Wireless device

Abstract

This wireless device (50) comprises: a first antenna element (61) and a second antenna element (62) that resonate in a first frequency band and a second frequency band, which is a frequency band lower than the first frequency band; a third antenna element (63) and a fourth antenna element (64) that resonate only in the first frequency band among the first frequency band and the second frequency band; and a shielding wall (66), which is a conductive member disposed between the first antenna element (61) and the second antenna element (62). The first antenna element (61) and the second antenna element (62) are arranged in a first direction, the third antenna element (63) and the fourth antenna element (64) are arranged in the first direction, and the first antenna element (61) and the third antenna element (63) are arranged in a second direction perpendicular to the first direction.

Description

Wireless device 【0001】 This disclosure relates to a wireless device. 【0002】 Conventionally, wireless devices connected to electronic devices such as notebook PCs (Personal Computers) and tablet terminals are known (see, for example, Patent Document 1, Patent Document 2, etc.). 【0003】 Also, wireless devices having four antennas are known (see, for example, Patent Document 3, Patent Document 4, etc.). 【0004】 Japanese Patent Publication No. 2010 - 538550, Japanese Patent Application Laid - Open No. 2007 - 266854, Japanese Patent Application Laid - Open No. 2015 - 204497, Japanese Patent Application Laid - Open No. 2015 - 185853 【0005】 This disclosure provides a wireless device including four antenna elements that can achieve miniaturization and isolation of each antenna element. 【0006】 A wireless device according to an aspect of this disclosure includes a first antenna element and a second antenna element that resonate in a first frequency band and a second frequency band that is a frequency band lower than the first frequency band, a third antenna element and a fourth antenna element that resonate only in the first frequency band among the first frequency band and the second frequency band, and a shielding wall that is a conductive member disposed between the first antenna element and the second antenna element. The first antenna element and the second antenna element are arranged in a first direction, the third antenna element and the fourth antenna element are arranged in the first direction, and the first antenna element and the third antenna element are arranged in a second direction perpendicular to the first direction. 【0007】 According to this disclosure, a wireless device including four antenna elements that can achieve miniaturization and isolation of each antenna element can be provided. 【0008】This is a perspective view showing the external appearance of a wireless device according to an embodiment. This is a first perspective view showing the external appearance of a wireless device and electronic equipment according to an embodiment. This is a second perspective view showing the external appearance of a wireless device and electronic equipment according to an embodiment. This is a cross-sectional view showing the internal configuration of a wireless device according to an embodiment. This is a plan view showing the internal configuration of a wireless device according to an embodiment. This is a cross-sectional view showing the internal configuration of the antenna section of the wireless device according to an embodiment. This is a plan view showing the arrangement of each antenna element in a wireless device according to a comparative example. This is a graph showing the isolation between antenna elements of a wireless device according to a comparative example. This is a graph showing the isolation between antenna elements of a wireless device according to an embodiment. This is a graph showing the antenna efficiency of the first antenna element of a wireless device according to a comparative example. This is a graph showing the antenna efficiency of the first antenna element of a wireless device according to an embodiment. This is a graph showing the antenna efficiency of the second antenna element of a wireless device according to a comparative example. This is a cross-sectional view showing the configuration of the first antenna element according to a modified example. 【0009】 The embodiments will be described in detail below with reference to the drawings. 【0010】 The embodiments described below are all general or specific examples. The numerical values, shapes, materials, components, arrangement and connection configurations of components, steps, and the order of steps shown in the following embodiments are examples only and are not intended to limit this disclosure. 【0011】 Furthermore, each figure is a schematic diagram and not necessarily a strictly accurate representation. Also, the same component is denoted by the same reference numeral in each figure. 【0012】 Furthermore, in this specification, terms indicating relationships between elements such as vertical, terms indicating the shape of elements such as plate-like or film-like, and numerical ranges are not expressions that represent only strict meanings, but rather expressions that include substantially equivalent ranges, such as differences of a few percent. 【0013】 (Embodiment) A wireless device according to an embodiment will be described. 【0014】[Overall Configuration] First, the overall configuration of the wireless device and the electronic device to which it is connected according to the embodiment will be described using Figures 1 to 6. Figure 1 is a perspective view showing the external appearance of the wireless device 50 according to the embodiment. Figures 2 and 3 are perspective views showing the external appearance of the wireless device 50 and the electronic device 10 according to the embodiment. Figures 2 and 3 show perspective views of the wireless device 50 before it is connected to the electronic device 10 and after it is connected, respectively. Figure 4 is a cross-sectional view showing the internal configuration of the wireless device 50 according to the embodiment. Figure 4 shows a cross-section of the wireless device 50 along the IV-IV line shown in Figure 3. A part of the second housing 30 of the electronic device 10 is also shown in Figure 4. Figure 5 is a plan view showing the internal configuration of the wireless device 50 according to the embodiment. Figure 5 shows a plan view of the wireless device 50 with the top plate 74 and antenna cover 65 removed. Figure 6 is a cross-sectional view showing the internal configuration of the antenna section 51 provided in the wireless device 50 according to the embodiment. Figure 6 shows a cross-section of the antenna section 51 on the VI-VI line shown in Figure 5. Figure 6 also shows a cross-sectional view of the wireless device 50 with the antenna cover 65 removed. Furthermore, Figure 6 shows the positions of the upper 32 and lower 33 of the second housing 30 with the wireless device 50 connected to the electronic device 10, indicated by dashed lines. 【0015】 Figures 1, 4-6 show the x, y, and z axes perpendicular to each other. The x, y, and z axes are parallel to the first, second, and third directions, respectively, which will be described later. 【0016】 The electronic device 10 is a device to which the wireless device 50 according to the embodiment is connected. The electronic device 10 performs wireless communication using the wireless device 50. As shown in Figure 2, the electronic device 10 has an opening 31 into which the wireless device 50 is inserted. The circuit section 52 of the wireless device 50 is inserted into the opening 31 of the electronic device 10. In this embodiment, the electronic device 10 is a notebook PC. As shown in Figures 2 and 3, the electronic device 10 according to the embodiment comprises a first section 11, a second section 12, and a connection section 13. 【0017】The connecting portion 13 is a member that connects the first portion 11 and the second portion 12. The connecting portion 13 has a first hinge 13a and a second hinge 13b. 【0018】 Part 11 comprises a first housing 14 and a display panel 20. Part 11 may also include other circuit components. These other circuit components may be housed within the first housing 14 or located outside the first housing 14. 【0019】 The first housing 14 is a component that functions as the outer shell of the first part 11. The first housing 14 covers all components of the first part 11 except for the display surface of the display panel 20. The first housing 14 has a rectangular parallelepiped shape. The first housing 14 is rotatably connected to the second housing 30 of the second part 12, centered on the connecting portion 13. This allows the relative position of the first housing 14 with respect to the second housing 30 to be changed. 【0020】 The display panel 20 is a flat display device that displays images. The display panel 20 is located inside the first housing 14. Signal lines for controlling the display panel 20, power lines for supplying power, etc., are connected to the display panel 20 and introduced into the second unit 12 via the connection part 13. 【0021】 The second part 12 includes a second housing 30, a keyboard 17, and a pointing device 18. Furthermore, as shown in Figure 4, the second part 12 has a connector 34 inside the second housing 30 that connects to the connector 78 of the wireless device 50. The second part 12 further includes a processor, a storage device, and the like inside the second housing 30. 【0022】The second housing 30 is a component that functions as the outer shell of the second part 12. The second housing 30 is an example of a conductive housing. In this specification, the configuration of a conductive housing is not limited to a configuration in which the entire housing is formed of a conductive material. For example, the configuration of a conductive housing includes a configuration in which an insulating film is formed on the surface of a component made of a conductive material. The second housing 30 covers the components of the second part 12, excluding the keyboard 17 and the pointing device 18. The second housing 30 has an opening 31 into which the wireless device 50 is inserted. In this embodiment, the opening 31 is formed on the side of the second housing 30. The side of the second housing 30 is the surface connecting the side of the second housing 30 where the keyboard 17 etc. are placed and the back side thereof. At least a part of the second housing 30 is made of a conductive material such as magnesium. The second housing 30 has a rectangular parallelepiped shape. In this embodiment, the second housing 30 has an upper part 32 and a lower part 33. 【0023】 The upper part 32 is the portion of the second housing 30 on which input devices such as the keyboard 17 and the pointing device 18 are arranged. In this embodiment, the upper part 32 has a rectangular plate-shaped top plate and a frame erected on the periphery of the top plate. The upper part 32 may be conductive, and may be formed of a conductive material. 【0024】 The lower part 33 is the portion of the second housing 30 that is located on the back side of the surface on which the keyboard 17 and pointing device 18 are arranged. In this embodiment, the lower part 33 has a rectangular plate-shaped bottom plate and a frame erected on the periphery of the bottom plate. The lower part 33 may be conductive, and may be made of a conductive material. 【0025】 The wireless device 50 according to this embodiment is a device equipped with an antenna for wireless communication. In this embodiment, the wireless device 50 is connected to an electronic device 10. Furthermore, the wireless device 50 is detachably attached to the electronic device 10. In this embodiment, as shown in Figure 1, the wireless device 50 comprises an antenna section 51 and a circuit section 52. 【0026】As shown in Figures 5 and 6, the antenna section 51 includes a first antenna element 61, a second antenna element 62, a third antenna element 63, a fourth antenna element 64, and a shielding wall 66. As shown in Figure 4, the antenna section 51 further includes an antenna cover 65, a first conductive member 68, and a lid 73. As shown in Figure 6, the antenna section 51 further includes a second conductive member 67 and a third conductive member 69. 【0027】 The first antenna element 61 is an antenna that resonates in a first frequency band and a second frequency band which is a lower frequency band than the first frequency band. In this embodiment, the first frequency band is a frequency band of 1.7 GHz or more and 4 GHz or less, and the second frequency band is a frequency band of 600 MHz or more and 900 MHz or less. 【0028】 As shown in Figure 6, the first antenna element 61 has a first main portion 61b that extends in a first direction and faces the third antenna element 63, and a first intersecting portion 61c that is connected to the first end of the first main portion 61b and extends in a direction intersecting the first main portion 61b. Here, intersecting the first main portion 61b means intersecting the plane on which the first main portion 61b extends (here, the zx plane in each figure). In this embodiment, the first antenna element 61 has a first rising portion 61a that is connected to one end of the first main portion 61b in a third direction. The first rising portion 61a extends in a direction intersecting the first main portion 61b. The first antenna element 61 also has a first feed point 61s. The first feed point 61s is located on the first rising portion 61a. In this embodiment, the first antenna element 61 is a monopole antenna. 【0029】 In this embodiment, the first main portion 61b is a plate-like or film-like portion extending in the first and third directions. Here, the third direction is perpendicular to the first and second directions. The longitudinal direction of the first main portion 61b is the first direction. Also, as shown in Figure 6, with the wireless device 50 inserted into the opening 31, in a view from the third direction, the first main portion 61b is located above the upper part 32 of the second housing 30. In other words, in a view from the third direction, the first main portion 61b is located outside the second housing 30. 【0030】 In this embodiment, the first intersection 61c is a plate-like or film-like portion extending in the second and third directions. The first intersection 61c extends in a direction toward the third antenna element 63 from the first main part 61b. The dimensions of the first intersection 61c are smaller than the dimensions of the first main part 61b in the longitudinal direction (i.e., the first direction). With this configuration, in the first antenna element 61, electromagnetic waves in the first frequency band, which is a band with short wavelengths, resonate mainly in the circuit including the first intersection 61c. On the other hand, electromagnetic waves in the second frequency band resonate mainly in the circuit including the first main part 61b. 【0031】 In this embodiment, the first rising portion 61a is a plate-like or film-like portion extending in the first and second directions. The first rising portion 61a extends from the first main portion 61b toward the third antenna element 63. The longitudinal direction of the first rising portion 61a is the first direction. 【0032】 The second antenna element 62 is an antenna that resonates in the first frequency band and the second frequency band, which is a lower frequency band than the first frequency band. The second antenna element 62 is a plate-shaped or film-shaped conductive member that extends in the first and third directions. The second antenna element 62 has a second feed point 62s. The first antenna element 61 and the second antenna element 62 may be different types of antennas. In this embodiment, the second antenna element 62 is an inverted F antenna. The first antenna element 61 and the second antenna element 62 are arranged in the first direction. In other words, the first antenna element 61 and the second antenna element 62 are adjacent to each other in the first direction. 【0033】The third antenna element 63 is an antenna that resonates only in the first frequency band of the two frequency bands. The third antenna element 63 has a third feed point 63s. In this embodiment, the third antenna element 63 is a monopole antenna. More specifically, the third antenna element 63 is a monopole antenna having a portion extending in the first direction. The first antenna element 61 and the third antenna element 63 are arranged in a second direction perpendicular to the first direction (i.e., the y-axis direction in each figure). In other words, the first antenna element 61 and the third antenna element 63 are adjacent in the second direction. The third antenna element 63 extends in a direction along the first main portion 61b of the first antenna element 61. In this embodiment, the third antenna element 63 is a plate-shaped or film-shaped conductive member extending in the first and third directions. 【0034】 In this embodiment, the distance between the first main portion 61b of the first antenna element 61 and the third antenna element 63 is smaller than the length of the first main portion 61b in the first direction (see Figures 5 and 6). Also, as shown in Figure 6, the distance between the third antenna element 63 and the second antenna element 62 in the second direction is smaller than the distance between the third antenna element 63 and the first main portion 61b in the second direction. Furthermore, as shown in Figure 5, the distance d13 between the first feed point 61s and the third feed point 63s in the third direction is 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band. In this specification, the distance between one object and another object refers to the length of the gap formed between the two objects, not the distance between the centers of the two objects. 【0035】 The fourth antenna element 64 is an antenna that resonates only in the first frequency band of the two frequency bands. The fourth antenna element 64 also has a fourth feed point 64s. The third antenna element 63 and the fourth antenna element 64 may be different types of antennas. In this embodiment, the fourth antenna element 64 is an inverted F antenna. 【0036】The third antenna element 63 and the fourth antenna element 64 are arranged in the first direction. In other words, the third antenna element 63 and the fourth antenna element 64 are adjacent to each other in the first direction. In this embodiment, the fourth antenna element 64 is a plate-shaped or film-shaped conductive member that extends in the first and third directions. 【0037】 As shown in Figure 5, the distance d34 between the third feed point 63s and the fourth feed point 64s in the third direction is 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band. 【0038】 The configurations of the first antenna element 61, second antenna element 62, third antenna element 63, and fourth antenna element 64 other than those described above are not particularly limited. The first antenna element 61, second antenna element 62, third antenna element 63, and fourth antenna element 64 may be, for example, conductive films such as copper films formed on a substrate, or plate-shaped conductive members. 【0039】 The shielding wall 66 is a conductive member positioned between the first antenna element 61 and the second antenna element 62. The shielding wall 66 may extend in the second direction from the position of the fourth antenna element 64 in the second direction to the position of the second antenna element 62 in the second direction. The shielding wall 66 may also extend over the entire position of the first antenna element 61 and the second antenna element 62 in the third direction. Furthermore, the shielding wall 66 may extend over the entire position of the fourth antenna element 64 in the third direction. When the wireless device 50 is connected to the electronic device 10, the shielding wall 66 may be electrically connected to the second housing 30 of the electronic device 10. The shielding wall 66 is a plate-shaped member formed of a conductive material such as aluminum or magnesium. 【0040】 The antenna cover 65 is an electrically insulating member that functions as the outer shell of the antenna portion 51. The antenna cover 65 covers the first antenna element 61, the second antenna element 62, the third antenna element 63, and the fourth antenna element 64. The antenna cover 65 has, for example, a rectangular parallelepiped shape. 【0041】The first conductive member 68 is a conductive member disposed within the antenna portion 51. In the embodiment, the first conductive member 68 is a plate-shaped conductive member extending in the first direction and the third direction. As shown in FIG. 6, in the second direction, the first antenna element 61, the second antenna element 62, the third antenna element 63, and the fourth antenna element 64 are disposed on one side (the upper side in FIG. 6) with respect to the first conductive member 68. Further, the first conductive member 68 is electrically connected to the shielding wall 66. In the embodiment, the shielding wall 66 is erected on the first conductive member 68. 【0042】 As shown in FIGS. 5 and 6, the first conductive member 68 has recesses 68b, 68c, 68d. The recesses 68b, 68c, 68d are through-holes penetrating the first conductive member 68. In the example shown in FIGS. 5 and 6, the recesses 68b, 68c, 68d are formed at the ends of the first conductive member 68 in the third direction. The recess 68b is located at a position facing the second antenna element 62, the recess 68c is located at a position facing the third antenna element 63, and the recess 68d is located at a position facing the fourth antenna element 64. Thereby, the influence of the first conductive member 68 on the characteristics of the second antenna element 62, the third antenna element 63, and the fourth antenna element 64 can be suppressed. Each of the recesses 68b, 68c, 68d may be a through-hole formed in the first conductive member 68. 【0043】 As shown in FIG. 6, the distance in the second direction between the first conductive member 68 and the second antenna element 62 is larger than the distance in the second direction between the first conductive member 68 and the fourth antenna element 64. 【0044】 The first conductive member 68 is, for example, a plate-shaped member formed of a conductive material such as aluminum or magnesium. 【0045】 The second conductive member 67 is a conductive member erected on the first conductive member 68. In the embodiment, the second conductive member 67 is disposed between the first intersection portion 61c of the first antenna element 61 and the first conductive member 68, and is a conductive member extending in the second direction and the third direction. The second conductive member 67 is, for example, a plate-shaped member formed of a conductive material such as aluminum or magnesium. 【0046】 The third conductive member 69 is a conductive member erected on the first conductive member 68. In the embodiment, the third conductive member 69 is disposed between the second antenna element 62 and the first conductive member 68 and is a conductive member extending in the second direction. The third conductive member 69 may support the second antenna element 62. The third conductive member 69 is, for example, a columnar member formed of a conductive material such as aluminum or magnesium. 【0047】 The lid portion 73 shown in FIGS. 4 and 5 is a conductive member disposed at the opening 31 of the electronic device 10 and electrically connected to the second housing 30. The lid portion 73 may cover 70% or more of the area of the opening 31 in the third direction view, or may cover 80% or more. In the embodiment, the lid portion 73 is erected on the first conductive member 68. The lid portion 73 is, for example, a plate-like member formed of a conductive material such as aluminum or magnesium. 【0048】 The circuit portion 52 of the wireless device 50 shown in FIGS. 1, 2, and 4 is a portion including a circuit that performs signal processing for wireless communication. As shown in FIGS. 2 and 4, the circuit portion 52 is inserted into the opening 31 of the second housing 30 of the electronic device 10. As shown in FIG. 4, the circuit portion 52 includes a housing portion 71, a top plate 74, a grounding portion 72, a circuit board 75, and a communication circuit 76. As shown in FIG. 5, the circuit portion 52 further includes a first conductor 61w, a second conductor 62w, a third conductor 63w, and a fourth conductor 64w. A part of the first conductor 61w, the second conductor 62w, the third conductor 63w, and the fourth conductor 64w may be disposed in the antenna portion 51. 【0049】The housing section 71 is an example of a component that constitutes part of the housing that forms the outer shell of the circuit section 52. In this embodiment, the housing section 71 and the top plate 74 constitute the housing. The housing section 71 houses the communication circuit 76 and the like. In this embodiment, as shown in Figure 4, the housing section 71 has an opening at the top, and the top plate 74 is placed in this opening. In addition to the communication circuit 76, the housing section 71 houses the circuit board 75, the connector 78, the first conductor 61w, the second conductor 62w, the third conductor 63w, and part of the fourth conductor 64w. Part of the cover 73 of the antenna section 51 may also be housed in the housing section 71. Furthermore, in this embodiment, the housing section 71 is conductive. 【0050】 The top plate 74 is an example of a component that constitutes part of the housing that forms the outer shell of the circuit section 52. In this embodiment, the top plate 74 is a plate-shaped member that is placed in the opening of the housing section 71. 【0051】 The grounding portion 72 shown in Figure 4 is a conductive member that is electrically connected to the second housing 30 of the electronic device 10 when the wireless device 50 is inserted into the opening 31 of the electronic device 10. In this embodiment, the grounding portion 72 is positioned on the outer surface of the housing portion 71 and is in direct contact with the second housing 30. The grounding portion 72 is electrically connected to the lid portion 73, the first conductive member 68, the second conductive member 67, the third conductive member 69, and the shielding wall 66 via the housing portion 71. 【0052】 The grounding portion 72 shown in Figure 4 is in contact with the end face of the opening 31 of the electronic device 10. In this way, the grounding portion 72 is grounded by contacting the end face of the opening 31, which is maintained at ground potential. The end face of the grounding portion 72 is grounded intermittently in the first direction to at least the entire surface of the lower end of the opening 31 in the first direction, or at a narrow pitch of 1 / 15 or less of the wavelength corresponding to the lower limit frequency of the first frequency band. The grounding portion 72 may be positioned not only at the position corresponding to the lower end of the opening 31, but also at the position corresponding to the upper end of the opening 31, or it may be positioned only at the position corresponding to the upper end of the opening 31. When a wireless device 50 that is detachably attached to the electronic device 10 is mounted on the electronic device 10, a conductive gasket or a spring-structured member made of a conductive material may be used as the grounding portion 72 to ensure conductivity between the wireless device 50 and the electronic device 10. 【0053】 The circuit board 75 is a board on which the communication circuit 76 is mounted. The circuit board 75 is placed in the housing section 71. In this embodiment, a connector 78 is mounted on the circuit board 75. The circuit board 75 has a plurality of wires that electrically connect the communication circuit 76 and the connector 78. 【0054】 The communication circuit 76 is a circuit that performs signal processing for wireless communication. In this embodiment, the communication circuit 76 is a circuit for performing wireless communication via each antenna of the antenna unit 51. The communication circuit 76 transmits and receives signals via each antenna. In this embodiment, the communication circuit 76 transmits a wireless signal corresponding to a signal input from the electronic device 10 via the connector 78 via each antenna, and receives the wireless signal via each antenna, and transmits a signal corresponding to the wireless signal to the electronic device 10. 【0055】 Connector 78 is a component that connects to other connectors. In this embodiment, connector 78 is connected to connector 34 provided on the electronic device 10. This allows the wireless device 50 and the electronic device 10 to send and receive signals via connector 78 and connector 34. Connector 78 is mounted on the circuit board 75. 【0056】 The first conductor 61w is a conductor that connects the communication circuit 76 and the first antenna element 61. The first conductor 61w is connected to the first feed point 61s of the first antenna element 61. The first conductor 61w transmits the high-frequency signal received by the first antenna element 61 to the communication circuit 76 and transmits the high-frequency signal output from the communication circuit 76 to the first antenna element 61. For example, a coaxial cable can be used as the first conductor 61w. 【0057】 The second conductor 62w connects the communication circuit 76 to the second antenna element 62. The second conductor 62w is connected to the second feed point 62s of the second antenna element 62. The second conductor 62w transmits the high-frequency signal received by the second antenna element 62 to the communication circuit 76 and transmits the high-frequency signal output from the communication circuit 76 to the second antenna element 62. For example, a coaxial cable can be used as the second conductor 62w. 【0058】The third conductor 63w is a conductor that connects the communication circuit 76 and the third antenna element 63. The third conductor 63w is connected to the third feed point 63s of the third antenna element 63. The third conductor 63w transmits the high-frequency signal received by the third antenna element 63 to the communication circuit 76 and transmits the high-frequency signal output from the communication circuit 76 to the third antenna element 63. For example, a coaxial cable can be used as the third conductor 63w. 【0059】 The fourth conductor 64w is a conductor that connects the communication circuit 76 and the fourth antenna element 64. The fourth conductor 64w is connected to the fourth feed point 64s of the fourth antenna element 64. The fourth conductor 64w transmits the high-frequency signal received by the fourth antenna element 64 to the communication circuit 76 and transmits the high-frequency signal output from the communication circuit 76 to the fourth antenna element 64. For example, a coaxial cable can be used as the fourth conductor 64w. 【0060】 [Effects, etc.] The effects of the wireless device 50 according to the embodiment will be described. 【0061】 As described above, the wireless device 50 according to the embodiment includes a first antenna element 61 and a second antenna element 62 that resonate in a first frequency band and a second frequency band which is a lower frequency band than the first frequency band, a third antenna element 63 and a fourth antenna element 64 that resonate only in the first frequency band of the first and second frequency bands, and a shielding wall 66 which is a conductive member disposed between the first antenna element 61 and the second antenna element 62. The first antenna element 61 and the second antenna element 62 are arranged in a first direction, the third antenna element 63 and the fourth antenna element 64 are arranged in a first direction, and the first antenna element 61 and the third antenna element 63 are arranged in a second direction perpendicular to the first direction. 【0062】As described above, the wireless device 50 according to this embodiment has four antenna elements. In the wireless device 50, a shielding wall 66 made of a conductive material is placed between the first antenna element 61 and the second antenna element 62, which resonate in the first frequency band and the second frequency band, respectively. This allows interference between the first antenna element 61 and the second antenna element 62 to be suppressed without increasing the distance between them. In other words, the wireless device 50 can be miniaturized, and isolation of the first antenna element 61 and the second antenna element 62 can be achieved. 【0063】 Furthermore, in the wireless device 50, the first antenna element 61 has a first main portion 61b that extends in a first direction and faces the third antenna element 63, and a first intersecting portion 61c that is connected to the end of the first main portion 61b in the first direction and extends in a direction intersecting the first main portion 61b. The third antenna element 63 may extend in a direction along the first main portion 61b. 【0064】 Thus, by having a first intersection portion 61c that extends in a direction intersecting the first main portion 61b and the third antenna element 63 of the first antenna element 61, the direction of electromagnetic wave resonance in the first frequency band of the first antenna element 61 (i.e., the direction of the current associated with resonance) and the direction of electromagnetic wave resonance in the first frequency band of the third antenna element 63 can be made to intersect. Therefore, interference between the first antenna element 61 and the third antenna element 63 in the first frequency band can be suppressed without increasing the distance between the first antenna element 61 and the third antenna element 63. In other words, miniaturization of the wireless device 50 and isolation of the first antenna element 61 and the third antenna element 63 can be achieved. 【0065】 In this embodiment, the first intersection 61c extends in a direction that also intersects with the fourth antenna element 64. Therefore, interference between the first antenna element 61 and the fourth antenna element 64 can be suppressed. 【0066】Furthermore, in this embodiment, for the third antenna element 63 and the fourth antenna element 64, which resonate only in the first frequency band with a short wavelength, the positions of the third feed point 63s and the fourth feed point 64s are different in the first and third directions, respectively, and a first conductive member 68 is arranged between the third feed point 63s and the fourth feed point 64s. As a result, interference between the third antenna element 63 and the fourth antenna element 64 can be suppressed even if the distance between them is relatively short. 【0067】 As described above, the wireless device 50 according to the embodiment makes it possible to achieve miniaturization and isolation of each antenna. 【0068】 Here, the effects of the wireless device 50 according to the embodiment will be explained using Figures 7 to 13, in comparison with the wireless device according to the comparative example. 【0069】 Figure 7 is a plan view showing the arrangement of each antenna element in the wireless device according to the comparative example. A portion of the second housing 30 to which the wireless device according to the comparative example is connected is also shown in Figure 7. Figures 8 and 9 are graphs showing the isolation between the antenna elements of the wireless devices according to the comparative example and the embodiment, respectively. 【0070】 Figures 10 and 11 are graphs showing the antenna efficiency of the first antenna element 61 of each wireless device according to the comparative example and the embodiment, respectively. In Figures 10 and 11, the antenna efficiency of the first antenna element 61 alone is shown by a short dashed line, the antenna efficiency of the first antenna element 61 when considering the coupling of the first antenna element 61 and the second antenna element 62 is shown by a solid line, and the antenna efficiency of the first antenna element 61 when considering the coupling of all antenna elements is shown by a long dashed line. 【0071】Figures 12 and 13 are graphs showing the antenna efficiency of the second antenna element 62 of each wireless device according to the comparative example and embodiment, respectively. In Figures 12 and 13, the antenna efficiency of the second antenna element 62 alone is shown by a short dashed line, the antenna efficiency of the second antenna element 62 when considering the coupling of the second antenna element 62 with the first antenna element 61 is shown by a solid line, and the antenna efficiency of the second antenna element 62 when considering the coupling of all antenna elements is shown by a long dashed line. 【0072】 The horizontal axes in Figures 8 to 13 represent frequency. The graphs in Figures 8 to 13 show the results obtained from simulations. 【0073】 As shown in Figure 7, the comparative example wireless device includes a first antenna element 61, a second antenna element 62, a third antenna element 63, and a fourth antenna element 64, similar to the wireless device 50 according to the embodiment. In the comparative example wireless device, the spacing between each antenna element is wider than the spacing between each antenna element in the embodiment. In the comparative example wireless device, as shown in Figure 7, each antenna element is arranged at the four corners of a region where the length d1 in the first direction is approximately 125 mm and the length d3 in the third direction is approximately 100 mm. In the embodiment wireless device 50, each antenna element is arranged in a region where the length in the first direction is approximately 125 mm and the length in the third direction is approximately 25 mm. 【0074】 In the comparative example wireless device, no shielding wall 66 is placed between the first antenna element 61 and the second antenna element 62. Also, in the comparative example wireless device, the first main portion 61b of the first antenna element 61 does not face the third antenna element 63. Furthermore, the first intersection portion 61c of the first antenna element 61 extends in the direction in which the third antenna element 63 extends, rather than in the direction in which it intersects with the third antenna element 63. 【0075】The isolation between antenna elements of the wireless device according to the comparative example having such a configuration and the wireless device 50 according to the embodiment will be compared with reference to Figures 8 and 9. In Figures 8 and 9, for example, "61-62" indicates the isolation between the first antenna element 61 and the second antenna element 62, and "62-64" indicates the isolation between the second antenna element 62 and the fourth antenna element 64. As shown in Figures 8 and 9, the wireless device 50 according to the embodiment has higher isolation performance (i.e., less interference between antenna elements) than the wireless device according to the comparative example, especially in the low frequency band (the region of approximately 2 GHz or less). 【0076】 Thus, the wireless device 50 according to this embodiment achieves miniaturization and isolation of each antenna element compared to the wireless device according to the comparative example. 【0077】 Next, the antenna efficiency of each antenna element will be explained using Figures 10 to 13. 【0078】 As shown in Figures 11 and 13, the first antenna element 61 and the second antenna element 62 of the wireless device 50 according to the embodiment achieve sufficient antenna efficiency in the first frequency band (1.7 GHz to 4 GHz) and the second frequency band (0.6 GHz to 0.9 GHz). Furthermore, since isolation between the antenna elements is achieved in the first antenna element 61 and the second antenna element 62 of the wireless device 50 according to the embodiment, there is no significant change in antenna efficiency whether used individually or when coupled with other antenna elements. 【0079】 In contrast, as shown in Figures 10 and 12, the first antenna element 61 and the second antenna element 62 of the wireless device in the comparative example show a relatively large difference in antenna efficiency between the case of a single element and the case where coupling with other antenna elements is considered. 【0080】For example, as shown in Figure 10, the antenna efficiency of the first antenna element 61 of the comparative example in the frequency band including the second frequency band is reduced by about 1.5 dB compared to the case of the element alone, when considering coupling with other antenna elements. Also, as shown in Figure 12, the antenna efficiency of the second antenna element 62 of the comparative example in the frequency band including the second frequency band is reduced by about 3 dB compared to the case of the element alone, when considering coupling with other antenna elements. 【0081】 Furthermore, the wireless device 50 may be detachably attached to the electronic device 10. 【0082】 This allows the wireless device 50 to be attached or detached depending on whether wireless communication is required. Furthermore, if the wireless device 50 malfunctions, it can be easily replaced. 【0083】 Furthermore, the electronic device 10 to which the wireless device 50 is connected may have a conductive second housing 30. The second housing 30 may have an opening 31 into which the wireless device 50 is inserted. The wireless device 50 may further include a conductive grounding portion 72 and a conductive cover portion 73, which are arranged in the opening 31 and electrically connected to the second housing 30. 【0084】 An opening 31 formed in such a conductive second housing 30 can function as an antenna. Therefore, the characteristics of each antenna element of the wireless device 50 may be adversely affected. In this embodiment, a conductive cover 73 electrically connected to the second housing 30 is placed over the opening 31, thereby blocking at least a portion of the opening 31. This suppresses the function of the opening 31 as an antenna. Consequently, it is possible to suppress adverse effects from the opening 31 on the characteristics of each antenna element of the wireless device 50. 【0085】 Furthermore, in this embodiment, with the wireless device 50 inserted into the opening 31, the first main part 61b may be located outside the second housing 30 in a view from a third direction. 【0086】 This reduces the shielding of the first antenna element 61 by the second housing 30. Therefore, the influence of the second housing 30 on the antenna characteristics of the first antenna element 61 can be reduced. 【0087】 Furthermore, the distance between the third antenna element 63 and the second antenna element 62 in the second direction may be smaller than the distance between the third antenna element 63 and the first main portion 61b of the first antenna element 61 in the second direction. 【0088】 In this way, by making the positions of the first main part 61b and the second antenna element 62 different in the second direction, the distance between the first main part 61b and the second antenna element 62 can be increased. Therefore, the isolation performance between the first antenna element 61 and the second antenna element 62 can be further improved. 【0089】 Furthermore, the shielding wall 66 may extend in the second direction from the position of the fourth antenna element 64 in the second direction to the position of the second antenna element 62 in the second direction. 【0090】 This further enhances the isolation performance between the second antenna element 62 and the first antenna element 61 and the fourth antenna element 64. 【0091】 Furthermore, the wireless device 50 may further include a conductive first conductive member 68. In the second direction, a first antenna element 61, a second antenna element 62, a third antenna element 63, and a fourth antenna element 64 may be arranged on one side of the first conductive member 68. 【0092】 By providing such a first conductive member 68, it is possible to suppress the propagation of electromagnetic waves generated by each antenna element beyond the first conductive member 68. Therefore, when the wireless device 50 is used near the human body, the amount of electromagnetic wave absorption by the human body can be reduced by placing the first conductive member 68 between the human body and each antenna element. 【0093】 Furthermore, the distance between the first conductive member 68 and the second antenna element 62 in the second direction is greater than the distance between the first conductive member 68 and the fourth antenna element 64 in the second direction. 【0094】In the second antenna element 62, longer wavelength electromagnetic waves resonate than those of the fourth antenna element 64, making it susceptible to the influence of conductive members placed near it on its antenna characteristics. As in the embodiment, increasing the distance between the second antenna element 62 and the first conductive member 68 reduces the influence of the first conductive member 68 on the antenna characteristics of the second antenna element 62. 【0095】 Furthermore, the distance d13 between the first feed point 61s and the third feed point 63s in the third direction may be 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band. 【0096】 In this way, by increasing the distance d13 between the first feed point 61s and the third feed point 63s, interference between the first antenna element 61 and the third antenna element 63 can be suppressed. Therefore, the isolation performance between the first antenna element 61 and the third antenna element 63 can be further improved. 【0097】 Furthermore, the first antenna element 61 may have a first rising portion 61a connected to one end of the first main portion 61b in a third direction. The first rising portion 61a extends in a direction intersecting the first main portion 61b, and the first feed point 61s may be located on the first rising portion 61a. 【0098】 In this way, the first antenna element 61 is equipped with a first rising portion 61a, and the first feed point 61s is positioned on the first rising portion 61a, which allows the electromagnetic wave resonance in the first antenna element 61 to be generated in a direction intersecting with the first main portion 61b and the third antenna element 63. Therefore, the isolation performance between the first antenna element 61 and the third antenna element 63 can be further improved. 【0099】 Furthermore, the distance d34 between the third feeding point 63s and the fourth feeding point 64s in the third direction may be 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band. 【0100】 This further enhances the isolation performance between the third antenna element 63 and the fourth antenna element 64. 【0101】Furthermore, the third antenna element 63 may be a monopole antenna having a portion extending in the first direction. 【0102】 As a result, the electromagnetic waves resonate in the first direction at the third antenna element 63, making it possible to make the resonance direction of the third antenna element 63 intersect with the resonance direction at the first intersection 61c of the first antenna element 61. Therefore, the isolation performance between the first antenna element 61 and the third antenna element 63 can be further improved. 【0103】 Furthermore, the first antenna element 61 and the second antenna element 62 may be different types of antennas. For example, the first antenna element 61 may be a monopole antenna, and the second antenna element 62 may be an inverted F antenna. 【0104】 This further enhances the isolation performance between the first antenna element 61 and the second antenna element 62. 【0105】 Furthermore, the third antenna element 63 and the fourth antenna element 64 may be different types of antennas. For example, the third antenna element 63 may be a monopole antenna, and the fourth antenna element 64 may be an inverted F antenna. 【0106】 This further enhances the isolation performance between the third antenna element 63 and the fourth antenna element 64. 【0107】 Furthermore, the distance between the first main portion 61b of the first antenna element 61 and the third antenna element 63 may be smaller than the length of the first main portion 61b in the first direction. 【0108】 This makes it possible to miniaturize the wireless device 50. 【0109】 Furthermore, the first frequency band may be a frequency band of 1.7 GHz or higher and 4 GHz or lower, and the second frequency band may be a frequency band of 600 MHz or higher and 900 MHz or lower. 【0110】 This allows the wireless device 50 to be used, for example, in a fifth-generation mobile communication system. 【0111】(Modifications, etc.) The present disclosure has been described above based on the embodiments described above, but the present disclosure is not limited to the embodiments described above. Various modifications to the above embodiments that a person skilled in the art can conceive of may also be included within the scope of the present disclosure, as long as they do not deviate from the spirit of the present disclosure. 【0112】 For example, the configuration of each antenna element according to this disclosure is not limited to the configuration shown in the above embodiment. As an example, a modified example of the first antenna element will be described with reference to Figure 14. Figure 14 is a cross-sectional view showing the configuration of the first antenna element 161 according to the modified example. Figure 14 shows a cross-section of the first antenna element 161 at the same position as in Figure 4. 【0113】 As shown in Figure 14, the first antenna element 161 may have a first opposing portion 61d in addition to the first rising portion 61a, the first main portion 61b, and the first intersecting portion 61c. The first opposing portion 61d is the portion connected to the other end of the first main portion 61b in the third direction (i.e., the end opposite to the end to which the first rising portion 61a is connected). The first opposing portion 61d faces the first rising portion 61a. The first opposing portion 61d extends in a direction intersecting the first main portion 61b. The first opposing portion 61d extends in a direction approaching the third antenna element 63 from the first main portion 61b. Even when the wireless device 50 according to the embodiment is equipped with the modified first antenna element 161 instead of the first antenna element 61, the same effects as those of the wireless device 50 described above are achieved. 【0114】 Furthermore, the configuration of each antenna element according to this disclosure is not limited to the configuration shown in the above embodiment. In the above embodiment, an example was shown in which the first antenna element 61 is a monopole antenna, but other types of antennas may also be used. For example, the first antenna element 61 may be an inverted F antenna. 【0115】 Furthermore, although the above embodiment shows an example where the second antenna element 62 is an inverted F antenna, other types of antennas may also be used. For example, the second antenna element 62 may be a monopole antenna. 【0116】Furthermore, although the above embodiment shows an example where the third antenna element 63 is a monopole antenna, other types of antennas may also be used. For example, the third antenna element 63 may be an inverted F antenna. 【0117】 Furthermore, although the above embodiment shows an example where the fourth antenna element 64 is an inverted F antenna, other types of antennas may also be used. For example, the fourth antenna element 64 may be a monopole antenna. 【0118】 Furthermore, in the above embodiment, the wireless device 50 was a separate device from the electronic device 10, but it may be part of the electronic device 10, or it may not be detachably attached to the electronic device 10. 【0119】 Furthermore, in the above embodiment, the electronic device 10 was a notebook PC, but it may be an electronic device other than a notebook PC. For example, the electronic device 10 may be a tablet terminal, a smartphone, or the like. 【0120】 Furthermore, this disclosure also includes forms that can be realized by arbitrarily combining the components and functions of each embodiment, without departing from the spirit of this disclosure. 【0121】 (Note) In addition, the following technologies are disclosed based on the above description. 【0122】 (Technical 1) A wireless device comprising: a first antenna element and a second antenna element that resonate in a first frequency band and a second frequency band which is a frequency band lower than the first frequency band; a third antenna element and a fourth antenna element that resonate only in the first frequency band among the first and second frequency bands; and a shielding wall which is a conductive member disposed between the first antenna element and the second antenna element, wherein the first antenna element and the second antenna element are arranged in a first direction, the third antenna element and the fourth antenna element are arranged in the first direction, and the first antenna element and the third antenna element are arranged in a second direction perpendicular to the first direction. 【0123】(Technology 2) The wireless device according to Technology 1, wherein the first antenna element has a first main portion that extends in the first direction and faces the third antenna element, and a first crossing portion that is connected to the end of the first main portion in the first direction and extends in a direction that intersects with the first main portion, and the third antenna element extends in a direction along the first main portion. 【0124】 (Technical 3) The wireless device according to Technical 2, wherein the wireless device is connected to an electronic device, and the electronic device uses the wireless device to perform wireless communication. 【0125】 (Technical 4) The wireless device according to Technical 3, wherein the wireless device is detachably attached to the electronic device. 【0126】 (Technical 5) The wireless device according to Technical 3 or 4, wherein the electronic device has a conductive housing, the housing has an opening into which the wireless device is inserted, and the wireless device further comprises a conductive ground portion and a conductive cover portion disposed in the opening and electrically connected to the housing. 【0127】 (Technical 6) The electronic device has a conductive housing, the housing has an opening into which the wireless device is inserted, and the first main part is located outside the housing in a third view perpendicular to the first and second directions when the wireless device is inserted into the opening, according to any one of Technical 3 to 5. 【0128】 (Technical 7) A wireless device according to any one of Technical 2 to 6, wherein the distance between the third antenna element and the second antenna element in the second direction is smaller than the distance between the third antenna element and the first main part in the second direction. 【0129】 (Technical 8) The shielding wall extends in the second direction from the position of the fourth antenna element in the second direction to the position of the second antenna element in the second direction, as described in any one of Technical 1 to 7. 【0130】(Technical 9) A wireless device according to any one of Technical 1 to 8, further comprising a conductive first conductive member, wherein the first antenna element, the second antenna element, the third antenna element, and the fourth antenna element are arranged on one side with respect to the first conductive member in the second direction. 【0131】 (Technical 10) The wireless device according to Technical 9, wherein the distance between the first conductive member and the second antenna element in the second direction is greater than the distance between the first conductive member and the fourth antenna element in the second direction. 【0132】 (Technical 11) A wireless device according to any one of Technical 2 to 7, wherein the first antenna element has a first feed point, the second antenna element has a second feed point, the third antenna element has a third feed point, the fourth antenna element has a fourth feed point, and the distance between the first feed point and the third feed point in a third direction perpendicular to the first and second directions is 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band. 【0133】 (Technical 12) The wireless device according to Technical 11, wherein the first antenna element has a first rising portion connected to one end of the first main portion in the third direction, the first rising portion extends in a direction intersecting the first main portion, and the first feed point is located on the first rising portion. 【0134】 (Technical 13) A wireless device according to any one of Technical 1 to 12, wherein the first antenna element has a first feed point, the second antenna element has a second feed point, the third antenna element has a third feed point, the fourth antenna element has a fourth feed point, and the distance between the third feed point and the fourth feed point in a third direction perpendicular to the first and second directions is 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band. 【0135】 (Technical 14) The wireless device according to any one of Technical 1 to 13, wherein the third antenna element is a monopole antenna having a portion extending in the first direction. 【0136】(Technical 15) A wireless device according to any one of Technical 1 to 14, wherein the first antenna element and the second antenna element are antennas of different types. 【0137】 (Technical 16) The wireless device according to Technical 15, wherein the first antenna element is a monopole antenna and the second antenna element is an inverted F antenna. 【0138】 (Technical 17) A wireless device according to any one of Technical 1 to 16, wherein the third antenna element and the fourth antenna element are antennas of different types. 【0139】 (Technical 18) The wireless device according to Technical 17, wherein the third antenna element is a monopole antenna and the fourth antenna element is an inverted F antenna. 【0140】 (Technical 19) A wireless device according to any one of Technical 2 to 7, wherein the distance between the first main part and the third antenna element is smaller than the length of the first main part in the first direction. 【0141】 (Technical 20) A wireless device according to any one of Technical 1 to 19, wherein the first frequency band is a frequency band of 1.7 GHz or more and 4 GHz or less, and the second frequency band is a frequency band of 600 MHz or more and 900 MHz or less. 【0142】 The wireless device of this disclosure can be used, for example, as a small wireless device used for wireless communication in electronic devices such as notebook PCs. 【0143】10 Electronic device 11 Part 1 12 Part 2 13 Connection part 13a First hinge 13b Second hinge 14 First enclosure 17 Keyboard 18 Pointing device 20 Display panel 30 Second enclosure 31 Opening 32 Top 33 Bottom 34, 78 Connector 50 Wireless device 51 Antenna part 52 Circuit part 61, 161 First antenna element 61a First rising part 61b First main part 61c First intersection part 61d First opposing part 61s First feed point 61w First conductor 62 Second antenna element 62s Second feed point 62w Second conductor 63 Third antenna element 63s Third feed point 63w Third conductor 64 Fourth antenna element 64s Fourth feed point 64w Fourth conductor 65 Antenna cover 66 Shielding wall 67 Second conductive member 68 First conductive members 68b, 68c, 68d Recess 69 Third conductive member 71 Housing section 72 Grounding section 73 Lid section 74 Top plate 75 Circuit board 76 Communication circuit

Claims

1. A wireless device comprising: a first antenna element and a second antenna element that resonate in a first frequency band and a second frequency band which is a frequency band lower than the first frequency band; a third antenna element and a fourth antenna element that resonate only in the first frequency band among the first and second frequency bands; and a shielding wall which is a conductive member disposed between the first antenna element and the second antenna element, wherein the first antenna element and the second antenna element are arranged in a first direction; the third antenna element and the fourth antenna element are arranged in the first direction; and the first antenna element and the third antenna element are arranged in a second direction perpendicular to the first direction.

2. The wireless device according to claim 1, wherein the first antenna element has a first main portion extending in the first direction and facing the third antenna element, and a first crossing portion connected to the end of the first main portion in the first direction and extending in a direction intersecting the first main portion, and the third antenna element extends in a direction along the first main portion.

3. The wireless device according to claim 2, wherein the wireless device is connected to an electronic device, and the electronic device uses the wireless device to perform wireless communication.

4. The wireless device according to claim 3, wherein the wireless device is detachably attached to the electronic device.

5. The wireless device according to claim 3 or 4, wherein the electronic device has a conductive housing, the housing has an opening into which the wireless device is inserted, and the wireless device further comprises a conductive ground portion and a conductive cover portion disposed in the opening and electrically connected to the housing.

6. The wireless device according to claim 3 or 4, wherein the electronic device has a conductive housing, the housing has an opening into which the wireless device is inserted, and the first main part is located outside the housing in a view from a third direction perpendicular to the first and second directions when the wireless device is inserted into the opening.

7. The wireless device according to any one of claims 2 to 4, wherein the distance between the third antenna element and the second antenna element in the second direction is smaller than the distance between the third antenna element and the first main part in the second direction.

8. The wireless device according to any one of claims 2 to 4, wherein the shielding wall extends in the second direction from the position of the fourth antenna element in the second direction to the position of the second antenna element in the second direction.

9. A wireless device according to any one of claims 2 to 4, further comprising a conductive first conductive member, wherein in the second direction, the first antenna element, the second antenna element, the third antenna element, and the fourth antenna element are arranged on one side with respect to the first conductive member.

10. The wireless device according to claim 9, wherein the distance between the first conductive member and the second antenna element in the second direction is greater than the distance between the first conductive member and the fourth antenna element in the second direction.

11. The wireless device according to any one of claims 2 to 4, wherein the first antenna element has a first feed point, the second antenna element has a second feed point, the third antenna element has a third feed point, the fourth antenna element has a fourth feed point, and the distance between the first feed point and the third feed point in a third direction perpendicular to the first and second directions is 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band.

12. The wireless device according to claim 11, wherein the first antenna element has a first rising portion connected to one end of the first main portion in the third direction, the first rising portion extends in a direction intersecting the first main portion, and the first feed point is located on the first rising portion.

13. The wireless device according to any one of claims 2 to 4, wherein the first antenna element has a first feed point, the second antenna element has a second feed point, the third antenna element has a third feed point, the fourth antenna element has a fourth feed point, and the distance between the third feed point and the fourth feed point in a third direction perpendicular to the first and second directions is 1 / 15 or more of the wavelength corresponding to the lower limit frequency of the first frequency band.

14. The wireless device according to any one of claims 2 to 4, wherein the third antenna element is a monopole antenna having a portion extending in the first direction.

15. The wireless device according to any one of claims 2 to 4, wherein the first antenna element and the second antenna element are antennas of different types.

16. The wireless device according to claim 15, wherein the first antenna element is a monopole antenna and the second antenna element is an inverted F antenna.

17. The wireless device according to any one of claims 2 to 4, wherein the third antenna element and the fourth antenna element are antennas of different types.

18. The wireless device according to claim 17, wherein the third antenna element is a monopole antenna and the fourth antenna element is an inverted F antenna.

19. The wireless device according to any one of claims 2 to 4, wherein the distance between the first main part and the third antenna element is smaller than the length of the first main part in the first direction.

20. The wireless device according to any one of claims 2 to 4, wherein the first frequency band is a frequency band of 1.7 GHz or more and 4 GHz or less, and the second frequency band is a frequency band of 600 MHz or more and 900 MHz or less.

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