JP6798328B2 - Communication device - Google Patents

Description

The present invention relates to a communication device that performs wireless communication.

In recent years, communication devices for wireless communication that can be attached to the human body or articles have been developed. For example, Patent Document 1 discloses a wireless module used in an RFID (Radio Frequency Identifier) system. Further, for example, Patent Document 2 discloses an antenna device used for a small wireless device.

Japanese Unexamined Patent Publication No. 2012-209970 International Publication No. 2015/182016

Such communication devices are desired to be small in size, and are expected to be further reduced in size.

It is desirable to provide a communication device that can be reduced in size.

The first communication device of the present invention includes a first conductor, a second conductor, a third conductor, a first connecting conductor, a second connecting conductor, an RF circuit, and a battery. ing. The first conductor and the second conductor each have a main surface and an end portion, and are arranged side by side so that the end portions face each other in the first direction. The third conductor has a main surface of the first conductor and a main surface facing the main surface of the second conductor. The first connecting conductor is connected at a position separated from the end of the first conductor by a predetermined distance in the first direction, and connects the first conductor and the third conductor. The second connecting conductor is connected at a position separated from the end portion of the second conductor by a predetermined distance in the first direction, and connects the second conductor and the third conductor. The RF circuit is arranged in the first direction on the side where the first conductor is provided when viewed from the end of the first conductor, and the power supply terminal, the reference potential terminal, the end of the first conductor, and the first conductor. It has an RF signal terminal connected to the second conductor via an RF signal transmission line arranged so as to straddle the end of the second conductor. The battery has an anode terminal and a cathode terminal, and the first terminal, which is one of the anode terminal and the cathode terminal, is a first conductor, a second conductor, a third conductor, a first connecting conductor, and the like. And is connected to the reference potential terminal via one or more conductors of the second connecting conductor, and the second terminal, which is the other of the anode terminal and the cathode terminal, is connected to the power supply terminal via the power supply line. It was done.

The second communication device of the present invention includes a first conductor, a second conductor, a third conductor, a first connecting conductor, a second connecting conductor, an RF circuit, and a battery socket. I have. The first conductor and the second conductor each have a main surface and an end portion, and are arranged side by side so that the end portions face each other in the first direction. The third conductor has a main surface of the first conductor and a main surface facing the main surface of the second conductor. The first connecting conductor is connected at a position separated from the end of the first conductor by a predetermined distance in the first direction, and connects the first conductor and the third conductor. The second connecting conductor is connected at a position separated from the end portion of the second conductor by a predetermined distance in the first direction, and connects the second conductor and the third conductor. The RF circuit is arranged in the first direction on the side where the first conductor is provided when viewed from the end of the first conductor, and the power supply terminal connected to the power supply line, the first conductor, and the second conductor. Is connected to the first terminal of one of the anode terminal and the cathode terminal of the battery via one or more conductors of the conductor, the third conductor, the first connecting conductor, and the second connecting conductor. It has a reference potential terminal to be used and an RF signal terminal connected to the second conductor via an RF signal transmission line arranged so as to straddle the end of the first conductor and the end of the second conductor. It is a thing. The battery socket is capable of fixing the battery, and the second terminal, which is the other of the anode terminal and the cathode terminal, can be connected to the power supply line.

According to the first and second communication devices of the present invention, the ends of the first conductor and the ends of the second conductor are opposed to each other, and the RF circuit is placed in the first direction in the first direction. Since it is arranged on the side where the first conductor is provided when viewed from the end of the conductor, the size can be reduced.

It is a block diagram which shows one structural example of the communication system which applied the communication device which concerns on one Embodiment of this invention. It is a perspective view which shows one configuration example of the communication device which concerns on 1st Embodiment. It is a front view which shows one configuration example of the communication device shown in FIG. It is a perspective view which shows one structural example of the communication device which concerns on one specific example of 1st Embodiment. It is a front view which shows one configuration example of the communication device shown in FIG. It is a top view which shows one structural example of the pattern formed on the substrate surface of the communication device shown in FIG. It is sectional drawing which shows one configuration example of the communication device shown in FIG. It is another cross-sectional view which shows one configuration example of the communication device shown in FIG. It is explanatory drawing which shows one characteristic example of the communication device shown in FIG. It is explanatory drawing which shows the other characteristic example of the communication device shown in FIG. It is a perspective view which shows one configuration example of the communication device which concerns on the modification of the 1st Embodiment. It is a perspective view which shows one configuration example of the communication device which concerns on 2nd Embodiment. It is a front view which shows one configuration example of the communication device shown in FIG. It is a top view which shows one structural example of the pattern formed on the substrate surface of the communication device shown in FIG. It is explanatory drawing which shows the arrangement example of the induction element and the pattern wiring shown in FIG. It is explanatory drawing which shows the other arrangement example of the induction element and the pattern wiring shown in FIG. It is explanatory drawing which shows the other arrangement example of the induction element and the pattern wiring shown in FIG. It is explanatory drawing which shows the other arrangement example of the induction element and the pattern wiring shown in FIG. It is a perspective view which shows one configuration example of the communication device which concerns on 3rd Embodiment. It is a front view which shows one configuration example of the communication device shown in FIG. It is a front view which shows one configuration example of the communication device which concerns on one specific example of the 3rd Embodiment. It is a top view which shows one structural example of the pattern formed on the substrate surface of the communication device shown in FIG. It is a perspective view which shows one configuration example of the communication device which concerns on 4th Embodiment. It is a front view which shows one configuration example of the communication device shown in FIG. It is a top view which shows one configuration example of the communication device shown in FIG. It is a front view which shows one configuration example of the communication device which concerns on one specific example of the 4th Embodiment. It is a perspective view which shows one configuration example of the communication device which concerns on 5th Embodiment. It is a front view which shows one configuration example of the communication device shown in FIG. It is a top view which shows one structural example of the pattern formed on the substrate surface of the communication device shown in FIG. It is sectional drawing which shows one configuration example of the communication device shown in FIG. It is a perspective view which shows one configuration example of the communication device which concerns on 6th Embodiment. It is a front view which shows one configuration example of the communication device shown in FIG. FIG. 5 is a plan view showing a configuration example of a pattern formed on the substrate surface of the communication device shown in FIG. 25. It is sectional drawing which shows one configuration example of the communication device shown in FIG. It is a front view which shows one configuration example of the communication device which concerns on the modification. FIG. 8 is a plan view showing a configuration example of a pattern formed on the substrate surface of the communication device shown in FIG. 28. It is a perspective view which shows one configuration example of the communication device which concerns on another modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The explanation will be given in the following order.
1. 1. First Embodiment 2. Second embodiment (example in which an induction element is provided in the power supply line)
3. 3. Third embodiment (example in which the power supply line is arranged along the antenna)
4. Fourth Embodiment (Example in which the RF circuit and the battery are provided in the space surrounded by the antenna)
5. Fifth Embodiment (Example in which one of the RF circuit and the battery is provided in the space surrounded by the antenna)

<1. First Embodiment>
[Configuration example]
FIG. 1 shows a configuration example of a communication system (communication system 100) in which the communication device according to the first embodiment of the present invention is used. The communication system 100 acquires information from a communication device attached to a human body or an article, and manages this information. The communication system 100 includes a plurality of communication devices 101 (two communication devices 101A and 101B in this example), a plurality of hub devices 102 (two hub devices 102A and 102B in this example), and a server device 103. There is.

The communication device 101 is a device that performs wireless communication with the hub device 102, and is a small device that can be attached to a human body or an article. The communication device 101 communicates with the hub device 102 by using a communication standard capable of realizing low power consumption such as BLE (Bluetooth (registered trademark) Low Energy). For example, the communication device 101 may store identification information unique to the communication device 101 for distinguishing a plurality of communication devices 101 from each other, and transmit this identification information to the hub device 102. Further, when the communication device 101 is attached to a human body, for example, the communication device 101 may detect biological information such as body temperature and pulse and transmit the biological information to the hub device 102.

The hub device 102 performs wireless communication with the communication device 101. The hub device 102 communicates with the communication device 101 using a communication standard capable of realizing low power consumption, such as BLE. Further, the hub device 102 also has a function of communicating with the server device 103 using, for example, a wireless LAN (Local Area Network). The hub device 102 is not limited to this, and the hub device 102 may communicate with the server device 103 using, for example, a wired LAN. Further, the hub device 102 also has a function of detecting RSSI (Received Signal Strength Indication) when receiving a signal transmitted from the communication device 101 and supplying the detection result to the server device 103.

The server device 103 manages the information acquired from the communication device 101. The server device 103 acquires information transmitted from the communication device 101 and manages the information by communicating with the hub device 102 using, for example, a wireless LAN.

With this configuration, in the communication system 100, for example, the communication device 101 periodically transmits a beacon signal. The hub device 102 receives the beacon signal, and supplies the reception result of the beacon signal and the detection result of RSSI to the server device 103. As a result, the server device 103 can acquire various information such as biological information from the communication device 101 and can grasp the position of the communication device 101, for example.

FIG. 2 shows a configuration example of the communication device 1 applied to the communication device 101. FIG. 3 shows an example of a front view of the communication device 1 as viewed from the Y direction in FIG. The communication device 1 includes conductors 11 to 13, connecting conductors 14 and 15, a substrate 16, an RF (Radio Frequency) circuit 17, and a battery 18.

Conductors 11 to 13 and connecting conductors 14 and 15 constitute an antenna 10. The conductors 11 to 13 and the connecting conductors 14 and 15 can be integrally formed by, for example, processing a sheet metal.

The conductors 11 and 12 are plate-shaped conductors extending in the XY plane. The conductors 11 and 12 are arranged side by side in the X direction. As shown in FIG. 3, the conductor 11 has a main surface 11A and an end portion 11C, and the conductor 12 has a main surface 12A and an end portion 12C.

The main surface 11A of the conductor 11 faces the conductor 13. The end portion 11C of the conductor 11 faces the end portion 12C of the conductor 12 at a predetermined distance. That is, the conductor 11 and the conductor 12 are arranged side by side so that the end portions 11C and the end portions 12C face each other in the X direction. As a result, a gap G is formed at a position where the end portion 11C and the end portion 12C face each other. In this example, the conductor 11 is in contact with the substrate 16 and is connected to the reference potential terminal 17B (described later) of the RF circuit 17 via a via provided on the substrate 16. The conductor 11 is connected to the connecting conductor 14 at a position separated from the end portion 11C of the conductor 11 by a predetermined distance in the X direction.

The main surface 12A of the conductor 12 faces the conductor 13. The end portion 12C of the conductor 12 faces the end portion 11C of the conductor 11. In this example, the conductor 12 is in contact with the substrate 16 and is connected to the RF signal terminal 17C (described later) of the RF circuit 17 via a via provided on the substrate 16. Further, the conductor 12 is connected to the cathode terminal 18B (described later) of the battery 18 via another via provided on the substrate 16. The conductor 12 is connected to the connecting conductor 15 at a position separated from the end portion 12C of the conductor 12 by a predetermined distance in the X direction. In the X direction, the distance from the end 12C of the conductor 12 to the position connected to the connecting conductor 15 is substantially equal to the distance from the end 11C of the conductor 11 to the position connected to the connecting conductor 14.

The conductor 13 is a plate-shaped conductor that extends in the XY plane. The conductor 13 has a main surface 13A. The main surface 13A of the conductor 13 faces the main surface 11A of the conductor 11 and faces the main surface 12A of the conductor 12. The outer shape of the conductor 13 on the XY plane is substantially the same as the outer shape of the total region of the conductors 11 and 12 in the XY plane. One end of the conductor 13 in the longitudinal direction (X direction) is connected to the connecting conductor 14, and the other end is connected to the connecting conductor 15.

The connecting conductors 14 and 15 are plate-shaped conductors extending in the YZ plane. The connecting conductor 14 connects the conductor 11 and the conductor 13. The connecting conductor 14 is connected at a position separated from the end 11C of the conductor 11 by a predetermined distance in the X direction, and is also connected to one end of the conductor 13. The connecting conductor 15 connects the conductor 12 and the conductor 13. The connecting conductor 15 is connected at a position separated from the end portion 12C of the conductor 12 by a predetermined distance in the X direction, and is also connected to the other end of the conductor 13.

With this configuration, the antenna 10 has a shape like the alphabet "C" extending from the conductor 11 to the conductor 12 via the connecting conductor 14, the conductor 13, and the connecting conductor 15. In the communication device 1, an RF signal is applied to the conductor 12 with reference to the potential of the conductor 11. The total length (antenna length) of the antenna 10 from the end portion 11C of the conductor 11 to the end portion 12C of the conductor 12 is designed so that the electrical length of the antenna 10 is equal to half (λ / 2) of the wavelength λ of this RF signal. Has been done.

The substrate 16 is an insulating substrate on which the RF circuit 17 and the battery 18 are mounted. The substrate surface 16A of the substrate 16 is in contact with the conductor 11 and the conductor 12. Further, on the substrate surface 16B of the substrate 16, the RF circuit 17 is mounted in a region on the side where the conductor 11 is provided (hereinafter, also referred to as a region corresponding to the conductor 11) when viewed from the end portion 11C of the conductor 11 in the X direction. At the same time, the battery 18 is mounted in a region on the side where the conductor 12 is provided (hereinafter, also referred to as a region corresponding to the conductor 12) when viewed from the end portion 12C of the conductor 12 in the X direction. The "region on the side where the conductor 11 is provided when viewed from the end portion 11C of the conductor 11 in the X direction" is, for example, the conductor 11 when viewed from the Z direction (the direction perpendicular to the main surface 11A of the conductor 11). Includes the area indicated by the outer shape. Similarly, the "region on the side where the conductor 12 is provided when viewed from the end portion 12C of the conductor 12 in the X direction" is, for example, when viewed from the Z direction (the direction perpendicular to the main surface 12A of the conductor 12). The region indicated by the outer shape of the conductor 12 is included.

The RF circuit 17 is a circuit that generates an RF signal, and in this example, it is sealed in a surface mount type package. The RF circuit 17 is mounted in a region corresponding to the conductor 11 on the substrate surface 16B of the substrate 16. In other words, the RF circuit 17 is arranged in the Z direction (direction perpendicular to the main surface 11A of the conductor 11) on the side opposite to the side on which the conductor 13 is provided when viewed from the conductor 11. The RF circuit 17 has a power supply terminal 17A, a reference potential terminal 17B, and an RF signal terminal 17C.

The power supply terminal 17A is connected to the anode terminal 18A (described later) of the battery 18 via the power supply line PL. In this example, the power supply line PL is arranged so as to straddle the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12, and the power supply terminal 17A of the RF circuit 17 and the battery 18 are connected to the end portion 11C of the conductor 11 and the battery 18. It is connected across the end 12C of the conductor 12. That is, the power supply line PL is arranged so as not to be along the connecting conductor 14 and the connecting conductor 15. In other words, the power supply line PL straddles the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12 at a position closer to the conductor 11 and the conductor 12 than the conductor 13. As a result, in the communication device 1, the RF circuit 17 and the battery 18 can be connected at a short distance. Further, by connecting in this way, the configuration can be simplified, and as a result, the communication device 1 can be easily manufactured. The reference potential terminal 17B is connected to the conductor 11 via a via provided on the substrate 16. That is, the reference potential terminal 17B is connected to the cathode terminal 18B (described later) of the battery 18 via the antenna 10.

The RF signal terminal 17C is connected to the conductor 12 via the RF signal transmission line RFL. The RF signal transmission line RFL is configured by using a transmission line having a predetermined characteristic impedance (for example, 50 ohms) and vias provided on the substrate 16. The RF signal transmission line RFL is arranged so as to straddle the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12, and the RF signal terminal 17C and the conductor 12 of the RF circuit 17 are connected to the end portion 11C of the conductor 11 and the conductor. It is connected across the end 12C of 12. It is desirable that the RF circuit 17 be mounted at a position close to the conductor 12. Thereby, the length of the RF signal transmission line RFL can be shortened.

The battery 18 supplies electric power to the RF circuit 17, and is configured by using, for example, a coin battery. The battery 18 is mounted in a region corresponding to the conductor 12 on the substrate surface 16B of the substrate 16. In other words, the battery 18 is arranged in the Z direction (direction perpendicular to the main surface 12A of the conductor 12) on the side opposite to the side on which the conductor 13 is provided when viewed from the conductor 12. The battery 18 has an anode terminal 18A and a cathode terminal 18B. The anode terminal 18A is connected to the power supply terminal 17A of the RF circuit 17 via the power supply line PL. The cathode terminal 18B is connected to the conductor 12 via a via provided on the substrate 16.

FIG. 4 shows an example of the communication device 1A according to a specific example of the communication device 1. FIG. 5 shows an example of a front view of the communication device 1A seen from the Y direction in FIG. In this example, conductors 11 and 12, power supply line PL, and RF signal transmission line RFL are configured by using a printed circuit board capable of forming a pattern on both sides. The communication device 1A has a battery socket BS. The battery socket BS fixes the battery 18 and connects the anode terminal 18A of the battery 18 and the power supply line PL. The battery socket BS is mounted in a region corresponding to the conductor 12 on the substrate surface 16B of the substrate 16.

The conductor 11 includes conductors 111 and 112. As shown in FIG. 5, the main surface 11A of the conductor 11 is the main surface of the conductor 111, and the end portion 11C of the conductor 11 is the end portion of the conductors 111 and 112. The conductor 111 is formed on the entire surface of the substrate surface 16A of the substrate 16 on the side where the conductor 11 is provided when viewed from the end portion 11C of the conductor 11 in the X direction. The conductor 112 is the RF circuit 17, the RF signal transmission line RFL, and the power supply in the region of the substrate surface 16B of the substrate 16 on the side where the conductor 11 is provided when viewed from the end portion 11C of the conductor 11 in the X direction. It is mainly formed in a region other than the region where the line PL is provided. The conductor 111 and the conductor 112 are connected to each other via a via V provided on the substrate 16.

The conductor 12 includes conductors 121 and 122. As shown in FIG. 5, the main surface 12A of the conductor 12 is the main surface of the conductor 121, and the end portion 12C of the conductor 12 is the end portion of the conductors 121 and 122. The conductor 121 is formed on the entire surface of the substrate surface 16A of the substrate 16 on the side where the conductor 12 is provided when viewed from the end portion 12C of the conductor 12 in the X direction. The conductor 122 is located in a region of the substrate surface 16B of the substrate 16 on the side where the conductor 12 is provided when viewed from the end 12C of the conductor 12 in the X direction, other than the region where the power supply line PL is provided. It is mainly formed. The conductor 121 and the conductor 122 are connected to each other via a via V provided on the substrate 16.

The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL and the battery socket BS, the reference potential terminal 17B is connected to the conductor 112, and the RF signal terminal 17C is the RF signal transmission line RFL. It is connected to the conductor 122 via. The anode terminal 18A of the battery 18 is connected to the power supply terminal 17A of the RF circuit 17 via the battery socket BS and the power supply line PL, and the cathode terminal 18B is connected to the conductor 122.

The power supply line PL is arranged on the substrate surface 16B of the substrate 16 so as to straddle the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12, and the power supply terminal 17A of the RF circuit 17 and the battery socket BS are connected to the conductor 11. The end 11C and the end 12C of the conductor 12 are straddled and connected.

The RF signal transmission line RFL is arranged on the substrate surface 16B of the substrate 16 so as to straddle the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12, and uses a transmission line having a predetermined characteristic impedance (for example, 50 ohms). It is configured. The RF signal transmission line RFL connects the RF signal terminal 17C of the RF circuit 17 and the conductor 122 across the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12.

The connecting conductor 14 includes a conductor 14A and a conductor 14B. The conductor 14A is a plate-shaped conductor that extends in the YZ plane. The conductor 14B is a plate-shaped conductor that extends in the XY plane, and connects the conductor 14A to the conductor 111 of the conductor 11. Similarly, the connecting conductor 15 includes a conductor 15A and a conductor 15B. The conductor 15A is a plate-shaped conductor extending in the YZ plane. The conductor 15B is a plate-shaped conductor that extends in the XY plane, and connects the conductor 15A to the conductor 121 of the conductor 12.

In the communication device 1A, the connecting conductors 14, 15 and the conductor 13 can be integrally formed by, for example, processing a sheet metal.

FIG. 6A shows an example of a pattern formed on the substrate surface 16B. FIG. 6B shows a cross-sectional view taken along the line I-I in FIG. 6A, and FIG. 6C shows II-II in FIG. 6A.
It represents a cross-sectional view in the direction of the arrow. In this example, the power supply terminal 17A, the reference potential terminal 17B, and the RF signal terminal 17C are formed on the bottom surface of the RF circuit 17. Further, a pattern corresponding to these three terminals is formed in a region on the substrate surface 16B of the substrate 16 on which the RF circuit 17 is mounted. The RF circuit 17 is implemented so that the power supply terminal 17A, the reference potential terminal 17B, and the RF signal terminal 17C are connected to these patterns, respectively. As a result, the power supply terminal 17A of the RF circuit 17 is connected to the power supply line PL, the reference potential terminal 17B is connected to the conductor 112 of the conductor 11, and the RF signal terminal 17C is connected to the RF signal transmission line RFL. ing.

Here, the conductor 11 corresponds to a specific example of the "first conductor" in the present disclosure. The conductor 12 corresponds to a specific example of the "second conductor" in the present disclosure. The conductor 13 corresponds to a specific example of the "third conductor" in the present disclosure. The connecting conductor 14 corresponds to a specific example of the "first connecting conductor" in the present disclosure. The connecting conductor 15 corresponds to a specific example of the “second connecting conductor” in the present disclosure.

[Operation and action]
Next, the operation and operation of the communication system 100 of the present embodiment will be described.

(Overview of overall operation)
First, the operation of the communication system 100 will be described with reference to FIGS. The battery 18 of the communication device 1 supplies a power supply voltage to the power supply terminal 17A of the RF circuit 17 via the power supply line PL. The RF circuit 17 applies an RF signal to the conductor 12 via the RF signal transmission line RFL with reference to the potential of the conductor 11. As a result, the antenna 10 radiates electromagnetic waves. In this way, for example, when the communication device 1 periodically transmits a beacon signal, the hub device 102 receives the beacon signal and supplies the reception result of the beacon signal and the detection result of RSSI to the server device 103. .. As a result, the server device 103 acquires various information such as biological information from the communication device 1, and grasps the position of the communication device 1, for example.

(Detailed operation)
Next, the operation of the communication device 1 will be described in detail. The RF circuit 17 applies an RF signal to the conductor 12 with reference to the potential of the conductor 11. The total length (antenna length) of the antenna 10 from the end portion 11C of the conductor 11 to the end portion 12C of the conductor 12 via the connecting conductor 14, the conductor 13, and the connecting conductor 15 is such that the electrical length of the antenna 10 is the wavelength λ of this RF signal. It is designed to be equal to half (λ / 2) of. As a result, resonance occurs in the antenna 10.

FIG. 7 schematically shows the electric field strength distribution at each position of the antenna 10 from the end portion 11C of the conductor 11 to the end portion 12C of the conductor 12. In FIG. 7, the left end shows the electric field strength at the end 11C of the conductor 11, the center shows the electric field strength near the center of the conductor 13, and the right end shows the electric field strength at the end 12C of the conductor 12. When resonance occurs in the antenna 10, as shown in FIG. 7, the end 11C of the conductor 11 and the end 12C of the conductor 12 correspond to the antinode of the electric field, and the vicinity of the center of the conductor 13 corresponds to the node of the electric field. .. This behavior is similar to that of a half-wave dipole antenna. The antenna 10 is formed by bending a half-wave dipole antenna into a shape like the letter “C”. Due to such a bent shape, the communication device 1 can shorten the length of the communication device 1 in the longitudinal direction while realizing almost the same antenna length as the half-wave dipole antenna, and reduce the size of the communication device 1. can do.

FIG. 8 shows an example of electric lines of force generated around the antenna 10. As shown in FIG. 7, the end 11C of the conductor 11 and the end 12C of the conductor 12 correspond to the antinodes of the electric field. That is, the electric field becomes stronger near the end 11C of the conductor 11 and near the end 12C of the conductor 12. Further, the polarity of the electric field at the end 11C of the conductor 11 is different from the polarity of the electric field at the end 12C of the conductor 12. Therefore, as shown in FIG. 8, many lines of electric force are concentrated between the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12. Then, as the distance from the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12 increases, the electric field strength becomes weaker as shown in FIG. 7, so that the number of electric lines of force also decreases.

As described above, in the communication device 1, since the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12 are made to face each other, it is possible to easily radiate the radio wave to the external space, and the radiation efficiency of the radio wave can be improved. Can be enhanced. That is, for example, in a configuration such as an inverted L-shaped antenna, the antenna conductor on the anode side and the ground conductor on the cathode side corresponding to the antinodes of the electric field are parallel to each other and face each other. Therefore, for example, if the inverted L-shaped antenna is made thin, the electric field is concentrated in the space between the two conductors like a so-called parallel plate capacitor, so that it becomes difficult to radiate radio waves to the external space. On the other hand, in the communication device 1, the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12 are made to face each other. In other words, for example, the main surface 11A of the conductor 11 and the main surface 12A of the conductor 12 are prevented from facing each other. As a result, as shown in FIG. 8, even when the antenna 10 is thinned, an electric field is formed in the external space, so that the radiation efficiency of radio waves can be improved.

When the communication device 1 is attached to the surface of a human body or, for example, the surface of a container containing a liquid, the conductor 13 is located near the human body or the container as shown in FIG. 8, and the conductors 11 and 12 It is desirable to attach it so that it is located far from the human body and the container. That is, as shown in FIGS. 7 and 8, in the communication device 1, since the electric field strength is strong in the vicinity of the conductors 11 and 12, radio waves are likely to be radiated into the space on the side of the conductors 11 and 12. On the other hand, since the electric field strength is weak in the vicinity of the conductor 13, radio waves are unlikely to be radiated into the space on the side of the conductor 13. In other words, the conductor 13 functions as a shield conductor. In this way, radio waves are unlikely to be radiated into the space on the side of the conductor 13, so that the conductor 13 is located near the human body or the container, and the conductors 11 and 12 are located far from the human body or the container. By pasting, it becomes difficult for radio waves to be radiated to the human body or liquid. As a result, in the communication device 1, the loss due to the radio wave being absorbed by the human body or the liquid is suppressed, so that the radiation efficiency of the radio wave can be improved.

Further, in the communication device 1, as shown in FIG. 8, since the electric lines of force are mainly generated between the conductor 11 and the conductor 12, the component of the electric field in the X direction is large. That is, for example, when the communication device 1 is attached so that the conductor 13 is located near the human body or the container and the conductors 11 and 12 are located far from the human body or the container, the radio wave is transmitted to the surface of the human body or the container. It is strongly radiated in the direction parallel to the surface (X direction). As a result, it is possible to increase the amount of radio waves that wrap around in the space on the side of the conductor 13 farther than the human body or the container. In this way, the communication device 1 can radiate radio waves in various directions. That is, for example, in a configuration such as an inverted L-shaped antenna, when the ground conductor is located near the human body, radio waves are strongly radiated in a direction perpendicular to the surface of the human body. Therefore, in this case, since the radio waves are absorbed by the human body, the amount of radio waves in a space farther than the human body is reduced. On the other hand, in the communication device 1, radio waves are strongly radiated in a direction parallel to the surface of the human body and the surface of the container, so that the amount of radio waves that wrap around in a space farther than the human body can be increased. Therefore, the communication device 1 can radiate radio waves in various directions. As a result, for example, when the hub device 102 detects RSSI based on the radio wave transmitted from the communication device 1, and the server device 103 detects the position of the communication device 1 based on the detection result of the RSSI. The detection accuracy of the position can be improved.

In particular, in the communication device 1, the configuration of the antenna 10 is made substantially symmetrical in the X direction. Specifically, for example, the distance of the conductor 12 from the end 12C to the position connected to the connecting conductor 15 is substantially equal to the distance of the conductor 11 from the end 11C to the position connected to the connecting conductor 14. did. As a result, in the communication device 1, as shown in FIG. 8, the generated electric lines of force can be made substantially symmetrical in the X direction, so that radio waves can be radiated with good symmetry.

Further, in the communication device 1, the RF circuit 17 is arranged on the side where the conductor 11 is provided when viewed from the end portion 11C of the conductor 11 in the X direction (the direction in which the conductor 11 and the conductor 12 are arranged side by side), and the conductor. The battery 18 (battery socket BS) was arranged on the side where the conductor 12 was provided when viewed from the end portion 12C of the 12. Here, the “battery 18 (battery socket BS)” indicates the battery 18 in the configuration shown in FIG. 2, and the battery 18 and the battery socket BS in the configuration shown in FIG. As a result, for example, it is not necessary to separately provide a space for arranging the RF circuit 17 and the battery 18 (battery socket BS), so that the size of the communication device 1 can be reduced.

As described above, the communication device 1 can be miniaturized while increasing the radiation efficiency of radio waves.

[effect]
As described above, in the present embodiment, the conductor 11 and the conductor 12 having the end portion 12C facing the end portion 11C of the conductor 11, the main surface 11A of the conductor 11 and the main surface facing the main surface 12A of the conductor 12 Since the conductor 13 having 13A, the connecting conductor 14, and the connecting conductor 15 are provided, the size of the communication device can be reduced.

In the present embodiment, since the end 11C of the conductor 11 and the end 12C of the conductor 12 face each other, an electric field is formed in the external space, so that the radiation efficiency of radio waves can be improved. In particular, by attaching the communication device 1 so that the conductor 13 is located near the human body or the container and the conductors 11 and 12 are located far from the human body or the container, the loss due to the radio waves being absorbed by the human body or the liquid. Is suppressed, so that the radiation efficiency of radio waves can be improved. Further, when the end 11C and the end 12C face each other in this way, the radio wave is strongly radiated in a direction parallel to the surface of the human body and the surface of the container, so that the radio wave goes to a space farther than the human body. The amount of radio waves that can be received can be increased, and as a result, radio waves can be radiated in various directions.

In the present embodiment, in the X direction (direction in which the conductor 11 and the conductor 12 are arranged side by side), the RF circuit is arranged on the side where the conductor 11 is provided when viewed from the end portion 11C of the conductor 11, and the conductor 12 is arranged. Since the battery (battery socket) is arranged on the side where the conductor 12 is provided when viewed from the end portion 12C, the size of the communication device can be reduced.

[Modification 1-1]
In the above embodiment, as shown in FIGS. 2 and 4, the RF signal terminal 17C of the RF circuit 17 is directly connected to the conductor 12 via the RF signal transmission line RFL, but the present invention is not limited to this. .. Instead of this, for example, as in the communication device 1B shown in FIG. 9, the conductor 12 may be connected via the RF signal transmission line RFL1 including the transmission line RFLA and the matching circuit 19. The matching circuit 19 is inserted between the transmission line RFLA and the conductor 122 at a position where the end 11C of the conductor 11 and the end 12C of the conductor 12 face each other (the position of the gap G). Examples of the matching circuit 19 include a capacitive element and one in which a plurality of capacitive elements are connected in series or in parallel with each other.

[Modification 1-2]
In the above embodiment, as shown in FIGS. 2 and 3, the anode terminal 18A of the battery 18 is connected to the power supply terminal 17A of the RF circuit 17 via the power supply line PL, and the cathode terminal 18B is connected to the conductor 12. Connected, but not limited to this. Instead, for example, the cathode terminal 18B of the battery 18 may be connected to the power supply terminal 17A of the RF circuit 17 via the power supply line PL, and the anode terminal 18A may be connected to the conductor 12. In this case, as the RF circuit 17, for example, a circuit that operates at a negative power supply voltage can be used.

[Modification 1-3]
In the above embodiment, as shown in FIGS. 2 and 3, the RF circuit 17 is mounted in the region corresponding to the conductor 11 on the substrate surface 16B of the substrate 16 and connected to the reference potential terminal 17B of the RF circuit 17. The via (connecting wire) is connected to the conductor 11, but the present invention is not limited to this. Since the conductor 11, the conductor 12, the conductor 13, the connecting conductor 14 and the connecting conductor 15 have equal potentials in terms of direct current, for example, a connecting wire connected to the reference potential terminal 17B is used as the conductor 13. It may be connected, the connecting wire connected to the reference potential terminal 17B may be connected to the conductor 12, or the connecting wire connected to the reference potential terminal 17B may be connected to the connecting conductor 14. The connecting wire connected to the reference potential terminal 17B may be connected to the connecting conductor 15. Further, in the above embodiment, as shown in FIGS. 2 and 3, the battery 18 is mounted in the region corresponding to the conductor 12 on the substrate surface 16B of the substrate 16 and is connected to the cathode terminal 18B of the battery 18. The via (connecting wire) was connected to the conductor 12, and in the above modification 1-2, the via (connecting wire) connected to the anode terminal 18A of the battery 18 was connected to the conductor 12, but the present invention is limited to this. is not. Instead of this, for example, the connecting wire connected to the cathode terminal 18B (or the anode terminal 18A) may be connected to the conductor 13, or the connecting wire connected to the cathode terminal 18B (or the anode terminal 18A) may be connected to the conductor. The connection wire connected to the cathode terminal 18B (or the anode terminal 18A) may be connected to the connecting conductor 14, or the connection may be connected to the cathode terminal 18B (or the anode terminal 18A). The wire may be connected to the connecting conductor 15. That is, the cathode terminal 18B (or the anode terminal 18A) may be connected to the reference potential terminal 17B via one or more of the conductor 11, the conductor 12, the conductor 13, the connecting conductor 14, and the connecting conductor 15. ..

[Modification 1-4]
In the above embodiment, the RF circuit 17 and the battery 18 are mounted on the substrate 16, but the present invention is not limited to this, and various components such as a capacitance element, an induction element, a resistance element, and a matching circuit are further mounted. You may. Specifically, for example, a capacitive element may be inserted between the conductor 11 and the conductor 12 to adjust the coupling between the conductor 11 and the conductor 12.

<2. Second Embodiment>
Next, the communication device 2 according to the second embodiment will be described. In this embodiment, the connection between the power supply terminal 17A of the RF circuit 17 and the anode terminal 18A of the battery 18 is different from that of the first embodiment. The components substantially the same as the communication device (particularly the communication device 1B) according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 10 shows a configuration example of the communication device 2. FIG. 11 shows an example of a front view of the communication device 2 as viewed from the Y direction in FIG. FIG. 12 shows an example of a pattern formed on the substrate surface 16B. The communication device 2 includes an RF circuit 17, a battery 18, and capacitive elements 22 and 23.

The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL2. The power supply line PL2 includes a pattern wiring PLA2 and an induction element 21.

The pattern wiring PLA2 includes the pattern wiring PLA21 and PLA22. The pattern wiring PLA 21 is formed in a region corresponding to the conductor 11 on the substrate surface 16B of the substrate 16 and is connected to the power supply terminal 17A of the RF circuit 17. The pattern wiring PLA 22 is formed in a region corresponding to the conductor 12 on the substrate surface 16B of the substrate 16, is connected to the battery socket BS, and is connected to the anode terminal 18A of the battery 18 via the battery socket BS. ing. That is, the pattern wiring PLA2 is interrupted at a position where the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12 face each other (the position of the gap G), and is a portion of the pattern wiring PLA2 connected to the RF circuit 17. Is the pattern wiring PLA21, and the portion connected to the battery socket BS is the pattern wiring PLA22. Here, the pattern wiring PLA 21 corresponds to a specific example of the "first power supply line" in the present disclosure, and the pattern wiring PLA 22 corresponds to a specific example of the "second power supply line" in the present disclosure.

The induction element 21 is inserted between the pattern wiring PLA 21 and the pattern wiring PLA 22 at a position where the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12 face each other (the position of the gap G). As a result, the pattern wiring PLA 21, the induction element 21, and the pattern wiring PLA 22 are connected in series in this order. As a result, the power supply terminal 17A of the RF circuit 17 and the battery socket BS are connected via the induction element 21.

13A to 13D show specific examples of the arrangement of the induction element 21, the pattern wiring PLA21, and the PLA22. 13A to 13D are views seen from the Z direction in FIG. 10, and depict the induction element 21 and its surroundings. In FIGS. 13A to 13D, the capacitive elements 22 and 23 are not shown. An example in which the induction element 21 is inserted between the pattern wiring PLA 21 and the pattern wiring PLA 22 at a position where the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12 face each other is, for example, such a diagram. The examples shown in 13A to 13D are included. In the example shown in FIG. 13A, the inductive element 21 does not straddle both the end 11C of the conductor 11 and the end 12C of the conductor 12. In this example, the pattern wiring PLA 21 straddles the end 11C of the conductor 11, and the pattern wiring PLA 22 straddles the end 12C of the conductor 12. In the example shown in FIG. 13B, the inductive element 21 straddles both the end 11C of the conductor 11 and the end 12C of the conductor 12. In this example, the pattern wiring PLA 21 does not straddle the end 11C of the conductor 11, and the pattern wiring PLA 22 does not straddle the end 12C of the conductor 12. In the example shown in FIG. 13C, the induction element 21 straddles the end 11C of the conductor 11, but does not straddle the end 12C of the conductor 12. In this example, the pattern wiring PLA 21 does not straddle the end 11C of the conductor 11, and the pattern wiring PLA 22 straddles the end 12C of the conductor 12. In the example shown in FIG. 13D, the induction element 21 does not straddle the end 11C of the conductor 11, but straddles the end 12C of the conductor 12. In this example, the pattern wiring PLA 21 straddles the end 11C of the conductor 11, and the pattern wiring PLA 22 does not straddle the end 12C of the conductor 12.

The capacitance element 22 is inserted between the pattern wiring PLA 21 and the conductor 112. Similarly, the capacitive element 23 is inserted between the pattern wiring PLA 22 and the conductor 122. In this example, the two capacitive elements 22 and 23 are provided, but the present invention is not limited to this, and for example, either one may be provided.

As described above, in the communication device 2, since the induction element 21 is provided on the power supply line PL2, the band characteristic of the antenna 10 can be improved. That is, for example, in the communication device 1A (FIG. 4) according to the first embodiment, the conductor 11 and the conductor 12 may be coupled to each other via the power supply line PL. Specifically, the power supply line PL and the conductor 11 are coupled by the parasitic capacitance between the power supply line PL and the conductor 112, and the power supply line PL is coupled by the parasitic capacitance between the power supply line PL and the conductor 122. When the conductor 12 and the conductor 12 are coupled to each other, the conductor 11 and the conductor 12 may be coupled to each other via the power supply line PL. When this coupling is strong, the RF current that should originally flow through the antenna 10 flows through the power supply line PL, so that the band of the antenna 10 may decrease, for example.

On the other hand, in the communication device 2 according to the present embodiment, the induction element 21 is provided at the position of the gap G in the power supply line PL2. As a result, the impedance at the frequency of the RF signal between the pattern wiring PLA 21 and the pattern wiring PLA 22 can be increased, so that the possibility that the conductor 11 and the conductor 12 are coupled to each other via the power supply line PL can be reduced. Can be done. As a result, in the communication device 2, the band characteristics of the antenna 10 can be improved.

Further, by appropriately setting the element value (inductance value) of the guiding element 21, the coupling between the pattern wiring PLA 21 and the conductor 112, the coupling between the pattern wiring PLA 22 and the conductor 122, and the guiding element 21 May function as a matching circuit. In this way, the antenna characteristics of the communication device 2 can be improved by positively using these coupling and induction elements 21 as a matching circuit.

Further, in the communication device 2, the capacitance element 22 is inserted between the pattern wiring PLA 21 and the conductor 112, and the capacitance element 23 is inserted between the pattern wiring PLA 22 and the conductor 122. Radiation efficiency can be increased. Specifically, for example, the capacitive element 22 connects the pattern wiring PLA 21 and the conductor 112 to each other, and the capacitive element 23 connects the pattern wiring PLA 22 and the conductor 122 to each other. This makes it less susceptible to loss due to the parasitic capacitance between the pattern wiring PLA 21 and the conductor 112, the parasitic capacitance between the pattern wiring PLA 22 and the conductor 122, and the load of the RF circuit 17 and the battery 18. , The radiation efficiency of radio waves is improved. Further, by connecting the pattern wiring PLA 21 and the conductor 112 and the pattern wiring PLA 22 and the conductor 122 in this way, it is possible to reduce the possibility of unintended resonance occurring in the pattern wiring PLA 21 and PLA 22.

It is desirable that the capacitance element 22 is provided at a position close to the induction element 21 in the pattern wiring PLA 21. Similarly, it is desirable that the capacitance element 23 is provided at a position close to the induction element 21 in the pattern wiring PLA 22. As a result, the path from the conductor 11 to the capacitance element 22, the induction element 21, the capacitance element 23, and the conductor 12 can be shortened, so that the influence of the parasitic capacitance between the pattern wiring PLA 21 and the conductor 112 and the pattern wiring can be shortened. Since it is possible to reduce the influence of the parasitic capacitance between the PLA 22 and the conductor 122, the radiation efficiency of radio waves can be improved.

As described above, in the present embodiment, since the induction element is provided on the power supply line, the possibility that the conductor 11 and the conductor 12 are coupled via the power supply line can be reduced, so that the band of the antenna can be reduced. The characteristics can be improved.

In the present embodiment, the capacitance element is inserted between the pattern wiring PLA 21 and the conductor 112, and the capacitance element is inserted between the pattern wiring PLA 22 and the conductor 122, so that the radiation efficiency of radio waves is improved. Can be improved.

Other effects are the same as in the case of the first embodiment.

<3. Third Embodiment>
Next, the communication device 3 according to the third embodiment will be described. In the present embodiment, the place where the power supply line is formed is different from that of the first embodiment. The components substantially the same as the communication devices (particularly communication devices 1, 1A) according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 14 shows a configuration example of the communication device 3. FIG. 15 shows an example of a front view of the communication device 3 seen from the Y direction in FIG. The communication device 3 has an RF circuit 17 and a battery 18. The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL3. In this example, the power supply line PL3 is arranged on the outside of the antenna 10 along the connecting conductor 14, the conductor 13, and the connecting conductor 15. That is, in the communication devices 1, 1A (FIGS. 2 and 4) according to the first embodiment, the power supply terminal 17A of the RF circuit 17 and the battery 18 are connected to the end portion 11C of the conductor 11 and the end portion 12C of the conductor 12. Although the connection is made via the power supply line PL arranged so as to straddle the antenna 10, the communication device 3 according to the present embodiment is connected via the power supply line PL3 arranged along the antenna 10.

16 and 17 show a configuration example of the communication device 3A according to a specific example of the communication device 3, FIG. 16 shows a front view of the communication device 3A as seen from the Y direction, and FIG. The plan view of the communication device 3A seen from the Z direction is shown.

The conductor 11 includes conductors 111 and 113. As shown in FIG. 16, the main surface 11A of the conductor 11 is the main surface of the conductor 111, and the end portion 11C of the conductor 11 is the end portion of the conductors 111 and 113. The conductor 113 is an RF circuit 17, an RF signal transmission line RFL, and a power supply line in a region of the substrate surface 16B of the substrate 16 on the side where the conductor 11 is provided when viewed from the end portion 11C of the conductor 11 in the X direction. It is mainly formed in a region other than the region where a part of the pattern wiring PLA31 (described later) of the PL is provided. The conductor 111 and the conductor 113 are connected to each other via a via V provided on the substrate 16.

The conductor 12 includes conductors 121 and 123. As shown in FIG. 16, the main surface 12A of the conductor 12 is the main surface of the conductor 121, and the end portion 12C of the conductor 12 is the end portion of the conductors 121 and 123. The conductor 123 is a pattern wiring PLA32 (described later) of a part of the power supply line PL in the region of the substrate surface 16B of the substrate 16 on the side where the conductor 12 is provided when viewed from the end portion 12C of the conductor 12 in the X direction. ) Is mainly formed in the area other than the area provided. The conductor 121 and the conductor 123 are connected to each other via a via V provided on the substrate 16.

The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL3 and the battery socket BS. In this example, the battery socket BS is arranged in the X direction on the side opposite to the side where the end portion 12C is provided when viewed from the battery 18. The power supply line PL3 includes a pattern wiring PLA31, a wiring PLB3, and a pattern wiring PLA32. The pattern wiring PLA31 is formed in a region corresponding to the conductor 11 on the substrate surface 16B of the substrate 16, one end is connected to the power supply terminal 17A of the RF circuit 17, and the other end is connected to one end of the wiring PLB3. ing. The pattern wiring PLA 32 is formed in a region of the substrate surface 16B of the substrate 16 corresponding to the conductor 12, one end of which is connected to the battery socket BS and the other end of which is connected to the other end of the wiring PLB3. In this example, the wiring PLB3 is arranged along the connecting conductor 14, the conductor 13, and the connecting conductor 15. One end of the wiring PLB3 is connected to the other end of the pattern wiring PLA31, and the other end is connected to the other end of the pattern wiring PLA32. That is, the pattern wiring PLA31, the wiring PLB3, and the pattern wiring PLA32 are connected in series in this order.

As described above, in the communication device 3, the power supply line PL3 is arranged along the connecting conductor 14, the conductor 13, and the connecting conductor 15. As a result, the radiation efficiency of radio waves can be increased. That is, for example, in the communication device 1A (FIG. 4) according to the first embodiment, as described above, the conductor 11 and the conductor 12 may be coupled via the power supply line PL. If this coupling is strong, the RF current that should originally flow through the antenna 10 may flow through the power supply line PL. On the other hand, in the communication device 3 according to the present embodiment, since the power supply line PL3 is formed along the antenna 10, the RF current that should flow through the antenna 10 flows through the power supply line PL. The risk can be reduced. As a result, the communication device 3 can improve the radiation efficiency of radio waves.

As described above, in the present embodiment, since the power supply line is arranged along the connecting conductor 14, the conductor 13, and the connecting conductor 15, the RF current that should flow through the antenna passes through the power supply line. Since the risk of flowing can be reduced, the radiation efficiency of radio waves can be improved. Other effects are the same as in the case of the first embodiment.

<4. Fourth Embodiment>
Next, the communication device 4 according to the fourth embodiment will be described. In the present embodiment, the place where the RF circuit 17 and the battery 18 are mounted is different from that of the first embodiment. The components substantially the same as the communication devices (particularly communication devices 1, 1A) according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 18 shows a configuration example of the communication device 4. FIG. 19 shows an example of a front view of the communication device 4 as viewed from the Y direction in FIG. FIG. 20 shows an example of a plan view of the communication device 4 as viewed from the Z direction. The communication device 4 has a conductor 43 and a substrate 46. The conductors 11, 12, 43 and the connecting conductors 14, 15 constitute the antenna 40.

The conductor 43 is a plate-shaped conductor that extends in the XY plane. The conductor 43 has a main surface 43A. The main surface 43A of the conductor 43 faces the main surface 11A of the conductor 11 and faces the main surface 12A of the conductor 12. In this example, the outer shape of the conductor 43 on the XY plane is made larger than the outer shape of the total region of the conductors 11 and 12 in the XY plane. Specifically, in this example, as shown in FIG. 20, the outer shape of the conductor 43 is larger than the outer shape of the total region of the conductors 11 and 12 at both ends in the X direction by a distance d, respectively, in the Y direction. At both ends, the distance d is larger than the outer shape of the total area of the conductors 11 and 12. Note that some or all of these four distances d may be different. Even in this case, the total length (antenna length) of the antenna 40 from the end portion 11C of the conductor 11 to the end portion 12C of the conductor 12 via the connecting conductor 14, the conductor 43, and the connecting conductor 15 is the electrical length of the antenna 40. Is designed to be equal to half the wavelength λ (λ / 2) of this RF signal. Here, the conductor 43 corresponds to a specific example of the "third conductor" in the present disclosure.

The substrate 46 is an insulating substrate on which the RF circuit 17 and the battery 18 are mounted. On the substrate surface 46A of the substrate 46, the RF circuit 17 is mounted in the region corresponding to the conductor 11, and the battery 18 is mounted in the region corresponding to the conductor 12. The substrate surface 46B of the substrate 46 is in contact with the conductor 11 and the conductor 12.

The RF circuit 17 is mounted on the substrate surface 46A of the substrate 46 in a region corresponding to the conductor 11. That is, in the communication devices 1, 1A (FIGS. 2 and 4) according to the first embodiment, the RF circuit 17 is viewed from the conductor 11 in the Z direction on the side opposite to the side on which the conductor 13 is provided. However, in the communication device 4 according to the present embodiment, the RF circuit 17 is arranged in the Z direction on the side where the conductor 43 is provided when viewed from the conductor 11. In other words, in the communication device 4, the RF circuit 17 is arranged in the space surrounded by the antenna 40. The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL, the reference potential terminal 17B is connected to the conductor 11 via a via provided on the substrate 46, and the RF signal terminal 17C Is connected to the conductor 12 via an RF signal transmission line RFL that includes a transmission line and another via provided on the substrate 46.

The battery 18 is mounted in a region corresponding to the conductor 12 on the substrate surface 46A of the substrate 46. That is, in the communication device 4, the battery 18 is arranged in the Z direction on the side where the conductor 43 is provided when viewed from the conductor 12. In other words, in the communication device 4, the battery 18 is arranged in the space surrounded by the antenna 40. The anode terminal 18A of the battery 18 is connected to the power supply terminal 17A of the RF circuit 17 via the power supply line PL, and the cathode terminal 18B is connected to the conductor 12 via a via provided on the substrate 46.

FIG. 21 shows a configuration example of the communication device 4A according to a specific example of the communication device 4, and is an example of a front view of the communication device 4A seen from the Y direction. The conductor 11 includes conductors 111 and 112. As shown in FIG. 21, the main surface 11A of the conductor 11 is the main surface of the conductor 112. The conductor 12 includes conductors 121 and 123. As shown in FIG. 21, the main surface 12A of the conductor 12 is the main surface of the conductor 122. That is, in the communication device 4A, the substrate 16 on which the RF circuit 17, the battery 18, and the battery socket BS in the communication device 1A (FIG. 5) according to the first embodiment is mounted is inverted in the Z direction. There is. The pattern formed on the substrate surface 16B is the same as the pattern in the communication device 1A (FIG. 6A). The conductor 14A of the connecting conductor 14 is connected to the conductor 43, and the conductor 14B is connected to the conductor 112 of the conductor 11. Similarly, the conductor 15A of the connecting conductor 15 is connected to the conductor 43, and the conductor 15B is connected to the conductor 122 of the conductor 12. Also in this example, the outer shape of the conductor 43 on the XY plane is made larger than the outer shape of the total region of the conductors 11 and 12 in the XY plane.

As described above, in the communication device 4, the RF circuit 17 is arranged in the Z direction (direction perpendicular to the main surface 11A of the conductor 11) on the side where the conductor 43 is provided as viewed from the conductor 11, and the battery 18 is provided. Was arranged in the Z direction (direction perpendicular to the main surface 12A of the conductor 12) on the side where the conductor 43 was provided when viewed from the conductor 12. In other words, the RF circuit 17 and the battery 18 are arranged in the space surrounded by the antenna 40. In particular, the RF circuit 17 and the battery 18 are components having a large volume among the components mounted on the communication device 4. In the communication device 4, since the RF circuit 17 and the battery 18 are arranged in the space surrounded by the antenna 40 in this way, the height of the communication device 4 in the Z direction can be lowered, and the communication device 4 is made thinner. be able to.

Further, in the communication device 4, the outer shape of the conductor 43 on the XY plane when viewed from the Z direction (the direction perpendicular to the main surface 43A of the conductor 43) is obtained from the outer shape of the total region of the conductors 11 and 12 in the XY plane. Also made larger. As a result, since the conductor 43 functions as a shield conductor, it is possible to make it difficult for radio waves to radiate into the space on the side of the conductor 43. Therefore, when the communication device 4 is attached to the surface of the human body or the surface of the container containing the liquid, the conductor 43 is attached so as to be located near the human body or the container, and the conductors 11 and 12 are attached so as to be located far from the human body or the container. When attached, the loss due to the radio wave being absorbed by the human body or the liquid is suppressed, so that the possibility that the radiation efficiency of the antenna 40 is lowered can be reduced. It is desirable that the distance d shown in FIG. 20 is, for example, equal to or greater than the height of the communication device 4 in the Z direction.

As described above, in the present embodiment, the RF circuit is arranged in the Z direction (the direction perpendicular to the main surface 11A of the conductor 11) on the side where the conductor 43 is provided as viewed from the conductor 11, and the battery is installed. , In the Z direction (direction perpendicular to the main surface 12A of the conductor 12), since the conductor 43 is arranged on the side provided with the conductor 43 when viewed from the conductor 12, the communication device can be made thinner.

In the present embodiment, the outer shape of the conductor 43 when viewed from the Z direction (direction perpendicular to the main surface 43A of the conductor 43) is made larger than the outer shape of the total region of the conductors 11 and 12, so that the radio wave is transmitted to the conductor 43. Since it is possible to make it difficult to radiate into the space on the side of the radio wave, it is possible to reduce the possibility that the radiation efficiency of radio waves is lowered.

Other effects are the same as in the case of the first embodiment.

[Modification 4-1]
In the above embodiment, the RF circuit 17 and the battery 18 are arranged in the space surrounded by the antenna 40, and the outer shape of the conductor 43 on the XY plane is larger than the outer shape of the total region of the conductors 11 and 12 in the XY plane. I made it bigger, but it is not limited to this. Instead of this, for example, as in the communication device 1 (FIG. 2) according to the first embodiment, the outer shape of the conductor 43 on the XY plane is substantially the same as the outer shape of the total region of the conductors 11 and 12 in the XY plane. It may be the same.

<5. Fifth Embodiment>
Next, the communication device 5 according to the fifth embodiment will be described. In this embodiment, the place where one of the RF circuit 17 and the battery 18 (battery socket BS) is mounted is different from that of the first embodiment. The components substantially the same as the communication device (particularly the communication device 1B) according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 22 shows a configuration example of the communication device 5. FIG. 23 shows an example of a front view of the communication device 5 as viewed from the Y direction in FIG. 22. FIG. 24A shows an example of a pattern formed on the substrate surface 16B. FIG. 24B shows a cross-sectional view taken along the line III-III in FIG. 24A. The communication device 5 includes conductors 51 and 52, an RF circuit 17, and a battery 18. The conductors 51, 52, 13 and the connecting conductors 14, 15 constitute the antenna 50.

The conductor 51 corresponds to the conductor 11 of the first embodiment. The conductor 51 includes conductors 511 and 512. As shown in FIG. 23, the main surface 51A of the conductor 51 is the main surface of the conductor 511, and the end portion 51C of the conductor 51 is the end portion of the conductors 511 and 512. The conductor 511 forms a power supply via PLV (described later) of the power supply line PL5 in the region of the substrate surface 16A of the substrate 16 on the side where the conductor 51 is provided when viewed from the end portion 51C of the conductor 51 in the X direction. It is mainly formed in a region other than the designated region. The conductor 512 is a transmission line RFLA of the RF circuit 17 and the RF signal transmission line RFL in the region of the substrate surface 16B of the substrate 16 on the side where the conductor 51 is provided when viewed from the end portion 51C of the conductor 51 in the X direction. , And the pattern wiring PLA5 (described later) of the power supply line PL5 is mainly formed in a region other than the region provided. The conductors 511 and 512 are connected to each other via vias V provided on the substrate 16.

The conductor 52 includes conductors 521 and 522. As shown in FIG. 23, the main surface 52A of the conductor 52 is the main surface of the conductor 521, and the end portion 52C of the conductor 52 is the end portion of the conductors 521 and 522. The conductor 521 is formed on the entire surface of the substrate surface 16A of the substrate 16 on the side where the conductor 52 is provided when viewed from the end portion 52C of the conductor 52 in the X direction. The conductor 522 is formed on the entire surface of the substrate surface 16B of the substrate 16 on the side where the conductor 52 is provided when viewed from the end portion 52C of the conductor 52 in the X direction. The conductor 521 and the conductor 522 are connected to each other via a via V provided on the substrate 16.

The RF circuit 17 is mounted on the substrate surface 16B of the substrate 16 in a region on the side where the conductor 51 is provided (hereinafter, also referred to as a region corresponding to the conductor 51) when viewed from the end portion 51C of the conductor 51 in the X direction. There is. In other words, the RF circuit 17 is arranged in the Z direction (direction perpendicular to the main surface 51A of the conductor 51) on the side opposite to the side on which the conductor 13 is provided when viewed from the conductor 51. The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL5 and the battery socket BS, the reference potential terminal 17B is connected to the conductor 512, and the RF signal terminal 17C is the RF signal transmission line RFL1. It is connected to the conductor 522 via. The battery 18 and the battery socket BS are mounted in a region corresponding to the conductor 51 on the substrate surface 16A of the substrate 16. In other words, the battery 18 and the battery socket BS are arranged in the Z direction (direction perpendicular to the main surface 51A of the conductor 51) on the side where the conductor 13 is provided when viewed from the conductor 51. That is, in this example, the battery 18 and the battery socket BS are arranged on the side opposite to the side where the RF circuit 17 is arranged when viewed from the conductor 51. The anode terminal 18A of the battery 18 is connected to the power supply terminal 17A of the RF circuit 17 via the battery socket BS and the power supply line PL5, and the cathode terminal 18B is connected to the conductor 511.

The power supply line PL5 includes a pattern wiring PLA5 and a power supply via PLV. The pattern wiring PLA5 connects the power supply terminal 17A of the RF circuit 17 and the power supply via PLV. The power supply via PLV is a via provided on the substrate 16 and connects the pattern wiring PLA5 and the battery socket BS.

Here, the conductor 51 corresponds to a specific example of the "first conductor" in the present disclosure. The conductor 52 corresponds to a specific example of the "second conductor" in the present disclosure.

Even with the above configuration, the same effect as in the case of the first embodiment can be obtained.

[Modification 5-1]
In the above embodiment, as shown in FIG. 23, the RF circuit 17 is mounted on the board surface 16B, and the battery 18 and the battery socket BS are mounted on the board surface 16A, but the present invention is not limited to this. Instead, for example, the RF circuit 17 may be mounted on the board surface 16A, and the battery 18 and the battery socket BS may be mounted on the board surface 16B.

[Modification Example 5-2]
In the above embodiment, as shown in FIGS. 22 and 23, the conductors 51 and 52, the power supply line PL5, and the RF signal transmission line RFL are configured by using a printed circuit board capable of forming a pattern on both sides. It is not limited to this. Alternatively, a multi-layer board having three or more layers may be used to form a transmission line RFLA for a conductor, a power supply line, and an RF signal transmission line RFL. The communication device 6 according to this modification will be described in detail below.

FIG. 25 shows a configuration example of the communication device 6. FIG. 26 shows an example of a front view of the communication device 6 as viewed from the Y direction in FIG. 25. FIG. 27A shows an example of a pattern formed on the substrate surface. FIG. 27B shows a cross-sectional view taken along the line IV-IV in FIG. 27A. The communication device 6 includes a substrate 66, conductors 61 and 62, an RF circuit 17, and a battery 18. The conductors 61, 62, 13 and the connecting conductors 14, 15 constitute the antenna 60.

The substrate 66 is a printed circuit board capable of forming a three-layer pattern on both sides and inside.

The conductor 61 corresponds to the conductor 11 of the first embodiment. The conductor 61 includes conductors 611 to 613. As shown in FIG. 26, the main surface 61A of the conductor 61 is the main surface of the conductor 611, and the end 61C of the conductor 61 is the end of the conductors 611 and 612. The conductor 611 forms a power supply via PLV (described later) of the power supply line PL6 in the region of the substrate surface 66A of the substrate 66 on the side where the conductor 61 is provided when viewed from the end 61C of the conductor 61 in the X direction. It is mainly formed in a region other than the designated region. The conductor 612 is a transmission line RFLA of the RF circuit 17 and the RF signal transmission line RFL1 in the region of the substrate surface 66B of the substrate 66 on the side where the conductor 61 is provided when viewed from the end 61C of the conductor 61 in the X direction. , And the pattern wiring PLA6 (described later) of the power supply line PL6 is mainly formed in a region other than the region provided. The conductor 613 forms a power supply via PLV (described later) of the power supply line PL6 in the region of the inner layer of the substrate 66 on the side where the conductor 61 is provided when viewed from the end portion 61C of the conductor 61 in the X direction. It is mainly formed in a region other than the designated region. The conductor 611 and the conductor 613 are connected to each other via the via V1, and the conductor 612 and the conductor 613 are connected to each other via the via V2.

The conductor 62 includes conductors 621 and 622. As shown in FIG. 26, the main surface 62A of the conductor 62 is the main surface of the conductor 621, and the end portion 62C of the conductor 62 is the end portion of the conductors 621 and 622. The conductor 621 is formed on the entire surface of the substrate surface 66A of the substrate 66 on the side where the conductor 62 is provided when viewed from the end portion 62C of the conductor 62 in the X direction. The conductor 622 is formed on the entire surface of the substrate surface 66B of the substrate 66 on the side where the conductor 62 is provided when viewed from the end portion 62C of the conductor 62 in the X direction. The conductor 621 and the conductor 622 are connected to each other via a via V provided on the substrate 66.

The RF circuit 17 is mounted on the substrate surface 66B of the substrate 66 in a region on the side where the conductor 61 is provided (hereinafter, also referred to as a region corresponding to the conductor 61) when viewed from the end 61C of the conductor 61 in the X direction. There is. Specifically, a pattern corresponding to the power supply terminal 17A, the reference potential terminal 17B, and the RF signal terminal 17C of the RF circuit 17 is formed on the substrate surface 66B, and the RF circuit 17 has the power supply terminal 17A and the reference potential. Terminals 17B and RF signal terminals 17C are mounted so as to be connected to these patterns, respectively. The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL6 and the battery socket BS, the reference potential terminal 17B is connected to the conductor 612, and the RF signal terminal 17C is the RF signal transmission line RFL1. It is connected to the conductor 622 via. The battery 18 and the battery socket BS are arranged in a region corresponding to the conductor 61 on the substrate surface 66A of the substrate 66. The anode terminal 18A of the battery 18 is connected to the power supply terminal 17A of the RF circuit 17 via the battery socket BS and the power supply line PL6, and the cathode terminal 18B is connected to the conductor 611.

The power supply line PL6 includes a pattern wiring PLA6 and a power supply via PLV. The pattern wiring PLA6 connects the power supply terminal 17A of the RF circuit 17 and the power supply via PLV. The power supply via PLV is a via that penetrates between the substrate surface 66A and the substrate surface 66B of the substrate 66, and connects the pattern wiring PLA6 and the battery socket BS.

Here, the conductor 61 corresponds to a specific example of the "first conductor" in the present disclosure. The conductor 62 corresponds to a specific example of the "second conductor" in the present disclosure.

As described above, in the communication device 6, since the substrate 66 is configured by using the three-layer multilayer substrate and the conductor 613 is provided in the substrate 66, the configuration of the antenna 60 can be made substantially symmetrical. That is, for example, in the communication device 5 (FIGS. 22 and 23) according to the above embodiment, one of the two conductors 51 and 512 of the conductor 51, the conductor 511, is viewed from the end portion 51C of the conductor 51 in the X direction. The two conductors 521 and 522 of the conductor 52 are formed on the entire surface of the region on the side where the conductor 51 is provided, and the two conductors 521 and 522 of the conductor 52 are the entire surface of the region on the side where the conductor 52 is provided when viewed from the end portion 52C of the conductor 52 in the X direction. Is formed in. Therefore, the symmetry of the antenna 50 of the communication device 5 is lowered. On the other hand, in the communication device 6 (FIGS. 25 and 26) according to the present embodiment, two conductors 611 and 613 out of the three conductors 611 to 613 of the conductor 61 are viewed from the end portion 61C of the conductor 61 in the X direction. The two conductors 621 and 622 of the conductor 62 are formed on almost the entire surface of the region on the side where the conductor 61 is provided, and the two conductors 621 and 622 of the conductor 62 are the regions on the side where the conductor 62 is provided when viewed from the end portion 62C of the conductor 62 in the X direction. It is formed on the entire surface. Therefore, the antenna 60 of the communication device 6 can improve the symmetry. As a result, the communication device 6 can radiate radio waves with good symmetry.

Although the present invention has been described above with reference to some embodiments and modifications, the present invention is not limited to these embodiments and the like, and various modifications are possible.

For example, the techniques according to each of the above embodiments may be combined. Specifically, for example, the outer shape of the conductor 13 on the XY plane in the communication device according to the first embodiment, the second embodiment, and the third embodiment is related to the fourth embodiment. As shown in the conductor 43 (for example, FIG. 18), it may be larger than the outer shape of the total region of the conductors 11 and 12 in the XY plane. Similarly, the outer shape of the conductor 13 on the XY plane in the communication device according to the fifth embodiment may be larger than the outer shape of the total region of the conductors 51 and 52 in the XY plane.

Further, for example, as in the communication device 7 shown in FIGS. 28 and 29, the technology according to the third embodiment and the technology according to the fourth embodiment may be combined. FIG. 28 shows a front view of the communication device 7 as viewed from the Y direction, and FIG. 29 shows an example of a pattern formed on the substrate surface 16B. In this communication device 7, the RF circuit 17, the battery 18, and the battery socket BS are arranged in the space surrounded by the antenna, and the power supply line PL7 is aligned with the connecting conductor 14, the conductor 13, and the connecting conductor 15. It is placed in.

The conductor 11 includes conductors 111 and 114. As shown in FIG. 28, the main surface 11A of the conductor 11 is the main surface of the conductor 114, and the end portion 11C of the conductor 11 is the end portion of the conductors 111 and 114. The conductor 114 is an RF circuit 17, an RF signal transmission line RFL, and a power supply line in the region of the substrate surface 16B of the substrate 16 on the side where the conductor 11 is provided when viewed from the end portion 11C of the conductor 11 in the X direction. It is mainly formed in a region other than the region where a part of the pattern wiring PLA71 (described later) of PL7 is provided. The conductor 111 and the conductor 114 are connected to each other via a via V provided on the substrate 16.

The conductor 12 includes conductors 121 and 124. As shown in FIG. 28, the main surface 12A of the conductor 12 is the main surface of the conductor 124, and the end portion 12C of the conductor 12 is the end portion of the conductors 121 and 124. The conductor 124 is a pattern wiring PLA72 (described later) of a part of the power supply line PL7 in the region of the substrate surface 16B of the substrate 16 on the side where the conductor 12 is provided when viewed from the end portion 12C of the conductor 12 in the X direction. ) Is mainly formed in the area other than the area provided. The conductor 121 and the conductor 124 are connected to each other via a via V provided on the substrate 16.

The power supply terminal 17A of the RF circuit 17 is connected to the anode terminal 18A of the battery 18 via the power supply line PL7 and the battery socket BS. The power supply line PL7 includes a pattern wiring PLA71, a wiring PLB7, and a pattern wiring PLA72. The pattern wiring PLA71 is formed in a region corresponding to the conductor 11 on the substrate surface 16B of the substrate 16, one end is connected to the power supply terminal 17A of the RF circuit 17, and the other end is connected to one end of the wiring PLB7. ing. The pattern wiring PLA72 is formed in a region of the substrate surface 16B of the substrate 16 corresponding to the conductor 12, one end of which is connected to the battery socket BS and the other end of which is connected to the other end of the wiring PLB7. In this example, the wiring PLB 7 is arranged inside the antenna along the connecting conductor 14, the conductor 13, and the connecting conductor 15.

Further, for example, the communication device according to each of the above embodiments may be covered with a resin. FIG. 30 shows a configuration example of the communication device 8 according to this modification. The communication device 8 is the same as the communication device 4 (for example, FIGS. 18 and 19) according to the fourth embodiment, in which the RF circuit 17 and the battery 18 are arranged in the space surrounded by the antenna. In the communication device 8, the periphery is covered with resin, and the space surrounded by the antenna is also filled with resin.

Further, for example, the communication device according to each of the above embodiments may be configured so that the battery 18 is permanently fixed, or the battery 18 may be configured to be detachable.

Further, in each of the above-described embodiments, each communication device is applied to the communication device 101 that transmits a beacon signal, but the present invention is not limited to this. Alternatively, for example, each communication device may be applied to a communication device that receives a signal. In this case, as the RF circuit 17, for example, one having a function of performing demodulation processing based on the RF signal supplied from the antenna via the RF signal transmission line can be used. Further, the RF circuit 17 may have both a function of transmitting a signal and a function of receiving a signal.

1-8, 1A, 1B, 3A, 4A ... Communication device 10, 40, 50, 60 ... Antenna 11-13, 43, 51, 52, 61, 62, 111-114, 121, 122, 511, 512 , 521,522,611-613,621,622 ... Conductor, 11A, 12A, 13A ... Main surface, 11C, 12C, 51C, 52C, 61C, 62C ... End, 14,15 ... Connecting conductor, 14A, 14B, 15A, 15B ... Conductor, 16,46 ... Board, 16A, 16B, 46A, 46B ... Board surface, 17 ... RF circuit, 17A ... Power supply terminal, 17B ... Reference potential terminal, 17C ... RF signal terminal, 18 ... Battery, 18A ... Antenna terminal, 18B ... Cathode terminal, 19 ... Matching circuit, 21 ... Inductive element, 22, 23 ... Capacitive element, 100 ... Communication system, 101, 101A, 101B ... Communication device, 102, 102A, 102B ... Hub device, 103 ... Server device, BS ... Battery socket, d ... Distance, G ... Gap, PL, PL2, PL3, PL5, PL6, PL7 ... Power supply line, PLA, PLA2, PLA21, PLA22, PLA31, PLA32, PLA5, PLA6, PLA71 , PLA72 ... Pattern wiring, PLB3, PLB7 ... Wiring, PLV ... Power supply via, RFL, RFL1 ... RF signal transmission line, RFLA ... Transmission line, V, V1, V2 ... Via.

Claims (16)

A first conductor and a second conductor, each of which has a main surface and an end and are arranged side by side so that the ends face each other in the first direction.
A third conductor having a main surface of the first conductor and a main surface of the second conductor facing the main surface,
A first connecting conductor connected at a position separated from the end portion of the first conductor by a predetermined distance in the first direction and connecting the first conductor and the third conductor.
A second connecting conductor connected to the second conductor at a position separated from the end portion of the second conductor by a predetermined distance in the first direction and connecting the second conductor and the third conductor.
In the first direction, the first conductor is arranged on the side where the first conductor is provided when viewed from the end of the first conductor, and the power supply terminal, the reference potential terminal, and the end of the first conductor are provided. And an RF circuit having an RF signal terminal connected to the second conductor via an RF signal transmission line arranged so as to straddle the end of the second conductor.
The first terminal having an anode terminal and a cathode terminal, which is one of the anode terminal and the cathode terminal, is the first conductor, the second conductor, the third conductor, and the first conductor. The second terminal, which is connected to the reference potential terminal via the connecting conductor and one or more of the second connecting conductors, and is the other of the anode terminal and the cathode terminal, is a power supply line. A communication device with a battery connected to the power supply terminal via. A first conductor and a second conductor, each of which has a main surface and an end and are arranged side by side so that the ends face each other in the first direction.
A third conductor having a main surface of the first conductor and a main surface of the second conductor facing the main surface,
A first connecting conductor connected at a position separated from the end portion of the first conductor by a predetermined distance in the first direction and connecting the first conductor and the third conductor.
A second connecting conductor connected to the second conductor at a position separated from the end portion of the second conductor by a predetermined distance in the first direction and connecting the second conductor and the third conductor.
A power supply terminal arranged on the side where the first conductor is provided and connected to a power supply line in the first direction when viewed from the end of the first conductor, and the first conductor, said. A first of the battery's anode and cathode terminals via one or more of the second conductor, the third conductor, the first connecting conductor, and the second connecting conductor. The second conductor via a reference potential terminal to be connected to the terminal and an RF signal transmission line arranged so as to straddle the end of the first conductor and the end of the second conductor. An RF circuit having an RF signal terminal connected to
A communication device including a battery socket to which the battery can be fixed and the second terminal, which is the other of the anode terminal and the cathode terminal, can be connected to the power supply line. The communication device according to claim 1, wherein the battery is arranged on the side where the second conductor is provided when viewed from the end of the second conductor in the first direction. The RF circuit is arranged in a direction perpendicular to the main surface of the first conductor on the side where the third conductor is provided as viewed from the first conductor.
The communication device according to claim 3, wherein the battery is arranged in a direction perpendicular to the main surface of the second conductor on the side where the third conductor is provided as viewed from the second conductor. The power supply line is any one of claims 1, 3, and 4, wherein the power supply line is arranged so as to straddle the end of the first conductor and the end of the second conductor. Described communication device. The power supply line
The first power line connected to the power terminal and
The second power line connected to the second terminal and
An induction element inserted between the first power supply line and the second power supply line at a position where the end portion of the first conductor and the end portion of the second conductor face each other. The communication device according to claim 5. The communication device according to claim 2, wherein the battery socket is arranged on the side where the second conductor is provided when viewed from the end of the second conductor in the first direction. The RF circuit is arranged in a direction perpendicular to the main surface of the first conductor on the side where the third conductor is provided as viewed from the first conductor.
The communication device according to claim 7, wherein the battery socket is arranged in a direction perpendicular to the main surface of the second conductor on the side where the third conductor is provided as viewed from the second conductor. .. The power supply line according to any one of claims 2, 7, and 8, wherein the power supply line is arranged so as to straddle the end of the first conductor and the end of the second conductor. Described communication device. The power supply line
The first power line connected to the power terminal and
A second power line connected to the battery socket,
An induction element inserted between the first power supply line and the second power supply line at a position where the end portion of the first conductor and the end portion of the second conductor face each other. The communication device according to claim 9. A first capacitive element inserted between the first power supply line and the first conductor, and a second capacitance element inserted between the second power supply line and the second conductor. The communication device according to claim 6 or 10, further comprising one or both of the capacitive elements. The first to fourth, seventh, and eighth aspects of the power supply line are arranged along the first connecting conductor, the third conductor, and the second connecting conductor. The communication device according to any one item. The battery is on the side where the first conductor is provided in the first direction as viewed from the end of the first conductor, and in a direction perpendicular to the main surface of the first conductor. The communication device according to claim 1, wherein the RF circuit is arranged on the side opposite to the side where the RF circuit is arranged when viewed from the first conductor. The battery socket is the side in which the first conductor is provided in the first direction when viewed from the end of the first conductor, and is in a direction perpendicular to the main surface of the first conductor. The communication device according to claim 2, wherein the RF circuit is arranged on the side opposite to the side where the RF circuit is arranged when viewed from the first conductor. The communication device according to claim 13 or 14, wherein the first conductor is formed by using a substrate having three or more conductor layers. Claim that the outer shape of the third conductor when viewed from the second direction perpendicular to the main surface of the third conductor is larger than the total outer shape of the first conductor and the second conductor. The communication device according to any one of claims 1 to 15.

Images