Antenna device and electronic device

Abstract

This antenna apparatus comprises: a sensor including one or more sensor first electrodes, one or more sensor second electrodes, and a piezoelectric film; and an antenna including one or more antenna first electrodes and an antenna second electrode. The piezoelectric film has a piezoelectric-film first main surface and a piezoelectric-film second main surface, the piezoelectric-film first main surface and the piezoelectric-film second main surface being disposed in this order in a first direction. The one or more sensor first electrodes are provided on the piezoelectric-film first main surface. The one or more sensor second electrodes are provided on the piezoelectric-film second main surface. The one or more antenna first electrodes are provided on the piezoelectric-film first main surface. The one or more antenna first electrodes, when viewed in the first direction, do not overlap the one or more sensor first electrodes and the one or more sensor second electrodes.

Description

[Technical Field]

[0001] The present invention relates to an antenna device equipped with an antenna used for communication, and to an electronic device equipped with the antenna device. [Background technology]

[0002] Patent Document 1 describes a touch screen that includes an antenna pattern, column-directional wiring, row-directional wiring, and a transparent substrate. The antenna pattern is used for communication. The touch screen identifies the position on the transparent substrate that the user touches based on the capacitance generated between the column-directional wiring and the row-directional wiring. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-157421 Summary of the Invention [Problem to be solved by the invention]

[0004] In the field of touch screens having antennas used for communication as described in Patent Document 1, it is desired to make it easier to improve the communication performance of the antennas.

[0005] An object of the present invention is to provide an antenna device that can easily improve the communication performance of the antenna. [Means for solving the problem]

[0006] An antenna device according to an embodiment of the present invention includes: a sensor including one or more sensor first electrodes, one or more sensor second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes and antenna second electrodes; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the one or more sensor first electrodes are provided on a first main surface of the piezoelectric film; the one or more second sensor electrodes are provided on a second principal surface of the piezoelectric film; each of the one or more antenna first electrodes is provided on a first main surface of the piezoelectric film; Each of the one or more antenna first electrodes does not overlap with the one or more sensor first electrodes and the one or more sensor second electrodes when viewed in the first direction.

[0007] An antenna device according to an embodiment of the present invention includes: a sensor including a sensor first electrode, one or more second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes; a dielectric layer having dielectric properties; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the first sensor electrode is provided on a first main surface of the piezoelectric film, each of the one or more sensor second electrodes is provided on a second principal surface of the piezoelectric film; the second direction is opposite to the first direction, the dielectric layer is located closer to the second direction than the first sensor electrode, the dielectric layer has a dielectric layer first main surface and a dielectric layer second main surface arranged in this order in the first direction, Each of the one or more antenna first electrodes is provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer. [Effects of the Invention]

[0008] According to the antenna device according to one embodiment of the present invention, the communication performance of the antenna is likely to be improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an antenna device 1 according to the first embodiment. [Figure 2] FIG. 2 is a view of the antenna device 1 as viewed in the negative direction of the Z axis. [Figure 3] FIG. 3 is a view of the antenna device 1 as viewed in the positive direction of the Z axis. [Figure 4] FIG. 4 is a diagram showing the piezoelectric film 101. As shown in FIG. [Figure 5] FIG. 5 is an exploded perspective view showing an antenna device Ex according to a first comparative example. [Figure 6] FIG. 6 is a diagram showing an antenna device 1a according to a first modification of the antenna device 1. In FIG. [Figure 7] FIG. 7 is a diagram showing an antenna device 1b according to a second modification of the antenna device 1. In FIG. [Figure 8] FIG. 8 is an exploded perspective view showing an antenna device 1c according to the second embodiment. [Figure 9] FIG. 9 is a view of the antenna device 1c as viewed in the positive direction of the Z axis. [Figure 10] FIG. 10 is a diagram showing an electronic device EE1 equipped with the antenna device 1. As shown in FIG. [Figure 11] FIG. 11 is a diagram showing an electronic device EE1a according to a first modification of the electronic device EE1. DETAILED DESCRIPTION OF THE INVENTION

[0010] [First embodiment] The antenna device 1 according to the first embodiment will be described below with reference to the drawings. Fig. 1 is a perspective view showing the antenna device 1 according to the first embodiment. Fig. 2 is a view of the antenna device 1 as seen in the negative direction of the Z axis. Fig. 3 is a view of the antenna device 1 as seen in the positive direction of the Z axis. Fig. 4 is a view showing a piezoelectric film 101.

[0011] In this embodiment, directions are defined as follows. As shown in FIG. 1 , the direction in which one or more sensor first electrodes 100a-100d and the piezoelectric film 101 are arranged is defined as the Z-axis direction. The direction in which one or more sensor first electrodes 100a-100d and the piezoelectric film 101 are arranged in this order is defined as the negative Z-axis direction. The direction in which the piezoelectric film 101 and one or more sensor first electrodes 100a-100d are arranged in this order is defined as the positive Z-axis direction. The direction perpendicular to the Z-axis direction is defined as the X-axis direction. The direction perpendicular to the Z-axis and X-axis directions is defined as the Y-axis direction. The first direction DIR1 coincides with the negative Z-axis direction. The second direction DIR2 coincides with the positive Z-axis direction. The second direction DIR2 is opposite to the first direction DIR1. The third direction DIR3 coincides with the positive X-axis direction. The third direction DIR3 is perpendicular to the first direction DIR1. The fourth direction DIR4 coincides with the positive direction of the Y-axis. The fourth direction DIR4 is perpendicular to the first direction DIR1 and the third direction DIR3. The fifth direction DIR5 coincides with the negative direction of the Y-axis. The fifth direction DIR5 is the opposite direction of the fourth direction DIR4.

[0012] The antenna device 1 is a device provided in an electronic device such as a smartphone, etc. The antenna device 1 includes a sensor 10, an antenna 20, and a wiring member 30, as shown in FIGS.

[0013] In this embodiment, the sensor 10 is specifically a piezoelectric sensor. As shown in FIGS. 1 to 3, the sensor 10 includes one or more first sensor electrodes, a piezoelectric film 101, one or more second sensor electrodes, and a detection circuit (not shown). In the example shown in FIGS. 1 to 3, the sensor 10 includes four first sensor electrodes 100a, 100b, 100c, and 100d. In the example shown in FIG. 3, the sensor 10 includes four second sensor electrodes 102a, 102b, 102c, and 102d.

[0014] 1 to 4, the piezoelectric film 101 has a rectangular shape with long sides extending along the X-axis and short sides extending along the Y-axis. As shown in FIGS. 1 to 3, the piezoelectric film 101 has a piezoelectric film first main surface SF1 and a piezoelectric film second main surface SF2. The piezoelectric film first main surface SF1 and the piezoelectric film second main surface SF2 are aligned in this order in the negative direction of the Z-axis (first direction DIR1).

[0015] The piezoelectric film 101 generates electric charges according to the amount of deformation of the piezoelectric film 101. For example, the polarity of the electric charges generated when the piezoelectric film 101 is stretched in the X-axis direction is opposite to the polarity of the electric charges generated when the piezoelectric film 101 is stretched in the Y-axis direction. Specifically, the piezoelectric film 101 is a film formed from a chiral polymer. An example of a chiral polymer is polylactic acid (PLA), particularly poly-L-lactic acid (PLLA). PLLA has a helical main chain structure. PLLA exhibits piezoelectricity due to molecular orientation when uniaxially stretched. The piezoelectric film 101 has a piezoelectric constant of d14. As shown in FIG. 4, the uniaxial stretching direction OD of the piezoelectric film 101 forms an angle of 45 degrees with respect to the X-axis direction and the Y-axis direction. This 45 degrees includes, for example, an angle of approximately 45 degrees ±10 degrees. As a result, the piezoelectric film 101 generates electric charges when the piezoelectric film 101 is stretched in the X-axis direction or the Y-axis direction. For example, when the piezoelectric film 101 is stretched in the X-axis direction, it generates a positive charge. When the piezoelectric film 101 is stretched in the Y-axis direction, it generates a negative charge. The magnitude of the charge depends on the differential value of the deformation of the piezoelectric film 101 due to stretching or compression.

[0016] In this embodiment, the sensor first electrode 100a is a reference electrode connected to a reference potential. For example, the sensor first electrode 100a is connected to a ground potential. As shown in FIGS. 1 and 2, the sensor first electrode 100a is provided on the first principal surface SF1 of the piezoelectric film. Specifically, the sensor first electrode 100a is provided on an end of the first principal surface SF1 of the piezoelectric film in the negative direction of the X axis and on an end of the first principal surface SF1 of the piezoelectric film in the positive direction of the Y axis. The sensor first electrode 100a is fixed to the first principal surface SF1 of the piezoelectric film with an adhesive (not shown), such as OCA. The size of the sensor first electrode 100a is smaller than the size of the piezoelectric film 101. The length of the sensor first electrode 100a in the X axis direction is shorter than the length of the piezoelectric film 101 in the X axis direction. The length of the sensor first electrode 100a in the Y axis direction is shorter than the length of the piezoelectric film 101 in the Y axis direction.

[0017] 1 and 2, the sensor first electrode 100b is provided at an end of the first principal surface SF1 of the piezoelectric film in the negative X-axis direction and at an end of the first principal surface SF1 of the piezoelectric film in the negative Y-axis direction. The other configuration of the sensor first electrode 100b is the same as that of the sensor first electrode 100a, and therefore a description thereof will be omitted.

[0018] 1 and 2, the first sensor electrode 100c is provided at an end of the first principal surface SF1 of the piezoelectric film in the positive direction of the X axis and at an end of the first principal surface SF1 of the piezoelectric film in the negative direction of the Y axis. The other configuration of the first sensor electrode 100c is the same as that of the first sensor electrode 100a, and therefore a description thereof will be omitted.

[0019] 1 and 2, the first sensor electrode 100d is provided at an end of the first principal surface SF1 of the piezoelectric film in the positive direction of the X axis and at an end of the first principal surface SF1 of the piezoelectric film in the positive direction of the Y axis. The other configuration of the first sensor electrode 100d is the same as that of the first sensor electrode 100a, and therefore a description thereof will be omitted.

[0020] In this embodiment, the sensor second electrode 102a is a signal electrode. As shown in FIG. 3, the sensor second electrode 102a is provided on the second principal surface SF2 of the piezoelectric film. Specifically, the sensor second electrode 102a is provided on an end of the second principal surface SF2 of the piezoelectric film in the negative direction of the X axis and on an end of the second principal surface SF2 of the piezoelectric film in the positive direction of the Y axis. The sensor second electrode 102a is fixed to the second principal surface SF2 of the piezoelectric film with an adhesive (not shown) such as OCA. The sensor second electrode 102a overlaps with the sensor first electrode 100a when viewed in the Z axis direction. The size of the sensor second electrode 102a is approximately the same as the size of the sensor first electrode 100a.

[0021] The second sensor electrode 102b is provided at an end of the second principal surface SF2 of the piezoelectric film in the negative X-axis direction and at an end of the second principal surface SF2 of the piezoelectric film in the negative Y-axis direction. The second sensor electrode 102b overlaps with the first sensor electrode 100b when viewed in the Z-axis direction. The other configuration of the second sensor electrode 102b is the same as that of the second sensor electrode 102a, so a description thereof will be omitted.

[0022] The second sensor electrode 102c is provided at an end of the second principal surface SF2 of the piezoelectric film in the positive direction of the X axis and at an end in the negative direction of the Y axis. The second sensor electrode 102c overlaps with the first sensor electrode 100c when viewed in the Z axis direction. The other configuration of the second sensor electrode 102c is the same as that of the second sensor electrode 102a, so a description thereof will be omitted.

[0023] The second sensor electrode 102d is provided at an end of the second principal surface SF2 of the piezoelectric film in the positive direction of the X axis and at an end of the second principal surface SF2 in the positive direction of the Y axis. The second sensor electrode 102d overlaps with the first sensor electrode 100d when viewed in the Z axis direction. The other configuration of the second sensor electrode 102d is the same as that of the second sensor electrode 102a, so a description thereof will be omitted.

[0024] With the above configuration, the sensor 10 outputs a first signal corresponding to the deformation of the sensor 10. The sensor 10 outputs the first signal based on the potential difference between one or more of the first sensor electrodes 100a-100d and one or more of the second sensor electrodes 102a-102d.

[0025] The antenna 20 transmits and receives signals to and from a communication device such as a smartphone. In this embodiment, the antenna 20 functions as, for example, a patch antenna. As shown in FIGS. 1 to 3 , the antenna 20 includes one or more antenna first electrodes 200 and antenna second electrodes 201.

[0026] In this embodiment, as shown in FIGS. 1 and 2, one or more antenna first electrodes 200 are provided on the piezoelectric film 101. Specifically, one or more antenna first electrodes 200 are provided on the first main surface SF1 of the piezoelectric film. The one or more antenna first electrodes 200 are arranged in a matrix on the first main surface SF1 of the piezoelectric film. Specifically, as shown in FIG. 1, a plurality of sets ST of a plurality of antenna first electrodes 200 are provided on the first main surface SF1 of the piezoelectric film, each set ST being arranged along the X axis. The plurality of sets are arranged at equal intervals along the Y axis. The one or more antenna first electrodes 200 are not in contact with each other. The one or more antenna first electrodes 200 do not overlap with each other when viewed in the Z axis direction. The one or more antenna first electrodes 200 do not overlap with one or more sensor first electrodes 100a to 100d when viewed in the first direction DIR1. Each of the one or more antenna first electrodes 200 does not overlap with each of the one or more sensor second electrodes 102a-102d when viewed in the Z-axis direction (first direction DIR1). As shown in FIG. 2, a high-frequency signal is input to and output from each of the one or more antenna first electrodes 200 via the wiring member 30. As a result, each of the one or more antenna first electrodes 200 emits or receives a second signal. Each of the one or more antenna first electrodes 200 emits the second signal, for example, in the positive direction of the Z-axis.

[0027] The antenna second electrode 201 is a reference electrode connected to a reference potential. For example, the antenna second electrode 201 is connected to a ground potential. As shown in FIG. 3 , in this embodiment, the antenna second electrode 201 is provided on the piezoelectric film 101. Specifically, the antenna second electrode 201 is provided on the second principal surface SF2 of the piezoelectric film. The antenna second electrode 201 is provided near the center of the second principal surface SF2 of the piezoelectric film. The antenna second electrode 201 is not provided at each of the four corners of the second principal surface SF2 of the piezoelectric film. Each of the four corners includes the corner formed by the long and short sides of the piezoelectric film 101 and its vicinity. As shown in FIGS. 2 and 3 , the antenna second electrode 201 overlaps with one or more antenna first electrodes 200 when viewed in the Z-axis direction. Each of the one or more antenna first electrodes 200 is located within the outer edge of the antenna second electrode 201 when viewed in the Z-axis direction. The antenna second electrode 201 does not overlap with the sensor first electrodes 100a to 100d when viewed in the Z-axis direction. The antenna second electrode 201 does not overlap with one or more of the sensor second electrodes 102a to 102d when viewed in the Z-axis direction.

[0028] (effect) The antenna device 1 improves the communication performance of the antenna 20. Below, with reference to the drawings, a comparison will be made between the antenna device Ex according to Comparative Example 1 and the antenna device 1. Fig. 5 is an exploded perspective view showing the antenna device Ex according to Comparative Example 1.

[0029] In the antenna device Ex, the sensor 10ex is located on the positive side of the Z axis relative to the antenna 20ex. For example, the antenna device Ex includes a dielectric layer 202ex on which one or more antenna first electrodes 200ex and antenna second electrodes 201ex are provided. The one or more sensor first electrodes 100ex, the piezoelectric film 101ex, and the one or more sensor second electrodes 102ex included in the sensor 10ex are located on the positive side of the Z axis relative to the dielectric layer 202ex, the one or more antenna first electrodes 200ex, and the antenna second electrodes 201ex. The other configuration of the antenna device Ex is the same as that of the antenna device 1, and therefore description thereof will be omitted.

[0030] In the antenna device Ex, the sensor 10ex is located on the positive side of the Z axis relative to the antenna 20ex. In this case, one or more sensor second electrodes 102ex connected to a reference potential are located on the positive side of the Z axis relative to one or more antenna first electrodes 200ex. Each of the one or more antenna first electrodes 200ex radiates a second signal, for example, in the positive direction of the Z axis. At this time, the second signal radiated in the positive direction of the Z axis may be blocked by one or more sensor second electrodes 102ex located on the positive side of the Z axis relative to one or more antenna first electrodes 200ex. Therefore, in the antenna device Ex, there is a risk that the communication performance of the antenna 20ex may be reduced.

[0031] On the other hand, in the antenna device 1, one or more antenna first electrodes 200 and one or more sensor first electrodes 100a-100d are provided on the first principal surface SF1 of the piezoelectric film. The one or more antenna first electrodes 200 do not overlap with one or more sensor first electrodes 100a-100d when viewed in the first direction DIR1. Furthermore, one or more sensor second electrodes 102a-102d are provided on the second principal surface SF2 of the piezoelectric film. In the above configuration, for example, when each of the one or more antenna first electrodes 200 radiates a second signal in the positive direction of the Z axis, the second signal radiated in the positive direction of the Z axis is not blocked by the one or more sensor first electrodes 100a-100d or the one or more sensor second electrodes 102a-102d. This makes it difficult for the communication performance of the antenna 20 to deteriorate. Therefore, the antenna device 1 makes it easy to improve the communication performance of the antenna 20.

[0032] Similarly, in the antenna device 1, when each of the one or more antenna first electrodes 200 receives a second signal, the second signal is not blocked by the one or more sensor first electrodes 100a-100d or the one or more sensor second electrodes 102a-102d. This makes it difficult for the communication performance of the antenna 20 to deteriorate. Therefore, according to the antenna device 1, the communication performance of the antenna 20 is likely to be improved.

[0033] In the antenna device 1, one or more sensor first electrodes 100a-100d, one or more sensor second electrodes 102a-102d, one or more antenna first electrodes 200, and one or more antenna second electrodes 201 are all provided on the piezoelectric film 101. In this case, the thickness of the antenna device 1 is thinner than that of the antenna device Ex that includes both a layer related to the sensor 10ex and a layer related to the antenna 20ex. Therefore, the antenna device 1 can be easily made low-profile.

[0034] In the antenna device 1, one or more antenna first electrodes 200 are provided on the first principal surface SF1 of the piezoelectric film. The antenna second electrode 201 is provided on the second principal surface SF2 of the piezoelectric film. Therefore, when each of the one or more antenna first electrodes 200 radiates a second signal in the positive direction of the Z axis, the second signal radiated in the positive direction of the Z axis is unlikely to be blocked by the antenna second electrode 201. Therefore, the communication performance of the antenna 20 is unlikely to deteriorate.

[0035] The antenna device 1 is provided in an electronic device such as a smartphone. The electronic device includes, for example, an elastic member located on the positive side of the Z axis relative to the sensor 10. At this time, a user, for example, presses the elastic member in the negative direction of the Z axis. As a result, a force in the negative direction of the Z axis is applied to the sensor 10 via the elastic member. This force deforms the sensor 10 so that it protrudes in the negative direction of the Z axis. The sensor 10 outputs a first signal corresponding to the deformation of the sensor 10. Here, in the antenna device 1, one or more sensor first electrodes 100a-100d, which serve as reference electrodes, are provided on the first main surface SF1 of the piezoelectric film. One or more sensor second electrodes 102a-102d, which serve as signal electrodes, are provided on the second main surface SF2 of the piezoelectric film. In this case, in the antenna device 1, one or more sensor first electrodes 100a-100d are located on the positive side of the Z axis relative to one or more sensor second electrodes 102a-102d. Therefore, in the electronic device, the one or more sensor first electrodes 100a-100d are each arranged closer to the elastic member than the one or more sensor second electrodes 102a-102d. In this case, the one or more sensor second electrodes 102a-102d are less susceptible to the influence of noise generated when a user touches the elastic member, due to the one or more sensor first electrodes 100a-100d. Therefore, the sensor 10 is less likely to malfunction.

[0036] [Variation 1 of Antenna Device 1] Hereinafter, an antenna device 1a according to a first modification of the antenna device 1 will be described with reference to the drawings. Fig. 6 is a diagram showing an antenna device 1a according to the first modification of the antenna device 1.

[0037] The antenna device 1a differs from the antenna device 1 in that it includes multiple types of antenna electrodes. For example, in the antenna device 1a, the one or more antenna first electrodes 200 include one or more first radiation electrodes 200a, one or more second radiation electrodes 200b, one or more third radiation electrodes 200c, one or more fourth radiation electrodes 200d, and one or more fifth radiation electrodes 200e. The frequencies of the second signals output by the one or more first radiation electrodes 200a to the one or more fifth radiation electrodes 200e are different from one another. For example, the frequency of the second signal output by the one or more first radiation electrodes 200a is different from the frequency of the second signal output by the one or more second radiation electrodes 200b.

[0038] Similarly, the frequency of the second signal output from the one or more first radiation electrodes 200a is different from the frequency of the second signal output from the one or more third radiation electrodes 200c. The frequency of the second signal output from the one or more first radiation electrodes 200a is different from the frequency of the second signal output from the one or more fourth radiation electrodes 200d. The frequency of the second signal output from the one or more first radiation electrodes 200a is different from the frequency of the second signal output from the one or more fifth radiation electrodes 200e. The same applies to the one or more second radiation electrodes 200b, one or more third radiation electrodes 200c, one or more fourth radiation electrodes 200d, and one or more fifth radiation electrodes 200e.

[0039] In this modification, the first principal surface SF1 of the piezoelectric film includes four regions. Specifically, the first principal surface SF1 of the piezoelectric film includes a first region Ar1, a second region Ar2, a third region Ar3, and a fourth region Ar4. More specifically, as shown in FIG. 6, a first straight line SL1 extending in the third direction DIR3 is defined. In this modification, the first straight line SL1 overlaps the center of the piezoelectric film 101 when viewed in the Z-axis direction. Also, a second straight line SL2 extending in the fourth direction DIR4 is defined. In this modification, the second straight line SL2 overlaps the center of the piezoelectric film 101 when viewed in the Z-axis direction. In this case, when viewed in the first direction DIR1, the first region Ar1 and the fourth region Ar4 are located on the positive side of the Y-axis (the fourth direction DIR4 side) of the first straight line SL1. When viewed in the first direction DIR1, the second region Ar2 and the third region Ar3 are located on the negative side of the Y-axis (the fifth direction DIR5 side) of the first straight line SL1. When viewed in the first direction DIR1, the first region Ar1 and the second region Ar2 are located on the negative side of the X-axis from the second straight line SL2, and the third region Ar3 and the fourth region Ar4 are located on the positive side of the X-axis from the second straight line SL2.

[0040] In each of the first region Ar1, the second region Ar2, the third region Ar3, and the fourth region Ar4, at least one first radiation electrode 200a, at least one second radiation electrode 200b, at least one third radiation electrode 200c, at least one fourth radiation electrode 200d, and at least one fifth radiation electrode 200e are arranged.

[0041] Furthermore, the antenna device 1a differs from the antenna device 1 in that it further includes an arithmetic circuit (not shown). The arithmetic circuit is electrically connected to the sensor 10 via a wiring member (not shown). The arithmetic circuit receives a first signal from the sensor 10. Based on the first signal, the arithmetic circuit determines which of the first area Ar1 to the fourth area Ar4 has been deformed.

[0042] The arithmetic circuit is also electrically connected to the antenna 20 via a wiring member (not shown). The arithmetic circuit receives a second signal from the antenna 20. In this modification, the arithmetic circuit determines whether the first region Ar1, the second region Ar2, the third region Ar3, or the fourth region Ar4 has deformed based on the first signal and the second signal. For example, the arithmetic circuit determines which of the first region Ar1 to the fourth region Ar4 has deformed based on whether the sensitivity of the antenna 20 exceeds a predetermined threshold.

[0043] When the arithmetic circuit determines that the first region Ar1 has been deformed, one or more of the one or more antenna first electrodes 200 located in the first region Ar1 stop emitting or receiving the second signal. For example, a circuit (not shown), such as a tuning circuit, provided in the antenna device 1a inputs and outputs high-frequency signals to one or more antenna first electrodes 200. The circuit stops inputting and outputting high-frequency signals to one or more antenna first electrodes 200 located in the first region Ar1. When the sensitivity of one or more antenna first electrodes 200 located in the first region Ar1 falls below a predetermined threshold (when the antenna sensitivity returns), the one or more antenna first electrodes 200 located in the one or more first regions Ar1 resume emitting or receiving the second signal.

[0044] At this time, the arithmetic circuit identifies the region in which one or more antenna first electrodes 200 that have stopped emitting or receiving the second signal are located. The arithmetic circuit then determines that the identified region is deformed. For example, the arithmetic circuit identifies that one or more antenna first electrodes 200 located in the first region Ar1 have stopped emitting or receiving the second signal. In this case, the arithmetic circuit determines that the vicinity of the first region Ar1 is deformed. As such, in this modification, the arithmetic circuit identifies the position where the sensor 10 has deformed based on both the first signal and the second signal. Therefore, the arithmetic circuit in the antenna device 1a has improved position identification accuracy compared to when the arithmetic circuit identifies the position where the sensor has deformed based only on the first signal.

[0045] Similarly, when the arithmetic circuit determines that the second region Ar2 has been deformed, the one or more antenna first electrodes 200 located in the second region Ar2 among the one or more antenna first electrodes 200 stop emitting or receiving the second signal. The arithmetic circuit also executes a similar process when it determines that the third region Ar3 or the fourth region Ar4 has been deformed.

[0046] [Variation 2 of Antenna Device 1] Hereinafter, an antenna device 1b according to a second modification of the antenna device 1 will be described with reference to the drawings. Fig. 7 is a diagram showing an antenna device 1b according to a second modification of the antenna device 1. In Fig. 7, one or more second sensor electrodes 102a to 102d are seen through.

[0047] Antenna device 1b differs from antenna device 1 in that sensor 10 includes one or more first sensor electrodes 100a2-100d2 instead of one or more first sensor electrodes 100a-100d.

[0048] In this modification, the size of the sensor first electrode 100a2 is larger than the size of the sensor second electrode 102a (see FIG. 7). The sensor second electrode 102a is located within the outer edge of the sensor first electrode 100a2 when viewed in the Z-axis direction (first direction DIR1). In this case, the shortest distance between the sensor first electrode 100a2 and one or more antenna first electrodes 200 is shorter than the shortest distance between the sensor first electrode 100a2 and one or more sensor second electrodes 102a to 102d. Specifically, in the example shown in FIG. 7, the one or more antenna first electrodes 200 include the antenna first electrode 2000. When viewed in the Z-axis direction, the antenna first electrode 2000 is closest to the sensor first electrode 100a2 among the one or more antenna first electrodes 200. The sensor second electrode 102a is closest to the sensor first electrode 100a2 among the one or more sensor second electrodes 102a to 102d. In this case, the distance between the first sensor electrode 100a2 and the first antenna electrode 2000 is shorter than the distance between the first sensor electrode 100a2 and the second sensor electrode 102a. With the above configuration, the second sensor electrode 102a is less susceptible to noise. As a result, the sensor 10 is less likely to malfunction.

[0049] The other configurations of the sensor first electrodes 100b2, 100c2, and 100d2 are the same as the configuration of the sensor first electrode 100a2, so description thereof will be omitted. In this modification, the sensor first electrodes 100b2, 100c2, and 100d2 are less susceptible to the influence of noise, similar to the sensor first electrode 100a2.

[0050] [Second embodiment] An antenna device 1c according to the second embodiment will be described below with reference to the drawings. Fig. 8 is an exploded perspective view showing the antenna device 1c according to the second embodiment. In Fig. 8, the wiring member 30 is omitted. Fig. 9 is a view of the antenna device 1c as seen in the positive direction of the Z axis.

[0051] As shown in Figures 8 and 9, antenna device 1c differs from antenna device 1 in that it includes a sensor 10c that is different from sensor 10, an antenna 20c that is different from antenna 20, and further includes a dielectric layer 40.

[0052] As shown in FIG. 8, the sensor 10c includes a sensor first electrode 103 instead of one or more sensor first electrodes 100a-100d. The sensor first electrode 103 is connected to a reference potential. The sensor first electrode 103 is provided on the first main surface SF1 of the piezoelectric film. For example, the sensor first electrode 103 covers substantially the entire first main surface SF1 of the piezoelectric film. The sensor first electrode 103 overlaps one or more sensor second electrodes 102a-102d when viewed in the Z-axis direction. The one or more sensor second electrodes 102a-102d are located within the outer edge of the sensor first electrode 103 when viewed in the Z-axis direction. In this embodiment, the sensor 10c outputs a first signal based on the potential difference between the sensor first electrode 103 and one or more sensor second electrodes 102a-102d. The other configurations of the sensor 10c are the same as those of the sensor 10, and therefore, description thereof will be omitted.

[0053] As shown in FIG. 8, the dielectric layer 40 has a plate shape with long sides extending along the X-axis and short sides extending along the Y-axis. The dielectric layer 40 has a dielectric layer first main surface SF1c and a dielectric layer second main surface SF2c. The dielectric layer first main surface SF1c and the dielectric layer second main surface SF2c are arranged in this order in the negative direction of the Z-axis (first direction DIR1). The dielectric layer 40 is located on the positive side of the Z-axis (second direction DIR2 side) with respect to the first sensor electrode 103. The dielectric layer 40 has dielectric properties. The dielectric layer 40 includes, for example, an ITO layer and a PET layer.

[0054] Antenna 20c differs from antenna 20 in that it does not include antenna second electrode 201 connected to a reference potential. In this embodiment, sensor first electrode 103 functions as a reference electrode in antenna 20c, which is a patch antenna. As shown in FIG. 8, in antenna 20c, one or more antenna first electrodes 200 are provided on the first main surface SF1c of the dielectric layer. The one or more antenna first electrodes 200 overlap with sensor first electrode 103 when viewed in the Z-axis direction. The one or more antenna first electrodes 200 are located within the outer edge of sensor first electrode 103 when viewed in the Z-axis direction. In this embodiment, sensor first electrode 103 functions as a ground in antenna 20c, which is a patch antenna.

[0055] (effect) According to the antenna device 1c, the communication performance of the antenna 20c is likely to be improved. Specifically, in the antenna 20c, one or more antenna first electrodes 200 are provided on the first main surface SF1c of the dielectric layer. In this case, in the antenna device 1c, the one or more antenna first electrodes 200 are located on the positive side of the Z axis relative to the sensor first electrode 103, which is the reference electrode. Therefore, similar to the antenna device 1, when each of the one or more antenna first electrodes 200 radiates a second signal in the positive direction of the Z axis, the second signal is unlikely to be blocked by the sensor first electrode 103. This makes it possible to improve the communication performance of the antenna 20c.

[0056] In the antenna device 1c, one or more antenna first electrodes 200 are provided on the first main surface SF1c of the dielectric layer. The first sensor electrode 103 and one or more sensor second electrodes 102a-102d are not provided on the first main surface SF1c of the dielectric layer. Therefore, in the antenna device 1c, one or more antenna first electrodes 200 can be provided on the entire surface of the first main surface SF1c of the dielectric layer. This tends to increase the range over which the second signal is emitted or received by the antenna 20c. As a result, the communication performance of the antenna 20c tends to improve.

[0057] In the antenna device 1c, one or more antenna first electrodes 200 are not provided on the piezoelectric film 101. This improves the degree of freedom in arranging the sensor first electrode 103 and one or more sensor second electrodes 102a-102d on the piezoelectric film 101. Therefore, for example, the arrangement of the sensor first electrode 103 and one or more sensor second electrodes 102a-102d can be changed in response to changes in the shape of the antenna device 1c. Therefore, according to the antenna device 1c, the antenna device 1c can more easily accommodate changes in the shape of the antenna device 1c.

[0058] In the antenna device 1c, the sensor first electrode 103 functions as the ground of the antenna 20c. In addition, the sensor first electrode 103 functions as the ground of the sensor 10c. That is, in this embodiment, the ground of the sensor 10c and the ground of the antenna 20c are common to each other. In this case, the thickness of the antenna device 1c is likely to be thinner than in an antenna device in which the sensor ground and the antenna ground are not common to each other (in which the sensor ground and the antenna ground are provided separately). As a result, the antenna device 1c makes it easier to reduce the height of the antenna device 1c.

[0059] [Electronic equipment EE1] An example of an electronic device EE1 equipped with the antenna device 1 will be described below with reference to the drawings. Fig. 10 is a diagram showing an electronic device EE1 equipped with the antenna device 1.

[0060] 10, the electronic device EE1 includes an antenna device 1, a protective film layer 50, and a display 60. The electronic device EE1 is, for example, a smartphone.

[0061] The protective film layer 50 protects the antenna device 1 and the display 60. As shown in Fig. 10, the protective film layer 50 is located on the positive side of the Z axis (the second direction DIR2 side) of the one or more sensor first electrodes 100a-100d and the one or more antenna first electrodes 200. The protective film layer 50 covers the one or more sensor first electrodes 100a-100d, the piezoelectric film 101, and the one or more antenna first electrodes 200. The protective film layer 50 is made of a material such as glass.

[0062] A user operates the electronic device EE1 by pressing the protective film layer 50. At this time, the sensor 10 outputs a first signal based on the user's operation. Specifically, the user presses the protective film layer 50, for example, in the negative direction of the Z axis. This applies a force to the sensor 10 in the negative direction of the Z axis. This force causes the sensor 10 to deform so as to protrude in the negative direction of the Z axis. The sensor 10 outputs a first signal corresponding to the deformation of the sensor 10.

[0063] The display 60 is an organic EL display, an inorganic EL display, or the like. As shown in FIG. 10 , the display 60 is located on the negative side of the Z axis relative to the antenna device 1. Specifically, the display 60 is located on the negative side of the Z axis (in the first direction DIR1) relative to one or more sensor second electrodes 102a to 102d. The display 60 is located on the negative side of the Z axis relative to the antenna second electrode 201. For example, a user views information displayed on the display 60 through the protective film layer 50, some components of the sensor 10, and some components of the antenna 20. The user presses the protective film layer 50 based on the information displayed on the display 60. For example, the user operates the electronic device EE1 by pressing a portion of the protective film layer 50 that overlaps with the display 60 when viewed in the Z axis direction.

[0064] (effect) In the electronic device EE1, the protective film layer 50 is located on the positive side of the Z axis relative to the one or more sensor first electrodes 100a-100d and the one or more antenna first electrodes 200. In this case, when a user performs an unintended operation, the protective film layer 50 tends to prevent deformation of the sensor 10. For example, when the protective film layer 50 is slightly deformed due to a user accidentally touching the protective film layer 50, the sensor 10 is less likely to deform. In other words, according to the electronic device EE1, when a user performs an unintended operation on the electronic device EE1, the sensor 10 is less likely to malfunction.

[0065] The one or more antenna first electrodes 200 radiate the second signal, for example, in the positive direction of the Z axis. Here, in the electronic device EE1, the display 60 is located on the negative side of the Z axis relative to the one or more sensor second electrodes 102a-102d. In this case, the second signal radiated from the one or more antenna first electrodes 200 is not blocked by the display 60. Therefore, the communication performance of the antenna 20 is less likely to deteriorate. Similarly, the display 60 does not block reception of the second signal by the one or more antenna first electrodes 200.

[0066] [Modification 1 of Electronic Device EE1] Hereinafter, an electronic device EE1a according to Modification 1 of the electronic device EE1 will be described with reference to the drawings. Fig. 11 is a diagram showing the electronic device EE1a according to Modification 1 of the electronic device EE1. Fig. 11 is a diagram showing the electronic device EE1a as viewed in the negative direction of the Z axis. In Fig. 11, the protective film layer 50 is omitted.

[0067] In the antenna device 1d in the electronic device EE1a, the arrangement of one or more antenna first electrodes 200 is different from the arrangement of one or more antenna first electrodes 200 in the electronic device EE1. Specifically, as shown in Fig. 11, the first main surface SF1 of the piezoelectric film includes a central region CeAr. When viewed in the Z-axis direction (first direction DIR1), the central region CeAr is surrounded by a plurality of straight lines connecting the centers of gravity of the four or more sensor first electrodes. All of the one or more antenna first electrodes 200 are located within the central region CeAr when viewed in the Z-axis direction (first direction DIR1).

[0068] 11, in the sensor 10 of the electronic device EE1a, a line SLab is defined connecting the center of gravity Ga of the sensor first electrode 100a and the center of gravity Gb of the sensor first electrode 100b. A line SLad is defined connecting the center of gravity Ga and the center of gravity Gd of the sensor first electrode 100d. A line SLbc is defined connecting the center of gravity Gb and the center of gravity Gc of the sensor first electrode 100c. A line SLcd is defined connecting the center of gravity Gc and the center of gravity Gd. In this case, the central region CeAr is a region on the first main surface SF1 of the piezoelectric film surrounded by the lines SLab, SLad, SLbc, and SLcd. All of the one or more antenna first electrodes 200 are located within the region surrounded by the lines SLab, SLad, SLbc, and SLcd when viewed in the Z-axis direction (first direction DIR1).

[0069] The electronic device EE1a also differs from the electronic device EE1a in that it includes a display 60a that is different in size from the display 60. The size of the display 60a is smaller than the size of the display 60. In this modification, the size of the display 60a is smaller than the size of the central region CeAr. The display 60a is located within the central region CeAr when viewed in the Z-axis direction (first direction). At this time, all of the one or more antenna first electrodes 200 are located within the outer edge of the display 60 when viewed in the Z-axis direction (first direction DIR1).

[0070] (effect) For example, a user operates the electronic device EE1a by pressing a portion of the protective film layer 50 that overlaps with the display 60a (hereinafter referred to as the operation unit) when viewed in the Z-axis direction. Here, the display 60a is located within the central region CeAr when viewed in the Z-axis direction (first direction). The central region CeAr of the piezoelectric film 101 has a larger amount of deformation than the outer peripheral edge portion of the piezoelectric film 101. Therefore, when a user presses the operation unit based on information displayed on the display 60a, the central region CeAr, which has a larger amount of deformation, deforms. In this case, the deformation of the piezoelectric film 101 is likely to be large. Therefore, the sensitivity of the sensor 10 is likely to be improved.

[0071] It is sufficient that all of the one or more antenna first electrodes 200 are located at least within the central region CeAr when viewed in the Z-axis direction (first direction DIR1). In this case, the piezoelectric film 101 is also easily deformed, so that the same effect can be obtained.

[0072] [Other variations] The antenna device according to the present invention is not limited to the antenna devices 1, 1a to 1d and the electronic devices EE1, EE1a, and can be modified within the scope of the invention. The configurations of the antenna devices 1, 1a to 1d and the electronic devices EE1, EE1a may be combined in any manner.

[0073] The X-axis, Y-axis, and Z-axis directions are defined for the purpose of explanation only, and therefore the X-axis, Y-axis, and Z-axis directions when the antenna devices 1, 1a to 1d are actually used do not necessarily have to match the X-axis, Y-axis, and Z-axis directions in each embodiment and each modified example.

[0074] The first direction DIR1 to the fifth direction DIR5 are defined for the purpose of explanation. Therefore, the first direction DIR1 to the fifth direction DIR5 when the antenna devices 1, 1a to 1d are actually used do not necessarily have to match the first direction DIR1 to the fifth direction DIR5 in each embodiment and each modified example.

[0075] The electronic device EE1 may include, instead of the antenna device 1, any of the antenna devices 1a to 1d.

[0076] In the antenna devices 1, 1a to 1d, a first signal is output by one or more first sensor electrodes 100a to 100d and one or more second sensor electrodes 102a to 102d provided on the piezoelectric film 101. In this case, for example, an arithmetic circuit receives the first signal. At this time, the arithmetic circuit performs a calculation based on the first signal to identify the position where the sensor 10 is deformed. In other words, the arithmetic circuit can identify the position where the user applied force to the sensor 10. Therefore, the antenna device 1 can identify the position where the user applied force to the sensor 10 even if it does not include a component such as a touch panel that identifies the position pressed by the user.

[0077] In the antenna device 1c, one or more antenna first electrodes 200 may be provided on the second main surface SF2c of the dielectric layer.

[0078] In the electronic device EE1a, all of the one or more antenna first electrodes 200 do not necessarily have to be located within the outer edge of the display 60a when viewed in the Z-axis direction. All of the one or more antenna first electrodes 200 only need to be located within the central region CeAr when viewed in the Z-axis direction. However, when the display 60a is located within the central region CeAr when viewed in the Z-axis direction (first direction), the piezoelectric film 101 becomes more likely to deform. Therefore, in the electronic device EE1a, it is preferable that the display 60a is located within the central region CeAr when viewed in the Z-axis direction (first direction) and that all of the one or more antenna first electrodes 200 are located within the display 60a when viewed in the Z-axis direction (first direction DIR1).

[0079] The antenna device 1a may include at least two types of antenna electrodes. For example, the one or more antenna first electrodes 200 may include a first radiation electrode 200a and a second radiation electrode 200b.

[0080] In the antenna device 1a, each of the first region Ar1 to the fourth region Ar4 may be defined by virtually dividing the first main surface SF1 of the piezoelectric film into a plurality of regions. Therefore, each of the first line SL1 and the second line SL2 may be a virtually defined line. Therefore, each of the first line SL1 and the second line SL2 does not need to overlap with the center of the piezoelectric film 101 when viewed in the Z-axis direction.

[0081] When the first principal surface SF1 of the piezoelectric film is virtually divided into a plurality of regions, the electrodes provided in each of the virtually divided regions (hereinafter referred to as a plurality of virtual regions) may be of the same type. For example, the first radiation electrode 200a may be provided in each of the plurality of virtual regions as a single type of electrode. In this case, the arithmetic circuit determines which of the plurality of virtual regions has been deformed. The first radiation electrode 200a provided in the deformed virtual region stops emitting or receiving signals.

[0082] The first principal surface SF1 of the piezoelectric film does not necessarily have to be virtually divided into four regions. The first principal surface SF1 of the piezoelectric film may, for example, be virtually divided into two regions. For example, the first principal surface SF1 of the piezoelectric film may be virtually divided into two regions: a first region Ar1 and a second region Ar2. In this case, the first region Ar1 is, for example, the entire region of the first principal surface SF1 of the piezoelectric film located on the negative side of the X-axis from the first straight line SL1. The second region is, for example, the entire region of the first principal surface SF1 of the piezoelectric film located on the positive side of the X-axis from the first straight line SL1.

[0083] In addition, when the first main surface SF1 of the piezoelectric film is, for example, virtually divided into two regions, the first radiation electrode 200a may be located in the first region Ar1, and the second radiation electrode 200b may be located in the second region Ar2.

[0084] In the antenna device 1a, the first main surface SF1 of the piezoelectric film does not necessarily have to be virtually divided into a plurality of regions. A single virtual region may be defined on the first main surface SF1 of the piezoelectric film.

[0085] In the antenna device 1a, it is preferable that each of the multiple types of antenna electrodes is arranged in two of the multiple virtual areas. For example, the antenna device 1a includes two types of antenna electrodes: a first radiation electrode 200a and a second radiation electrode 200b. In this case, it is preferable that the first radiation electrode 200a is arranged in two of the first to fourth areas Ar1 to Ar4, and the second radiation electrode 200b is arranged in two of the first to fourth areas Ar1 to Ar4. This allows the antenna electrode arranged in one of the first to fourth areas Ar1 to Ar4 (hereinafter referred to as the stop area) to stop emitting or receiving signals, while the antenna electrodes arranged in areas other than the stop area can still radiate or receive signals. It is more preferable that at least one of each of the multiple types of antenna electrodes is arranged in each of the multiple virtual areas.

[0086] The antenna device 1 communicates based on, for example, the Wi-Fi (registered trademark) standard. In this case, the frequency of the second signal radiated or received by each of the one or more antenna first electrodes 200 is, for example, 5 GHz. Meanwhile, the piezoelectric film 101 of the sensor 10 detects the first signal having a frequency of about several tens of Hz. Therefore, the second signal does not interfere with the first signal. Therefore, even when the extraction electrode of the antenna 20 and the extraction electrode of the sensor 10 are brought close to each other, the extraction electrode of the antenna 20 and the extraction electrode of the sensor 10 are unlikely to interfere with each other.

[0087] The sensor 10 may include five or more first sensor electrodes. The sensor 10 may include five or more second sensor electrodes.

[0088] The antenna 20 may include a plurality of second antenna electrodes 201.

[0089] The sensor 10 may include three or fewer sensor first electrodes. The sensor 10 may include three or fewer sensor second electrodes. However, in order to detect position, the sensor 10 preferably includes at least two sensor first electrodes and at least two sensor second electrodes. In this case, each of the two sensor first electrodes is disposed at a diagonal corner on the first main surface SF1 of the piezoelectric film, and each of the two sensor second electrodes is disposed at a diagonal corner on the second main surface SF2 of the piezoelectric film.

[0090] The antenna 20 may include 21 or more antenna first electrodes 200, or may include 19 or fewer antenna first electrodes 200.

[0091] The sizes of the one or more sensor first electrodes 100a-100d and the one or more sensor second electrodes 102a-102d are not limited to the examples of the one or more sensor first electrodes 100a-100d and the one or more sensor second electrodes 102a-102d shown in Figures 1 to 11. The sizes of the one or more sensor first electrodes 100a-100d and the one or more sensor second electrodes 102a-102d can be changed as appropriate depending on the application.

[0092] In the antenna 20c, one or more antenna first electrodes 200 may be provided on the second principal surface SF2c of the dielectric layer.

[0093] In the antenna device 1c, the sensor 10c includes an electrode (first sensor electrode 103) that functions as the ground of the patch antenna. However, the inclusive relationship shown above is not necessarily required. For example, in the antenna device 1c, the antenna 20c, instead of the sensor 10c, may include an electrode that functions as the ground of the patch antenna.

[0094] The uniaxial stretching direction OD of the piezoelectric film 101 does not necessarily have to form a 45-degree angle with the X-axis and Y-axis directions. For example, the uniaxial stretching direction OD may form a 0-degree angle with the X-axis and Y-axis directions. This makes it easier for the sensor 10 to output a signal corresponding to the deformation of the sensor 10 in the antenna devices 1, 1a to 1d in which the electrodes are provided at the corners of the piezoelectric film 101. In this case, the sensor 10 outputs a signal corresponding to the deformation caused by the sensor 10 being twisted.

[0095] The sensor first electrode 100a does not necessarily have to be formed on the first main surface SF1 of the piezoelectric film with an adhesive such as OCA. The sensor first electrode 100a may be formed by forming a transparent electrode made of ITO, PEDOT, or the like on the first main surface SF1 of the piezoelectric film. The same applies to the sensor first electrodes 100b, 100c, and 100d.

[0096] The second sensor electrode 102a does not necessarily have to be formed on the second main surface SF2 of the piezoelectric film with an adhesive such as OCA. The second sensor electrode 102a may be formed by forming a transparent electrode made of ITO, PEDOT, or the like on the second main surface SF2 of the piezoelectric film. The same applies to the second sensor electrodes 102b, 102c, and 102d.

[0097] The present invention has the following structure:

[0098] (1) a sensor including one or more sensor first electrodes, one or more sensor second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes and antenna second electrodes; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the one or more sensor first electrodes are provided on a first main surface of the piezoelectric film; the one or more second sensor electrodes are provided on a second principal surface of the piezoelectric film; each of the one or more antenna first electrodes is provided on a first main surface of the piezoelectric film; each of the one or more antenna first electrodes does not overlap with the one or more sensor first electrodes and the one or more sensor second electrodes when viewed in the first direction; Antenna device.

[0099] (2) the antenna second electrode is provided on a second main surface of the piezoelectric film; The antenna device described in (1).

[0100] (3) each of the one or more sensor first electrodes is a reference electrode connected to a reference potential; each of the one or more sensor second electrodes is a signal electrode; An antenna device according to (1) or (2).

[0101] (4) The antenna second electrode is a reference electrode connected to a reference potential. An antenna device according to any one of (1) to (3).

[0102] (5) each of the one or more sensor second electrodes is located within an outer edge of the one or more sensor first electrodes when viewed in the first direction; An antenna device according to any one of (1) to (4).

[0103] (6) a shortest distance between each of the one or more sensor first electrodes and the antenna first electrode is shorter than a shortest distance between each of the one or more sensor first electrodes and the one or more sensor second electrodes; (5) An antenna device according to the present invention.

[0104] (7) a sensor including a sensor first electrode, one or more second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes; a dielectric layer having dielectric properties; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the first sensor electrode is provided on a first main surface of the piezoelectric film, each of the one or more sensor second electrodes is provided on a second principal surface of the piezoelectric film; the second direction is opposite to the first direction, the dielectric layer is located closer to the second direction than the first sensor electrode, the dielectric layer has a first dielectric layer main surface and a second dielectric layer main surface aligned in the first direction, Each of the one or more antenna first electrodes is provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer. Antenna device.

[0105] (8) each of the one or more antenna first electrodes radiates or receives a second signal; An antenna device according to any one of (1) to (7).

[0106] (9) the one or more antenna first electrodes include a first radiation electrode and a second radiation electrode; a frequency of the second signal radiated or received by the first radiation electrode is different from a frequency of the second signal radiated or received by the second radiation electrode; The antenna device according to (8).

[0107] (10) The antenna device further includes an arithmetic circuit, the first main surface of the piezoelectric film includes a first region and a second region; the third direction is a direction perpendicular to the first direction, a fourth direction is a direction perpendicular to the first direction and the third direction, a fifth direction is opposite to the fourth direction; When viewed in the first direction, the first region is located on the fourth direction side of a first straight line extending in the third direction, When viewed in the first direction, the second region is located on the fifth direction side of the first straight line, the arithmetic circuit determines whether the first region or the second region has been deformed based on the second signal. An antenna device according to (8) or (9).

[0108] (11) When the arithmetic circuit determines that the first region has been deformed, one or more antenna first electrodes located in the first region among the one or more antenna first electrodes stop emitting or receiving the second signal; When the arithmetic circuit determines that the second region has been deformed, one or more antenna first electrodes located in the second region among the one or more antenna first electrodes stop emitting or receiving the second signal. The antenna device according to (10).

[0109] (12) the sensor includes four or more sensor first electrodes; the first major surface of the piezoelectric film includes a central region; the central region is surrounded by a plurality of straight lines connecting the centers of gravity of the four or more sensor first electrodes when viewed in the first direction, all of the one or more antenna first electrodes are located within the central region when viewed in the first direction; An antenna device according to any one of (1) to (11).

[0110] (13) An antenna device according to any one of (1) to (12), A display; It is equipped with the indicator is located on the first direction side of the one or more sensor second electrodes; electronic equipment.

[0111] (14) The antenna device according to (12), A display; It is equipped with the indicator is located on the first direction side of the one or more sensor second electrodes, the display is located within the central region when viewed in the first direction; all of the one or more antenna first electrodes are located within an outer edge of the display when viewed in the first direction; electronic equipment.

[0112] (15) An antenna device according to any one of (1) to (14), a protective film layer; It is equipped with the second direction is opposite to the first direction, the protective film layer is located on the second direction side of the one or more sensor first electrodes and the one or more antenna first electrodes; electronic equipment. [Explanation of symbols]

[0113] 1, 1a to 1d: Antenna device 10, 10c: Sensor 100a to 100d, 100a2 to 100d2, 103: first sensor electrode 101: Piezoelectric film 102a to 102d: second sensor electrodes 20,20c:Antenna 200: Antenna first electrode 201: Antenna second electrode SF1: First main surface of the piezoelectric film SF2: Second main surface of the piezoelectric film

Claims

1. a sensor including one or more sensor first electrodes, one or more sensor second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes and antenna second electrodes; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the one or more sensor first electrodes are provided on a first main surface of the piezoelectric film; the one or more second sensor electrodes are provided on a second main surface of the piezoelectric film; each of the one or more antenna first electrodes is provided on a first main surface of the piezoelectric film; each of the one or more antenna first electrodes does not overlap with the one or more sensor first electrodes and the one or more sensor second electrodes when viewed in the first direction; Antenna device.

2. the antenna second electrode is provided on a second main surface of the piezoelectric film; The antenna device according to claim 1 .

3. each of the one or more sensor first electrodes is a reference electrode connected to a reference potential; each of the one or more sensor second electrodes is a signal electrode; 3. The antenna device according to claim 1 or 2.

4. the antenna second electrode is a reference electrode connected to a reference potential; 3. The antenna device according to claim 1 or 2.

5. each of the one or more sensor second electrodes is located within an outer edge of the one or more sensor first electrodes when viewed in the first direction; 3. The antenna device according to claim 1 or 2.

6. a shortest distance between each of the one or more sensor first electrodes and the antenna first electrode is shorter than a shortest distance between each of the one or more sensor first electrodes and the one or more sensor second electrodes; 6. The antenna device according to claim 5.

7. a sensor including a sensor first electrode, one or more sensor second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes; a dielectric layer having dielectric properties; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the first sensor electrode is provided on a first main surface of the piezoelectric film, each of the one or more sensor second electrodes is provided on a second principal surface of the piezoelectric film; the second direction is opposite to the first direction; the dielectric layer is located closer to the second direction than the sensor first electrode, the dielectric layer has a dielectric layer first main surface and a dielectric layer second main surface arranged in this order in the first direction, each of the one or more antenna first electrodes is provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer; each of the one or more antenna first electrodes radiates or receives a second signal; the one or more antenna first electrodes include a first radiation electrode and a second radiation electrode; a frequency of the second signal radiated or received by the first radiation electrode is different from a frequency of the second signal radiated or received by the second radiation electrode; Antenna device.

8. The antenna device further includes an arithmetic circuit, the first main surface of the piezoelectric film includes a first region and a second region; the third direction is a direction perpendicular to the first direction, a fourth direction is a direction perpendicular to the first direction and the third direction, the fifth direction is opposite to the fourth direction; When viewed in the first direction, the first region is located on the fourth direction side of a first straight line extending in the third direction, When viewed in the first direction, the second region is located on the fifth direction side of the first straight line, the arithmetic circuit determines whether the first region or the second region has been deformed based on the second signal; 8. The antenna device according to claim 7.

9. When the arithmetic circuit determines that the first region has been deformed, one or more antenna first electrodes located in the first region among the one or more antenna first electrodes stop emitting or receiving the second signal; When the arithmetic circuit determines that the second region has been deformed, one or more antenna first electrodes located in the second region among the one or more antenna first electrodes stop emitting or receiving the second signal.

9. The antenna device according to claim 8.

10. A sensor including a sensor first electrode, one or more sensor second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes; a dielectric layer having dielectric properties; an arithmetic circuit; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the first sensor electrode is provided on a first main surface of the piezoelectric film, each of the one or more sensor second electrodes is provided on a second principal surface of the piezoelectric film; the second direction is opposite to the first direction; the dielectric layer is located closer to the second direction than the sensor first electrode, the dielectric layer has a dielectric layer first main surface and a dielectric layer second main surface arranged in this order in the first direction, each of the one or more antenna first electrodes is provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer; each of the one or more antenna first electrodes radiates or receives a second signal; the first main surface of the piezoelectric film includes a first region and a second region; the third direction is a direction perpendicular to the first direction, a fourth direction is a direction perpendicular to the first direction and the third direction, the fifth direction is opposite to the fourth direction; When viewed in the first direction, the first region is located on the fourth direction side of a first straight line extending in the third direction, When viewed in the first direction, the second region is located on the fifth direction side of the first straight line, the arithmetic circuit determines whether the first region or the second region has been deformed based on the second signal; Antenna device.

11. the sensor includes four or more sensor first electrodes; the first major surface of the piezoelectric film includes a central region; the central region is surrounded by a plurality of straight lines connecting the centers of gravity of the four or more sensor first electrodes as viewed in the first direction, all of the one or more antenna first electrodes are located within the central region when viewed in the first direction; The antenna device according to claim 1, claim 2, claim 7, claim 8 or claim 10.

12. A sensor including a sensor first electrode, one or more sensor second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes; a dielectric layer having dielectric properties; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the first sensor electrode is provided on a first main surface of the piezoelectric film, each of the one or more sensor second electrodes is provided on a second principal surface of the piezoelectric film; the second direction is opposite to the first direction; the dielectric layer is located closer to the second direction than the sensor first electrode, the dielectric layer has a dielectric layer first main surface and a dielectric layer second main surface arranged in this order in the first direction, each of the one or more antenna first electrodes is provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer; the sensor includes four or more sensor first electrodes; the first major surface of the piezoelectric film includes a central region; the central region is surrounded by a plurality of straight lines connecting the centers of gravity of the four or more sensor first electrodes as viewed in the first direction, all of the one or more antenna first electrodes are located within the central region when viewed in the first direction; Antenna device.

13. an antenna device according to claim 1, claim 2, claim 7, claim 8, claim 10 or claim 12; A display; It is equipped with the indicator is located on the first direction side of the one or more sensor second electrodes; electronic equipment.

14. An antenna device; A display; It is equipped with The antenna device includes: a sensor including a sensor first electrode, one or more sensor second electrodes, and a piezoelectric film; an antenna including one or more antenna first electrodes; a dielectric layer having dielectric properties; It is equipped with the piezoelectric film has a piezoelectric film first main surface and a piezoelectric film second main surface; the first principal surface of the piezoelectric film and the second principal surface of the piezoelectric film are aligned in this order in a first direction; the first sensor electrode is provided on a first main surface of the piezoelectric film, each of the one or more sensor second electrodes is provided on a second principal surface of the piezoelectric film; the second direction is opposite to the first direction; the dielectric layer is located closer to the second direction than the sensor first electrode, the dielectric layer has a dielectric layer first main surface and a dielectric layer second main surface arranged in this order in the first direction, each of the one or more antenna first electrodes is provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer; the indicator is located on the first direction side of the one or more sensor second electrodes; electronic equipment.

15. an antenna device according to claim 11; A display; It is equipped with the indicator is located on the first direction side of the one or more sensor second electrodes, the display is located within the central region when viewed in the first direction; all of the one or more antenna first electrodes are located within an outer edge of the display when viewed in the first direction; electronic equipment.

16. an antenna device according to claim 1, claim 2, claim 7, claim 8, claim 10 or claim 12; a protective film layer; It is equipped with the second direction is opposite to the first direction; the protective film layer is located on the second direction side of the one or more sensor first electrodes and the one or more antenna first electrodes; electronic equipment.

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