JP3254880B2 - Wrist-mounted antenna device and wireless device equipped with this antenna device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arm-mounted antenna device mounted on an arm-mounted radio, and more particularly to an internal structure of the antenna device.

[0002]

2. Description of the Related Art Conventionally, a small portable wireless device generally employs a loop antenna as its antenna. Such an electric operation principle and structure are described in, for example, a paper "Loop Antenna for Small Portable Wireless Device". : National Technic
al Report Vol.19 No.2 Apr. 1973 ”. There is also an example in which a reactance element is incorporated at an intermediate position in the length direction of the loop antenna. In addition, when the frequency is relatively high, an inverted F antenna may be used.

On the other hand, as a small portable radio, development of an arm-mounted portable radio which can be worn on an arm or the like has been promoted.
No. 24 describes one using a loop antenna,
Japanese Patent Application Laid-Open No. 4-215222 discloses an apparatus using a shortened dipole antenna.

[0004]

However, it has been pointed out that when a loop antenna or a shortened dipole antenna is used in an arm-mounted portable wireless device or the like, the sensitivity directivity characteristic is reduced when the antenna is worn on a human body. Therefore, they have not yet achieved sufficient characteristics.

Here, the present inventor proposes to use a slot antenna for a wrist-mounted portable wireless device. When this slot antenna is mounted on a wrist-mounted portable wireless device or the like, a conductor plate functioning as a part of the antenna is provided inside the radio device body, and a conductor plate is also provided on the side of the wrist band. And a slot antenna is formed by connecting these conductor plates to each other. In the wrist-mounted portable wireless device using the slot antenna having such a structure, regardless of the band length of the wearer, the inductance value of the antenna is defined by the peripheral length of the groove and the width of the conductive plate, and the antenna is used. There is an advantage that a high antenna gain can be maintained even if the thickness of the arm of the person is different. Further, when the wrist-mounted portable wireless device is mounted on the wrist, the groove is open toward the outer periphery, so that the magnetic field component generated on the surface of the human body or the surface of the wrist can be efficiently detected. There is also.

However, in a situation where higher sensitivity is required for a wrist-mounted portable wireless device and the like, the sensitivity cannot be sufficiently improved by merely using a slot antenna. There is a point.

The first reason is that a feeding point, which is a connection point to a radio transmitting / receiving section of a wrist-mounted radio using a slot antenna, is inevitably located near the center in the length direction of the slot antenna. The power supply point is caused by being located in the wireless device main body in which various circuit components are arranged. In other words, the vicinity of the center of the slot antenna corresponding to the feeding point is a portion where the radiated energy of the radio wave is the largest, but around that, an insulating substance,
Various components composed of lossy substances, conductive substances, etc. are arranged, and among them, if parts composed of lossy substances or conductive substances are arranged in the direction of radio waves, radiated energy will be shielded or attenuated Because.

The second reason is that a circuit for processing a digital signal or a voltage booster circuit (DC)
/ DC converter) and other circuit components that generate noise signals that affect transmission / reception sensitivity have to be arranged around the center of the slot antenna. For this reason, the noise signal becomes a conduction noise transmitted along a power supply pattern or the like or a radiation noise radiated to the space, thereby deteriorating the sensitivity characteristics. Among them, the radiated noise may affect not only its own radio but also other radios depending on the circuit system.

A third reason is that a slot element is connected to a reactance element at a central position in the length direction to resonate at a specific frequency.
This is due to the fact that a portion located in the wireless device main body has high impedance. That is, since the Q of the antenna circuit increases, the antenna impedance when the arm is worn is shifted due to the influence of the human body, and the optimum matching state between the wireless transmitting / receiving unit and the antenna side is shifted, thereby lowering the transmitting / receiving sensitivity. It is. Here, an element may be added to the circuit side for the purpose of reducing Q, but such addition of parts is not preferable for the wrist-mounted portable wireless device because it hinders miniaturization.

[0010] The fourth reason is that in the wrist-mounted portable radio, a part of the antenna is fixed to the wrist-mounted band.
This is because, in some cases, an increase in electric resistance loss must be tolerated due to the restriction that the strength must be increased.

In view of the above problems, an object of the present invention is to
While using a slot antenna as the antenna body,
It is an object of the present invention to realize an arm-mounted antenna device capable of improving the structure and further improving the sensitivity, and a wireless device including the antenna device.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, when all of the above-mentioned reasons are solved, the structure of an arm-mounted antenna device and a radio equipped with the same are described below. Like First, on both sides of an apparatus main body having a circuit board on which a wrist band is connected on both sides and a circuit group is formed, an antenna body having a groove formed in a longitudinal direction is provided with a wrist band having a different length. Respectively. Further, the antenna body is provided with a resistance loss reducing structure for reducing the electrical resistance to the high-frequency current at the end portion to reduce the resistance loss. Further, with respect to the antenna body, in the apparatus main body, one side of a portion opposed to the circuit board at a position above the circuit board is connected to a reference potential side of a high-frequency amplifier circuit included in the circuit group. The configuration is such that a connection is made to the signal potential side of the high-frequency amplifier circuit at a position distant from the noise generation source included in the circuit group as compared with. Also, for the wrist band,
The thickness on the back side is increased near the position where the reactance element is connected to the antenna body.

With this configuration, since there is no circuit board on the front side of the antenna, radio waves radiated from the antenna are not blocked. Also, of the antenna body,
The side (high impedance side) connected to the signal potential side of the high-frequency amplifier circuit is separated from the noise signal generation source included in the circuit group, and the vicinity of the noise signal generation source is on the low impedance side of the antenna body. The noise signal does not enter the antenna body. Furthermore, since the antennas are connected with different lengths on both sides of the device body, the feeding point is set at an optimum position deviated from the connection position of the reactance element with respect to the center position of the antenna, that is, a low impedance position. Even in this case, the power supply point is in the apparatus main body, and the optimum impedance junction can be realized. In the vicinity of the connection position of the reactance element with respect to the antenna body (high impedance portion), the thickness of the back surface of the wrist band is large, and the antenna body is also provided in the apparatus main body.
Since it is located above the circuit board and located at the maximum distance from the arm, it is possible to reduce the influence of the antenna on the human body in the mounted state. Moreover, the resistance loss of the antenna body is reduced. As described above, the reasons for preventing the sensitivity from being improved as described above can be eliminated, and thus the sensitivity is improved.

In the present invention, when an object that blocks radio waves radiated from the antenna body is placed below the antenna to enhance the sensitivity, a circuit board on which a wrist mounting band is connected and a circuit group is formed is mounted inside. And an antenna body fixed to the device body and the wrist band and formed with a groove in the length direction, and the antenna body is disposed at a position above the circuit board in the device body. Configuration.

In this case, it is preferable to dispose a reflecting member for increasing the antenna gain by an image effect in the apparatus main body at a position below the antenna body. Further, when a display unit capable of displaying information is provided on the front surface side of the device main body, the antenna body may be disposed on both sides of the display unit in the device main body. Alternatively, the antenna body may be formed on the display unit as a transparent conductive thin film layer.

In the present invention, an antenna body having a groove formed in a longitudinal direction is fixed to a side surface of an outer frame member of an apparatus body as a structure in which an object for blocking radio waves is not arranged on the surface side of the antenna body. Alternatively, the groove may face the outer periphery of the outer frame member.

In the present invention, in order to improve the sensitivity by eliminating the influence of the noise signal, one side of the portion of the antenna body opposed to the device body via the groove is connected to the high-frequency amplifier included in the circuit group. The circuit is connected to the signal potential side of the high-frequency amplifier circuit at a position farther from the noise signal generation source included in the circuit group than the other side connected to the reference potential side of the circuit.

Here, the other side may be connected to a reference potential side via a reactance element. In addition, the other side may be electrically connected to a power supply element for driving a circuit group or a shield covering a noise signal generation source for the purpose of lowering the impedance. Further, it is preferable that the antenna body is arranged at a position above the circuit board and a local oscillation circuit included in the circuit group is formed on the lower surface side of the circuit board. In this case, the local oscillation circuit is set to the same potential. It is preferable to adopt a configuration surrounded by a member.

In the present invention, when the feeding point is set at an optimum position apart from the connection position of the reactance element, the antenna plate constituting a part of the antenna body is arranged so that the feeding point is located in the apparatus main body. A configuration using antenna plates connected to both sides of the main body with different lengths is adopted.

Here, of the antenna plates, the shorter antenna plate is arranged on the side of the wrist band to which the buckle for connecting the wrist bands is attached, and the longer antenna plate is attached. It is preferable to dispose the pin on the side of the wrist on which the stop hole for hooking the pin of the buckle is formed. In this case, the stop hole is formed at a position corresponding to the center of the groove in the width direction. In some cases, the groove has an extended portion having a groove width corresponding to the inner diameter of the stop hole at a portion corresponding to the position where the stop hole is formed. Further, it is preferable that the reactance element is built in the side of the wrist band to which the longer antenna plate is fixed. In this case, in the longer antenna body, the portions facing each other via the groove near the center in the longitudinal direction of the antenna body are protruded inward, thereby forming an overlapping portion of the antenna plate, It is preferable to form a capacitive element as a reactance element by using this overlapping portion.

In the present invention, for the purpose of preventing the effect of the human body when the arm is worn, a reactance element is connected to the antenna body over the groove at the center position in the longitudinal direction, and the antenna body is connected to the antenna body. An opening is formed such that the degree of formation increases from the terminal side toward the connection position of the reactance element.

Alternatively, the thickness of the back surface side of the wrist band is increased from the distal end toward the connection point of the reactance element to the antenna body. In this case, a protrusion is formed on the back side of the wrist band so as to increase toward the vicinity of the connection position of the reactance element to the antenna body from the end side, and the thickness of the back side of the wrist band is reduced. It is preferable to increase the thickness on the side of the connection position of the reactance element to the antenna body.

In the present invention, for the purpose of reducing the resistance loss with a simple configuration, the antenna body is provided with a resistance loss reducing structure for reducing the electrical resistance to the high-frequency current at the terminal portion to reduce the resistance loss.

Here, as the antenna loss reduction structure,
A structure in which the rolling direction in the rolling process and the direction of the current are matched on the end surface of the antenna body formed by rolling the metal plate, or a metal layer having good electrical conductivity on the end surface of the antenna body Can be adopted.

In the present invention, it is preferable to laminate a high dielectric constant material layer on at least one side of the antenna so that the antenna can cope with high-wavelength radio waves without lengthening the antenna.

[0026]

【Example】

Embodiment 1 FIG. 1 is an explanatory view showing the appearance of an arm-mounted portable wireless device (arm-mounted antenna device) according to Embodiment 1 of the present invention, and FIG.
Is a plan view around the wireless device main body, and FIG. 3 is a longitudinal sectional view around the wireless device main body.

In these figures, in the wrist-mounted portable wireless device 1 of this embodiment, two bands 2a and 2b (arm-worn bands) are attached to both sides of the wireless device main body 1a (device main body). The antenna 13 is configured using the antenna plate 11 fixed to these bands 2a and 2b. In addition, the end of the band 2a and the end of the band 2b are connected by a clasp 1f, and there is no need to electrically connect the antenna plates 11 to each other.

As shown in FIG. 2, a data display device for displaying various kinds of information is provided on the front side of the wireless device main body 1a (the outer surface side when the wrist-mounted portable wireless device 1 is mounted on the arm). 3 and conductor plates 4a and 4b for forming a part of the antenna body. Here, the band 2a,
The antenna plate 11 (11a, 11a) fixed to 2b
b, 11c, 11d), the antenna plate 11a and the antenna plate 11b are electrically connected by the conductor plate 4a, and the antenna plate 11c and the antenna plate 11d are electrically connected by the conductor plate 4b. Therefore, the antenna body 13 as a slot antenna having the groove 13c formed therebetween is configured.

As shown in FIG. 3, the conductor plates 4a and 4b, the circuit board 5, the conductive board 5a, and the conductive board 4a are arranged from the upper side (the side where the data display device 3 is located) to the lower side. Reflective plate 6, battery 8 and back cover 9 are arranged. Each circuit group is mounted on the circuit board 5, and a high-frequency ground pattern (not shown) is also formed on the surface of the circuit board 5. Here, when a multilayer board is used as the circuit board 5, a high-frequency ground pattern is formed in an inner layer portion thereof. The reflection plate 6 is electrically connected to one of the poles of the battery 8 via the terminal plate 7. As a result, the high-frequency ground characteristics on the lower side of the conductor plates 4a and 4b are ensured. The battery 8 can be easily replaced by removing the back cover 9. The back cover 9 is electrically connected to one pole of the battery 8 and is also electrically connected to the circuit board 5 via a terminal plate (not shown). The circuit board 5 and the reflector 6 are electrically connected by two connectors 12b.

In this example, the circuit board 5 is disposed on the lower surface side of the conductor plates 4a and 4b of the antenna body 13,
The circuit board 5 and the antenna 13 are connected to two terminal plates 12a.
Are electrically connected by This connection part is a power supply part to the antenna 13 or a connection point of the reactance element, and the power supply part is a conductor plate 4 near the terminal plate 12a.
a and 4b. For this reason, in the antenna body 13,
The antenna plates 11a and 11b (or the antenna plates 11
c, 11d), the portion near the power supply portion or the conductor plate 4a (or the conductor plate 4b) is a portion where the high-frequency impedance is high and the radiation of radio waves is the strongest.

In the wrist-mounted portable wireless device 1 configured as described above, since radio waves are transmitted and received on the front side (the data display device 3 side), the radiant energy of the radio waves is transmitted to the data display device 3 side. It is configured to have directivity and its loss is reduced.

That is, a circuit board 5 having a high-frequency ground pattern surface and a reflection plate 6 are arranged on the lower surface side of the conductor plates 4a and 4b so that they function as a reflector, and the directivity is improved. It is concentrated on the data display device 3 side. In the wrist-mounted portable wireless device 1 of this example, when it is worn on the arm, the arm comes into contact with the back cover 9, but the antenna body 13 is separated from the arm by the back cover 9 and the reflection plate 6. Since it is shielded, it is not affected by the human body, so there is no impedance shift of the antenna and the sensitivity is high.

This effect is combined with the operation of the wrist-mounted portable wireless device 1 of this embodiment, and FIGS. 4 (a), (b) and 5
It will be described in detail with reference to FIG.

FIG. 4A is an explanatory diagram showing the general directivity when a slot antenna is used, and FIG. 4B is an explanatory diagram showing the directivity of the antenna of this embodiment. FIG. 5 is a block diagram showing a circuit configuration for operating the wrist-mounted portable wireless device of the present invention as an individual selective calling wireless device.

First, in FIGS. 4 (a) and 4 (b), the antenna 13 has a groove 13c formed along the center line thereof. , A capacitor 18 (reactance element) is connected so as to straddle the groove 13c. Here, the antenna body 13 functions as a slot antenna by selecting a capacitor having an appropriate capacity as the capacitor 18. Note that the capacitor 18 is mounted on the circuit board 5.

In such a slot antenna, when the magnetic field on the plane of polarization of the radiated radio wave is indicated by an arrow H and the electric field is indicated by an arrow E, the radiation pattern characteristic of the slot antenna is shown by two solid lines in FIG. As shown at 17, the groove 13
It tends to spread in two directions with a component perpendicular to c. The emission center of the radio wave is at the center of the groove 13c. This characteristic is the same as the radiation characteristic when the directions of the electric field and the magnetic field are exchanged with each other, assuming a dipole antenna instead of the slot antenna, which is a fact well known to those skilled in the art. .

On the other hand, in this example, the antenna 13
Is a slot antenna, which is a magnetic current antenna (magnetic field sensitive antenna). Therefore, if the ground plate 10 is provided in a state of being parallel to the antenna body 13 and extending in the center thereof, FIG.
As shown by the solid line 19 in FIG.
The characteristics are improved as compared with the characteristics shown in FIG. 4A, and the antenna gain is increased. That is, in this example, the circuit board 5 and the reflection plate 6 are used as the ground plate 10 by the antenna 13 (the conductor plate 4).
a, 4b) are arranged on the lower surface side so as not to hinder the emission of radio waves from the antenna body 13 to the front surface side. Also,
The circuit board 5 and the reflector 6 as the ground plate 10 increase the directivity gain to about twice by the effect (image effect) as a reflector on the surface side. Further, when the wrist-mounted portable wireless device 1 is mounted on the wrist, the wrist is on the lower surface side of the circuit board 5 and the reflection plate 6, and the wrist itself also functions as the ground plate 10. This phenomenon is the result of actively using the magnetic field near the human body.

The high-frequency amplifier circuit 14 is connected to one of the connection points of the capacitor 18, and the other connection point is
It is connected to ground 15. High frequency amplifier circuit 14
Is configured inside the transmission / reception radio section 102 of the circuit 100 shown in FIG. In this circuit 100, the antenna 1
Transmission / reception radio section 102 and waveform shaping circuit 10
3. A power supply control circuit 104 for controlling power supply to these circuits and a control unit 105 for controlling the power supply control circuit 104 are formed. In this example, the control unit 1
P-ROM (programmable read-only memory) in which unique call numbers compared in 05 are recorded
106, a RAM (random access memory) 109 storing transmission information associated with the fixed call number, an LCD drive circuit 110 for controlling an LCD 112 (liquid crystal display) of the data display unit 3 for displaying information. , LC
An oscillation circuit 111 for transmitting a clock signal used for controlling the D drive circuit 110 is formed. These power supply control circuit 104, control unit 105, RAM 10
9. The message processing unit 114 is composed of the LCD drive circuit 110 and the oscillation circuit 111. Also,
The message processed by the message processing unit 114 is
An alarm drive circuit 107 for displaying at D112 and transmitting that a message is stored, and an alarm device 10 such as a buzzer, an LED or a vibrator.
8. An external operation unit 113 for operating the wireless device is also configured.

Here, in the case of the single superheterodyne system, the transmission / reception radio section 102 transmits an RF amplifier 201 (high-frequency amplifier circuit) to the antenna 13 as schematically shown in a block diagram of FIG. 14), a mixer 202, and an IF amplifier 203,
The frequency division ratio signal corresponding to the desired frequency is
When output to the prescaler 207 of the L200, the prescaler 207 outputs the VCO 208 based on the frequency division ratio signal.
, And outputs a 51 kHz square wave signal to the phase comparator 209, for example. Reference oscillator 21
0 is always oscillating at, for example, 50 kHz and 51
The phase comparator 209 outputs a square wave signal having a pulse width corresponding to the 1 kHz shift because there is a shift of 1 kHz between the square wave signal and the square wave signal of 1 kHz. And This DC voltage signal is applied to the VCO 208 to change the desired frequency output from the VCO 208 to the mixer 202. Therefore, in the single superheterodyne method, the received high-frequency signal and the output of the oscillator are mixed by the mixer 2.
After mixing at 02 and converting to an intermediate frequency corresponding to these differences, the received signal is demodulated. Here, the intermediate frequency is generally 455 kHz. The frequency of the reference oscillator 210 is, for example, 2
〜3 MHz in some cases. The waveform shaping circuit 103 shown in FIG. 5 corresponds to the detector 204 in FIG. Further, the control unit 105 shown in FIG. 5 integrates the decoder 205 and the CPU 206 in FIG. 6A.

On the other hand, in the direct conversion method, as schematically shown in a block diagram of FIG. 6B, an RF amplifier 301 (high-frequency amplifier circuit 14), a mixer 302, a low-pass Filter 30
3, detector 304, decoder 305, and CPU3
06, unlike the single superheterodyne system, no conversion to an intermediate frequency is performed.
That is, it can be considered that the intermediate frequency is 0 Hz, and the low-pass filter 303 is a filter that passes a baseband frequency near 0 to 10 kHz. Therefore, in the direct conversion method, the line frequency becomes equal to the oscillation frequency of the local oscillator 307, and a signal enters the baseband under this condition.

The RF20 shown in FIGS. 6A and 6B
In the following description, reference numerals 1 and 203 correspond to, for example, the high-frequency amplifier circuit 14 in FIG.
The output point of 203 corresponds to the terminal 16 in FIG.

Referring again to FIG. 5, a signal transmitted at a predetermined line frequency is demodulated by the transmission / reception radio section 102 via the antenna 13 and converted into a rectangular wave by the waveform shaping circuit 103. Power is supplied to the waveform shaping circuit 103 and the transmission / reception radio section 102 only during the time of receiving a signal based on the control of the control section 105 and the power supply control circuit 104. The control unit 105 generates a battery saving timing signal for managing the power supply, controls the power supply control circuit 104, and performs bit synchronization and frame synchronization with the received signal. Further, the comparison between the unique calling signal recorded in the P-ROM 106 and the received signal supplied from the waveform shaping circuit 103 is performed with error control, and whether the recorded unique calling signal is called or not is determined. A determination is made. Further, it has a measurement function of forming a signal from the oscillation circuit 111 which is a reference signal source such as a crystal.

Therefore, when the call is confirmed, the message data is received following the unique call signal and the RAM 10
9 is stored. Then, the alarm device 108 notifies the user of the call via the alarm drive circuit 107. The message stored in the RAM 109 is output to the LCD drive circuit 110 via the control unit 105 by operating the external operation unit 113 including switches, and the LCD drive circuit 110 The message is displayed on the LCD 112 while being controlled based on the clock signal thus obtained.

As described above, in the wrist-mounted portable wireless device 1, since the feeding point is set at the center of the antenna 13, the portion where the radiated energy of the radio wave is maximum is narrow. It will be located inside the main body 1a. Here, since various components made of an insulating material, a loss material, a conductive material, and the like such as the circuit board 5 are arranged inside the wireless device main body 1a, the antenna 1
When the circuit board 5 and the like are arranged in the radiation direction of the radio wave from 3, the radiation pattern is divided into four as shown by the solid line 21 in FIG.

On the other hand, in the present example, as shown in FIG.
Since the radiation direction of the radio wave is not blocked, the radiation energy of the radio wave is not blocked or attenuated. Further, by arranging the circuit board 5 and the reflector 6 on the lower surface side of the antenna body 13, the directivity can be further enhanced by their image effect. Therefore, the radiation pattern of the wrist-mounted portable wireless device 1 of the present example shows high directivity toward the front surface side of the wireless device main body 1a as indicated by the solid line 20. In addition, by arranging the circuit board 5 and the reflector 6 on the lower surface side of the antenna body 13, the influence from the human body can be shielded.
The impedance matching between the wireless transmitting / receiving unit side and the antenna body side is not lost.

Embodiment 2 In the embodiment 1, when the circuit board 5 is arranged on the lower surface side of the conductor plates 4a and 4b, the conductor plates 4a and 4b are arranged between the circuit board 5 and the data display device 3. However, in this example, as shown in FIG. 9, the conductor plates 4a and 4b are arranged on the upper surface side of the data display device 3, and the conductor plates 4a and 4b
Is the front side of the wireless device main body 1a (the side of the data display device 3)
Is located on the back side of the case 1c covered by the

In this embodiment, the conductor plates 4a and 4b are arranged outside the data display device 3 as shown in FIG. 10 so that the conductor plates 4a and 4b do not cover the data display device 3. Have been. Therefore, in this example, the radio wave radiated from the antenna body 13 is not provided on the upper surface side of the antenna body 13, not only the circuit board 5 but also the data display device 3.
Since there is no attenuation, the radiant energy can be further increased.

The conductor plate 4 on the side of the radio main unit 1a
a, 4b and the antenna plate 11a on the side of the bands 2a, 2b
11d, in addition to the structure in which they are connected around the wireless device main body 1a, the conductive plates 4a, 4d
A structure in which b and the antenna plates 11a to 11d are integrally formed can also be adopted. As shown in FIG. 11A, the ends 4g of the conductor plates 4a and 4b are protruded from the side of the wireless device main body 1a, and the antenna plate 11a is
11d can be adopted inside the bands 2a, 2b.

Further, as shown in FIG. 11 (b), the outer frame 1b of the radio device main body 1a and the conductor plates 4a, 4b are integrally formed, and the conductor is formed along the inner peripheral surface of the outer frame 1b. Plate 4a,
4b may be employed.

Third Embodiment FIG. 12 is a plan view of a wrist-mounted portable wireless device 30 according to a third embodiment around a wireless device main body. The wrist-mounted portable wireless device 30 of the present embodiment and the wrist-mounted portable wireless devices according to the fourth to eighteenth embodiments described below each have a wrist-mounted portable wireless device according to the first embodiment. Since the portable radio device is the same as the portable radio device, portions having common functions are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the wrist-mounted portable radio device 30 of the present embodiment, the radio device main body 1a is a hand-type timepiece, and a hand 23 indicating time,
A conductive plate 4 having a dial 24 and a crown 25 is provided on the front side (so-called bezel) of the outer frame 30a of the dial 24.
a, 4b are formed. The conductor plates 4a and 4b are respectively connected to the antenna plates 11a to 11a inside the bands 2a and 2b.
The conductor 13a is electrically connected to the conductor 11d, and the conductor plates 4a, 4b and the antenna plates 11a to 11d form an antenna 13 (slot antenna) having a groove 13c.

In the wrist-mounted portable wireless device 30 thus configured, the conductor plates 4a and 4b are also connected to the wireless device main body 1
It is on the front side (dial side) of a. Here, dial 24
Is a non-metallic material, and does not block radio wave radiation from the conductor plates 4a and 4b. The conductor plates 4a and 4b are located on the upper surface side (the dial side) with respect to the circuit board 5 disposed inside the wireless communication device main body 1a. Therefore, for the antenna 13, since the feeding point is set on the conductor plates 4 a and 4 b corresponding to the center in the length direction, a portion where the radiation energy of the radio wave is maximum is the It will be located on the front side. Therefore, according to the wrist-mounted portable wireless device 30 of the present example, the radiation energy of the radio wave does not attenuate. Further, the circuit board 5 and the like disposed on the lower surface side of the antenna body 13 function as a reflector, and the directivity can be improved. In addition, since the influence from the human body can be shielded by the circuit board 5 or the like, even when the user wears his / her arm, the alignment between the wireless transmitting / receiving unit and the antenna does not shift.

Fourth Embodiment FIG. 13 is a plan view of a wrist-mounted portable wireless device 35 according to a fourth embodiment around a wireless device main body.

Also in the wrist-mounted portable radio device 35 of this embodiment, when forming a part of the antenna body 13 inside the radio device main body 1a, the conductor plates 4c to 4f are formed on the outer frame 35a, Two rows of thin-film conductive patterns 29a and 29b are formed on the display surface 3a of the data display device 3. Here, among the conductor plates 4c to 4f, the corresponding conductor plates are electrically connected to each other by the conductive patterns 29a and 29b. Each of the conductor plates 4c to 4f is a band 2
a, 2b, are electrically connected to the antenna plates 11a to 11d, and these conductive patterns 29a,
29b, conductor plates 4c-4f, and antenna plate 11a
To 11d, the antenna body 1 in which the groove 13c is formed
3 (slot antenna). In the data display device 3, the segment electrodes 32 and the circuit patterns 31 for applying a voltage for driving the segment electrodes 32 are formed together with the conductive patterns 29a and 29b.

Here, the display surface 3a of the data display device 3
Is located on the front side of the radio main unit 1a, the conductive patterns 29a and 29b are also located on the front side of the radio main unit 1a, and the circuit board 5 and the like in the radio main unit 1a are
It will be located on the lower surface side of the conductive patterns 29a and 29b. Further, since the conductive patterns 29a and 29b are thin films and have high light transmittance, the data display device 3
On the other hand, even if it is formed in a wide area, display on the data display device 3 is not hindered.

In the wrist-mounted portable wireless device 35 configured as described above, since the feeding point is set to the conductive patterns 29a and 29b corresponding to the center of the antenna 13, the radiation energy of the radio wave is reduced. The maximum portion is located on the outermost surface of the wireless device main body 1a. Therefore, according to the wrist-mounted portable wireless device 35 of the present example, the radiation energy of the radio wave is not attenuated, and the image effect of the circuit board 5 disposed on the lower surface side of the antenna 13
Directivity can be further improved. Example 1
In the same manner as described above, the influence from the human body can be shielded, so that even when the user wears his / her arm, the matching state between the wireless transmitting / receiving unit side and the antenna body side does not shift.

The conductive patterns 29a and 29b may be formed in the uppermost layer, or may be formed in an intermediate layer or a lower layer in the circuit patterns formed in multiple layers in the data display device 3.

Embodiment 5 FIG. 14A shows an arm-mounted portable wireless device 38 according to this embodiment.
14B is a plan view around the wireless device main body, and FIG. 14B is a side view thereof.

In the wrist-mounted portable wireless device 38 of the present embodiment, the wireless device main body 1a is a hand-type timepiece, and the hands 23 indicating the time,
It has a dial 24 and a crown 25, and the entire antenna body 39 is formed on the outer peripheral side surface of the outer frame 38 a of the dial 24.

As shown in FIG. 14 (b), the antenna body 39 is a slot antenna having a groove 39c directed to the outer periphery with respect to the outer frame 38a, and the bands 2a, 2b connected to the radio main unit 1a. Are not formed. That is,
The antenna body 39 has an end 39d on the side of the band 2b in the outer frame 38a, and makes a round around the outside of the outer frame 38a from there, so that the opposite end 39e returns to the band 2b. Are located.

In the wrist-mounted portable wireless device 38 configured as described above, since the antenna body 39 is located outside the wireless device main body 1a, the radio wave radiated from the antenna body 39 is blocked outside. There is nothing. In particular, the antenna body 39
, A feeding point is set at the center position in the length direction, that is, on the side of the band 2a, and there is nothing to block the radiated radio wave at this portion as well. Therefore, according to the wrist-mounted portable wireless device 38 of the present example, the radiation energy of the radio wave is
It does not attenuate and exhibits high sensitivity due to the image effect of the circuit board and the outer frame 38a disposed inside the wireless device main body 1a.

Embodiment 6 FIG. 15 is an external view showing the overall structure of the wrist-mounted portable radio 40 of this embodiment, FIG. 16 is a sectional view taken along the line XY, and FIG. It is sectional drawing in a line.

In these figures, bands 2a and 2b for attaching the radio device main body 1a of the wrist-mounted portable radio device 40 of this embodiment to the arm are attached to the radio device main body 1a. A data display device 3 and a switch 1s (external operation unit) are arranged on the front side. Band 2a
A buckle 67 as a means for connecting the bands 2a and 2b is attached to a distal end of the buckle. A hole 69 for inserting a positioning pin 68 of the buckle 67 is formed on the side of the band 2b. The band 2a is provided with a band retainer 2g for holding a surplus portion of the band 2b.

Such a coupling mechanism is generally employed in a wristwatch or the like. However, in a conventional wrist-mounted portable radio using a loop antenna, it is necessary to electrically connect the ends of the antenna. Because of this, it could not be adopted. On the other hand, in this example, since a slot antenna is employed, it is not necessary to electrically connect the ends of the antenna, and thus such a simple coupling method can be employed. In the loop antenna, since the buckle side is electrically connected to the antenna body, it is necessary to take measures against the influence of static electricity from the buckle side to the wireless device main body. Since it is insulated and separated, there is no need to take countermeasures against static electricity, and it can be handled like a normal wristwatch.

As shown in FIG. 16, the antenna plates 11a to 11d are built in the bands 2a and 2b. As will be described later, the antennas 11a and 11b are connected to conductive members disposed inside the radio main unit 1a. The antenna plates 11c and 11d are conductively connected to the body plate 4a, and the antenna plates 11c and 11d are conductively connected to the conductive plate 4b disposed inside the radio device main body 1a.

In FIGS. 16 and 17, in the radio main unit 1a, the circuit board 5 is horizontally disposed inside the case 401, and its upper surface side (the side where the data display device 3 is located).
In, the switch 1s is connected via the conductive rubber 406. A panel frame 3a is provided on the upper surface side of the circuit board 5.
The data display device 3 is formed inside the panel, and the panel 3b is conductively connected to the circuit board 5 via the conductive rubber 407. Note that a protective lens 3d is disposed on the upper surface side of the panel 3b, and an optical reflector 3c for the panel 3b is disposed between the panel 3b and the circuit board 5.

Further, conductor plates 4a and 4b are arranged above the circuit board 5, and the ends of the conductor plates 4a and 4b are connected to the antenna plate via connection pins 405 penetrating the case 401. The ends of 11a to 11d are conductively connected. The conductor plates 4a and 4b are conductively connected to the front side of the circuit board 5 via the terminal plate 12a. Note that FIG.
17 and FIG. 17, only a part of the conductor plates 4a and 4b is shown. However, the conductor plates 4a and 4b are, as shown in the upper corner of the panel frame 3a in FIG. The conductor plate 4a is formed along the antenna plate 1
1a and the antenna plate 11b are conductively connected. Also,
The conductor plate 4b includes an antenna plate 11c and an antenna plate 11d.
And are electrically connected.

On the lower surface side of the circuit board 5, the battery 8 is mounted in the battery frame 403, and the negative electrode side thereof is connected to the electrode 404.
Is connected to the ground pattern of the circuit board via the. The case 401 has its back side closed with the back cover 9.

Here, in order to configure the radio device circuit 102 shown in FIGS. 5 and 6, on the upper surface side of the circuit board 5, as shown in FIG. A digital circuit 5a is formed by mounting a decoder 503, a CPU 504, a digital circuit component 506, and the like. On the lower surface side of the circuit board 5 (the side of the back cover 9),
As shown in FIG. 16, the circuit element 1 configuring the high-frequency amplifier circuit 14 (RF amplifier) from the X direction to the Y direction
4a, RF-IC 513, analog circuit parts 519, etc. are mounted, and as shown in FIG.
Toward the direction, chip capacitor 514, tantalum capacitor 515, RF-IC 513, shield case 4
An analog circuit 5b is formed by mounting a local oscillation circuit element 512a, a local oscillation circuit board 512b, a crystal oscillator 511 (reference oscillator), and the like covered by 8. The positional relationship between them will be described in detail with reference to FIGS.

FIG. 18 is a schematic plan view schematically showing the structure on the upper surface side of the circuit board, and FIG. 19 is a schematic bottom view schematically showing the structure on the lower surface side of the circuit board.

As shown in FIG. 18, on the upper surface side of the circuit board 5, conductor plates 4a and 4b are arranged along the outer peripheral edge of the circuit board 5, and the ends thereof are connected to the circuit board 5 by contacts 16a to 16d. It is connected. Among these contacts 16a to 16d, a capacitor 18 is interposed between the contacts 16c and 16d. A chip capacitor 505, a decoder 503, and a CPU for configuring the digital circuit 5a are provided on the upper surface side of the circuit board 5 from the U direction to the Z direction.
504, DC-DC converter 501, E2-PROM
The digital circuit 5a processes digital data such as a data decode circuit, a central processing circuit, a data storage circuit, a data display circuit, a phase control circuit, and a phase comparator used in a wireless device. All the circuits are configured. Further, a panel driving terminal 407a of the data display device 3 is also formed.
Here, the DC-DC converter 501 is arranged at a position deviated in the Z direction of the circuit board 5, and is located closer to the conductor plate 4a than to the conductor plate 4b.

On the other hand, on the lower surface side of the circuit board 5, as shown in FIG. 19, a tantalum capacitor 51 for forming the analog circuit 5b extends from the U direction to the Z direction.
5, high frequency amplifier circuit 14, chip capacitor 514, R
An F-IC 513, a local oscillation circuit 512 covered with a shield case 47, and a crystal oscillator 511 are arranged. The oscillation circuit 512 and the crystal oscillator 511
It is arranged on the direction side. On the lower surface side of the circuit board 5, a contact 16e with the high-frequency amplifier circuit 14 and a contact 16f connected to the ground 15 via a capacitor 46a are formed. Here, the contact 16e is connected to the circuit board 5
The high-frequency amplifier circuit 14 is conductively connected to the conductor plate 4b because it is conductively connected to the contact 16a on the front surface side of the device through a through hole. On the other hand, since the contact 16e is conductively connected to the contact 16b on the front surface side of the circuit board 5 through the through hole, a ground potential is applied to the conductor plate 4a. A buzzer 516 and a backup capacitor 5 are provided on the lower surface side of the circuit board 5.
19 is also implemented.

The wrist-mounted portable wireless device 4 having such a configuration
0, the antenna plates 11a to 11d fixed to the two bands 2a and 2b and a conductive member disposed inside the radio device main body 1a as schematically shown in FIG. The antenna body 13 in which the body plates 4a and 4b are connected to each other and a groove 13c is formed therebetween.
(Slot antenna) is configured. Here, the conductor plate 4a is connected to the ground 15 of the circuit board 5 at the contact point 16b. On the other hand, the conductor plate 4b
Is connected to the high-frequency amplifier circuit 14 at the contact 16a. Further, the high-frequency amplifier circuit 14 is also connected to the ground 15 of the circuit board 5 and is shown in a state of being electrically connected to the conductor plate 4a. Therefore, the conductor plate 4
a and 4b are in an unbalanced relationship and are in a state where a potential difference occurs.

Here, in the digital circuit 5a, the DC-DC converter 501 serving as a noise signal generation source has a structure arranged near the conductor plate 4a. Also,
In the analog circuit 5b, a crystal oscillator 511 (here, a natural frequency of 90 MHz) and a local oscillation circuit 512, which are sources of noise (interference) signals, are also arranged near the conductor plate 4a. Is located at a position distant from noise signal generation sources such as the crystal oscillator 511, the local oscillation circuit 512, and the DC-DC converter 501. Therefore, even if a noise signal is radiated from the local oscillation circuit 512, the DC-DC converter 501, or the like, the conductor plate 4a is connected to the ground 1
5 and low impedance at high frequency,
No noise signal enters the conductor plate 4a. On the other hand, the conductor plate 4b has a high impedance in terms of high frequency, but since the conductor plate 4b is located at a position away from the digital circuit 5a, no noise signal enters the conductor plate 4b.

In particular, in a radio device employing a direct conversion detection method such as direct conversion, the local oscillation frequency is very close to the reception frequency, and the local oscillation of the radio device easily enters the antenna 13 as noise. In this case, the wrist-mounted portable wireless device 40 is close to the low-impedance conductive plate 4a at high frequency and is close to the high-impedance conductive plate at high frequency. Since the local oscillation circuit 512 is configured at a position far from the terminal 4b, that is, at a position similar to the DC-DC converter 501 of the digital circuit 5a, a noise signal radiated therefrom is not radiated to the outside.

In addition to the DC-DC converter 501 and the local oscillation circuit 512, the message processing unit 114, the P-ROM 106, the alarm drive circuit 107, etc. of the circuit 100 shown in FIG. Therefore, these circuits can also prevent noise signals from entering the conductor plate 4b by keeping them far away from the conductor plate 4b having high impedance in high frequency.

Further, as shown in FIG. 21, the characteristic points of the vertical section are schematically shown in the main body 1a of the radio device, similarly to the wrist-mounted portable radio device 1 according to the first embodiment. , 4
A circuit board 5 having a high-frequency ground pattern surface is located on the lower surface side of b, and the circuit board 5 functions as a reflector. In addition, in the wrist-mounted portable wireless device 40 of this example, when the wrist is worn on the wrist, the arm comes into contact with the back cover 9.
And is shielded from the arm by the reflection plate 6, so that it is not affected by the human body.

Embodiment 7 FIG. 22 (a) is a cross-sectional view of the wrist-mounted portable wireless device 45 of this example around the wireless device main body.

In the wrist-mounted portable radio device 45 of this embodiment, similarly to the wrist-mounted portable radio device 1 according to the first embodiment, two bands 2a, 2b (arms) are provided on both sides of the radio device main body 1a. Antenna plates 11a-1a fixed to a mounting band)
1d, and a conductor plate 4 disposed inside the radio device main body 1a.
a, 4b are connected to each other, and a groove 13c is
The antenna body 13 (slot antenna) in which is formed is formed. Inside the wireless device main body 1a,
A circuit board 5 having a high-frequency ground pattern surface and a reflection plate 6 are arranged on the lower surface side of the conductor plates 4a and 4b to function as a reflector, and directivity is concentrated on the data display device 3 side. Let me. Also, with the wrist-mounted portable radio 45 of this example, the arm comes into contact with the back cover 9 when the wrist is attached to the arm. Since it is shielded from the arm by the plate 6, it is not affected by the human body.

The conductor plate 4b is connected to the high-frequency amplifier circuit 14 at the contact 16a similarly to the wrist-mounted portable radio device 40 according to the sixth embodiment.
It is connected to the ground 15 of the circuit board 5. On the other hand, the conductor plate 4a is connected to the ground 15 of the circuit board 5 by the contact 16b.
a, and the conductor plates 4a, 4b are in an unbalanced relationship and are in a state where a potential difference occurs. Further, the conductor plate 4a has a digital circuit 5 compared to the conductor plate 4b.
It is arranged near a noise signal generation source such as the DC-DC converter 501 shown in FIG.

In this example, the conductor 4a is used as the radio device main body 1a.
Are divided into two parts inside, and the ends 4h, 4h
i is connected to the negative electrode (ground potential) of the battery 8 (button battery). For this reason, the conductor 4a has a lower impedance.

In the wrist-mounted portable radio 45 constructed as described above, the digital circuit 5a includes a noise signal source such as the DC-DC converter 501. The low impedance conductor plate 4a is arranged in the vicinity, and the high impedance conductor plate 4b is arranged at a position distant from the conductor plate 4a, so that the noise signal radiated from the digital circuit 5a is transmitted to the conductor plate 4a.
The same effects as those of the sixth embodiment are obtained, such as hardly entering a and b.

When the ends 4h and 4i of the conductor 4a are connected to each other via the battery 8, from the viewpoint of a circuit handling a high-frequency signal, they may be connected via the positive electrode of the battery 8. In the case, the contact 16b of the conductor plate 4a
As shown by a dotted line 46, a capacitor (reactance element) having a low impedance in a high frequency region is inserted between the circuit board 5 and the ground 15 of the circuit board 5.

Eighth Embodiment FIG. 22B is a cross-sectional view of the wrist-mounted portable wireless device 47 of this example around the wireless device main body.

In the wrist-mounted portable radio 47 of this embodiment, similarly to the wrist-mounted portable radio 40 according to the sixth embodiment, the conductor plate 4b is connected to the high-frequency amplifier circuit 14 at the contact 16a. This high-frequency amplifier circuit 14 is connected to the ground 15 of the circuit board 5. On the other hand, the conductor plate 4a
It is arranged near the noise signal generation source of the digital circuit 5a and the analog circuit 5b.

[0086] The conductor 4a is
In the divided state, both ends 4h and 4i are connected to a shield case 48a that covers a noise signal generation source of the digital circuit 5a and the analog circuit 5b.
For this reason, the conductor 4a has a lower impedance. The shield case 48a may be connected to either the positive electrode or the negative electrode of the battery 8 in terms of high frequency, but when connected to the positive electrode, the contact 16b and the ground 1
5 may be inserted with a low-impedance capacitor.

In the wrist-mounted portable radio device 47 configured as described above, even if a noise signal leaks from the shield case 48a, the low-impedance conductive plate 4a is arranged near the shield case 48a while being separated therefrom. Since the high impedance conductor plate 4b is arranged at the position
Noise signals are hard to penetrate the conductor plates 4a and 4b,
An effect similar to that of the sixth embodiment is obtained.

For example, among the conventional wrist-mounted portable radios, in the superheterodyne system shown in FIG. 6A, the frequency of a signal generated by reference oscillator 210, for example, 50 kHz and a frequency corresponding to n times the frequency ( n
Generates a noise signal in the vicinity of a natural number), and in the direct conversion method shown in FIG.
7 generate noise signals, and the levels of these noise signals are represented by solid lines 50 in FIG. The level of digital noise generated by other digital circuits is represented by a solid line 51, and each noise is at a high level. In particular, in the direct conversion method, since the tuning frequency of the antenna 13 matches the oscillation frequency of the local oscillator, the oscillation signal of the local oscillator easily jumps into the antenna 13. On the other hand, Embodiments 6 to 8
According to the wrist-mounted portable wireless device according to the above, since the conductive plate 4b having high impedance in high frequency is separated from the noise generation source, the noise hardly enters the antenna body 13,
Until represented by the solid line 52, the noise level can be reduced.

Ninth Embodiment FIG. 24 is a vertical cross-sectional view of the wrist-mounted portable wireless device 55 of the present example around the wireless device main body.

In the wrist-mounted portable wireless device 55 of this embodiment, the antenna 13 is connected to the local oscillation circuit 5 inside the wireless device main body 1a.
A local oscillation circuit 512 is formed on the lower surface side of the circuit board 5 so as not to receive the noise signal from the local oscillation circuit 51.
2 is covered by a ground pattern surface 500 formed on the upper or lower surface of the circuit board 5. The lower surface of the local oscillation circuit 512 is covered with a battery 8. Here, since the back cover 9 is a positive electrode, the battery 8 has a local oscillation circuit 512.
Is covered with the negative electrode (ground potential) of the battery 8. That is, since the local oscillation circuit 512 is surrounded by members having the same potential, the local oscillation circuit 512 does not emit a noise signal.

Embodiment 10 FIG. 25 is an explanatory diagram showing the configuration of the antenna of a wrist-mounted portable radio 60 of this embodiment.

The wrist-mounted portable radio device 4 according to the sixth embodiment is provided on the radio main body 1a of the wrist-mounted portable radio device 60 of this embodiment.
0, bands 2a, 2 for attaching it to the arm
b is attached. A buckle 67 as a means for connecting the bands 2a and 2b is attached to the end of the band 2a, and a hole 69 for inserting a positioning pin 68 is formed on the side of the band 2b. The hole 69 is formed at a position corresponding to the groove 13c of the antenna 13.

Inside the radio main unit 1a, a conductive plate 4 is provided.
a, 4b are arranged, and the antenna plates 11 (11a to 11d) are fixed to the bands 2a, 2b. The antenna plates 11a to 11d are electrically connected via the conductor plates 4a and 4b, respectively, to form the antenna body 13.

In this example, the length of the band 2b is
And the lengths of the antenna plates 11b and 11d fixed to them are set longer than the lengths of the antenna plates 11a and 11c.
That is, in the antenna body 13, the antenna plate 11
a, the length L1 of the side 67a of the 11c and the antenna plate 11
One end 1a '(so-called 6 o'clock side in a wristwatch) to which the band 2b of the wireless device main body 1a is connected is located near the position where the length L2 of the side 67b of the b and 11d is equal. Therefore, when the capacitor 18 is connected to the central position in the length direction of the antenna 13, the capacitor 18 is disposed inside the radio main unit 1 a on one end 1 a ′ side.

On the other hand, in the vicinity of the other end 1a ″ (so-called 12 o'clock side in a wristwatch) inside the radio device main body 1a to which the band 2a is connected, the ground 15 is connected to the conductor plate 4a side, The high-frequency amplifier circuit 14 is connected to the side of the plate 4b, which is a so-called feed point 66b, and the feed point 66b is connected to the capacitor 18
Is set off from the connection position. The high-frequency amplifier circuit 14 is connected to a subsequent circuit via a terminal 16, and the configuration and operation of the circuit are as described with reference to FIG. 5 in the description of the first embodiment. Is omitted.

Before explaining the reason why the feeding point 66b is set so as to be shifted from the connection position of the capacitor 18, the operation of the antenna 13 (slot antenna) will be described with reference to FIG.
This will be described with reference to FIG.

Since the antenna 13 is a magnetic current antenna, the voltage distribution is represented by a solid line V, and the current distribution is represented by a solid line I. Also, the antenna plate 1
The impedance Z at any given position is expressed by the following equation.

Z = V / I Therefore, near the connection position of the capacitor 18, the impedance is extremely high. On the other hand, the input impedance of the high-frequency amplifier circuit 14 is 50Ω to 100Ω. Therefore, when impedance matching between the antenna 13 and the high-frequency amplifier circuit 14 is to be performed, it is necessary to lower the impedance on the antenna 13 side. It is necessary to shift to a position where the impedance is low.

FIG. 27 shows the input impedance characteristics of the antenna 13 of this example, which are the impedance characteristics when the antenna 13 is viewed from the feeding point 66b. In this figure, the solid line L20 indicates
The input impedance characteristics when the feed point 66b is set near the connection position of the capacitor 18, and the solid line L21 indicates that the antenna plate 1
The input impedance characteristics when the feed point 66b is set at an intermediate position on the side 67a of the sides 1a and 11c, and the solid line L22 shows the input impedance characteristics when the feed point 66b is set near the end of the antenna plates 11a and 11c. is there. A circular area drawn by a solid line L19 indicates an optimum impedance range on the high-frequency amplifier circuit 14 side. Therefore, the feeding point 66b is shifted from the position on the antenna body 13 showing the impedance characteristic passing through the circular area drawn by the solid line L19, that is, from the connection position of the capacitor 18 to near the intermediate position on the side 67a of the antenna plates 11a and 11c. It is preferable to obtain the characteristic indicated by the solid line L21.

On the other hand, when the feeding point 66b is set at the position having the characteristic indicated by the solid line L20 or the position having the characteristic indicated by the solid line L22,
When impedance matching with the high-frequency amplifier circuit 14 is performed, it is necessary to add a matching circuit, which causes a problem such as an increase in the number of elements. On the other hand, when the feeding point 66b is appropriately shifted with respect to the connection position of the capacitor 18, impedance matching can be performed without adding an element or the like.

Therefore, in this example, regarding the configuration of a conventional wristwatch, focusing on the fact that the band length of band 2b (so-called 6 o'clock side in a wristwatch) is longer than band 2a (so-called 12 o'clock side in a wristwatch), In the main body 1a, the capacitor 18 is connected at a position near one end 1a ', and the feeding point 66b is shifted therefrom by a distance corresponding to the length of the radio main body 1a, and the other end 1a "is shifted. With such a configuration, the capacitor 18 can be connected to the central position in the longitudinal direction of the antenna 13 and the feed point 66b is set at a position deviated therefrom. Both conditions can be satisfied.

Embodiment 11 FIG. 28 (a) is an explanatory view showing the structure of the antenna of the wrist-mounted portable radio 70 of this embodiment, and FIG. 28 (b) shows the structure of holes formed in the band. FIG. FIG.
In (a), in the wrist-mounted portable wireless device 70 of this example, the length of the antenna plates 11b and 11d is
a, it is set longer than the length of 11c,
At the center position in the length direction of the antenna body 13 (the position where the length L1 and the length L2 are equal), the antenna plates 11b and 11d
The capacitor 62 is incorporated on the side of the band 2b to which is fixed.

As shown in FIG. 28B, a hole 69 having an inner diameter equal to the width of the groove 13c is formed in the band 2b in order to increase the bonding strength between the bands 2a and 2b. On the antenna plates 11b and 11d, an extended portion 71 having an enlarged width of the groove 13c is formed. For this reason, a narrow portion is formed in the antenna plates 11b and 11d, but the current distribution of the antenna plates 11b and 11d is
Since the antenna is concentrated on 1p, even if a narrow portion is formed in the antenna plates 11b and 11d, the sensitivity of the antenna body 13 is as follows.
Does not drop.

In this example, when the capacitor 62 is incorporated inside the band 2b, the antenna plates 11b and 11d
I use myself. That is, as shown in an enlarged view of the structure of the capacitor 62 in FIGS. 29 and 30, a step 7 is provided on the side of the antenna plate 11b toward the antenna plate 11d.
1a, a flat plate portion 71b extending on the upper surface side is provided. On the antenna plate 11d side, a flat plate portion 72 extending on the lower surface side via the step 72a toward the antenna plate 11b.
b are provided, and a dielectric material 73
Is filled. Therefore, the opposed area of the flat plate portions 71b and 72b is S, and the dielectric constant of the dielectric substance 73 in vacuum is ε.
0, the relative permittivity of the dielectric substance 73 is εr, the flat plate portion 71b,
Assuming that the facing distance of 72b is d, the capacitor 62 in which the capacitance C is represented by the following equation is formed.

C = ε0 · εr · S / d Therefore, the capacitor 62 does not need to be arranged inside the radio unit 1a, and can be configured outside the radio unit 1a. Regardless of whether or not the wireless device main body 1a is near the center, the sensitivity can be increased by configuring the capacitor 62 at the center position in the longitudinal direction of the antenna body 13. Further, since the wireless device main body 1a does not need to be located near the center in the length direction of the antenna body 13,
By disposing them at shifted positions, the feeding point 66b can be set at a position separated by an optimum distance from the capacitor 62 for matching the impedance.

As the dielectric substance 73, leather, silicon-based resin, urethane-based resin, or the like can be used. In this case, since the materials of the bands 2a and 2b can be used as they are, the bands 2a and 2b can be used. At the time of molding 2b, the capacitor 62 can be formed at the same time. Here, band 2
The relative permittivity εr of the materials a and 2b is set to 3 to 5,
The opposing area S of 1b and 72b is 25 square mm, and the flat plate portion 71
If the facing distance d between b and 72b is 0.3 mm, 2 to 4
A capacitance C of pF is obtained. With this capacitance value, the capacitor 62 that satisfies the conditions for use in the wrist-mounted portable wireless device 70 used in the UHF frequency band can be configured.

Embodiment 12 FIG. 31 is a perspective view showing the structure of an antenna disposed inside a band of a wrist-mounted portable radio device of this embodiment.

In this example, the antenna 6 of the wrist-mounted portable radio device 70 according to the eleventh embodiment has the capacitor 6
A hole 77 (opening) is formed in the vicinity of the flat plate portions 71b and 72b formed to constitute the second component. These holes 7
7 is formed at a high density near the flat plate portions 71b and 72b, and is formed at a low density from there toward the end portions 11p and 11q, and is not formed at the end portions 11p and 11q.

In the wrist-mounted portable wireless device, the flat plate portion 71
The vicinity of b and 72b is high impedance, and is strongly affected by the human body when the wrist-mounted portable radio is mounted on the wrist. Therefore, the side of the antenna 13 and the side of the high-frequency amplifier circuit connected to it. The impedance matching with
This causes a drop in sensitivity. However, in this example, since the hole 77 is formed in the high impedance portion, the area opposed to the arm is substantially small in that portion, so that it is hardly affected by the human body. Even in this case, the flat plate portions 71b, 7
In the vicinity of 2b, where the current distribution is small, the hole 7
The formation of 7 does not increase the resistance loss. On the other hand, the reason why the holes 77 are not formed in the end portions 11p and 11q of the antenna body 13 is to prevent an increase in loss resistance because the current distribution is large in this portion.

The flat plate portions 71b, 7b of the antenna body 13
Even when the capacitor 62 using 2b is not formed,
As shown in FIG. 32, a high-density hole 77 is formed near the central position in the longitudinal direction, and the end portions 11p and 11q are formed therefrom.
, A low-density hole 77 may be formed to prevent the influence of the human body.

Embodiment 13 FIG. 33 is a plan view of an antenna body disposed inside a band of a wrist-mounted portable wireless device of this embodiment, and FIG. 34 is a cross-sectional view thereof.

The wrist-mounted portable wireless device of this embodiment is similar to that of the first embodiment.
An arm-mounted portable radio having all of the structural features of the arm-mounted portable radio according to any one of (1) to (12),
In order to improve the electrical characteristics of the antenna body 13, the combination of the manufacturing conditions and the structure of the antenna plate 11 is optimized.

The antenna plate 11 is made of a material that is rigid and hardly rusts, such as stainless steel, and is manufactured through a rolling process of stretching the material while compressing it. For this reason, the antenna plate 11
There are fine irregularities on the surface of. In order to illustrate the direction of the unevenness, the peak portion of the unevenness is represented by a dotted line 80a in FIG. Here, when a high-frequency signal flows through the antenna plate 11, the current flows on the surface of the antenna plate 11 due to the skin effect. Therefore, the thickness (Skin) at which current permeates the antenna plate 11
depth) δ is expressed by the following equation using the magnetic permeability μ0 of the material in vacuum, the frequency f of the high-frequency signal, and the conductivity σ of the material. Therefore, the difference between the direction of the unevenness and the direction of the current is This causes an increase in loss resistance.

Δ = 1 / √ (π · f · μ0 · σ) Therefore, in this example, as shown in FIG.
1, the direction of the unevenness formed by the rolling process (dotted line 80a) and the direction of the current flowing therethrough (arrow 80b) are matched at the end portion 11p having a large current distribution to reduce the resistance loss. It is.

Further, in this example, as shown in FIG.
On both sides on which the current flows due to the skin effect, the direction of the unevenness (dotted line 80a) and the direction of the current (indicated by arrow 80b).
Are provided, an upper layer 83 and a lower layer 84 having the same directions as those of FIG.
0b. ) Are orthogonal to each other. Therefore,
In this example, the antenna plate 11 is provided with an upper layer 83, an intermediate layer 85, and a lower layer 84 having different rolling directions, and the bending strength of the antenna plate 11 is also increased. Even when a large force is repeatedly applied to the antenna plate 11 each time the antenna plate 11 is mounted, the antenna plate 11 is not broken.

Embodiment 14 In order to reduce the resistance loss while maintaining the strength of the antenna 13 high, as shown in FIG. For the portion 11r to which a large force is repeatedly applied when mounting, a plate material 86 in which the direction of the unevenness (dotted line 80a) formed in the rolling step is aligned with the longitudinal direction, and the end portion 11 having a large current distribution is used.
For p, a plate material 87 in which the direction of the unevenness (dotted line 80a) and the direction of the current (indicated by an arrow 80b) may be used.

Embodiment 15 In order to reduce the resistance loss while maintaining the strength of the antenna plate 11 high, as shown in FIG.
Of these, a plate material 88 in consideration of the strength surface is used for a portion 11r to which a large force is repeatedly applied when the wrist-mounted portable wireless device is mounted on the wrist, while the terminal portion 1 having a large current distribution.
For 1p, a plating layer 89 of copper or silver having high conductivity may be formed on both surfaces of the plate material 88. In this case, the thickness of the plating layer 89 is set to the thickness δ at which the current penetrates the antenna plate 11.
Set to a thickness that exceeds

Embodiment 16 FIG. 37 is an explanatory diagram showing the structure inside the band of the wrist-mounted portable wireless device of this embodiment, and FIG. 38 is a sectional view thereof.

In the wrist-mounted portable wireless device of this embodiment, the widthwise direction extends from the end 2s on the side connected to the wireless device body 1a to the vicinity of the center 2t where the hole 69 is formed, inside the band 2b. A plurality of protrusions 91a are formed, and the height of these protrusions 91a gradually decreases from the end 2s to the end 2u. Other configurations are described in the first to first embodiments.
5 is provided with the features of the wrist-mounted portable wireless device.

The portions of the antenna plates 11b and 11d fixed to the end 2s of the band 2b tend to be easily affected by the arm 90 because of the high impedance, but in this example, the portions near the end 2s are provided. The high protrusion 91 a is provided to secure a large gap between the antennas 11 b and 11 d and the arm 90. On the other hand, the end 2u of the band 2b has a low impedance and is not easily affected by the arm 90, and therefore has a low protrusion 91a to facilitate the coupling between the bands. In the length direction of the band 2b, the side of the end 2s connected to the radio main unit 1a is
Since it corresponds to a portion having a large curvature when attached to zero, it is easy to bend by increasing the height of the projection 91a.

Therefore, according to the wrist-mounted portable wireless device of this embodiment, a portion of the antenna plates 11b and 11d which has a high impedance and is easily affected by the arm 90 or the like is placed on the arm 9
Since it is separated from 0, the antenna impedance does not shift even when it is worn on the arm 90, so that high sensitivity can be maintained.

Embodiment 17 In the twelfth embodiment, a protrusion 91a extending in the width direction is formed as a protrusion formed inside the band 2b. Instead, as shown in FIG. 39 and FIG. The protrusions 92a may be formed. Also in this case, the end 2s of the band 2b on the side connected to the wireless device main body 1a.
Since the antenna plates 11b and 11d fixed to the antenna plate have high impedance and tend to be easily affected by the arm 90, a high protrusion 92a is provided on the side of the end 2s, and the antenna plates 11b and 11d and the arm 90 are fixed. There is a large gap between them. Therefore, in the wrist-mounted portable wireless device of this example, the high impedance portion of the antenna plate 11 is not affected by the arm 90 and the like, so that the antenna impedance does not shift and the high sensitivity is maintained. Can be. In the length direction of the band 2b, the side connected to the wireless device main body 1a is easily bent because the high protrusion 92a is formed.

Eighteenth Embodiment FIG. 41 is an exploded cross-sectional view showing the main body side of a wrist-mounted portable radio device 95 of this embodiment, and FIG. 42 is a longitudinal cross-sectional view thereof.

In the wrist-mounted portable wireless device 95 of this example, two bands (not shown) are attached to both sides of the wireless device main body 1a. A data display device 3 for displaying various information and a panel frame 3a thereof are formed on the front side of the wireless device main body 1a.
Conductor plates 4a and 4b are arranged. An antenna plate 11 (11a to 11d) is fixed to the band, and a fixing plate 96a of the antenna plate 11 has a contact pin 96b formed at an end of each of the conductor plates 4a and 4b. The antenna body 13 as a slot antenna is electrically connected to the antenna body 96c. The antenna plate 11 and the conductor plates 4a and 4b are screwed using a screw hole 96d formed in the fixing plate 96a of the antenna plate 11.

As shown in FIG. 42, a data display device 3, a circuit board 5 on which each circuit group is mounted, a battery frame 97, a battery 8, and a back cover (shown in FIG. Is attached.) Among them, the conductor plates 4a and 4b are located on the side of the data display device 3, and the circuit board 5 is located on the lower surface side of the conductor plates 4a and 4b.

On the lower surface side of the conductor plates 4a and 4b, BaO
-TiO _2, TiO _4, BaO ₃ and high dielectric material layer 98 such as low-loss dielectric ceramic layers are stacked.
Further, on the upper surface and the lower surface of the antenna plate 11a~11d _{is, BaO-TiO 2, TiO 4} , BaO 3 and high dielectric material layer 99 such as low-loss dielectric ceramics are laminated, the high dielectric material The layer 99 is in a state of being filled inside the groove 13c of the antenna plate 11. In addition, BaO
Ceramics such as TiO ₂ , TiO ₄ , and BaO ₃ have a relative dielectric constant of 8 to 40, and a polyester-based resin (relative dielectric constant of 3.2 to 4.8) or a silicon-based resin (specific dielectric constant) forming a band. The dielectric constant is higher than that of 3).

In the wrist-mounted portable wireless device 95 configured as described above, the circuit board 5 is located on the lower surface side of the conductor plates 4a and 4b. The effect is that the radio wave is radiated without being interrupted by the circuit board 5. Further, in this example, the conductor plate 4
a, 4b and a high dielectric material layer 98 on the antenna plate 11;
99, and these high dielectric material layers 98, 9
The wavelength λ ′ of the electromagnetic wave propagating through 9 is obtained by using the wavelength λ in the air and the relative permittivity ε of the dielectric material, as expressed by the following equation, as shown in the following equation. Larger, shorter.

Λ ′ = λ / √ε Accordingly, as the permittivity of the high dielectric material layers 98 and 99 is larger, the same effect as in the case where the peripheral length of the groove 13c of the antenna 13 is extended. Therefore, the antenna gain with respect to long-wavelength electromagnetic waves can be improved without extending the peripheral length of the groove 13c, that is, without increasing the length of the antenna body 13.

Other Embodiments It is to be noted that the high dielectric material layer 9 is
The configuration in which 8, 99 are provided can be added to the wrist-mounted portable wireless device according to the first embodiment, and can also be added to the wrist-mounted portable wireless device according to another embodiment.

Also, the features of the wrist-mounted portable wireless devices according to the above-described embodiments 1 to 18 may be combined. For example, if the features of the embodiments 1, 6, 10, 13, and 16 are combined, Since there is no circuit board on the surface side of the antenna body, radio waves radiated from the antenna are not blocked. The high impedance side of the antenna body is
Since it is on the low impedance side of the antenna body that it is away from the noise signal generation source included in the circuit group and near the noise signal generation source, the noise signal does not enter the antenna body. Further, since the antennas are connected with different lengths on both sides of the apparatus main body, a feeding point can be set at an optimum position. Further, in the high impedance portion of the antenna body, since the thickness of the back surface side of the wristband is thick, the influence of the antenna body on the human body can be reduced in the wearing state. In addition, the resistance loss of the antenna body can be reduced.
Therefore, in the wrist-mounted portable wireless device, the problems that have hindered the improvement in sensitivity can be collectively solved, and high sensitivity can be obtained.

[0131]

As described above, the present invention is characterized in that the antenna body is arranged at a position above the circuit board in the apparatus main body. Thus, according to the present invention,
Since there is no circuit board or the like on the front surface side of the antenna body, there is nothing to block radio waves radiated from the antenna, so that sensitivity is improved.

Even when the antenna body is fixed to the outer frame member of the apparatus main body so that the groove formed in the length direction is directed to the outer periphery, the surface of the antenna body may be configured to block the radiated radio wave. Because there is no, the sensitivity is improved.

In the antenna body, one side of a portion facing the device body via the groove is located at a position farther from the noise signal generation source than the other side connected to the signal potential side of the high frequency amplifier circuit. When connected to the reference potential side of the high-frequency amplifier circuit, noise signals do not enter the antenna, so that the sensitivity is improved. In particular, in a direct conversion wireless device, since the tuning frequency of the antenna and the oscillation frequency of the local oscillator match, the noise of the local oscillator tends to enter the antenna, but even in this case, the impedance becomes high at high frequencies. By providing the local oscillator at a position away from the antenna portion, it is possible to suppress the influence of noise on own and other wireless devices.

In the case where the antennas are fixed to the wrist bands with different lengths on both sides of the apparatus main body, respectively, the optimum position within the apparatus main body and shifted from the connection position of the reactance element. The power supply point can be set at the point, and the sensitivity is improved.

When an opening is formed at a high density near the connection position of the reactance element with respect to the antenna, or
If the thickness of the back side of the wristband is increased near the connection position of the reactance element to the antenna body, the influence of the human body on the high impedance portion of the antenna body can be reduced, so that impedance matching can be maintained. The sensitivity is improved.

When a resistance loss reducing structure for lowering the electrical resistance to a high-frequency current is provided at the end of the antenna body, the sensitivity can be improved since the resistance loss of the antenna body can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an appearance of a wrist-mounted portable wireless device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the vicinity of a wireless device main body of the wrist-mounted portable wireless device shown in FIG.

FIG. 3 is a vertical cross-sectional view of a part around the wireless device main body of the wrist-mounted portable wireless device shown in FIG. 1;

4A is an explanatory diagram showing general directivity when a slot antenna is used, and FIG. 4B is an explanatory diagram showing directivity of an antenna of the wrist-mounted portable wireless device shown in FIG. 1; FIG.

FIG. 5 is a block diagram showing a circuit configuration for operating the wrist-mounted portable wireless device shown in FIG. 1;

FIG. 6A is a block diagram showing a configuration of a single superheterodyne radio circuit, and FIG. 6B is a block diagram showing a configuration of a direct conversion radio circuit.

FIG. 7 is an explanatory diagram showing directivity of a general wrist-mounted portable wireless device when a slot antenna is used.

FIG. 8 is an explanatory diagram showing the directivity of the antenna of the wrist-mounted portable wireless device shown in FIG. 1;

FIG. 9 is a vertical cross-sectional view of the periphery of a wireless device main body of the wrist-mounted portable wireless device according to the second embodiment of the present invention.

FIG. 10 is a cross-sectional view of the vicinity of the wireless device main body of the wrist-mounted portable wireless device shown in FIG. 9;

FIG. 11A is a cross-sectional view of a wrist-mounted portable wireless device according to a modification of the second embodiment of the present invention, around a wireless device main body;
(B) is a cross-sectional view around a wireless device main body of a wrist-mounted portable wireless device according to another modification.

FIG. 12 is a plan view around a wireless device main body of an arm-mounted portable wireless device according to a third embodiment of the present invention.

FIG. 13 is a plan view around a wireless device main body of an arm-mounted portable wireless device according to a fourth embodiment of the present invention.

FIG. 14A is a plan view around a wireless device main body of an arm-mounted portable wireless device according to a fifth embodiment of the present invention, and FIG. 14B is a side view thereof.

FIG. 15 is a perspective view illustrating an appearance of a wrist-mounted portable wireless device according to a sixth embodiment of the present invention.

16 is an XY diagram of the wrist-mounted portable wireless device shown in FIG.
It is sectional drawing in a line.

17 is a ZU of the wrist-mounted portable wireless device shown in FIG.
It is sectional drawing in a line.

18 is a plan view showing a configuration of an upper surface side of a circuit board of the arm-mounted portable wireless device shown in FIG.

19 is a plan view showing a configuration of a lower surface side of a circuit board of the wrist-mounted portable wireless device shown in FIG.

20 is a longitudinal sectional view schematically showing a feature point of a transverse section of the wrist-mounted portable wireless device shown in FIG.

FIG. 21 is a longitudinal sectional view schematically showing the characteristic points of the longitudinal section of the wrist-mounted portable wireless device shown in FIG.

FIG. 22A is a cross-sectional view of the periphery of a wireless device main body of an arm-mounted portable wireless device according to a seventh embodiment of the present invention, and FIG.
FIG. 14 is a cross-sectional view of the periphery of a wireless device main body of an arm-mounted portable wireless device according to an eighth embodiment of the present invention.

FIG. 23 is a graph showing a noise level reduction effect of the wrist-mounted portable wireless device according to Examples 6 to 8 of the present invention.

FIG. 24 is a vertical cross-sectional view around a wireless device main body of a wrist-mounted portable wireless device according to a ninth embodiment of the present invention.

FIG. 25 is an explanatory diagram of an antenna body of the wrist-mounted portable wireless device according to the tenth embodiment of the present invention.

26 is an explanatory diagram showing current and voltage distributions in the antenna body shown in FIG.

FIG. 27 is a graph showing the relationship between the position of a feeding point and impedance characteristics in the wrist-mounted portable wireless device shown in FIG. 25.

FIG. 28A is an explanatory view showing a configuration of an antenna body of a wrist-mounted portable wireless device according to Embodiment 11 of the present invention;
(B) is an explanatory view showing a structure of a hole formed in the band.

FIG. 29 is an explanatory diagram illustrating a structure of a capacitor configured in the antenna body illustrated in FIG. 28;

30 is an explanatory diagram illustrating a structure of a capacitor configured in the antenna body illustrated in FIG. 28.

FIG. 31 is a perspective view showing a structure of an antenna body of a wrist-mounted portable wireless device according to Embodiment 12 of the present invention.

FIG. 32 is a perspective view showing a structure of an antenna of a wrist-mounted portable wireless device according to a modification of the twelfth embodiment of the present invention.

FIG. 33 is a plan view of an antenna disposed inside a band of a wrist-mounted portable wireless device according to Embodiment 13 of the present invention.

34 is a sectional view of the antenna body shown in FIG.

FIG. 35 is a plan view of an antenna body disposed inside a band of a wrist-mounted portable wireless device according to Embodiment 14 of the present invention.

FIG. 36 is a cross-sectional view of the distal end portion of the antenna unit arranged inside the band of the wrist-mounted portable wireless device according to Embodiment 15 of the present invention.

FIG. 37 is an explanatory diagram showing the structure inside the band of the wrist-mounted portable wireless device according to Embodiment 16 of the present invention.

FIG. 38 is a sectional view of the band shown in FIG. 37;

FIG. 39 is an explanatory diagram showing the structure inside the band of the wrist-mounted portable wireless device according to Embodiment 17 of the present invention.

FIG. 40 is a sectional view of the band shown in FIG. 39;

FIG. 41 is an exploded cross-sectional view showing a radio device main body side of an arm-mounted portable radio device according to Embodiment 18 of the present invention.

42 is an exploded longitudinal sectional view of the wrist-mounted portable wireless device shown in FIG. 41 on the side of the wireless device main body.

[Explanation of symbols]

1, 35, 38, 40, 45, 47, 55, 60, 7
0, 95: arm-mounted portable wireless device (arm-mounted antenna device) 1a: wireless device main body (device main body) 1b, 30a, 35a, 38a: outer frame 2a, 2b: band (Wrist wearing band) 3 ... Data display device (display unit) 4a, 4b, 4c-4f ... Conductor plate 4g-4i ... Conductor plate end 5 ... Circuit board 5a ... Digital circuit 5b Analog circuit 6 Reflector 8 Battery (power element) 10 Ground plate 11, 11a, 11b, 11c, 11d Antenna plate 13, 39 Antenna Body 14 high-frequency amplifier circuit 18, 62 capacitor (reactance element) 29a, 29b conductive pattern 48, 48a shield case 66b feeding point 71 expansion part 71b, 72b ... Plate 73 ... Dielectric substance 77 ... Hole (opening) 89 ... Plating layer 91a, 92a ... Protrusion 90 ... Arm 98, 99 ... High dielectric constant material layer 501 ... DC- DC converter (noise source) 512 ... local oscillation circuit (noise source)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification symbol FI H04B 1/08 H04B 1/08 N // H04B 7/26 7/26 U (58) Fields surveyed (Int. Cl. ⁷ , (DB name) H04B 1/38 H01Q 1/22 H01Q 1/38 H01Q 1/44 H04B 1/034 H04B 1/08 H04B 7/26

Claims (26)

(57) [Claims] An apparatus main body having a circuit board on which an arm mounting band is connected and a circuit group is formed, and a groove formed in a length direction fixed to the apparatus main body and the arm mounting band. An arm body, wherein the antenna body is disposed above the circuit board within the apparatus body. 2. The wrist-mounted antenna device according to claim 1, wherein a reflection member for increasing an antenna gain by an image effect is provided at a position below the antenna body in the device main body. 3. The apparatus according to claim 1, wherein:
An arm-mounted antenna device, comprising: a display portion capable of displaying information on a surface side thereof, wherein the antenna body is located on both sides of the display portion in the device main body. 4. The apparatus according to claim 1, wherein:
A wrist-mounted antenna device having a display portion capable of displaying information on the surface side thereof, wherein the antenna body is formed on the display portion as a transparent conductive thin film layer in the device main body. . 5. An apparatus main body having a circuit board on which an arm mounting band is connected and having a circuit group formed therein, and a groove fixed in a side surface of an outer frame member of the apparatus main body and formed in a longitudinal direction. And a groove of the antenna body facing the outer peripheral side of the outer frame member. 6. An apparatus main body which has a circuit board on which an arm mounting band is connected and in which a circuit group is formed and which is fixed to the apparatus main body and the arm mounting band and has a groove formed in a longitudinal direction. One side of a portion of the antenna body opposed to the antenna body via the groove in the device main body is connected to a reference potential side of a high-frequency amplifier circuit included in the circuit group. An arm-mounted antenna device, wherein the antenna device is connected to a signal potential side of the high-frequency amplifier circuit at a position distant from a noise signal generation source included in the circuit group. 7. The arm-mounted antenna device according to claim 6, wherein the other side is connected to the reference potential side via a reactance element. 8. The wrist-mounted antenna device according to claim 6, wherein the other side is electrically connected to a power supply element for driving the circuit group. 9. The arm-mounted antenna device according to claim 6, wherein the other side is electrically connected to a shield covering the noise signal generation source. 10. The circuit according to claim 6, wherein the one side is arranged at a position above the circuit board, and a local oscillation circuit included in the circuit group is formed on a lower surface side of the circuit board. Arm-mounted antenna device. 11. The wrist-mounted antenna device according to claim 10, wherein the local oscillation circuit is surrounded by members having the same potential. 12. An apparatus main body having a circuit board in which an arm mounting band is connected to both sides and on which a circuit group is formed, and
An antenna body fixed to the device body and the wrist band and having a groove formed in a length direction, and a reactance element connected across the groove at a central position in the length direction of the antenna body. The antenna body has an antenna plate fixed to the wrist band with different lengths on both sides of the device main body,
A wrist-mounted antenna device, wherein a feeding point for the antenna body set at a position separated by a predetermined distance from a connection position of the reactance element is located in the device main body. 13. The antenna plate according to claim 12, wherein a shorter one of the antenna plates is arranged on the side of the wristband to which a buckle for connecting the wristbands is attached. The long antenna plate is disposed on a side of the wrist band on which a stop hole for hooking the pin of the buckle is formed. 14. The method according to claim 13, wherein:
An arm-mounted antenna device formed at a position corresponding to a central portion of the groove in the width direction. 15. The arm according to claim 13, wherein the groove has an extended portion having a groove width corresponding to the inner diameter of the stop hole at a portion corresponding to a position where the stop hole is formed. Wearable antenna device. 16. The arm-mounted antenna device according to claim 12, wherein the reactance element is built in a side of a wrist band to which a longer antenna plate is fixed. 17. The antenna device according to claim 16, wherein, in the longer antenna plate, portions facing each other via the groove protrude inward near a center in a longitudinal direction of the antenna body. An arm-mounted antenna device, wherein an overlapping portion of an antenna plate is formed, and a capacitive element as the reactance element is formed in the overlapping portion. 18. An apparatus main body having a circuit board on which an arm mounting band is connected and having a circuit group formed therein, and a groove formed in a length direction fixed to the apparatus main body and the arm mounting band. A reactance element is connected to the antenna body over the groove at a central position in a longitudinal direction of the antenna body, and the reactance element is connected to the antenna body from a terminal side thereof. An arm-mounted antenna device, wherein an opening is formed such that the degree of formation increases toward the position. 19. An apparatus main body having a circuit board on which an arm mounting band is connected and having a circuit group formed therein, and a groove formed in a length direction fixed to the apparatus main body and the arm mounting band. A reactance element is connected to the antenna body so as to straddle the groove at a center position in a longitudinal direction of the antenna body, and the wrist mounting band is connected to the reactance element from the distal end side. An arm-mounted antenna device, wherein a thickness of a rear surface side is increased toward a connection position point to the antenna body. 20. The arm according to claim 19, wherein a protrusion is formed on the back side of the wrist band, the protrusion rising from the end side toward the vicinity of a position where the reactance element is connected to the antenna body. An arm-mounted antenna device, wherein a thickness of a back surface side of the wearing band is increased at a position where the reactance element is connected to the antenna body. 21. An apparatus main body having a circuit board on which an arm mounting band is connected and having a circuit group formed therein, and a groove formed in a length direction fixed to the apparatus main body and the arm mounting band. An antenna body having a resistance loss reducing structure for reducing an electrical resistance to a high-frequency current at a terminal portion thereof to reduce a resistance loss. 22. The antenna loss reducing structure according to claim 21, wherein a rolling direction in the rolling and a current direction are made to coincide with each other on a surface of an end portion of the antenna body formed by rolling a metal plate. An arm-mounted antenna device characterized by having a bent structure. 23. The arm-mounted antenna device according to claim 21, wherein the antenna loss reducing structure is a structure in which a metal layer having good electric conductivity is coated on a terminal surface of the antenna body. 24. An apparatus main body having a circuit board in which an arm mounting band is connected to both sides and on which a circuit group is formed;
On both sides of the device main body, there are antenna bodies each having a different length and fixed to the wrist band, and formed with a groove in the length direction. The antenna body includes the circuit inside the device main body. At a position above the substrate, one of the portions facing each other via the groove is configured to generate noise included in the circuit group as compared with the other side connected to the reference potential side of the high-frequency amplifier circuit included in the circuit group. An arm-mounted antenna device, which is connected to a signal potential side of the high-frequency amplifier circuit at a position distant from a source. 25. The arm-mounted antenna device according to claim 1, wherein a high dielectric constant material layer is laminated on at least one surface of the antenna body. 26. A radio equipped with an arm-mounted antenna device using the arm-mounted antenna device defined in any one of claims 1 to 25.