Antenna device and electronic equipment

Abstract

The antenna device includes: 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 one or more antenna second electrodes, the piezoelectric film having 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 arranged in this order along a first direction, the one or more sensor first electrodes being provided on the piezoelectric film first main surface, the one or more sensor second electrodes being provided on the piezoelectric film second main surface, and the one or more sensor third electrodes being provided on the piezoelectric film second 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, and the one or more antenna first electrodes do not overlap the one or more sensor first electrodes and the one or more sensor second electrodes when viewed in the first direction.

Description

Technical Field

[0001] The present invention relates to an antenna device including an antenna for communication and an electronic device including the antenna device. Background Art

[0002] Patent Document 1 describes a touch screen that includes an antenna pattern, column-direction wiring, row-direction wiring, and a transparent substrate. The antenna pattern is used for communication. The touch screen determines the position of a user's touch on the transparent substrate based on the capacitance generated between the column-direction wiring and the row-direction wiring.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2021-157421 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] In the field of a touch panel having an antenna for communication as described in Patent Document 1, it is desired to easily improve the communication performance of the antenna.

[0008] An object of the present invention is to provide an antenna device that can easily improve the communication performance of the antenna.

[0009] Solutions for solving problems

[0010] An antenna device according to one embodiment of the present invention includes:

[0011] A sensor comprising one or more first sensor electrodes, one or more second sensor electrodes, and a piezoelectric film; and

[0012] An antenna comprising one or more first antenna electrodes and second antenna electrodes,

[0013] The piezoelectric film has a first main surface and a second main surface.

[0014] The first main surface of the piezoelectric film and the second main surface of the piezoelectric film are arranged in sequence along the first direction,

[0015] The one or more first sensor electrodes are provided on the first main surface of the piezoelectric film.

[0016] The one or more second sensor electrodes are provided on the second main surface of the piezoelectric film.

[0017] The one or more first antenna electrodes are each provided on the first main surface of the piezoelectric film.

[0018] Each of the one or more first antenna electrodes does not overlap with the one or more first sensor electrodes and the one or more second sensor electrodes when viewed along the first direction.

[0019] An antenna device according to one embodiment of the present invention includes:

[0020] A sensor comprising a first sensor electrode, one or more second electrodes, and a piezoelectric film;

[0021] An antenna comprising one or more first antenna electrodes; and

[0022] a dielectric layer having dielectric properties,

[0023] The piezoelectric film has a first main surface and a second main surface.

[0024] The first main surface of the piezoelectric film and the second main surface of the piezoelectric film are arranged in sequence along the first direction,

[0025] The first sensor electrode is provided on the first main surface of the piezoelectric film.

[0026] The one or more second sensor electrodes are each provided on the second main surface of the piezoelectric film.

[0027] The second direction is the opposite direction of the first direction,

[0028] The dielectric layer is located closer to the second direction than the first sensor electrode.

[0029] The dielectric layer has a first main surface and a second main surface of the dielectric layer arranged in sequence along the first direction.

[0030] The one or more first antenna electrodes are each provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer.

[0031] Effects of the Invention

[0032] According to the antenna device of one embodiment of the present invention, the communication performance of the antenna can be easily improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a perspective view showing the antenna device 1 according to the first embodiment.

[0034] Figure 2 This is a diagram of the antenna device 1 as viewed in the negative direction of the Z axis.

[0035] Figure 3 This is a diagram of the antenna device 1 as viewed in the positive direction of the Z axis.

[0036] Figure 41 is a diagram showing the piezoelectric film 101 .

[0037] Figure 5 It is an exploded perspective view showing the antenna device Ex of Comparative Example 1.

[0038] Figure 6 This is a diagram showing an antenna device 1 a according to a first modification of the antenna device 1 .

[0039] Figure 7 This is a diagram showing an antenna device 1 b according to a second modification of the antenna device 1 .

[0040] Figure 8 It is an exploded perspective view showing an antenna device 1 c according to the second embodiment.

[0041] Figure 9 This is a diagram of the antenna device 1 c as viewed in the positive direction of the Z axis.

[0042] Figure 10 1 is a diagram showing an electronic device EE1 including an antenna device 1 .

[0043] Figure 11 This is a diagram showing an electronic device EE1a according to a first modification of the electronic device EE1. DETAILED DESCRIPTION

[0044] [First embodiment]

[0045] Hereinafter, an antenna device 1 according to a first embodiment will be described with reference to the drawings. Figure 1 It is a perspective view showing the antenna device 1 according to the first embodiment. Figure 2 This is a diagram of the antenna device 1 as viewed in the negative direction of the Z axis. Figure 3 This is a diagram of the antenna device 1 as viewed in the positive direction of the Z axis. Figure 4 1 is a diagram showing the piezoelectric film 101 .

[0046] In this embodiment, directions are defined as follows. Figure 1As shown, the direction in which one or more first sensor electrodes 100a-100d and the piezoelectric film 101 are arranged is defined as the Z-axis direction. The direction in which one or more first sensor electrodes 100a-100d and the piezoelectric film 101 are arranged in sequence is defined as the negative Z-axis direction. The direction in which the piezoelectric film 101 and one or more first sensor electrodes 100a-100d are arranged in sequence 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. Furthermore, 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 the opposite direction of 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 Y-axis direction. 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 and is the opposite direction to the fourth direction DIR4.

[0047] The antenna device 1 is a device provided in electronic devices such as smartphones. Figures 1 to 3 As shown, the antenna device 1 includes a sensor 10 , an antenna 20 , and a wiring member 30 .

[0048] In this embodiment, specifically, the sensor 10 is a piezoelectric sensor. Figures 1 to 3 As shown, 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). Figures 1 to 3 In the example shown, the sensor 10 includes four first sensor electrodes 100a, 100b, 100c, and 100d. Figure 3 In the illustrated example, the sensor 10 includes four second sensor electrodes 102 a , 102 b , 102 c , and 102 d .

[0049] like Figures 1 to 4 As shown in FIG. 1 , the piezoelectric film 101 has a rectangular shape with a long side extending along the X axis and a short side extending along the Y axis. Figures 1 to 3 As shown, the piezoelectric film 101 includes a first principal surface SF1 and a second principal surface SF2 . The first principal surface SF1 and the second principal surface SF2 are arranged in this order in the negative direction of the Z axis (first direction DIR1 ).

[0050] The piezoelectric film 101 generates an electric charge corresponding to the amount of deformation of the piezoelectric film 101. For example, the polarity of the electric charge generated when the piezoelectric film 101 is stretched along the X-axis direction is opposite to the polarity of the electric charge generated when the piezoelectric film 101 is stretched along the Y-axis direction. Specifically, the piezoelectric film 101 is a film formed of a chiral polymer. The chiral polymer is, for example, polylactic acid (PLA), in particular, L-type polylactic acid (PLLA). The main chain of PLLA has a helical structure. PLLA has piezoelectricity when the molecules are oriented under uniaxial stretching. The piezoelectric film 101 has a piezoelectric constant of d14. As Figure 4 As shown, the uniaxial stretching direction OD of the piezoelectric film 101 forms an angle of 45 degrees relative to the X-axis and Y-axis directions. This 45-degree angle includes, for example, an angle of approximately 45 degrees ± 10 degrees. As a result, the piezoelectric film 101 generates an electric charge by stretching along the X-axis or Y-axis. For example, when the piezoelectric film 101 stretches along the X-axis, a positive electric charge is generated. For example, when the piezoelectric film 101 stretches along the Y-axis, a negative electric charge is generated. The magnitude of the electric charge depends on the differential value of the deformation of the piezoelectric film 101 caused by stretching or compression.

[0051] In this embodiment, the first sensor electrode 100a is a reference electrode connected to a reference potential. As an example, the first sensor electrode 100a is connected to a ground potential. Figure 1 and Figure 2 As shown, the first sensor electrode 100a is provided on the first principal surface SF1 of the piezoelectric film. Specifically, the first sensor electrode 100a is provided at the end of the first principal surface SF1 of the piezoelectric film in the negative direction of the X axis and the positive direction of the Y axis. The first sensor electrode 100a is fixed to the first principal surface SF1 of the piezoelectric film using an adhesive (not shown) such as OCA. The size of the first sensor electrode 100a is smaller than that of the piezoelectric film 101. The length of the first sensor 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 first sensor electrode 100a in the Y axis direction is shorter than the length of the piezoelectric film 101 in the Y axis direction.

[0052] like Figure 1 and Figure 2 As shown, the first sensor electrode 100b is provided at the negative end of the piezoelectric film first principal surface SF1 in the X-axis direction and the negative end in the Y-axis direction. The other structures of the first sensor electrode 100b are the same as those of the first sensor electrode 100a, and therefore description thereof is omitted.

[0053] like Figure 1 and Figure 2 As shown, the first sensor electrode 100c is provided at the end of the first principal surface SF1 of the piezoelectric film in the positive direction of the X axis and the negative direction of the Y axis. The other structures of the first sensor electrode 100c are the same as those of the first sensor electrode 100a, and therefore description thereof is omitted.

[0054] like Figure 1 and Figure 2 As shown, the first sensor electrode 100d is provided at the end of the piezoelectric film first principal surface SF1 in the positive direction of the X axis and the positive direction of the Y axis. The other structures of the first sensor electrode 100d are the same as those of the first sensor electrode 100a, and therefore description thereof is omitted.

[0055] In this embodiment, the second sensor electrode 102a is a signal electrode. Figure 3 As shown, the second sensor electrode 102a is provided on the second principal surface SF2 of the piezoelectric film. Specifically, the second sensor electrode 102a is provided at an end of the second principal surface SF2 of the piezoelectric film in the negative direction of the X axis and in the positive direction of the Y axis. The second sensor electrode 102a is fixed to the second principal surface SF2 of the piezoelectric film using an adhesive (not shown) such as OCA. When viewed along the Z axis, the second sensor electrode 102a overlaps with the first sensor electrode 100a. The size of the second sensor electrode 102a is approximately the same as that of the first sensor electrode 100a.

[0056] The second sensor electrode 102b is provided at both the negative end of the piezoelectric film second principal surface SF2 in the X-axis direction and the negative end in the Y-axis direction. When viewed along the Z-axis, the second sensor electrode 102b overlaps with the first sensor electrode 100b. The remaining structure of the second sensor electrode 102b is identical to that of the second sensor electrode 102a, and therefore, description thereof will be omitted.

[0057] The second sensor electrode 102c is provided at an end portion of the second principal surface SF2 of the piezoelectric film in the positive direction of the X axis and in the negative direction of the Y axis. When viewed along the Z axis, the second sensor electrode 102c overlaps with the first sensor electrode 100c. The remaining structure of the second sensor electrode 102c is identical to that of the second sensor electrode 102a, and therefore, description thereof will be omitted.

[0058] The second sensor electrode 102d is provided at both the positive end of the piezoelectric film second principal surface SF2 in the X-axis direction and the positive end in the Y-axis direction. When viewed along the Z-axis, the second sensor electrode 102d overlaps with the first sensor electrode 100d. The remaining structure of the second sensor electrode 102d is identical to that of the second sensor electrode 102a, and therefore, description thereof will be omitted.

[0059] According to the above configuration, the sensor 10 outputs the first signal according to the deformation of the sensor 10. The sensor 10 outputs the first signal based on the potential difference between the one or more first sensor electrodes 100a to 100d and the one or more second sensor electrodes 102a to 102d.

[0060] 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 a patch antenna, for example. Figures 1 to 3 As shown, the antenna 20 includes one or more first antenna electrodes 200 and second antenna electrodes 201 .

[0061] In this embodiment, if Figure 1 and Figure 2 As shown, one or more first antenna electrodes 200 are provided on the piezoelectric film 101. Specifically, one or more first antenna electrodes 200 are provided on the first main surface SF1 of the piezoelectric film. One or more first antenna electrodes 200 are arranged in a matrix on the first main surface SF1 of the piezoelectric film. Specifically, as shown Figure 1 As shown, on the first main surface SF1 of the piezoelectric film, there are multiple groups ST of multiple antenna first electrodes 200 arranged along the X-axis. The multiple groups are arranged at equal intervals along the Y-axis. One or more antenna first electrodes 200 do not contact each other. One or more antenna first electrodes 200 do not overlap with each other when viewed along the Z-axis direction. One or more antenna first electrodes 200 do not overlap with one or more sensor first electrodes 100a~100d when viewed along the first direction DIR1. One or more antenna first electrodes 200 do not overlap with one or more sensor second electrodes 102a~102d when viewed along the Z-axis direction (first direction DIR1). As shown Figure 2 As shown, high-frequency signals are input and output to each of the one or more antenna first electrodes 200 via the wiring member 30. Thus, each of the one or more antenna first electrodes 200 radiates or receives a second signal. Each of the one or more antenna first electrodes 200 radiates the second signal, for example, in the positive direction of the Z axis.

[0062] The second antenna electrode 201 is a reference electrode connected to a reference potential. For example, the second antenna electrode 201 is connected to a ground potential. Figure 3 As shown, in this embodiment, the second antenna electrode 201 is provided on the piezoelectric film 101. Specifically, the second antenna electrode 201 is provided on the second main surface SF2 of the piezoelectric film. The second antenna electrode 201 is provided near the center of the second main surface SF2 of the piezoelectric film. The second antenna electrode 201 is not provided at each of the four corners of the second main surface SF2 of the piezoelectric film. Each of the four corners includes a corner formed by the long side and the short side of the piezoelectric film 101 and its vicinity. Figure 2 and Figure 3As shown, the second antenna electrode 201 overlaps with one or more first antenna electrodes 200 when viewed along the Z-axis. Each of the one or more first antenna electrodes 200 is located within the outer edge of the second antenna electrode 201 when viewed along the Z-axis. The second antenna electrode 201 does not overlap with the first sensor electrodes 100a to 100d when viewed along the Z-axis. The second antenna electrode 201 does not overlap with the one or more second sensor electrodes 102a to 102d when viewed along the Z-axis.

[0063] (Effect)

[0064] The antenna device 1 improves the communication performance of the antenna 20. Hereinafter, referring to the drawings, the antenna device Ex of Comparative Example 1 and the antenna device 1 will be described in comparison. Figure 5 It is an exploded perspective view showing the antenna device Ex of Comparative Example 1.

[0065] 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 having one or more first antenna electrodes 200ex and one or more second antenna electrodes 201ex. The one or more first sensor electrodes 100ex, the piezoelectric film 101ex, and the one or more second sensor 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 first antenna electrodes 200ex, and the second antenna electrodes 201ex. The remaining structure of the antenna device Ex is identical to that of the antenna device 1, and therefore its description is omitted.

[0066] In antenna device Ex, sensor 10ex is located on the positive side of the Z axis relative to antenna 20ex. In this case, one or more second sensor electrodes 102ex connected to a reference potential are located on the positive side of the Z axis relative to one or more first antenna electrodes 200ex. Each of the one or more first antenna electrodes 200ex radiates a second signal, for example, in the positive direction of the Z axis. In this case, the second signal radiated in the positive direction of the Z axis may be blocked by the one or more second sensor electrodes 102ex located on the positive side of the Z axis relative to the one or more first antenna electrodes 200ex. Consequently, in antenna device Ex, the communication performance of antenna 20ex may be reduced.

[0067] On the other hand, in antenna device 1, one or more first antenna electrodes 200 and one or more first sensor electrodes 100a to 100d are provided on the first principal surface SF1 of the piezoelectric film. When viewed along the first direction DIR1, the one or more first antenna electrodes 200 do not overlap with the one or more first sensor electrodes 100a to 100d. Furthermore, the one or more second sensor electrodes 102a to 102d are provided on the second principal surface SF2 of the piezoelectric film. With this configuration, for example, when the one or more first antenna electrodes 200 each radiate 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 first sensor electrodes 100a to 100d or the one or more second sensor electrodes 102a to 102d. Consequently, the communication performance of antenna 20 is less likely to be degraded. Therefore, according to antenna device 1, the communication performance of antenna 20 is easily improved.

[0068] Similarly, in antenna device 1, when one or more first antenna electrodes 200 each receive the second signal, the second signal is not blocked by one or more first sensor electrodes 100a-100d or one or more second sensor electrodes 102a-102d. This effectively reduces the communication performance of antenna 20. Therefore, antenna device 1 can easily improve the communication performance of antenna 20.

[0069] In antenna device 1, one or more first sensor electrodes 100a to 100d, one or more second sensor electrodes 102a to 102d, one or more first antenna electrodes 200, and one or more second antenna electrodes 201 are all provided on piezoelectric film 101. In this case, antenna device 1 is thinner than antenna device Ex, which includes both a sensor 10ex layer and an antenna 20ex layer. Therefore, antenna device 1 can be easily reduced in height.

[0070] In antenna device 1, one or more first antenna electrodes 200 are provided on the piezoelectric film's first principal surface SF1. The second antenna electrode 201 is provided on the piezoelectric film's second principal surface SF2. Therefore, when each of the one or more first antenna 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 less likely to be blocked by the second antenna electrodes 201. Consequently, the communication performance of antenna 20 is less likely to be degraded.

[0071] 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. In this case, the user 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. Under the action of this force, the sensor 10 deforms 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. Here, in the antenna device 1, one or more first sensor electrodes 100a to 100d serving as reference electrodes are each provided on the first principal surface SF1 of the piezoelectric film. One or more second sensor electrodes 102a to 102d serving as signal electrodes are each provided on the second principal surface SF2 of the piezoelectric film. In this case, in the antenna device 1, the one or more first sensor electrodes 100a to 100d are each located on the positive side of the Z axis relative to the one or more second sensor electrodes 102a to 102d. Therefore, in this electronic device, each of the one or more first sensor electrodes 100a-100d is positioned closer to the elastic member than the one or more second sensor electrodes 102a-102d. In this case, the one or more second sensor electrodes 102a-102d are less susceptible to noise generated by a user touching the elastic member due to the one or more first sensor electrodes 100a-100d. Consequently, sensor 10 is less likely to malfunction.

[0072] [Modification 1 of Antenna Device 1]

[0073] Hereinafter, an antenna device 1 a according to a first modification of the antenna device 1 will be described with reference to the drawings. Figure 6 This is a diagram showing an antenna device 1 a according to a first modification of the antenna device 1 .

[0074] Antenna device 1a differs from antenna device 1 in that it includes multiple types of antenna electrodes. For example, in antenna device 1a, one or more first antenna electrodes 200 include one or more first radiating electrodes 200a, one or more second radiating electrodes 200b, one or more third radiating electrodes 200c, one or more fourth radiating electrodes 200d, and one or more fifth radiating electrodes 200e. The frequencies of the second signals output by each of the one or more first radiating electrodes 200a through the one or more fifth radiating electrodes 200e differ from one another. For example, the frequency of the second signal output by the one or more first radiating electrodes 200a differs from the frequency of the second signal output by the one or more second radiating electrodes 200b.

[0075] Similarly, the frequency of the second signal output by one or more first radiation electrodes 200a is different from the frequency of the second signal output by one or more third radiation electrodes 200c. The frequency of the second signal output by one or more first radiation electrodes 200a is different from the frequency of the second signal output by one or more fourth radiation electrodes 200d. The frequency of the second signal output by one or more first radiation electrodes 200a is different from the frequency of the second signal output by one or more fifth radiation electrodes 200e. The same applies to the one or more second radiation electrodes 200b, the one or more third radiation electrodes 200c, the one or more fourth radiation electrodes 200d, and the one or more fifth radiation electrodes 200e.

[0076] In this modification, the first main surface SF1 of the piezoelectric film includes four regions. Specifically, the first main 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, Figure 6 As shown, a first straight line SL1 extending along the third direction DIR3 is defined. In this modification, the first straight line SL1 overlaps with the center of the piezoelectric film 101 when viewed along the Z-axis direction. In addition, a second straight line SL2 extending along the fourth direction DIR4 is defined. In this modification, the second straight line SL2 overlaps with the center of the piezoelectric film 101 when viewed along the Z-axis direction. At this time, when viewed along 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) relative to the first straight line SL1. When viewed along 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) relative to the first straight line SL1. When viewed along the first direction DIR1, the first region Ar1 and the second region Ar2 are located on the negative side of the X axis relative to the second straight line SL2. When viewed along the first direction DIR1 , the third region Ar3 and the fourth region Ar4 are located on the positive side of the X axis with respect to the second straight line SL2 .

[0077] 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 in each of the first, second, third, and fourth regions Ar1, Ar2, Ar3, and Ar4.

[0078] Antenna device 1a also differs from antenna device 1 in that it further includes a calculation circuit (not shown). The calculation circuit is electrically connected to sensor 10 via a wiring member (not shown). The calculation circuit receives a first signal from sensor 10. Based on the first signal, the calculation circuit determines whether any of first to fourth areas Ar1 to Ar4 has deformed.

[0079] The arithmetic circuit is electrically connected to the antenna 20 via a wiring member (not shown). The arithmetic circuit receives the second signal from the antenna 20. In this variation, the arithmetic circuit determines whether deformation has occurred in the first area Ar1, the second area Ar2, the third area Ar3, or the fourth area Ar4 based on the first and second signals. For example, the arithmetic circuit determines whether deformation has occurred in any of the first to fourth areas Ar1 to Ar4 based on whether the sensitivity of the antenna 20 exceeds a predetermined threshold.

[0080] If the computation circuit determines that the first area Ar1 has been deformed, one or more of the one or more first antenna electrodes 200 located in the first area Ar1 stops radiating or receiving the second signal. For example, a circuit (not shown) such as a tuning circuit included in the antenna device 1a inputs and outputs high-frequency signals to and from the one or more first antenna electrodes 200. This circuit stops inputting and outputting high-frequency signals to and from the one or more first antenna electrodes 200 located in the first area Ar1. If the sensitivity of the one or more first antenna electrodes 200 located in the first area Ar1 falls below a predetermined threshold (when the antenna sensitivity has recovered), the one or more first antenna electrodes 200 located in the first area Ar1 resume radiating or receiving the second signal.

[0081] At this time, the operational circuit determines the area where one or more antenna first electrodes 200 have stopped radiating the second signal or stopped receiving the second signal. The operational circuit then determines that the determined area is deformed. For example, the operational circuit determines that one or more antenna first electrodes 200 located in the first area Ar1 have stopped radiating the second signal or stopped receiving the second signal. In this case, the operational circuit determines that deformation has occurred near the first area Ar1. Thus, in this modified example, the operational circuit determines the position of the deformed sensor 10 based on both the first signal and the second signal. Therefore, compared to a case where the position of the sensor deformation is determined based solely on the first signal, the position determination accuracy of the operational circuit of the antenna device 1a is improved.

[0082] Similarly, when the calculation circuit determines that the second area Ar2 is deformed, one or more of the one or more first antenna electrodes 200 located in the second area Ar2 stops radiating the second signal or stops receiving the second signal. The calculation circuit also performs the same process when it determines that the third area Ar3 or the fourth area Ar4 is deformed.

[0083] [Modification 2 of Antenna Device 1]

[0084] Hereinafter, an antenna device 1 b according to a second modification of the antenna device 1 will be described with reference to the drawings. Figure 71 is a diagram showing an antenna device 1b according to a second modification of the antenna device 1. Figure 7 In FIG, one or more second sensor electrodes 102a to 102d are seen through.

[0085] The antenna device 1 b differs from the antenna device 1 in that the sensor 10 includes one or more first sensor electrodes 100 a 2 to 100 d 2 instead of the one or more first sensor electrodes 100 a to 100 d .

[0086] In this modification, the size of the first sensor electrode 100a2 is larger than the size of the second sensor electrode 102a (see Figure 7 ). The second sensor electrode 102a is located inside the outer edge of the first sensor electrode 100a2 when viewed along the Z-axis direction (first direction DIR1). In this case, the shortest distance between the first sensor electrode 100a2 and one or more first antenna electrodes 200 is shorter than the shortest distance between the first sensor electrode 100a2 and one or more second sensor electrodes 102a to 102d. Specifically, Figure 7 In the example shown, one or more antenna first electrodes 200 include antenna first electrode 2000. When viewed along the Z-axis, antenna first electrode 2000 is closest to sensor first electrode 100a2 among the one or more antenna first electrodes 200. Sensor second electrode 102a is closest to sensor first electrode 100a2 among the one or more sensor second electrodes 102a to 102d. In this case, the distance between sensor first electrode 100a2 and antenna first electrode 2000 is shorter than the distance between sensor first electrode 100a2 and sensor second electrode 102a. This configuration makes sensor second electrode 102a less susceptible to noise. As a result, sensor 10 is less likely to malfunction.

[0087] The other structures of the first sensor electrodes 100b2, 100c2, and 100d2 are the same as those of the first sensor electrode 100a2, and therefore their description is omitted. In this modification, the first sensor electrodes 100b2, 100c2, and 100d2 are less susceptible to noise, similar to the first sensor electrode 100a2.

[0088] [Second embodiment]

[0089] Hereinafter, an antenna device 1 c according to a second embodiment will be described with reference to the drawings. Figure 8 : is an exploded perspective view showing an antenna device 1c according to the second embodiment. Figure 8 In the figure, description of the wiring member 30 is omitted. Figure 9 This is a diagram of the antenna device 1 c as viewed in the positive direction of the Z axis.

[0090] like Figure 8 and Figure 9 As shown, the antenna device 1 c differs from the antenna device 1 in that it includes a sensor 10 c different from the sensor 10 , an antenna 20 c different from the antenna 20 , and a dielectric layer 40 .

[0091] like Figure 8 As shown, the sensor 10c includes a first sensor electrode 103 instead of one or more first sensor electrodes 100a to 100d. The first sensor electrode 103 is connected to a reference potential. The first sensor electrode 103 is provided on the first main surface SF1 of the piezoelectric film. The first sensor electrode 103 covers, for example, substantially the entire first main surface SF1 of the piezoelectric film. The first sensor electrode 103 overlaps with one or more second sensor electrodes 102a to 102d when viewed along the Z-axis direction. The one or more second sensor electrodes 102a to 102d are located within the outer edge of the first sensor electrode 103 when viewed along the Z-axis direction. In this embodiment, the sensor 10c outputs a first signal based on the potential difference between the first sensor electrode 103 and the one or more second sensor electrodes 102a to 102d. The remaining structure of the sensor 10c is the same as that of the sensor 10, and therefore its description is omitted.

[0092] like Figure 8 As shown, 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 includes a first dielectric layer main surface SF1c and a second dielectric layer main surface SF2c. The first dielectric layer main surface SF1c and the second dielectric layer main surface SF2c are arranged in sequence in the negative Z-axis direction (first direction DIR1). The dielectric layer 40 is located on the positive Z-axis side (second direction DIR2 side) relative to the first sensor electrode 103. The dielectric layer 40 has dielectric properties. For example, the dielectric layer 40 includes an ITO layer and a PET layer.

[0093] The antenna 20c is different from the antenna 20 in that it does not include the second antenna electrode 201 connected to the reference potential. In this embodiment, the first sensor electrode 103 functions as the reference electrode of the patch antenna 20c. Figure 8 As shown, in antenna 20c, one or more first antenna electrodes 200 are provided on the first principal surface SF1c of the dielectric layer. When viewed along the Z-axis, the one or more first antenna electrodes 200 overlap with the first sensor electrode 103. When viewed along the Z-axis, the one or more first antenna electrodes 200 are located within the outer edge of the first sensor electrode 103. In this embodiment, the first sensor electrode 103 functions as a ground for the patch antenna, or antenna 20c.

[0094] (Effect)

[0095] The antenna device 1c easily improves the communication performance of the antenna 20c. Specifically, in the antenna 20c, one or more first antenna electrodes 200 are provided on the first principal surface SF1c of the dielectric layer. In this case, in the antenna device 1c, the one or more first antenna electrodes 200 are located on the positive side of the Z axis relative to the first sensor electrode 103, which serves as the reference electrode. Therefore, similar to the antenna device 1, when the one or more first antenna electrodes 200 each radiate the second signal in the positive direction of the Z axis, the second signal is less likely to be blocked by the first sensor electrode 103. Therefore, the communication performance of the antenna 20c easily improves.

[0096] In the antenna device 1c, one or more first antenna electrodes 200 are provided on the dielectric layer's first main surface SF1c. Neither the first sensor electrode 103 nor the one or more second sensor electrodes 102a to 102d are provided on the dielectric layer's first main surface SF1c. Therefore, in the antenna device 1c, one or more first antenna electrodes 200 can each be provided on the entire surface of the dielectric layer's first main surface SF1c. This facilitates increasing the range over which the antenna 20c can radiate or receive the second signal. Consequently, the communication performance of the antenna 20c is easily improved.

[0097] In the antenna device 1c, one or more first antenna electrodes 200 are not provided on the piezoelectric film 101. Consequently, the degree of flexibility in the arrangement of the first sensor electrode 103 and the one or more second sensor electrodes 102a to 102d on the piezoelectric film 101 is increased. Therefore, for example, the arrangement of the first sensor electrode 103 and the one or more second sensor electrodes 102a to 102d can be changed in response to changes in the shape of the antenna device 1c. Consequently, the antenna device 1c can easily accommodate changes in the shape of the antenna device 1c.

[0098] In the antenna device 1c, the first sensor electrode 103 functions as a ground for the antenna 20c. Furthermore, the first sensor electrode 103 also functions as a ground for the sensor 10c. That is, in this embodiment, the ground for the sensor 10c and the ground for the antenna 20c are shared. This allows the antenna device 1c to be thinner than an antenna device in which the sensor and antenna grounds are not shared (the sensor and antenna grounds are provided separately). Consequently, the antenna device 1c can be made shorter.

[0099] [Electronic equipment EE1]

[0100] An example of an electronic device EE1 including the antenna device 1 will be described below with reference to the drawings. Figure 10 1 is a diagram showing an electronic device EE1 including an antenna device 1 .

[0101] The electronic device EE1 is, for example, a smart phone. Figure 10 As shown, the electronic device EE1 includes an antenna device 1 , a protective film layer 50 and a display 60 .

[0102] The protective film layer 50 protects the antenna device 1 and the display 60. Figure 10 As shown, the protective film layer 50 is located on the positive side of the Z axis (the side in the second direction DIR2) relative to the one or more first sensor electrodes 100a-100d and the one or more first antenna electrodes 200. The protective film layer 50 covers the one or more first sensor electrodes 100a-100d, the piezoelectric film 101, and the one or more first antenna electrodes 200. The material of the protective film layer 50 is, for example, glass.

[0103] The user operates the electronic device EE1 by pressing the protective film layer 50. At this point, the sensor 10 outputs a first signal based on the user's operation. Specifically, the user presses the protective film layer 50 in the negative Z-axis direction, for example. This applies a force in the negative Z-axis direction to the sensor 10. This force deforms the sensor 10, protruding in the negative Z-axis direction. The sensor 10 outputs a first signal corresponding to the deformation of the sensor 10.

[0104] The display 60 is an organic EL display, an inorganic EL display, or the like. Figure 10 As shown, 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 (the first direction DIR1 side) relative to one or more of the second sensor electrodes 102a to 102d. The display 60 is located on the negative side of the Z axis relative to the second antenna electrode 201. The user sees the information displayed on the display 60, for example, through the protective film layer 50, a portion of the sensor 10 component, and a portion of the antenna 20 component. 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 along the Z axis direction.

[0105] (Effect)

[0106] In electronic device EE1, protective film layer 50 is located on the positive side of the Z axis relative to one or more first sensor electrodes 100a to 100d and one or more first antenna electrodes 200. In this case, protective film layer 50 can easily prevent deformation of sensor 10 in the event of unintended user operation. For example, if protective film layer 50 deforms slightly due to, for example, a user accidentally touching protective film layer 50, sensor 10 is less likely to deform. In other words, electronic device EE1 is less likely to malfunction in the event of unintended user operation of electronic device EE1.

[0107] For example, the one or more first antenna electrodes 200 radiate the second signal in the positive direction of the Z axis. In the electronic device EE1, the display 60 is located on the negative side of the Z axis relative to the one or more second sensor electrodes 102a to 102d. In this case, the second signal radiated by the one or more first antenna electrodes 200 is not blocked by the display 60. Therefore, the communication performance of the antenna 20 is unlikely to be degraded. Similarly, the reception of the second signal by the one or more first antenna electrodes 200 is not blocked by the display 60.

[0108] [Modification 1 of Electronic Device EE1]

[0109] Hereinafter, electronic device EE1a according to a first modification of electronic device EE1 will be described with reference to the drawings. Figure 11 This is a diagram showing an electronic device EE1a according to a first modification of the electronic device EE1. Figure 11 This is a diagram obtained by observing the electronic device EE1a in the negative direction of the Z axis. Figure 11 In the figure, the description of the protective film layer 50 is omitted.

[0110] In the antenna device 1d of the electronic device EE1a, the arrangement of one or more first antenna electrodes 200 is different from the arrangement of one or more first antenna electrodes 200 of the electronic device EE1. Specifically, Figure 11 As shown, the piezoelectric film first principal surface SF1 includes a central region CeAr. When viewed along 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 first sensor electrodes. All of the one or more first antenna electrodes 200 are located within the central region CeAr when viewed along the Z-axis direction (first direction DIR1).

[0111] In more detail, Figure 11As shown, in the sensor 10 of the electronic device EE1a, a straight 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 straight line SLad is defined connecting the center of gravity Ga and the center of gravity Gd of the sensor first electrode 100d. A straight line SLbc is defined connecting the center of gravity Gb and the center of gravity Gc of the sensor first electrode 100c. A straight line SLcd is defined connecting the center of gravity Gc and the center of gravity Gd. In this case, the central area CeAr is the area surrounded by the straight line SLab, the straight line SLad, the straight line SLbc, and the straight line SLcd on the first main surface SF1 of the piezoelectric film. When viewed along the Z-axis direction (first direction DIR1), all of the one or more antenna first electrodes 200 are located within the area surrounded by the straight line SLab, the straight line SLad, the straight line SLbc, and the straight line SLcd.

[0112] Furthermore, electronic device EE1a differs from electronic device EE1a in that it includes a display 60a of a different size from display 60. Display 60a is smaller than display 60. In this variation, display 60a is smaller than central area CeAr. Display 60a is located within central area CeAr when viewed along the Z-axis direction (first direction). In this case, all of the one or more first antenna electrodes 200 are located within the outer edge of display 60 when viewed along the Z-axis direction (first direction DIR1).

[0113] (Effect)

[0114] For example, the user operates the electronic device EE1a by pressing the portion of the protective film layer 50 that overlaps with the display 60a when viewed along the Z-axis direction (hereinafter referred to as the operating portion). Here, the display 60a is located in the central area CeAr when viewed along the Z-axis direction (the first direction). The deformation of the central area CeAr of the piezoelectric film 101 is greater than the deformation of the outer peripheral edge of the piezoelectric film 101. Therefore, when the user presses the operating portion based on the information displayed on the display 60a, the central area CeAr with a larger deformation amount is deformed. In this case, the deformation amount of the piezoelectric film 101 tends to increase. Therefore, the sensitivity of the sensor 10 tends to be improved.

[0115] Furthermore, all of the one or more first antenna electrodes 200 may be located at least in the central area CeAr when viewed along the Z-axis direction (first direction DIR1 ). In this case, the piezoelectric film 101 is also easily deformed, and thus the same effect can be obtained.

[0116] [Other Modifications]

[0117] The antenna device of 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 present invention. The structures of the antenna devices 1, 1a to 1d and the electronic devices EE1, EE1a can also be arbitrarily combined.

[0118] The X-axis, Y-axis, and Z-axis directions are defined for the purpose of explanation. Therefore, the X-axis, Y-axis, and Z-axis directions of the antenna devices 1, 1a to 1d during actual use do not necessarily need to coincide with those of the embodiments and modifications.

[0119] The first to fifth directions DIR1 to DIR5 are defined for explanation purposes. Therefore, the first to fifth directions DIR1 to DIR5 in actual use of the antenna devices 1 and 1a to 1d do not necessarily need to match the first to fifth directions DIR1 to DIR5 of the embodiments and modifications.

[0120] Furthermore, the electronic device EE1 may include any one of the antenna devices 1 a to 1 d instead of the antenna device 1 .

[0121] Furthermore, in antenna devices 1, 1a-1d, one or more first sensor electrodes 100a-100d and one or more second sensor electrodes 102a-102d provided on the piezoelectric film 101 output a first signal. In this case, for example, a calculation circuit receives the first signal. The calculation circuit then performs calculations based on the first signal to determine the position at which sensor 10 is deformed. In other words, the calculation circuit can determine the position at which a user applied force to sensor 10. Therefore, even without including a component such as a touch panel to determine the position pressed by the user, antenna device 1 can determine the position at which a user applied force to sensor 10.

[0122] Furthermore, in the antenna device 1 c , one or more first antenna electrodes 200 may be provided on the second principal surface SF2 c of the dielectric layer.

[0123] Furthermore, in the electronic device EE1a, it is not necessary for all of the at least one first antenna electrode 200 to be located within the outer edge of the display 60a when viewed along the Z-axis direction. It is sufficient for all of the at least one first antenna electrode 200 to be located within the central area CeAr when viewed along the Z-axis direction. However, by having the display 60a located within the central area CeAr when viewed along the Z-axis direction (first direction), the piezoelectric film 101 is more easily deformed. Therefore, in the electronic device EE1a, it is preferable that the display 60a be located within the central area CeAr when viewed along the Z-axis direction (first direction), and that all of the at least one first antenna electrode 200 be located within the display 60a when viewed along the Z-axis direction (first direction DIR1).

[0124] Furthermore, the antenna device 1a only needs to include at least two types of antenna electrodes. For example, one or more first antenna electrodes 200 may include a first radiation electrode 200a and a second radiation electrode 200b.

[0125] Furthermore, in the antenna device 1a, each of the first to fourth regions Ar1 to Ar4 may be defined by imaginarily dividing the first principal surface SF1 of the piezoelectric film into a plurality of regions. Thus, each of the first straight line SL1 and the second straight line SL2 may be an imaginary straight line. Therefore, each of the first straight line SL1 and the second straight line SL2 may not overlap with the center of the piezoelectric film 101 when viewed along the Z-axis direction.

[0126] Furthermore, when the first principal surface SF1 of the piezoelectric film is virtually divided into multiple regions, the electrodes provided in each of the multiple virtually divided regions (hereinafter referred to as the multiple virtual regions) may be of a single type. For example, each of the multiple virtual regions may be provided with a first radiation electrode 200a that is a single type of electrode. In this case, the calculation circuit determines which virtual region among the multiple virtual regions is deformed. The first radiation electrode 200a provided in the deformed virtual region stops radiating or receiving signals.

[0127] Furthermore, the first principal surface SF1 of the piezoelectric film does not necessarily need to be virtually divided into four regions. Alternatively, the first principal surface SF1 of the piezoelectric film may be virtually divided into two regions, for example. 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 relative to the first straight line SL1. The second region is the entire region of the first principal surface SF1 of the piezoelectric film located on the positive side of the X-axis relative to the first straight line SL1.

[0128] Furthermore, when the piezoelectric film first principal surface SF1 is virtually divided into two regions, for example, 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.

[0129] In the antenna device 1 a , the piezoelectric film first principal surface SF1 does not necessarily need to be virtually divided into a plurality of regions, and a single virtual region may be defined on the piezoelectric film first principal surface SF1 .

[0130] Furthermore, in the antenna device 1a, each of the multiple types of antenna electrodes is preferably arranged in two of the multiple virtual areas. For example, the antenna device 1a includes two types of antenna electrodes: a first radiating electrode 200a and a second radiating electrode 200b. In this case, it is preferable that the first radiating electrode 200a is provided in two of the first to fourth areas Ar1 to Ar4, and the second radiating electrode 200b is provided in two of the first to fourth areas Ar1 to Ar4. This allows the antenna electrode provided in one of the first to fourth areas Ar1 to Ar4 (hereinafter referred to as the stop area) to stop radiating or receiving signals, while the antenna electrode provided in areas other than the stop area can still radiate or receive signals. Furthermore, it is more preferable that at least one of the multiple types of antenna electrodes is arranged in each of the multiple virtual areas.

[0131] Furthermore, antenna device 1 communicates based on, for example, the Wi-Fi (registered trademark) standard. In this case, the second signal radiated or received by each of the one or more antenna first electrodes 200 has a frequency of, for example, 5 GHz. Meanwhile, piezoelectric film 101 of sensor 10 detects the first signal, which has a frequency of approximately tens of Hz. Therefore, the second signal does not interfere with the first signal. Therefore, even when the lead-out electrode of antenna 20 and the lead-out electrode of sensor 10 are brought close together, the lead-out electrodes of antenna 20 and sensor 10 are unlikely to interfere with each other.

[0132] Furthermore, the sensor 10 may include five or more first sensor electrodes. The sensor 10 may include five or more second sensor electrodes.

[0133] Furthermore, the antenna 20 may include a plurality of second antenna electrodes 201 .

[0134] Alternatively, the sensor 10 may include three or fewer first sensor electrodes. Alternatively, the sensor 10 may include three or fewer second sensor electrodes. However, for position detection, it is preferred that the sensor 10 include at least two first sensor electrodes and at least two second sensor electrodes. In this case, the two first sensor electrodes are each positioned at a diagonally opposite corner of the piezoelectric film's first principal surface SF1, and the two second sensor electrodes are each positioned at a diagonally opposite corner of the piezoelectric film's second principal surface SF2.

[0135] Furthermore, the antenna 20 may include 21 or more first antenna electrodes 200 , or may include 19 or less first antenna electrodes 200 .

[0136] The size of the one or more first sensor electrodes 100a to 100d and the size of the one or more second sensor electrodes 102a to 102d are not limited to Figures 1 to 11 The sizes of the one or more first sensor electrodes 100a to 100d and the one or more second sensor electrodes 102a to 102d are examples. The sizes of the one or more first sensor electrodes 100a to 100d and the one or more second sensor electrodes 102a to 102d can be appropriately changed according to the application.

[0137] Furthermore, in the antenna 20c, one or more first antenna electrodes 200 may be provided on the second principal surface SF2c of the dielectric layer.

[0138] Furthermore, in the antenna device 1c, the sensor 10c includes an electrode (sensor first electrode 103) that functions as a ground for the patch antenna. However, this does not necessarily have to be the case. For example, in the antenna device 1c, instead of the sensor 10c including an electrode that functions as a ground for the patch antenna, the antenna 20c may include an electrode that functions as a ground for the patch antenna.

[0139] Furthermore, the uniaxial stretching direction OD of the piezoelectric film 101 does not necessarily need 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. Consequently, in antenna devices 1, 1a, 1d, and 1a-1d in which electrodes are provided at corners of the piezoelectric film 101, the sensor 10 easily outputs a signal corresponding to the deformation of the sensor 10. In this case, the sensor 10 outputs a signal corresponding to the deformation caused by the twisting of the sensor 10.

[0140] Furthermore, the first sensor electrode 100a need not be formed on the first main surface SF1 of the piezoelectric film using an adhesive such as OCA. The first sensor 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 first sensor electrodes 100b, 100c, and 100d.

[0141] Furthermore, the second sensor electrode 102a need not be formed on the piezoelectric film second main surface SF2 using 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 piezoelectric film second main surface SF2. The same applies to the second sensor electrodes 102b, 102c, and 102d.

[0142] The present invention has the following structure. (1)

[0144] An antenna device, wherein:

[0145] The antenna device includes: a sensor including one or more first sensor electrodes, one or more second sensor electrodes, and a piezoelectric film; and

[0146] An antenna comprising one or more first antenna electrodes and second antenna electrodes,

[0147] The piezoelectric film has a first main surface and a second main surface.

[0148] The first main surface of the piezoelectric film and the second main surface of the piezoelectric film are arranged in sequence along the first direction,

[0149] The one or more first sensor electrodes are provided on the first main surface of the piezoelectric film.

[0150] The one or more second sensor electrodes are provided on the second main surface of the piezoelectric film.

[0151] The one or more first antenna electrodes are each provided on the first main surface of the piezoelectric film.

[0152] Each of the one or more first antenna electrodes does not overlap with the one or more first sensor electrodes and the one or more second sensor electrodes when viewed along the first direction. (2)

[0154] The antenna device according to (1), wherein

[0155] The second antenna electrode is provided on the second main surface of the piezoelectric film. (3)

[0157] The antenna device according to (1) or (2), wherein

[0158] Each of the one or more first sensor electrodes is a reference electrode connected to a reference potential.

[0159] The one or more second sensor electrodes are each a signal electrode. (4)

[0161] The antenna device according to any one of (1) to (3), wherein

[0162] The second antenna electrode is a reference electrode connected to a reference potential. (5)

[0164] The antenna device according to any one of (1) to (4), wherein

[0165] Each of the one or more second sensor electrodes is located within an outer edge of the one or more first sensor electrodes when viewed along the first direction. (6)

[0167] The antenna device according to (5), wherein

[0168] The shortest distance between each of the one or more first sensor electrodes and the one or more first antenna electrodes is shorter than the shortest distance between each of the one or more first sensor electrodes and the one or more second sensor electrodes. (7)

[0170] An antenna device, wherein:

[0171] The antenna device includes: a sensor including a first sensor electrode, one or more second electrodes, and a piezoelectric film;

[0172] An antenna comprising one or more first antenna electrodes; and

[0173] a dielectric layer having dielectric properties,

[0174] The piezoelectric film has a first main surface and a second main surface.

[0175] The first main surface of the piezoelectric film and the second main surface of the piezoelectric film are arranged in sequence along the first direction,

[0176] The first sensor electrode is provided on the first main surface of the piezoelectric film.

[0177] The one or more second sensor electrodes are each provided on the second main surface of the piezoelectric film.

[0178] The second direction is the opposite direction of the first direction,

[0179] The dielectric layer is located closer to the second direction than the first sensor electrode.

[0180] The dielectric layer has a first main surface and a second main surface arranged along the first direction.

[0181] The one or more first antenna electrodes are each provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer. (8)

[0183] The antenna device according to any one of (1) to (7), wherein

[0184] Each of the one or more first antenna electrodes radiates or receives a second signal. (9)

[0186] The antenna device according to (8), wherein

[0187] The one or more first antenna electrodes include a first radiation electrode and a second radiation electrode.

[0188] The frequency of the second signal radiated or received by the first radiation electrode is different from the frequency of the second signal radiated or received by the second radiation electrode. (10)

[0190] The antenna device according to (8) to (9), wherein:

[0191] The antenna device further includes an operating circuit,

[0192] The first main surface of the piezoelectric film includes a first region and a second region.

[0193] The third direction is a direction orthogonal to the first direction.

[0194] The fourth direction is a direction orthogonal to the first direction and the third direction.

[0195] The fifth direction is the opposite direction of the fourth direction.

[0196] When viewed along the first direction, the first region is located closer to the fourth direction than a first straight line extending along the third direction.

[0197] When viewed along the first direction, the second region is located closer to the fifth direction side than the first straight line.

[0198] The arithmetic circuit determines whether the first region is deformed or the second region is deformed based on the second signal. (11)

[0200] The antenna device according to (10), wherein

[0201] When the arithmetic circuit determines that the first region is deformed, one or more first antenna electrodes located in the first region among the one or more first antenna electrodes stop radiating the second signal or stop receiving the second signal.

[0202] When the arithmetic circuit determines that the second region is deformed, one or more antenna first electrodes located in the second region among the one or more antenna first electrodes stop radiating the second signal or stop receiving the second signal. (12)

[0204] The antenna device according to any one of (1) to (11), wherein

[0205] The sensor comprises four or more first sensor electrodes,

[0206] The first main surface of the piezoelectric film includes a central region,

[0207] The central region is surrounded by a plurality of straight lines connecting the centers of gravity of the four or more first sensor electrodes when viewed along the first direction.

[0208] All of the one or more first antenna electrodes are located in the central region when viewed along the first direction. (13)

[0210] An electronic device, wherein

[0211] The electronic device includes:

[0212] The antenna device according to any one of (1) to (12); and

[0213] monitor,

[0214] The display is located closer to the first direction side than the one or more second sensor electrodes. (14)

[0216] An electronic device, wherein

[0217] The electronic device includes:

[0218] (12) The antenna device described; and

[0219] monitor,

[0220] The display is located closer to the first direction than the one or more second sensor electrodes.

[0221] The display is located in the central area when viewed along the first direction,

[0222] All of the one or more first antenna electrodes are located within an outer edge of the display when viewed along the first direction. (15)

[0224] An electronic device, wherein

[0225] The electronic device includes:

[0226] The antenna device according to any one of (1) to (14); and

[0227] Protective film layer,

[0228] The second direction is the opposite direction of the first direction,

[0229] The protective film layer is located closer to the second direction side than the one or more first sensor electrodes and the one or more first antenna electrodes.

[0230] Description of Reference Numerals

[0231] 1. 1a to 1d: antenna device; 10, 10c: sensor; 100a to 100d, 100a2 to 100d2, 103: first electrode of sensor; 101: piezoelectric film; 102a to 102d: second electrode of sensor; 20, 20c: antenna; 200: first electrode of antenna; 201: second electrode of antenna; SF1: first main surface of piezoelectric film; SF2: second main surface of piezoelectric film.

Claims

1. An antenna device, wherein: The antenna device comprises: A sensor comprising one or more first sensor electrodes, one or more second sensor electrodes, and a piezoelectric film; and An antenna comprising one or more first antenna electrodes and second antenna electrodes, The piezoelectric film has a first main surface and a second main surface. The first main surface of the piezoelectric film and the second main surface of the piezoelectric film are arranged in sequence along the first direction, The one or more first sensor electrodes are provided on the first main surface of the piezoelectric film. The one or more second sensor electrodes are provided on the second main surface of the piezoelectric film. The one or more first antenna electrodes are each provided on the first main surface of the piezoelectric film. Each of the one or more first antenna electrodes does not overlap with the one or more first sensor electrodes and the one or more second sensor electrodes when viewed along the first direction.

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

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

4. The antenna device according to any one of claims 1 to 3, wherein The second antenna electrode is a reference electrode connected to a reference potential.

5. The antenna device according to any one of claims 1 to 4, wherein Each of the one or more second sensor electrodes is located within an outer edge of the one or more first sensor electrodes when viewed along the first direction. The antenna device according to claim 5 , wherein: The shortest distance between each of the one or more first sensor electrodes and the one or more first antenna electrodes is shorter than the shortest distance between each of the one or more first sensor electrodes and the one or more second sensor electrodes.

7. An antenna device, wherein: The antenna device comprises: A sensor comprising a first sensor electrode, one or more second electrodes, and a piezoelectric film; An antenna comprising one or more first antenna electrodes; and a dielectric layer having dielectric properties, The piezoelectric film has a first main surface and a second main surface. The first main surface of the piezoelectric film and the second main surface of the piezoelectric film are arranged in sequence along the first direction, The first sensor electrode is provided on the first main surface of the piezoelectric film. The one or more second sensor electrodes are each provided on the second main surface of the piezoelectric film. The second direction is the opposite direction of the first direction, The dielectric layer is located closer to the second direction than the first sensor electrode. The dielectric layer has a first main surface and a second main surface of the dielectric layer arranged in sequence along the first direction. The one or more first antenna electrodes are each provided on the first main surface of the dielectric layer or the second main surface of the dielectric layer.

8. The antenna device according to any one of claims 1 to 7, wherein: Each of the one or more first antenna electrodes radiates or receives a second signal.

9. The antenna device according to claim 8, wherein: The one or more first antenna electrodes include a first radiation electrode and a second radiation electrode. The frequency of the second signal radiated or received by the first radiation electrode is different from the frequency of the second signal radiated or received by the second radiation electrode.

10. The antenna device according to claim 8 or 9, wherein: The antenna device further includes an operating circuit, The first main surface of the piezoelectric film includes a first region and a second region. The third direction is a direction orthogonal to the first direction. The fourth direction is a direction orthogonal to the first direction and the third direction. The fifth direction is the opposite direction of the fourth direction. When viewed along the first direction, the first region is located closer to the fourth direction than a first straight line extending along the third direction. When viewed along the first direction, the second region is located closer to the fifth direction side than the first straight line. The arithmetic circuit determines whether the first region is deformed or the second region is deformed based on the second signal. The antenna device according to claim 10 , wherein: When the arithmetic circuit determines that the first region is deformed, one or more first antenna electrodes located in the first region among the one or more first antenna electrodes stop radiating the second signal or stop receiving the second signal. When the arithmetic circuit determines that the second region is deformed, one or more antenna first electrodes located in the second region among the one or more antenna first electrodes stop radiating the second signal or stop receiving the second signal.

12. The antenna device according to any one of claims 1 to 11, wherein: The sensor comprises four or more first sensor electrodes, The first main 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 first sensor electrodes when viewed along the first direction. All of the one or more first antenna electrodes are located in the central region when viewed along the first direction.

13. An electronic device, wherein: The electronic device includes: The antenna device according to any one of claims 1 to 12; and monitor, The display is located closer to the first direction side than the one or more second sensor electrodes.

14. An electronic device, wherein: The electronic device includes: The antenna device according to claim 12; and monitor, The display is located closer to the first direction than the one or more second sensor electrodes. The display is located in the central area when viewed along the first direction, All of the one or more first antenna electrodes are located within an outer edge of the display when viewed along the first direction.

15. An electronic device, wherein: The electronic device includes: The antenna device according to any one of claims 1 to 14; and Protective film layer, The second direction is the opposite direction of the first direction, The protective film layer is located closer to the second direction side than the one or more first sensor electrodes and the one or more first antenna electrodes.

Images