Multi-resonant antenna

Abstract

Topic: To provide an antenna with a structure that resonates at multiple operating frequencies. Solution: The complex resonant antenna 10 system includes a main antenna 30 and an additional transmitting element 270. The main antenna 30 system includes: a main part 320 forming a segmented ring; and a power supply part 210, which is configured to extend outward from the autonomous part 320. The additional transmitting element 270 extends directly from the power supply part 210 outward from the main antenna 30.

Description

Complex Resonant Antenna The present invention relates to a complex resonant antenna. Patent Document 1 discloses a small and broadband antenna 900. As shown in FIG. 8, the antenna 900 of Patent Document 1 has a split-ring resonator 910 that uses a split ring 920 that is an annular conductor with a split portion 922. Specifically, the antenna 900 of Patent Document 1 has: a main portion 930 that constitutes the split ring 920; and a power supply portion 940. Here, the power supply portion 940 is provided in the main portion 930. [Prior Art Documents] [Patent Documents] [Patent Document 1] Japanese Patent No. 6020451 Gazette [Problems to be Solved by the Invention] The antenna 900 of Patent Document 1 operates at the resonant frequency of the split-ring resonator 910. That is, the antenna 900 of Patent Document 1 resonates only at a single operating frequency and cannot handle a large frequency bandwidth. Here, the object of the present invention is to provide an antenna having a structure that resonates at a plurality of operating frequencies. [Means for Solving the Problem] The present invention provides a complex resonant antenna. As a first complex resonant antenna, it includes a main antenna and an additional emission element, and is characterized in that: the main antenna includes: a main portion that constitutes a split ring; and a power supply portion that is provided to extend outward from the main portion, and the additional emission element faces the outside of the main antenna and extends directly from the power supply portion. Furthermore, the present invention provides a complex resonant antenna. As a second complex resonant antenna, it is the first complex resonant antenna, wherein the power supply portion includes a first power supply point, a first power supply portion, a second power supply point, and a second power supply portion. The first power supply portion has: a first portion that extends from the main portion in a first predetermined direction; and a second portion that extends from the first portion in a second predetermined direction that intersects the first predetermined direction. The second portion has: a first segment that extends from the first portion; and a second segment that extends from the first segment. In the second predetermined direction, the center of the second portion is located between the first segment and the second segment. In the second predetermined direction, the first power supply point is provided at the end of the second segment. The second power supply portion extends from the main portion to the second power supply point. The additional emission element extends from the second segment. Furthermore, the present invention provides a complex resonant antenna. As a third complex resonant antenna, it is the second complex resonant antenna, wherein the second portion has a straight portion that extends linearly in the second predetermined direction, and the additional emission element has an additional straight portion that extends linearly in the second predetermined direction. The straight portion and the additional straight portion are parallel to each other and form a slot that is open at one end. Furthermore, the present invention provides a complex resonance antenna, as a fourth complex resonance antenna, which is a second complex resonance antenna, and the complex resonance antenna further includes an auxiliary emission element extending outward from the second power supply portion to the outside of the main antenna. [Advantages of the Invention] The complex resonance antenna of the present invention includes an additional emission element outside the main antenna. Thereby, the complex resonance antenna of the present invention can resonate at the operating frequencies of both the operating frequency of the main antenna and the operating frequency of the additional emission element. That is, the complex resonance antenna of the present invention has a structure that resonates at multiple operating frequencies. [Embodiments for Carrying out the Invention] As shown in FIG. 1, the complex resonance antenna 10 of the embodiment of the present invention includes a main antenna 30 and an additional emission element 270. In addition, the complex resonance antenna 10 of the present embodiment does not have a ground conductor around it. As shown in FIG. 1, the main antenna 30 and the additional emission element 270 are located on the same plane orthogonal to the vertical direction. In the present embodiment, the vertical direction is the Z direction. Also, the +Z direction is upward and the -Z direction is downward. In the complex resonance antenna 10, the main antenna 30 and the additional emission element 270 are integrally formed. The combination of the main antenna 30 and the additional emission element 270 is constituted by conductor lines formed on a substrate (not shown). In addition, the present invention is not limited to this. The combination of the main antenna 30 and the additional emission element 270 can also be constituted by metal members mounted on the substrate during use, for example. In addition, when the main antenna 30 and the additional emission element 270 are microfabricated, the one constituted by the conductor lines formed on the substrate is better in terms of mechanical strength, so it is preferably adopted. As shown in FIG. 1, the main antenna 30 includes a main portion 320 and a power supply portion 210. As shown in FIG. 1, the shape of the main portion 320 of the present embodiment is a substantially rectangular annular shape that is longer in the horizontal direction. However, the present invention is not limited to this. The shape of the main portion 320 of the present invention can be not only a substantially rectangular annular shape, but also various annular shapes such as a circular annular shape, an elliptical annular shape, or a polygonal annular shape. In addition, in the present embodiment, the horizontal direction is the X direction. In the present embodiment, sometimes the -X direction is referred to as the first predetermined direction. As shown in FIG. 1, the main part 320 has a first part 330, a second part 332, a third part 334, a fourth part 336, and a fifth part 338. The first part 330 and the second part 332 extend along the transverse direction respectively. The first part 330 and the second part 332 are arranged in a first predetermined direction. The first part 330 and the second part 332 are located at the same position in the front-rear direction. The fourth part 336 extends along the transverse direction. The fourth part 336 is away from either the first part 330 or the second part 332 in the front-rear direction. The fourth part 336 is arranged parallel to the first part 330. The fourth part 336 is arranged parallel to the second part 332. The third part 334 and the fifth part 338 extend in the front-rear direction respectively. The third part 334 and the fifth part 338 are away from each other in the transverse direction. The third part 334 and the fifth part 338 are arranged parallel to each other. In this embodiment, the front-rear direction is the Y direction. The +Y direction is the front, and the -Y direction is the rear. In this embodiment, sometimes the -Y direction is particularly referred to as the second predetermined direction, and sometimes the +Y direction is particularly referred to as the third predetermined direction. As shown in FIG. 1, the first part 330 is located on the first predetermined direction side of the second part 332. The first part 330 is located on the first predetermined direction side of the third part 334. The fourth part 336 is located on the second predetermined direction side of the first part 330. The fourth part 336 is located on the second predetermined direction side of the second part 332. The fifth part 338 is located on the first predetermined direction side of the third part 334. As shown in FIG. 1, the first part 330 and the second part 332 of the main part 320 respectively have a first end 322 and a second end 324. The first end 322 and the second end 324 face away from each other to form a dividing part 326. The dividing part 326 extends linearly in the second predetermined direction. The third part 334 of the main part 320 connects the second part 332 and the fourth part 336. The fifth part 338 of the main part 320 connects the first part 330 and the fourth part 336. In this way, the main part 320 constitutes a dividing ring having a dividing part 326. However, the present invention is not limited to this. As long as the main part 320 constitutes a dividing ring, it may also have other annular shapes such as a circular ring shape or an elliptical ring shape. As shown in FIG. 1, the main antenna 30 further includes an opposing part 350. As shown in FIG. 1, the facing portions 350 include a first facing portion 352 and a second facing portion 354. The first facing portion 352 and the second facing portion 354 extend in the front-rear direction from the first end portion 322 and the second end portion 324, respectively. That is, the first facing portion 352 and the second facing portion 354 extend linearly in the front-rear direction from the first end portion 322 and the second end portion 324, respectively. Also, the first facing portion 352 and the second facing portion 354 extend toward the inside of the main portion 320. The first facing portion 352 and the second facing portion 354 are arranged in parallel with each other at a predetermined distance apart. However, the present invention is not limited thereto. In the present invention, the first facing portion 352 and the second facing portion 354 may be formed as long as they constitute a capacitor having desired characteristics, and their shapes, sizes, etc. are not particularly limited. Referring to FIG. 1, the main portion 320 constitutes the inductance component of the main antenna 30 by its shape. The first end portion 322 and the second end portion 324, together with the first facing portion 352 and the second facing portion 354, constitute the capacitance component of the main antenna 30. With this configuration, the main antenna 30 can operate as an LC resonance circuit (first resonance portion). The LC resonance circuit formed by the main antenna 30 is also referred to as a split ring resonator. In this way, the main antenna 30 constitutes the first resonance portion. As shown in FIG. 1, the power supply unit 210 is provided to extend outward from the main portion 320. The power supply unit 210 is located on the first predetermined direction side (-X side) of the main portion 320. In addition, the present invention is not limited thereto, and the power supply unit 210 may also be arranged on a side other than the -X side of the main portion 320. The power supply unit 210 includes a first power supply point 2421, a first power supply portion 220, a second power supply point 252, and a second power supply portion 250. As shown in FIG. 1, an oscillation source 40 is connected to the first power supply point 2421. Specifically, the core wire (not shown) of a coaxial cable (not shown) is connected to the first power supply point 2421. As shown in FIG. 1, the first power supply portion 220 extends from the main portion 320 to the first power supply point 2421. The first power supply portion 220 includes a first portion 230 and a second portion 240. As shown in FIG. 1, the first portion 230 extends from the main portion 320 in the first predetermined direction. That is, the first portion 230 extends linearly from the main portion 320 in the first predetermined direction. In addition, the present invention is not limited thereto, and the first portion 230 may have any shape as long as it extends from the main portion 320 in the first predetermined direction. The first portion 230 is located at the same position as the first portion 330 in the front-rear direction. The first portion 230 is located on the first predetermined direction side of the first portion 330. As shown in FIG. 1, the second part 240 extends from the first part 230 in a second predetermined direction that intersects the first predetermined direction. That is, the second part 240 extends from the first part 230 in a second predetermined direction that is orthogonal to the first predetermined direction. The second part 240 extends from the end of the first part 230 in the first predetermined direction in the second predetermined direction. In the second predetermined direction, the first power supply point 2421 is provided at the end of the second part 240. The second part 240 has a straight part 2422 that extends linearly in the second predetermined direction. More specifically, the second part 240 is composed only of the straight part 2422 that extends linearly in the second predetermined direction. Additionally, the present invention is not limited to this, and the second part 240 can have any shape as long as it extends from the first part 230 in the second predetermined direction. As shown in FIG. 1, the second part 240 has a first segment 241 and a second segment 242. As shown in FIG. 1, the first segment 241 extends from the first part 230. That is, the first segment 241 extends linearly from the first part 230 in the second predetermined direction. The first segment 241 extends linearly from the end of the first part 230 in the first predetermined direction in the second predetermined direction. As shown in FIG. 1, the second segment 242 extends from the first segment 241. That is, the second segment 242 extends linearly from the first segment 241 in the second predetermined direction. In the second predetermined direction, the center 245 of the second part 240 is located between the first segment 241 and the second segment 242. That is, in the second predetermined direction, the center 245 of the second part 240 is located at the boundary between the first segment 241 and the second segment 242. In the second predetermined direction, the first power supply point 2421 is provided at the end of the second segment 242. As shown in FIG. 1, an oscillation source 40 is connected to the second power supply point 252. Specifically, an outer conductor (not shown) of a coaxial cable is connected to the second power supply point 252. As shown in FIG. 1, the second power supply part 250 extends from the main part 320 to the second power supply point 252. That is, the second power supply part 250 extends linearly from the main part 320 to the second power supply point 252 in the first predetermined direction. The second power supply part 250 is located at the same position as the fourth part 336 in the front-rear direction. The second power supply part 250 is located on the first predetermined direction side of the fourth part 336. As shown in FIG. 1, the additional emission element 270 extends directly from the power supply part 210 toward the outside of the main antenna 30. The additional emission element 270 extends outward from the power supply part 210. The additional emission element 270 extends in the first predetermined direction from the power supply part 210. As shown in FIG. 1, an additional emission element 270 extends from a second section 242 that includes a first power supply point 2421. Thus, the structure of the additional emission element 270 extends from near the first power supply point 2421, so impedance matching becomes easier. As shown in FIG. 1, the additional emission element 270 has an additional straight portion 272 that extends linearly in a second predetermined direction. The straight portion 2422 and the additional straight portion 272 are located at positions away from each other in the lateral direction. The straight portion 2422 and the additional straight portion 272 are parallel to each other and form a slot 260 that is open at one end. Thus, impedance matching of the additional emission element 270 becomes easier. The end of the slot 260 on the third predetermined direction side is open. In addition, the longer the length of the slot 260 in the second predetermined direction, the easier the impedance matching of the additional emission element 270 becomes. Therefore, it is preferable that the length of the slot 260 in the second predetermined direction is longer. As shown in FIG. 1, the additional emission element 270 has a base portion 271 and a first extension portion 274. The base portion 271 extends from the second section 242 in a first predetermined direction. That is, the base portion 271 extends linearly from the second section 242 in the first predetermined direction. The base portion 271 and the first extension portion 274 are connected by an additional straight portion 272. The additional straight portion 272 extends from the base portion 271 in a third predetermined direction. The first extension portion 274 extends from the additional straight portion 272 in the first predetermined direction. That is, the first extension portion 274 extends linearly from the additional straight portion 272 in the first predetermined direction. The first extension portion 274 is a rectangle that is longer in the lateral direction. In addition, the present invention is not limited to this, and the shape of the first extension portion 274 is not limited to a rectangle, and it may also have a wider portion at its tip. The additional emission element 270 of the present embodiment has a base portion 271, an additional straight portion 272, and a first extension portion 274. However, the present invention is not limited to this. The additional emission element 270 may not have the base portion 271 and the additional straight portion 272, and may be composed only of the first extension portion 274 that extends directly from the second section 242. The length, shape, etc. of the additional emission element 270 are determined to be electrically resonant at a desired operating frequency. The desired operating frequency is a frequency different from the operating frequency of the main antenna 30. As can be understood from FIG. 1: In the complex resonance antenna 10, the main antenna 30 is powered from the first power supply point 2421 and the second power supply point 252. The additional emission element 270 is connected to the power supply unit 210. With this configuration, the main antenna 30 operates as a split ring resonator (LC resonance circuit or first resonance unit), and the additional emission element 270 operates as a second resonance unit different from the first resonance unit. The first resonance unit and the second resonance unit have different resonance frequencies. In this way, the complex resonance antenna 10 of the present embodiment has a structure that electrically resonates at two operating frequencies, namely, the operating frequency of the main antenna (first resonance unit) 30 and the operating frequency of the additional emission element (second resonance unit) 270. So far, the embodiments of the present invention have been described, but the present embodiment can also be modified as follows. (Modification Example 1) As shown in FIG. 2, the complex resonance antenna 10A of the first modification example includes a main antenna 30A and an additional emission element 270A. In addition, the complex resonance antenna 10A of this modification example does not have a ground conductor provided around it. As shown in FIG. 2, the main antenna 30A and the additional emission element 270A are located on the same plane orthogonal to the vertical direction. In the complex resonance antenna 10A, the main antenna 30A and the additional emission element 270A are integrally formed. The combination of the main antenna 30A and the additional emission element 270A is constituted by conductor lines formed on a substrate (not shown). In addition, the present invention is not limited to this, and the combination of the main antenna 30A and the additional emission element 270A can also be constituted by, for example, metal members mounted on the substrate during use. As shown in FIG. 2, the main antenna 30A includes a main portion 320, an opposing portion 350, and a power supply unit 210A. Here, regarding the main portion 320 and the opposing portion 350, they are the same as the main portion 320 and the opposing portion 350 of the complex resonance antenna 10 of the above embodiment, so the detailed description thereof is omitted. As shown in FIG. 2, the power supply unit 210A is provided to extend outward from the main portion 320. The power supply unit 210A is located on the first predetermined direction side (-X side) of the main portion 320. In addition, the present invention is not limited to this, and the power supply unit 210A can also be arranged on a side other than the -X side of the main portion 320. The power supply unit 210A includes a first power supply point 2421, a first power supply portion 220A, a second power supply point 252, and a second power supply portion 250A. Here, regarding the first power supply point 2421 and the second power supply point 252, they are the same as the first power supply point 2421 and the second power supply point 252 of the complex resonance antenna 10 of the above embodiment, and the detailed description thereof is omitted. As shown in FIG. 2, the first power supply part 220A extends from the main part 320 to the first power supply point 2421. The first power supply part 220A has a first part 230 and a second part 240A. Here, regarding the first part 230, it is the same as the first part 230 of the complex resonance antenna 10 in the above embodiment, so its detailed description is omitted. As shown in FIG. 2, the second part 240A extends from the first part 230 in a second predetermined direction that intersects the first predetermined direction. That is, the second part 240A extends from the first part 230 in a second predetermined direction that is orthogonal to the first predetermined direction. The second part 240A extends from the end of the first part 230 in the first predetermined direction in the second predetermined direction. In the second predetermined direction, the first power supply point 2421 is provided at the end of the second part 240A. The second part 240A has a straight part 2422 that extends linearly in the second predetermined direction, and an extension part 244. The extension part 244 extends from the straight part 2422 in the first predetermined direction. That is, the extension part 244 extends linearly from the straight part 2422 in the first predetermined direction. As shown in FIG. 2, the second part 240A has a first stage 241 and a second stage 242A. Here, regarding the first stage 241, it is the same as the first stage 241 of the complex resonance antenna 10 in the above embodiment, so its detailed description is omitted. As shown in FIG. 2, the second stage 242A extends from the first stage 241. More specifically, the second stage 242A extends linearly from the first stage 241 in the second predetermined direction and then bends to extend linearly in the first predetermined direction. In the second predetermined direction, the center 245A of the second part 240A is located between the first stage 241 and the second stage 242A. That is, in the second predetermined direction, the center 245A of the second part 240A is located at the boundary between the first stage 241 and the second stage 242A. In the second predetermined direction, the first power supply point 2421 is provided at the end of the second stage 242A. As shown in FIG. 2, the second power supply part 250A extends from the main part 320 to the second power supply point 252. That is, the second power supply part 250A extends linearly from the main part 320 to the second power supply point 252 in the first predetermined direction. The second power supply part 250A is located at the same position as the fourth part 336 in the front-rear direction. The second power supply part 250A is located on the first predetermined direction side of the fourth part 336. As shown in FIG. 2, the additional emission element 270A extends directly from the power supply part 210A toward the outside of the main antenna 30A. The additional emission element 270A extends from the power supply part 210A to the outside. The additional emission element 270A extends from the power supply part 210A in the first predetermined direction. As shown in FIG. 2, an additional emission element 270A extends from a second section 242A that includes a first power supply point 2421. Thereby, the structure of the additional emission element 270A extends from near the first power supply point 2421, so impedance matching becomes easier to perform. As shown in FIG. 2, the additional emission element 270A has an additional straight portion 272A that linearly extends in a second predetermined direction. The additional straight portion 272A extends from the second section 242A in a third predetermined direction. The straight portion 2422 and the additional straight portion 272A are located at positions away from each other in the lateral direction. The straight portion 2422 and the additional straight portion 272A are parallel to each other and form a slot 260A with one end open. Thereby, impedance matching of the additional emission element 270A becomes easier to perform. The slot 260A is open at the end on the third predetermined direction side. As shown in FIG. 2, the additional emission element 270A has a first extension portion 274. That is, the additional emission element 270A is different from the additional emission element 270 in the above-described embodiment and does not have a base portion 271. Here, the first extension portion 274 is the same as the first extension portion 274 of the complex resonance antenna 10 in the above-described embodiment, so its detailed description is omitted. The additional emission element 270A of this modification has an additional straight portion 272A and a first extension portion 274, but the present invention is not limited thereto. The additional emission element 270A may also not have the additional straight portion 272A and may be constituted only by the first extension portion 274 that directly extends from the second section 242A. The length, shape, etc. of the additional emission element 270A are determined to be electrically resonant at a desired operating frequency. The desired operating frequency is a frequency different from the operating frequency of the main antenna 30A. It can be understood from FIG. 2 that the complex resonance antenna 10A of this modification also has a structure that is electrically resonant at two operating frequencies, such as the operating frequency of the main antenna (first resonance portion) 30A and the operating frequency of the additional emission element (second resonance portion) 270A. (Modification 2) As shown in FIG. 3, the complex resonance antenna 10B of the second modification includes a main antenna 30B and an additional emission element 270B. In addition, the complex resonance antenna 10B of this modification does not have a ground conductor around it. As shown in FIG. 3, the main antenna 30B and the additional emission element 270B are located on the same plane orthogonal to the vertical direction. In the complex resonance antenna 10B, the main antenna 30B and the additional emission element 270B are integrally formed. The combination of the main antenna 30B and the additional emission element 270B is constituted by conductor lines formed on a substrate (not shown). In addition, the present invention is not limited thereto, and the combination of the main antenna 30B and the additional emission element 270B may also be constituted by, for example, metal members mounted on the substrate during use. As shown in FIG. 3, the main antenna 30B includes a main portion 320, an opposing portion 350, and a power supply portion 210B. Here, regarding the main portion 320 and the opposing portion 350, they are the same as the main portion 320 and the opposing portion 350 of the complex resonance antenna 10 in the above-described embodiment, and thus, detailed descriptions thereof are omitted. As shown in FIG. 3, the power supply portion 210B is provided to extend outward from the main portion 320. The power supply portion 210B is located on the first predetermined direction side (-X side) of the main portion 320. In addition, the present invention is not limited thereto, and the power supply portion 210B may also be disposed other than the -X side of the main portion 320. The power supply portion 210B includes a first power supply point 2421B, a first power supply portion 220B, a second power supply point 252B, and a second power supply portion 250B. As shown in FIG. 3, an oscillation source 40 is connected to the first power supply point 2421B. Specifically, the core wire (not shown) of a coaxial cable (not shown) is connected to the first power supply point 2421B. As shown in FIG. 3, the first power supply portion 220B extends from the main portion 320 to the first power supply point 2421B. The first power supply portion 220B has a first portion 230 and a second portion 240B. Here, regarding the first portion 230, it is the same as the first portion 230 of the complex resonance antenna 10 in the above-described embodiment, and thus, detailed descriptions thereof are omitted. As shown in FIG. 3, the second portion 240B extends from the first portion 230 in a second predetermined direction intersecting the first predetermined direction. That is, the second portion 240B extends from the first portion 230 in a second predetermined direction orthogonal to the first predetermined direction. The second portion 240B extends from an end portion of the first portion 230 in the first predetermined direction in the second predetermined direction. The second portion 240B has a straight portion 2422B that linearly extends in the second predetermined direction. More specifically, the second portion 240B is constituted only by the straight portion 2422B that linearly extends in the second predetermined direction. In addition, compared with the second portion 240 of the above-described embodiment, the length of the second portion 240B in the second predetermined direction becomes shorter in this modification. In the second predetermined direction, the first power supply point 2421B is provided at an end portion of the second portion 240B. As shown in FIG. 3, the second part 240B has a first section 241 and a second section 242B. Here, regarding the first section 241, it is the same as the first section 241 of the complex resonance antenna 10 in the above-described embodiment, so its detailed description is omitted. As shown in FIG. 3, the second section 242B extends from the first section 241. That is, the second section 242B extends linearly from the first section 241 in the second predetermined direction. In the second predetermined direction, the center 245B of the second part 240B is located between the first section 241 and the second section 242B. That is, in the second predetermined direction, the center 245B of the second part 240B is located at the boundary between the first section 241 and the second section 242B. In the second predetermined direction, the first power supply point 2421B is provided at the end of the second section 242B. As shown in FIG. 3, an oscillation source 40 is connected to the second power supply point 252B. Specifically, an outer conductor (not shown) of a coaxial cable is connected to the second power supply point 252B. As shown in FIG. 3, the second power supply part 250B extends from the main part 320 to the second power supply point 252B. More specifically, the second power supply part 250B extends linearly from the main part 320 in the first predetermined direction and then bends to extend to the second power supply point 252B in the third predetermined direction. The second power supply part 250B is located on the first predetermined direction side of the fourth part 336. As shown in FIG. 3, the additional emission element 270B extends directly from the power supply part 210B toward the outside of the main antenna 30B. The additional emission element 270B extends outward from the power supply part 210B. The additional emission element 270B extends in the first predetermined direction from the power supply part 210B. As shown in FIG. 3, the additional emission element 270B extends from the second section 242B including the first power supply point 2421B. Thereby, the structure of the additional emission element 270B is such that it extends from near the first power supply point 2421B, so impedance matching becomes easier to perform. As shown in FIG. 3, the additional emission element 270B has an additional linear part 272B that extends linearly in the second predetermined direction. The linear part 2422B and the additional linear part 272B are located at positions away from each other in the lateral direction. The linear part 2422B and the additional linear part 272B are parallel to each other and form a slot 260B with one end open. Thereby, impedance matching of the additional emission element 270B becomes easier to perform. The slot 260B is open at the end on the third predetermined direction side. As shown in FIG. 3, the additional emission element 270B has a base 271B and a first extension 274. Here, regarding the first extension 274, it is the same as the first extension 274 of the complex resonance antenna 10 in the above-described embodiment, and thus, its detailed description is omitted. The base 271B extends from the second stage 242B in a first predetermined direction. That is, the base 271B extends linearly from the second stage 242B in the first predetermined direction. The base 271B and the first extension 274 are connected by an additional straight portion 272B. The additional straight portion 272B extends from the base 271B in a third predetermined direction. The additional emission element 270B of the present embodiment has a base 271B, an additional straight portion 272B, and a first extension 274. However, the present invention is not limited thereto. The additional emission element 270B may also be configured only by the first extension 274 that directly extends from the second stage 242B without having the base 271B and the additional straight portion 272B. The length, shape, etc. of the additional emission element 270B are determined to be electrically resonant at a desired operating frequency. The desired operating frequency is a frequency different from the operating frequency of the main antenna 30B. As can be understood from FIG. 3, the complex resonance antenna 10B of this modification also has a structure that is electrically resonant at two operating frequencies, namely, the operating frequency of the main antenna (first resonance portion) 30B and the operating frequency of the additional emission element (second resonance portion) 270B. (Modification 3) As shown in FIG. 4, the complex resonance antenna 10C of the third modification includes a main antenna 30, an additional emission element 270, and an auxiliary emission element 280. Here, regarding the main antenna 30 and the additional emission element 270, they are the same as the main antenna 30 and the additional emission element 270 of the complex resonance antenna 10 in the above-described embodiment, and thus, their detailed description is omitted. In addition, the complex resonance antenna 10C of this modification does not have a ground conductor provided around it. As shown in FIG. 4, the main antenna 30, the additional emission element 270, and the auxiliary emission element 280 are located on the same plane orthogonal to the vertical direction. In the complex resonance antenna 10C, the main antenna 30, the additional emission element 270, and the auxiliary emission element 280 are integrally formed. The combination of the main antenna 30, the additional emission element 270, and the auxiliary emission element 280 is constituted by conductor lines formed on a substrate (not shown). In addition, the present invention is not limited thereto. The combination of the main antenna 30, the additional emission element 270, and the auxiliary emission element 280 may also be constituted by, for example, metal members mounted on the substrate during use. As shown in FIG. 4, the auxiliary emission element 280 extends from the second power supply part 250 toward the outside of the main antenna 30. More specifically, the auxiliary emission element 280 extends linearly from the second power supply part 250 toward the outside of the main antenna 30 and then bends to extend in a third predetermined direction. The auxiliary emission element 280 extends from the second power supply part 250 in a first predetermined direction. The auxiliary emission element 280 has a first straight part 282 and a second straight part 284. As shown in FIG. 4, the first straight part 282 extends linearly from the second power supply part 250 in a first predetermined direction. The first straight part 282 is located on the second predetermined direction side of the additional emission element 270. That is, the additional emission element 270 is located on the third predetermined direction side of the first straight part 282. As shown in FIG. 4, the second straight part 284 extends linearly from the first straight part 282 in a third predetermined direction. The second straight part 284 is located on the first predetermined direction side of the additional emission element 270. In addition, the second straight part 284 is not connected to the additional emission element 270. The length, shape, etc. of the auxiliary emission element 280 are determined to be electrically resonant at a desired operating frequency. The desired operating frequency is a frequency different from the operating frequencies of the main antenna 30 and the additional emission element 270. It can be understood from FIG. 4 that the auxiliary emission element 280 operates as a third resonance part different from the first resonance part and the second resonance part. The first resonance part, the second resonance part, and the third resonance part have different resonance frequencies. In this way, the multi-resonance antenna 10C of this modification has a structure that is electrically resonant at three operating frequencies, namely, the operating frequency of the main antenna (first resonance part) 30, the operating frequency of the additional emission element (second resonance part) 270, and the operating frequency of the auxiliary emission element 280 (third resonance part). (Modification 4) As shown in FIG. 5, the multi-resonance antenna 10D of the fourth modification includes a main antenna 30, an additional emission element 270, and an auxiliary emission element 280D. Here, regarding the main antenna 30 and the additional emission element 270, they are the same as the main antenna 30 and the additional emission element 270 of the multi-resonance antenna 10 of the above-described embodiment, so their detailed description is omitted. In addition, the multi-resonance antenna 10D of this modification does not have a ground conductor provided around it. As shown in FIG. 5, the main antenna 30, the additional emission element 270, and the auxiliary emission element 280D are located on the same plane orthogonal to the vertical direction. In the complex resonance antenna 10D, the main antenna 30, the additional emission element 270, and the auxiliary emission element 280D are integrally formed. The combination of the main antenna 30, the additional emission element 270, and the auxiliary emission element 280D is constituted by conductor lines formed on a substrate (not shown). Additionally, the present invention is not limited to this, and the combination of the main antenna 30, the additional emission element 270, and the auxiliary emission element 280D can also be constituted by, for example, metal members mounted on the substrate during use. As shown in FIG. 5, the auxiliary emission element 280D extends from the second power supply portion 250 toward the outside of the main antenna 30. The auxiliary emission element 280D has a first straight portion 282, a wider portion 283, and a second straight portion 284. Here, regarding the first straight portion 282 and the second straight portion 284, they are the same as the first straight portion 282 and the second straight portion 284 of the auxiliary emission element 280C of the complex resonance antenna 10C of the third modification example, so their detailed description is omitted. As shown in FIG. 5, the wider portion 283 extends from the first straight portion 282 in a third predetermined direction. The wider portion 283 is located on the second predetermined direction side of the additional emission element 270. Additionally, the wider portion 283 is not connected to the additional emission element 270. The length, shape, etc. of the auxiliary emission element 280D are determined to be electrically resonant at a desired operating frequency. The desired operating frequency is a frequency different from the operating frequencies of the main antenna 30 and the additional emission element 270. It can be understood from FIG. 5 that the auxiliary emission element 280D operates as a third resonance portion different from the first resonance portion and the second resonance portion. The first resonance portion, the second resonance portion, and the third resonance portion have different resonance frequencies from each other. Thus, the complex resonance antenna 10D of this modification example has a structure that is electrically resonant at three operating frequencies, namely, the operating frequency of the main antenna (first resonance portion) 30, the operating frequency of the additional emission element (second resonance portion) 270, and the operating frequency of the auxiliary emission element 280D (third resonance portion). (Modification Example 5) As shown in FIG. 6, the complex resonance antenna 10E of the fifth modification example includes a main antenna 30, an additional emission element 270, and an auxiliary emission element 280E. Here, regarding the main antenna 30 and the additional emission element 270, they are the same as the main antenna 30 and the additional emission element 270 of the complex resonance antenna 10 of the above-described embodiment, so their detailed description is omitted. Additionally, the complex resonance antenna 10E of this modification example does not have a ground conductor provided around it. As shown in FIG. 6, the main antenna 30, the additional emission element 270, and the auxiliary emission element 280E are located on the same plane orthogonal to the vertical direction. In the complex resonance antenna 10E, the main antenna 30, the additional emission element 270, and the auxiliary emission element 280E are integrally formed. The combination of the main antenna 30, the additional emission element 270, and the auxiliary emission element 280E is constituted by conductor lines formed on a substrate (not shown). Additionally, the present invention is not limited thereto, and the combination of the main antenna 30, the additional emission element 270, and the auxiliary emission element 280E can also be constituted by, for example, metal members mounted on the substrate during use. As shown in FIG. 6, the auxiliary emission element 280E extends from the second power supply portion 250 toward the outside of the main antenna 30. The auxiliary emission element 280E has a first straight portion 282, a wider portion 283, a second straight portion 284, a crank portion 286, and an additional wider portion 287. Here, regarding the first straight portion 282, the wider portion 283, and the second straight portion 284, they are the same as the first straight portion 282, the wider portion 283, and the second straight portion 284 of the auxiliary emission element 280D of the complex resonance antenna 10D of the fourth modification example, so their detailed description is omitted. As shown in FIG. 6, the crank portion 286 extends from the second straight portion 284 in a first predetermined direction. More specifically, the crank portion 286 extends linearly from the second straight portion 284 in the first predetermined direction, then bends to extend linearly in a second predetermined direction, and further bends to extend linearly in the first predetermined direction. As shown in FIG. 6, the additional wider portion 287 extends from the crank portion 286 in a third predetermined direction. The length, shape, etc. of the auxiliary emission element 280E are determined to resonate electrically at a desired operating frequency. The desired operating frequency is a frequency different from the operating frequencies of the main antenna 30 and the additional emission element 270. It can be understood from FIG. 6 that the auxiliary emission element 280E operates as a third resonance portion different from the first resonance portion and the second resonance portion. The first resonance portion, the second resonance portion, and the third resonance portion have different resonance frequencies from each other. In this way, the complex resonance antenna 10E of this modification example has a structure that resonates electrically at three operating frequencies, namely, the operating frequency of the main antenna (first resonance portion) 30, the operating frequency of the additional emission element (second resonance portion) 270, and the operating frequency of the auxiliary emission element 280E (third resonance portion). (Modification Example 6) As shown in FIG. 7, the complex resonance antenna 10F of the sixth modification example includes a main antenna 30F, an additional emission element 270, and an auxiliary emission element 280E. Here, regarding the additional emission element 270 and the auxiliary emission element 280E, they are the same as the additional emission element 270 and the auxiliary emission element 280E of the complex resonance antenna 10E of the fifth modification example, so their detailed description is omitted. In addition, for the complex resonance antenna 10F of this modification example, no ground conductor is provided around it. As shown in FIG. 7, the main antenna 30F, the additional emission element 270, and the auxiliary emission element 280E are located on the same plane orthogonal to the up-down direction. In the complex resonance antenna 10F, the main antenna 30F, the additional emission element 270, and the auxiliary emission element 280E are integrally formed. The combination of the main antenna 30F, the additional emission element 270, and the auxiliary emission element 280E is constituted by conductor lines formed on a substrate (not shown). In addition, the present invention is not limited to this, and the combination of the main antenna 30F, the additional emission element 270, and the auxiliary emission element 280E can also be constituted by, for example, metal members mounted on the substrate during use. As shown in FIG. 7, the main antenna 30F includes a main portion 320 and a power supply portion 210. Here, regarding the main portion 320 and the power supply portion 210, they are the same as the main portion 320 and the power supply portion 210 of the complex resonance antenna 10 in the above-described embodiment, so their detailed description is omitted. As shown in FIG. 7, the main antenna 30F further includes a facing portion 350F. As shown in FIG. 7, the facing portion 350F has a first facing portion 352F and a second facing portion 354F. The first facing portion 352F and the second facing portion 354F respectively extend in the front-rear direction from the first end portion 322 and the second end portion 324. The first facing portion 352F and the second facing portion 354F extend toward the inside of the main portion 320. The first facing portion 352F and the second facing portion 354F are respectively in a comb shape. A finger slot 360 is formed between the first facing portion 352F and the second facing portion 354F. Referring to FIG. 7, the main portion 320 constitutes the inductance component of the main antenna 30F by its shape. The first end portion 322 and the second end portion 324, together with the first facing portion 352F and the second facing portion 354F, constitute the capacitance component of the main antenna 30F. With this configuration, the main antenna 30F can operate as an LC resonance circuit (first resonance portion). The LC resonance circuit formed by the main antenna 30F is also called a split ring resonator. In this way, the main antenna 30F constitutes the first resonance portion. As can be understood from FIG. 7, the complex resonance antenna 10F of this modification has an electrical resonance structure with three operating frequencies, namely, the operating frequency of the main antenna (first resonance section) 30F, the operating frequency of the additional emission element (second resonance section) 270, and the operating frequency of the auxiliary emission element 280E (third resonance section). As described above, embodiments of the present invention have been specifically described by way of examples. However, the present invention is not limited thereto and can be variously modified. The complex resonance antennas 10, 10A, 10B, 10C, 10D, 10E, 10F of the present embodiment and the modifications do not have a ground conductor provided around them. However, the present invention is not limited thereto, and a ground conductor may also be provided on the +X side or the second predetermined direction side (-Y side) of the main antennas 30, 30A, 30B, 30F, and on the second predetermined direction side (-Y side) of the auxiliary emission elements 280, 280D, 280E. In the complex resonance antennas 10, 10A, 10B, 10C, 10D, 10E of the present embodiment and the modifications, the first facing portion 352 and the second facing portion 354 linearly extend in the front-rear direction from the first end portion 322 and the second end portion 324, respectively, and the dividing portion 326 linearly extends in the second predetermined direction. However, the present invention is not limited thereto. Specifically, the complex resonance antennas 10, 10A, 10B, 10C, 10D, 10E may also be modified such that, like the first facing portion 352F and the second facing portion 354F of the complex resonance antenna 10F of the sixth modification, the first facing portion 352 and the second facing portion 354 are respectively in a comb shape, and a finger slot is formed between the first facing portion 352 and the second facing portion 354. The complex resonance antennas 10C, 10D, 10E, 10F of this modification include the auxiliary emission elements 280, 280D, 280E. However, the present invention is not limited thereto, and the auxiliary emission elements 280, 280D, 280E may also not be included. 10, 10A, 10B, 10C, 10D, 10E, 10F: Complex resonance antenna 30, 30A, 30B, 30F: Main antenna 40: Oscillation source 210, 210A, 210B: Power supply unit 220, 220A, 220B: First power supply part 230: First part 240, 240A, 240B: Second part 241: First stage 242, 242A, 242B: Second stage 2421, 2421B: First power supply point 2422, 2422B: Straight part 244: Extension part 245, 245A, 245B: Center 250, 250A, 250B: Second power supply part 252, 252B: Second power supply point 260, 260A, 260B: Slot 270, 270A, 270B: Additional emission element 271, 271B: Base 272, 272A, 272B: Additional straight part 274: First extension part 280, 280D, 280E: Auxiliary emission element 282: First straight part 283: Wider part 284: Second straight part 286: Crank part 287: Additional wider part 320: Main part (split ring) 322: First end 324: Second end 326: Split part 330: First part 332: Second part 334: Third part 336: Fourth part 338: Fifth part 350, 350F: Opposing part 352, 352F: First opposing part 354, 354F: Second opposing part 360: Interdigital slot Figure 1 is a top view showing a complex resonance antenna according to an embodiment of the present invention. Figure 2 is a top view showing a first modification of the complex resonance antenna of Figure 1. Figure 3 is a top view showing a second modification of the complex resonance antenna of Figure 1. Figure 4 is a top view showing a third modification of the complex resonance antenna of Figure 1. Figure 5 is a top view showing a fourth modification of the complex resonance antenna of Figure 1. Figure 6 is a top view showing a fifth modification of the complex resonance antenna of Figure 1. Figure 7 is a top view showing a sixth modification of the complex resonance antenna of Figure 1. Figure 8 is a top view showing the antenna described in Patent Document 1. 10: Complex resonance antenna 30: Main antenna 40: Oscillation source 210: Power supply unit 220: First power supply part 230: First part 240: Second part 241: First stage 242: Second stage 245: Center 250: Second power supply part 252: Second power supply point 260: Slot 270: Additional emission element 271: Base 272: Additional straight portion 274: First extension 320: Main portion (split ring) 322: First end 324: Second end 326: Split portion 330: First part 332: Second part 334: Third part 336: Fourth part 338: Fifth part 350: Opposing portion 352: First opposing portion 354: Second opposing portion 2421: First power supply point 2422: Straight portion

Claims

1. A complex resonant antenna, comprising a main antenna and an additional transmitting element, characterized in that: the main antenna system comprises: The main part forms a segmented ring; The system includes a power supply section extending outward from the main part, and an additional transmitting element extending directly from the power supply section outward from the main antenna. The power supply section includes a first power supply point, a first power supply portion, a second power supply point, and a second power supply portion. The first power supply portion has a first portion extending from the main part in a first predetermined direction, and a second portion extending from the first portion in a second predetermined direction intersecting the first predetermined direction. The second portion has a first segment extending from the first portion, and a second segment extending from the first segment. In the second predetermined direction, the center of the second portion is located between the first segment and the second segment. In the second predetermined direction, the first power supply point is located at the end of the second segment. The second power supply portion extends from the main part to the second power supply point. The additional transmitting element extends from the second segment.

2. The complex resonant antenna of claim 1, wherein the second portion has a straight portion extending linearly in the second predetermined direction, the additional transmitting element has an additional straight portion extending linearly in the second predetermined direction, the straight portion and the additional straight portion being parallel to each other and forming a slot with one end open.

3. The complex resonant antenna of claim 1, wherein the complex resonant antenna further includes an auxiliary transmitting element extending from the second power supply section outward from the main antenna.

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