JPH06338819A - Arm-installed antenna device and radio equipment provided with the same - Google Patents

Abstract

PURPOSE:To provide an arm-installed antenna device using a slot antenna as an antenna body and capable of improving sensitivity by improving the structure of it and radio equipment provided with such antenna device. CONSTITUTION:Two bands 2a, 2b are mounted on both sides of a radio equipment main body 1a in arm-loding type portable radio equipment, and the antenna body 13(slot antenna) is comprised of antenna plates 11 fixed on the bands 2a, 2b. A data display device 3 and conductor plates 4a, 4b to constitute a part of the antenna body are arranged at the surface side of the radio equipment main body 1a, and the conductor plates 4a, 4b are located at the upper position of a circuit board 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrist-worn antenna device mounted on a wrist-worn radio device or the like, and more particularly to its internal structure.

[0002]

2. Description of the Related Art Conventionally, a loop antenna is generally used as an antenna for a small portable wireless device, and such an electric operation principle and structure are described in, for example, the 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. Besides, when the frequency is relatively high, an inverted F antenna may be used.

On the other hand, as a small-sized portable wireless device, a wrist-mounted portable wireless device which can be mounted on an arm or the like is being developed, and as a typical example thereof, Japanese Patent Laid-Open No. 63-1589.
No. 24 describes using a loop antenna,
Japanese Patent Application Laid-Open No. 4-212522 describes a device 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 a wrist-worn portable radio or the like, the sensitivity and directional characteristics deteriorate when it is worn on a human body. However, it has not yet reached full performance.

Here, the present inventor proposes to use a slot antenna for a wrist-worn portable radio device. When mounting this slot antenna on a wrist-worn portable radio, etc., a conductor plate that functions as a part of the antenna is provided inside the body of the radio, while a conductor plate is also placed on the arm-wear band side. The slot antenna is formed by providing these conductive plates and connecting them. In a wrist-worn portable wireless device using a slot antenna having such a structure, regardless of the band length of the wearer, the inductance value of the antenna is defined by the circumferential length of the groove and the conductor plate width, and it is used. There is an advantage that a high antenna gain can be maintained even if a person has different arm thicknesses. Further, when the wrist-worn portable wireless device is worn on the arm, the groove is open toward the outer periphery, and therefore, the magnetic field component generated on the human body surface or the arm surface can be efficiently detected. There is also.

However, for a wrist-worn portable radio device, etc., there is a demand for higher sensitivity, and the sensitivity cannot be sufficiently improved by simply using the slot antenna. There is a point.

The first reason is that the feeding point, which is the connection point to the radio transmitter / receiver of the wrist-worn radio using the slot antenna, is inevitably located near the central portion in the length direction of the slot antenna. This feed point is due to the fact that it is located inside the radio main body in which various circuit components are arranged. That is, the vicinity of the central portion of the slot antenna corresponding to the feeding point is a portion where the radiant energy of the radio wave is the maximum, but around it, an insulating material is provided in a narrow radio body.
Various parts made of lossy material, conductive material, etc. are placed. Among them, if parts made of lossy material or conductive material are placed in the radiation direction of the radio wave, radiated energy is shielded or attenuated. Because.

The second reason is that a circuit for processing digital signals and a voltage booster circuit (DC
/ DC converter) and other circuit components that generate noise signals that affect the transmission / reception sensitivity must be arranged around the central portion of the slot antenna. Therefore, the noise signal becomes conduction noise that propagates along the power supply pattern or the like or radiation noise that is radiated into space, and reduces the sensitivity characteristic. Among them, the radiated noise may interfere not only with its own wireless device but also with other wireless devices depending on the circuit system.

The third reason is that with respect to the slot antenna, a reactance element is connected to a central position in the length direction of the slot antenna to resonate at a specific frequency.
This is due to the high impedance of the portion located inside the radio body. That is, since the Q of the antenna circuit increases, the antenna impedance when worn on the arm shifts due to the influence of the human body, and the optimum matching state between the wireless transmission / reception unit and the antenna side shifts, resulting in a decrease in transmission / reception sensitivity. Is. Here, although an element may be added to the circuit side for the purpose of lowering Q, the addition of such a component is not preferable for the wrist-worn portable wireless device because it hinders downsizing.

The fourth reason is that in the wrist-worn portable radio device, a part of the antenna is fixed to the wrist-worn band.
This is because there is a case where the increase in electrical resistance loss cannot be tolerated due to the constraint that the strength must be increased.

In view of the above problems, the object of the present invention is to
A slot antenna is used as the antenna body,
An object of the present invention is to improve the structure and to realize a wrist-worn antenna device capable of further improving sensitivity and a wireless device equipped with this antenna device.

[0012]

In order to solve the above-mentioned problems, in the present invention, in order to solve all the above-mentioned reasons, the structure of an arm-mounted antenna device and a radio device including the same is as follows. Like First, the arm mounting band is connected to both sides, and the antenna body having the groove formed in the length direction is provided on the both sides of the device main body having the circuit board in which the circuit group is configured inside, with the arm mounting band having different lengths. Fixed to each. In addition, the antenna body is provided with a resistance loss reduction structure that lowers 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 upper part of the circuit board, one side of the portions facing each other through the groove is connected to the reference potential side of the high frequency amplification circuit included in the circuit group in the device main body. In comparison with the above, the circuit is connected to the signal potential side of the high frequency amplifier circuit at a position distant from the noise source included in the circuit group. Also, regarding the arm wearing band,
The thickness of the back side is increased near the position where the reactance element is connected to the antenna body.

With this structure, since there is no circuit board on the front surface side of the antenna body, radio waves radiated from the antenna are not blocked. Also, of the antenna body,
The side connected to the signal potential side of the high-frequency amplifier circuit (high impedance side) is separated from the noise signal generation source included in the circuit group, and the vicinity of the noise signal generation source is the low impedance side of the antenna body. , No noise signal enters the antenna body. Furthermore, since the antenna bodies are connected with different lengths on both sides of the device body, the feeding point is set at an optimum position, that is, a low impedance position, which is deviated from the connection position of the reactance element with respect to the central position of the antenna body. Even in this case, the feeding point is inside the device body, and the optimum impedance connection can be realized. Further, in the vicinity of the position where the reactance element is connected to the antenna body (high impedance portion), the thickness of the back side of the wristband is large, and the antenna body is
Since it is arranged above the circuit board and at the maximum distance from the arm, it is possible to mitigate the influence of the antenna body on the human body in the mounted state. Moreover, the resistance loss of the antenna body is reduced. In this way, each of the reasons that hinder the improvement in sensitivity as described above can be eliminated, so that the sensitivity is improved.

In the present invention, when an object that blocks radio waves radiated from the antenna body is arranged on the lower side to enhance the sensitivity, the arm mounting band is connected and the circuit board on which the circuit group is formed is internally provided. A device body and an antenna body fixed to the device body and the arm mounting band and having a groove formed in the longitudinal direction, the antenna body being disposed in a position above the circuit board in the device body. Make the configuration.

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

In the present invention, the antenna body having a groove formed in the lengthwise direction is fixed to the side surface of the outer frame member of the main body of the apparatus, as a structure in which nothing blocking the radio waves is arranged on the front surface side of the antenna body. However, the groove may face the outer circumference of the outer frame member.

In the present invention, in order to eliminate the influence of a noise signal and increase the sensitivity, one side of the antenna body facing the other side through the groove in the apparatus body is subjected to high frequency amplification included in the circuit group. The circuit is connected to the signal potential side of the high frequency amplifier circuit at a position distant from the noise signal generation source included in the circuit group as compared with the other side connected to the reference potential side of the circuit.

Here, the other side may be connected to the reference potential side via a reactance element. Further, the other side may be electrically connected to a power supply element for driving the circuit group or a shield body covering a noise signal generation source for the purpose of lowering the impedance of the other side. Further, it is preferable that the antenna body is disposed above the circuit board and the 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 have a structure surrounded by a member.

In the present invention, when the feeding point is set at the optimum position apart from the connecting position of the reactance element, the device is used as an antenna plate forming a part of the antenna body so that the feeding point is located in the device body. The antenna plates are connected to both sides of the body with different lengths.

Here, of the antenna plates, the shorter antenna plate is arranged on the side of the arm mounting band on which the buckle for connecting the arm mounting bands is attached, and the longer antenna plate is arranged. It is preferable to arrange it on the arm mounting band on the side where the stop hole for hanging the pin of the buckle is formed. In this case, the stop hole is formed at a position corresponding to the central portion in the width direction of the groove. Further, in the groove, an expanded portion having a groove width corresponding to the inner diameter of the stop hole may be formed in a portion corresponding to the position where the stop hole is formed. Furthermore, it is preferable to incorporate the reactance element on the side of the wristwear band to which the longer antenna plate is fixed. In this case, in the longer antenna body, the overlapping portions of the antenna plates are formed by causing the portions facing each other through the groove in the vicinity of the center in the length direction of the antenna body to project inward, It is preferable to form a capacitive element as a reactance element by utilizing this overlapping portion.

In the present invention, for the purpose of preventing the influence of the human body when worn on the arm, a reactance element is connected to the antenna body across the groove at the central position in the longitudinal direction, and the antenna body is The opening is formed so that the degree of formation increases from the end side toward the connecting position of the reactance element.

Alternatively, in the arm mounting band, the thickness of the back surface side is increased from the end side thereof toward the connection position point of the reactance element to the antenna body. In this case, on the back surface side of the arm mounting band, a protrusion that increases from the end side thereof toward the vicinity of the connection position of the reactance element to the antenna body is formed to reduce the thickness of the back surface of the arm mounting band. It is preferable to increase the thickness of the reactance element on the connection position side to the antenna body.

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

Here, as the antenna loss reduction structure,
On the end surface of the antenna body formed by rolling the metal plate, a structure in which the rolling direction in the rolling process and the direction of the current are matched, 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 that a high dielectric constant material layer is laminated on at least one surface side of the antenna body so that it can cope with radio waves of high wavelength without lengthening the antenna body.

[0026]

【Example】

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

In these figures, in the wrist mounting type portable radio 1 of this example, two bands 2a and 2b (arm mounting bands) are attached to both sides of the radio main body 1a (apparatus main body). The antenna body 13 is configured by using the antenna plate 11 fixed to the bands 2a and 2b. Note that the ends of the band 2a and the ends of the band 2b are coupled by the clasp 1f, and there is no need for the antenna plates 11 to be electrically connected to each other.

As shown in FIG. 2, a data display device for displaying various information is provided on the front side of the radio main body 1a (the outer side when the arm-mounted portable radio 1 is worn on the arm). 3 and conductor plates 4a and 4b for forming a part of the antenna body are arranged. Here, the band 2a,
Antenna plate 11 (11a, 11
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 is formed in which the groove 13c is formed between them.

Inside the radio main body 1a, as shown in FIG. 3, the conductor plates 4a and 4b, the circuit board 5, and the conductors are arranged from the upper side (the side on which the data display device 3 is located) toward the lower side. A reflective plate 6, a battery 8 and a 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 on the inner layer portion thereof. The reflector 6 is electrically connected to one of the electrodes of the battery 8 via a terminal plate 7. This ensures the high-frequency ground characteristics on the lower side of the conductor plates 4a and 4b. 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 reflection plate 6 are electrically connected by two connectors 12b.

In this example, the circuit board 5 is arranged on the lower surface side of the conductor plates 4a and 4b of the antenna body 13,
The circuit board 5 and the antenna body 13 have two terminal plates 12a.
Are electrically connected by. This connecting portion is a power feeding portion to the antenna body 13 or a connection point of the reactance element, and the power feeding portion is a conductor plate 4 near the terminal plate 12a.
a and 4b. Therefore, in the antenna body 13,
Antenna plates 11a and 11b (or antenna plate 11
c, 11d), a portion close to the power feeding portion, or the conductor plate 4a (or the conductor plate 4b) is a portion where the high frequency impedance is high and the radio wave emission is the strongest.

In the wrist-worn portable wireless device 1 configured as described above, since radio waves are transmitted and received on the front surface side (the data display device 3 side), the radiated energy of the radio waves is transmitted to the data display device 3 side. The loss is reduced by constructing it to have directivity.

That is, the circuit board 5 having a high-frequency ground pattern surface and the reflector plate 6 are arranged on the lower surface side of the conductor plates 4a and 4b so that they function as a reflector and directivity is improved. It is concentrated on the side of the data display device 3. Further, in the arm-mounted portable radio 1 of this example, when the arm-mounted portable radio 1 is mounted on the arm, the arm comes into contact with the back cover 9, but the antenna body 13 is removed 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 high sensitivity.

This effect is combined with the operation of the wrist-worn portable radio device 1 of this example, and FIGS. 4 (a), 4 (b) and 5 are shown.
Will be described in detail.

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

First, in FIGS. 4A and 4B, a groove 13c is formed in the antenna body 13 along its center line, and the antenna body 13 has a central portion in the longitudinal direction. 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 the capacitor 18 having an appropriate capacity. The capacitor 18 is mounted on the circuit board 5.

In such a slot antenna, when the magnetic field on the polarization plane 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 direction component perpendicular to c. The center of radiation of radio waves is in 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 when a dipole antenna is assumed 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 body 13
Is a slot antenna and is a magnetic current antenna (magnetic field sensitive antenna). Therefore, when the base plate 10 is provided in a state of being parallel to the antenna body 13 and spreading in the central portion thereof, FIG.
As shown by the solid line 19 in (b), the radiation pattern characteristics are
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 base plate 10, and the antenna body 13 (the conductor plate 4).
It is arranged on the lower surface side of a, 4b) so as not to interfere with the radiation of radio waves from the antenna body 13 to the front surface side. Also,
The circuit board 5 and the reflection plate 6 as the base plate 10 have the directional gain increased to about twice due to the effect (image effect) as a reflector on the front surface side. Furthermore, when the arm-mounted portable radio 1 is mounted on the arm, the arm itself is located on the lower surface side of the circuit board 5 and the reflection plate 6, and the arm itself also functions as the ground plane 10. This phenomenon is a result of positively utilizing 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
Are configured inside the transmission / reception wireless unit 102 of the circuit 100 shown in FIG. In this circuit 100, the antenna body 1
A transmission / reception radio unit 102 and a waveform shaping circuit 10 for 3
3, a power supply control circuit 104 that controls power supply to these circuits, and a control unit 105 that controls the power supply control circuit 104 are formed. In this example, further, the control unit 1
P-ROM (programmable read-only memory) in which the unique call number compared in 05 is recorded
106, a RAM (random access memory) 109 in which transmission information associated with the fixed call number is recorded, and an LCD drive circuit 110 for controlling an LCD 112 (liquid crystal display device) 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, and these power supply control circuit 104, control unit 105, and RAM 10 are formed.
The message processing unit 114 is composed of the LCD driving circuit 110 and the oscillation circuit 111. Also,
The message processed by the message processing unit 114 is LC
An alarm drive circuit 107 for displaying that the message is displayed at D112 and for transmitting that a message is stored, an alarm device 10 such as a buzzer, an LED or a vibrator 10
8. An external operation unit 113 for operating the wireless device is also configured.

Here, in the case of the single super-heterodyne system, the transmission / reception radio section 102 has an RF amplifier 201 (high frequency amplification circuit) for the antenna body 13 as schematically shown in the block diagram of FIG. 6 (a). 14), the mixer 202, and the IF amplifier 203, and C
The frequency division ratio signal corresponding to the desired frequency from the PU 206 is PL
When output to the prescaler 207 of L200, the prescaler 207 outputs the VCO 208 based on the frequency division ratio signal.
The frequency is divided by 1 and the square wave signal of, for example, 51 kHz is output to the phase comparator 209. Reference oscillator 21
0 always oscillates at 50 kHz, and
Since there is a deviation of 1 kHz from the square wave signal of kHz, the phase comparator 209 outputs a square wave signal having a pulse width corresponding to the deviation of 1 kHz, and the low-pass filter 211 outputs the square wave signal. 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 super-heterodyne system, the received high frequency signal and the output of the oscillator are mixed by the mixer 2
The received signal is demodulated after being mixed in 02 and converted into an intermediate frequency corresponding to these differences. Here, the intermediate frequency is generally 455 kHz. The frequency of the reference oscillator 210 is, for example, 2
There is also a case of ~ 3 MHz. 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 is one in which the decoder 205 and the CPU 206 in FIG. 6A are integrated.

On the other hand, in the direct conversion system, the RF amplifier 301 (high frequency amplification circuit 14), the mixer 302, and the low-pass filter are provided for the antenna body 13 as schematically shown in the block diagram of FIG. 6 (b). Filter 30
3, detector 304, decoder 305, and CPU3
No. 06 is configured, and unlike the single superheterodyne system, conversion to an intermediate frequency is not 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 and the oscillation frequency of the local oscillator 307 are the same, and a signal enters the baseband under this condition.

The RF 20 shown in FIGS. 6 (a) and 6 (b) is used.
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 transmitting / receiving radio section 102 via the antenna body 13 and converted into a rectangular wave by the waveform shaping circuit 103. Electric power is supplied to the waveform shaping circuit 103 and the transmission / reception wireless unit 102 under control of the control unit 105 and the power supply control circuit 104 only during a time when a signal is received. The control unit 105 generates a battery saving timing signal for managing such power supply, controls the power supply control circuit 104, and performs bit synchronization and frame synchronization with the received signal. Further, the peculiar calling signal recorded in the P-ROM 106 is compared with the reception signal supplied from the waveform shaping circuit 103 with error control to determine whether or not the peculiar calling signal recorded is called. A decision is made. It also 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 user is notified of the call by the alarm device 108 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 outputs the message from the oscillation circuit 111. The message is displayed on the LCD 112 while being controlled based on the generated clock signal.

As described above, in the arm-mounted portable radio device 1, since the feeding point is set at the center of the antenna body 13, the portion where the radiant energy of radio waves is maximum is narrow. It will be located inside the main body 1a. Here, since various parts made of an insulating material such as a circuit board 5, a loss material, and a conductive material are arranged inside the wireless device main body 1a, the antenna body 1 is different from the conventional one.
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. 7, and the sensitivity is lowered.

On the other hand, in this example, as shown in FIG. 8, the circuit board 5 is arranged on the lower surface side of the antenna body 13,
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 disposing the circuit board 5 and the reflection plate 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-worn portable wireless device 1 of this example shows a high directivity toward the front surface side of the wireless device main body 1a as indicated by the solid line 20. Further, by arranging the circuit board 5 and the reflector 6 on the lower surface side of the antenna body 13, it is possible to shield the influence from the human body, so that even when worn on the arm,
The impedance matching between the radio transmitter / receiver side and the antenna body side is not broken.

Example 2 In Example 1, when disposing the circuit board 5 on the lower surface side of the conductor plates 4a and 4b, the conductor plates 4a and 4b were disposed 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 are
Is the front surface side of the radio main body 1a (the data display device 3 side)
It is located on the back side of the case 1c which is covered with the.

Here, in order to prevent the conductor plates 4a and 4b from covering the data display device 3, in this example, the conductor plates 4a and 4b are arranged outside the data display device 3, as shown in FIG. Has been done. Therefore, in this example, since the data display device 3 as well as the circuit board 5 is not provided on the upper surface side of the antenna body 13, the radio wave radiated from the antenna body 13 is
Since it is not attenuated, the radiant energy can be further increased.

The conductor plate 4 on the side of the radio main body 1a
a, 4b and the antenna plate 11a on the side of the bands 2a, 2b
11d to 11d, in addition to the structure in which they are connected around the radio main body 1a, the conductor plates 4a, 4
A structure in which b and the antenna plates 11a to 11d are integrally formed can also be adopted. Further, as shown in FIG. 11A, the end portions 4g of the conductor plates 4a and 4b are projected from the radio device main body 1a side, and the antenna plate 11a is attached to the end portions 4g.
It is also possible to adopt a structure in which ~ 11d are connected inside the bands 2a, 2b.

Further, as shown in FIG. 11 (b), the outer frame 1b of the radio main body 1a and the conductor plates 4a, 4b are integrally formed, and conductors are provided along the inner peripheral surface of the outer frame 1b. Plate 4a,
A structure in which 4b is incorporated may be adopted.

Embodiment 3 FIG. 12 is a plan view of the periphery of a radio main body of a wrist-worn portable radio 30 according to the third embodiment. Note that the arm-mounted portable radio device 30 of this example and the arm-mounted portable radio devices according to Examples 4 to 18 described below all have a basic configuration of the arm-mounted portable radio device according to Example 1. Since it is the same as that of the portable radio device of the type, the same reference numerals are given to the parts having the common functions, and the detailed description thereof will be omitted.

In the wrist-worn portable wireless device 30 of this example, the wireless device main body 1a is a hand type timepiece, and the hands 23 for indicating the time,
It has a dial 24 and a crown 25, and the conductor plate 4 is provided on the surface side (so-called bezel portion) of the outer frame 30a of the dial 24.
a and 4b are formed. The conductor plates 4a and 4b are antenna plates 11a to 11a inside the bands 2a and 2b, respectively.
The electric conductor plates 4a and 4b and the antenna plates 11a to 11d that are electrically connected to 11d form an antenna body 13 (slot antenna) in which a groove 13c is formed.

Also in the wrist-worn portable radio device 30 having the above-mentioned structure, the conductor plates 4a and 4b are provided in the radio device main body 1.
It is on the surface side (a dial side) of a. Where the dial 24
Is a non-metal, it does not block the radiation of radio waves from the conductor plates 4a and 4b. Further, the conductor plates 4a and 4b are located on the upper surface side (clock face side) with respect to the circuit board 5 arranged inside the radio main body 1a. Therefore, with respect to the antenna body 13, since the feeding points are set on the conductor plates 4a and 4b corresponding to the central portion in the lengthwise direction, the portion where the radio wave radiant energy is maximum is the portion of the radio main body 1a. It will be located on the front side. Therefore, according to the wrist-worn portable wireless device 30 of this example, the radiant energy of the radio wave is not attenuated. Further, the circuit board 5 and the like arranged on the lower surface side of the antenna body 13 function as a reflector, and the directivity can be improved. Moreover, since the influence from the human body can be shielded by the circuit board 5 or the like, the matching state between the radio transmitter / receiver side and the antenna body side does not deviate even when worn on the wrist.

Embodiment 4 FIG. 13 is a plan view of the periphery of a radio body of an arm-mounted portable radio 35 according to Embodiment 4.

Also in the wrist-worn portable radio device 35 of this example, when a part of the antenna body 13 is formed inside the radio device main body 1a, the conductor plates 4c to 4f are formed on the outer frame 35a thereof. 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 conductor patterns 29a and 29b. The conductor plates 4c to 4f are the band 2 respectively.
a, 2b are electrically connected to the antenna plates 11a to 11d inside, and these conductive patterns 29a,
29b, conductor plates 4c to 4f, and antenna plate 11a.
To 11d, the antenna body 1 in which the groove 13c is formed
3 (slot antenna) is configured. The data display device 3 is also provided with the conductive patterns 29a and 29b, the segment electrodes 32, and the circuit pattern 31 for applying a voltage for driving the segment electrodes 32.

Here, the display surface 3a of the data display device 3
Is located on the front surface side of the wireless device main body 1a, the conductive patterns 29a and 29b are also located on the front surface side of the wireless device main body 1a.
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, the display on the data display device 3 is not hindered.

Also in the wrist-worn portable radio device 35 having the above-mentioned structure, since the feeding point is set to the conductive patterns 29a and 29b corresponding to the central portion of the antenna body 13, the radiated 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-worn portable wireless device 35 of this example, the radiant energy of the radio wave is not attenuated, and the image effect of the circuit board 5 arranged on the lower surface side of the antenna body 13 causes
The directivity can be further improved. In addition, Example 1
Similarly, since the influence from the human body can be shielded, the matching state between the radio transmitter / receiver side and the antenna body side does not shift even when worn on the wrist.

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

Embodiment 5 FIG. 14A shows a wrist-worn portable radio device 38 according to this embodiment.
FIG. 14B is a side view of the surroundings of the wireless device main body of FIG.

In the wrist-worn portable wireless device 38 of this example, the wireless device main body 1a is a hand type timepiece, and the hands 23 for 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 in which a groove 39c is directed to the outer peripheral side with respect to the outer frame 38a, and the bands 2a and 2b connected to the radio main body 1a. Has not been formed. That is,
The antenna body 39 has an end portion 39d on the side of the band 2b in the outer frame 38a, and makes one round on the outside of the outer frame 38a from the end portion 39e on the opposite side to return to the side of the band 2b. It is arranged.

In the wrist-worn portable radio device 38 thus constructed, the antenna body 39 is located outside the radio body 1a, so that the radio wave radiated from the antenna body 39 is blocked outside. There is nothing. In particular, the antenna body 39
On the other hand, the 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 that blocks the radiated radio waves. Therefore, according to the wrist-worn portable wireless device 38 of this example, the radiant energy of the radio wave is
It is not attenuated and exhibits high sensitivity due to the image effect of the circuit board arranged inside the radio main body 1a and the outer frame 38a itself.

Sixth Embodiment FIG. 15 is an external view showing the overall structure of the wrist-worn portable radio device 40 of this example, FIG. 16 is a sectional view taken along the line XY, and FIG. 17 is its ZU. It is sectional drawing in a line.

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

Although such a coupling mechanism is generally adopted in wristwatches and the like, it is necessary to electrically connect the ends of the antennas to each other in the conventional wrist-worn portable radio using a loop antenna. Therefore, I was not able to adopt it. On the other hand, in this example, since the slot antenna is used, it is not necessary to electrically connect the ends of the antenna, so that such a simple coupling method can be adopted. Further, 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 toward the radio body side, but in this example, the buckle 67 is removed from the antenna body 13. Since it is in an insulated and separated state, it is not necessary to take measures against static electricity, and it can be handled like a normal wristwatch.

As shown in FIG. 16, antenna plates 11a to 11d are built in the bands 2a and 2b. As will be described later, the antenna bodies 11a and 11b are electrically conductive inside the radio main body 1a. Conductive connection is made to the body plate 4a, and the antenna plates 11c and 11d are conductively connected to the conductor plate 4b arranged inside the radio main body 1a.

16 and 17, in the radio main body 1a, the circuit board 5 is horizontally arranged inside the case 401, and the upper surface side thereof (the side on which the data display device 3 is located).
Then, the switch 1s is connected via the conductive rubber 406. Further, the 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 3, and its panel 3b is conductively connected to the circuit board 5 via the conductive rubber 407. A protective lens 3d is arranged on the upper surface side of the panel 3b, and an optical reflection plate 3c for the panel 3b is arranged between the panel 3b and the circuit board 5.

Further, conductor plates 4a and 4b are arranged above the circuit board 5, and antenna plates are provided at the ends of the conductor plates 4a and 4b through connection pins 405 penetrating the case 401. The ends of 11a to 11d are conductively connected. Further, the conductor plates 4a and 4b are conductively connected to the front surface 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, but the conductor plates 4a and 4b are the inner surface of the case 401 as shown in the upper corner of the panel frame 3a in FIG. The conductor plate 4a is formed along the
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 conductively 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 has the electrode 404.
Is connected to the ground pattern of the circuit board via. The back side of the case 401 is closed by the back cover 9.

Here, in order to configure the radio device circuit 102 and the like shown in FIGS. 5 and 6, on the upper surface side of the circuit board 5, as shown in FIG. 16, from the X direction to the Y direction, A decoder 503, a CPU 504, a digital circuit component 506, etc. are mounted to form a digital circuit 5a. Further, on the lower surface side of the circuit board 5 (the side of the back cover 9),
As shown in FIG. 16, a circuit element 1 forming a high frequency amplifier circuit 14 (RF amplifier) from the X direction to the Y direction.
4a, RF-IC 513, analog circuit component 519, etc. are mounted, and as shown in FIG.
Toward the direction, the chip capacitor 514, the tantalum capacitor 515, the RF-IC 513, the shield case 4
An analog circuit 5b is formed by mounting the local oscillation circuit element 512a and the local oscillation circuit board 512b covered with the reference numeral 8, a crystal oscillator 511 (reference oscillator), and the like. The positional relationship between them will be described in detail with reference to FIGS. 18 and 19.

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, the 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 the contacts 16a to 16d. It is connected. A capacitor 18 is inserted between the contacts 16c and 16d among the contacts 16a to 16d. Further, on the upper surface side of the circuit board 5, from the U direction to the Z direction, a chip capacitor 505, a decoder 503, a CPU for forming the digital circuit 5a.
504, DC-DC converter 501, E2-PROM
502 and the like are mounted, and the digital circuit 5a processes digital data such as a data decoding circuit, a central processing circuit, a data storage circuit, a data display circuit, a phase control circuit, and a phase comparator used in a radio device. All circuits for are configured. Further, a panel drive terminal 407a of the data display device 3 is also formed.
Here, the DC-DC converter 501 is arranged at a position deviated to the Z direction side of the circuit board 5 and is closer to the conductor plate 4a than the conductor plate 4b.

On the other hand, on the lower surface side of the circuit board 5, as shown in FIG. 19, from the U direction to the Z direction, the tantalum capacitor 51 for forming the analog circuit 5b.
5, high frequency amplifier circuit 14, chip capacitor 514, R
The F-IC 513, the local oscillation circuit 512 covered with the shield case 47, and the crystal oscillator 511 are arranged. The oscillator circuit 512 and the crystal oscillator 511 are the most Z of the circuit board 5.
It is located on the direction side. Further, 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 the capacitor 46a are formed. Here, the contact 16e is the circuit board 5
Since it is conductively connected to the contact 16a on the front side of the through a through hole, the high frequency amplifier circuit 14 is conductively connected to the conductor plate 4b. 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, the 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.

A wrist-worn portable radio device 4 having such a configuration
In Fig. 20, the characteristic points of the cross section are schematically shown in Fig. 20, the antenna plates 11a to 11d fixed to the two bands 2a and 2b, and the conductive material arranged inside the radio main body 1a. The antenna body 13 in a state where the body plates 4a and 4b are connected to each other and the groove 13c is formed between them.
The (slot antenna) is in a configured state. Here, the conductor plate 4a is connected to the ground 15 of the circuit board 5 at the contact 16b. On the other hand, the conductor plate 4b
Is connected to the high-frequency amplifier circuit 14 at the contact 16a. The high frequency amplifier circuit 14 is also connected to the ground 15 of the circuit board 5 and is 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, which is the source of the noise signal, is arranged in the vicinity of the conductor plate 4a. Also,
Of the analog circuit 5b, the crystal oscillator 511 (here, a natural frequency of 90 MHz) that is a source of a noise (interference) signal and the local oscillation circuit 512 are also arranged in the vicinity of the conductor plate 4a, and the conductor plate 4b. Are located away from noise signal generation sources such as the crystal unit 511, the local oscillation circuit 512, and the DC-DC converter 501. Therefore, even if a noise signal is radiated from the local oscillator circuit 512, the DC-DC converter 501, or the like, the conductor plate 4a is not connected to the ground 1.
Since it is connected to 5 and has low impedance at high frequency,
A noise signal does not enter the conductor plate 4a. On the other hand, the conductor plate 4b has high impedance at high frequencies, but since it is located away from the digital circuit 5a, no noise signal enters it.

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 therefore the local oscillation of itself tends to enter the antenna body 13 as noise. However, in the wrist-worn portable wireless device 40 of this example, the conductor plate 4a of high impedance is close to the conductor plate 4a of high frequency, and the conductor plate of high impedance is high. Since the local oscillation circuit 512 is arranged at a position far from 4b, that is, at the same position as the DC-DC converter 501 of the digital circuit 5a, the noise signal emitted from the local oscillation circuit 512 is not emitted 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. in the circuit 100 shown in FIG. From this, it is possible to prevent noise signals from entering the conductor plate 4b by separating these circuits from the conductor plate 4b that has high impedance at high frequencies.

Further, as schematically showing the characteristic points of the vertical section in FIG. 21, inside the wireless device main body 1a, like the arm-mounted portable wireless device 1 according to the first embodiment, the conductor plate 4a is provided. Four
The 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. Moreover, even in the wrist-worn portable radio device 40 of this example, when the wrist-worn portable radio device 40 is attached to the arm, the arm comes into contact with the back cover 9, but the antenna body 13 does not
Since it is shielded from the arm by the or reflector plate 6, it is not affected by the human body.

Embodiment 7 FIG. 22 (a) is a lateral cross-sectional view of the periphery of the radio body of the wrist-worn portable radio 45 of this embodiment.

Also in the arm-mounted portable radio device 45 of this example, as in the arm-mounted portable radio device 1 according to the first embodiment, two bands 2a and 2b (arms) are provided on both sides of the radio device body 1a. Antenna plates 11a to 1 fixed to a mounting band)
1d and the conductor plate 4 arranged inside the radio main body 1a
a and 4b are connected to each other and have a groove 13c between them.
The antenna body 13 (slot antenna) in the state where is formed is formed. Inside the radio body 1a,
The circuit board 5 having a high-frequency ground pattern surface and the 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 concentrated on the data display device 3 side. I am letting you. Also, in the wrist-worn portable radio device 45 of this example, when the wrist-worn portable radio device 45 is attached to the arm, the arm comes into contact with the back lid 9, but even in this state, the antenna body 13 does not touch the back lid 9 or the reflection. 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, like the wrist-worn 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 at the contact 16b.
The conductor plates 4a and 4b, which are connected to a, are in an unbalanced relationship and have a potential difference. Further, the conductor plate 4a has a digital circuit 5 as compared with the conductor plate 4b.
It is arranged in the vicinity of a noise signal generation source such as the DC-DC converter 501 of a.

In this example, the conductor 4a is the radio body 1a.
It is divided into two parts inside, and its ends 4h, 4
Both i are connected to the negative electrode (ground potential) of the battery 8 (button battery). Therefore, the conductor 4a has a lower impedance.

In the wrist-worn portable radio device 45 configured as described above, the digital circuit 5a also includes a noise signal generation source such as the DC-DC converter 501. In this example as well, the digital circuit 5a has a noise signal source. While the low-impedance conductor plate 4a is arranged in the vicinity, and the high-impedance conductor plate 4b is arranged at a position separated from the low impedance conductor plate 4a, the noise signal radiated from the digital circuit 5a is transmitted to the conductor plate 4a.
The same effects as in Example 6 are obtained, such as difficulty in entering a and 4b.

When connecting the end portions 4h and 4i of the conductor 4a via the battery 8, it may be connected via the positive electrode of the battery 8 from the viewpoint of a circuit handling high frequency signals. In this case, the contact 16b of the conductor plate 4a
And a ground 15 of the circuit board 5, a capacitor (reactance element) having a low impedance in a high frequency region is inserted as indicated by a dotted line 46.

Embodiment 8 FIG. 22 (b) is a lateral cross-sectional view of the periphery of the main body of the arm-mounted portable radio 47 of this embodiment.

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

The conductor 4a is connected to the inside of the main body 1a of the radio 2a.
In the divided state, both ends 4h and 4i are connected to a shield case 48a that covers the noise signal source of the digital circuit 5a and the analog circuit 5b.
Therefore, 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 connecting to the positive electrode, the contact 16b and the ground 1 are connected.
A low-impedance capacitor may be inserted between the first and second terminals.

In the wrist-worn portable radio device 47 configured as described above, even if a noise signal leaks from the shield case 48a, the low impedance conductor plate 4a is arranged in the vicinity of the shield case 48a while being separated from it. Since the high impedance conductor plate 4b is arranged at the position
Noise signals are less likely to enter the conductor plates 4a, 4b.
The same effect as that of the sixth embodiment is achieved.

For example, in the conventional wrist-worn portable radio device, in the superheterodyne system shown in FIG. 6A, the frequency of the signal emitted by the reference oscillator 210, for example, 50 kHz and its n-times frequency ( n
Generates a noise signal in the vicinity of a natural number), and in the direct conversion system shown in FIG.
The crystal oscillator 7 generates noise signals, and the levels of these noise signals are represented by the solid line 50 in FIG. Further, the level of digital noise generated by the other digital circuits is represented by the solid line 51, and any noise is at a high level. Particularly, in the direct conversion method, the tuning frequency of the antenna 13 is matched with the oscillation frequency of the local oscillator, so that the oscillation signal of the local oscillator easily jumps into the antenna body 13. On the other hand, Examples 6 to 8
According to the wrist-worn portable wireless device of the present invention, since the conductor plate 4b having high impedance in high frequency is separated from the noise source, noise is less likely to enter the antenna body 13.
The noise level can be reduced until it is represented by the solid line 52.

Embodiment 9 FIG. 24 is a vertical cross-sectional view of the periphery of a radio body of a wrist-worn portable radio 55 of this example.

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

Embodiment 10 FIG. 25 is an explanatory view showing the structure of the antenna body of the wrist-worn portable radio device 60 of this embodiment.

The arm-mounted portable radio 4 according to the sixth embodiment is provided in the radio body 1a of the arm-mounted portable radio 60 of this example.
Bands 2a, 2 for attaching it to the arm, similar to 0
b is attached. A buckle 67 as a means for connecting the bands 2a and 2b is attached to the end side 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 body 13.

A conductor plate 4 is provided inside the radio main unit 1a.
The antenna plates 11 (11a to 11d) are fixed to the bands 2a and 2b. The antenna plates 11a to 11d are electrically connected to each other through the conductor plates 4a and 4b to form the antenna body 13.

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

On the other hand, inside the radio main body 1a, near the other end 1a "(so-called 12 o'clock side of the wristwatch) to which the band 2a is connected, the ground 15 is connected to the side of the conductor plate 4a and the conductor 15 The high frequency amplifier circuit 14 is connected to the side of the plate 4b, which is a so-called feeding point 66b, and the feeding point 66b is connected to the capacitor 18.
It is set to be shifted from the connection position of. The high-frequency amplifier circuit 14 is connected to the circuit at the subsequent stage via the 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.

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

Since the antenna body 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 an arbitrary position of 1 is represented by the following formula.

Z = V / I Therefore, the impedance is extremely high in the vicinity of the connection position of the capacitor 18. On the other hand, the input impedance of the high frequency amplifier circuit 14 is 50Ω to 100Ω. Therefore, in order to perform impedance matching between the antenna body 13 side and the high-frequency amplifier circuit 14 side, it is necessary to lower the impedance on the antenna body 13 side, and for that purpose, the feeding point 66b from the connection point of the capacitor 18 It is necessary to shift to a position where the impedance is low.

FIG. 27 shows the input impedance characteristic of the antenna body 13 of this example, which is the impedance characteristic when the antenna body 13 is viewed from the feeding point 66b. In this figure, the solid line L20 indicates
The input impedance characteristics when the feeding point 66b is set near the connection position of the capacitor 18, the solid line L21 indicates that the antenna plate 1 is different from the connection position of the capacitor 18.
The input impedance characteristics when the feeding point 66b is set at the intermediate position on the side 67a of the 1a and 11c, and the solid line L22 shows the input impedance characteristics when the feeding point 66b is set near the ends of the antenna plates 11a and 11c. is there. Further, the circular region drawn by the solid line L19 indicates the optimum impedance range on the high frequency amplifier circuit 14 side. Therefore, the feeding point 66b is displaced from the position on the antenna body 13 showing the impedance characteristic passing through the circular region drawn by the solid line L19, that is, from the connection position of the capacitor 18 to near the intermediate position between the sides 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, the feeding point 66b is set to the antenna body 13 side.
When impedance matching is performed with the side of the high frequency amplifier circuit 14, 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 properly displaced 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 structure of the conventional wristwatch, the band length of the band 2b (the so-called 6 o'clock side of the wristwatch) is longer than that of the band 2a (the so-called 12 o'clock side of the wristwatch). In the machine body 1a, the capacitor 18 is connected at a position closer to one end 1a ', and the feeding point 66b is displaced from that by a distance corresponding to the length dimension of the radio body 1a, and closer to the other end 1a ". The feeding point 66b is provided at the position of 1. By such a configuration, the capacitor 18 can be connected to the central position of the antenna body 13 in the length direction, and the feeding point 66b is set at a position deviated from the central position. Both conditions can be met.

Example 11 FIG. 28 (a) is an explanatory view showing the structure of the antenna body of the wrist-worn portable radio 70 of this example, and FIG. 28 (b) shows the structure of the holes formed in the band. It is an explanatory view shown. FIG. 28
In (a), in the arm-mounted portable radio device 70 of this example, the lengths of the antenna plates 11b and 11d are set to the antenna plate 11
It is set longer than the lengths of a and 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 are formed.
A capacitor 62 is incorporated on the side of the band 2b to which is fixed.

Further, 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 for the purpose of increasing the bonding strength of the bands 2a and 2b. The antenna plates 11b and 11d are formed with an expansion portion 71 in which the width of the groove 13c is expanded. Therefore, the antenna plates 11b and 11d are formed with a narrow portion, but the current distribution of the antenna plates 11b and 11d has
Since it concentrates on 1p, the sensitivity of the antenna body 13 will be high even if a narrow portion is formed in the antenna plates 11b and 11d.
Does not fall.

In this example, when the capacitor 62 is installed inside the band 2b, the antenna plates 11b and 11d are
You are using yourself. That is, as shown in an enlarged view of the structure of the capacitor 62 in FIGS. 29 and 30, a step 7 is formed toward the antenna plate 11d on the antenna plate 11b side.
The flat plate portion 71b that projects from the upper surface side via 1a is provided, while the flat plate portion 72 that projects from the lower surface side via the step 72a toward the antenna plate 11d on the antenna plate 11d side.
b, and the dielectric material 73
Is filled. Therefore, the opposing 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,
When the facing distance of 72b is d, the capacitor C is in a state in which the capacitance C is expressed by the following equation.

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

As the dielectric material 73, leather, silicone resin, urethane resin, or the like can be used. In this case, the material of the bands 2a and 2b can be used as they are, so that the band 2a, The capacitor 62 can be formed at the same time when the 2b is molded. Where band 2
The relative permittivity εr of the materials a and 2b is set to 3 to 5, and the flat plate portion 7
The facing 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
The capacitance C of pF is obtained, and with this capacitance value, the capacitor 62 that satisfies the conditions for use in the wrist-worn portable wireless device 70 used in the UHF frequency band can be configured.

Twelfth Embodiment FIG. 31 is a perspective view showing the structure of the antenna body arranged inside the band of the wrist-worn portable radio device of this embodiment.

In this example, the capacitor 6 is used in the antenna body 13 of the wrist-worn portable radio device 70 according to the eleventh embodiment.
Holes 77 (openings) are formed in the vicinity of the flat plate portions 71b, 72b formed to form the No. 2 structure. These holes 7
7 is formed at high density in the vicinity of the flat plate portions 71b and 72b, is formed at low density from there to the end portions 11p and 11q, and is not formed at the end portions 11p and 11q.

In the wrist-worn portable radio device, the flat plate portion 71
b and 72b have high impedance and are strongly affected by the human body when the arm-mounted portable radio is worn on the arm. Therefore, the antenna body 13 side and the high-frequency amplifier circuit side connected to the antenna body 13 side The impedance matching with
It causes a decrease in sensitivity. However, in this example, since the hole 77 is formed in the high impedance portion, the area facing the arm is substantially small in that portion, so that the human body is unlikely to be affected. Even in this case, the flat plate portions 71b, 7
Since the current distribution is small near 2b, the holes 7
Even if 7 is formed, the resistance loss does not increase. 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 the loss resistance from increasing because this portion has a large current distribution.

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

Embodiment 13 FIG. 33 is a plan view of an antenna body arranged inside the band of the wrist-worn portable radio device of this embodiment, and FIG. 34 is a sectional view thereof.

The wrist-worn portable radio device of this example is the same as that of the first embodiment.
A wrist-worn portable radio device having all of the structural features of the wrist-worn portable radio device according to
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 does not easily rust, such as stainless steel, and the antenna plate 11 is manufactured through a rolling process in which the material is compressed and stretched. Therefore, the antenna plate 11
There are fine irregularities wavy on the surface of. To illustrate the direction of the unevenness, the peak portion of the unevenness is shown by a dotted line 80a in FIG. Here, when a high frequency signal flows through the antenna plate 11, the current flows through the surface of the antenna plate 11 due to the skin effect. Therefore, the thickness (Skin
depth) δ is expressed by the following formula using the permeability μ 0 of the material in vacuum, the frequency f of the high frequency signal, and the conductivity σ of the material. Therefore, there is no discrepancy between the direction of unevenness and the direction of current. , Which causes an increase in loss resistance.

Δ = 1 / √ (πfμ0σ) Therefore, in this example, as shown in FIG.
In the end portion 11p having a large current distribution, 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 to reduce the resistance loss. There is.

Further, in this example, as shown in FIG.
The direction of the unevenness (dotted line 80a) and the direction of the current (shown by the arrow 80b) are provided on both surface sides where the current flows due to the skin effect.
While the upper layer 83 and the lower layer 84 which coincide with are provided, in the intermediate layer 85 thereof, the direction of the unevenness and the direction of the current (arrow 8
This is indicated by 0b. ) Are orthogonal to each other. Therefore,
In this example, since the antenna plate 11 is provided with the upper layer 83, the intermediate layer 85, and the lower layer 84 which are different in rolling direction, and the bending strength of the antenna plate 11 is also high, the arm-mounted portable radio device is used as an arm. Even if a large force is repeatedly applied to the antenna plate 11 every time it is attached to the antenna, it does not break.

Embodiment 14 Further, as shown in FIG. 35, in order to reduce the resistance loss while keeping the strength of the antenna body 13 high, the arm-mounted portable radio device of the antenna plate 11 is mounted on the arm. For the portion 11r to which a large force is repeatedly applied during mounting, a plate material 86 in which the direction of the irregularities formed by the rolling process (dotted line 80a) is aligned with the longitudinal direction is used, and the end portion 11 with 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 (shown by the arrow 80b) match may be used.

Fifteenth Embodiment As shown in FIG. 36, the antenna plate 11 is used for the purpose of reducing the resistance loss while keeping the strength of the antenna plate 11 high.
Among them, the plate member 88 in consideration of the strength is used for the portion 11r to which a large force is repeatedly applied when the wrist-worn portable wireless device is worn on the arm, while the end portion 1 having a large current distribution is used.
In 1p, a plating layer 89 of copper or silver having high conductivity may be formed on both sides of the plate material 88. In this case, the thickness of the plated layer 89 is set to the thickness δ at which the current penetrates the antenna plate 11.
Set the thickness above.

Embodiment 16 FIG. 37 is an explanatory view showing the inner structure of the band of the wrist mounting type portable radio device of this embodiment, and FIG. 38 is its sectional view.

In the wrist-worn portable radio device of this example, the width direction from the end 2s on the side connected to the radio main body 1a to the vicinity of the center 2t where the hole 69 is formed is 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 the same as those in the first to first embodiments.
It is configured to have the features of the wrist-worn portable radio device according to No. 5.

The portions of the antenna plates 11b and 11d fixed to the end 2s of the band 2b tend to be affected by the arm 90 because of their high impedance, but in this example, they are located closer to the end 2s. A high protrusion 91a is provided to secure a large gap between the antenna plates 11b and 11d 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. Therefore, the low protrusion 91a is formed so that the bands can be easily coupled to each other. In addition, in the length direction of the band 2b, the side of the end portion 2s connected to the radio main body 1a has the arm 9
Since it corresponds to a portion having a large curvature in the state of being attached to 0, the protrusion 91a is made high to facilitate bending.

Therefore, according to the arm-mounted portable radio device of this example, the part of the antenna plates 11b and 11d that has a high impedance and is easily affected by the arm 90 or the like is 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.

Example 17 In the example 12, the protrusion 91a extending in the width direction was formed as the protrusion formed inside the band 2b, but instead of this, as shown in FIGS. The protrusion 92a may be formed. Also in this case, the end 2s of the band 2b on the side connected to the radio main body 1a
Since the antenna plates 11b and 11d fixed to the antenna have high impedance and tend to be easily influenced 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 and. Therefore, in the wrist-worn portable wireless device of this example, the part of the antenna plate 11 having a high impedance is not affected by the arm 90 and the like, so that the antenna impedance does not shift and high sensitivity is maintained. You can Further, in the length direction of the band 2b, the high protrusion 92a is formed on the side connected to the wireless device main body 1a, so that the band 2b is easily bent.

Embodiment 18 FIG. 41 is a horizontal cross-sectional view showing an exploded radio body side of a wrist-worn portable radio 95 of this embodiment, and FIG. 42 is a vertical cross-sectional view thereof.

In the wrist-worn portable radio device 95 of this example, two bands (not shown) are attached to both sides of the radio device body 1a. A data display device 3 for displaying various kinds of information and its panel frame 3a are formed on the front surface side of the radio main body 1a, and its side position is
Conductor plates 4a and 4b are arranged. Antenna plates 11 (11a to 11d) are fixed to the band, and fixed plates 96a of these antenna plates 11 are leaf springs whose contact pins 96b are formed at the ends of the conductor plates 4a and 4b, respectively. The antenna body 13 as a slot antenna is configured by being electrically connected via 96c. The antenna plate 11 and the conductor plates 4a and 4b are screwed to each other by using the screw holes 96d formed in the fixing plate 96a of the antenna plate 11.

As shown in FIG. 42, the data display device 3, the circuit board 5 on which each circuit group is mounted, the battery frame 97, the battery 8, and the back cover (not shown) are arranged inside the radio main body 1a. No.) 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 is formed.
A high dielectric material layer 98 such as —TiO ₂ , TiO ₄ , BaO ₃ or a low loss dielectric ceramic layer is laminated.
Further, a high dielectric material layer 99 such as BaO—TiO ₂ , TiO ₄ , BaO ₃ or low loss dielectric ceramics is laminated on the upper and lower surfaces of the antenna plates 11a to 11d. 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 resin (relative dielectric constant of 3.2 to 4.8) or a silicon resin (compared to the relative dielectric constant) that constitutes the band. It has a high relative permittivity as compared with 3).

In the wrist-worn portable radio device 95 thus configured, the circuit board 5 is located on the lower surface side of the conductor plates 4a and 4b. Therefore, as in the first embodiment, the conductors 4a and 4b are separated from each other. The effect is that radio waves are radiated without being blocked by the circuit board 5. Furthermore, in this example, the conductor plate 4
a, 4b and the antenna plate 11 on the high dielectric material layer 98,
99, and these high dielectric material layers 98, 9 are formed.
The wavelength λ ′ of the electromagnetic wave propagating through 9 is represented by the following equation using the wavelength λ in air and the relative permittivity ε of the dielectric substance. The larger it is, the shorter it is.

Λ ′ = λ / √ε Therefore, as the permittivity of the high-dielectric-constant material layers 98 and 99 is larger, the same effect as when the circumferential length of the groove 13c of the antenna body 13 is extended is obtained. Therefore, the antenna gain for long-wave electromagnetic waves can be improved without extending the circumferential length of the groove 13c, that is, without lengthening the antenna body 13.

Other Examples The high dielectric material layer 9 was added to the antenna body 13 of this example.
The configuration in which 8 and 99 are provided can be added to the wrist-worn portable wireless device according to the first embodiment and can be added to the wrist-worn portable wireless device according to another embodiment.

Further, the features of the wrist-worn portable radios according to the above-described first to eighteenth embodiments may be combined, and for example, the feature points of the first to sixth, tenth, thirteenth and sixteenth embodiments may be combined. Since there is no circuit board on the front side of the antenna body, it does not block the radio waves emitted from the antenna. The high impedance side of the antenna body is
Since it is the low impedance side of the antenna body that is apart 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 antenna bodies are connected with different lengths on both sides of the device body, the 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 side of the arm mounting band is large, the influence of the antenna body on the human body in the mounted state can be mitigated. Moreover, the resistance loss of the antenna body can be reduced.
Therefore, in the wrist-worn portable wireless device, it is possible to collectively solve the problems that have hindered the improvement of sensitivity, and obtain high sensitivity.

[0131]

As described above, the present invention is characterized in that the antenna body is arranged above the circuit board in the apparatus main body. Therefore, 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 that blocks the radio waves radiated from the antenna, so the 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 faces the outer circumference, the surface side of the antenna body shields radiated radio waves. Since there is no, the sensitivity is improved.

One side of the portion of the antenna body facing each other through the groove in the main body of the antenna is located farther from the noise signal generating 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, the noise signal does not enter the antenna body, so that the sensitivity is improved. In particular, in a direct conversion type wireless device, since the tuning frequency of the antenna body and the oscillation frequency of the local oscillator are matched, noise of the local oscillator easily enters the antenna body, but even in this case, high impedance becomes high in high frequency. By providing the local oscillator at a position away from the antenna portion, it is possible to suppress the influence of noise on the wireless device itself.

When the antenna body is fixed to the arm mounting bands with different lengths on both sides of the device body, the optimum position within the device body and deviated from the connection position of the reactance element. The feeding point can be set to improve the sensitivity.

When the openings are formed at a high density near the connection position of the reactance element with respect to the antenna body, or
When the thickness of the back side of the wristband is increased near the position where the reactance element is connected to the antenna body, the influence of the human body on the high impedance part of the antenna body can be mitigated, so impedance matching can be maintained. The sensitivity is improved.

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

[Brief description of drawings]

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

FIG. 2 is a plan view of the periphery of a radio body of the wrist-worn portable radio shown in FIG.

FIG. 3 is a vertical cross-sectional view around the radio body of the wrist-worn portable radio shown in FIG.

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-worn portable radio device shown in FIG. It is a figure.

5 is a block diagram showing a circuit configuration for operating the wrist-worn portable radio device shown in FIG.

6A is a block diagram showing a configuration of a single super-heterodyne type radio circuit, and FIG. 6B is a block diagram showing a configuration of a direct conversion type radio circuit.

FIG. 7 is an explanatory diagram showing the directivity of a general wrist-worn portable radio when a slot antenna is used.

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

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

FIG. 10 is a cross-sectional view of the periphery of the wireless device main body of the wrist-worn portable wireless device shown in FIG.

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

FIG. 12 is a plan view of the periphery of a radio body of an arm-mounted portable radio according to a third embodiment of the present invention.

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

FIG. 14 (a) is a plan view of the periphery of a radio main body of an arm-mounted portable radio according to a fifth embodiment of the present invention, and FIG. 14 (b) is a side view thereof.

FIG. 15 is a perspective view showing an appearance of an arm-mounted portable radio device according to Embodiment 6 of the present invention.

16 is an X-Y of the wrist-worn portable radio device shown in FIG.
It is sectional drawing in a line.

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

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

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

20 is a vertical cross-sectional view schematically showing characteristic points of the cross-section of the wrist-worn portable wireless device shown in FIG.

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

22A is a lateral 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.
It is a cross-sectional view of the periphery of the radio | wireless machine main body of the arm mounting type portable radio | wireless machine which concerns on Example 8 of this invention.

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

FIG. 24 is a vertical cross-sectional view of the periphery of a wireless device body of an arm-mounted portable wireless device according to a ninth embodiment of the present invention.

FIG. 25 is an explanatory diagram of an antenna body of a wrist-worn portable wireless device according to Embodiment 10 of the present invention.

26 is an explanatory diagram showing current and voltage distributions in the antenna body shown in FIG. 25.

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

FIG. 28 (a) is an explanatory diagram showing a configuration of an antenna body of a wrist-worn portable radio device according to an eleventh embodiment of the present invention,
(B) is explanatory drawing which shows the structure of the hole formed in the band.

29 is an explanatory diagram showing a structure of a capacitor configured in the antenna body shown in FIG. 28.

30 is an explanatory diagram showing a structure of a capacitor formed in the antenna body shown in FIG. 28.

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

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

FIG. 33 is a plan view of an antenna body arranged inside the band of the wrist-worn portable radio device according to the thirteenth embodiment of the present invention.

34 is a cross-sectional view of the antenna body shown in FIG. 33.

FIG. 35 is a plan view of the antenna body arranged inside the band of the wrist-worn portable radio device according to the fourteenth embodiment of the present invention.

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

FIG. 37 is an explanatory view showing the inner structure of the band of the wrist-worn portable radio device according to the sixteenth embodiment of the present invention.

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

FIG. 39 is an explanatory diagram showing the inner structure of the band of the wrist-worn portable radio device according to the seventeenth embodiment of the present invention.

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

FIG. 41 is a transverse cross-sectional view showing the exploded radio body side of the wrist-worn portable radio device according to Embodiment 18 of the present invention.

42 is a longitudinal cross-sectional view showing the radio body side of the wrist-worn portable radio device shown in FIG. 41 in an exploded manner.

[Explanation of symbols]

1, 35, 38, 40, 45, 47, 55, 60, 7
0, 95 ... Arm-mounted portable radio device (arm-mounted antenna device) 1a ... Radio device body (device body) 1b, 30a, 35a, 38a ... Outer frame 2a, 2b ... Band (Band for arm wearing) 3 ... Data display device (display unit) 4a, 4b, 4c to 4f ... Conductor plate 4g to 4i ... End of conductor plate 5 ... Circuit board 5a ... -Digital circuit 5b ... Analog circuit 6 ... Reflector 8 ... Battery (power supply element) 10 ... Base 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 ... Feed point 71 ... Extended portion 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 generation source) 512 ... Local oscillation circuit (noise generation source)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04B 1/08 N // H04B 7/26 U 9297-5K

Claims (26)

[Claims] 1. An apparatus main body having a circuit board having a circuit group formed therein, to which an arm mounting band is connected, and a device body fixed to the apparatus main body and the arm mounting band, and having a groove formed in a longitudinal direction. The antenna device according to claim 1, wherein the antenna body is disposed above the circuit board in the main body of the apparatus. 2. The arm-mounted antenna device according to claim 1, further comprising a reflecting member in the main body of the device, which is located below the antenna body to increase an antenna gain by an image effect. 3. The apparatus body according to claim 1, wherein:
An arm-mounted antenna device, comprising a display unit capable of displaying information on its front surface side, and wherein the antenna body is located on both sides of the display unit inside the device body. 4. The apparatus main body according to claim 1, wherein
An arm-mounted antenna device having a display unit capable of displaying information on its front surface side, and in the device body, the antenna body is formed as a transparent conductive thin film layer on the display unit. . 5. An apparatus main body having a circuit board having a circuit group formed therein, to which an arm wearing band is connected, and an outer frame member of the apparatus main body, which is fixed to a side surface and has a groove formed in a length direction. The antenna device according to claim 1, wherein the antenna body has a groove, and the groove of the antenna body faces the outer peripheral side of the outer frame member. 6. An apparatus main body having a circuit board having a circuit group formed therein, to which an arm mounting band is connected, and a device body fixed to the apparatus main body and the arm mounting band, and having a groove formed in the length direction. An antenna body, and one side of the portion of the antenna body facing each other through the groove in the device body is connected to the reference potential side of the high frequency amplifier circuit included in the circuit group. The wrist-worn antenna device is connected to the signal potential side of the high-frequency amplifier circuit at a position distant from the noise signal generation source included in the circuit group. 7. The arm mounting type antenna device according to claim 6, wherein the other side is connected to the reference potential side via a reactance element. 8. The wrist-worn 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 body that covers the noise signal generation source. 10. The circuit according to claim 6, wherein the one side is arranged above the circuit board, and the local oscillation circuit included in the circuit group is formed on a lower surface side of the circuit board. A wrist-mounted antenna device. 11. The wrist-worn 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 having a circuit group formed therein, to which arm mounting bands are connected on both sides,
An antenna body fixed to the apparatus main body and the arm mounting band and having a groove formed in the length direction, and a reactance element connected across the groove at the center position of the antenna body in the length direction. The antenna body has antenna plates fixed to the arm mounting band with different lengths on both sides of the device body,
An arm-mounted antenna device, wherein a feeding point for the antenna body set at a position separated from the connection position of the reactance element by a predetermined distance is located inside the device body. 13. The antenna plate according to claim 12, wherein a shorter one of the antenna plates is arranged on a side of the arm mounting band on which a buckle for coupling the arm mounting bands is attached. The arm mounting antenna device, wherein the longer antenna plate is arranged on the arm mounting band on the side where the locking hole for hanging the pin of the buckle is formed. 14. The stopper hole according to claim 13,
An arm-mounted antenna device, which is 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 is formed with an expanded portion having a groove width corresponding to an 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 mounting type antenna device according to claim 12, wherein the reactance element is built in a side of the arm mounting band to which the longer antenna plate is fixed. 17. The antenna plate according to claim 16, wherein, in the longer antenna plate, portions facing each other through the groove in the vicinity of the center in the length direction of the antenna body are projected inward. An arm mounting type antenna device, wherein an overlapping portion of antenna plates 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 having a circuit group formed therein, to which an arm mounting band is connected, and a device body fixed to the apparatus main body and the arm mounting band, and having a groove formed in a longitudinal direction thereof. An antenna body, the reactance element is connected to the antenna body across the groove at a central position in the longitudinal direction, and the antenna body is connected to the reactance element from its end side. 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 in which a circuit group is formed, to which an arm mounting band is connected, and an apparatus main body fixed to the apparatus main body and the arm mounting band to form a groove in a length direction. And an antenna body, the reactance element is connected to the antenna body over the groove at a central position in the longitudinal direction thereof, and the arm mounting band is connected to the reactance element from the end side thereof. An arm-mounted antenna device, wherein the thickness of the back side is increased toward the connection position point to the antenna body. 20. The arm according to claim 19, wherein a protrusion is formed on a back surface side of the arm mounting band so as to become higher from a terminal side thereof to a position near a connection position of the reactance element to the antenna body. An arm-mounted antenna device, wherein the thickness of the back side of the wearing band is thicker on the side where the reactance element is connected to the antenna body. 21. An apparatus main body having a circuit board having a circuit group formed therein, to which an arm mounting band is connected, and a device body fixed to the apparatus main body and the arm mounting band to form a groove in a longitudinal direction. An arm-mounted antenna device, comprising: a resistance loss reducing structure that reduces electrical resistance to high-frequency current at a terminal portion thereof to reduce resistance loss. 22. The antenna loss reduction structure according to claim 21, wherein a rolling direction in the rolling process and a current direction are matched on a terminal end surface of the antenna body formed by rolling the metal plate. An arm-mounted antenna device having a different structure. 23. The arm-mounted antenna device according to claim 21, wherein the antenna loss reduction structure is a structure in which a metal layer having good electrical conductivity is coated on a surface of a distal end portion of the antenna body. 24. An apparatus main body having a circuit board having a circuit group formed therein, wherein arm mounting bands are connected to both sides,
On both sides of the device main body, there are antenna bodies that are fixed to the arm mounting band with different lengths, respectively, and have a groove formed in the longitudinal direction, and the antenna body has the circuit in the device main body. In the upper position of the substrate, one side of the portions facing each other through the groove generates 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, characterized in that the arm-mounted antenna device is connected to the signal potential side of the high-frequency amplifier circuit at a position remote from the source. 25. The arm mounting type antenna device according to claim 1, wherein a high dielectric constant material layer is laminated on at least one surface side of the antenna body. 26. A radio equipment provided with an arm-mounted antenna device, characterized by using the arm-mounted antenna device as defined in any one of claims 1 to 25.