Antenna receiving device and electronic clock

Abstract

An antenna receiving device and an electronic watch are provided that can more appropriately determine the receiving sensitivity at the receiving frequency of the product. [Solution] The antenna receiving device includes an antenna for receiving radio waves, a substrate (21) having three or more connection pads (P1-P9), and connection portions connecting any two of the connection pads (P1-P9) to the antenna. The substrate (21) has at least two or more first electrodes connectable to a ground plane (G) and two or more second electrodes connectable to a feed point, and when the substrate (21) has two or more first electrodes, the first wiring distances from the first electrodes to the ground plane are different, and when the substrate (21) has two or more second electrodes, the second wiring distances of the signal lines extending from the second electrodes are different.

Description

[Technical field]

[0001] The present invention relates to an antenna receiving device and an electronic timepiece. [Background technology]

[0002] Some small portable terminal devices, such as electronic wristwatches, receive radio waves in the GHz band, such as those from positioning satellites. In such receivers, it is difficult to have an antenna protruding from the outside, so they are often positioned along the surface or periphery of the housing.

[0003] Such an antenna is fixed and is limited in size according to the size of the housing. In this case, a desired resonant frequency can be obtained by determining the power supply point and ground point on the antenna according to the frequency of the target signal to be received and connecting them by wiring. That is, when the internal configuration or external design of a product changes, it may be necessary to adjust and move the position of the wiring connection. In order to easily deal with such a situation, a technology has been disclosed in which multiple electrodes are prepared on a wiring board in advance and one of them can be selectively connected (Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-086312 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when impedance matching and the like are taken into consideration, there is a problem in that appropriate reception sensitivity at a desired frequency cannot be obtained by simply adjusting the connection position.

[0006] In order to achieve the above object, the present invention An antenna receiving device according to one aspect of the present invention teeth, An antenna for receiving radio waves; 4 a substrate having one or more electrodes; Of the electrodes Between the antenna and an electrode having a wiring for connecting to a ground plane, and between the antenna and an electrode having a wiring for connecting to an impedance matching circuit and / or a radio wave receiving circuit and a connection portion connecting the having The substrate is The impedance matching circuit and / or the radio wave receiving circuit does not have wiring to connect to The above a first electrode having a wiring for connection to a ground plane; No wiring is provided for connection to the ground plane, Impedance matching circuit and / or said radio wave receiving circuit A second electrode having wiring for connecting to the a wiring disposed between the first electrode and the second electrode and for connecting to the ground plane; Impedance matching circuit and / or said radio wave receiving circuit and a wiring for connecting to the third electrode. Equipped with the substrate has two or more of the third electrodes; At least one of a wiring for connecting to the ground plane and a wiring for connecting to the impedance matching circuit and / or the radio wave receiving circuit, which is provided in the third electrode, is an intermediate wiring connecting between the third electrodes, When the connection portion is connected to one of the third electrodes, a path to the ground plane or a path to the impedance matching circuit and / or the radio wave receiving circuit is set from the antenna via multiple third electrodes and the intermediate wiring. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention An antenna receiving device according to one aspect of the present invention teeth, An antenna for receiving radio waves; A substrate having three or more electrodes; Connection parts connecting any two of the electrodes to the antenna, respectively; having The substrate is The antenna has at least two first electrodes connectable to a ground plane and at least two second electrodes connectable to a power supply point; When the first electrode is provided in two or more At least one of the two or more first electrodes is connectable to both the ground plane and the power supply point; When there are two or more second electrodes At least one of the two or more second electrodes is connectable to both the ground plane and the feed point. Effect of the Invention

[0008] According to the present invention, it is possible to more appropriately determine the antenna receiving sensitivity of a product. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a plan view showing the external appearance of the electronic timepiece. [Diagram 2] FIG. 2 is a diagram illustrating the positional relationship between a housing and a board. [Diagram 3] FIG. 2 is a diagram showing a part of a cross section including one connection pin on the inside of a housing. [Figure 4] 1A and 1B are diagrams illustrating a connection portion with a connection pin on a substrate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the external appearance of the electronic timepiece 1. As shown in FIG.

[0011] The top surface of the electronic timepiece 1 has a display unit 11 in the center, surrounded by a bezel 13. The electronic timepiece 1 also has an exterior member 14 that covers part of the bezel 13, and a connection part 16 for connecting a belt to the main body. Push button switches B1 to B4 and a crown C1 are provided on the side of the electronic timepiece 1. The exterior member 14 is fixed to the housing 12 (see Figures 2 and 3) with screws 15. Accordingly, the bezel 13 is fixed between the exterior member 14 and the housing 12.

[0012] The exterior member 14 protects the main body of the electronic timepiece 1, including the push button switches B1 to B4 and the crown C1, with its unevenness, and also functions as a design decoration. The material of the exterior member 14 may be, for example, resin.

[0013] The bezel 13 is a conductive member (usually a metal member) with a ring-shaped structure. The bezel 13 operates as an antenna in the electronic timepiece 1. Here, the antenna receives right-handed circularly polarized waves from positioning satellites (mainly satellites related to the Global Positioning Satellite System (GPS)).

[0014] The push button switches B1 to B4 and the crown C1 penetrate the side surface of the case 12 and protrude outward, and are capable of accepting the pushing of the push button switches B1 to B4 and the pulling out and rotating of the crown C1.

[0015] The display unit 11 has a digital display and performs digital display.

[0016] 2 is a diagram for explaining the positional relationship between the housing 12 and the substrate 21. This diagram is also a plan view from above, similar to FIG. The housing 12 has a generally cylindrical structure that contains and protects the operating modules such as the board 21 and the battery 30 (see FIG. 3). The housing 12 has through holes in its side surface for the above-mentioned connection parts 16.

[0017] Nine through holes 121 are located near the inner edge of the housing 12. Connection pins 241, 242 (connection pin 24 for connection parts, either together or either one) are inserted into any two of these through holes 121. As described later, the connection pins 241, 242 electrically connect the bezel 13 as an antenna to any one of the connection pads P1 to P9 on the substrate 21. The connection pins 241, 242 do not need to be joined (fixed) to the housing 12 or other parts. As described later, one end of the connection pin 241 that contacts the bezel 13 serves as a power supply point, and the other end sends a reception signal to a receiving circuit connected via a signal line. The connection pin 242 is connected to a ground surface G (see FIG. 4) on the substrate 21.

[0018] The housing 12 has an insertion groove 122 for an O-ring on the outer edge side of the through hole 121, and with the O-ring inserted, is in contact with and fixed to the bezel 13 and the exterior member 14, thereby providing a waterproof structure.

[0019] FIG. 3 is a diagram showing a part of a cross section including any one of the connection pins 24 inside the housing 12. As shown in FIG. Above the substrate 21, there are a display screen 111 and a light-transmitting (usually transparent) protective layer 112 (contact glass) covering the display screen, with a metal frame 23 in between. Below the substrate 21, there is a battery 30, which is fixed and supported by the frame 22. The bottom surface is covered by a back cover 17.

[0020] Some of the circuits on board 21, such as a radio wave receiving circuit and a CPU that operates as a control unit and performs various control operations such as counting, displaying, and correcting the date and time, are covered by a shielding case 211. Shielding case 211 is for protecting the internal elements from electromagnetic waves and static electricity, and is, for example, a conductive box structure. Other components on board 21, such as an oscillator circuit, a clock unit that counts the current date and time (current time), and a non-volatile memory, may be located outside shielding case 211.

[0021] A part of the circuitry 212, here a transmission / reception circuit relating to Bluetooth (registered trademark), may be provided on the lower surface of the substrate 21.

[0022] Metal frame 23 has a conductive plate that protects the circuit on board 21 from static electricity. Metal frame 23 also contacts shielding case 211 by leg-like portions 231, and is connected to the ground surface on board 21 via shielding case 211. Metal frame 23 is located approximately inside the inner edge of bezel 13.

[0023] The display screen 111 is, for example, a liquid crystal display screen, but is not limited to this and any type of liquid crystal may be used. Various displays are made on the display screen 111 based on control signals from the control unit on the substrate 21.

[0024] The connection pin 24 inserted into the through hole 121 of the housing 12 may have a spring structure that is expandable and contractible in the direction of extension. When the electronic watch 1 is assembled and sealed, both ends of the connection pin 24 are in a contracted spring state and in contact with the substrate 21 and the bezel 13, respectively. This ensures that contact with both sides is maintained by the tension of the spring, even if the electronic watch 1 receives a slight shock. In addition, the through hole 121 has two width stages, and the connection pin 24 has a head shape that fits into these stages, preventing misalignment in the left-right direction.

[0025] The bezel 13 is located outside the housing 12 and functions as an antenna. The annular bezel 13 is connected to the circuit on the substrate 21 at two points by the connection pins 241 and 242 as described above. One of the points is connected to the ground plane, and the other is a power feed point. As a result, the bezel 13 pairs with the ground plane on the substrate 21 and operates like a patch-shaped microstrip antenna.

[0026] At least a portion of frame 22 is a conductive member, which fixes, holds, and protects battery 30 inside, while also contacting the ground surface of board 21 and back cover 17 to extend the range of the ground surface to back cover 17. As shown in Fig. 3, frame 22 does not need to cover the entire side surface of battery 30. Furthermore, frame 22 and back cover 17 may be connected electrically more stably and with low resistance (low impedance) via leaf spring 25 or the like made of a conductive member (metal or the like).

[0027] The battery 30 is connected to a power supply terminal of the board 21 and supplies power to each circuit of the board 21. The battery 30 may be removable and replaceable, or may be fixed to the frame 22. In the latter case, the battery 30 may be rechargeable according to power generated by a solar panel (not shown), or according to power supplied from the outside via connection to an external connection terminal.

[0028] FIG. 4 is a diagram for explaining the connection portion with the connection pin 24 on the substrate 21. As shown in FIG.

[0029] A plurality of (a predetermined number of three or more, nine in this example) connection pads P1 to P9 (electrodes) are positioned on the substrate 21 in accordance with the positions of the through holes 121. The connection pads P2 to P8 are connected by wirings L1 to L12 (intermediate wirings) via a predetermined lumped constant circuit D1 (disconnection section), respectively. The lumped constant circuit D1 is an RLC (resistor, inductor, capacitor) circuit, and can be selectively switched between an open state and a conductive state. This switching may be irreversible. The lumped constant circuit D1 is not on the straight line connecting the adjacent connection pads that are connected by wiring, but is located off the line. Accordingly, the wiring connecting the connection pads is bent. Since the distance between the connection pads is short from the viewpoint of saving space, by making it bent, the length of the wiring can be extended even if the straight line distance is short.

[0030] The wiring L21 connected to the connection pad P1 and the wiring L22 extending from between the connection pads P2 and P3 are included in the path of a signal line connected to the receiving circuit 214 (including a front end having an LNA (Low Noise Amplifier) ​​and a BPF (Band Pass Filter), and a radio wave reception control driver (such as a back-end baseband circuit)) via the impedance matching circuit 213 and the wiring L23. On the other hand, the wiring L31 extending from between the wirings L5 and L6, the wiring L32 extending from between the wirings L11 and L12, and the wiring L33 extending from the connection pad P9 are connected to the ground plane G via the connection parts S1 to S3, respectively.

[0031] That is, the connection pads P1 to P8 (at least two second electrodes) are all electrodes connectable to a power supply point, and the signal line is connected to the impedance matching circuit 213 through a part determined (settable) according to the connection pad selected from the wirings L21, L22, and L1 to L12. Furthermore, the signal line is connected to the receiving circuit 214 via the impedance matching circuit 213. Also, the connection pads P2 to P9 (at least two first electrodes) can all be connected to the ground plane G through a part determined according to the connection pad selected from the wirings L1 to L12, L31 to L33 and the connection parts S1 to S3. In a situation where the connection pin 241 is connected to any of the connection pads P1 to P8, there is always one or more connection pads connectable to the connection pin 242. Similarly, in a situation where the connection pin 242 is connected to any of the connection pads P2 to P9, there is always one or more connection pads connectable to the connection pin 241. Also, depending on the selected combination of connection pads and the selection of connection parts S1 to S3 to the ground plane G (i.e., the number of connection pads to be passed through), the length of the wiring along the path to reach the impedance matching circuit 213 (second wiring distance) and the length of the wiring along the path to reach the ground plane G (first wiring distance) may differ. For example, in the example shown in Fig. 3, the connection pin 241 is connected to the connection pad P1, and is connected to the impedance matching circuit 213 only via the wiring L21. Also, the connection pin 242 is connected to the connection pad P8, and is connected to the ground plane G via the wirings L12 and L32.

[0032] The connection pads P2 to P8 can be connected to both the ground plane G and the impedance matching circuit 213 (serving as both the first and second electrodes), so that electrical continuity may be cut off in unnecessary parts of the lumped constant circuit D1 and the connection parts S1 to S3 depending on the connection pads P2 to P8 that are actually selected.

[0033] Although the distances from the connection pads P4, P5, P7, and P8 to the ground surface G are all the same, selecting one of them can change the distance between the two connection pins 241 and 242 in the bezel 13 (the angle between the connection pads and the center). The resonant frequency can be adjusted according to this distance (angle).

[0034] As described above, by appropriately adjusting the positional relationship between the connection pins 241 and 242, the distance from the connection pin 241 to the impedance matching circuit 213, and the distance from the connection pin 242 to the ground surface G, it becomes possible to more appropriately adjust the resonance frequency and phase difference of the radio waves received by the bezel 13. These can also be changed depending on the lumped constant circuit D1, the connection pin 24, etc., so that minute deviations from the product design can be appropriately adjusted.

[0035] Of the above components, the bezel 13, the connection pins 24, and at least a part of the substrate 21 constitute the antenna receiver of this embodiment.

[0036] As described above, the electronic timepiece 1 including the antenna receiver of this embodiment has a bezel 13 that receives radio waves, a substrate 21 with three or more connection pads P1 to P9, and connection pins 24 that connect any two of the connection pads P1 to P9 to the bezel 13. The substrate 21 has at least two or more first electrodes connectable to a ground surface G and at least two second electrodes connectable to a power supply point, and when it has two or more first electrodes (here, connection pads P2 to P9), it has wiring with different first wiring distances from the first electrodes to the ground surface G, and when it has two or more second electrodes (here, connection pads P1 to P8), it has wiring with different second wiring distances of signal lines extending from the second electrodes. With this configuration, simply by adjusting and selecting the connection pads P1-P9 to be connected to the connection pins 24, the electronic watch 1 (antenna receiver) can easily and appropriately match the reception frequency and resonance frequency by the antenna and match the impedance, and can receive radio waves of the desired wavelength with better reception sensitivity. This makes it easy to maintain good radio wave reception conditions without changing the entire design, even if the board 21 or the housing 12 is replaced due to improvements or a model change. In addition, since minute errors from the design values ​​can be easily and appropriately adjusted, the electronic watch 1 can receive the desired radio waves with more stable and appropriate sensitivity.

[0037] In particular, the substrate 21 has two or more of either the first electrode or the second electrode, and has one or more other electrodes (e.g., first electrodes) to which the other one of the connection pins 24 (e.g., connection pin 242) can be connected when one of the one electrodes (e.g., second electrodes) is connected to one of the connection pins 24 (e.g., connection pin 241). Therefore, in the electronic timepiece 1, the reception frequency and the resonant frequency of the bezel 13 can be adjusted appropriately according to the selected first and second electrodes, and impedance matching can be easily performed.

[0038] In addition, the connection pads P1 to P9 are arranged in a positional relationship that allows the distance between the connection positions (one of which is the power supply point) with two connection pins 24 on the bezel 13 to be changed depending on the combination of a first electrode that connects the ground surface G and the bezel 13 via a connection pin 242 and a second electrode that connects the power supply side and the bezel 13 via a connection pin 241. That is, by making the distance between the connection pins 241, 242 on the bezel 13 (antenna) adjustable, the receiving frequency of the radio wave and the resonant frequency can be appropriately matched.

[0039] The wiring also includes wiring L1-L12 (intermediate wiring) connecting between the connection pads P2-P8, and a path to the ground plane G and a path of a signal line to the receiving circuit 214 can be set from the bezel 13 via the multiple connection pads P2-P8, with the first wiring distance and the second wiring distance changing according to the number of connection pads to be passed through. In other words, by sharing the long wiring on the board with other wiring, it is not necessary to form more wiring than necessary on the board, and it is possible to save time and space.

[0040] Furthermore, the intermediate wiring connects the connection pads P2 to P8 with bent or curved lines. Because it is difficult to space the connection pads P2 to P8 apart due to the size of the electronic timepiece 1, i.e., the size of the board 21, and the accuracy of adjustment, by not making the intermediate wiring straight, a wiring distance longer than the actual distance can be obtained. This makes it possible to adjust the distance to the ground surface G and the impedance matching circuit 213 over a wide range. Adjustment is particularly easy when it becomes difficult to obtain a length appropriate to the reception frequency from the outer periphery alone due to miniaturization, etc.

[0041] Furthermore, at least some of the connection pads P2 to P8 serve as both the first electrode and the second electrode. The wiring includes a lumped constant circuit D1, and the lumped constant circuit D1 can cut either the path from the connection pads P2 to P8 to the ground surface G or the path of the signal line to the receiving circuit 214. In this way, the lumped constant circuit D1 can appropriately match impedance while preventing current from flowing in unnecessary directions, so that the wiring to the ground surface G and the wiring to the power supply side can be formed to be shared to some extent, and can be made to conduct in the direction required. This allows the electronic watch 1 to further reduce the number of wirings, space, and formation effort.

[0042] In addition, the path of the signal line from the second electrode is connected to the radio wave reception control driver of the receiving circuit 214 via the impedance matching circuit 213. In other words, not only can the length be adjusted according to the resonant frequency, but the impedance and phase difference can also be appropriately matched to receive the signal, so that unnecessary loss can be prevented and the desired radio waves can be received with better sensitivity.

[0043] In addition, the bezel 13 is annular. In a portable terminal device, which often has a display unit 11 in the center of the front surface, providing an annular antenna makes it possible to receive radio waves efficiently using an antenna with a length according to the wavelength of the radio waves to be received without interfering with other components.

[0044] The electronic watch 1 of this embodiment is equipped with the above-mentioned antenna receiving device configuration, a timekeeping unit that counts the current time, and a control unit that corrects the current time counted by the timekeeping unit based on the radio waves received by the antenna receiving device. Therefore, the electronic watch 1 can receive radio waves more appropriately while suppressing increases in weight, size, and power consumption, thereby maintaining accurate counting of the current date and time, and executing various functions.

[0045] The present invention is not limited to the above-described embodiment, but may be modified in various ways. For example, in the above embodiment, the bezel 13 is described as being used as an antenna, but another annular member may be used instead, or a dedicated member for the antenna may be provided separately.

[0046] In the above embodiment, the distance from the connection pads connected to the connection pins 24 by the wiring connecting the connection pads P2 to P8 to the impedance matching circuit 213 or the ground surface G is variable, but the wiring pattern is not limited to this. For example, the connection pads P2 to P8 may be connected to only one of the impedance matching circuit 213 and the ground surface G, and the distance of only the one may be variable. Also, it is sufficient that the length of the wiring can be variable depending on the selected connection pad. For example, each of the connection pads P2 to P8 may be directly connected to the impedance matching circuit 213 or the ground surface G with different wiring distances, without passing through other connection pads. Also, the wiring has been described as being in the form of a bent line that is bent at the lumped constant circuit D1 between the connection pads P2 to P8, but it may be bent in a curved shape at other parts, or may be connected to the lumped constant circuit D1 by asymptotically approaching a predetermined straight line.

[0047] In the above embodiment, the connection pads P1 and P9 are described as being exclusively connected to the impedance matching circuit 213 and the ground surface G, respectively, but wiring may not be provided so that such exclusive portions are provided. Conversely, a connection pad connected only to the impedance matching circuit 213 and a connection pad connected only to the ground surface G may be provided separately, and at least one of them may be multiple. The number of connection pads may be changed arbitrarily depending on the required accuracy, adjustment width, and the width (angle range) in which the connection pads can be arranged. The connection pads P2 to P7 do not need to be arranged in a straight line, and may be arranged in an arc along the circumference, for example.

[0048] In addition, in the above embodiment, the connection pin 24 has been described as connecting between the bezel 13 and the connection pads P1 to P9 at the same positions when viewed in a plane, but as long as the positional relationship between the positions on the bezel 13 and the connection pads P1 to P9 can be properly maintained, it is not limited to connecting between the same positions when viewed in a plane.

[0049] In addition, in the above embodiment, the circular connection pads P1 to P9 and the linear wiring are described as being clearly different from each other. However, as long as the connection position with the connection pin 24 can be properly maintained and the lumped constant circuit D1 can be properly positioned, the connection pad portion and the wiring portion may be provided continuously.

[0050] In the above embodiment, the through holes 121 are provided in the housing 12, but they may be provided in a plate surface attached to the housing 12. Furthermore, as long as the connection positions of the connection pads P1 to P9 and the bezel 13 can be appropriately maintained without much effort, the configuration does not need to have the same number of through holes as the number of connection pads.

[0051] Furthermore, in the above embodiment, the case where the annular bezel 13 is used as an antenna has been described, but the above configuration can also be applied to a case where an antenna of a similar structure, for example a planar microstrip antenna, has a resonant frequency adjusted according to the ground point and the power supply point.

[0052] In the above embodiment, the electronic watch 1 is described as receiving radio waves from a positioning satellite, but this is not limited to this. The technical contents disclosed above can be applied to a small, portable electronic terminal for which it is difficult to protrude an antenna, and the electronic terminal is provided with an antenna that receives microwaves, particularly radio waves in the GHz band, according to the size of the electronic terminal. Even in an electronic watch, the antenna does not necessarily have to be used to correct the current date and time. It may be used only for positioning operations in an electronic watch with a positioning function. In addition, the specific configurations, contents and procedures of the processing operations, etc. shown in the above embodiments can be modified as appropriate without departing from the spirit of the present invention.

[0053] Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and its equivalents. The inventions described in the claims originally attached to this application are set forth below. The claim numbers in the appended claims are the same as those in the claims originally attached to this application.

[0054] [Note] <Claim 1> An antenna for receiving radio waves; A substrate having three or more electrodes; Connection parts connecting any two of the electrodes to the antenna, respectively; having The substrate is The antenna has at least two first electrodes connectable to a ground plane and at least two second electrodes connectable to a power supply point; When the first electrode is two or more, the first wiring distances from the first electrodes to the ground surface are different from each other. In the case where there are two or more second electrodes, the signal lines extending from the second electrodes have different second wiring distances. 1. An antenna receiving device comprising: <Claim 2> The antenna receiving device according to claim 1, characterized in that the substrate has two or more of either the first electrode or the second electrode, and has one or more other electrodes to which the other connection portion can be connected when any one of the one electrodes is connected to one of the connection portions. <Claim 3> The antenna receiving device according to claim 1 or 2, characterized in that the electrodes are arranged in a positional relationship in which the distance between the connection positions with the connection portion on the antenna can be changed depending on the combination of the first electrode that connects the ground plane and the antenna via the connection portion and the second electrode that connects to the feed point via the connection portion. <Claim 4> The antenna receiving device described in any one of claims 1 to 3, characterized in that the wiring includes intermediate wiring connecting the electrodes, and a path to the ground plane and a path of the signal line can each be set from the antenna via a plurality of the electrodes, and the first wiring distance and the second wiring distance change depending on the number of the electrodes passed through. <Claim 5> 5. The antenna receiver according to claim 4, wherein the intermediate wiring connects the electrodes with a bent line or a curved line. <Claim 6> At least a part of the electrodes serves as both the first electrode and the second electrode, The wiring has a cut portion that cuts either the path from the part of the electrodes to the ground plane or the path of the signal line. 6. The antenna receiving device according to claim 1, wherein the first and second antennas are arranged in a first direction and a second direction. <Claim 7> 7. The antenna receiver according to claim 1, wherein a path of the signal line from the second electrode is connected to a radio wave reception control driver via an impedance matching circuit. <Claim 8> 8. The antenna receiver according to claim 1, wherein the antenna is annular. <Claim 9> An antenna receiving device according to any one of claims 1 to 8, A timekeeping unit that counts the current time; a control unit that corrects the current time measured by the clock unit based on the radio waves received by the antenna receiving device; An electronic watch comprising: [Explanation of symbols]

[0055] 1. Electronic Clock 11 Display section 111 Display screen 112 Protective layer 12. Chassis 121 Through hole 122 Insertion groove 13 Bezel 14 Exterior materials 15 Screw 16 Connection 17 Back cover 21 Substrate 211 Shield Case 212 Circuit 213 Impedance Matching Circuit 214 Receiving circuit 22 Frames 23 Metal Frame 231 Leg-shaped part 24, 241, 242 connection pins 25 Leaf spring 30 Battery D1 lumped constant circuit G ground plane P1~P9 Connection pads

Claims

1. An antenna for receiving radio waves; A substrate having four or more electrodes; a connection portion that connects between the antenna and an electrode having wiring for connecting to a ground plane, and between the antenna and an electrode having wiring for connecting to an impedance matching circuit and / or a radio wave receiving circuit, among the electrodes; having The substrate is a first electrode having no wiring for connection to the impedance matching circuit and / or the radio wave receiving circuit, and having a wiring for connection to the ground plane; a second electrode having no wiring for connection to the ground plane and having wiring for connection to the impedance matching circuit and / or the radio wave receiving circuit; a third electrode disposed between the first electrode and the second electrode, the third electrode having both a wiring for connection to the ground plane and a wiring for connection to the impedance matching circuit and / or the radio wave receiving circuit; Equipped with the substrate has two or more third electrodes; At least one of a wiring for connecting to the ground plane and a wiring for connecting to the impedance matching circuit and / or the radio wave receiving circuit, which is provided in the third electrode, is an intermediate wiring connecting between the third electrodes, When the connection portion is connected to one of the third electrodes, a path to the ground plane or a path to the impedance matching circuit and / or the radio wave receiving circuit is set from the antenna via the plurality of third electrodes and the intermediate wiring.

1. An antenna receiving device comprising:

2. 2. The antenna receiver according to claim 1, wherein the intermediate wiring connects the third electrodes with a bent line or a curved line.

3. An antenna receiving device as described in claim 1 or 2, characterized in that the third electrodes have a path from the third electrodes to the ground surface and a cutting portion that cuts off either the impedance matching circuit and / or the radio wave receiving circuit from the third electrodes.

4. An antenna receiving device according to any one of claims 1 to 3, A timekeeping unit that counts the current time; a control unit that corrects the current time measured by the clock unit based on the radio waves received by the antenna receiving device; An electronic watch comprising:

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