Antenna module and electronic device including same

Abstract

An antenna module according to an embodiment of the present invention includes a first radiating portion and a second radiating portion to which current is applied via at least one feeder line, a first coupling radiating portion spaced a predetermined distance from the first radiating portion and coupled to the first radiating portion, and a second coupling radiating portion spaced a predetermined distance from the second radiating portion and coupled to the second radiating portion, wherein the first radiating portion and the second radiating portion radiate signals in different frequency bands.

Description

[Technical field]

[0001] The present invention relates to an antenna module, and more particularly to an antenna module capable of overcoming radiation space limitations by using a coupling radiator, and an electronic device including the same. [Background technology]

[0002] In recent years, TVs have become thinner, and the space between the TV and the wall is gradually decreasing. The thinner the TV is and the closer it is to the wall, the more spatial restrictions there are on radiation between the TV and the wall, especially when the TV is hung on the wall. As a result, as the distance between the back of the metal plate of the TV and the wireless (antenna) module that communicates with the TV and the outside world is reduced (conventional: 15mm → Slim TV: 5mm), radiation degradation can occur. At the conventional 15mm, the metal plate does not have a large effect, but at a distance of 5mm, radiation current formation is not smooth and radiation is not possible. In addition, as the distance between the wireless module and the concrete wall is also reduced (conventional: 15mm → Slim TV: 5mm), radiation degradation can occur. Conventional TVs can be used on stands or wall-mounted TVs with a thickness of 50mm or more to ensure sufficient space for radiation, but when the TV is 20mm or less thick, the distance to the wall is only 3mm, so radiation does not occur or most of the radiated electric field is absorbed by the wall. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention provides an antenna module capable of overcoming radiation space limitations by using a coupling radiator, and a wireless module including the antenna module.

[0004] The object of the present invention is not limited to the above-mentioned object, and other object not mentioned will be clearly understood by those skilled in the art of position measurement from the following description. [Means for solving the problem]

[0005] In order to solve the above technical problems, an antenna module according to an embodiment of the present invention includes a first radiating portion and a second radiating portion to which current is applied via at least one feeder line; a first coupling radiating portion spaced a predetermined distance from the first radiating portion and coupled to the first radiating portion; and a second coupling radiating portion spaced a predetermined distance from the second radiating portion and coupled to the second radiating portion, wherein the first radiating portion and the second radiating portion radiate signals in different frequency bands.

[0006] Also, the first coupling radiating part and the second coupling radiating part may be formed to face in one direction.

[0007] Also, the length of the radiating patch of the first radiating portion may be 17.5 to 17.7 mm.

[0008] Also, the length of the radiation patch of the second radiation part may be 17.2 to 17.4 mm.

[0009] Also, the first coupling radiating portion may be formed as a line patch having a predetermined width.

[0010] The length of the line patch may be 31.3 to 31.5 mm.

[0011] Also, the line patch may be formed in a meander line shape.

[0012] Also, the second coupling radiating portion may include: a rectangular patch having a rectangular shape; a first line patch extending from one end of the rectangular patch; and a second line patch extending from the other end of the rectangular patch.

[0013] Also, at least one of the first line patch and the second line patch may be formed in a meander line shape.

[0014] Also, the square patch may be formed with a length of 21.6 to 21.8 mm and a width of 4.9 to 5.1 mm, the length of the first line patch may be 24.25 to 24.45 mm, and the length of the second line patch may be 18.75 to 18.95 mm.

[0015] Also, the first coupling radiator or the second coupling radiator may be formed to have a length such that an isolation between the first coupling radiator and a different coupling radiator is equal to or less than a threshold value.

[0016] Also, the first radiating portion may resonate with the first coupling radiating portion in at least one of a 2.4 to 2.5 GHz band or a 5.0 to 5.2 GHz band.

[0017] Also, the second radiating portion may resonate with the second coupling radiating portion in a 2.4 to 2.5 GHz band.

[0018] Also, one of the first radiator and the second radiator may be a radiator for Wi-Fi, and the other may be a radiator for Bluetooth.

[0019] The antenna may further include a third radiating portion to which a current is applied via at least one power supply line, the third radiating portion being spaced apart from the first radiating portion by a predetermined distance.

[0020] In addition, the radiating patch of the third radiating portion may have a length direction different from that of the radiating patch of the first radiating portion.

[0021] Also, the first radiating portion and the second radiating portion may be formed on a substrate, and the first coupling radiating portion and the second coupling radiating portion may be formed on at least one outer surface of a bracket covering the substrate.

[0022] In order to solve the technical problems, an electronic device according to an embodiment of the present invention includes a substrate; a first radiating portion and a second radiating portion connected to the substrate via at least one power supply line and to which a current is applied; a bracket covering the substrate; a first coupling radiating portion formed on at least one outer surface of the bracket at a predetermined distance from the first radiating portion and coupled to the first radiating portion; and a second coupling radiating portion formed on at least one outer surface of the bracket at a predetermined distance from the second radiating portion and coupled to the second radiating portion. Effect of the Invention

[0023] According to the embodiment of the present invention, the radiation direction of a signal can be directed to a space where radiation is possible by using a coupling antenna. This makes it possible to overcome radiation degradation in a space where the radiation space is restricted. In particular, radiation degradation can be overcome by minimizing the effect of the back distance between a metal plate and an antenna module, and radiation degradation can be overcome by minimizing the effect of distance on a concrete wall.

[0024] The effects of the present invention are not limited to the above-mentioned examples, and more diverse effects are included in the present specification. [Brief description of the drawings]

[0025] [Figure 1] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Diagram 2] 2 is a diagram illustrating a form in which an antenna module is coupled according to an embodiment of the present invention; [Figure 3A] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 3B] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 4A] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 4B]1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Diagram 5] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 6A] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 6B] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 7] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 8] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 9] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 10] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 11] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 12A] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 12B] 1 is a diagram illustrating an antenna module according to an embodiment of the present invention; [Figure 13A] 4 is a diagram illustrating radiation characteristics of an antenna module according to an embodiment of the present invention; [Figure 13B] 4 is a diagram illustrating radiation characteristics of an antenna module according to an embodiment of the present invention; [Figure 14A] 4 is a diagram illustrating radiation characteristics of an antenna module according to an embodiment of the present invention; [Figure 14B] 4 is a diagram illustrating radiation characteristics of an antenna module according to an embodiment of the present invention; [Figure 15] 1 is a diagram illustrating an example in which an antenna module according to an embodiment of the present invention is positioned between a metal plate and a wall surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0027] However, the technical concept of the present invention is not limited to the embodiments described and may be embodied in various different forms, and one or more of the components of the embodiments may be selectively combined or substituted within the scope of the technical concept of the present invention.

[0028] Furthermore, unless otherwise clearly and specifically defined, terms (including technical and scientific terms) used in the embodiments of the present invention shall be interpreted as having a meaning that is commonly understood by a person having ordinary knowledge in the technical field to which the present invention belongs, and commonly used terms such as predefined terms shall be interpreted in light of the contextual meaning of the relevant art.

[0029] Furthermore, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0030] In this specification, the singular can include the plural, unless otherwise specified in the context, and when it is stated that "A and (and) at least one (or more) of B and C" is used, it can include one or more of all possible combinations of A, B, and C.

[0031] In addition, in describing components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. are used to distinguish the components from other components, and the terms do not limit the nature, order, or sequence of the components.

[0032] Furthermore, when a component is described as being 'coupled', 'coupled', or 'connected' to another component, this includes not only the case where the component is directly 'coupled', 'coupled', or 'connected' to the other component, but also the case where the component is 'coupled', 'coupled', or 'connected' by another component between the component and the other component.

[0033] In addition, when described as being formed or disposed "above" or "below" each component, "above" or "below" includes not only the case where two components are in direct contact with each other, but also the case where one or more additional components are formed or disposed between the two components. Furthermore, when described as "above" or "below," it can include not only the upper direction but also the lower direction based on one component.

[0034] FIG. 1 illustrates an antenna module according to an embodiment of the present invention.

[0035] The antenna module 100 according to one embodiment of the present invention includes a first radiating part 110, a second radiating part 120, a first coupling radiating part 130, and a second coupling radiating part 140, and may further include a substrate 210, a bracket 220, a third radiating part 212, and a communication module chip 211.

[0036] The first radiating portion 110 and the second radiating portion 120 receive current through at least one power supply line and radiate signals having different frequency bands.

[0037] More specifically, the first radiating part 110 and the second radiating part 120 may be formed on the substrate 210, and a current may be applied to the first radiating part 110 and the second radiating part 120 via the substrate 210 and at least one power supply line. When a current is applied via the power supply line, the first radiating part 110 and the second radiating part 120 emit a signal having a predetermined frequency band to the outside according to the applied current. The frequency band of the signal radiated from the first radiating part 110 and the frequency band of the signal radiated from the second radiating part 120 may be different from each other. Specific shapes of the first radiating part 110 and the second radiating part 120 will be described in detail later.

[0038] The first coupling radiating unit 130 is spaced apart from the first radiating unit 110 at a predetermined interval and is coupled with the first radiating unit 110 to radiate a signal, and the second coupling radiating unit 140 is spaced apart from the second radiating unit 120 at a predetermined interval and is coupled with the second radiating unit 120 to radiate a signal.

[0039] More specifically, the first coupling radiating portion 130 is formed spaced apart from the first radiating portion 110 at a preset interval. The first coupling radiating portion 130 and the first radiating portion 110 are not connected to each other, and the first coupling radiating portion 130 may not be directly connected to a power source or a ground because it does not include a power supply portion. The first coupling radiating portion 130 may be formed insulated from other components. When a current is applied to the first radiating portion 110, the first coupling radiating portion 130 located at a constant interval is coupled to the first radiating portion 110, and a current flows, thereby radiating a signal. The signal coupled to and radiated from the first coupling radiating portion 130 varies depending on the shape of the first radiating portion 110, the shape of the first coupling radiating portion 130, and the distance between the first radiating portion 110 and the first coupling radiating portion 130.

[0040] The second coupling radiating portion 140 is formed spaced apart from the second radiating portion 120 at a preset interval. The second coupling radiating portion 140 and the second radiating portion 120 are not connected to each other, and the second coupling radiating portion 140 may not be directly connected to a power source or a ground because it does not include a power supply portion. The second coupling radiating portion 140 may be formed insulated from other components. When a current is applied to the second radiating portion 120, the second coupling radiating portion 140 located at a constant interval is coupled to the second radiating portion 120, and a current flows, thereby radiating a signal. The signal coupled to and radiated from the second coupling radiating portion 140 varies depending on the shape of the second radiating portion 120, the shape of the second coupling radiating portion 140, and the interval between the second radiating portion 120 and the second coupling radiating portion 140. The specific shapes of the first coupling radiating portion 130 and the second coupling radiating portion 140 will be described in detail later.

[0041] For various communications, a single antenna module may be formed with a plurality of radiators having various frequency bands. In particular, radiators for Wi-Fi, Bluetooth, GPS, and NFC may be required for short-distance communications. In the case of a smart TV, Wi-Fi and Bluetooth are essential for transmitting and receiving data between the TV and a sharing device or a mobile terminal, and an antenna module having radiators for the corresponding communications is required.

[0042] Either the first radiator 110 or the second radiator 120 may be a radiator for Wi-Fi, and the other may be a radiator for Bluetooth. Alternatively, it may be a radiator for other communication such as an NFC radiator. Here, the first radiator 110 may be a radiator for Wi-Fi. For this, the first radiator 110 may resonate with the first coupling radiator 130 in at least one band of 2.4 to 2.5 GHz band or 5.0 to 5.2 GHz band, which is a Wi-Fi frequency band. The second radiator 120 may be a radiator for Bluetooth. For this, the second radiator 120 may resonate with the second coupling radiator 140 in the Bluetooth frequency band of 2.4 to 2.5 GHz.

[0043] The antenna module 100 according to an embodiment of the present invention may include a substrate 210 and a bracket 220 covering the substrate 210, as shown in FIG. 2. In forming the first radiating part 110, the second radiating part 120, the first coupling radiating part 130, and the second coupling radiating part 140 in the antenna module 100 according to an embodiment of the present invention, the first radiating part 110 and the second radiating part 120 may be formed on the substrate 210, and the first coupling radiating part 130 and the second coupling radiating part 140 may be formed on the bracket 220. The antenna module 100 may be formed by coupling the bracket 220 on which the first coupling radiating part 130 and the second coupling radiating part 140 are formed to the substrate 210 on which the first radiating part 110 and the second radiating part 120 are formed. The substrate 210 may further include a communication module chip 211 or a third radiating part 212. The communication module chip 211 may be a chip including a processor for controlling a signal required for communication to be performed by the antenna module 100. The communication module chip 211 can perform various functions required for communication.

[0044] By forming the first radiating portion 110 and the second radiating portion 120 on the substrate 210 and forming the first coupling radiating portion 130 and the second coupling radiating portion 140 on the bracket 220, the first radiating portion 110 and the first coupling radiating portion 130 can be spaced apart at a fixed interval, and the second radiating portion 120 and the second coupling radiating portion 140 can be spaced apart at a fixed interval. In addition, by forming the first coupling radiating portion 130 and the second coupling radiating portion on the bracket, the first coupling radiating portion 130 and the second coupling radiating portion can be formed not to contact the first radiating portion 110 and the second radiating portion 120, and not to be connected to a power source or a ground.

[0045] Forming the first coupling radiating portion 130 and the second coupling radiating portion 140 on a bracket and spaced apart from the first radiating portion 110 and the second radiating portion 120 or not connected to a power source or ground corresponds to one implementation example, and it goes without saying that the first coupling radiating portion 130 and the second coupling radiating portion 140 can be formed spaced apart from the first radiating portion 110 and the second radiating portion 120 in other forms, just like forming the first coupling radiating portion 130 and the second coupling radiating portion 140 on a substrate other than the bracket 220 and spaced apart from the first radiating portion 110 and the second radiating portion 120.

[0046] The first coupling radiator 130 and the second coupling radiator 140 may be formed in the same direction or in a different direction independent of the radiation direction of the first radiator 110 or the second radiator 120. As described above, the first coupling radiator 130 radiates a signal by being coupled with the first radiator 110, and the second coupling radiator 140 radiates a signal by being coupled with the second radiator 120. At this time, the radiation direction of the first coupling radiator 130 or the second coupling radiator 140 may determine the direction in which the signal is radiated.

[0047] When the radiation direction of the first coupling radiator 130 is formed differently from that of the first radiator 110, the signal coupled and radiated by the first coupling radiator 130 is aligned with the radiation direction of the first coupling radiator 130, and even if a signal is radiated from the first radiator 110, the direction of the signal coupled and radiated can be controlled according to the corresponding signal. For example, even if the radiation direction of the first radiator 110 is formed to face the upper surface of the substrate, the first coupling radiator 130 is formed in a direction perpendicular to the upper surface of the substrate, so that the direction of the signal radiated from the first coupling radiator 130 can be directed to a specific direction. Similarly, the second coupling radiator 140 is also formed in a direction different from that of the first radiator 110, so that the radiation direction of the signal radiated from the second coupling radiator 140 can be directed to a specific direction. The first coupling radiator 130 and the second coupling radiator 140 can be formed on at least one outer surface of the bracket 220 covering the substrate 210. The first radiator 110 and the second radiator 120 are formed on the substrate 210 to radiate signals to the upper surface of the substrate 210, whereas the first coupling radiator 130 and the second coupling radiator 140 are formed on at least one outer surface of the bracket 220, thereby enabling signals to be radiated in a lateral direction. If only the first radiator 110 and the second radiator 120 that radiate signals are formed on the upper surface of the substrate 210, radiation may be difficult if an obstacle or wall is located in the direction of the upper surface of the substrate 210. In this case, by forming the first coupling radiator 130 and the second coupling radiator 140 that radiate signals in a lateral direction, radiation space restrictions that may occur in the direction of the upper surface of the substrate can be overcome.

[0048] Alternatively, the radiation direction of the first coupling radiator 130 or the second coupling radiator 140 may be formed in the same direction as the first radiator 110 and the second radiator 120. When the radiation direction of the first coupling radiator 130 is formed in the same direction as the first radiator 110, a signal coupled and radiated in the first coupling radiator 130 is radiated in the same manner as the signal in the first radiator 110, and the magnitude of the signal radiated in the corresponding direction may be increased.

[0049] The first coupling radiating part 130 and the second coupling radiating part 140 may be formed to face in one direction. If the first radiating part 110 and the second radiating part 120 are formed to radiate in a specific direction, and an obstacle such as a wall is located in the radiation direction and a radiation space is restricted, the first coupling radiating part 130 and the second coupling radiating part 140 may be formed to face in a direction other than the radiation direction of the first radiating part 110 and the second radiating part 120, where there is no restriction in the radiation space.

[0050] Hereinafter, specific examples of the shapes of the first radiating part 110, the second radiating part 120, the first coupling radiating part 130, and the second coupling radiating part 140 will be described.

[0051] The first coupling radiating unit 130 and the second coupling radiating unit 140 are coupled with the first radiating unit 110 and the second radiating unit 120, respectively, to radiate signals, and the coupling characteristic formed between the first coupling radiating unit 130 and the first radiating unit 110 is affected by the distance (D1) between the first coupling radiating unit 130 and the first radiating unit 110, as shown in Fig. 3A. Similarly, the coupling characteristic formed between the second coupling radiating unit 140 and the second radiating unit 120 is affected by the distance (D2) between the second coupling radiating unit 140 and the second radiating unit 120.

[0052] FIG. 3B is a graph showing the reflection loss related to D1 and D2. Here, the reflection loss means the ratio of how much reflection occurs when an electrical signal is radiated based on a specific radiator, and the less reflection, the less loss of the electrical signal is radiated. Therefore, the lower the Y-axis value on the graph, the better the radiation characteristics. Here, the variable range of D1 and D2 is 2.7 to 3.5 mm (unit: 0.1 mm). The reflection loss in the first radiator 110 is as shown in FIG. 3B (A), and the reflection loss in the second radiator 120 is as shown in FIG. 3B (B).

[0053] Considering the reflection loss, it can be confirmed that when the distance between D1 and D2 is 2.7 to 2.9 mm, the resonance in the first radiating part 110 or the second radiating part 120 is distorted and the radiation characteristics are deteriorated, and that resonance occurs when the distance between D1 and D2 is 3.0 to 3.5 mm. The closer the distance between the two radiating parts is, the better the coupling characteristics are, but below a certain distance, the resonance is distorted, so D1 and D2 can be set to 3.0 mm, which is the minimum distance within the range where the resonance coincides. Taking into account the error, D1 and D2 can be set to 2.9 to 3.1 mm.

[0054] The first radiating unit 110 may include a radiating patch, at least one feeding unit, and at least one supporting unit. In an embodiment, as shown in Figs. 4A and 4B, the first radiating unit 110 may include a radiating patch 111, at least one feeding unit 112, and at least one supporting unit 113 to 115. The first radiating unit 110 may include a radiating patch 111 for radiating a signal, and may be connected to the substrate 210 via a feeding unit 112 to which a current is applied from the substrate 210. The radiating patch 111 is formed at a predetermined distance from the substrate 210, and includes supporting units 113 to 115 for supporting the radiating patch 111 formed at a distance from the substrate 210. The components described as the feeding unit and the supporting unit may be configured as a feeding unit or a supporting unit depending on whether they are connected to the feed line of the substrate 210. This may vary depending on the design of the radiating unit.

[0055] The first radiator 110 may be a PIFA antenna. A PIFA (Planar Inverted F Antenna) is a planar inverted F antenna, which means a planar antenna with a smaller square patch plate placed on the ground plane of a planar plate like an inverted F. It may be composed of a ground plane, a radiating patch, a feeding part, and a shorting part (shorting pin or shorting strip). The PIFA antenna serves as a radiating element as the patch resonates with the ground plane by current feeding, and the bandwidth, gain, resonant frequency, etc. may be determined by the length, width, height of the patch, the position of the feeding line, and the position of the shorting pin. The first radiator 110 is not limited to a PIFA antenna, and may be various antennas such as a helical and monopole antenna, and an SMD antenna.

[0056] The characteristics of the first radiating section 110 are affected by the length (D401), width (D410) of the radiating patch 111, the distance (D409) of the radiating patch 111 from the substrate 210, etc., but are particularly affected by the length (D401) of the radiating patch 111.

[0057] FIG. 5 is a graph showing the reflection loss according to the length (D401) of the radiating patch 111. Thus, the length of the radiating patch 111 of the first radiating unit 110 at which resonance with the first coupling radiating unit 130 occurs most frequently at the resonant frequency can be derived and set as the length of the radiating patch 111. Here, the length at which the first radiating unit 110 most frequently resonates with the first coupling radiating unit 130 in the 2.4 to 2.5 GHz band can be determined as the optimal length, and the length of the first radiating unit 110 can be set as the optimal length. By setting the variable range to 14.6 to 17.6 mm (unit length: 1 mm), it can be confirmed that the resonant frequency changes depending on the length, and it can be confirmed that 17.6 mm is the length at which resonance with the first coupling radiating unit 130 occurs most frequently. In consideration of an error, the length of the radiating patch 111 of the first radiating unit 110 can be 17.5 to 17.7 mm. When the length of the radiating patch 111 of the first radiating portion 110 is 17.5 to 17.7 mm, the lengths in FIG. 4B are as follows:

[0058] [Table 1]

[0059] Each length in Table 1 shows the length in one embodiment, and may be changed by the same ratio according to the length of the radiating patch 111 of the first radiating unit 110. In addition, it is natural that the shape or length of each component may be changed according to the design. The second radiating unit 120 may include at least one radiating patch, one feeding unit, and at least one supporting unit. In the embodiment, as shown in Figs. 5A and 5B, the second radiating unit 120 may include radiating patches 121 to 123, at least one feeding unit 124, and at least one supporting unit 125. The radiating patch that radiates a signal may be formed of a first radiating patch 121 parallel to the substrate 210, a second radiating patch 122 perpendicular to the substrate 210, and a third radiating patch 123 perpendicular to the substrate 210 and the first radiating patch 122. Here, the second radiating patch 122 and the third radiating patch 123 can be said to be feeding patches connected to the feeding unit 124 and through which a current flows. The radiating patches 121 to 123 may be connected to the substrate 210 via a power supply unit 124 that receives a current from the substrate 210. The power supply unit 124 and the radiating patch 121 may be connected to each other via a radiating patch 122, and the radiating patch 121 may be formed at a predetermined distance from the substrate 210 and supported by the radiating patches 122 and 123 and a support unit 125. The components described as the power supply unit and the components described as the support unit may be configured as the power supply unit or the support unit depending on whether they are connected to the power supply line of the substrate 210. The radiating patches may also be formed in various shapes and may be changed depending on the design of the radiating unit.

[0060] The second radiating part 120 may also be a PIFA antenna. In addition, the second radiating part 120 is not limited to a PIFA antenna, and may be various antennas such as a helical antenna, a monopole antenna, and an SMD antenna.

[0061] The characteristics of the second radiating part 120 are affected by the length (D601), width (D605) of the radiating patch, the distance (D602) between the radiating patch and the substrate 210, etc., but are particularly affected by the length (D601) of the radiating patch.

[0062] FIG. 7 is a graph showing the reflection loss according to the length (D601) of the radiation patch, and thus, the length of the radiation patch of the second radiating part 120 at which resonance with the second coupling radiating part 140 occurs most frequently at the resonance frequency can be derived and set to the length of the radiation patch. Here, the length at which the second radiating part 120 most frequently resonates with the second coupling radiating part 140 in the 2.4 to 2.5 GHz band can be determined as the optimal length, and the length of the second radiating part 120 can be set to the optimal length. It can be confirmed that the resonance frequency changes depending on the length by setting the variable range to 15.3 to 18.3 mm (unit length: 1 mm), and it can be confirmed that the length at which resonance with the second coupling radiating part 140 occurs most frequently is 17.3 mm (Length=2). Taking into account the error, the length of the radiation patch of the second radiating part 120 can be 17.2 to 17.4 mm.

[0063] When the length of the radiating patch of the second radiating portion 120 is 17.2 to 17.4 mm, the lengths in FIG. 6B are as follows:

[0064] [Table 2]

[0065] The lengths and angles in Table 2 are shown in one embodiment, and may be changed at the same rate according to the length of the radiation patch of the second radiator 120. In addition, it is natural that the shape or length of each component may be changed according to the design. The first coupling radiator 130 may be formed of a line patch 131 as shown in FIG. 8. The first coupling radiator 130 may be formed of a line patch 131 having a line shape, and may be coupled with the first radiator 110 to cause resonance. At this time, the line patch 131 of the first coupling radiator 130 may be formed in a meander line shape. Here, the meander line shape means a curved or meandering shape as shown in FIG. 8, and may be expressed as a zigzag shape. In order to form a line of a certain length in a narrow area, the line patch 131 may be formed in a meander line shape. As a result, a small antenna module may be formed. 9 is a graph showing the reflection loss of the first radiator 110 according to the total length of the line patch 131 of the first coupling radiator 130. Thus, the length of the line patch 131 of the first coupling radiator 110 at which resonance with the first radiator 110 occurs most frequently at the resonance frequency can be derived and set as the length of the line patch 131. Here, the length at which resonance with the first radiator 110 occurs most frequently in the 2.4 to 2.5 GHz band can be determined as the optimal length of the first coupling radiator 130, and the length of the line patch 131 of the first coupling radiator 130 can be set as the optimal length. It can be confirmed that the resonance frequency changes according to the length by setting the variable range to 31.4 to 35.4 mm (unit length: 1 mm), and it can be confirmed that the length at which resonance with the first radiator 110 occurs most frequently is 31.4 mm (Length=1). In consideration of an error, the length of the line patch of the first coupling radiator 130 can be 31.3 to 31.5 mm.

[0066] The second coupling radiating part 140 may include a square patch and at least one line patch, and may be formed of a square patch 141, line patches 142, and 143 as shown in Fig. 8. The square patch 141 may be formed in a square shape, the first line patch 142 may extend from one end of the square patch 141, and the second line patch 143 may extend from the other end of the square patch 141. At least one of the first line patch 142 or the second line patch 143 may be formed in a meander line shape.

[0067] 10 is a graph showing the reflection loss of the second radiating unit 120 according to the total length of the second line patch 143 of the second coupling radiating unit 140, and thus, the length of the line patch of the second coupling radiating unit 140 at which resonance occurs most frequently with the second radiating unit 120 at the resonant frequency can be derived and set as the length of the line patch. Here, the length of the second coupling radiating unit 140 at which resonance occurs most frequently with the second radiating unit 120 in the 2.4 to 2.5 GHz band can be determined as the optimal length, and the length of the second line patch 143 of the second coupling radiating unit 140 can be set to the corresponding length. Here, the square patch 141 is formed with a length of 21.7 mm and a width of 5 mm, the length of the first line patch 142 is 24.35 mm, and the length of the second line patch 143 is set to a variable range of 17.85 to 35.85 mm (unit length: 2 mm), and it can be confirmed that the resonance frequency changes depending on the length, and that the length at which resonance with the second radiating part 120 occurs most frequently is 18.85 mm. Considering the error, the square patch 141 of the second coupling radiating part 140 is formed with a length of 21.6 to 21.8 mm and a width of 4.9 to 5.1 mm, the length of the first line patch 142 is 24.25 to 24.45 mm, and the length of the second line patch 143 can be 18.75 to 18.95 mm.

[0068] When the length of the line patch 131 of the first coupling radiating portion 130 is 31.3 to 31.5 mm, the square patch 141 of the second coupling radiating portion 140 is formed with a length of 21.6 to 21.8 mm and a width of 4.9 to 5.1 mm, the length of the first line patch 142 is 24.25 to 24.45 mm, and the length of the second line patch 143 is 18.75 to 18.95 mm, the lengths of each in FIG. 8 are as follows:

[0069] [Table 3]

[0070] Each length in Table 3 shows the length in one embodiment, and may be changed at the same rate according to the length of the line patch 131 of the first coupling radiator 130 or the length of the second line patch 143 of the second coupling radiator. In addition, it is natural that the shape or length of each component may be changed according to the design. The first coupling radiator 130 or the second coupling radiator 140 may be formed with a length that makes the isolation between different coupling radiators equal to or less than a threshold value. The first coupling radiator 130 is coupled with the first radiator 110, and the second coupling radiator 140 is coupled with the second radiator 120, but when both coupling radiators are coupled, they may affect each other. Therefore, the different coupling radiators may be formed with a length that makes the isolation between them equal to or less than a threshold value so as not to affect each other. Here, the isolation represents the influence between the two radiators, and means the ratio of a signal radiated from one radiator to another radiator, and the lower the isolation, the higher the radiation characteristics. FIG. 11 is a graph showing the separation diagram. As described above, when the length of the line patch 131 of the first coupling radiating portion 130 is 31.3 to 31.5 mm, the square patch 141 of the second coupling radiating portion 140 is formed with a length of 21.6 to 21.8 mm and a width of 4.9 to 5.1 mm, the length of the first line patch 142 is 24.25 to 24.45 mm, and the length of the second line patch 143 is 18.75 to 18.95 mm, it can be seen that the degree of separation is low.

[0071] The antenna module 100 according to the embodiment of the present invention may further include other radiators in addition to the first radiator 110 and the second radiator 120. When the first radiator 110 is a radiator for Wi-Fi, it may further include a third radiator 212 to improve the radiation characteristics of a Wi-Fi signal. The number and shape of the radiators formed in the antenna module 100 may vary depending on the antenna module design.

[0072] The antenna module 100 according to the embodiment of the present invention may include a third radiating portion 212 to which a current is applied via at least one power supply line, and the third radiating portion 212 may be formed to be spaced apart from the first radiating portion 110 at a predetermined interval. The radiating patch of the third radiating portion 212 may have a different length direction from the radiating patch of the first radiating portion 110. As shown in FIG. 2, the third radiating portion 212 may be formed on the substrate 210 in addition to the first radiating portion 110 and the second radiating portion 120, and in this case, the third radiating portion 212 may be a radiating portion for Wi-Fi like the first radiating portion 110. When forming the third radiating portion 212, it may be formed to be spaced apart from the first radiating portion 110 at a predetermined interval, and the radiating patches may be formed to have different length directions to reduce interference between the radiating portions.

[0073] The third radiating portion 212 may include a radiating patch, at least one feeding portion, and at least one supporting portion. In an embodiment, as shown in Figs. 12A and 12B, the third radiating portion 212 may include a radiating patch 1210, at least one feeding portion 1220, and at least one supporting portion 1230, 1240. The third radiating portion 212 may include a radiating patch 1210 that radiates a signal and may be connected to the substrate 210 via a feeding portion 1220 that receives a current from the substrate 210. The radiating patch 1210 may be formed at a predetermined distance from the substrate 210 and may include supporting portions 1230, 1240 for supporting the radiating patch 1210 formed at a distance from the substrate 210. The configuration described as a feeding portion and the configuration described as a supporting portion may be formed as a feeding portion or a supporting portion depending on whether or not they are connected to a feed line of the substrate. This may vary depending on the design of the radiating portion.

[0074] The third radiating portion 212 is a PIFA antenna, and may be one of various antennas such as a helical and monopole antenna, an SMD antenna, etc. The lengths of the third radiating portion 212 in FIG.

[0075] [Table 4]

[0076] Each length in Table 4 shows the length in one embodiment, and it is natural that the shape or length of each component may be changed depending on the design. Figs. 13 to 14 are diagrams for explaining radiation characteristics according to an embodiment of the present invention. Figs. 13 to 14 may be radiation characteristics measured in an environment as shown in Fig. 15. Fig. 15 shows a case where the antenna module 100 is located between a metal plate 1510 and a wall surface 1520, and a radiator formed on the substrate may be formed toward the wall surface 1520. In the case of an antenna including a coupling antenna, the coupling antenna may be formed on a side other than the wall surface 1520.

[0077] Fig. 13A shows the current flow measured at 2.4 GHz when no coupling antenna is included, and it can be seen that radiation is not good due to the large influence of the bottom metal plate 1510 due to the low back distance. In contrast, Fig. 13B shows the current flow measured at 2.4 GHz when the first and second coupling antennas are included, and it can be seen that the current flow is formed on the side, i.e., the area 1310 where the coupling antennas are formed, compared to Fig. 13A. In other words, it can be confirmed that radiation is smoothly performed in the front part of the coupling antenna (the space between the metal plate and the wall surface) by using the coupling antenna to dump the radiation current to the coupling antenna.

[0078] Fig. 14A shows the current flow measured at 5 GHz when the coupling antenna is not included, and shows that the radiation pattern has many null points due to the influence of the wall 1520, and radiation is not performed well. In contrast, Fig. 14B shows the current flow measured at 5 GHz when the first coupling antenna and the second coupling antenna are included, and shows that the current flow is formed on the side, i.e., in the region 1410 where the coupling antennas are formed, compared to Fig. 14A. In other words, it can be confirmed that when a radiation current is induced in the coupling antenna using the coupling antenna, radiation is smoothly performed in the entire area of ​​the coupling antenna (the space between the metal plate and the wall).

[0079] The electronic device according to an embodiment of the present invention includes a substrate, a first radiator and a second radiator connected to the substrate via at least one power supply line and to which a current is applied, a bracket covering the substrate, a first coupling radiator formed on at least one outer surface of the bracket at a predetermined interval from the first radiator and coupled to the first radiator, and a second coupling radiator formed on at least one outer surface of the bracket at a predetermined interval from the second radiator and coupled to the second radiator. A detailed description of an antenna module including the first radiator, the second radiator, the first coupling radiator, and the second coupling radiator included in the electronic device according to an embodiment of the present invention corresponds to the detailed description of the antenna module 100 with reference to FIGS. 1 to 15. The electronic device according to an embodiment of the present invention can be applied to various types of devices having a communication function. For example, the electronic device can be applied to various devices including an antenna module, that is, various devices such as TVs (especially smart TVs), monitors, PDAs, PCs, notebooks, mobile terminals, smart terminals, navigation systems, and various other types of devices including a communication function.

[0080] The electronic device can communicate even when the electronic device is attached to a wall by directing the signal radiation direction to a radiation possible direction using the first radiation unit, the second radiation unit, the first coupling radiation unit, and the second coupling radiation unit. This allows a wall-mounted or wall-attached smart TV to be realized. In addition, the influence of the back distance between the metal plate and the antenna module can be minimized to overcome radiation degradation, and the influence of the distance on a concrete wall can be minimized to overcome radiation degradation.

[0081] As described above, the present invention has been described using specific details such as specific components and limited embodiments and drawings. However, this is provided only to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. Those skilled in the art to which the present invention pertains can make various modifications and variations to the position measurement unit from such descriptions.

[0082] Therefore, the concept of the present invention should not be limited to the described embodiments, and all things that are equivalent or have equivalent modifications to the scope of the claims, as well as the scope of the claims described below, should be considered to fall within the scope of the concept of the present invention.

Claims

1. A first radiating portion and a second radiating portion to which a current is applied via at least one power supply line; a first coupling radiating portion spaced apart from the first radiating portion by a predetermined distance and coupled to the first radiating portion; a second coupling radiating portion that is spaced apart from the second radiating portion by a predetermined distance and is coupled to the second radiating portion; the first radiating portion and the second radiating portion radiate signals in different frequency bands, The first coupling radiation portion is A line patch formed in a meander line shape, The second coupling radiation portion is A quadrilateral patch; a first line patch extending from one end of the square patch; and The antenna module includes a second line patch extending from the other end of the square patch.

2. The antenna module according to claim 1 , wherein the first coupling radiating portion and the second coupling radiating portion are formed to face in one direction.

3. The length of the radiation patch of the first radiation part is 17.5 to 17.7 mm; The antenna module according to claim 1 or 2, wherein the length of the radiating patch of the second radiating portion is 17.2 to 17.4 mm.

4. The first coupling radiation portion is 4. The antenna module according to claim 1, wherein the length of the line patch is 31.3 to 31.5 mm.

5. The second coupling radiation portion, The square patch is formed with a length of 21.6 to 21.8 mm and a width of 4.9 to 5.1 mm, The length of the first line patch is 24.25 to 24.45 mm; The antenna module according to claim 1 , wherein the length of the second line patch is between 18.75 and 18.95 mm.

6. The first coupling radiating portion or the second coupling radiating portion is The antenna module according to claim 1 , wherein the different coupling radiating portions are formed with lengths such that an isolation between the coupling radiating portions is equal to or less than a threshold value.

7. 7. The antenna module according to claim 1, wherein one of the first radiating portion and the second radiating portion is a radiating portion for Wi-Fi, and the other is a radiating portion for Bluetooth.

8. a third radiating portion to which a current is applied via at least one power supply line; The third radiating portion is The antenna module according to claim 1 , wherein the first radiating portion is spaced apart from the first radiating portion by a predetermined distance.

9. The radiation patch of the third radiation unit is The antenna module according to claim 8 , wherein a length direction of the first radiating portion and a length direction of the radiating patch are different from each other.

10. the first radiating portion and the second radiating portion are formed on a substrate, The antenna module of claim 1 , wherein the first coupling radiator and the second coupling radiator are formed on at least one outer surface of a bracket covering a substrate.

11. The first radiating portion is The antenna module according to claim 1 , wherein resonance occurs with the first coupling radiator in at least one of a 2.4 to 2.5 GHz band and a 5.0 to 5.2 GHz band.

12. The second radiating portion is The antenna module according to claim 1 , wherein resonance occurs with the second coupling radiator in a frequency band of 2.4 to 2.5 GHz.

13. A substrate; and 13. An electronic device comprising an antenna module according to any one of claims 1 to 12 disposed on said substrate.

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