the second monopole antenna and the third monopole antenna.

[0054] In this embodiment, by providing a capacitor, the coupling capability between adjacent monopole antennas can be enhanced, thereby improving the antenna radiation efficiency.

[0055] In this embodiment, between two adjacent opening gaps (for example Figure 1 between the first opening gap and the second opening gap in the middle), between adjacent opening gaps and short-circuit posts (e.g. Figure 1 The electrical dimensions of the third opening gap and the third short-circuit post are both in the range of 0.2-0.5 vacuum wavelength.

[0056] In this embodiment, Figure 4 The XOY radiation patterns of the wide beam metal frame mobile phone antenna at 3.1GHz, 3.2GHz, and 3.3GHz are as follows: Figure 5 As shown, the YOZ radiation patterns at 3.1GHz, 3.2GHz, and 3.3GHz are as follows Figure 6 As shown, the S parameter simulation results obtained are as follows Figure 7 As shown, the simulation results of the XOY radiation pattern at the resonance point (3.25GHz) are as follows Figure 8 As shown, the simulation results of the YOZ surface radiation pattern at the resonance point (3.25GHz) are as follows Fig. 9 shown.

[0057] Figure 7 , Figure 8 and Fig. 9 The simulation results shown show that Figure 1The 10dB impedance bandwidth of the wide-beam metal frame mobile phone antenna with a structure ranges from 3.05GHz to 3.41GHz; in the XOY plane and YOZ plane, the 3dB beam width of the wide-beam metal frame mobile phone antenna exceeds 206° and 226° respectively; the wide-beam metal frame mobile phone antenna not only effectively expands the signal coverage area, but also significantly enhances the signal strength, thereby improving the communication quality.

[0058] In this embodiment, the effect of the wide beam metal frame mobile phone antenna can be summarized as follows:

[0059] Optimized space utilization: Only the metal frame is used directly as the antenna radiator, which effectively saves internal space and reduces interference with other components;

[0060] Wide beam design: By introducing multiple radiation units, the wide beam effect is successfully achieved, expanding the signal coverage range;

[0061] Simple and efficient structure: The antenna design has a simple structure, which is easy to manufacture and integrate, while maintaining efficient radiation performance, improving the overall system efficiency.

[0062] In this embodiment, all the gaps in the wide beam metal frame mobile phone antenna can exist in the form of open gaps, or some of the open gaps can be changed into closed gaps. Specifically, a low-conductivity filling material different from the material of the metal frame can be filled into some or all of the open gaps, which is equivalent to filling the open gaps from the perspective of space occupation. In this embodiment, the open gaps filled with the filling material are called closed gaps.

[0063] In this embodiment, the filling material can be processed or combined into the same shape as the open gap, so that the filling material is fixed to the metal frame around the open gap through mechanical effects such as friction or elastic force, so that the open gap is filled and becomes a closed gap. In this case, a low-conductivity material (such as plastic, ceramic, glass, gel, silicone grease, foam, etc.) different from the metal frame can be used as the filling material, and the filling material in the closed gap can be removed by a simple mechanical operation, so that the closed gap becomes an open gap.

[0064] In this embodiment, a material with a lower melting point than the metal frame can be used as the filling material. For example, when aluminum alloy or titanium alloy is used as the metal frame, a low melting point material such as plastic can be used as the filling material. In this case, the filling material in the closed gap can be heated so that the filling material melts and leaves the closed gap, so that the closed gap becomes an open gap.

[0065] In this embodiment, the closed gap is filled with a filling material with low conductivity, so that the closed gap becomes a component of the metal frame, which is equivalent to making the open gap "disappear", and removing the filling material in the closed gap can make the open gap reappear. Therefore, by filling the closed gap with a filling material with low conductivity, the open gap can be flexibly set or eliminated according to needs during the use and maintenance of the wide beam metal frame mobile phone antenna after it is manufactured. For example, the distance between two adjacent open gaps affects the length of the monopole antenna, thereby affecting the array factor. When making a metal frame, a plurality of open gaps with a large number and a close distance can be pre-processed on the metal frame, and then a corresponding number of open gaps are reserved according to the length of the most commonly used monopole antenna, and the other open gaps are filled with filling materials with low conductivity, so that these open gaps become closed gaps; if the user does not need to change the length of the monopole antenna later, there is no need to operate the closed gaps. If the user needs to change the length of the monopole antenna later, the user can take out the filling material in the corresponding closed gap to make the corresponding closed gap an open gap, and fill the corresponding open gap with a low conductivity filling material when necessary to make the corresponding open gap a closed gap, thereby realizing the addition of new opening gaps or changing the position of the opening gaps, making the number and position of the opening gaps adjustable, and improving the application flexibility of the wide-beam metal frame mobile phone antenna.

[0066] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present disclosure are only relative to the relative positional relationship of the components of the present disclosure in the accompanying drawings. The singular forms of "a", "" and "the" used in the present disclosure are also intended to include the plural forms, unless the context clearly indicates other meanings. In addition, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as those generally understood by those skilled in the art. The terms used in the specification of this embodiment are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this embodiment includes any combination of one or more related listed items.

[0067] It should be understood that, although the term first, second, third etc. may be adopted to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish the same type of elements from each other. For example, without departing from the scope of the present disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element. The use of any and all examples or exemplary language ("for example", "such as" etc.) provided by the present embodiment is only intended to better illustrate embodiments of the present invention, and unless otherwise required, the scope of the present invention will not be limited.

[0068] The above are only preferred embodiments of the present invention. The present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may have various modifications and changes.

Claims

1. A wide beam metal frame mobile phone antenna, characterized in that: The wide beam metal frame mobile phone antenna comprises a metal frame; The metal frame is provided with a plurality of opening gaps and a plurality of short-circuit posts, and each of the opening gaps divides the metal frame into a plurality of frame components; The frame component between a part of the opening slot and an adjacent opening slot, and the frame component between another part of the opening slot and the short-circuit post are used as monopole antennas respectively; At least a portion of each of the monopole antennas is located on the same straight line.

2. The wide beam metal frame mobile phone antenna according to claim 1, characterized in that: The shape of the metal frame is a rectangle; The plurality of opening gaps include a first opening gap, a second opening gap and a third opening gap; The first opening gap is located on a first side of the metal frame, and the second opening gap and the third opening gap are located on a second side of the metal frame; the first side and the second side are two adjacent sides.

3. The wide beam metal frame mobile phone antenna according to claim 2, characterized in that: The frame component between the first opening slot and the second opening slot is used as a first monopole antenna; The frame component between the second opening slot and the third opening slot is used as a second monopole antenna; The frame component between the third opening gap and the third short-circuit post is used as a third monopole antenna.

4. The wide beam metal frame mobile phone antenna according to claim 3, characterized in that: The wide beam metal frame mobile phone antenna includes a feeding probe; The feeding probe is connected to the second monopole antenna.

5. The wide beam metal frame mobile phone antenna according to claim 1, characterized in that: The wide beam metal frame mobile phone antenna includes at least one inductor; One end of the inductor is connected to a corresponding one of the monopole antennas; The other end of the inductor is used for connecting with the mainboard.

6. The wide beam metal frame mobile phone antenna according to claim 1, characterized in that: The wide beam metal frame mobile phone antenna includes a plurality of short-circuit posts; One end of each of the short-circuit posts is connected to a corresponding frame component; The other end of each short-circuit column is used for connecting with the main board.

7. The wide beam metal frame mobile phone antenna according to any one of claims 1 to 6, characterized in that: At least part of the open gaps are filled with filling material to form closed gaps.

8. The wide beam metal frame mobile phone antenna according to claim 7, characterized in that: The filling material is a material with low electrical conductivity.

9. The wide beam metal frame mobile phone antenna according to claim 7, characterized in that: The melting point of the filling material is lower than the melting point of the metal frame.

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