Multi-band Antennas

Abstract

To provide a multiband antenna capable of downsizing without deteriorating antenna characteristics.SOLUTION: A multiband antenna 10 comprises: a conductor main part 12; a first ground terminal 14; and a second ground terminal 16. The conductor main part 12 has a long side in a first direction and extends in a horizontal plane defined by the first direction and a second direction. The conductor main part 12 has a first long edge 125 and a second long edge 127 at each of both ends of the conductor main part in the second direction. A slot 130 and an open part 136 are formed in the conductor main part 12. The slot 130 has a long side in the first direction. The open part 136 is provided on the first long edge 125 and connects the slot 130 and the outside of the conductor main part 12 in the second direction. The first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127. The first ground terminal 14 and the second ground terminal 16 are connected to a host conductor when the multiband antenna 10 is used.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a multi-band antenna, and more particularly to a multi-band antenna having a conductor body with a slot formed therein. [Background technology]

[0002] Patent Document 1 discloses an example of an antenna device that includes a conductor plate in which a slot is formed.

[0003] As shown in Fig. 18, the antenna device 90 disclosed in Patent Document 1 includes a conductor plate 910 provided on one surface of a dielectric substrate (not shown). Two slots 920, 930 are formed in the conductor plate 910. The slots 920, 930 have open ends 922, 932, respectively. The slots 920, 930 are arranged such that the open ends 922, 932 face each other. The open ends 922, 932 are formed by connecting the conductor plate 910 9. The opening 940 is continuous with an opening at the edge of the groove 940.

[0004] The antenna device 90 also has a stub 950. The stub 950 is formed on the other surface of the dielectric substrate (not shown). One end of the stub 950 is connected to the conductor plate 910 through a via 960. The stub 950 extends so as to intersect with the slot 920 in a plan view. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-85262 A Summary of the Invention [Problem to be solved by the invention]

[0006] The antenna device 90 of Patent Document 1 uses a conductive plate 910 formed on one surface of a dielectric substrate. Therefore, the antenna device 90 has a problem in that it is difficult to reduce the size of the device.

[0007] An object of the present invention is to provide a multi-band antenna that can be miniaturized without degrading the antenna characteristics. [Means for solving the problem]

[0008] The present invention provides a multi-band antenna that, when used as a first multi-band antenna, is connected to a host conductor, comprising: the multiband antenna has a conductor main portion, a first ground terminal, and a second ground terminal; the conductor main portion has a longitudinal direction in a first direction and extends within 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 host conductor when the multiband antenna is used; The conductor main portion has a first long edge and a second long edge at both ends in the second direction, The conductor main portion has a slot and an open portion formed therein, The slot has a length in the first direction. the opening is provided on the first long edge and connects the slot and an outer side of the conductor main portion in the second direction, The first ground terminal and the second ground terminal both extend from the second long edge. To provide a multi-band antenna.

[0009] The present invention provides a second multiband antenna, which is a first multiband antenna, The multi-band antenna further includes a feed terminal, The conductor main portion has a first short edge and a second short edge at both ends in the first direction, The slots include a first slot and a second slot aligned in the first direction, the first slot is located closer to the first short edge than the second short edge in the first direction; the second slot is located closer to the second short edge than the first short edge in the first direction; the power supply terminal is provided on the first short edge side as viewed from the opening in the first direction, the first ground terminal is at least partially located on the first short edge side as viewed from the power supply terminal, The second ground terminal is at least partially located on the second short edge side as viewed from the power supply terminal. To provide a multi-band antenna.

[0010] The present invention provides a third multiband antenna, which is a second multiband antenna, The first ground terminal extends at least partially contiguous with the first short edge. To provide a multi-band antenna.

[0011] The present invention provides a fourth multiband antenna, which is the first or second multiband antenna, The first ground terminal and the second ground terminal have a portion extending in a direction intersecting the horizontal plane. To provide a multi-band antenna.

[0012] The present invention provides a fifth multiband antenna, which is the fourth multiband antenna, The power supply terminal has a portion extending in a direction intersecting a horizontal plane. To provide a multi-band antenna.

[0013] The present invention provides a sixth multiband antenna, which is the fifth multiband antenna, At least the conductor main portion and the power supply terminal are made of sheet metal, the power supply terminal has a first power supply portion and a second power supply portion, the first power supply portion protrudes into the first slot from an inner edge of the first slot, The second power supply portion extends from one end of the first power supply portion in a first direction in a direction intersecting the horizontal plane. To provide a multi-band antenna.

[0014] The present invention provides a seventh multiband antenna, which is any one of the first to sixth multiband antennas, The multi-band antenna further comprises a radiating element; The radiating element has a first portion and a second portion, the first portion extends from the first long edge away from the slot in the second direction; the second portion extends from the first portion in 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, The second length is greater than the first length. To provide a multi-band antenna.

[0015] The present invention provides an eighth multiband antenna, which is a seventh multiband antenna, The first portion is located closer to the first slot than to the second slot. To provide a multi-band antenna.

[0016] The present invention provides a ninth multiband antenna, which is an eighth multiband antenna, The first portion is at least partially located closer to the opening than the center of the slot in the first direction. To provide a multi-band antenna.

[0017] The present invention provides a tenth multiband antenna, which is any one of the seventh to ninth multiband antennas, The radiating element is bent to have a first radiating portion extending in the horizontal plane and a second radiating portion extending from the first radiating portion in a direction intersecting the horizontal plane. To provide a multi-band antenna.

[0018] The present invention provides an eleventh multiband antenna, which is any one of the first to tenth multiband antennas, The multi-band antenna further comprises a stub; The conductor main portion has a connection portion and an opposing portion, The connection portion and the opposing portion are positioned across the slot in the second direction, One end of the stub is connected to the connection portion, The other end of the stub is located away from the facing portion and faces the facing portion. To provide a multi-band antenna.

[0019] The present invention provides a twelfth multiband antenna, which is any one of the first to eleventh multiband antennas, The multiband antenna further includes an extension extending from the conductor main portion in a direction intersecting the horizontal plane. To provide a multi-band antenna.

[0020] The present invention provides a thirteenth multiband antenna, which is the twelfth multiband antenna, The multi-band antenna further includes an additional extension extending from the extension in a direction intersecting the extension. To provide a multi-band antenna. Effect of the Invention

[0021] The multiband antenna of the present invention has a first ground terminal and a second ground terminal extending from a second long edge of the conductor main part. This makes it possible to use an external host conductor, and the multiband antenna itself can be made smaller. Furthermore, by appropriately setting the positions of the first ground terminal and the second ground terminal, high radiation efficiency can be achieved. [Brief description of the drawings]

[0022] [Figure 1] 1 is a plan view showing a multiband antenna according to an embodiment of the present invention; [Diagram 2] 1. FIG. 4 is a plan view showing a first modified example of the multiband antenna of FIG. [Diagram 3] 1. FIG. 4 is a plan view showing a second modified example of the multiband antenna of FIG. [Figure 4] 1. FIG. 4 is a perspective view showing a third modified example of the multiband antenna of FIG. [Diagram 5] 1. FIG. 4 is a perspective view showing a fourth modified example of the multiband antenna of FIG. [Figure 6] 1. FIG. 4 is a perspective view showing a fifth modified example of the multiband antenna of FIG. [Figure 7] 1. FIG. 4 is a perspective view showing a sixth modified example of the multiband antenna of FIG. [Figure 8] 1. FIG. 4 is a perspective view showing a seventh modified example of the multiband antenna of FIG. [Figure 9] 1. FIG. 4 is a perspective view showing an eighth modified example of the multiband antenna of FIG. [Figure 10] FIG. 13 is a perspective view showing a ninth modification of the multiband antenna of FIG. [Figure 11] FIG. 15 is a perspective view showing a tenth modification of the multiband antenna of FIG. [Figure 12] FIG. 13 is a perspective view showing an eleventh modification of the multiband antenna of FIG. [Figure 13] FIG. 23 is a perspective view showing a twelfth modified example of the multiband antenna of FIG. [Figure 14]FIG. 21 is a perspective view showing a thirteenth modified example of the multiband antenna of FIG. [Figure 15] FIG. 21 is a perspective view showing a fourteenth modified example of the multiband antenna of FIG. [Figure 16] FIG. 21 is a perspective view showing a fifteenth modification of the multiband antenna of FIG. [Figure 17] 9 is a perspective view showing a modified example of the multiband antenna of FIG. 8. [Figure 18] FIG. 1 is a plan view showing an antenna device described in Patent Document 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Referring to FIG. 1, a multi-band antenna 10 according to an embodiment of the present invention has a conductor main portion 12, a first ground terminal 14, and a second ground terminal 16.

[0024] As shown in FIG. 1, the conductor main part 12 extends in a horizontal plane defined by a first direction and a second direction perpendicular to each other. In this embodiment, the first direction is the X direction, and the second direction is the Y direction. More specifically, the conductor main part 12 has a rectangular shape with a long side in the first direction. The conductor main part 12 has a first short edge 121 and a second short edge 123 at both ends in the first direction, and a first long edge 125 and a second long edge 127 at both ends in the second direction. However, the present invention is not limited to this. Each of the first short edge 121, the second short edge 123, the first long edge 125, and the second long edge 127 does not have to be linear.

[0025] As shown in FIG. 1, the conductor main part 12 has a slot 130 and an open part 136. The slot 130 has a rectangular shape with a longitudinal direction in the first direction. The slot 130 is away from all 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 is not open at each of the first short edge 121, the second short edge 123, the first long edge 125, and the second long edge 127. In this embodiment, the center M of the slot 130 in the first direction coincides with the center of the conductor main part 12 in the first direction. In addition, in the second direction, the slot 130 is closer to the first long edge 125 than the second long edge 127. However, the present invention is not limited to this. The position of the slot 130 with respect to the conductor main part 12 can be set arbitrarily according to the desired characteristics.

[0026] 1 , the opening 136 is provided at the first long edge 125 of the conductor main part 12. More specifically, the opening 136 connects the slot 130 and the outside of the conductor main part 12 in the second direction. In other words, the opening 136 extends from the slot 130 in the +Y direction and is open at the first long edge 125 of the conductor main part 12.

[0027] 1, the slot 130 has a first slot 132 and a second slot 134 separated by an opening 136. The first slot 132 and the second slot 134 are aligned in a first direction. More specifically, the first slot 132 is located closer to the first short edge 121 than the second short edge 123 in the first direction, and the second slot 134 is located closer to the second short edge 123 than the first short edge 121 in the first direction.

[0028] 1, the size of the first slot 132 and the size of the second slot 134 are different from each other in the first direction. More specifically, the size of the first slot 132 is larger than the size of the second slot 134 in the first direction. The sizes of the first slot 132 and the second slot 134 in the first direction are each determined based on a desired resonant frequency. In this embodiment, the first resonant frequency of the first slot 132 and the second resonant frequency of the second slot 134 are different from each other.

[0029] 1, the first ground terminal 14 and the second ground terminal 16 extend from the second long edge 127 of the conductor main portion 12. In the present embodiment, the first ground terminal 14 and the second ground terminal 16 extend in the -Y direction along the second direction.

[0030] As shown in FIG. 1, in this embodiment, the first ground terminal 14 and the second ground terminal 16 each have a substantially square shape. The first ground terminal 14 has a first edge 141, a second edge 143, and a third edge 145, and the second ground terminal 16 has a first edge 161, a second edge 163, and a third edge 165. However, the present invention is not limited to this. The first ground terminal 14 and the second ground terminal 16 each may have a rectangular shape with a long side in the first direction or the second direction. The first ground terminal 14 and the second ground terminal 16 may have different shapes from each other. Furthermore, the second edge 143 or 163 of the first ground terminal 14 and the second ground terminal 16 may have one or more recesses or cutouts.

[0031] 1, during use, power is fed to the multiband antenna 10 across the first slot 132. Therefore, the multiband antenna 10 has a feed point 18 on the edge of the first slot 132. In the first direction, the feed point 18 is located on the first short edge 121 side as viewed from the open portion 136.

[0032] 1, in the first direction, first ground terminal 14 is at least partially located on the first short edge 121 side as viewed from power feed point 18. In the present embodiment, first ground terminal 14 is entirely located on the first short edge 121 side as viewed from power feed point 18. However, the present invention is not limited to this. First ground terminal 14 may also be partially located on the second short edge 123 side as viewed from power feed point 18.

[0033] As shown in FIG. 1, in this embodiment, the first ground terminal 14 extends in the −Y direction along the second direction so as to be continuous with the first short edge 121. In other words, in this embodiment, the position of the first edge 141 of the first ground terminal 14 in the first direction coincides with the position of the first short edge 121. However, the present invention is not limited to this. In the present invention, the first edge 141 of the first ground terminal 14 may be spaced away from the first short edge 121 toward the second short edge 123. However, the radiation efficiency is higher when the position of the first edge 141 of the first ground terminal 14 in the first direction coincides with the position of the first short edge 121 than when this does not happen. Therefore, it is preferable that the first ground terminal 14 extends so as to be at least partially continuous with the first short edge 121.

[0034] 1, in this embodiment, second ground terminal 16 is located on the second short edge 123 side when viewed from power supply point 18. More specifically, second ground terminal 16 is located partially on the second short edge 123 side when viewed from open portion 136. However, the present invention is not limited to this. Second ground terminal 16 may be located entirely on the second short edge 123 side when viewed from open portion 136.

[0035] The multiband antenna 10 in FIG. 1 may be formed, for example, by punching a metal sheet (conductor plate). Alternatively, the conductor main portion 12 may be formed of a metal sheet, and the first ground terminal 14 and the second ground terminal 16 may be formed of a separate member such as a copper tape. Alternatively, the multiband antenna 10 may be formed by patterning a conductor layer (not shown) formed on a dielectric substrate (not shown). In any case, the multiband antenna 10 is connected to a host conductor (80, see FIGS. 6-8) when used. More specifically, when the multiband antenna 10 is used, the first ground terminal 14 and the second ground terminal 16 are connected to the host conductor. When at least the conductor main portion 12 of the multiband antenna 10 is made of a metal sheet, the host conductor may be a conductor layer formed on a substrate on which the multiband antenna 10 is mounted. When the multiband antenna 10 is made of a conductor layer included in a multilayer substrate, the host conductor may be the same as or a different conductor layer (for example, a ground plane) from the conductor layer on which the multiband antenna 10 is formed. However, the present invention is not limited thereto. The host conductor may be a metal housing of a communication device including the multiband antenna 10, a metal plate for heat dissipation, or the like.

[0036] According to this embodiment, the multiband antenna 10 utilizes an external host conductor (80, see Figs. 6-8), so that the antenna itself can be made smaller. In addition, by appropriately arranging the first ground terminal 14 and the second ground terminal 16, high radiation efficiency can be achieved.

[0037] Although one embodiment of the present invention has been described above, the multiband antenna 10 according to this embodiment may be modified as follows. In the following description, the same or similar components are denoted by the same or similar reference symbols, and the description thereof will be omitted.

[0038] (First Modification) 2, a multiband antenna 10A according to a first modified example further includes a radiating element 20 in addition to the configuration of the multiband antenna 10 in FIG.

[0039] 2, in this modification, 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 with a longer side in the second direction. The second portion 24 of the radiating element 20 has a rectangular shape with a longer side in the first direction.

[0040] 2, the first portion 22 of the radiating element 20 extends from the first long edge 125 of the conductor main portion 12 away from the slot 130 in the second direction. Also, the second portion 24 of the radiating element 20 extends from the first portion 22 in the −X direction along the first direction.

[0041] 2, the first portion 22 of the radiating element 20 has a first length L1 in the second direction, and the second portion 24 of the radiating element 20 has a second length L2 in the first direction. In this modification, the second length L2 is set to be longer than the first length L1. The first length L1 and the second length L2 are determined based on a third resonant frequency of the radiating element 20.

[0042] As shown in FIG. 2, the first portion 22 of the radiating element 20 is located closer to the first slot 132 than the second slot 134. The first portion 22 is located at least partially closer to the open portion 136 than the center M of the slot 130 in the first direction. More specifically, the first portion 22 has a first edge 221, a second edge 223, and a third edge 225. 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 this modification, the position of the first edge 221 of the first portion 22 in the first direction is closer to the center M of the slot 130 than the first short edge 121.

[0043] As shown in FIG. 2, the second portion 24 of the radiating element 20 has a first edge 241, a second edge 243, and a third edge 245. In this modification, the position of the first edge 241 of the second portion 24 in the second direction coincides with the position of the second edge 223 of the first portion 22. In addition, in this modification, the second portion 24 is away from the first long edge 125 of the conductor main portion 12. In other words, the size of the second portion 24 in the second direction is smaller than the first length L1 of the first portion 22. In the first direction, the position of the second edge 243 of the second portion 24 is located between the second short edge 123 and the open portion 136 of the conductor main portion 12.

[0044] (Second Modification) Referring to FIG. 3, the multiband antenna 10B according to the second modification includes a radiating element 20B having a shape different from that of the radiating element 20 of the multiband antenna 10A according to the first modification.

[0045] 3, the radiating element 20B has a first portion 22B and a second portion 24. In this modification, the first portion 22B has a rectangular shape having a longitudinal direction in a first direction. In the first direction, the position of a first edge 221B of the first portion 22B coincides with the position of a first short edge 121 of the conductor main portion 12.

[0046] Each of the multiband antennas 10, 10A, and 10B shown in Fig. 1 to Fig. 3 is configured to be planar. However, the present invention is not limited to this. Not limited The multiband antenna of the present invention may be configured three-dimensionally as in the following third to fifteenth modified examples. Each of the three-dimensional multiband antennas may be formed, for example, by punching and bending a single metal plate. However, the present invention is not limited to this. Each of the multiband antennas may be formed by combining a plurality of conductive plates. Furthermore, if necessary, one or more conductive plates may be combined with a support body made of, for example, insulating resin in order to increase strength.

[0047] (Third Modification) 4, a multiband antenna 10C according to the third modified example has a conductor main portion 12, a first ground terminal 14C, and a second ground terminal 16C, similar to the multiband antenna 10 of FIG.

[0048] 4, the first ground terminal 14C and the second ground terminal 16C have a portion that extends from the second long edge 127 of the conductor main portion 12 in a direction intersecting with the conductor main portion 12 or a horizontal plane. In this modification, the first ground terminal 14C and the second ground terminal 16C entirely extend downward along the up-down direction. In this modification, the up-down direction is the Z direction. The +Z direction is upward, and the -Z direction is downward.

[0049] As can be inferred from FIGS. 6 to 8, the multiband antenna 10C in FIG. 4 has a portion extending in a direction intersecting the conductor main portion 12 or the horizontal plane, and therefore has a vertically extending occupancy It is possible to increase the distance from the conductor main portion 12 to the host conductor 80 without increasing the area. This makes it possible for the multiband antenna 10C to be less susceptible to the influence of the host conductor 80.

[0050] (Fourth Modification) 5, the multiband antenna 10D according to the fourth modification is similar to the multiband antenna 10B according to the second modification, except that the multiband antenna 10D includes a first ground terminal 14C and a second ground terminal 16C that extend downward, similar to the multiband antenna 10C according to the third modification.

[0051] Although each of the multiband antennas 10, 10A-10D described above feeds power to the feed point 18, the multiband antenna of the present invention may further include a feed terminal 30 or 30F as in the fifth to seventh modified examples. As described later, by having a portion where the feed terminal 30 or 30F intersects with the horizontal plane, each of the multiband antennas 10E-10G can be connected to a surface of a circuit board (not shown) that is an object. implementation This will be possible.

[0052] (Fifth Modification) 6, a multiband antenna 10E according to the fifth modified example further includes a power feeding terminal 30 in addition to the configuration of the multiband antenna 10D according to the fourth modified example.

[0053] As shown in FIG. 6, the power supply terminal 30 has a rectangular shape and is provided on the conductor main part 12. More specifically, the conductor main part 12 has an opposing part 1250 and a connection part 1270 positioned on either side of the slot 130, and the power supply terminal 30 is provided on the opposing part 1250. More specifically, the power supply terminal 30 has a part extending from the inner edge of the first slot 132 defined by the opposing part 1250 in a direction intersecting with the horizontal plane. In this modification, the power supply terminal 30 extends downward as a whole. Here, the opposing part 1250 is a part located between the first long edge 125 of the conductor main part 12 and the slot 130, and the connection part 1270 is a part located between the second long edge 127 of the conductor main part 12 and the slot 130. In this modification, the power supply terminal 30 is made of the same sheet metal as the conductor main part 12.

[0054] 6, the power supply terminal 30 is provided on the first short edge 121 side as viewed from the open portion 136 in the first direction. The first ground terminal 14C is at least partially located on the first short edge 121 side as viewed from the power supply terminal 30, and the second ground terminal 16C is at least partially located on the second short edge 123 side as viewed from the power supply terminal 30. In this modification, the entire first ground terminal 14C is located on the first short edge 121 side as viewed from the power supply terminal 30, and the entire second ground terminal 16C is located on the second short edge 123 side as viewed from the power supply terminal 30.

[0055] 6, when the power supply terminal 30 is mounted on an object (not shown), it is connected to a power supply line 70 formed on the object. In addition, the first ground terminal 14C and the second ground terminal 16C are both connected to a host conductor 80. The object is, for example, a multilayer substrate. The power supply line 70 and the host conductor 80 are formed using the same or different conductive layers included in the multilayer substrate.

[0056] (Sixth Modification) 7, a multiband antenna 10F according to the sixth modified example includes a power feed terminal 30F having a different shape from the power feed terminal 30 of the multiband antenna 10E according to the fifth modified example.

[0057] 7, the power supply terminal 30F has a first power supply portion 32 and a second power supply portion 34. The first power supply portion 32 extends in a horizontal plane from the opposing portion 1250 of the conductor main portion 12. The second power supply portion 34 extends from one end of the first power supply portion 32 in the first direction in a direction intersecting the horizontal plane. In this modification, the first power supply portion 32 extends in the -Y direction from the inner edge of the first slot 132 and protrudes into the first slot 132. The second power supply portion 34 extends downward from the edge of the first power supply portion 32 on the -X side.

[0058] As can be seen from a comparison between Fig. 6 and Fig. 7, the power supply terminal 30 of the multiband antenna 10E in Fig. 6 needs to be formed separately from the conductor main part 12 and then connected to the conductor main part 12. This modified example The feed terminal 30F of the multiband antenna 10F can be formed by cutting and bending the same metal plate as the conductor main portion 12. That is, the multiband antenna 10F is easier to manufacture than the multiband antenna 10E.

[0059] (Seventh Modification) 8, a multiband antenna 10G according to the seventh modification further includes a stub 40 in addition to the configuration of the multiband antenna 10F according to the sixth modification.

[0060] As shown in Fig. 8, the stub 40 is provided on the conductor main portion 12 so as to cross the slot 130. In detail, the stub 40 is connected to the power supply terminal 30F in the first direction. First short edge 121. One end of the stub 40 is connected to the connection portion 1270, and the stub 40 extends toward the facing portion 1250. The stub 40 does not reach the facing portion 1250, and the other end of the stub 40 is spaced apart from the facing portion 1250 and faces the facing portion 1250. In this modification, the stub 40 and the power supply terminal 30F are made of the same sheet metal as the conductor main portion 12. Therefore, the multiband antenna 10G is easier to manufacture than the multiband antenna 10E. However, the present invention is not limited to this. The stub 40 is arranged such that it is spaced apart from the power supply terminal 30F in the first direction. 2nd short edge 123 The position of the stub 40 in the first direction is determined based on the desired characteristics.

[0061] In each of the multiband antennas 10 and 10A-10G in Fig. 1 to Fig. 8, the conductor main part 12 is formed in a planar shape. However, the present invention is not limited to this. In the multiband antenna of the present invention, the conductor main part 12 may be configured three-dimensionally as in the following eighth to twelfth modified examples.

[0062] (Eighth Modification) 9, a multiband antenna 10H according to the eighth modified example has an extension portion 50 in addition to the configuration of the multiband antenna 10C according to the third modified example.

[0063] As shown in FIG. 9, the extension 50 has a first extension 52 and a second extension 54. The first extension 52 and the second extension 54 each have a rectangular shape with a longer side in the first direction. The first extension 52 and the second extension 54 are aligned in the first direction with the open portion 136 in between. The first extension 52 and the second extension 54 both extend from the first long edge 125 of the conductor main part 12 in a direction intersecting the horizontal plane. In this modified example, the first extension 52 and the second extension 54 extend downward. By having the extension 50, the multiband antenna 10H has a rectangular shape with a longer side in the first direction. The first extension 52 and the second extension 54 are aligned in the first direction with the open portion 136 in between. occupancyThe radiation efficiency can be improved without increasing the area.

[0064] (Ninth Modification) 10, the multiband antenna 10I according to the ninth modification has an extension 50I different from the multiband antenna 10H according to the eighth modification. 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 main portion 12.

[0065] (Tenth Modification) 11, the multiband antenna 10J according to the tenth modification has an extension 50J different from the multiband antenna 10H according to the eighth modification. The extension 50J has a rectangular shape with a longitudinal direction in the second direction, and extends from the second short edge 123 of the conductor main part 12 in a direction intersecting with the horizontal plane. In this modification, the extension 50J extends downward. However, the present invention is not limited to this, and the extension 50J may extend upward.

[0066] (Eleventh Modification) 12, the multiband antenna 10K according to the eleventh modification further includes an extension portion 50J in addition to the configuration of the multiband antenna 10D according to the fourth modification. However, the present invention is not limited to this, and the extension portion 50J may extend upward.

[0067] (Twelfth Modification) 13, the multiband antenna 10L according to the twelfth modification further includes an additional extension 60 in addition to the configuration of the multiband antenna 10H according to the eighth modification. The additional extension 60 includes a first additional extension 62 and a second additional extension 64. The first additional extension 62 and the second additional extension 64 each have a rectangular shape with a longitudinal axis in the first direction. The first additional extension 62 and the second additional extension 64 extend in the -Y direction along the second direction from the lower edges of the first extension 52 and the second extension 54. By including the additional extension 60, the multiband antenna 10L has a occupancyThe radiation efficiency can be improved without increasing the area.

[0068] In each of the multiband antennas 10D-10G according to the fourth to seventh modifications described above, the radiating element 20 is formed in a plane. However, the present invention is not limited to this. In the multiband antenna of the present invention, the radiating element 20 may be formed three-dimensionally, as in the following thirteenth to fifteenth modifications. This makes it possible to increase the radiation efficiency without increasing the area occupied by the antenna when viewed in the vertical direction.

[0069] (13th Modification) Referring to FIG. 13th The multiband antenna 10M according to the modification has a radiating element 20M having a shape different from that of the radiating element 20 of the multiband antenna 10D according to the fifth modification.

[0070] 14, the radiating element 20M is bent along 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 the second direction in a direction intersecting the horizontal plane. In this modification, the second radiating portion 2020 extends downward.

[0071] (14th Modification) Referring to FIG. 14th The multiband antenna 10N according to the modification has a radiating element 20N having a shape different from that of the radiating element 20M of the multiband antenna 10M according to the thirteenth modification.

[0072] 15, the radiating element 20N is bent along 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 the edge of the first radiating portion 2010 in the second direction.

[0073] (Fifteenth Modification) 16, the multiband antenna 10O according to the 15th modification has a radiating element 20O having a shape different from that of the radiating element 20M of the multiband antenna 10M according to the 13th modification. The radiating element 20O has a third radiating portion 2030 in addition to the first radiating portion 2010 and the second radiating portion 2020.

[0074] 16, the third radiating portion 2030 extends from the lower edge of the second radiating portion 2020 in a direction intersecting with the second radiating portion 2020. In this modification, the third radiating portion 2030 extends in the -Y direction along the second direction. By having the third radiating portion 2030, it is possible to further increase the radiation efficiency of the radiating element 20O.

[0075] Although the present invention has been described above by way of the embodiment, the present invention is not limited to the above embodiment, and various modifications and changes are possible without departing from the spirit of the present invention. For example, the power supply terminal 30 or 30F can be applied to each of the multiband antennas 10C, 10H-10O of the third and eighth to fifteenth modified examples. Similarly, the stub 40 can be applied to each of the multiband antennas 10C, 10H-10O of the third and eighth to fifteenth modified examples.

[0076] Moreover, the shape of the stub 40 in the seventh modified example is rectangular, but the present invention is not limited to this. For example, the shape of the stub 40P may be L-shaped, as in the multiband antenna 10P shown in FIG. 17. In detail, the stub 40P extends from the connecting portion 1270 in the +Y direction along the second direction, and then further extends in the +X direction along the first direction. In the second direction, one end of the stub 40P is connected to the connecting portion 1270, and the other end is separated from the facing portion 1250 and faces the facing portion 1250. By making the shape of the stub 40P L-shaped, the electrical length of the stub 40P can be set without being limited by the size of the slot 130 in the second direction. [Explanation of symbols]

[0077] 10,10A-10P Multi-band antenna 12 Conductor main part 121 First Short Edge 123 Second Short Marriage 125 First Long Edge 127 Second Long Edge 1250 Opposite part 1270 Connection 130 Slots 132 1st Slot 134 2nd Slot 136 Open area 14,14C First ground terminal 141 First Edge 143 Second Edge 145 The Third Edge 16,16C Second ground terminal 161 First Edge 163 Second Edge 165 Third Edge 18 Power supply point 20, 20B, 20M radiating elements 22,22B 1st part 221,221B First Edge 223,223B Second Edge 225 The third edge 24,24B,24M 2nd part 241,241M First Edge 243 Second Edge 245 The third edge 2010 First Radiation Section 2020,2020N 2nd radiation section 2030 3rd Radiation Section 30,30F Power supply terminal 32 First power supply section 34 Second power supply section 40,40P stub 50,50I,50J Nobe 52,52I 1st section 54,54I 2nd section 60 Additional extension 62 First additional extension 64 Second Additional Extension 70 Power line 80 Host Conductor

Claims

1. A multi-band antenna, which in use is connected to a host conductor, the multiband antenna has a conductor main portion, a first ground terminal, and a second ground terminal; the conductor main portion has a longitudinal direction in a first direction and extends within 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 host conductor when the multiband antenna is used; The conductor main portion has a first long edge and a second long edge at both ends in the second direction, The conductor main portion has a slot and an open portion formed therein, The slot has a length in the first direction. the opening is provided on the first long edge and connects the slot and an outer side of the conductor main portion in the second direction, The first ground terminal and the second ground terminal both extend from the second long edge. The multi-band antenna further includes a feed terminal, The conductor main portion has a first short edge and a second short edge at both ends in the first direction, The slots include a first slot and a second slot aligned in the first direction, the first slot is located closer to the first short edge than the second short edge in the first direction; the second slot is located closer to the second short edge than to the first short edge in the first direction; the power supply terminal is provided on the first short edge side as viewed from the opening in the first direction, the first ground terminal is at least partially located on the first short edge side as viewed from the power supply terminal, The second ground terminal is at least partially located on the second short edge side as viewed from the power supply terminal. Multi-band antenna.

2. 2. The multi-band antenna of claim 1, The first ground terminal extends at least partially contiguous with the first short edge. Multi-band antenna.

3. The multi-band antenna according to claim 1 or 2, The first ground terminal and the second ground terminal have a portion extending in a direction intersecting the horizontal plane. Multi-band antenna.

4. 4. A multi-band antenna as claimed in claim 3, The power supply terminal has a portion extending in a direction intersecting the horizontal plane. Multi-band antenna.

5. 5. A multi-band antenna as claimed in claim 4, At least the conductor main portion and the power supply terminal are made of sheet metal, The power supply terminal has a first power supply portion and a second power supply portion, the first power supply portion protrudes into the first slot from an inner edge of the first slot, The second power supply portion extends from one end of the first power supply portion in a first direction in a direction intersecting the horizontal plane. Multi-band antenna.

6. A multi-band antenna according to any one of claims 1 to 5, The multi-band antenna further comprises a radiating element; The radiating element has a first portion and a second portion, the first portion extends from the first long edge away from the slot in the second direction; the second portion extends from the first portion in 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, The second length is greater than the first length. Multi-band antenna.

7. 7. A multi-band antenna according to claim 6, The first portion is located closer to the first slot than to the second slot. Multi-band antenna.

8. 8. A multi-band antenna as claimed in claim 7, The first portion is at least partially located closer to the opening than a center of the slot in the first direction. Multi-band antenna.

9. A multi-band antenna according to any one of claims 6 to 8, The radiating element is bent to have a first radiating portion extending in the horizontal plane and a second radiating portion extending from the first radiating portion in a direction intersecting the horizontal plane. Multi-band antenna.

10. A multi-band antenna according to any one of claims 1 to 9, The multi-band antenna further comprises a stub; The conductor main portion has a connection portion and an opposing portion, The connection portion and the opposing portion are positioned across the slot in the second direction, One end of the stub is connected to the connection portion, The other end of the stub is located away from the facing portion and faces the facing portion. Multi-band antenna.

11. A multi-band antenna according to any one of claims 1 to 10, The multiband antenna further includes an extension extending from the conductor main portion in a direction intersecting the horizontal plane. Multi-band antenna.

12. 12. A multi-band antenna as claimed in claim 11, The multi-band antenna further includes an additional extension extending from the extension in a direction intersecting the extension. Multi-band antenna.

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