Antenna unit and metal pattern

Abstract

Ensure that the touch function works correctly in the antenna unit. [Solution] The antenna unit AU1 comprises an antenna 200 having a first electrode 11, a second electrode 12 located adjacent to the first electrode 11 in a first direction D1, a third electrode 13 located adjacent to the first electrode 11 in the opposite direction to the first direction D1, and a first radiating portion 211 provided on the upper layer of the first electrode 11 and extending in a second direction D2 perpendicular to the first direction D1. The first radiating portion 211 overlaps with the first electrode 11 in a top view.

Description

Technical Field

[0001] The present disclosure relates to an antenna unit and a metal pattern.

Background Art

[0002] Conventionally, as an antenna unit combining an electrode and an antenna constituting a touch sensor or the like, for example, the one disclosed in Patent Document 1 is known.

[0003] Specifically, Patent Document 1 discloses an antenna unit (touch sensor panel 10) including a film-like substrate 20, a touch sensor unit 12 provided on the substrate 20, and an antenna 16 provided on the substrate 20. The touch sensor unit 12 has a sensor unit 18a. The sensor unit 18a includes a first conductive layer 30 and a second conductive layer 40. The antenna 16 is arranged so as to be orthogonal to the first conductive layer 30 or the second conductive layer 40. In a top view, the antenna 16 overlaps with the first conductive layer 30 (or the second conductive layer 40) orthogonal to the antenna 16.

[0004] In the sensor unit 18a, a plurality of first conductive layers 30 extending in the E1-axis direction are arranged with an interval in the E2-axis direction. Also, a plurality of second conductive layers extending in the E2-axis direction are arranged with an interval in the E1-axis direction.

[0005] The antenna 16 is provided so as to overlap with the first conductive layer 30 and the second conductive layer 40 of the sensor unit 18a at the upper end portion 12h or the side end portion 12f of the touch sensor unit 12. Patent Document 1 discloses an example in which the antenna 16 is provided in a region where the first conductive layer 30 or the second conductive layer 40 is not formed on the same plane as the first conductive layer 30 or the second conductive layer 40.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

[0007] Incidentally, as mentioned above, the antenna 16 disclosed in Patent Document 1 is provided so as to overlap with the first conductive layer 30 or the second conductive layer 40. In this case, the capacitance formed between the antenna 16 and the first conductive layer 30 or the second conductive layer 40 capacitively couples with the capacitance formed between the first conductive layer 30 or the second conductive layer 40 and the user's fingers.

[0008] Therefore, when a user touches the surface with their finger, the change in capacitance formed between the first conductive layer 30 or the second conductive layer 40 and the user's finger may be hindered. In other words, the change in capacitance formed between the first conductive layer 30 or the second conductive layer 40 and the user's finger may become less pronounced. This could lead to touch malfunctions or reduced sensitivity, potentially causing the touch function to fail to operate properly.

[0009] This disclosure has been made in view of the above, and its purpose is to enable the touch function to operate normally in the antenna unit. [Means for solving the problem]

[0010] To achieve the above objective, this disclosure relates to an antenna unit, the antenna unit comprising: a first electrode; a second electrode located adjacent to the first electrode in a first direction; a third electrode located adjacent to the first electrode in a direction opposite to the first direction; and an antenna provided on the upper layer of the first electrode and having a first radiating portion extending in a second direction perpendicular to the first direction. The first radiating portion overlaps with the first electrode in a top view, does not overlap with the second electrode in a top view, and does not overlap with the third electrode in a top view. The length of the first radiating portion along the first direction is shorter than the length between the second electrode and the third electrode. [Effects of the Invention]

[0011] According to this disclosure, the touch function can be operated normally in the antenna unit. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a plan view of the antenna unit according to the first embodiment. [Figure 2] Figure 2 is a cross-sectional view taken along line II-II in Figure 1. [Figure 3] Figure 3 is a conceptual diagram showing the behavior of electric field lines of the sensor unit (touch sensor) according to the first embodiment. [Figure 4] Figure 4 is a conceptual diagram showing the behavior of electric field lines in the sensor (touch sensor) when capacitively coupled. [Figure 5] Figure 5 is a magnified view of section V shown in Figure 1. [Figure 6] Figure 6 is a plan view (corresponding to Figure 1) of an antenna unit according to Modification 1 of the first embodiment. [Figure 7] Figure 7 is a plan view (corresponding to Figure 1) of the antenna unit according to the second embodiment. [Figure 8] Figure 8 is a diagram corresponding to Figure 2 according to the second embodiment. [Figure 9] Figure 9 is a diagram corresponding to Figure 3 according to the second embodiment. [Figure 10] Figure 10 is a plan view (corresponding to Figure 1) of the antenna unit according to the third embodiment. [Figure 11] Figure 11 is a diagram corresponding to Figure 2 according to the third embodiment. [Figure 12] Figure 12 is a diagram corresponding to Figure 3 according to the third embodiment. [Figure 13] Figure 13 is a diagram corresponding to Figure 1 according to the fourth embodiment. [Modes for carrying out the invention]

[0013] Hereinafter, each embodiment of the present disclosure will be described in detail based on the drawings. Note that the description of each of the following embodiments is merely illustrative in nature and is not intended to limit the present disclosure, its applications, or its uses.

[0014] [First Embodiment] (Antenna Unit) FIG. 1 is a plan view partially enlarged of an antenna unit AU1 according to the first embodiment. As shown in FIGS. 1 and 2, the antenna unit AU1 according to the first embodiment of the present disclosure includes a sensor unit 100 (touch sensor) and an antenna 200.

[0015] Here, in the following description, the direction from the lower side to the upper side of the paper surface of FIG. 1 (the direction of D1 shown in the figure) is defined as the "first direction". The direction from the left side to the right side of the paper surface of FIG. 1 (the direction of D2 shown in the figure) is defined as the "second direction".

[0016] Also, in the first embodiment, with the side on which the first substrate 110 (described later) shown in FIG. 2 is located as the "lower side" of the antenna unit AU1 and the side on which the second substrate 120 (described later) is located as the "upper side" of the antenna unit AU1, the positional relationship of each element constituting the antenna unit AU1 is determined. Note that such a positional relationship is independent of the actual up and down directions in the device or apparatus on which the antenna unit AU1 is mounted.

[0017] (Substrate) As shown in FIG. 1, the substrate B is formed in a substantially rectangular shape in a top view, for example. The substrate B has transparency and insulation. Preferably, the substrate B has flexibility.

[0018] As shown in FIG. 2, the substrate B includes a first substrate 110 and a second substrate 120. The first substrate 110 and the second substrate 120 are formed in a film shape.

[0019] The first substrate 110 is formed of a resin material having transparency and insulation.

[0020] The second substrate 120 is laminated on top of the first substrate 110 via an adhesive layer 140. The second substrate 120 is formed of a resin material that is transparent and insulating. The second substrate 120 may be formed of the same resin material as the first substrate 110, or it may be formed of a different resin material.

[0021] (Sensor unit) The sensor unit 100 (touch sensor) illustrated in this embodiment is a capacitive sensor-type input device. The sensor unit 100 (touch sensor) can be applied to, for example, in-vehicle devices such as car navigation systems, personal computer displays, mobile phones, personal digital assistants, portable game consoles, photocopiers, ticket vending machines, ATMs, watches, and the like. In particular, when applied to watches, smartwatches are preferred.

[0022] (Sensor electrode) As shown in Figure 2, the sensor unit 100 (touch sensor) is equipped with multiple sensor electrodes S using a self-capacitive capacitance method. The multiple sensor electrodes S are composed of multiple transmitting electrodes 10.

[0023] (Transmitting electrode) Multiple transmitting electrodes 10 are provided on the upper surface 110a of the first substrate 110 (see Figure 2). As shown in Figure 1, the multiple transmitting electrodes 10 are spaced apart from each other in the first direction D1. Furthermore, the multiple transmitting electrodes 10 are spaced apart from each other in the second direction D2. Although not shown in the figure, each transmitting electrode 10 includes a wiring pattern 15 (e.g., a mesh pattern) formed by multiple metal wires (described later), similar to the radiating portion 210 described later.

[0024] In Figure 1, the transmitting electrode 10 that overlaps with the radiating section 210 (first radiating section 211), which will be described later, will be referred to as the first electrode 11 for the sake of explanation. The transmitting electrodes 10 adjacent to the first electrode 11 along the first direction D1 will be referred to as the second electrode 12 and the third electrode 13. The transmitting electrode 10 adjacent to the first electrode 11 along the second direction D2 will be referred to as the fourth electrode 14. In other words, the multiple transmitting electrodes 10 have the first electrode 11, the second electrode 12, the third electrode 13, and the fourth electrode 14.

[0025] (Capacitance) Let's explain capacitance here. Figure 3 is a conceptual diagram showing the behavior of electric field lines of the transmitting electrode 10. The left side of Figure 3 shows the electric field lines between the transmitting electrode 10 and the user's fingers. The right side of Figure 3 shows the electric field lines between the electrodes of a capacitor, when the transmitting electrode 10 and the user's fingers are considered as the electrodes of a capacitor. The electric field lines that originate near the center of the transmitting electrode 10 and are absorbed by the user's fingers are linear. The electric field lines that originate from the periphery of the transmitting electrode 10 and are absorbed by the user's fingers are curved, bulging outward from between the transmitting electrode 10 and the fingertips.

[0026] When a user touches the sensor unit 100 (touch sensor) with their finger or other object, a capacitance C1 is formed between the transmitting electrode 10 (corresponding to the first electrode 11, second electrode 12, and third electrode 13 described later in the first embodiment of this disclosure) and the user's finger. When capacitance C1 is formed, the change between the capacitance at the reference time and the capacitance when capacitance C1 is formed is detected, and the touch operation is perceived.

[0027] (capacitive coupling) Figure 4 is a conceptual diagram showing the behavior of electric field lines of the transmitting electrode 10 and the first radiating portion 211, which will be described later. The left side of Figure 4 shows the electric field lines between the transmitting electrode 10, the first radiating portion 211, and the user's fingers. The right side of Figure 4 shows the electric field lines between the electrodes of a capacitor, when the transmitting electrode 10, the first radiating portion 211, and the user's fingers are considered as the electrodes of a capacitor. For example, when the first radiating portion 211, which will be described later, overlaps with the first electrode 11 in a top view (see Figure 1), a capacitance C2 is formed between the first radiating portion 211 and the first electrode 11, as shown in Figure 4. Also, a capacitance C3 is formed between the user's fingers and the first radiating portion 211. That is, capacitance C2 and capacitance C3 are connected in series. In other words, the first radiating portion 211 and the first electrode 11 are capacitively coupled.

[0028] Similarly, as described above, the first radiating portion 211 overlaps with the second electrode 12 in a top view, forming a capacitance C4 between the first radiating portion 211 and the second electrode 12. In other words, capacitance C4 and capacitance C3 are connected in series. To put it another way, the first radiating portion 211 and the second electrode 12 are capacitively coupled.

[0029] Based on the above, if the width of the first radiating portion 211 is wide and, when viewed from above, the first radiating portion 211 overlaps both the first electrode 11 and the second electrode 12, then the first electrode 11 and the second electrode 12 will be pseudo-capacitively coupled. Due to this pseudo-capacitive coupling between the first electrode 11 and the second electrode 12, even if only the first electrode 11 is touched, the capacitance of both the first electrode 11 and the second electrode 12 will change. Therefore, there is a risk that the sensor unit 100 (touch sensor) may malfunction.

[0030] Furthermore, if the entire first electrode 11 overlaps with the first radiating portion 211, the first electrode 11 cannot exchange electric field lines with the user's fingers even when a touch operation occurs. In such cases, the sensor portion 100 (touch sensor) may malfunction.

[0031] (First electrode) As shown in Figure 1, the first electrode 11 has a first side 11a extending along the second direction D2 and a second side 11b facing the first side 11a in the first direction D1. In other words, the first electrode 11 has a first side 11a extending along the second direction D2 and a second side 11b extending along the second direction D2 and facing the first side 11a. The first side 11a does not overlap with the first radiating portion 211 in a top view. The second side 11b does not overlap with the first radiating portion 211 in a top view.

[0032] This configuration ensures that the first radiating portion 211 does not obstruct curved electric field lines. Furthermore, compared to the case where the first radiating portion 211 overlaps with the first side 11a in a top view, the distance between the first radiating portion 211 and the second electrode 12 (described later) can be increased. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the second electrode 12 can be reduced. Similarly, compared to the case where the first radiating portion 211 overlaps with the second side 11b in a top view, the distance between the first radiating portion 211 and the third electrode 13 can be increased. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the third electrode 13 can be reduced. As a result of these considerations, a reduction in the sensitivity of the sensor unit 100 (touch sensor) can be suppressed.

[0033] (Second electrode) As shown in Figure 1, the second electrode 12 is located adjacent to the first electrode 11 in the first direction D1. In other words, the second electrode 12 is located on the side of the first direction D1 relative to the first electrode 11. Also, the second electrode 12 is adjacent to the first electrode 11. Furthermore, as shown in Figure 2, the second electrode 12 is provided on the same layer as the first electrode 11.

[0034] (Third electrode) As shown in Figure 1, the third electrode 13 is located adjacent to the first electrode 11 in the direction opposite to the first direction D1. In other words, the third electrode 13 is located on the side of the first electrode 11 that is opposite to the first direction D1. The third electrode 13 is also adjacent to the first electrode 11. Furthermore, the third electrode 13 is provided in the same layer as the first electrode 11.

[0035] (Fourth electrode) As shown in Figure 1, the sensor unit 100 further includes a fourth electrode 14. The fourth electrode 14 is located adjacent to the first electrode 11 in the second direction D2.

[0036] (antenna) As shown in Figure 1, the antenna unit AU1 of this embodiment is equipped with two antennas 200, 200. Antenna 200 is applicable to equipment for performing communication between 3G and 5G, for example. The communication frequency of antenna 200 is a predetermined frequency band, for example, 0.5GHz to 30GHz. Specifically, the communication frequencies of antenna 200 are 700MHz / 800MHz / 900MHz, 1.5GHz, 1.7GHz, 2GHz, 2.4GHz, 3.4GHz / 3.5GHz, 3.7GHz / 4.5GHz, 5.0GHz, 6.0GHz, or 28GHz, etc.

[0037] In this disclosure, a monopole antenna is used as antenna 200, but it is not limited to this. Antenna 200 may also be a dipole antenna.

[0038] As shown in Figure 2, the antenna 200 is provided on the upper layer of the first electrode 11. In other words, the antenna 200 is provided on the second substrate 120, which is located on the upper surface 110a side of the first substrate 110. The antenna 200 is located on the upper surface 120a of the second substrate 120.

[0039] (Antenna wiring pattern) As shown in Figure 5, the antenna 200 includes a wiring pattern 15. The wiring pattern 15 is formed by arranging multiple cells 17, each consisting of multiple conductive wires 16. Each conductive wire 16 is made of a thin conductive metal wire.

[0040] The multiple conductive wires 16 extend diagonally with respect to each of the first direction D1 and the second direction D2 shown in Figure 5. The metal thin wire may also extend along either the first direction D1 or the second direction D2.

[0041] Cell 17 is composed of multiple conductive wires 16 that are electrically conductive to each other. Cell 17 has a rectangular shape. In this embodiment, the rectangular shape is a rhombus. Although not shown, the rectangular shape may also be a parallelogram, a square, or a rectangle. Furthermore, the shape of cell 17 is not limited to the above rectangular shape, and may also be a curved shape or a circle (not shown). Furthermore, although not shown, the wiring pattern 15 may be formed as a random mesh pattern of random shapes including cells such as curved shapes or circles.

[0042] The antenna 200 includes a wiring pattern 15 formed by multiple thin metal wires. Specifically, the first radiating section 211 (first excitation element) is formed by a mesh of thin metal wires. This configuration allows electric field lines to pass through the mesh-like openings more easily. Therefore, a decrease in the sensitivity of the sensor section 100 (touch sensor) can be suppressed.

[0043] (Radiating section) The antenna 200 has a radiating section 210. The radiating section 210 has the function of generating radio waves into space or receiving radio waves from space. As shown in Figure 1, the radiating section 210 illustrated in the first embodiment is composed of a first radiating section 211 and a second radiating section 212. That is, the antenna 200 has a first radiating section 211. The antenna 200 further has a second radiating section 212. Each of the first and second radiating sections 211 and 212 has a first potential.

[0044] (First radiation part) The first radiating section 211 is configured to correspond to a communication frequency in the 2.4 GHz band, for example. As shown in Figure 1, the first radiating section 211 extends in a second direction D2 that is perpendicular to the first direction D1. The length of the first radiating section 211 in the first direction D1 is set to 1 / 4 the length of λ1, where λ1 is the wavelength of the electric field corresponding to the 2.4 GHz band communication frequency.

[0045] As shown in Figure 2, the first radiating unit 211 is positioned above the first electrode 11, the second electrode 12, and the third electrode 13. This allows the radio waves emitted from the first radiating unit 211 to be radiated away from the metal, such as the sensor unit 100 (touch sensor). Therefore, the emitted radio waves are not obstructed.

[0046] As shown in Figure 1, the first radial portion 211 extends in a second direction D2 perpendicular to the first direction D1. Here, in this disclosure, an object extending in the first direction D1 means that the length of the object along the first direction D1 is longer than the length of the object along the direction perpendicular to the first direction D1.

[0047] As shown in Figure 1, the length L1 of the first radiating portion 211 along the first direction D1 is shorter than the length L3 of the first electrode 11 along the first direction D1. That is, the first electrode 11 has a portion that does not overlap with the first radiating portion 211 when viewed from above.

[0048] This configuration ensures that the first radiating portion 211 does not obstruct curved electric field lines. Furthermore, compared to the case where the first radiating portion 211 overlaps with the first side 11a in a top view, the distance between the first radiating portion 211 and the second electrode 12 can be increased. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the second electrode 12 can be reduced. Similarly, compared to the case where the first radiating portion 211 overlaps with the second side 11b in a top view, the distance between the first radiating portion 211 and the third electrode 13 can be increased. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the third electrode 13 can be reduced. As a result of these factors, a reduction in the sensitivity of the sensor unit 100 (touch sensor) can be suppressed.

[0049] As shown in Figure 1, the first radiating portion 211 overlaps with the first electrode 11 when viewed from above. Also, the first radiating portion 211 does not overlap with the second electrode 12 when viewed from above. Furthermore, the first radiating portion 211 does not overlap with the third electrode 13 when viewed from above.

[0050] As shown in Figure 1, the length L1 of the first radiating portion 211 along the first direction D1 is shorter than the length L2 between the second electrode 12 and the third electrode 13. Length L2 is the length along the first direction D1. That is, the width of the first radiating portion 211 is narrower than the length L2 between the second electrode 12 and the third electrode 13. Also, the first radiating portion 211 is located between the second electrode 12 and the third electrode 13.

[0051] As shown in Figure 1, the length L1 of the first radiating portion 211 in this disclosure along the first direction D1 is shorter than the length L2 between the second electrode 12 and the third electrode 13 along the first direction D1. Also, the first radiating portion 211 overlaps with the first electrode 11 in a top view. The first radiating portion 211 does not overlap with the second electrode 12 in a top view.

[0052] With this configuration, even if the first radiating portion 211 and the first electrode 11 are capacitively coupled, the first radiating portion 211 and the second electrode 12 are not capacitively coupled. This prevents pseudo-capacitive coupling between the first electrode 11 and the second electrode 12. Therefore, malfunctions of the sensor portion 100 (touch sensor) can be prevented.

[0053] Furthermore, since the first electrode 11 has a portion that does not overlap with the first radiating portion 211 when viewed from above, it becomes possible to exchange electric field lines between the first electrode 11 and the user's fingers. Therefore, the sensor portion 100 (touch sensor) can be operated normally in the antenna unit.

[0054] As shown in Figure 1, the first radiating portion 211 does not overlap with the fourth electrode 14 in a top view. As a result, even if the first radiating portion 211 and the first electrode 11 are capacitively coupled, the first radiating portion 211 and the fourth electrode 14 are not capacitively coupled. This configuration prevents pseudo-capacitive coupling between the first electrode 11 and the fourth electrode 14. Therefore, malfunctions of the sensor unit 100 (touch sensor) can be prevented.

[0055] As shown in Figure 1, the antenna 200 further has a feed point 211a that supplies power to the first radiating section 211 (first radiating element). The feed point 211a is located in the opposite direction to the second direction D2 of the first electrode 11. In other words, the feed point 211a is located on the side of the first electrode 11 that is opposite to the second direction D2.

[0056] The feed point 211a is configured as the end of the first radiating section 211 located on the left side of the page in Figure 1 (the end located closer to the periphery of the first substrate 110). The feed point 211a is electrically connected to the flexible wiring board. A transmission wave is supplied to the feed point 211a via the flexible wiring board from a power supply device (not shown) through a communication device.

[0057] In this configuration, the power supply point 211a is positioned away from the first electrode 11. Therefore, the first electrode 11 can be made less susceptible to the influence of the electric field generated from the power supply point 211a.

[0058] (Second Radiation Section) The second radiating unit 212 corresponds to a communication frequency different from that of the first radiating unit 211. For example, the second radiating unit 212 corresponds to a communication frequency in the 5.0 GHz band.

[0059] As shown in Figure 1, the second radiating section 212 extends from the first branch electrode section 213 (described later) in the second direction D2. The second radiating section 212 is separated from the first radiating section 211 in the first direction D1. The length of the second radiating section 212 is shorter than the length of the first radiating section 211. Specifically, the total length of the second radiating section 212 is set to 1 / 4 the length of λ2, where λ2 is the wavelength of the electric field corresponding to the 5.0 GHz band communication frequency.

[0060] This configuration allows the second radiating unit 212 to respond to radio waves in a different frequency band than the first radiating unit 211.

[0061] (Branching electrode section) Furthermore, as shown in Figure 1, the antenna 200 further includes a first branch electrode section 213 and a second branch electrode section 214.

[0062] The first branch electrode section 213 is located in the first direction D1 of the first radiating section 211. In other words, the first branch electrode section 213 is located on the side of the first direction D1 relative to the first radiating section 211. The second branch electrode section 214 is located in the direction opposite to the first direction D1 of the first radiating section 211. In other words, the second branch electrode section 214 is located on the side of the first radiating section 211 in the direction opposite to the first direction D1.

[0063] In this configuration, an electric field is generated between each of the first and second radiating portions 211, 212 and each of the first and second branching electrode portions 213, 214 in a direction along the plane of the upper surface 120a of the second substrate 120 (i.e., the in-plane direction of the plane consisting of the first direction D1 and the second direction D2). Therefore, the electric field does not interfere with the sensor electrode S. This ensures the antenna characteristics of the antenna 200.

[0064] Each of the first and second branch electrode sections 213 and 214 has a second potential that is lower than the potential of the radiating section 210 (first potential). The second potential is, for example, the ground potential (GND). Note that the second potential is not limited to the ground potential (GND) and only needs to be lower than the potential of the radiating section 210.

[0065] As shown in Figure 1, each of the first and second branch electrode sections 213 and 214 has a feed point 213a and 214a. The feed points 213a and 214a are the ends of each of the first and second branch electrode sections 213 and 214 located closer to the first radiating section 211. The feed points 213a and 214a are electrically connected to the flexible wiring board. The feed points 213a and 214a are set to a second potential in a power supply device (not shown).

[0066] (Impedance matching element) Furthermore, as shown in Figure 1, the antenna 200 further includes an impedance matching element 215. The impedance matching element 215 has the function of adjusting the impedance matching in the antenna 200. The impedance matching element 215 connects the second branch electrode section 214 and the first radiating section 211. That is, the impedance matching element 215 electrically connects the second branch electrode section 214 and the first radiating section 211. Note that the impedance matching element 215 only needs to be configured to electrically connect the radiating section 210 (either the first or second radiating section 211, 212) and either the first or second branch electrode section 213, 214.

[0067] This configuration allows for adjustment of impedance matching in antenna 200.

[0068] (Dummy pattern) As shown in Figure 5, the antenna unit AU1 further includes a dummy pattern 220. The dummy pattern 220 includes a wiring pattern 15 (shown in Figure 4). The wiring pattern 15 is formed by arranging multiple cells 17, each consisting of multiple conductive wires 16. The dummy pattern 220 is located on the same layer as the antenna 200. The dummy pattern 220 is spaced apart from the antenna 200. Specifically, the antenna 200 and the dummy pattern 220 are separated by a distance DP shown in Figure 5.

[0069] Each conductive wire 16 is made of a conductive metal wire. In other words, the dummy pattern 220 is formed by multiple metal wires. The following description of the conductive wires 16 is the same as that of the sensor electrodes S, so it will be omitted.

[0070] As shown in Figure 5, the unit structure of the dummy pattern 220 is the same shape as the unit structure of the wiring pattern 15. Here, "same shape" includes the range of manufacturing tolerances. Furthermore, even if the dummy pattern 220 or the wiring pattern 15 each contains a slit 18 containing defects, the slit 18 is not taken into consideration, and if the overall shape is the same, they are considered to be the same shape.

[0071] This configuration reduces the visual difference between the area where the first radiating section 211 (first excitation element) is located and the area where the first radiating section 211 (first excitation element) is not located. Therefore, it becomes more difficult for the user of the antenna unit AU1 to see the first radiating section 211 (first excitation element).

[0072] As shown in Figure 5, the dummy pattern 220 has a slit 18. This configuration makes it less likely for the dummy pattern 220 to obstruct the electric field lines exchanged between the sensor electrode S (touch electrode) and the finger on the same plane as the second substrate 120. Therefore, the influence of the dummy pattern 220 on the performance of the touch operation can be reduced. In addition, the dummy pattern 220 makes it less likely for the electromagnetic waves radiated from the first radiating section 211 (first excitation element) on the same plane as the second substrate 120. Therefore, the influence of the dummy pattern 220 on the performance of the antenna 200 can be reduced.

[0073] [Example 1] In the above embodiment, the first radiating portion 211 is shown not overlapping with either the first side 11a or the second side 11b of the first electrode 11, but the embodiment is not limited to this. For example, it may be configured as in the modified example 1 shown in Figure 6.

[0074] Figure 6 is a plan view of the antenna unit AU2 according to modification 1 of the first embodiment. As shown in Figure 6, the first side 11a overlaps with the first radiating section 211 when viewed from above. The second side 11b does not overlap with the first radiating section 211 when viewed from above.

[0075] As a result, the area overlapping with the first radiating portion 211 near the center of the first electrode 11 is narrowed. In other words, linear electric field lines are less likely to be obstructed. Therefore, the exchange of electric field lines between the sensor electrode S and the user's fingers can be performed quickly.

[0076] [Second Embodiment] In the first embodiment described above, the antenna unit AU1 is shown to be equipped with a self-capacitive type sensor unit 100 (touch sensor), but the embodiment is not limited to this. For example, it may be configured as in the second embodiment shown in Figure 7. The same reference numerals are used for components that are the same as in the first embodiment.

[0077] Figure 7 is a partially enlarged view of the antenna unit AU3 according to the second embodiment. While the sensor unit 100 (touch sensor) according to the first embodiment uses a self-capacitance method, the sensor unit 100 (touch sensor) according to the second embodiment uses a mutual-capacitance method. Furthermore, as shown in Figure 8, the sensor unit 100 (touch sensor) according to the second embodiment is composed of a plurality of transmitting electrodes 20 and receiving electrodes 30.

[0078] The antenna unit AU3 according to the second embodiment differs from the first embodiment in that it has two substrates B (first substrate 110 and third substrate 130) below the second substrate 120. The specific configuration of the third substrate 130 is the same as that of the first substrate 110 in the first embodiment. As shown in Figure 8, the third substrate 130, which is located below the second substrate 120, is provided with a receiving electrode 30. The first substrate 110, which is located below the third substrate 130, is provided with a transmitting electrode 20.

[0079] (Sensor electrode) The antenna unit AU3 is equipped with multiple sensor electrodes S using a capacitive method. As shown in Figure 7, the multiple sensor electrodes S are composed of multiple transmitting electrodes 20 and multiple receiving electrodes 30 (multiple electrodes). In the following description, the transmitting electrodes 20 and receiving electrodes 30 may be referred to as sensor electrodes S.

[0080] As shown in Figure 7, each transmitting electrode 20 and each receiving electrode 30 are arranged so as to intersect (orthogonal to) each other in a plan view.

[0081] Multiple transmitting electrodes 20 are provided on the upper surface 110a of the first substrate 110 (see Figure 8). As shown in Figure 7, each transmitting electrode 20 extends along the first direction D1. The multiple transmitting electrodes 20 are spaced apart from each other in the second direction D2. The configuration of each transmitting electrode 20 is the same as that of the transmitting electrode 10 according to the first embodiment, so a detailed explanation is omitted.

[0082] Multiple receiving electrodes 30 are provided on the upper surface 130a of the third substrate 130 (see Figure 8). The multiple receiving electrodes 30 are insulated from the multiple transmitting electrodes 20 via the third substrate 130. As shown in Figure 7, each receiving electrode 30 extends along the second direction D2. The multiple receiving electrodes 30 are spaced apart from each other in the first direction D1. Note that the configuration of each receiving electrode 30 is the same as that of the transmitting electrode 10 according to the first embodiment, so a description is omitted.

[0083] In Figure 7, the receiving electrode 30 that overlaps with the first radiating portion 211 will be referred to as the first electrode 31 for the sake of explanation. The receiving electrodes 30 adjacent to the first electrode 31 along the first direction D1 will be referred to as the second electrode 32 and the third electrode 33.

[0084] (Capacitance) Figure 9 is a conceptual diagram showing the behavior of electric field lines of the sensor electrode S. The electric field lines that originate near the center of the transmitting electrode 20 and are absorbed by the receiving electrode 30 are linear. The electric field lines that originate from the periphery of the transmitting electrode 20 and are absorbed by the receiving electrode 30 are curved, bulging outward from between the transmitting electrode 20 and the receiving electrode 30. A capacitance C5 is formed between the transmitting electrode 20 and the receiving electrode 30.

[0085] When a user touches the sensor unit 100 (touch sensor) with their finger or other object, a capacitance C6 is formed between the sensor electrode S (corresponding to the first electrode 31, second electrode 32, and third electrode 33 according to the second embodiment of this disclosure) and the user's finger. When capacitance C6 is formed, the change in capacitance C5 between the reference capacitance C5 and the capacitance C5 when capacitance C6 is formed is detected, and the touch operation is perceived.

[0086] [Differentiation 2] In the second embodiment described above, the antenna unit AU3 is shown to include a first substrate 110 and a third substrate 130, but it is not limited to this configuration. For example, the antenna unit AU4 may include only the first substrate 110 (not shown). In this case, the receiving electrode 30 is provided on the upper surface of the first substrate 110. The transmitting electrode 20 is provided on the lower surface of the first substrate 110.

[0087] [Third Embodiment] In the first embodiment described above, the antenna unit AU1 is shown to be equipped with a self-capacitive type sensor unit 100 (touch sensor), but the embodiment is not limited to this. For example, it may be configured as in the third embodiment shown in Figure 10. The same reference numerals are used for components that are the same as in the first embodiment.

[0088] Figure 10 is a partially enlarged view of the antenna unit AU5 according to the third embodiment. The sensor unit 100 (touch sensor) according to the third embodiment uses a mutual capacitance method. Also, as shown in Figure 11, the sensor unit 100 (touch sensor) according to the third embodiment is formed from a single layer (first substrate 110).

[0089] The antenna unit AU5 according to the third embodiment includes a first substrate 110 on the underside of the second substrate 120. However, it differs from the first embodiment in that the transmitting electrode 40 and the receiving electrode 50 are provided on the same surface of the first substrate 110. In the following description, the transmitting electrode 40 and the receiving electrode 50 may be referred to as sensor electrodes S.

[0090] (Sensor electrode) The antenna unit AU5 is equipped with multiple sensor electrodes S using a capacitive method. As shown in Figure 10, the multiple sensor electrodes S are composed of multiple transmitting electrodes 40 and multiple receiving electrodes 50.

[0091] Multiple transmitting electrodes 40 and multiple receiving electrodes 50 are arranged on the first substrate 110 at positions corresponding to the active area. The sensor unit 100 (touch sensor) is capable of detecting touch operations by the user's fingers (object to be detected) that come into contact with the operating surface through the multiple transmitting electrodes 40 and multiple receiving electrodes 50 located in the active area.

[0092] Each transmitting electrode 40 is connected to a drive circuit of an IC device (not shown) via a flexible wiring board. Each transmitting electrode 40 is configured to radiate an electric field into its surroundings by the drive circuit. A predetermined pulse potential is applied to the multiple transmitting electrodes 40 to radiate an electric field.

[0093] Each receiving electrode 50 is connected to a detection circuit of an IC device (not shown) via a flexible wiring board. Each receiving electrode 50 is configured to detect the electric field radiated from each transmitting electrode 40. A predetermined potential is constantly applied to the multiple receiving electrodes 50 to detect the electric field radiated from the multiple transmitting electrodes 40.

[0094] As shown in Figure 10, each transmitting electrode 40 and each receiving electrode 50 are arranged adjacent to each other in a plan view. Each adjacent transmitting electrode 40 and each receiving electrode 50 are configured as an electrode pair capable of generating capacitance.

[0095] Multiple transmitting electrodes 40 are provided on the upper surface 110a of the first substrate 110 (see Figure 11). As shown in Figure 10, each transmitting electrode 40 is formed in the shape of a rectangle. Each side of the rectangle is arranged diagonally with respect to the first direction D1 and the second direction D2. Multiple transmitting electrodes 40 are spaced apart from each other. Each transmitting electrode 40 is spaced apart from each other in the first direction D1. Also, multiple transmitting electrodes 40 are spaced apart from each other in the second direction D2. Note that the configuration of each transmitting electrode 40 is the same as that of the transmitting electrode 10 according to the first embodiment, so a description is omitted.

[0096] In Figure 10, the transmitting electrode 40 that overlaps with the first radiating section 211 will be referred to as the first electrode 41 for the sake of explanation. The transmitting electrodes 40 adjacent to the first electrode 41 along the first direction D1 will be referred to as the second electrode 42 and the third electrode 43.

[0097] Multiple receiving electrodes 50 are provided on the upper surface 110a of the first substrate 110 (see Figure 11). As shown in Figure 10, each receiving electrode 50 is formed in the shape of a rectangle. Each side of the rectangle is arranged diagonally with respect to the first direction D1 and the second direction D2. Multiple receiving electrodes 50 are arranged with space between them. In other words, each receiving electrode 50 is arranged surrounded by the transmitting electrode 40. Note that the configuration of each receiving electrode 50 is the same as that of the transmitting electrode 10 according to the first embodiment, so a description is omitted.

[0098] (Capacitance) Figure 12 is a conceptual diagram showing the behavior of electric field lines of the sensor unit 100 (touch sensor). The electric field lines generated from the transmitting electrode 40 and absorbed by the receiving electrode 50 are curved. A capacitance C7 is formed between the transmitting electrode 40 and the receiving electrode 50.

[0099] When a user touches the sensor unit 100 (touch sensor) with their finger or other object, a capacitance C8 is formed between the sensor electrode S (corresponding to the first electrode 41, second electrode 42, and third electrode 43 according to the third embodiment of this disclosure) and the user's finger. When capacitance C8 is formed, the change in capacitance C7 between the reference capacitance C7 and the capacitance C7 when capacitance C8 is formed is detected, and the touch operation is perceived.

[0100] [Fourth Embodiment] In the first to third embodiments described above, antenna units AU1 to AU5 are shown, but the system is not limited to these configurations. For example, it may be configured as in the fourth embodiment shown in Figure 13. Components identical to those in the first embodiment are denoted by the same reference numerals.

[0101] (Metal pattern) Figure 13 is a partially enlarged view of the metal pattern MP according to the fourth embodiment. As shown in Figure 13, the metal pattern MP according to this disclosure comprises a sensor section 100 and a metal member 300. The specific configuration of the sensor section 100 (touch sensor) is the same as that of the sensor section 100 (touch sensor) of the first embodiment described above, so a description is omitted. The sensor section 100 has a first electrode 11, a second electrode 12, and a third electrode 13. The metal member 300 may also be formed of a mesh-like metal fine wire. Furthermore, the metal member 300 may have functions such as an antenna or a heater.

[0102] Furthermore, it is believed that the same problems as those of the antenna 200 in the first to third embodiments will arise if the antenna 200 in the fourth embodiment is replaced with a metal member 300.

[0103] (capacitive coupling) As described later, the metal member 300 overlaps with the first electrode 11 in a top view, forming a capacitance C2 between the metal member 300 and the first electrode 11 (see Figure 4). In addition, a capacitance C3 is formed between the user's fingers and the metal member 300. That is, capacitance C2 and capacitance C3 are connected in series. In other words, the metal member 300 and the first electrode 11 are capacitively coupled.

[0104] Furthermore, when the metal member 300 overlaps with the second electrode 12 in a top view, a capacitance C4 is formed between the metal member 300 and the second electrode 12. In other words, capacitance C4 and capacitance C3 are connected in series. To put it another way, the metal member 300 and the second electrode 12 are capacitively coupled.

[0105] From the above, if the width of the metal member 300 is wide and, when viewed from above, the metal member 300 overlaps both the first electrode 11 and the second electrode 12, then the first electrode 11 and the second electrode 12 will be pseudo-capacitively coupled. Because the first electrode 11 and the second electrode 12 are pseudo-capacitively coupled, even if only the first electrode 11 is touched, the capacitance of both the first electrode 11 and the second electrode 12 will change. Therefore, there is a risk that the sensor unit 100 (touch sensor) may malfunction.

[0106] (Metal components) Similar to the antenna 200 according to the first to third embodiments, the metal member 300 is provided on top of the first electrode 11, the second electrode 12, and the third electrode 13. As shown in Figure 13, the metal member 300 extends along a second direction D2 perpendicular to the first direction D1. The metal member 300 overlaps with the first electrode 11 in a top view. The metal member 300 does not overlap with the second electrode 12 in a top view. Furthermore, the metal member 300 does not overlap with the third electrode 13 in a top view.

[0107] As shown in Figure 13, the length L4 of the metal member 300 along the first direction D1 is shorter than the length L2 between the second electrode 12 and the third electrode 13 along the first direction D1. The length L5 of the metal member 300 along the second direction D2, which is perpendicular to the first direction D1, is shorter than the length L2 between the second electrode 12 and the third electrode 13 along the first direction D1.

[0108] As shown in Figure 13, the length L5 of the metal member 300 according to this disclosure along the second direction D2 is shorter than the length L2 along the first direction D1 between the second electrode 12 and the third electrode 13. Also, the metal member 300 overlaps with the first electrode 11 when viewed from above. The metal member 300 does not overlap with the second electrode 12 when viewed from above.

[0109] Therefore, even if the metal member 300 and the first electrode 11 are capacitively coupled, the metal member 300 and the second electrode 12 will not be capacitively coupled. This prevents pseudo-capacitive coupling between the first electrode 11 and the second electrode 12. Thus, malfunctions of the sensor unit 100 (touch sensor) can be prevented.

[0110] [summary] As a first disclosure, the antenna unit AU1 comprises an antenna 200 having a first electrode 11, a second electrode 12 located adjacent to the first electrode 11 in a first direction D1, a third electrode 13 located adjacent to the first electrode 11 in the opposite direction to the first direction D1, and a first radiating portion 211 provided above the first electrode 11 and extending in a second direction D2 perpendicular to the first direction D1. The first radiating portion 211 overlaps with the first electrode 11 in a top view. The first radiating portion 211 does not overlap with the second electrode 12 in a top view. The first radiating portion 211 does not overlap with the third electrode 13 in a top view. The length L1 of the first radiating portion 211 along the first direction D1 is shorter than the length L2 between the second electrode 12 and the third electrode 13.

[0111] In the first disclosure, the length L1 of the first radiating portion 211 along the first direction D1 is shorter than the length L2 of the distance between the second electrode 12 and the third electrode 13 along the first direction D1. Also, the first radiating portion 211 overlaps with the first electrode 11 when viewed from above. The first radiating portion 211 does not overlap with the second electrode 12 when viewed from above. With this configuration, even if the first radiating portion 211 and the first electrode 11 are capacitively coupled, the first radiating portion 211 and the second electrode 12 are not capacitively coupled. This prevents pseudo-capacitive coupling between the first electrode 11 and the second electrode 12. Therefore, malfunctions of the sensor portion 100 (touch sensor) can be prevented.

[0112] Furthermore, since the first electrode 11 has a portion that does not overlap with the first radiating portion 211 when viewed from above, it becomes possible to exchange electric field lines between the first electrode 11 and the user's fingers. Therefore, the sensor portion 100 (touch sensor) can be operated normally in the antenna unit.

[0113] As a second disclosure, the length L1 of the first radiating portion 211 along the first direction D1 is shorter than the length L3 of the first electrode 11 along the first direction D1.

[0114] In the second disclosure, the first radiating portion 211 does not obstruct the curved electric field lines. Also, the distance between the first radiating portion 211 and the second electrode 12 can be increased compared to the case where the first radiating portion 211 overlaps with the first side 11a in a top view. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the second electrode 12 can be reduced. Also, the distance between the first radiating portion 211 and the third electrode 13 can be increased compared to the case where the first radiating portion 211 overlaps with the second side 11b in a top view. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the third electrode 13 can be reduced. From the above, a reduction in the sensitivity of the sensor portion 100 (touch sensor) can be suppressed.

[0115] As a third disclosure, the first electrode 11 has a first side 11a extending along a second direction D2 and a second side 11b opposite the first side 11a in the first direction D1. The first side 11a does not overlap with the first radiating portion 211 in a top view. The second side 11b does not overlap with the first radiating portion 211 in a top view.

[0116] In the third disclosure, the first radiating portion 211 does not obstruct the curved electric field lines. Also, the distance between the first radiating portion 211 and the second electrode 12 can be increased compared to the case where the first radiating portion 211 overlaps with the first side 11a in a top view. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the second electrode 12 can be reduced. Also, the distance between the first radiating portion 211 and the third electrode 13 can be increased compared to the case where the first radiating portion 211 overlaps with the second side 11b in a top view. Therefore, the possibility of capacitive coupling between the first radiating portion 211 and the third electrode 13 can be reduced. From the above, a reduction in the sensitivity of the sensor portion 100 (touch sensor) can be suppressed.

[0117] As a fourth disclosure, the first electrode 11 has a first side 11a extending along a second direction D2 and a second side 11b opposite the first side 11a in the second direction D2. The first side 11a overlaps with the first radiating portion 211 in a top view. The second side 11b does not overlap with the first radiating portion 211 in a top view.

[0118] In the fourth disclosure, the area overlapping with the first radiating portion 211 near the center of the first electrode 11 is narrowed. That is, linear electric field lines are less likely to be obstructed. Therefore, the exchange of electric field lines between the sensor electrode S and the user's fingers can be performed quickly.

[0119] As a fifth disclosure, the antenna unit AU1 further comprises a fourth electrode 14 located adjacent to the first electrode 11 in the second direction D2. The first radiating portion 211 does not overlap with the fourth electrode 14 in a top view.

[0120] In the fifth disclosure, even when the first radiating portion 211 and the first electrode 11 are capacitively coupled, the first radiating portion 211 and the fourth electrode 14 are not capacitively coupled. This configuration prevents pseudo-capacitive coupling between the first electrode 11 and the fourth electrode 14. Therefore, malfunctions of the sensor portion 100 (touch sensor) can be prevented.

[0121] As a sixth disclosure, the antenna 200 further has a feed point 211a that feeds power to the first radiating section 211 (first radiating element section). The feed point 211a is located in the opposite direction to the second direction D2 of the first electrode 11.

[0122] In the sixth disclosure, the power supply point 211a is positioned away from the first electrode 11. Therefore, the first electrode 11 can be made less susceptible to the influence of the electric field generated from the power supply point 211a. Thus, malfunctions of the sensor unit 100 (touch sensor) can be prevented.

[0123] As a seventh disclosure, the antenna 200 further includes a first branch electrode portion 213 located in a first direction D1 of the first radiating portion 211, and a second branch electrode portion 214 located in the direction opposite to the first direction D1 of the first radiating portion 211.

[0124] In the seventh disclosure, an electric field is generated between each of the first and second radiating portions 211, 212 and each of the first and second branching electrode portions 213, 214 in a direction along the plane of the upper surface 120a of the second substrate 120 (i.e., the in-plane direction of the plane consisting of the first direction D1 and the second direction D2). Therefore, the electric field does not interfere with the sensor electrode S. This ensures the antenna characteristics of the antenna 200.

[0125] As the eighth disclosure, the antenna 200 further has a second radiating portion 212 extending from the first branch electrode portion 213 (first branch portion) in a second direction D2. The length of the second radiating portion 212 is shorter than the length of the first radiating portion 211.

[0126] In the eighth disclosure, by providing a second radiating unit 212, it is possible to respond to radio waves in a different frequency band than the first radiating unit 211.

[0127] As the ninth disclosure, the antenna 200 further includes an impedance matching element 215 that connects the second branch electrode section 214 (second branch section) and the first radiating section 211.

[0128] In the ninth disclosure, impedance matching in the antenna 200 can be adjusted by providing an impedance matching element 215.

[0129] As the tenth disclosure, the antenna 200 includes a wiring pattern 15 formed by a plurality of fine metal wires.

[0130] In the tenth disclosure, the first radiating portion 211 is formed of a mesh of fine metal wires. This configuration makes it easier for electric field lines to pass through the mesh-like openings. Therefore, a decrease in the sensitivity of the sensor portion 100 (touch sensor) can be suppressed.

[0131] As the eleventh disclosure, the antenna unit AU1 further comprises a dummy pattern 220 located in the same layer as the antenna 200, separated from the antenna 200, and formed by a plurality of fine metal wires. The unit structure of the dummy pattern 220 has the same shape as the unit structure of the wiring pattern 15.

[0132] The eleventh disclosure makes it possible to reduce the difference in appearance between the area where the first radiating section 211 is located and the area where the first radiating section 211 is not located. Therefore, it is possible to make it difficult for the user of the antenna unit AU1 to see the first radiating section 211.

[0133] As a twelfth disclosure, the dummy pattern 220 has a slit 18.

[0134] In the twelfth disclosure, the dummy pattern 220 is less likely to obstruct the electric field lines exchanged between the sensor electrode S (touch electrode) and the finger on the same plane as the second substrate 120. Therefore, the influence of the dummy pattern 220 on the performance of the touch operation can be reduced. In addition, the dummy pattern 220 is less likely to obstruct the electromagnetic waves radiated from the first radiating section 211 (first excitation element) on the same plane as the second substrate 120. Therefore, the influence of the dummy pattern 220 on the performance of the antenna 200 can be reduced.

[0135] As a thirteenth disclosure, the metal pattern MP comprises a first electrode 11, a second electrode 12 located adjacent to the first electrode 11 in a first direction D1, a third electrode 13 located adjacent to the first electrode 11 in a direction opposite to the first direction D1, and a metal member 300 provided on the upper layer of the first electrode 11. The metal member 300 overlaps with the first electrode 11 in a top view. The metal member 300 does not overlap with the second electrode 12 in a top view. The metal member 300 does not overlap with the third electrode 13 in a top view. The length L5 of the metal member 300 along the second direction D2 perpendicular to the first direction D1 is shorter than the length L2 between the second electrode 12 and the third electrode 13 along the first direction D1.

[0136] In the thirteenth disclosure, the length L5 of the metal member 300 in the second direction D2 is shorter than the length L2 in the first direction D1 between the second electrode 12 and the third electrode 13. Also, the metal member 300 overlaps with the first electrode 11 when viewed from above. The metal member 300 does not overlap with the second electrode 12 when viewed from above.

[0137] Therefore, even if the metal member 300 and the first electrode 11 are capacitively coupled, the metal member 300 and the second electrode 12 will not be capacitively coupled. This prevents pseudo-capacitive coupling between the first electrode 11 and the second electrode 12. Thus, malfunctions of the sensor unit 100 (touch sensor) can be prevented. [Industrial applicability]

[0138] As described above, this disclosure has industrial applications as an antenna unit and a metal pattern. [Explanation of Symbols]

[0139] 11: First electrode 11a: First side 11b: Second side 12: Second electrode 13: Third electrode 14: The fourth electrode 15: Wiring Pattern 18: Slit 200: Antenna 211:First radiation part 211a: Power supply point 212: Second Radiation Section 213: First branch electrode section 214: Second branch electrode section 215: Impedance matching element 220: Dummy Pattern 300: Metal components AU1~AU5: Antenna Unit D1: First direction D2: Second direction L1: Length along the first direction of the first radiating portion L2: Length between the second electrode and the third electrode L3: Length along the first direction of the first electrode. L4: Length along the first direction of the metal member L5: Length along the second direction of the metal member MP: Metal Pattern

Claims

1. The first electrode and A second electrode is positioned adjacent to the first electrode in the first direction, A third electrode is positioned adjacent to the first electrode in the direction opposite to the first direction, An antenna having a first radiating portion provided on the upper layer of the first electrode and extending in a second direction perpendicular to the first direction, Equipped with, The first radiating portion overlaps with the first electrode when viewed from above. The first radiating portion does not overlap with the second electrode when viewed from above. The first radiating portion does not overlap with the third electrode when viewed from above. The length of the first radiating portion along the first direction is shorter than the length between the second electrode and the third electrode. Antenna unit.

2. The length of the first radiating portion along the first direction is shorter than the length of the first electrode along the first direction. The antenna unit according to claim 1.

3. The first electrode is, A first side extending along the second direction, The first side and the second side facing the first direction, It has, The first side, when viewed from above, does not overlap with the first radial portion. The second side, when viewed from above, does not overlap with the first radial portion. The antenna unit according to claim 1 or 2.

4. The first electrode is, A first side extending along the second direction, The first side and the second side facing the second direction, It has, The first side, when viewed from above, overlaps with the first radial portion. The second side, when viewed from above, does not overlap with the first radial portion. The antenna unit according to claim 1 or 2.

5. The system further comprises a fourth electrode located adjacent to the first electrode in the second direction, The first radiating portion does not overlap with the fourth electrode when viewed from above. The antenna unit according to claims 1 to 4.

6. The antenna further has a feed point that supplies power to the first radiating section, The power supply point is located in the direction opposite to the second direction of the first electrode. The antenna unit according to claims 1 to 5.

7. The aforementioned antenna is The first branch electrode portion located in the first direction of the first radiating portion, A second branch electrode portion located in the opposite direction to the first direction of the first radiating portion, It further has, The antenna unit according to any one of claims 1 to 6.

8. The antenna further has a second radiating portion extending from the first branch electrode portion in the second direction, The length of the second radial portion is shorter than the length of the first radial portion. The antenna unit according to claim 7.

9. The antenna further includes an impedance matching element connecting the second branch electrode section and the first radiating section. The antenna unit according to claims 7 and 8.

10. The antenna includes a wiring pattern formed by a plurality of thin metal wires. The antenna unit according to any one of claims 1 to 9.

11. The antenna is located on the same layer as the antenna, is separated from the antenna, and further comprises a dummy pattern formed by a plurality of thin metal wires, The unit structure of the dummy pattern has the same shape as the unit structure of the wiring pattern. The antenna unit according to claim 9.

12. The dummy pattern has a slit, The antenna unit according to claim 11.

13. The first electrode and A second electrode is located adjacent to the first electrode in the first direction, A third electrode is positioned adjacent to the first electrode in the direction opposite to the first direction, A metal member provided on the upper layer of the first electrode, Equipped with, The aforementioned metal member overlaps with the first electrode when viewed from above. The aforementioned metal member does not overlap with the second electrode when viewed from above. The aforementioned metal member does not overlap with the third electrode when viewed from above. The length of the metal member along the second direction perpendicular to the first direction is shorter than the length between the second electrode and the third electrode along the first direction. Metal pattern.

Images