JPH08298405A - Portable radio equipment antenna - Google Patents

Abstract

PURPOSE: To surely detect an incoming call and to avoid blocking by a head to the antenna by locating a helical antenna element horizontally in the standby state and the element vertically in the speech state so as to detect its magnetic field and its electric field. CONSTITUTION: A projection 7 is supported by a turning means 9 to be turned in directions of the arrows C, D and they are made of a conductive material. A helical antenna element 4 is fixed to the projection 7 by a feeding section 10. Thus, the power is supplied from a transmission reception circuit 3 to the element 4 via a connection member 8. Then the element 4 is arranged to a notch 6 in the standby state and set vertically to a magnetic field component of an incoming wave to suppress its electric field component and to maximize the magnetic field component, then the fluctuation in the magnetic field component of the incoming wave is detected. Furthermore, in the speech mode, the element 4 is turned in the direction of the arrow C to be removed from the notch 6 and to set the element 4 in the same direction as the electric field component of the incoming wave, then the electric field component of the incoming wave is detected without hindrance by the head or the like of the user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio antenna which is excellent in portability during standby and has excellent antenna gain.

[0002]

2. Description of the Related Art Generally, in order to improve the portability of a portable wireless device, an antenna portion arranged outside the casing of the portable wireless device during a call is often stored inside the casing during standby. It is desirable that transmission / reception, especially incoming call can be detected even when the antenna unit is housed in the housing.

For example, in Japanese Patent Laid-Open No. 03-245630, a first antenna section consisting of a loading section is provided at the tip of a second antenna section which can be housed inside the housing of a portable radio, and a second antenna section is provided during standby. There is disclosed a portable wireless device in which an antenna unit is housed inside a housing and an incoming call is detected by a first antenna unit protruding from the housing. In such a portable wireless device, since the first antenna unit is not a rod-shaped antenna but a spiral loading unit, it is possible to reduce the amount of antenna protrusion from the housing during standby, and the portable antenna during standby. You can improve the property. In addition, the first antenna unit is used for standby and the second antenna unit is used for communication.
Since the incoming call can be detected and the call can be made by the antenna part, it is not necessary to provide a built-in antenna or the like, and a switching means for the built-in antenna and an arrangement space are not necessary and the size can be reduced. The first and second antenna units are both operated as electric field detection type antennas, and incoming calls are detected by detecting electric field components of radio waves.
Further, Japanese Patent Laid-Open No. 05-183320 discloses a portable wireless device having a configuration suitable for portability, which uses a directional antenna, for example, an inverted F antenna or a microstrip antenna.

[0004]

The conventional portable wireless device antenna is configured as described above, and the first antenna portion which is projected outside from the portable wireless device housing is used for detecting an incoming call during standby. By. However, a somewhat high antenna gain is required to detect an incoming call, etc.
The antenna part has a certain effective length so as to have a predetermined antenna gain, and the protrusion of the antenna part due to this effective length hinders portability during standby.
Further, if the first antenna unit is made too small to improve portability, on the contrary, there is a problem that the effective length of the antenna performance is shortened, the antenna gain is lowered, and incoming call detection and the like cannot be performed.

Therefore, the present invention has been made to solve the above problems, and is excellent in portability when a user is carrying in a pocket of a jacket and antenna gain when carrying while waiting for communication. It is an object of the present invention to provide a new mobile wireless device antenna that can reliably detect an incoming call.

[0006]

According to a first aspect of the present invention, there is provided a portable wireless device antenna, a portable wireless device housing, a transmitting / receiving circuit housed in the portable wireless device housing, and an electric circuit for the transmitting / receiving circuit. And a helical antenna element fixed to the protruding portion of the rotating means, the rotating means having a protruding portion rotatably supported by the portable wireless device housing, and the rotating antenna. By means of the means, the helical antenna element is rotated in the horizontal direction during standby to function as an antenna for magnetic field detection, and during communication, the helical antenna element is rotated in the vertical direction to operate as an antenna for electric field detection. Is.

A portable wireless device antenna according to the invention of claim 2 is a portable wireless device housing, a transmitting / receiving circuit housed in the portable wireless device housing, and electrically connected to the transmitting / receiving circuit. Rotating means having a rotatable protrusion supported on the upper part of the portable wireless device casing, an antenna housing fixed to the protruding of the rotating means, and provided inside the antenna housing. , A helical antenna element electrically connected to the transmission / reception circuit through the protruding portion is provided, and by rotating the antenna housing portion, the helical antenna element is horizontally rotated during standby to detect a magnetic field. As an antenna for use in a telephone call, the helical antenna element is rotated in the vertical direction to operate as an antenna for electric field detection.

According to a third aspect of the present invention, there is provided a portable wireless device antenna, wherein the antenna housing portion of the second aspect is a fixed portion fixed to the rotating means and a movable portion slidable with respect to the fixed portion. And one end of the helical antenna element is fixed to the projecting portion of the rotating means, and the other end is fixed to the movable portion.

According to a fourth aspect of the present invention, there is provided a portable wireless device antenna, a portable wireless device housing, a transmitting / receiving circuit housed in the portable wireless device housing, and an electrical connection to the transmitting / receiving circuit. Rotating means having a rotatable protrusion supported on the portable wireless device housing, an antenna housing portion fixed to the protruding portion of the rotating means, and the antenna housing portion housed in the antenna housing portion. And a helical antenna element electrically connected to the helical antenna element, and is provided so as to be housed inside the helical antenna element, electrically insulated from the helical antenna element when housed, and electrically connected to the helical antenna element when pulled out. And a linear antenna element connected to the.

According to a fifth aspect of the present invention, there is provided a portable wireless device antenna, wherein a notch portion is provided in an upper portion of the portable wireless device housing according to the second, third or fourth aspect, and the notch portion is provided. The antenna storage section is attached to the.

According to a sixth aspect of the present invention, there is provided a portable wireless device antenna in which a transmitting / receiving circuit is housed and a notch portion is provided in an upper portion on the back side, and the transmitting / receiving circuit is electrically connected. And a rotation means having a rotatable projection supported by the cutout portion of the portable wireless device housing, and fixed to the projection portion of the rotation means and mounted in the cutout portion. Antenna storage part, and stored in this antenna storage part,
A helical antenna element electrically connected to the projecting portion is provided, and the helical antenna element for magnetic field detection when the antenna housing portion is attached to the cutout portion by rotating the antenna housing portion. As an antenna
The helical antenna element is operated as an electric field detecting antenna when the helical antenna element is separated from the cutout portion.

[0012]

In the portable wireless device antenna according to the first aspect of the present invention, the helical antenna element is rotated horizontally or vertically by the rotating means so that the helical antenna element is an antenna for magnetic field detection during standby. As an antenna for electric field detection during a call.

In the portable radio device antenna according to the second aspect of the present invention, the antenna housing portion is rotated to rotate the helical antenna element horizontally or vertically, and the magnetic field is detected when the helical antenna element is on standby. The antenna operates as an antenna for electric field detection during a call.

According to a third aspect of the present invention, there is provided a portable wireless device antenna, wherein one end of the helical antenna element is fixed and the other end of the helical antenna element is fixed to the fixed portion of the antenna housing. The part slides, and the helical antenna element expands and contracts in the axial direction.

In the portable radio device antenna according to the fourth aspect of the present invention, when a linear antenna element which is provided so as to be accommodated inside the helical antenna element is accommodated inside the helical antenna element, the antenna is linear. The antenna element and the helical antenna element are electrically insulated from each other, and when pulled out from the inside of the helical antenna element, the linear antenna element and the helical antenna element are electrically connected.

In the portable wireless device antenna according to the fifth aspect of the present invention, the antenna housing portion is attached to the notch provided in the upper portion of the portable wireless device housing.

According to a sixth aspect of the present invention, there is provided a portable radio device antenna, wherein the antenna storage part is attached to a notch provided on an upper portion of a rear side of the portable radio device housing by rotating the antenna storage part. At this time, the helical antenna element operates as an antenna for magnetic field detection, and when the helical antenna element separates from the cutout portion, the helical antenna element operates as an antenna for electric field detection.

[0018]

【Example】

Example. 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG.
FIG. 1 is a rear perspective view showing a portable wireless device according to an embodiment of the present invention, FIG. 1 (a) is a use state during communication standby or a call, and FIG. 1 (b) is use during a communication call. Each state is shown. 1 (a) or 1 (b), 1 is a portable wireless device housing, 2 is a rechargeable battery detachably attached to a battery housing portion provided on the back side of the portable wireless device housing 1. The unit 3 is housed inside the portable wireless device housing 1 and is a transmission / reception circuit that is driven by the power supplied from the battery unit 2. Reference numeral 4 is a helical helical antenna element wound around a predetermined antenna length and a predetermined peripheral length. Reference numeral 5 denotes an antenna housing portion which is made of, for example, a dielectric resin and which houses the helical antenna element 4 therein, and 6 is provided by cutting out the rear side of the upper portion of the portable wireless device housing 1 so that the helical antenna element 4 is housed inside. The stored antenna storage part 5 is shown in Fig. 1.
A notch portion 7 to be mounted as shown in (a) is rotatably supported on the upper portion of the portable wireless device housing 1, and a protruding portion of a rotating means (described later) to which the antenna housing portion 5 is fixed. , 8 are connecting members such as wires for electrically connecting the transmitting / receiving circuit 3 and the projecting portion 7 of the rotating means, and the power of the battery unit 2 is supplied to the rotating means via the transmitting / receiving circuit 3 and the connecting member 8 in order. It is supplied to the protrusion 7. In addition, in FIG. 1B, the antenna housing portion 5 is shown to show the state of the helical antenna element 4.
The configuration is partially cut away.

The size and shape of the antenna housing 5 is determined by the size of the helical antenna element 4 housed inside (antenna length, antenna perimeter or antenna diameter), but the notch 6 is notched. Figure 1 for example
If the antenna storage part 5 is provided in conformity with the shape of the antenna storage part 5 as shown in (a), when the antenna storage part 5 is attached to the cutout part 6, the helical antenna element 4 and the antenna storage part 5 are provided.
The antenna part consisting of does not protrude from the portable wireless device housing 1,
It becomes excellent in portability during standby.

FIG. 2 shows how the electric power supplied from the transmitter / receiver circuit 3 is supplied to the helical antenna element 4. The upper part of the portable radio shown in FIG. It is the partial explanatory view expanded and shown. In FIG. 2, reference numeral 9 is a rotation means for rotatably holding one end of the protruding portion 7, and rotating the held protruding portion 7 in the direction of arrow C or D, and 10 is one end of the helical antenna element 4 is fixed. It is a power feeding portion of the protruding portion 7. By forming both the rotating means 9 and the protruding portion 7 from a conductive member such as metal, the electric power supplied from the transmitting / receiving circuit 3 via the connecting member 8 is fed from the feeding portion 10 of the protruding portion 7 to the helical antenna element 4. Is powered. As the rotating means 9, for example, a rotary bearing as shown in FIG. 2 or a spherical bearing may be used to rotate the antenna housing portion 5. Further, the portable wireless device shown in FIG. 2 is one in which one end of the helical antenna element 4 is directly fixed to the power feeding portion 10 of the projecting portion 7, but in addition to this, the one shown in FIG. 3 is also considered. To be

FIG. 3 is a structural diagram showing a specific structure of the antenna housing portion 5 fixed to the projecting portion 7, and is shown so that the internal structure of the antenna housing portion 5 can be understood for the sake of explanation. As shown in FIG. 3, a cylindrical antenna mounting portion 11 is provided in the antenna housing portion 5, and the antenna mounting portion 11 is also formed of a conductive member such as metal. The antenna housing portion 5 is attached to the portable wireless device housing 1 by inserting the protruding portion 7 into the cylinder of the antenna attachment portion 11. Then, one end of the helical antenna element 4 is fixed to the outer peripheral portion of the antenna mounting portion 11, and when the antenna housing portion 5 is mounted on the protruding portion 7, the electric power from the transmission / reception circuit 3 is transferred from the fixed point 12 to the helical antenna element 4. Power is supplied. Reference numeral 13 denotes a detachable member, and by attaching and detaching the detachable member 13 to and from the detachable portion 14 provided on the protruding portion 7, the antenna housing portion 5 can be detached from the protruding portion 7. If the helical antenna element 4 is not directly fixed to the projecting portion 7 in this way, the antenna housing portion 5 is configured to be attachable to and detachable from the projecting portion 7 so that, for example, when an antenna part fails or is used. The antenna part can be easily replaced, such as when it is desired to replace the antenna with one having different performance depending on the conditions and the like, which is extremely practical.

Next, the operation of the above-described portable wireless device antenna according to the present invention will be described separately for the communication standby mode and the communication mode. FIG. 4 is an explanatory view showing a use state of the portable wireless device during communication standby, and the portable wireless device antenna according to the present invention has an antenna housing portion 5 as shown in FIG. It is used while attached to the notch 6 of 1. FIG. 4 (a) shows the relationship between the user 15 carrying the portable radio device according to the present invention in the chest pocket of his jacket and the like and the incoming wave 17 transmitted from the base station 16, and FIG. 4) shows a portable wireless device antenna according to the present invention, as shown in FIG.
5 shows an antenna operation model of the helical antenna element 4 when it is arranged in the vicinity of 5 (human body having conductivity). Generally, it is troublesome to carry a portable wireless device in your hand for a long time, so it is often carried in a jacket pocket or bag except when you are on a call, especially because it is easy to take out when receiving. Often carried in the chest pocket of a jacket.

As shown in FIG. 4A, when the user carries the helical antenna element 4 and the electric power from the transmission / reception circuit 3 is supplied to the helical antenna element 4, the helical antenna element 4 becomes a human body (a conductive member). The tangential component in the vicinity, that is, the electric field component becomes extremely close to 0 (zero), and conversely, the magnetic field component becomes maximum, and the antenna operates as a magnetic field detection antenna. FIG. 4B is an equivalent view showing one circumference of the helical antenna element 4 in order to explain this phenomenon. In FIG. 4B, 18 is one of the helical antenna elements 4. One loop system, 19 is a central axis of the loop system 18, and 20 is an image antenna of the helical antenna element 4 which is assumed by a boundary condition of electromagnetics (described later). It can be considered that in-phase currents ± i facing the actual helical antenna element 4 are flowing in the arrow direction as shown in FIG. 4B. When the spirally formed antenna element is arranged in the vicinity of a conductive member such as a human body, an image antenna can be assumed in order to explain the antenna radiation characteristic of the spiral structure antenna. That is,
In the portable radio device antenna according to the present invention, the helical antenna element 4 is attached to the notch 6 of the portable radio device casing 1 as shown in FIG. The incoming call is detected by detecting the magnetic field component of the incoming wave transmitted from the base station.

Although there are various types of radio waves for mobile communication, the system using vertical polarization is the most general system for land mobile communication in particular, and the base station 16 transmits in this embodiment as well. The incoming wave 17 is assumed to be vertically polarized. As shown in FIG. 4A, this vertically polarized wave causes a magnetic field component 22 in the horizontal direction with respect to the ground surface 21,
It has a characteristic that an electric field component 23 is generated in the vertical direction.

FIG. 5 is a block diagram showing a concrete configuration of the incoming wave 17, and various communication information includes a magnetic field component 22 in the x-axis direction (horizontal direction) and an electric field component 23 in the y-axis direction (vertical direction). It is added to both components. The portable wireless device antenna according to the present invention has these magnetic field component 22 and electric field component 2
An incoming call is detected by detecting the magnetic field component 22 among the three, and further transmission / reception is performed.

Now, as shown in FIG. 4A, the reason why the portable wireless device antenna according to the present invention operates as a magnetic field detecting antenna when carried by the user's chest is shown in FIGS. 6 and 7. Will be explained. FIG. 6 is an explanatory diagram for explaining replacement of a spiral current with an equivalent line magnetic current and an equivalent line current. A spiral current Je flowing through an antenna having a spiral structure is a loop current as shown in FIG. It can be considered as being divided into the component JeΦ and the current component JeZ in the axial direction. And the stacking of the loop-shaped current component JeΦ is J
It can be seen that the radiation characteristic of the helical antenna replaced with mZ is composed of the magnetic current component JmZ and the electric field component JeZ.

It is generally known that a system in which a magnetic current is evenly distributed inside a certain cross section creates the same electric field as a system of a current flowing so as to surround the circumference of the cross section. Therefore, it can be said that the loop-shaped current is equivalent to the linear magnetic current flowing through the loop-shaped current, and the stack of the loop-shaped current component JeΦ can be replaced with the linear magnetic current JmZ as shown in FIG. When the cross-sectional area is small enough, even if the magnetic current is concentrated on the central axis, the electric field generated from this is almost unchanged.)

When the antenna element 4 having such a spiral structure is housed in the notch portion 6 of the portable wireless device housing 1 as shown in FIG. 4A and is carried around the chest of the user 15. The antenna characteristics of the antenna element 4 are as shown in FIG. FIG. 7A shows the electromagnetic flow distribution characteristics of the helical antenna element 4 and the image antenna 20 shown in FIG. 4B, and is a view of the portable wireless device according to the present invention as seen from above. The power supply unit 1 is provided on the lower side of FIG.
0, and the helical antenna element 4 is fed from the feeding portion 10 in the direction of arrow 24. In addition, FIG.
The electromagnetic flow distribution characteristics of can be replaced as shown in FIG. 7B based on the description of the radiation characteristics of the spiral structure antenna shown in FIG. As described above, when the helical antenna element 4 having the spiral structure is arranged in the vicinity of a conductive member, for example, a human body, the helical antenna element 4 is subjected to the above-described electromagnetic boundary conditions, and therefore the helical antenna element 4 shown in FIG. ), The magnetic current component J′mZ of the image antenna 20 flows in the same direction as the magnetic current component JmZ of the helical antenna element 4 to strengthen JmZ, and conversely the current component J′m ′. eZ flows in the direction opposite to the current component JeZ of the helical antenna element 4, weakens JeZ, and operates as a magnetic current antenna for magnetic field detection.

More specifically, in the state shown in FIG. 4A, the helical antenna element 4 is always out of phase by π / 2 due to the boundary condition of electromagnetics described above. Always has the maximum magnetic field component and operates as an antenna for magnetic field detection.

Further, in order to detect the fluctuation of the magnetic field, it is necessary to make the position, the direction of arrangement, etc. of the helical antenna element 4 appropriate. If the arrangement of the antennas is different, the magnetic field cannot be detected even with an antenna having a spiral structure, for example. Generally, in a system in which a current flows so as to surround a certain cross section, when a current flows in the system, a magnetic field is generated in a direction perpendicular to the cross section. That is, a current flows through the spiral structure antenna and the magnetic field can be detected, for example, in the direction 2 in which the antenna element 4 changes the magnetic field as shown in FIG.
5 is a case in which it is spirally wound along a plane substantially perpendicular to 5, and in the mobile communication system using the vertical polarization method as in this embodiment, the magnetic field component 2 of the incoming wave 17 is 2
4A, the helical antenna element 4 for detecting the variation of the magnetic field component 22 has its loop system 18 in which the variation direction of the magnetic field component 22 is generated. And should be placed along a plane that is nearly vertical. In addition, since the display unit, key buttons, etc. are generally arranged on the front side of the portable wireless device, in the portable wireless device that is required to be downsized, the notch 6 is provided in the portable wireless device casing from the viewpoint of effective use of space. It is preferable that the antenna housing portion 5 is provided on the back side of the antenna 1 and the notch portion 6 provided on the back side of the antenna housing portion 5 is housed.

Therefore, the portable wireless device antenna according to the present invention has a central axis of the helical antenna element 4 when the antenna housing portion 5 is mounted on the rear side of the upper portion of the portable wireless device housing 1 and in the notch portion 6. As shown in FIG. 1 (a) or (b), the notch 6 is provided in the upper part of the portable wireless device housing 1 so that 19 is parallel to the ground surface 21. Attached to the notch 6, the user can see in FIG.
As shown in (a), when carried on the chest, a current flows through the helical antenna element 4 in response to a change in the magnetic field, and the magnetic field component 22 of the incoming wave 17 can be detected.

Conventionally, there is a device in which the antenna part is folded to the radio device casing side during standby and the tip is detached from the radio device casing during a call, but in a portable radio device having such a structure, for example, Even if the antenna part 26 is placed in the chest pocket 27 of the user and arranged in parallel with the ground surface 21 as shown in FIG. Therefore, the fluctuation of the magnetic field cannot be detected.

Further, when operating as an antenna for magnetic field detection, there are various conditions regarding the size and shape of the helical antenna element. FIG. 10 is a waveform diagram of the incoming wave 17 and the perimeter (or antenna diameter) of the helical antenna element 4.
FIG. 11 is an explanatory diagram showing a relationship with, and will be described below with reference to FIG. 10. The incoming wave 17 has, for example, a waveform as shown in FIG. 10, and if the perimeter of the helical antenna element 4 is configured to be too long with respect to the wavelength of the incoming wave 17 as in the antenna loop system 28, for example. The currents flowing through the elements cannot be regarded as having the same phase (weakened each other), and the antenna gain decreases. Therefore, the perimeter of the helical antenna element 4 is, for example, the antenna loop system 2
9 so that currents of the same phase may flow through the antenna element 4 as shown in FIG.
It is desirable to set the length to 0λ or less.

Next, the communication call will be described. The portable radio antenna according to the present invention is shown in FIG.
It is used in the state shown in (a) or FIG. 1 (b). When the helical antenna element 4 is used in the state shown in FIG. 1 (a), it operates as an antenna for magnetic field detection as described above, but the antenna housing portion 5 is rotated in the direction of arrow A to move it to the position shown in FIG. 1 (b). When used in the state as shown in, it operates as an antenna for electric field detection. That is, in the state shown in FIG. 1A, the electric field component is erased due to the boundary condition of electromagnetics, and the antenna becomes a magnetic field detection antenna.
In the state as shown in (b), the central axis 19 of the helical antenna element 4 is in substantially the same direction as the vertically polarized electric field component 23, and in this state, the fluctuation of the magnetic field component cannot be detected, and conversely only the electric field component can be detected. It operates as an antenna for electric field detection.

When the position registration information and the like are exchanged after the detection of the sticking state to shift to the call state, the user 15 takes out the portable wireless device from the state shown in FIG. 4 (a) and talks with the other party. However, in that case, when the antenna housing portion 5 is in a state as shown in FIG. 1A, the head of the user 15 is likely to interfere with transmission and reception of radio waves.
It is difficult to continue reliable transmission and reception. Therefore, in such a case, the antenna housing portion 5 is rotated from the notch portion 6 of the portable wireless device housing 1 in the direction of the arrow A to be detached, and the central axis of the helical antenna element 4 is perpendicular to the ground surface 21. Arrange so that As a result, the helical antenna element 4 has a long effective length, and the electric field component 23 of the incoming wave 17 can be efficiently detected.

As described above, in the portable wireless device antenna described in the present embodiment, the antenna housing portion 5 is rotated in the direction of the arrow B at the time of stand-by or during a call to form the notch portion 6 as shown in FIG. 1 (a). Arranged and the helical antenna element 4 arrives 1
7 is in a state of being spirally wound along a surface substantially perpendicular to the direction of the magnetic field component 22 of 7, the electric field component of the helical antenna element 4 is suppressed, the magnetic field component becomes maximum, and the magnetic field of the incoming wave 17 is maximized. The fluctuation of the component 22 can be detected, and during the call, the antenna storage part 5 is rotated in the direction of arrow A to be detached from the notch part 6 as shown in FIG.
By arranging the central axis 19 of the helical antenna element 4 to be substantially in the same direction as the direction of the electric field component 23 of the incoming wave 17, the electric field of the incoming wave 17 is not disturbed by the head of the user 15 during a call. The component 23 can be detected efficiently.

Example. 2 Next, another embodiment of the present invention will be described. FIG. 11 is a rear view showing a portable wireless device antenna according to another embodiment of the present invention, and this embodiment shows a portable wireless device antenna in which an antenna housing portion is configured so that a helical antenna element can expand and contract. In FIG. 11 (a) or FIG. 11 (b), 30 is a member having a spring property, for example, a helical antenna element formed of a superelastic alloy such as NiTi, which is less plastically deformed in a wide temperature range, 31 is a protrusion 7. The fixed portion of the antenna housing portion fixed to 32 is a movable portion of the antenna housing portion in which the other end of the helical antenna element 30 is fixed and which slides in the arrow E or F direction with respect to the fixed portion 31.
The helical antenna element 3 is provided on the fixed portion 31.
The first locking portion for holding the movable portion 32 in the state shown in FIG. 11 (a) when 0 is contracted, and 34 denotes the helical antenna element 30 when the helical antenna element 30 is extended. The second locking portion 35 for holding in the state shown in b) is engaged with the first locking portion 33 or the second locking portion 34, and the movable portion 32 is moved to the state shown in FIG. Figure 11
As shown in (b), it is an engaging portion that is held by the fixed portion 31, and the fixed portion 31 and the movable portion 32 form the antenna housing portion 3.
6 are configured. In this embodiment, the fixed portion 31 is provided with the first and second locking portions 33 and 34, but some locking portions may be provided between these locking portions 33 and 34. For example, the movable portion 32 can be slid and held in stages, and the antenna length of the helical antenna element 30 can be set to a desired length.

In this embodiment, one end of the helical antenna element 30 is fixed to the projecting portion 7 of the rotating means 9, but the fixed portion 38 side is defined as the projecting portion 7 as shown in FIG. 3, for example. If the helical antenna element 30 is configured to be detachable and the helical antenna element 30 is fixed to the antenna mounting portion, the helical antenna element 30 will be inside the portable wireless device housing 1 when the antenna housing portion is mounted on the protruding portion 7. It is electrically connected to the transmission / reception circuit 3 (not shown) provided in the above and is detachable from the projecting portion 7.

Next, the operation of the portable radio antenna shown in FIG. 11 will be described. In the portable wireless device antenna described in the present embodiment, the antenna housing portion 36 in which the helical antenna element 30 is housed is notched in the portable wireless device housing 1 as described in the above embodiment when waiting for communication or during a call. The helical antenna element 30 is attached to the portion 6, and the central axis of the helical antenna element 30 is arranged in substantially the same direction as the magnetic field component direction of the incoming wave 17, and the helical antenna element 30 operates as an antenna for magnetic field detection, and the magnetic field component of the incoming wave 17 is 22 is detected.
In addition, as shown in FIG. 11A, the other end of the antenna housing portion 36 is detached from the notch portion 6 during a call, and the helical antenna element 30 operates as an antenna for electric field detection, and the electric field component 23 of the incoming wave 17 is generated. To detect.

Further, the portable wireless device according to the present embodiment can further prevent the blocking effect of the head of the user 15 during a call, and can increase the antenna gain to realize more reliable transmission and reception. Become. That is, during a call, the movable portion 32 of the antenna housing portion 36 is slid in the direction of arrow F from the state shown in FIG.
When the portable wireless device according to the present embodiment is used in the state as shown in FIG. 1 (b), the antenna length L of the helical antenna element 30 is extended to L ′ and the effective length of the antenna is increased. This is because the tip portion of the helical antenna element 30 can protrude upward from the head of the user 15 even when a call is made by the portable wireless device described in this embodiment.

Example. 3 Next, another embodiment of the present invention will be described. In the above-mentioned embodiment, the antenna housing portion 36 of the portable wireless device is slid to extend the helical antenna element 30 housed therein during a call. The antenna gain is increased without being affected by blocking by the head of the user 15, and more reliable transmission / reception can be realized. However, in general, the resonance frequency of an antenna changes as its electrical length changes. For example, if the helical antenna element 30 is configured to resonate in either the contracted state or the extended state in the above embodiment, the other In this case, the resonance frequency may be shifted, and the characteristic may be deteriorated such as the directivity being broken, which is inconvenient in use. Although the helical antenna element itself is expanded and contracted in the embodiment described above, the impedance of the helical antenna element 4 is low with respect to the transceiver circuit provided inside the portable radio, and impedance matching with this transceiver circuit is performed. It is difficult to remove. Therefore, in the present embodiment, a portable wireless device antenna will be described in which characteristic deterioration is unlikely to occur even if the electrical length of the antenna changes, and impedance matching can be easily achieved.

In FIG. 12 (a) or FIG. 12 (b),
Reference numeral 37 denotes a cylindrical linear antenna housing formed of a dielectric resin, 38 denotes a helical antenna element wound around the linear antenna housing 37, and 39 has the linear antenna housing 37 provided therein. For example, as shown in FIG. 1, the antenna housing portion 40, which is fixed to the projecting portion 7 of the rotating means 9, is provided so as to be housed inside the linear antenna housing portion 37. When it is housed in 37, it is electrically insulated from the helical antenna element 38, and when it is pulled out from the linear antenna housing section 37, one end thereof is electrically connected to the antenna connection section 41 of the helical antenna element 37. The antenna element 42 is provided at the tip of the linear antenna element 40, and when the linear antenna element 40 is housed in the linear antenna housing portion 37, the antenna contact is made. A lock portion to be fitted with the parts 41. Also, in this embodiment, as in the case of the above-described second embodiment, the helical antenna element 32 has a configuration in which it is directly connected to the feeding portion 10 of the protruding portion 7. Thus, by providing the linear antenna element 40 so that it can be housed inside the helical antenna element 38, impedance matching with the transmission / reception circuit can be achieved.

Next, the operation of the portable radio antenna shown in FIG. 12 will be described. The portable wireless device antenna described in this embodiment has a resonance characteristic as shown in FIG. 13, and operates as a dual frequency antenna in the state shown in FIG. 12A during a communication call. At this time, the high resonance frequency side depends on the resonance frequency of the helical antenna element 38. Note that FIG.
In the figure, the horizontal axis represents the resonance frequency of the helical antenna element 38 and the linear antenna element 40, and the vertical axis represents the reflection loss of the helical antenna element 38 and the linear antenna element 40 at this resonance frequency. Further, when waiting for communication or during a call, the helical antenna element 38 operates as an antenna for magnetic field detection to detect the magnetic field component 22 of the incoming wave 17 as in the above-described embodiment, and at the time of a call, the helical antenna element 38 detects the magnetic field component 22.
As shown in FIG. 12A or FIG. 12B, the antenna housing portion 3
The other end of 6 separates from the notch 6 to operate the helical antenna element 38 as an antenna for electric field detection. In this case, the linear antenna element 40 is pulled out, as shown in FIG. When used in the state,
The linear antenna element 40 includes a helical antenna element 38.
Electric power is supplied from a transmission / reception circuit (not shown) through the antenna connection portion 41 of the above, and it becomes an antenna for electric field detection that operates at the same resonance frequency as when the linear antenna element 40 is housed.

In the portable radio device antenna having such a structure, the impedance of the antenna portion can be easily changed by pulling out the linear antenna element 40, so that the impedance matching between the antenna portion and the transmission / reception circuit can be obtained. The reflection loss can be reduced. Further, when the linear antenna element 40 is pulled out, the antenna gain is increased without being affected by the blocking by the head of the user 15, and more reliable transmission / reception can be realized.

[0045]

As described above, according to the first aspect of the invention, since the helical antenna element is rotated in the horizontal direction or the vertical direction by the rotating means, it is used as an antenna for magnetic field detection during standby. Each of the antennas operates as an electric field detecting antenna during a call, and an incoming call can be reliably detected during standby, and the call can be continued without being affected by the blocking of the user's head during a call.

According to the second aspect of the invention, the antenna housing portion is fixed to the rotatable protrusion of the rotating means supported on the upper portion of the portable wireless device housing, and the antenna housing portion is horizontally or Since it is rotated in the vertical direction, the helical antenna element is rotated so that the central axis of the antenna is surely in the horizontal direction or the vertical direction. By being arranged, it becomes easy to detect an incoming call.

According to the third aspect of the present invention, the movable portion of the antenna housing portion, to which the other end of the helical antenna element is fixed, expands and contracts with respect to the fixed portion of the antenna housing portion, to which one end of the helical antenna element is fixed. However, it is possible to reliably detect an incoming call during standby, and to reliably continue a call during a call without being affected by the blocking of the user's head.

According to the fourth aspect of the invention, a linear antenna element that can be housed inside the helical antenna element is provided, and this linear antenna element is housed inside the helical antenna element. The linear antenna element and the helical antenna element are electrically insulated from each other, and when the helical antenna element is pulled out from the inside, the linear antenna element and the helical antenna element are electrically connected to each other. Even if the antenna element is pulled out, the resonance frequency does not change, and it is possible to configure an antenna that is less likely to cause characteristic deterioration.By pulling out the linear antenna element, impedance matching between the antenna part and the transmission / reception circuit inside the portable wireless device In addition to being easy to obtain, the tip of this linear antenna element protrudes beyond the user's head, Impact of Kkingu is less likely to receive.

According to the fifth aspect of the invention, since the antenna housing portion is attached to the notch portion provided in the upper portion of the portable wireless device housing, the portability during standby is improved and the standby time is improved. Incoming calls can be detected easily.

According to the sixth aspect of the present invention, an upper cutout portion is provided on the rear side of the portable wireless device housing and is fixed to the rotatable projection of the rotating means supported by the cutout portion. The antenna storage part is rotated horizontally or vertically, and the antenna storage part is attached to the cutout part provided on the upper part of the rear side of the portable wireless device case during standby, so that the portability and antenna during standby are set. The gain is excellent, the incoming call can be detected easily and reliably during standby, and the call can be continued without being affected by the blocking of the head of the user even during the call.

[Brief description of drawings]

FIG. 1 is a rear perspective view showing the configuration of a portable wireless device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of the portable wireless device shown in FIG. 1 which is an embodiment of the present invention.

FIG. 3 is a configuration diagram showing an antenna housing portion according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a use state and an antenna characteristic of the portable wireless device in a standby state according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a configuration of vertical polarization used in an embodiment of the present invention.

FIG. 6 is a radiation characteristic diagram showing a radiation characteristic of the helical antenna element according to the embodiment of the present invention.

FIG. 7 is an antenna characteristic diagram showing an antenna characteristic of the helical antenna element according to the embodiment of the present invention during standby.

FIG. 8 is an explanatory view of an arrangement state of a helical antenna element showing an embodiment of the present invention.

FIG. 9 is an explanatory view showing a conventional portable wireless device antenna for explaining one embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a relationship between a waveform diagram of polarized waves used in an embodiment of the present invention and a peripheral length of a helical antenna element.

FIG. 11 is a rear view showing the configuration of a portable wireless device according to another embodiment of the present invention.

FIG. 12 is a rear view showing the configuration of a portable wireless device according to another embodiment of the present invention.

FIG. 13 is an explanatory diagram showing resonance characteristics of a portable wireless device antenna according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable radio | wireless machine housing 3 Transmitting / receiving circuit 4,30,38 Helical antenna element 5,36,39 Antenna storage part 6 Notch part 7 Protrusion part 9 Rotating means 31 Fixed part 32 Movable part 40 Linear antenna element

Claims (6)

[Claims] 1. A portable wireless device housing, a transmission / reception circuit housed in the portable wireless device housing, and an electrical connection to the transmission / reception circuit, which are rotatably supported by the portable wireless device housing. A rotating means having a protruding portion and a helical antenna element fixed to the protruding portion of the rotating means are provided, and by the rotating means, the helical antenna element is rotated in the horizontal direction during standby to detect a magnetic field. A portable wireless device antenna, wherein the helical antenna element is vertically rotated during a telephone call to operate as an antenna for electric field detection. 2. A portable wireless device housing, a transmitting / receiving circuit housed in the portable wireless device housing, and a rotation electrically connected to the transmitting / receiving circuit and supported on an upper portion of the portable wireless device housing. Rotating means having a free protruding portion, an antenna housing portion fixed to the protruding portion of the rotating means, an antenna housing portion provided inside the antenna housing portion, and electrically connected to the transmitting / receiving circuit via the protruding portion. And a helical antenna element connected to the helical antenna element, and by rotating the antenna housing portion, the helical antenna element is horizontally rotated during standby to serve as an antenna for magnetic field detection, and the helical antenna element is vertically aligned during a call. A portable wireless device antenna characterized by being rotated in a direction to operate as an antenna for electric field detection. 3. The antenna accommodating portion has a fixed portion fixed to the rotating means and a movable portion slidable with respect to the fixed portion, and one end of the helical antenna element is attached to the rotating means. The portable wireless device antenna according to claim 2, wherein the other end is fixed to the movable part while being fixed to the protruding part. 4. A portable wireless device housing, a transmission / reception circuit housed in the portable wireless device housing, and a rotatable unit electrically connected to the transmission / reception circuit and supported by the portable wireless device housing. Rotating means having a protruding portion, an antenna housing portion fixed to the protruding portion of the rotating means, a helical antenna element housed in the antenna housing portion and electrically connected to the protruding portion, A helical antenna element is provided so as to be accommodated inside, and is electrically insulated from the helical antenna element when accommodated, and has a linear antenna element which is electrically connected to the helical antenna element when pulled out. A portable wireless device antenna characterized by the above. 5. A notch portion is provided on an upper portion of the portable wireless device housing, and the antenna housing portion is attached to the notch portion. The portable wireless device antenna according to the item. 6. A portable wireless device housing having a notch portion provided in an upper portion on the back side for accommodating a transmitting / receiving circuit, and the disconnecting portion of the portable wireless device housing electrically connected to the transmitting / receiving circuit. Rotating means in which a rotatable protrusion is supported by the notch, an antenna housing fixed to the protrusion of the rotating means and attached to the notch, and housed in the antenna housing. A helical antenna element electrically connected to the projecting portion, and the helical antenna element for magnetic field detection when the antenna housing portion is mounted in the cutout portion by rotating the antenna housing portion. A portable wireless device antenna, wherein the helical antenna element operates as an electric field detecting antenna when the antenna is detached from the cutout portion.