Multiband antenna

Abstract

The present invention relates to a multi-band antenna which is connected to a main conductor when in use, wherein: the multi-band antenna has a conductor main body portion, a first ground terminal, and a second ground terminal; the conductor main body portion is longer in a first direction and extends in a horizontal plane defined by the first direction and a second direction perpendicular to the first direction; the first ground terminal and the second ground terminal are connected to the main conductor when the multi-band antenna is in use; the conductor main body portion has a first long edge and a second long edge at both ends in the second direction, respectively; the conductor main body portion is formed with a slot and an open portion; the slot is longer in the first direction; the open portion is provided in the first long edge and connects the slot with an outside of the conductor main body portion; and the first ground terminal and the second ground terminal extend from the second long edge.

Description

Technical Field

[0001] This invention relates to a multi-band antenna, and more specifically to a multi-band antenna having a conductor body with slots. Background Technology

[0002] Japanese Patent Application Publication No. 2012-85262 (Patent Document 1) discloses an example of an antenna device having a conductor plate with a groove.

[0003] like Figure 18 As shown, the antenna device 90 disclosed in Patent Document 1 includes a conductor plate 910 disposed on one surface of a dielectric substrate (not shown). The conductor plate 910 has two slots 920 and 930. Slots 920 and 930 have open ends 922 and 932, respectively. Slots 920 and 930 are arranged such that the open ends 922 and 932 face each other. The open ends 922 and 932 are adjacent to an opening 940 that opens at the edge of the conductor plate 910.

[0004] The antenna assembly 90 also has a stub 950. The stub 950 is formed on another surface of a dielectric substrate (not shown). One end of the stub 950 is connected to the conductor plate 910 through a through-hole 960. When viewed from above, the stub 950 extends to intersect the slot 920. Summary of the Invention

[0005] The antenna device 90 in Patent Document 1 uses a conductor plate 910 formed on the surface of a dielectric substrate. Therefore, the antenna device 90 is difficult to miniaturize.

[0006] The purpose of this invention is to provide a multi-band antenna that can be miniaturized without compromising antenna characteristics.

[0007] One aspect of the present invention provides a multiband antenna that is connected to a main body during use. The multiband antenna has: a conductor body portion, a first ground terminal, and a second ground terminal; the conductor body portion is longer in a first direction and extends in a horizontal plane defined by the first direction and a second direction perpendicular to the first direction; when the multiband antenna is used, the first ground terminal and the second ground terminal are connected to the main body; the conductor body portion has a first long edge and a second long edge at its two ends in the second direction, respectively; the conductor body portion is formed with a slot and an opening; the slot is longer in the first direction; the opening is disposed in the first long edge and connects the slot to the outside of the conductor body portion; and the first ground terminal and the second ground terminal extend from the second long edge.

[0008] By studying the following description of the preferred embodiments and referring to the accompanying drawings, one can understand the purpose of the invention and its structure more fully.

[0009] The multiband antenna of one aspect of the present application has a first ground terminal and a second ground terminal extending from a second long side of the conductor main portion. With this structure, an external conductor can be used as a main conductor, and the size of the multiband antenna itself can be reduced. In addition, by appropriately setting the positions of the first ground terminal and the second ground terminal, a high radiation efficiency can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a plan view showing a multiband antenna of an embodiment of the present application;

[0011] Figure 2 is a plan view showing Figure 1 a first modified example of the multiband antenna of

[0012] Figure 3 is a plan view showing Figure 1 a second modified example of the multiband antenna of

[0013] Figure 4 is a plan view showing Figure 1 a third modified example of the multiband antenna of

[0014] Figure 5 is a plan view showing Figure 1 a fourth modified example of the multiband antenna of

[0015] Figure 6 is a plan view showing Figure 1 a fifth modified example of the multiband antenna of

[0016] Figure 7 is a plan view showing Figure 1 a sixth modified example of the multiband antenna of

[0017] Figure 8 is a plan view showing Figure 1 a seventh modified example of the multiband antenna of

[0018] Figure 9 is a plan view showing Figure 1 an eighth modified example of the multiband antenna of

[0019] Figure 10 is a plan view showing Figure 1 a ninth modified example of the multiband antenna of

[0020] Figure 11 is a plan view showing Figure 1 a tenth modified example of the multiband antenna of

[0021] Figure 12 is a plan view showing Figure 1 an eleventh modified example of the multiband antenna of

[0022] Figure 13 is a perspective view showing a twelfth modification of the multiband antenna of Figure 1

[0023] Figure 14 is a perspective view showing a thirteenth modification of the multiband antenna of Figure 1

[0024] Figure 15 is a perspective view showing a fourteenth modification of the multiband antenna of Figure 1

[0025] Figure 16 is a perspective view showing a fifteenth modification of the multiband antenna of Figure 1

[0026] Figure 17 is a perspective view showing a modification of the multiband antenna of Figure 8

[0027] Figure 18 is a plan view of the antenna device disclosed in Patent Document 1.

[0028] While the application is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail in the text. It should be understood, however, that the drawings and detailed description are not intended to limit the application to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the idea and scope of the application as defined by the appended claims. DETAILED DESCRIPTION

[0029] Referring to Figure 1 , a multiband antenna 10 according to an embodiment of the present application has a conductor main body portion 12, a first ground terminal 14, and a second ground terminal 16.

[0030] As shown in Figure 1 , the conductor main body portion 12 extends in a horizontal plane defined by a first direction and a second direction perpendicular to each other. In the present embodiment, the first direction is an X direction, and the second direction is a Y direction. In detail, the conductor main body portion 12 has a rectangular shape longer in the first direction. The conductor main body portion 12 has a first short edge 121 and a second short edge 123 at both ends in the first direction, respectively, and a first long edge 125 and a second long edge 127 at both ends in the second direction, respectively. However, the present application is not limited thereto. Each of the first short edge 121, the second short edge 123, the first long edge 125, and the second long edge 127 can not be a straight line.

[0031] As shown in Figure 1 ​​​​​As shown, the conductor body portion 12 is formed with a slot 130 and an open portion 136. The slot 130 has a rectangular shape that is longer in the first direction. The slot 130 is separate from each of the first short edge 121, the second short edge 123, the first long edge 125, and the second long edge 127. In other words, the slot 130 does not open in each of the first short edge 121, the second short edge 123, the first long edge 125, and the second long edge 127. In the present embodiment, a midpoint M of the first direction of the slot 130 coincides with a center of the conductor body portion 12 in the first direction. Further, in the second direction, the slot 130 is closer to the first long edge 125 than to the second long edge 127. However, the present application is not limited thereto. The position of the slot 130 with respect to the conductor body portion 12 can be freely set according to the intended characteristics.

[0032] As shown in FIG. 1, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor body portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction in the second direction. Figure 1 As shown, the open portion 136 is provided in the first long edge 125 of the conductor body portion 12. Specifically, the open portion 136 connects the slot 130 with the outside of the conductor body portion 12 in the second direction. In other words, the open portion 136 extends from the slot 130 in the +Y direction and opens in the first long edge 125 of the conductor body portion 12.

[0033] As shown in FIG. 1, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor body portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction in the second direction. Figure 1 As shown, the slot 130 has a first slot 132 and a second slot 134 separated by the open portion 136. The first slot 132 and the second slot 134 are arranged in the first direction. Specifically, the first slot 132 is closer to the first short edge 121 than to the second short edge 123 in the first direction, and the second slot 134 is closer to the second short edge 123 than to the first short edge 121 in the first direction.

[0034] As shown in FIG. 1, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor body portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction in the second direction. Figure 1 As shown in FIG. 1, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor body portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction in the second direction.

[0035] As shown in FIG. 1, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor body portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction in the second direction. Figure 1 As shown, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor body portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction in the second direction.

[0036] As shown in FIG. 1, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor body portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction in the second direction. Figure 1As shown, in this embodiment, the first grounding terminal 14 and the second grounding terminal 16 each have a generally square shape. Furthermore, the first grounding terminal 14 has a first edge 141, a second edge 143, and a third edge 145, and the second grounding terminal 16 has a first edge 161, a second edge 163, and a third edge 165. However, the invention is not limited thereto. Each of the first grounding terminal 14 and the second grounding terminal 16 may have a rectangular shape that is longer in a first direction or a second direction. Furthermore, the shapes of the first grounding terminal 14 and the second grounding terminal 16 may differ from each other. Additionally, each of the second edge 143 of the first grounding terminal 14 and the second edge 163 of the second grounding terminal 16 may have one or more recesses or cutouts.

[0037] from Figure 1 As can be seen, during use, the multi-band antenna 10 is fed to extend on the first slot 132. For this purpose, the multi-band antenna 10 has a feed point 18 at the edge of the first slot 132. In the first direction, when viewed from the opening 136, the feed point 18 is located on the side of the first short edge 121.

[0038] like Figure 1 As shown, in the first direction, when viewed from the feed point 18, the first ground terminal 14 is at least partially located on the side of the first short edge 121. In this embodiment, when viewed from the feed point 18, the first ground terminal 14 is entirely located on the side of the first short edge 121. However, the invention is not limited thereto. When viewed from the feed point 18, the first ground terminal 14 may be partially located on the side of the second short edge 123.

[0039] like Figure 1 As shown, in this embodiment, the first grounding terminal 14 extends along the second direction in the -Y direction to connect with the first short edge 121. In other words, in this embodiment, the position of the first edge 141 of the first grounding terminal 14 in the first direction coincides with the position of the first short edge 121. However, the invention is not limited thereto. In the invention, the first edge 141 of the first grounding terminal 14 may be directed away from the first short edge 121 towards the second short edge 123. However, the radiation efficiency is higher when the position of the first edge 141 of the first grounding terminal 14 coincides with the position of the first short edge 121 than when they do not coincide. Therefore, preferably, the first grounding terminal 14 extends at least partially to connect with the first short edge 121.

[0040] like Figure 1As shown, in the present embodiment, the second ground terminal 16 is located on the second short edge 123 side when viewed from the feeding point 18. Specifically, the second ground terminal 16 is partially located on the second short edge 123 side when viewed from the open portion 136. However, the present application is not limited to this. The second ground terminal 16 can be entirely located on the second short edge 123 side when viewed from the open portion 136.

[0041] Figure 1 The multiband antenna 10 can be formed, for example, by press working a metal plate (conductor plate). Alternatively, the conductor main portion 12 can be formed of a metal plate, and the first and second ground terminals 14 and 16 can be formed of other members such as a copper tape. Or, the multiband antenna 10 can be formed by a conductive layer (not shown) formed in a pattern on a dielectric substrate (not shown). In any case, the multiband antenna 10 is connected to a main conductor (80, refer to Figure 6 to Figure 8 ) when in use. Specifically, the first and second ground terminals 14 and 16 are connected to the main conductor when the multiband antenna 10 is in use. In the case where at least the conductor main portion 12 of the multiband antenna 10 is made of a metal plate, the main conductor can be a conductor layer formed on a substrate on which the multiband antenna 10 is mounted. In the case where the multiband antenna 10 is made of a conductive layer included in a multilayer substrate, the main conductor can be made of the conductive layer from which the multiband antenna 10 is manufactured, or can be made of another conductive layer (e.g., a ground plane) of the multilayer substrate. However, the present application is not limited to this. The main conductor can be a metal case of a communication device including the multiband antenna 10 or a metal plate for heat dissipation.

[0042] According to the present embodiment, the multiband antenna 10 uses an external conductor as a main conductor (80, refer to Figure 6 to Figure 8 ), and thus can achieve miniaturization of the antenna itself. Further, by appropriately arranging the first and second ground terminals 14 and 16, high radiation efficiency can be achieved.

[0043] Although the above has described an embodiment of the present application, the multiband antenna 10 of the present embodiment can be modified as follows. In the following description, the same or similar components are denoted by the same or similar reference numerals and the description thereof is omitted.

[0044] [First Modified Example]

[0045] Referring to Figure 2 , the multiband antenna 10A according to the first modified example is provided with a radiating element 20 in addition to the structure of the multiband antenna 10.

[0046] As Figure 2As shown, in the present variant, the radiating element 20 has a first portion 22 and a second portion 24. The first portion 22 of the radiating element 20 has a rectangular shape that is longer in the second direction. Further, the second portion 24 of the radiating element 20 has a rectangular shape that is longer in the first direction.

[0047] As shown, the first portion 22 of the radiating element 20 extends away from the first long edge 125 of the conductor body portion 12 toward the slot 130. Further, the second portion 24 of the radiating element 20 extends from the first portion 22 in the first direction in the -X direction. Figure 2 As shown, the first portion 22 of the radiating element 20 is closer to the first slot 132 than the second slot 134. Further, the first portion 22 is at least partially closer to the open portion 136 than the center M of the slot 130 in the first direction. Specifically, the first portion 22 has a first edge 221, a second edge 223, and a third edge 225. Also, the third edge 225 of the first portion 22 is located between the open portion 136 and the center M of the slot 130 in the first direction. In the present variant, the first edge 221 of the first portion 22 is closer to the center M of the slot 130 than the first short edge 121 in the first direction.

[0048] Figure 2 As shown, the second portion 24 of the radiating element 20 has a first edge 241, a second edge 243, and a third edge 245. In the present variant, the first edge 241 of the second portion 24 is located at the same position as the second edge 223 of the first portion 22 in the second direction. Further, in the present variant, the second portion 24 is away from the first long edge 125 of the conductor body portion 12. In other words, in the second direction, the size of the second portion 24 is smaller than the first length LI of the first portion 22. In the first direction, the second edge 243 of the second portion 24 is located between the second short edge 123 of the conductor body portion 12 and the open portion 136.

[0049] As shown, the first portion 22 of the radiating element 20 is closer to the first slot 132 than the second slot 134. Further, the first portion 22 is at least partially closer to the open portion 136 than the center M of the slot 130 in the first direction. Specifically, the first portion 22 has a first edge 221, a second edge 223, and a third edge 225. Also, the third edge 225 of the first portion 22 is located between the open portion 136 and the center M of the slot 130 in the first direction. In the present variant, the first edge 221 of the first portion 22 is closer to the center M of the slot 130 than the first short edge 121 in the first direction. Figure 2 As shown, the second portion 24 of the radiating element 20 has a first edge 241, a second edge 243, and a third edge 245. In the present variant, the first edge 241 of the second portion 24 is located at the same position as the second edge 223 of the first portion 22 in the second direction. Further, in the present variant, the second portion 24 is away from the first long edge 125 of the conductor body portion 12. In other words, in the second direction, the size of the second portion 24 is smaller than the first length LI of the first portion 22. In the first direction, the second edge 243 of the second portion 24 is located between the second short edge 123 of the conductor body portion 12 and the open portion 136.

[0050] Figure 2 As shown, the second portion 24 of the radiating element 20 has a first edge 241, a second edge 243, and a third edge 245. In the present variant, the first edge 241 of the second portion 24 is located at the same position as the second edge 223 of the first portion 22 in the second direction. Further, in the present variant, the second portion 24 is away from the first long edge 125 of the conductor body portion 12. In other words, in the second direction, the size of the second portion 24 is smaller than the first length LI of the first portion 22. In the first direction, the second edge 243 of the second portion 24 is located between the second short edge 123 of the conductor body portion 12 and the open portion 136.

[0051] [Second Variant]

[0052] Referring to Figure 3 ​​According to the second variant, the multi-band antenna 10B is provided with a radiating element 20B with a shape different from that of the radiating element 20 of the multi-band antenna 10A.

[0053] like Figure 3 As shown, the radiating element 20B has a first portion 22B and a second portion 24. In this variant, the first portion 22B has a rectangular shape that is longer in a first direction. In the first direction, the position of the first edge 221B of the first portion 22B coincides with the position of the first short edge 121 of the conductor body portion 12.

[0054] Each of the multi-band antennas 10, 10A, and 10B is planar. However, the invention is not limited thereto. The multi-band antennas of the present invention can also be formed three-dimensionally, as in the following third to fifteenth variations. For example, each three-dimensional multi-band antenna can be formed by stamping and bending a single metal plate. The invention is not limited thereto. Each multi-band antenna can also be formed by combining multiple conductor plates. Furthermore, if desired, one or more conductor plates can be combined with a support made of insulating resin to improve strength.

[0055] [Third variant example]

[0056] Reference Figure 4 According to the third variant, the multi-band antenna 10C and Figure 1 Similar to the multi-band antenna 10, it has a conductor body 12, a first grounding terminal 14C and a second grounding terminal 16C.

[0057] like Figure 4 As shown, the first grounding terminal 14C and the second grounding terminal 16C each have a portion extending from the second long edge 127 of the conductor body portion 12 in a direction intersecting the conductor body portion 12 or the horizontal plane. In this variant, the first grounding terminal 14C and the second grounding terminal 16C extend downwards in the vertical direction. In this variant, the vertical direction is the Z direction. Furthermore, the +Z direction points upwards, while the -Z direction points downwards.

[0058] from Figure 6 to Figure 8 It can be seen that, Figure 4 The multi-band antenna 10C has a portion extending in a direction that intersects with the conductor body 12 or with a horizontal plane. Therefore, when viewed in the vertical direction, the distance from the conductor body 12 to the main body 80 can be increased without increasing the area occupied by the multi-band antenna 10C. Thus, the multi-band antenna 10C is less susceptible to the influence of the main body 80.

[0059] [Fourth Variation Example]

[0060] Reference Figure 5The multi-band antenna 10D according to the fourth variant is similar to the multi-band antenna 10B according to the second variant. However, the multi-band antenna 10D is provided with a first ground terminal 14C and a second ground terminal 16C extending downward in a manner similar to those of the multi-band antenna 10C.

[0061] Although each of the aforementioned multiband antennas 10 and 10A to 10D feeds the feed point 18, the multiband antenna of the present invention may further be provided with a feed terminal 30 or 30F, as in the fifth to seventh variations. As described later, the feed terminal 30 or 30F has a portion that intersects with the horizontal plane, such that each of the multiband antennas 10E to 10G can be surface-mounted on a circuit board (not shown) that is the object.

[0062] [Fifth Variation Example]

[0063] refer to Figure 6 In addition to the structure of the multi-band antenna 10D according to the fourth variant, the multi-band antenna 10E according to the fifth variant is also provided with a feed terminal 30.

[0064] like Figure 6 As shown, the power supply terminal 30 has a rectangular shape and is disposed on the conductor body portion 12. Specifically, the conductor body portion 12 has an opposing portion 1250 and a connecting portion 1270 sandwiching a slot 130 therebetween, and the power supply terminal 30 is disposed on the opposing portion 1250. More specifically, the power supply terminal 30 has a portion extending from the inner edge of the first slot 132 defined by the opposing portion 1250 in a direction intersecting the horizontal plane. In this variant, the power supply terminal 30 extends downwards as a whole. Here, the opposing portion 1250 is the portion located between the first long edge 125 of the conductor body portion 12 and the slot 130, and the connecting portion 1270 is the portion located between the second long edge 127 of the conductor body portion 12 and the slot 130. In this variant, the power supply terminal 30 is made of the same metal plate as the conductor body portion 12.

[0065] like Figure 6 As shown, when viewed from the open portion 136, the power supply terminal 30 is located on the side of the first short edge 121 in the first direction. Furthermore, when viewed from the power supply terminal 30, the first grounding terminal 14C is at least partially located on the side of the first short edge 121, and when viewed from the power supply terminal 30, the second grounding terminal 16C is at least partially located on the side of the second short edge 123. In this variant, when viewed from the power supply terminal 30, the first grounding terminal 14C is entirely located on the side of the first short edge 121, and when viewed from the power supply terminal 30, the second grounding terminal 16C is entirely located on the side of the second short edge 123.

[0066] from Figure 6As can be seen, when mounted on an object (not shown), the feed terminal 30 is connected to a feed line 70 formed on the object. Further, the first ground terminal 14C and the second ground terminal 16C are each connected to a main conductor 80. The object is, for example, a multilayer substrate. The feed line 70 and the main conductor 80 are formed by the same conductor layer included in the multilayer substrate, or by different conductor layers included in the multilayer substrate.

[0067] [Sixth Modification Example]

[0068] Referring to Figure 7 , the shape of the feed terminal 30F of the multiband antenna 10F according to the sixth modification example is different from the shape of the feed terminal 30 of the multiband antenna 10E according to the fifth modification example.

[0069] As Figure 7 shown, the feed terminal 30F has a first feed portion 32 and a second feed portion 34. The first feed portion 32 extends from the opposite portion 1250 of the conductor main body portion 12 in the horizontal plane. The second feed portion 34 extends from one end of the first feed portion 32 in the first direction in a direction intersecting the horizontal plane. In the present modification example, the first feed portion 32 extends from the inner edge of the first groove 132 in the -Y direction and protrudes from the first groove 132. The second feed portion 34 extends downward from the -X side edge of the first feed portion 32.

[0070] From Figure 6 a comparison with Figure 7 , Figure 6 the feed terminal 30 of the multiband antenna 10E needs to be formed separately from the conductor main body portion 12 and then connected to the conductor main body portion 12. On the other hand, the feed terminal 30F of the multiband antenna 10F according to the present modification example can be formed by cutting and bending the same metal plate as the conductor main body portion 12. Therefore, the multiband antenna 10F is easier to manufacture than the multiband antenna 10E.

[0071] [Seventh Modification Example]

[0072] Referring to Figure 8 , the multiband antenna 10G according to the seventh modification example has a stub 40 in addition to the structure of the multiband antenna 10F of the sixth modification example.

[0073] As Figure 8As shown, a stub 40 is disposed on the conductor body portion 12 to substantially cross the slot 130. Specifically, the stub 40 is located in the first direction between the feed terminal 30F and the first short edge 121. One end of the stub 40 is connected to the connection portion 1270, and the stub 40 extends toward the opposing portion 1250. The stub 40 does not reach the opposing portion 1250, and the other end of the stub 40 is separated from and faces the opposing portion 1250. In this variant, the stub 40, together with the feed terminal 30F, is formed from the same metal plate as the conductor body portion 12. Therefore, the multi-band antenna 10G is easier to manufacture than the multi-band antenna 10E. However, the invention is not limited thereto. The stub 40 may be located in the first direction between the feed terminal 30F and the second short edge 123. The position of the stub 40 in the first direction is determined based on the expected characteristics.

[0074] exist Figure 1 to Figure 8 In each of the multiband antennas 10 and 10A to 10G, the conductor body portion 12 is arranged in a planar configuration. However, the present invention is not limited thereto. In the multiband antenna of the present invention, the conductor body portion 12 may also be formed three-dimensionally as in the eighth to twelfth variations 12 described later.

[0075] [Eighth Variation Example]

[0076] Reference Figure 9 According to the eighth variant, the multi-band antenna 10H, in addition to the structure of the multi-band antenna 10C according to the third variant, also has an extension 50.

[0077] like Figure 9 As shown, the extension 50 has a first extension 52 and a second extension 54. Each of the first extension 52 and the second extension 54 has a rectangular shape that is longer in a first direction. The first extension 52 and the second extension 54 are arranged along the first direction to sandwich the opening 136 between them. Both the first extension 52 and the second extension 54 extend from the first long edge 125 of the conductor body portion 12 in a direction intersecting the horizontal plane. In this variant, the first extension 52 and the second extension 54 extend downward. Since the multiband antenna 10H has the extension 50, its radiation efficiency can be improved without increasing the occupied area when viewed from the vertical direction.

[0078] [Ninth Variation Example]

[0079] Reference Figure 10 The multiband antenna 10I according to the ninth variant has an extension 50I that is different from the multiband antenna 10H according to the eighth variant. The extension 50I has a first extension 52I and a second extension 54I. The first extension 52I and the second extension 54I extend upward from the first long edge 125 of the conductor body portion 12.

[0080] [Eleventh Modified Example]

[0081] Referring to Figure 11 The multiband antenna 10J according to the tenth modified example has an extension 50J different from the multiband antenna 10H according to the eighth modified example. The extension 50J has a rectangular shape longer in the second direction, and extends from the second short edge 123 of the conductor main body portion 12 in a direction intersecting the horizontal plane. In the present modified example, the extension 50J extends downward. However, the present application is not limited to this. The extension 50J can extend upward.

[0082] [Eleventh Modified Example]

[0083] Referring to Figure 12 The multiband antenna 10K according to the eleventh modified example has the extension 50J in addition to the structure of the multiband antenna 10D according to the fourth modified example. However, the present application is not limited to this. The extension 50J can extend upward.

[0084] [Eleventh Modified Example]

[0085] Referring to Figure 13 The multiband antenna 10L according to the twelfth modified example has the additional extension 60 in addition to the structure of the multiband antenna 10H according to the eighth modified example. The additional extension 60 has a first additional extension 62 and a second additional extension 64. Each of the first additional extension 62 and the second additional extension 64 has a rectangular shape longer in the first direction. The first additional extension 62 and the second additional extension 64 extend in the second direction in the -Y direction from the lower edge of the first extension 52 and the lower edge of the second extension 54, respectively. Since the multiband antenna 10L has the additional extension 60, it is possible to improve the radiation efficiency without increasing the occupied area when viewed in the up-down direction.

[0086] In each of the multiband antennas 10D to 10G according to the fourth to seventh modified examples, the radiating element 20 is in a planar configuration. However, the present application is not limited to this. In the multiband antenna of the present application, the radiating element 20 can also be formed in three dimensions as in the thirteenth to fifteenth modified examples described later. If so, it is possible to increase the radiation efficiency of the multiband antenna without increasing the occupied area of the antenna when viewed in the up-down direction.

[0087] [Thirteenth Modified Example]

[0088] Referring to Figure 14 The multiband antenna 10M according to the thirteenth modified example has a radiating element 20M different in shape from the radiating element 20 of the multiband antenna 10D according to the fifth modified example.

[0089] AsFigure 14 As shown in FIG. 13, the radiating element 20M is bent in the second direction, thereby having a first radiating portion 2010 and a second radiating portion 2020. The first radiating portion 2010 has the same shape as the radiating element 20 in the multiband antenna 10D. The second radiating portion 2020 extends from an edge of the first radiating portion 2010 in a direction crossing the horizontal plane. In this variant, the second radiating portion 2020 extends downward.

[0090] [Fourteenth Variant]

[0091] Referring to FIG. 14, the multiband antenna 10N according to the fourteenth variant has a radiating element 20N different in shape from the radiating element 20M of the multiband antenna 10M according to the thirteenth variant. Figure 15 As shown in FIG. 14, the radiating element 20N is bent in the second direction, thereby having a first radiating portion 2010 and a second radiating portion 2020N. The first radiating portion 2010 has the same shape as the radiating element 20 in the multiband antenna 10D. The second radiating portion 2020N extends upward from an edge of the first radiating portion 2010 in the second direction.

[0092] Figure 15 [Fourteenth Variant]

[0093] Referring to FIG. 14, the multiband antenna 10N according to the fourteenth variant has a radiating element 20N different in shape from the radiating element 20M of the multiband antenna 10M according to the thirteenth variant.

[0094] Referring to FIG. 14, the multiband antenna 10N according to the fourteenth variant has a radiating element 20N different in shape from the radiating element 20M of the multiband antenna 10M according to the thirteenth variant. Figure 16 As shown in FIG. 14, the radiating element 20N is bent in the second direction, thereby having a first radiating portion 2010 and a second radiating portion 2020N. The first radiating portion 2010 has the same shape as the radiating element 20 in the multiband antenna 10D. The second radiating portion 2020N extends upward from an edge of the first radiating portion 2010 in the second direction.

[0095] Figure 16 As shown in FIG. 14, the third radiating portion 2030 extends from a lower edge of the second radiating portion 2020 in a direction crossing the second radiating portion 2020. In this variant, the third radiating portion 2030 extends in the second direction in the -Y direction. Since the multiband antenna 10O has the third radiating portion 2030, the radiation efficiency of the radiating element 20O can be further improved.

[0096] Although the present application has been specifically described above in connection with the embodiments, the present application is not limited thereto, but can have various modifications and alternatives without departing from the spirit of the present application. For example, the feed terminal 30 or 30F is applicable to each of the multiband antennas 10C and 10H to 10O of the third and eighth to fifteenth variants. Similarly, the stub 40 is applicable to each of the multiband antennas 10C and 10H to 10O of the third and eighth to fifteenth variants.

[0097] ​​Furthermore, although the stub 40 in the seventh variation has a rectangular shape, the invention is not limited thereto. For example, as Figure 17 The multiband antenna 10P shown may have an L-shaped stub 40P. Specifically, the stub 40P extends from the connector 1270 along the second direction in the +Y direction and further along the first direction in the +X direction. In the second direction, one end of the stub 40P is connected to the connector 1270, while the other end of the stub 40P is separated from and faces the opposing portion 1250. Because the stub 40P is L-shaped, its electrical length can be set without being limited by the dimensions of the slot 130 in the second direction.

[0098] Although preferred embodiments of the invention have been described, those skilled in the art will recognize that other and further modifications may be made thereto without departing from the spirit of the invention, and all such embodiments falling within the spirit of the invention are intended to be claimed.

Claims

1. A multi-band antenna connected to a dominant body during use, wherein: The multi-band antenna has: a conductor body, a first grounding terminal, and a second grounding terminal; The conductor body extends in a horizontal plane defined by a first direction and a second direction perpendicular to the first direction, and its length in the first direction is longer than that in the second direction; When the multi-band antenna is used, the first grounding terminal and the second grounding terminal are connected to the main body; The conductor body has a first long edge and a second long edge at both ends in the second direction; The conductor body has a groove and an open portion; The length of the groove in the first direction is longer than that in the second direction; The open portion is disposed in the first long edge and connects the groove to the outer side of the conductor body portion; The first grounding terminal and the second grounding terminal extend from the second long edge; The multi-band antenna also has a feed terminal; The conductor body has a first short edge and a second short edge at both ends in the first direction; The groove is divided into a first groove and a second groove located on both sides along the first direction. The first groove is located closer to the first short edge than the second short edge in the first direction; The second groove is located closer to the second short edge than the first short edge in the first direction; When viewed from the open portion, the power supply terminal is disposed on the first short edge side along the first direction; When viewed from the power supply terminal, the first grounding terminal is at least partially located on the first short edge side; When viewed from the power supply terminal, the second grounding terminal is at least partially located on the second short edge side; The first grounding terminal and the second grounding terminal are rectangular sheet-like structures extending from the outermost edge of the second long edge in the second direction; The outermost edge of the first grounding terminal in the first direction is flush with the outermost edge of the first short edge in the first direction; The multi-band antenna further includes a radiating element; The radiating element has a first part and a second part; The first portion extends away from the groove along the second direction from the first long edge; The second portion extends from the first portion along the first direction; The first portion has a first length in the second direction; The second portion has a second length in the first direction; and The second length is longer than the first length.

2. The multi-band antenna according to claim 1, wherein, Each of the first grounding terminal and the second grounding terminal has a portion extending in a direction intersecting the horizontal plane.

3. The multi-band antenna according to claim 2, wherein, The power supply terminal has a portion extending in a direction intersecting the horizontal plane.

4. The multi-band antenna according to claim 3, wherein: At least the conductor body and the feed terminal are made of metal plates; The power supply terminal has a first power supply section and a second power supply section; The first power supply part protrudes from the inner edge of the first slot into the first slot; The second power supply unit extends from one end of the first power supply unit in a direction that intersects the horizontal plane.

5. The multi-band antenna according to claim 1, wherein, The first portion is located closer to the first slot than the second slot.

6. The multi-band antenna according to claim 5, wherein, The first portion is located at least partially closer to the opening than the center of the groove in the first direction.

7. The multi-band antenna according to claim 1, wherein, The radiating element is bent to have a first radiating portion and a second radiating portion, the first radiating portion extending in the horizontal plane, and the second radiating portion extending from the first radiating portion in a direction intersecting the horizontal plane.

8. The multi-band antenna according to claim 1, wherein: The multi-band antenna further includes a stub wire; The conductor body portion has a connecting portion and an opposing portion, the connecting portion being located at the second long edge, and the opposing portion being located at the first long edge; The connecting portion and the opposing portion are arranged along the second direction such that the groove is located between them; One end of the short wire is connected to the connecting part; and The other end of the stub is spaced apart from and opposite to the opposing portion.

9. The multi-band antenna according to claim 1, wherein, The multi-band antenna also has an extension that extends from the conductor body in a direction intersecting the horizontal plane.

10. The multi-band antenna according to claim 9, wherein, The multi-band antenna also has an additional extension extending from the extension along a direction intersecting the plane containing the extension.

Images