Multiband antenna

Abstract

To provide a multiband antenna which allows size reduction.SOLUTION: A first slot edge part 201 and a second slot edge part 203 of a conductor main part 20 have their longitudinal sides in a first direction, and they are located with a slot 22 sandwiched therebetween in a second direction. An open part 24 is formed at a portion different from the first slot edge part 201, and it opens the slot 22 to the outside of the conductor main part 20. A first portion 301 of a radiation element 30 extends from an end 2011 of the first slot edge part 201 in the second direction. A second portion 303 of the radiation element 30 extends from an end of the first portion 301 in the first direction. An additional element 40 passes from the second portion 303 through a first specific region 70 without making contact with the conductor main part 20 and extends toward a second specific region 75. The first specific region 70 is a region which overlaps a portion of the first slot edge part 201 in a third direction, and the second specific region 75 is a region which overlaps a portion of the second slot edge part 203 in the third direction.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a multi-band antenna, and particularly to a multi-band antenna including a slot antenna and a radiating element.

Background Art

[0002] Referring to FIG. 17, a multi-band antenna 90 disclosed in Patent Document 1 includes a slot antenna 92 and a radiating element 94.

[0003] As shown in FIG. 17, a slot 921 of the slot antenna 92 has a longitudinal direction in a first direction (Y direction). The radiating element 94 has a first portion 941 and a second portion 943. The first portion 941 extends from the slot antenna 92 in a second direction (X direction) orthogonal to the first direction. The second portion 943 extends from an end of the first portion 941 in the first direction. The length of the second portion 943 is longer than the length of the first portion 941.

[0004] The multi-band antenna 90 of Patent Document 1 has two resonance frequencies (operating frequencies), namely, the resonance frequency of the slot antenna 92 and the resonance frequency of the radiating element 94. Here, the second portion 943 of the radiating element 94 extends in the first direction, and the resonance frequency of the slot antenna 92 is reduced as compared with the case where the radiating element 94 is not present. This means that by using the radiating element 94, miniaturization of the slot antenna 90 having a specific resonance frequency can be achieved.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention aims to provide a multiband antenna that can be miniaturized by employing a different structure from the multiband antenna described in Patent Document 1. [Means for solving the problem]

[0007] The present invention provides a multiband antenna comprising a conductor main portion constituting a slot antenna, a radiating element, and an additional element, as a first multiband antenna. The main conductor portion has at least a first slot edge and a second slot edge, The main conductor portion has slots and open portions formed therein. The aforementioned slot has an elongated length in the first direction, The first slot edge and the second slot edge both have an elongated length in the first direction and are positioned on either side of the slot in the second direction perpendicular to the first direction. The opening is formed in a location different from the first slot edge of the main conductor portion, and the slot is opened to the outside of the main conductor portion. The radiating element has a first portion and a second portion, The first portion extends in the second direction from the end of the first slot edge, The second portion extends from the end of the first portion in the first direction, The additional element extends from the second portion, passes through the first specific region without contacting the main conductor portion, and extends to or toward the second specific region. The first specific region is a region that overlaps with a part of the first slot edge in a third direction that is orthogonal to both the first and second directions. The second specific region is a region that overlaps with a portion of the second slot edge in the third direction. We provide multiband antennas.

[0008] Furthermore, the present invention provides a second multiband antenna, which is a first multiband antenna, The additional element extends to the second specific region and, when viewed along the third direction, partially overlaps with the edge of the second slot. We provide multiband antennas.

[0009] Furthermore, the present invention also provides a third multiband antenna, which is a second multiband antenna, The aforementioned multiband antenna further comprises additional radiating elements, The first portion extends in the second direction from the end of the first slot edge in the first direction in the first orientation, The second portion extends from the end of the first portion in a second direction which is opposite to the first direction, The additional radiating element extends from the radiating element in the first direction. We provide multiband antennas.

[0010] Furthermore, the present invention also includes a fourth multiband antenna, which is a third multiband antenna, The additional radiating element extends from the second portion of the radiating element. We provide multiband antennas.

[0011] Furthermore, the present invention provides a fifth multiband antenna, which is a first multiband antenna, The aforementioned multiband antenna further includes a ground terminal, The ground terminal extends from the edge of the second slot. We provide multiband antennas.

[0012] Furthermore, the present invention also includes a sixth multiband antenna, which is a fifth multiband antenna, The ground terminal has a portion that extends in a direction intersecting a specific plane defined by the first and second directions, The aforementioned multiband antenna further has a feed terminal, The power supply terminal has a portion that extends in a direction intersecting the specific plane. Provided is a multi-band antenna.

Effects of the Invention

[0013] In the multi-band antenna of the present invention, the additional element adjusts the impedance of the multi-band antenna, thereby enabling a lower frequency of the resonance frequency of the slot antenna. In other words, the additional element enables miniaturization of the slot antenna having a specific resonance frequency, and thus enables miniaturization of the multi-band antenna.

Brief Description of the Drawings

[0014] [Figure 1] It is a perspective view showing a multi-band antenna according to an embodiment of the present invention. [Figure 2] It is a top view showing the multi-band antenna of FIG. 1. The additional element is partially shown by a broken line. Each of the first specific region and the second specific region is shown by a two-dot chain line. [Figure 3] It is a perspective view showing a first modification of the multi-band antenna of FIG. 1. [Figure 4] It is a perspective view showing a second modification of the multi-band antenna of FIG. 1. [Figure 5] It is a perspective view showing a third modification of the multi-band antenna of FIG. 1. [Figure 6] It is a perspective view showing a fourth modification of the multi-band antenna of FIG. 1. [Figure 7] It is a perspective view showing a fifth modification of the multi-band antenna of FIG. 1. [Figure 8] It is a perspective view showing a sixth modification of the multi-band antenna of FIG. 1. [Figure 9] It is a perspective view showing a seventh modification of the multi-band antenna of FIG. 1. [Figure 10] It is a perspective view showing an eighth modification of the multi-band antenna of FIG. 1. [Figure 11] It is a perspective view showing a ninth modification of the multi-band antenna of FIG. 1. [Figure 12]Figure 1 is a perspective view showing the tenth modified example of the multiband antenna. [Figure 13] Figure 1 is a perspective view showing the 11th modified example of the multiband antenna. The conductive pattern formed on the object is indicated by dashed lines. [Figure 14] This is a top view showing the twelfth modification of the multiband antenna shown in Figure 1. Additional elements are partially indicated by dashed lines. The first and second specific regions are indicated by dotted lines, respectively. [Figure 15] This is a top view showing the 13th modification of the multiband antenna shown in Figure 1. Additional elements are partially indicated by dashed lines. The first and second specific regions are indicated by dotted lines, respectively. [Figure 16] This is a bottom view showing the 14th modified example of the multiband antenna in Figure 1. The first specific region and the second specific region are indicated by dashed lines. [Figure 17] This is a top view showing the multiband antenna described in Patent Document 1. [Modes for carrying out the invention]

[0015] Referring to Figure 1, a multiband antenna 10 according to one embodiment of the present invention comprises a main conductor portion 20, a first radiating element (radiating element) 30, and an additional element 40. In this embodiment, the multiband antenna 10 further comprises a second radiating element (additional radiating element) 50 and a ground terminal 60. However, in the present invention, the second radiating element 50 and the ground terminal 60 are not essential. Nevertheless, by providing the second radiating element 50, the multiband antenna 10 can be made wider.

[0016] As can be seen from Figure 1, the multiband antenna 10 is made of a single sheet metal. In other words, the multiband antenna 10 is formed by punching and bending a single sheet metal. However, the present invention is not limited thereto. The multiband antenna 10 may be made using multiple sheet metals. Alternatively, the multiband antenna 10 may be made at least partially using metal foil or a conductive pattern formed on a circuit board instead of sheet metal. Furthermore, the multiband antenna 10 may be made using sheet metal or metal foil and a support such as resin, as needed.

[0017] As shown in Figure 1, the main conductor portion 20 has at least a first slot edge 201 and a second slot edge 203. In this embodiment, the main conductor portion 20 further has a connecting portion 205. The first slot edge 201, the second slot edge 203, and the connecting portion 205 are connected to each other, defining a slot 22 and an open portion 24. In other words, the main conductor portion 20 has a slot 22 and an open portion 24 formed therein.

[0018] As can be seen from Figure 1, the main conductor portion 20 is located on a specific plane defined by a first direction and a second direction perpendicular to the first direction. In this embodiment, the first direction is the Y direction, and the second direction is the X direction. In this embodiment, the specific plane is the XY plane. The first direction defines a first orientation and a second orientation which is the opposite direction. In this embodiment, the first orientation is the -Y direction, and the second orientation is the +Y direction. In this embodiment, the second direction is also the front-back direction. The -X direction is forward, and the +X direction is backward.

[0019] As shown in Figure 1, both the first slot edge 201 and the second slot edge 203 have a rectangular shape with their longitudinal side in the first direction. The first slot edge 201 has an end 2011 in the first orientation in the first direction and an end 2013 in the second orientation in the first direction. The second slot edge 203 has an end 2031 in the first orientation in the first direction and an end 2033 in the second orientation in the first direction.

[0020] As shown in Figure 1, the first slot edge 201 and the second slot edge 203 are separated from each other in the second direction. The first slot edge 201 is located in front of the second slot edge 203. In the second direction, the slot 22 and the opening 24 are located between the first slot edge 201 and the second slot edge 203. Thus, the first slot edge 201 and the second slot edge 203 are located with the slot 22 and the opening 24 in between.

[0021] As shown in Figure 1, the connecting portion 205 has a rectangular shape with its longitudinal side in the second direction. The connecting portion 205 connects one end each of the first slot edge 201 and the second slot edge 203 to each other. In this embodiment, the connecting portion 205 connects the end 2013 of the first slot edge 201 and the end 2033 of the second slot edge 203.

[0022] As shown in Figure 1, the slot 22 has a longitudinal direction in the first direction. The opening 24 is located at the end of the conductor main portion 20 in the first direction. In other words, the opening 24 is located between the end 2011 of the first slot edge 201 and the end 2031 of the second slot edge 203. The opening 24 is continuous with the slot 22 and opens the slot 22 to the outside of the conductor main portion 20. In this embodiment, the opening 24 opens in the first direction in the first direction. However, the present invention is not limited thereto. The opening 24 may open forward or backward. However, even when the opening 24 opens forward or backward, the opening 24 in the present invention is formed in a location different from the first slot edge 201 of the conductor main portion 20.

[0023] As shown in Figure 1, the first radiating element 30 has a first portion 301 and a second portion 303. The first portion 301 has a rectangular shape with its longitudinal side in a second direction and is located on a specific plane. The first portion 301 extends in a second direction from the end 2011 of the first slot edge 201 in a first orientation in a first direction. In this embodiment, the first portion 301 extends backward.

[0024] As shown in Figure 1, the second portion 303 of the first radiating element 30 extends from the rear end of the first portion 301 in a second direction in the first direction. In this embodiment, the second portion 303 has an upper portion 321 and a rear portion 323. The upper portion 321 has a rectangular shape with its longitudinal side in the first direction and is located on a specific plane. The rear portion 323 has a rectangular shape with its longitudinal side in the first direction and extends from the rear edge of the upper portion 321 in a third direction perpendicular to both the first and second directions. In this invention, the rear portion 323 is not necessarily required. However, the rear portion 323 can increase the radiation efficiency of the first radiating element 30 without increasing the area occupied by the first radiating element 30 when viewed along the third direction. In this embodiment, the third direction is the Z direction. When the +Z direction is upward and the -Z direction is downward, the rear portion 323 extends downward from the upper portion 321.

[0025] As shown in Figure 1, the additional element 40 extends forward from the lower edge of the rear portion 323 of the second portion 303 of the first radiating element 30. The additional element 40 is separated from the main conductor portion 20 in the third direction and extends forward without contacting the main conductor portion 20.

[0026] Referring to Figure 2, in this embodiment, the additional element 40 has a rectangular shape. The additional element 40 is located away from both ends of the second portion 303 in the first direction. Also, in the first direction, the additional element 40 is located closer to the end of the second portion 303 in the first direction than to the end of the second direction. However, the present invention is not limited thereto. The shape and position of the additional element 40 can be arbitrarily set according to the desired antenna characteristics.

[0027] As can be seen from Figure 2, the additional element 40 passes through the first specific region 70 and extends toward the second specific region 75. In this embodiment, the additional element 40 extends to the second specific region 75. In other words, when viewed along the third direction, the additional element 40 partially overlaps with the second slot edge 203. Here, the first specific region 70 and the second specific region 75 are regions on a plane perpendicular to the third direction and located away from the specific plane in the third direction. The first specific region 70 is a region that overlaps with a part of the first slot edge 201 in the third direction. The second specific region 75 is a region that overlaps with a part of the second slot edge 203 in the third direction. In this embodiment, the additional element 40 is located on the plane that includes the first specific region 70 and the second specific region 75, and the leading edge 401 of the additional element 40 is located within the second specific region 75. However, the present invention is not limited thereto. The first specific region 70 and the second specific region 75 can be arbitrarily set based on the required antenna characteristics.

[0028] As can be seen from Figures 1 and 2, the leading edge 401 of the additional element 40 is located near the second slot edge 203. This creates a capacitance between the additional element 40 and the second slot edge 203. By setting the shape and size of the additional element 40 so that the capacitance is a desired value, the impedance of the multiband antenna 10 is adjusted, contributing to the miniaturization of the multiband antenna 10. In this embodiment, the additional element 40 extends to the second specific region 75, but the additional element 40 does not have to extend to the second specific region 75. However, a larger overlap area between the additional element 40 and the second slot edge 203 when viewed along the third direction allows for a larger capacitance to be obtained. A larger capacitance enables the realization of a lower operating frequency and allows for the miniaturization of the multiband antenna 10.

[0029] As shown in Figures 1 and 2, the second radiating element 50 is located on a specific plane and extends from the first radiating element 30 in a first direction. More specifically, the second radiating element 50 has a long portion 501 and a short portion 503. The long portion 501 has a rectangular shape with its longitudinal side in the first direction. The short portion 503 has a rectangular shape with its longitudinal side in the second direction. The long portion 501 extends in the first direction from the end of the second portion 303 of the first radiating element 30 in the first direction. The short portion 503 extends forward from the end of the long portion 501 in the first direction in the first direction. However, the present invention is not limited thereto. The second radiating element 50 may consist only of the long portion 501. However, the short portion 503 makes it possible to increase the electrical length of the second radiating element 50 without increasing the size of the second radiating element 50 in the first direction.

[0030] As shown in Figure 2, the ground terminal 60 has a rectangular shape that is elongated in the second direction. The ground terminal 60 extends forward from the front edge of the second slot edge 203. More specifically, the ground terminal 60 extends forward from the front edge of the end portion 2031 of the second slot edge 203. The edge of the ground terminal 60 in the first direction is aligned with the edge of the second slot edge 203 in the first direction. However, the present invention is not limited thereto. The shape, size, and position of the ground terminal 60 can be arbitrarily set according to desired characteristics.

[0031] The ground terminal 60 is connected to a host conductor (not shown) when in use. The host conductor is, for example, the casing (not shown) of the equipment housing the multiband antenna 10, or the ground pattern of the circuit board (not shown) on which the multiband antenna 10 is mounted. By utilizing a host conductor, the multiband antenna 10 itself can be miniaturized.

[0032] As shown in Figures 1 and 2, the main conductor section 20 includes feed points 211 and 213. In this embodiment, the feed points 211 and 213 are located closer to the connecting section 205 than to the open section 24 in the first direction. In the second direction, the feed points 211 and 213 are located on either side of the slot 22. By supplying high-frequency power between the feed points 211 and 213, the multiband antenna 10 operates as an antenna. For example, a coaxial cable (not shown) can be used to supply high-frequency power to the feed points 211 and 213.

[0033] The multiband antenna 10 has multiple operating frequencies. Specifically, it has three operating frequencies, each depending on the main conductor 20, the first radiating element 30, and the second radiating element 50. The electrical length of the first radiating element 30 and the second radiating element 50 is equal to 1 / 4 of the wavelength of the corresponding operating frequency. The electrical lengths of the first radiating element 30 and the second radiating element 50 are different from each other. For example, the electrical length of the second radiating element 50 is longer than that of the first radiating element 30. As a result, the second radiating element 50 can achieve a lower operating frequency than the first radiating element 30. The operating frequency dependent on the main conductor 20 is affected by the first radiating element 30, the second radiating element 50, and the ground terminal 60, respectively, and is lower than the resonant frequency of the main conductor 20 alone. Therefore, when achieving a specific operating frequency, the first radiating element 30, the second radiating element 50, and the ground terminal 60 each contribute to the miniaturization of the multiband antenna 10. The additional element 40 adjusts the impedance of the multiband antenna 10, contributing to lowering the operating frequency of the multiband antenna 10 or miniaturizing the multiband antenna 10.

[0034] The multiband antenna 10 according to one embodiment of the present invention has been described above, but the multiband antenna 10 may be modified as follows. In each of the following modifications, components that are the same or similar as those in the multiband antenna 10 are denoted by the same or similar reference numerals, and their descriptions are omitted.

[0035] (First variation) Referring to Figure 3, the first modified multiband antenna 10A differs from the multiband antenna 10 of the embodiment (see Figure 1) in that the positions of the feed points 211A and 213A are different from the positions of the feed points 211 and 213 (see Figure 1).

[0036] As shown in Figure 3, the positions of the feed points 211A and 213A are closer to the open portion 24 than to the connecting portion 205 in the first direction. Thus, in the present invention, the positions of the feed points 211 and 213 (or 211A and 213A) can be changed according to the desired antenna characteristics.

[0037] (Second variation) Referring to Figure 4, the second modified multiband antenna 10B differs from the first modified multiband antenna 10A (see Figure 3) in that the shape of the additional element 40B is different from the shape of the additional element 40 (see Figure 3).

[0038] As shown in Figure 4, the additional element 40B has an L-shape when viewed along the third direction. The size of the leading edge 401B of the additional element 40B in the first direction is larger than the size of the leading edge 401 of the additional element 40. This allows the capacitance between the additional element 40B and the second slot edge 203 to be larger than the capacitance between the additional element 40 and the second slot edge 203. The larger capacitance enables the realization of lower operating frequencies and allows for miniaturization of the multiband antenna 10B.

[0039] (Third variation) Referring to Figure 5, the third modified example of the multiband antenna 10C differs from the multiband antenna 10 of the embodiment (see Figure 1) in that it has a ground terminal 60C that has a portion extending in a direction intersecting a specific plane (XY plane).

[0040] As shown in Figure 5, in this modified example, the ground terminal 60C is a rectangular flat plate, and its entirety extends downward from the front edge of the second slot edge 203. However, the present invention is not limited thereto. The ground terminal 60C may extend forward from the front edge of the second slot edge 203 and then extend in a direction intersecting a specific plane. In that case, the portion extending in the direction intersecting the specific plane may be located on a plane perpendicular to the first direction or on a plane perpendicular to the second direction.

[0041] (Fourth variation) Referring to Figure 6, the fourth modified multiband antenna 10D differs from the third modified multiband antenna 10C (see Figure 5) in that the position of the ground terminal 60D is different from the position of the ground terminal 60C (see Figure 5).

[0042] As shown in Figure 6, in this modified example, the ground terminal 60D is located away from both ends of the second slot edge 203 in the first direction. Also, in the first direction, the ground terminal 60D is closer to the open portion 24 than to the connecting portion 205. Thus, in the present invention, the position of the ground terminal 60 (60C, 60D) can be changed according to the desired antenna characteristics.

[0043] (Fifth variation) Referring to Figure 7, the fifth modified example of the multiband antenna 10E differs from the third modified example of the multiband antenna 10C (see Figure 5) in that it has an additional ground terminal 60E in addition to the ground terminal 60C.

[0044] As shown in Figure 7, in this modified example, the additional ground terminal 60E extends downward from the leading edge of the end portion 2033 of the second slot edge 203. The additional ground terminal 60E contributes to improving the reliability of the multiband antenna 10E. Thus, the multiband antenna of the present invention can be equipped with any number of ground terminals.

[0045] (Sixth variation) Referring to Figure 8, the sixth modified multiband antenna 10F differs from the third modified multiband antenna 10C (see Figure 5) in that the shape of the second radiating element 50F is different from that of the second radiating element 50 (see Figure 5). Specifically, in the multiband antenna 10F, the second radiating element 50F has an extension 505 in addition to the long part 501 and the short part 503.

[0046] As shown in Figure 8, the extension 505 extends from the front end of the short portion 503 in a second direction. The extension 505 makes it possible to increase the electrical length of the second radiating element 50F without increasing the size of the second radiating element 50F in the first direction. Thus, in the present invention, the shape of the second radiating element 50 (or 50F) can be changed according to the desired antenna characteristics.

[0047] (Seventh variation) Referring to Figure 9, the seventh modified multiband antenna 10G differs from the sixth modified multiband antenna 10F (see Figure 8) in that the shape of the second radiating element 50G is different from that of the second radiating element 50F (see Figure 8). More specifically, in the multiband antenna 10G, the second radiating element 50G has a vertical section 507 in addition to the configuration of the second radiating element 50F.

[0048] As shown in Figure 9, the vertical portion 507 extends downward from the trailing edge of the elongated portion 501. In the first direction, the size of the vertical portion 507 is smaller than the size of the elongated portion 501. The vertical portion 507 contributes to improving the strength and radiation characteristics of the second radiating element 50G. Thus, in the present invention, the shape of the second radiating element 50 (50F or 50G) can be changed according to the desired antenna characteristics.

[0049] (Variation 8) Referring to Figure 10, the eighth modified multiband antenna 10H differs from the seventh modified multiband antenna 10H (see Figure 9) in that it includes a third radiating element 53.

[0050] As shown in Figure 10, the third radiating element 53 has an additional length 531, an additional short length 533, and an additional extension 535. The third radiating element 53 is configured substantially the same as the second radiating element 50G. The additional length 531 is connected to the lower edge of the vertical section 507. When viewed along the third direction, the third radiating element 53 overlaps with the second radiating element 50G. In this way, the multiband antenna of the present invention allows for arbitrary setting of the number of radiating elements (passive antennas), i.e., the number of operating frequencies (or operating frequency bands).

[0051] (9th variation) Referring to Figure 11, the ninth modified multiband antenna 10I differs from the third modified multiband antenna 10C (see Figure 5) in that it includes a fourth radiating element 55.

[0052] As shown in Figure 11, the fourth radiating element 55 has a rectangular shape with its longitudinal side in a first direction. The fourth radiating element 55 extends in a first direction from the end 2011 of the first slot edge 201. In the first direction, the size of the fourth radiating element 55 is less than half the length 501 of the second radiating element 50. However, the present invention is not limited thereto. The shape and size of the fourth radiating element 55 can be arbitrarily set according to the desired antenna characteristics.

[0053] (10th variation) Referring to Figure 12, the tenth modified multiband antenna 10J differs from the third modified multiband antenna 10C (see Figure 5) in that it is equipped with a fifth radiating element 57.

[0054] As shown in Figure 12, the fifth radiating element 57 has a rectangular shape with its longitudinal side in the first direction. The fifth radiating element 57 extends in the first direction from the end 2031 of the second slot edge 203. In the first direction, the size of the fifth radiating element 57 is less than half the length 501 of the second radiating element 50. However, the present invention is not limited thereto. The shape and size of the fifth radiating element 57 can be arbitrarily set according to the desired antenna characteristics.

[0055] (11th variation) Referring to Figure 13, the 11th modified multiband antenna 10K differs from the 5th modified multiband antenna 10E (see Figure 7) in that it is equipped with a feed terminal 62.

[0056] As shown in Figure 13, the power supply terminal 62 has a portion that extends in a direction intersecting a specific plane. In this modified example, the power supply terminal 62 is a rectangular flat plate, and its entirety extends downward from the front edge of the first slot edge 201. However, the present invention is not limited thereto. The power supply terminal 62 may extend forward from the front edge of the first slot edge 201 and then extend in a direction intersecting a specific plane. In that case, the portion that extends in a direction intersecting a specific plane may be located on a plane perpendicular to the first direction or on a plane perpendicular to the second direction.

[0057] As can be seen from Figure 13, in the third direction, the size of the feed terminal 62 is equal to the size of the ground terminal 60 and the additional ground terminal 60E. This allows the multiband antenna 10K to be surface-mounted on an object (not shown) such as a circuit board. For example, if the object has conductor patterns 80 corresponding to the feed terminal 62, ground terminal 60, and additional ground terminal 60E, the feed terminal 62, ground terminal 60, and additional ground terminal 60E can be connected to the corresponding conductor patterns 80, respectively.

[0058] (12th variation) Referring to Figure 14, the twelfth modified multiband antenna 10L further differs from the multiband antenna 10 according to the embodiment (see Figure 2) in that it has a first extension slot edge portion 207.

[0059] As shown in Figure 14, the first extended slot edge 207 has an L-shape when viewed along the third direction. Specifically, the first extended slot edge 207 extends in the first direction from the end 2011 of the first slot edge 201, and then extends forward. In this modified example, the opening 24L is formed in a different location from the first slot edge 201 of the main conductor portion 20. Specifically, the opening 24L is located between the front edge of the second slot edge 203 and the front edge of the first extended slot edge 207, and opens forward.

[0060] (13th variation) Referring to Figure 15, the 13th modified multiband antenna 10M further differs from the multiband antenna 10 according to the embodiment (see Figure 2) in that it has a first extension slot edge 207M and a second extension slot edge 209.

[0061] As shown in Figure 15, the first extension slot edge 207M has a rectangular shape and extends in a first direction from the end 2011 of the first slot edge 201. The second extension slot edge 209 has an inverted L-shape when viewed along a third direction. Specifically, the second extension slot edge 209 extends in a first direction from the end 2031 of the second slot edge 203, and then extends rearward. In this modified example, the opening 24M is formed in a different location from the first slot edge 201 of the conductor main portion 20. Specifically, the opening 24M is located between the rear edge of the first extension slot edge 207M and the rear edge of the second extension slot edge 209, and opens towards the rear.

[0062] (14th variation) Referring to Figure 16, the 14th modified multiband antenna 10N differs from the embodiment's multiband antenna 10 (see Figure 2) in that the shape of the additional element 40N is different from that of the additional element 40 (see Figure 2). However, the additional element 40N in this modified example is similar to the additional element 40 in that it passes through the first specific region 70 and extends toward the second specific region 75.

[0063] More specifically, as shown in Figure 16, the additional element 40N of this modified example has a crank shape when viewed along the third direction. More specifically, the additional element 40N of this modified example extends forward from the lower end of the rear portion 323 of the first radiating element 30, extends in the first direction, and then extends further forward. The first specific region 70 and the second specific region 75 are planes perpendicular to the third direction and are regions on a plane away from the specific plane in the third direction. The first specific region 70 is a region that overlaps with a part of the first slot edge 201 in the third direction. The second specific region 75 is a region that overlaps with a part of the second slot edge 203 in the third direction. In this embodiment, the additional element 40N is located on the plane that includes the first specific region 70 and the second specific region 75, and the leading edge 401N of the additional element 40N is located within the second specific region 75. The additional element 40N forms a capacitance with the second slot edge 203, adjusting the impedance of the multiband antenna 10N, thereby contributing to lowering the operating frequency of the multiband antenna 10N or miniaturizing the multiband antenna 10N.

[0064] Although the present invention has been described above with reference to embodiments, the present invention is not limited to the embodiments described above, and various modifications and changes are possible without departing from the spirit of the present invention. For example, each of the components of Modification 1-14 may be appropriately selected and combined. [Explanation of Symbols]

[0065] 10, 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10H, 10I, 10J, 10K, 10L, 10M, 10N Multiband Antenna 20 Main conductor section 201 First slot edge 2011, 2013 End 203 Second slot edge 2031, 2033 End 205 Connecting part 207,207M First extension slot edge 209 Second extension slot edge 211, 213, 211A, 213A power supply point 22 slots 24,24L,24M Open part 30. First radiating element (radiating element) 301 Part 1 303 Part 2 321 Top 323 Rear 40, 40B, 40N Additional elements 401, 401B, 401N leading edge 50, 50F, 50G Second radiating element (additional radiating element) 501 Osabe 503 Short section 505 Extension 507 Vertical section 53 Third radiating element 531 Additional length 533 Additional short section 535 Additional extension 55 Fourth radiating element 57 Fifth radiating element 60, 60C, 60D Ground terminal 60E Additional ground terminal 62 Power supply terminals 70 1st specific area 75 Second specific area 80 Conductor Patterns

Claims

1. A multi-band antenna comprising a conductor main portion constituting a slot antenna, a radiating element, and an additional element, the conductor main portion has at least a first slot edge and a second slot edge; The conductor main portion has a slot and an open portion formed therein, The slot has a length in a first direction; the first slot edge portion and the second slot edge portion both have a longitudinal direction in the first direction and are positioned on opposite sides of the slot in a second direction perpendicular to the first direction, the opening is formed at a position different from the first slot edge portion of the conductor main portion, and opens the slot to the outside of the conductor main portion, the radiating element has a first portion and a second portion; the first portion extends in the second direction from an end of the first slot edge; the second portion extends in the first direction from an end of the first portion, the additional element extends from the second portion, passes through the first specific region without contacting the conductor main portion, and extends to or toward the second specific region; the first specific region is a region overlapping with a portion of the first slot edge portion in a third direction perpendicular to both the first direction and the second direction, The second specific region is a region that overlaps with a part of the second slot edge portion in the third direction. Multi-band antenna.

2. 2. The multi-band antenna according to claim 1, The additional element extends to the second specific region and partially overlaps the second slot edge when viewed along the third direction. Multi-band antenna.

3. 3. The multi-band antenna according to claim 2, the multi-band antenna further comprises an additional radiating element; the first portion extends in the second direction from an end of the first slot edge portion in a first orientation in the first direction, the second portion extends from the end of the first portion in a second direction opposite to the first direction, The additional radiating element extends from the radiating element in the first direction. Multi-band antenna.

4. 4. The multi-band antenna according to claim 3, The additional radiating element extends from the second portion of the radiating element. Multi-band antenna.

5. 2. The multi-band antenna according to claim 1, the multi-band antenna further includes a ground terminal; The ground terminal extends from the second slot edge. Multi-band antenna.

6. 6. The multi-band antenna according to claim 5, the ground terminal has a portion extending in a direction intersecting a specific plane defined by the first direction and the second direction, the multiband antenna further has a feed terminal; The power supply terminal has a portion extending in a direction intersecting the specific plane. Multi-band antenna.

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