Antenna member and assembly

Abstract

To provide an antenna member that can be made more small-sized.SOLUTION: An antenna member 100 is mounted on a substrate and used as an antenna. The antenna member 100 has a split ring resonance part 200, an impedance matching part 300, and a power feed part 500. The split ring resonance part 200 is provided with an opposite part 220 constituting a split 210. The split ring resonance part 200 has a first side part 230, a second side part 240, and an upper part 260. The second side part 240 is located apart from the first side part 230 in a lateral direction. The power feed part 500 is provided at at least one of the first side part 230 and second side part 240. The impedance matching part 300 is located above the power feed part 500 in a longitudinal direction orthogonal to the lateral direction, and couples the first side part 230 and second side part 240 to each other.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to an antenna member mounted on a substrate. [Background technology]

[0002] Referring to FIG. 25, Patent Document 1 discloses an antenna member 900 that is mounted on a substrate (not shown) and used as an antenna. The antenna member 900 has a split ring resonator 910, an impedance matching section 920, and a power feed section 930. The split ring resonator 910 is provided with an opposing section 912 that constitutes a split 911. The split ring resonator 910 has a first side section 914, a second side section 916, and an upper section 918. The second side section 916 is located away from the first side section 914 in the Y direction. The upper section 918 connects the first side section 914 and the second side section 916 to each other.

[0003] There is a demand for further miniaturization of antenna members such as the antenna member 900 of Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6240040 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an antenna member that can be further miniaturized. [Means for solving the problem]

[0006] The present invention provides a first antenna member, An antenna member mounted on a substrate and used as an antenna, The antenna member has a split ring resonator, an impedance matching section, and a power supply section, The split ring resonator is provided with opposing portions that form a split, the split ring resonator has a first side, a second side, and a top side; the second side is laterally spaced from the first side, the upper portion connects the first side portion and the second side portion to each other; the power supply unit is provided on at least one of the first side portion and the second side portion, The impedance matching portion is located above the power supply portion in a vertical direction perpendicular to the horizontal direction, and connects the first side portion and the second side portion to each other. An antenna member is provided.

[0007] The present invention provides a first antenna member as a second antenna member, The impedance matching portion is located lower than the facing portion in the up-down direction. An antenna member is provided.

[0008] The present invention provides a third antenna member, which is the first or second antenna member, The split ring resonator further includes a lower portion, the lower side portion extends from the second side portion toward the first side portion, The lower portion is located away from the impedance matching portion in the up-down direction and is located below the impedance matching portion. An antenna member is provided.

[0009] The present invention provides a fourth antenna member, of An antenna member, The power supply unit includes a first power supply unit and a second power supply unit, the first power supply portion is provided at a lower end of the first side portion in the up-down direction, The second power supply portion is provided at an end portion of the lower portion. An antenna member is provided.

[0010] The present invention provides, as a fifth antenna member, an assembly in which any one of the first to fourth antenna members is mounted on the substrate. Effect of the Invention

[0011] The impedance matching portion of the antenna member of the present invention is located above the power supply portion in the vertical direction perpendicular to the horizontal direction, and connects the first side portion and the second side portion to each other. This allows the antenna member of the present invention to be further miniaturized. In addition, when the antenna member of the present invention is made of sheet metal, it is more effective because a blank can be cut out from the metal plate without waste. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a front perspective view showing an assembly according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a rear perspective view showing the assembly of FIG. 1. [Diagram 3] FIG. 2 is a top view showing the assembly of FIG. 1. [Figure 4] FIG. 2 is a front view showing the assembly of FIG. [Diagram 5] FIG. 2 is a rear view showing the assembly of FIG. [Figure 6] FIG. 2 is a side view showing the assembly of FIG. [Figure 7] 2 is a top perspective view showing an antenna member included in the assembly of FIG. 1. [Figure 8] FIG. 8 is a bottom perspective view showing the antenna member of FIG. 7. [Figure 9] FIG. 8 is a front view showing the antenna member of FIG. [Figure 10] FIG. 8 is a top view showing the antenna member of FIG. [Figure 11] 8 is a bottom view showing the antenna member of FIG. 7. [Figure 12]FIG. 8 is a side view showing the antenna member of FIG. [Figure 13] FIG. 11 is a front perspective view showing an assembly according to a second embodiment of the present invention. [Figure 14] FIG. 14 is a rear perspective view of the assembly of FIG. 13. [Figure 15] FIG. 14 is a top view of the assembly of FIG. 13. [Figure 16] FIG. 14 is a front view showing the assembly of FIG. 13. [Figure 17] FIG. 14 is a rear view of the assembly of FIG. 13. [Figure 18] FIG. 14 is a side view of the assembly of FIG. 13. [Figure 19] 14 is a top perspective view showing an antenna member included in the assembly of FIG. 13. [Figure 20] 20 is a bottom perspective view showing the antenna member of FIG. 19. [Figure 21] FIG. 20 is a front view showing the antenna member of FIG. 19. [Figure 22] FIG. 20 is a top view showing the antenna member of FIG. 19. [Figure 23] 20 is a bottom view showing the antenna member of FIG. 19. [Figure 24] FIG. 20 is a side view showing the antenna member of FIG. 19. [Diagram 25] FIG. 1 is a front view showing the antenna member of Patent Document 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (First embodiment) 1, an assembly 700 according to the first embodiment of the present invention is formed by mounting an antenna member 100 on a substrate 600. Here, the substrate 600 has a feed pattern (not shown) and a ground pattern (not shown).

[0014] 1, an antenna member 100 of this embodiment is mounted on a substrate 600 and used as an antenna. The antenna member 100 is made of metal. More specifically, the antenna member 100 is produced by punching a blank from a metal plate and bending the blank thus punched.

[0015] As shown in FIG. 8, the antenna member 100 of this embodiment has a split ring resonating section 200, an impedance matching section 300, and a power feeding section 500. The split ring resonating section 200 has a first end portion 202 and a second end portion 202a.

[0016] As shown in Fig. 9, the split ring resonator 200 of this embodiment has a substantially rectangular shape in a plane perpendicular to the front-rear direction. In this embodiment, the front-rear direction is the X direction. Here, the front is the +X direction, and the rear is the -X direction. The split ring resonator 200 has a first side portion 230, a second side portion 240, an upper side portion 260, and a lower side portion 400.

[0017] As shown in FIG. 9, the first side portion 230 of this embodiment extends in the vertical direction. In this embodiment, the vertical direction is the Z direction. Here, the upper side is the +Z direction, and the lower side is the -Z direction. The first side portion 230 defines the left end of the split ring resonator 200 in the horizontal direction. In this embodiment, the horizontal direction is the Y direction. Moreover, the right side is the +Y direction, and the left side is the -Y direction. The first side portion 230 is located to the left, away from the second side portion 240 in the horizontal direction.

[0018] As shown in Fig. 9, the second side portion 240 of the present embodiment extends in the up-down direction. The second side portion 240 defines the right end of the split-ring resonating unit 200 in the lateral direction. The second side portion 240 is located away from the first side portion 230 in the lateral direction. That is, the second side portion 240 is located to the right and away from the first side portion 230 in the lateral direction. As shown in Fig. 8, the second side portion 240 has a fixing portion 242.

[0019] 2 and 8, the fixing portion 242 of the present embodiment is fixed to the substrate 600 when the antenna member 100 is mounted on the substrate 600. The fixing portion 242 defines the lower end of the antenna member 100 in the up-down direction. The fixing portion 242 extends downward from the lower end of the second side portion 240.

[0020] As shown in FIG. 9, the upper portion 260 of this embodiment defines the upper end of the split ring resonator 200 in the up-down direction. The upper portion 260 extends in the horizontal direction. The upper portion 260 connects the first side portion 230 and the second side portion 240 to each other. More specifically, the upper portion 260 connects the upper end of the first side portion 230 to the upper end of the second side portion 240 to each other. The upper portion 260 electromagnetically connects the first side portion 230 to the second side portion 240 to each other. The upper portion 260 has an opposing portion 220 and an upper frame portion 262.

[0021] As shown in Fig. 8, the facing portion 220 in this embodiment constitutes the split 210. That is, the split ring resonator 200 is provided with the facing portion 220 constituting the split 210. The facing portion 220 constitutes a capacitance component of the antenna member 100. The facing portion 220 has a front facing portion 222 and a rear facing portion 224. The front facing portion 222 and the rear facing portion 224 face each other with a space therebetween in the front-rear direction. The front facing portion 222 is located in front of the rear facing portion 224 in the front-rear direction. The split 210 is located between the front facing portion 222 and the rear facing portion 224 in the front-rear direction.

[0022] 9, the upper frame portion 262 of the present embodiment has a right portion 2622 and a left portion 2624. The right portion 2622 extends from the front facing portion 222 to the right in the horizontal direction. The right portion 2622 connects the front facing portion 222 and the second side portion 240. As shown in FIG. 8, the left portion 2624 extends from the rear facing portion 224 to the left in the horizontal direction. The left portion 2624 connects the rear facing portion 224 and the first side portion 230.

[0023] 8, the lower portion 400 in this embodiment extends from the second side portion 240 toward the first side portion 230. The lower portion 400 is located between the first side portion 230 and the second side portion 240 in the lateral direction. The lower portion 400 is not connected to the first side portion 230. The lower portion 400 is located away from the impedance matching portion 300 in the vertical direction. The lower portion 400 is located below the impedance matching portion 300 in the vertical direction.

[0024] 9, a frame constituted by the first side portion 230, the second side portion 240, the upper frame portion 262, and the lower portion 400 constitutes an inductance component of the antenna member 100. As shown in FIG.

[0025] As shown in FIG. 8, power feeding section 500 of the present embodiment is made up of first power feeding section 510 and second power feeding section 520.

[0026] 9, the first power supply section 510 of the present embodiment is provided at the lower end in the up-down direction of the first side section 230. With reference to Fig. 2 and Fig. 8, when the antenna member 100 is mounted on the substrate 600, high frequency power is supplied to the first power supply section 510 from a high frequency source (not shown) via the power supply pattern of the substrate 600 (see Fig. 2).

[0027] 2 and 8, the second power supply section 520 of the present embodiment is provided at an end of the lower portion 400. More specifically, the second power supply section 520 is provided at the left end of the lower portion 400. The lower portion 400 is located above the second power supply section 520 in the up-down direction. The second power supply section 520 is connected to the ground pattern of the substrate 600 when the antenna member 100 is mounted on the substrate 600. That is, the lower portion 400 is connected to the ground of the substrate 600 only at the second power supply section 520 when the antenna member 100 is mounted on the substrate 600. Note that the present invention is not limited thereto, and the entire lower end of the lower portion 400 may be in contact with the ground of the substrate 600 when the antenna member 100 is mounted on the substrate 600.

[0028] As described above, the facing portion 220 constitutes the capacitance component of the antenna member 100, and the frame body constituted by the first side portion 230, the second side portion 240, the upper frame portion 262, and the lower portion 400 constitutes the inductance component of the antenna member 100. As a result, the facing portion 220 and the frame body constitute an LC resonant circuit. That is, the antenna member 100 has a split ring resonator structure constituted by the first side portion 230, the second side portion 240, the upper portion 260, and the lower portion 400.

[0029] As shown in FIG. 9, the impedance matching section 300 of this embodiment extends in the horizontal direction. More specifically, the impedance matching section 300 extends linearly in the horizontal direction. The impedance matching section 300 intersects with the up-down direction. More specifically, the impedance matching section 300 is perpendicular to the up-down direction. The impedance matching section 300 is located lower than the upper section 260 in the up-down direction. The impedance matching section 300 is located lower than the facing section 220 in the up-down direction. The impedance matching section 300 is located higher than the power supply section 500 in the up-down direction perpendicular to the horizontal direction. The impedance matching section 300 connects the first side section 230 and the second side section 240 to each other. The impedance matching section 300 adjusts the impedance of the antenna member 100 by the distance to the lower section 400 and the facing length. That is, the impedance of the antenna member 100 of this embodiment can be adjusted only by the relationship between the impedance matching section 300 and the lower section 400, which are members constituting the antenna member 100. This makes it difficult for the impedance adjustment to vary, compared to a case in which the ground of the substrate 600 is involved in the impedance adjustment of the antenna member.

[0030] The antenna member 100 of the present embodiment has the impedance matching section 300, and therefore the return loss characteristics of the antenna member 100 are improved compared to an antenna member not having the impedance matching section 300.

[0031] (Second embodiment) As shown in Fig. 13, an assembly 700A according to the second embodiment of the present invention is formed by mounting an antenna member 100A on a substrate 600A. The antenna member 100A of this embodiment is mounted on the substrate 600A and used as an antenna. Here, the substrate 600A has a power feed pattern (not shown) and a ground pattern (not shown).

[0032] As shown in Fig. 20, the antenna member 100A according to the second embodiment of the present invention has a similar configuration to the antenna member 100 according to the first embodiment described above (see Fig. 8), except that it does not have a lower portion 400. Therefore, among the components shown in Figs. 13 to 24, the same reference symbols are used for the same components as those in the first embodiment. Furthermore, hereinafter, the same expressions as those in the first embodiment are used for the orientations and directions in this embodiment.

[0033] As shown in FIG. 20, an antenna member 100A of the present embodiment has a split ring resonating section 200A, an impedance matching section 300A, and a power feeding section 500A.

[0034] As shown in FIG. 21, the split ring resonator 200A of the present embodiment has a substantially rectangular shape in a plane perpendicular to the front-rear direction. The split ring resonator 200A has a first side portion 230A, a second side portion 240A, and an upper portion 260. As shown in FIG. 20, the split ring resonator 200A is provided with an opposing portion 220 that constitutes a split 210. The opposing portion 220 constitutes a capacitance component of the antenna member 100A. Here, the upper portion 260, the split 210, and the opposing portion 220 of the present embodiment have the same structure as the upper portion 260, the split 210, and the opposing portion 220 of the first embodiment, so detailed description will be omitted.

[0035] 21, the first side portion 230A of the present embodiment extends in the up-down direction. The first side portion 230A defines the left end of the split ring resonator 200A in the lateral direction. The first side portion 230A is located to the left of the second side portion 240A in the lateral direction.

[0036] As shown in FIG. 21, the second side portion 240A of the present embodiment extends in the up-down direction. The second side portion 240A defines the right end in the horizontal direction of the split ring resonator 200A. The second side portion 240A is located away from the first side portion 230A in the horizontal direction. That is, the second side portion 240A is located to the right and away from the first side portion 230A in the horizontal direction. As shown in FIG. 20, the second side portion 240A has a fixing portion 242A.

[0037] 14 and 20, the fixing portion 242A of the present embodiment is fixed to the substrate 600A when the antenna member 100A is mounted on the substrate 600A. The fixing portion 242A defines the lower end of the antenna member 100A in the up-down direction. The fixing portion 242A extends downward from the lower end of the second side portion 240A.

[0038] As shown in FIG. 20, power feeding section 500A of the present embodiment is made up of first power feeding section 510A and second power feeding section 520A.

[0039] As shown in Fig. 20, the first power supply section 510A of the present embodiment is provided at the lower end in the up-down direction of the first side section 230A. With reference to Fig. 14 and Fig. 20, when the antenna member 100A is mounted on the board 600A, high frequency power is supplied to the first power supply section 510A from a high frequency source (not shown) via the power supply pattern of the board 600A.

[0040] As shown in Fig. 20, second power feeding portion 520A of the present embodiment is located at the lower end of fixed portion 242A. With reference to Fig. 14 and Fig. 20, second power feeding portion 520A is connected to the ground pattern of substrate 600A when antenna member 100A is mounted on substrate 600A.

[0041] As shown in FIG. 21, the impedance matching part 300A of the present embodiment extends in the horizontal direction. More specifically, the impedance matching part 300A extends linearly in the horizontal direction. The impedance matching part 300A intersects with the vertical direction. More specifically, the impedance matching part 300A is perpendicular to the vertical direction. The impedance matching part 300A is located below the upper part 260 in the vertical direction. The impedance matching part 300A is located below the facing part 220 in the vertical direction. The impedance matching part 300A is located above the power supply part 500A in the vertical direction perpendicular to the horizontal direction. The impedance matching part 300A connects the first side part 230A and the second side part 240A to each other. The impedance matching part 300A adjusts the impedance of the antenna member 100A by the distance to the ground of the substrate 600A and the facing length.

[0042] The antenna member 100A of the present embodiment has the impedance matching section 300A, and therefore the return loss characteristics of the antenna member 100A are improved compared to an antenna member not having the impedance matching section 300A.

[0043] 21, a member constituted by the first side portion 230A, the second side portion 240A, and the upper frame portion 262 constitutes an inductance component of the antenna member 100A. As described above, the facing portion 220 constitutes a capacitance component of the antenna member 100A, and therefore the above members and the facing portion 220 constitute an LC resonant circuit. With reference to FIG. 13, the assembly 700A has a split ring resonator structure constituted by the first side portion 230A, the second side portion 240A, the upper portion 260, and the ground of the substrate 600A.

[0044] Although the present invention has been specifically described above by way of the embodiment, the present invention is not limited thereto and various modifications are possible. In addition, a plurality of the above-described embodiments and modifications may be combined.

[0045] In the antenna members 100, 100A of the above-described embodiment, the facing portion 220 is provided on the upper side portion 260, but the present invention is not limited to this, and the facing portion 220 may be provided on the first side portion 230, 230A or the second side portion 240, 240A. However, in consideration of the possibility of utilizing secondary resonance, it is desirable that the facing portion 220 is provided on the upper side portion 260.

[0046] Although the split ring resonators 200 and 200A in the above-described embodiment have a substantially rectangular shape in a plane perpendicular to the front-rear direction, the present invention is not limited to this, and may have an arc shape or a polygonal shape, or may be a part of a polygonal shape. However, from the viewpoint of the strength of the split ring resonators 200 and 200A, it is preferable that the split ring resonators 200 and 200A have a rectangular or substantially rectangular shape.

[0047] Although the impedance matching part 300 in the first embodiment described above extends linearly in the lateral direction, the present invention is not limited to this, and may be configured to protrude forward or backward. By configuring the impedance matching part 300 in this manner, the capacitance of the capacitor between the impedance matching part 300 and the lower part 400 can be reduced. Note that if the impedance matching part 300 is too close to the facing part 220, the antenna characteristics deteriorate, so it is preferable that the impedance matching part 300 protrudes forward or backward at a position away from the facing part 220. Also, from the viewpoint of strength, it is preferable that the impedance matching part 300 extends linearly as in this embodiment.

[0048] In the first embodiment described above, the power supply unit 500 is provided at the lower end of the first side portion 230 and at the end of the lower side portion 400, but the present invention is not limited to this, and the power supply unit 500 may be provided at least on one of the first side portion 230 and the second side portion 240.

[0049] In the second embodiment described above, the power supply unit 500A is provided at the lower end of the first side portion 230A and the lower end of the fixed portion 242A, but the present invention is not limited to this, and the power supply unit 500A may be provided on at least one of the first side portion 230A and the second side portion 240A. [Explanation of symbols]

[0050] 100,100A Antenna parts (antenna) 200,200A split ring resonator 210 Split 220 Opposite part 222 Front facing part 224 Rear facing part 230,230A First side 240,240A Second side 242,242A Fixed part 260 Upper part 262 Upper frame 2622 Right side 2624 Left 300,300A impedance matching section 400 Lower part 500,500A power supply 510,510A First power supply 520,520A Second power supply 600,600A board 700,700A assembly

Claims

1. An antenna member mounted on a substrate and used as an antenna, The antenna member has a split ring resonator, an impedance matching section, and a power supply section, The split ring resonator is provided with opposing portions that form a split, the split ring resonator has a first side, a second side, and a top side; the second side is laterally spaced from the first side, The upper portion has the opposing portion, the upper portion electromagnetically connects the first side portion and the second side portion to each other; the power supply unit is provided on at least one of the first side portion and the second side portion, The impedance matching portion is located above the power supply portion in a vertical direction perpendicular to the horizontal direction, and connects the first side portion and the second side portion to each other. Antenna components.

2. 2. The antenna member of claim 1, The impedance matching portion is located lower than the facing portion in the up-down direction. Antenna components.

3. 3. The antenna member according to claim 1, The split ring resonator further includes a lower portion, the lower portion extends from the second side portion toward the first side portion, The lower portion is located away from the impedance matching portion in the up-down direction and is located below the impedance matching portion. Antenna components.

4. 4. The antenna member according to claim 3, The power supply unit includes a first power supply unit and a second power supply unit, the first power supply portion is provided at a lower end of the first side portion in the up-down direction, The second power supply portion is provided at an end portion of the lower portion. Antenna components.

5. 5. An assembly comprising the antenna member according to claim 1 mounted on the substrate.

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