JP2006041689A - Foldable mobile wireless apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foldable mobile wireless apparatus capable of obtaining high antenna performance by simply opening and expanding the casings at the time of speech. <P>SOLUTION: In the foldable mobile wireless apparatus wherein one ends of an upper casing 100 and a lower casing 101 in the longitudinal direction are connected freely turnably via a hinge 102 and which can be used in an opened and expanded state at the time of the speech, a parasitic element 111 with an electric length of nearly a half wavelength capable of being electromagnetically coupled to an antenna element 109 provided to an end at the hinge side in the longitudinal direction of the lower casing 101 in the case of being expanded, is provided to an end at the hinge side in the longitudinal direction of the upper casing 100 so that a current intensively flows on the parasitic element 111. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a foldable portable wireless device in which one end of an upper housing and a lower housing is rotatably connected via a hinge portion.

  The foldable portable wireless device can be used in a folded state at the time of standby and in an unfolded state during a call by connecting one end of the upper housing and the lower housing via a hinge part so as to be freely rotatable. (For example, patent document 1). Hereinafter, in order to facilitate understanding of the present invention, an outline thereof will be described with reference to FIGS. FIG. 8 and FIG. 9 are a rear view and a side view for explaining an external configuration and the like of the conventional folding portable wireless device in the unfolded state.

  As shown in FIGS. 8 and 9, the lower end of the upper casing 800 and the upper end of the lower casing 801 are rotatably connected via a hinge portion 802, and the front sides of both casings are closed and folded. It can be opened and expanded. On the front side of the upper casing 800, a main display unit 803 is disposed near the center, and a receiver unit 804 is disposed on the upper end side. A sub display unit 805 is disposed near the center on the back side of the upper housing 800. These are connected to a circuit board (not shown).

  In the lower casing 801, a hinge portion 802 is provided so as to protrude on the upper front side, and the upper casing 800 is folded when the front side of the upper casing 800 and the front side of the lower casing 801 are closed and folded. The front side of 801 is closed and covered. In addition, a transmitter 807 is disposed on the lower surface of the built-in circuit board 806, and a wireless unit 808 and a power feeder 809 are disposed on the upper surface of the upper surface. One end of a helical antenna element 810 that protrudes from the upper end surface of the lower housing 801 is connected to the power feeding unit 809. Helical antenna element 810 has an electrical length of approximately a quarter wavelength.

  FIG. 10 is a diagram showing a radiation pattern of the helical antenna element 810. FIG. 10 shows an Eφ component 1001 and an Eθ component 1002 on the XZ plane in the orthogonal coordinates XYZ. As shown in FIG. 10, the Eφ component 1001 and the Eθ component 1002 have substantially the same size in both the X-axis direction and the Z-axis direction.

  Now, a call using the foldable portable radio device configured as described above is performed, for example, in the form shown in FIG. FIG. 11 is a diagram for explaining how the foldable portable wireless device is used in a call state. In FIG. 11, the lower case 801 of the folding portable wireless device that is opened and unfolded by the user 1100 is held in the right hand 1101, and the receiver 804 located on the upper end side of the upper case 800 is placed on the right ear. The state is shown.

  In the foldable portable wireless device in the opened and deployed state in this way, the back surface of the upper housing 800 is located in the vicinity of the helical antenna element 810 provided to protrude from the upper end surface of the lower housing 801. The helical antenna element 810 is electromagnetically coupled to a metal material in the upper housing 800, a flexible printed circuit board that connects the electronic components in the upper housing 800 and the electronic components in the lower housing 801, etc. At times, the antenna performance deteriorates due to the proximity of the human head 1102 and the hand 1101 to these.

Therefore, various solutions for the problem that the antenna performance deteriorates have been proposed (for example, Patent Documents 1 to 4). That is, Patent Document 1 discloses a mechanism that can change the angle of an antenna element in conjunction with the opening / closing operation of a folding portable wireless device. Further, Patent Document 2 discloses a configuration in which when an incoming call is received, pressing of an incoming call button is detected and the angle of the antenna element is inclined with respect to the main body. Patent Document 3 discloses a configuration in which a rod-shaped antenna element housed in a housing is pulled out and the tip of the rod-shaped antenna is moved away from a human body. Further, Patent Document 4 discloses a configuration in which a plate-like antenna unit having a parasitic element having a substantially half-wave electrical length housed on the rear surface of a housing is drawn out.
JP 2003-87375 A JP 2001-308995 A JP 2001-57585 A JP 2001-326513 A

  However, the techniques disclosed in Patent Document 1 and Patent Document 2 have a problem that an angle adjustment mechanism for an antenna element is newly required to ensure high antenna performance in a call state.

  Further, in the techniques disclosed in Patent Document 3 and Patent Document 4, there is a problem that the user himself / herself needs to pull out the rod-shaped antenna and the plate-shaped antenna unit in order to ensure high antenna performance in a call state. is there.

  In short, with a foldable portable radio device, the user simply opens the upper housing and unfolds the receiving unit when making a call without adding a special mechanism or asking the user for extra operations. Therefore, it is desired to develop an antenna having a desired performance without being affected by a user's temporal region, hand, or the like. Consider this point.

  In the usage mode shown in FIG. 11, the longitudinal direction of the foldable portable radio device, that is, the angle α between the Z-axis direction and the ground is about 30 °. It is known that the cross polarization power ratio is 4 to 9 dB, and the vertically polarized power of the incoming wave is 4 to 9 dB higher than the horizontally polarized power. This indicates that higher communication quality can be ensured when the main polarization of the antenna of the folding portable wireless device in the above-described call state is perpendicular to the ground.

  That is, as shown in FIG. 10, in the conventional antenna, the Eφ component 1001 and the Eθ component 1002 are approximately the same size in both the X-axis direction and the Z-axis direction. In order to improve the polarization component, it is necessary to develop an antenna having a radiation pattern in which the Eφ component in the Z-axis direction is larger than the Eθ component.

  The present invention has been made in view of the above points, and does not add a special mechanism or request an extra operation from the user. An object of the present invention is to provide a foldable portable wireless device including an antenna having high performance without receiving.

  In order to solve this problem, the present invention is a folding device in which the longitudinal ends of the upper housing and the lower housing are rotatably connected via a hinge portion so that they can be used in an open and unfolded state during a call. In a tatami-type portable radio device, when unfolded, a linear non-wire having an electrical length of approximately a half wavelength that enables electromagnetic coupling with an antenna element provided at an end of the lower casing on the hinge side in the longitudinal direction. A configuration is adopted in which a power feeding element is provided at an end portion on the hinge portion side in the longitudinal direction of the upper casing.

  According to this configuration, when the folding portable wireless device is opened and expanded for a call, the parasitic element located at a position away from the human head or hand is electromagnetically coupled to the antenna element, and the parasitic element Current concentrates. Therefore, electromagnetic coupling between the antenna element and the circuit board in the foldable portable wireless device is suppressed, so that high antenna performance can be ensured in a call state. Therefore, when making a call, the user simply needs to perform a normal operation of opening and expanding the upper casing and placing the earpiece on the ear.

  In the folding portable wireless device according to the present invention, in the above invention, the antenna element provided in the lower housing is a helical antenna element or a meander antenna element, and when unfolded, the parasitic element is The arrangement is such that the arrangement direction of the main part is arranged so as to be substantially parallel to the axial direction of the helical antenna element or the meander antenna element.

  According to this configuration, since the electromagnetic coupling between the parasitic element and the antenna element becomes stronger when opened and deployed, higher antenna performance can be ensured in a call state.

  In the foldable portable wireless device according to the present invention, in the above invention, the parasitic element includes a main element piece disposed along a short direction of the upper housing, and electric terminals on both ends of the main element piece. The sub-element pieces that are connected to each other and arranged toward one end in the longitudinal direction of the upper casing, and one of the sub-element pieces is provided in the lower casing when deployed. A configuration is adopted in which the element is electromagnetically coupled and the other of the sub-element pieces is an open end.

  According to this configuration, since the main polarization of the antenna element is perpendicular to the ground in a call state, high antenna performance can be obtained.

  In the folding portable wireless device according to the present invention, in the above-described invention, in the parasitic element, the sub main element pieces arranged on both ends of the main element piece are each formed in a meander shape. Take the configuration.

  According to this configuration, since the main polarization of the antenna element is perpendicular to the ground in a call state, high antenna performance can be obtained.

  In the foldable portable wireless device according to the present invention, in the above invention, the parasitic element is formed on the upper casing at one end side in the short direction of the upper casing corresponding to the antenna element provided in the lower casing. A configuration is adopted in which they are arranged linearly along the longitudinal direction.

  According to this configuration, since the parasitic element and the antenna element can be electromagnetically coupled when opened and deployed, high antenna performance can be obtained.

  In the foldable portable wireless device according to the present invention, in the above invention, the parasitic element is a main element piece arranged along a short direction of the upper housing and one end side of the main element piece. Thus, the antenna element provided in the lower housing and the sub-element piece disposed toward one end in the longitudinal direction of the upper housing on one end side corresponding to the antenna element are employed.

  According to this configuration, since the main polarization of the antenna element is perpendicular to the ground in a call state, high antenna performance can be obtained.

  In the foldable portable wireless device according to the present invention, in the above-described invention, the parasitic element is a method in which the parasitic element is attached to an inner surface or an outer surface of a resin case that is formed of a conductive thin film or a wire and constitutes the upper housing. A configuration is adopted in which the antenna element is disposed at a position close to the antenna element provided in the lower casing when it is unfolded on the back side of the upper casing.

  According to this configuration, since the parasitic element and the antenna element can be electromagnetically coupled when opened and deployed, high antenna performance can be obtained.

  In the foldable portable wireless device according to the present invention, in the above invention, the main element piece of the parasitic element is arranged so that a center position thereof is aligned with a center position in a short direction of the upper housing. Take.

  According to this configuration, since the vertical polarization component that is the main polarization in the call state is further improved, higher antenna performance can be ensured.

  According to the present invention, high antenna performance can be obtained by simply opening and deploying without adding a special mechanism or requesting an extra operation from the user. Therefore, when making a call, the user simply needs to perform a normal operation of opening and expanding the upper housing and placing the earpiece on the ear.

  The main point of the present invention is that the user simply opens and opens the upper housing and places the receiver in his / her ear when making a call without adding a special mechanism or requesting an extra operation from the user. To obtain an antenna for a foldable portable radio device that exhibits a desired performance without being affected by a user's temporal region or the like when a normal operation is performed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
1 and 2 are a rear view and a side view for explaining an external configuration and the like of the folding portable wireless device according to the first embodiment of the present invention in an unfolded state. As shown in FIGS. 1 and 2, the lower end of the upper casing 100 and the upper end of the lower casing 101 are pivotally connected via a hinge portion 102, and the front sides of both casings are closed and folded. It can be opened and expanded.

  On the front side of the upper casing 100, a main display unit 103 is disposed near the center, and a receiver unit 104 is disposed on the upper end side. In addition, on the back side of the upper housing 100, a sub display unit 105 is disposed near the center. These are connected to a circuit board (not shown).

  In the lower casing 101, a hinge portion 102 protrudes from the front upper side, and when the front side of the upper casing 100 and the front side of the lower casing 101 are closed and folded, the upper casing 100 is in the lower casing. The front side of 101 is closed and covered. A transmitter 107 is disposed on the lower surface of the built-in circuit board 106, and a wireless unit 108 and a power feeder 109 are disposed on the upper surface of the upper surface. One end of a helical antenna element 110 that protrudes from the upper end surface of the lower housing 101 is connected to the power feeding unit 109. The helical antenna element 110 has an electrical length of approximately a quarter wavelength.

  In the above configuration, a linear parasitic element 111 made of a conductive thin film, a wire, or the like and having an electric length of approximately half wavelength is attached to the inner surface or the outer surface of the resin case constituting the upper housing 100. The upper casing 100 is disposed in the vicinity of the hinge at the lower end on the back side, that is, on the surface close to the helical antenna element 110 on the back side of the upper casing 100 when opened and unfolded.

  The parasitic element 111 is a linear conductor element having a full length of approximately half wavelength (75 mm in free space) and a width of, for example, 2 mm, assuming that the used radio frequency is 2 GHz, for example. As a result, the physical length is shorter than 75 mm. Since the upper casing 100 generally has a width of about 40 mm to 50 mm, as shown in FIG. 1, the parasitic element 111 for 2 GHz is arranged in a U shape with a bent portion. It has become.

  FIG. 3 is a perspective view for explaining the configuration and arrangement of the parasitic element 111 included in the folding portable wireless device shown in FIG. The configuration and arrangement of the parasitic element 111 will be specifically described along FIG. 3 with reference to FIGS. 1 and 2.

  In FIG. 3, the conductor plate 301 existing inside the upper housing 100 is extracted and shown for explaining the antenna operation, instead of clearly showing the upper housing 100. The width of the conductor plate 301 is substantially equal to the width of the upper housing 100, but the conductor plate 301 and the parasitic element 111 are electrically insulated. That is, the parasitic element 111 is electrically insulated from the conductive material existing inside the upper housing 100.

  When the parasitic element 111 is formed in a U shape due to the relationship between the radio frequency to be used and the size in the width direction of the upper casing 100 as described above, the parasitic element 111 has a long main length corresponding to the width direction of the upper casing 100. The element piece 111b and subelement pieces 111a and 111c having substantially the same length formed by bending in the same direction at both ends of the main element piece 111b. The length of the main element piece 111b is substantially equal to the width of the upper housing 100, and the lengths of the sub element pieces 111a and 111c are about 10 mm to 20 mm, respectively.

  When the width direction of the foldable portable wireless device is the Y-axis direction, the thickness direction is the X-axis direction, and the longitudinal direction is the Z-axis direction, the parasitic element 111 folds the main element piece 111b at the center position. The sub-element pieces 111a and 111c are arranged so as to be substantially parallel to the Z-axis direction and to be substantially parallel to the Y-axis direction so as to coincide with the center position in the width direction of the portable radio (upper housing 100). In the illustrated example, the sub-element piece 111a is arranged on one end side in the Y-axis direction, and the sub-element piece 111c is arranged on the other end side in the Y-axis direction.

  At this time, the helical antenna element 110 disposed on one end side in the width direction of the lower housing 101 is formed by winding a conducting wire in a spiral shape, and the axial direction of this spiral is the Z-axis direction. In this case, the helical antenna element 110 is arranged substantially in parallel with the axial direction.

  Accordingly, when the upper casing 100 is opened and unfolded, the sub-element piece 111a is disposed at a position close to the helical antenna element 110. Therefore, the distance at that time is set to about 2 mm, for example, and electromagnetic coupling between the two is performed. Is to be realized. Note that the sub-element piece 111c disposed on the other end side in the Y-axis direction is an open end.

  Next, with reference to FIGS. 1-3, operation | movement of a foldable portable radio | wireless machine provided with the parasitic element 111 comprised and arrange | positioned as mentioned above is demonstrated.

  When the helical antenna 110 is excited from the power feeding unit 109 in a state where the upper casing 100 is opened and opened, the helical antenna element 110 and the sub-element piece 111a are electromagnetically coupled to each other, and are located away from the human head or the hand. Since the antenna current is excited and flows in the parasitic element 111 located in the center, the helical antenna 110, the conductive plate 301 in the upper housing 100, the electronic components in the upper housing 100, and the electrons in the lower housing 101 are used. Electromagnetic coupling with a flexible printed circuit board that connects components is suppressed.

  At this time, the electromagnetic coupling between the parasitic element 111 and the helical antenna element 110 increases as the distance between the sub-element piece 111a and the helical antenna element 110 decreases. Further, the direction of the current flowing through the helical antenna element 110 is the axial direction of the helical antenna element 110, that is, the Z-axis direction in consideration of far-field radiation characteristics. The electromagnetic coupling increases with increasing parallelism. Since the electrical length of the parasitic element 111 is a half wavelength, the peak position of the current in the parasitic element 111 exists at the central position of the parasitic element 111, that is, the central position of the main element piece 111b. Therefore, the main element piece 111b contributes most to radiation. When the folding portable wireless device is closed, the parasitic element 111 is separated from the helical antenna element 110 and thus does not contribute to radiation.

  Here, the antenna characteristic obtained by the folding portable radio shown in FIG. 1 by providing the parasitic element acting as described above will be described. 4 is a diagram showing a radiation pattern of an antenna element provided in the foldable portable radio shown in FIG.

  4 shows an Eφ component 401 and an Eθ component 402 on the XZ plane in the orthogonal coordinates XYZ, as in FIG. Compared to FIG. 10, in FIG. 4, the Eθ component 402 is generally small, the Eφ component 401 is generally large, and in particular, the Eφ component 401 in the Z direction is about 4 dB higher. The improvement of the Eφ component 401 in the Z direction means an improvement in the vertical polarization component with respect to the ground in the communication state in the usage mode shown in FIG. 11, so that high antenna performance can be obtained.

  In other words, the antenna performance can be improved by providing the parasitic element 111 that is electromagnetically coupled to the helical antenna element 110. At this time, since the main element piece 111b substantially parallel to the width direction of the upper casing 100 improves the Eφ component in the Z-axis direction, higher antenna performance can be ensured in a talking state.

  In addition to the forms shown in FIGS. 1 to 3, various forms can be adopted as the form of the parasitic element 111 as shown in FIG. 5, for example. FIG. 5 is a diagram illustrating a modification of the parasitic element that the foldable portable wireless device illustrated in FIG. 1 can include.

  That is, as shown in FIG. 5A, both U-shaped corners may be smoothly curved. As shown in FIG. 5B, the sub-element pieces arranged on both ends of the long main element piece may have a meander shape. As shown in FIG. 5 (c), the length of the sub-element piece that is electromagnetically coupled to the helical antenna element may be increased and the middle thereof may be bent in the Y-axis direction. Further, since the width of the parasitic element does not need to be constant, as shown in FIG. 5 (d), the ring-shaped metallic decorative portion is used as the center position of the long main element piece and has a narrow width from both sides. It is also possible to adopt a form in which the element pieces are pulled out and sub-element pieces are arranged at both ends.

  The antenna element is not limited to the helical antenna element 110, and may be, for example, a meander antenna element or a telescopic rod antenna element.

  As described above, according to the first embodiment, a linear parasitic element that can be electromagnetically coupled to the antenna element provided in the lower casing when the upper casing is opened and expanded is provided in the upper casing. Therefore, antenna performance can be improved in a call state. At this time, the parasitic element includes a main element piece arranged along the short direction (width direction) of the upper casing, and the center position thereof is made to coincide with the center position of the upper casing in the short direction. Therefore, the vertical polarization component with respect to the ground can be improved in a call state, and higher antenna performance can be ensured.

  Therefore, when making a call, the user can suppress the deterioration of sensitivity due to the influence of the temporal region and the hand by simply opening and opening the upper housing and performing a normal operation of placing the earpiece on the ear. .

(Embodiment 2)
FIG. 6 is a perspective view illustrating a configuration of a parasitic element included in the folding portable wireless device according to the second embodiment of the present invention. In FIG. 6, the same reference numerals are given to configurations that are the same as or equivalent to the configurations illustrated in FIG. 3. Here, the description will be focused on the portion related to the second embodiment.

  In FIG. 6, a parasitic element 600 included in the foldable portable wireless device according to the second embodiment is formed of a conductive thin film, a wire, or the like and has an electrical length of approximately a half wavelength, and configures the upper casing 100. In the method of affixing to the inner surface or the outer surface of the resin case, it is arranged near the hinge part at the lower end on the back side of the upper housing 100, that is, on the surface close to the helical antenna element 110 on the back side of the upper housing 100. 3 is the same as the parasitic element 111 shown in FIG. 3, but is different from the parasitic element 111 shown in FIG.

  That is, the parasitic element 600 included in the folding portable wireless device according to the second embodiment is arranged linearly along the longitudinal direction (Z-axis direction) of the upper housing 100. Assuming that the used radio frequency is 2 GHz, for example, a linear conductor element having an overall length of approximately half wavelength (75 mm in free space) and a width of 2 mm, for example.

  When the upper casing 100 is opened and unfolded, the hinge part side end of the parasitic element 600 is arranged at a position close to the helical antenna element 110, so the interval at that time is set to about 2 mm, for example. The point which implement | achieves the electromagnetic coupling between both is the same as that of Embodiment 1. FIG.

  Therefore, when the helical antenna element 110 is excited from the power feeding unit 109 in a state where the upper housing 100 is opened and unfolded, the helical antenna element 110 and the lower end portion of the parasitic element 600 are electromagnetically coupled to each other. Since the antenna current is excited and concentrated on the parasitic element 600 located away from the hand or the hand, the helical antenna 110, the conductor plate 301 in the upper casing 100, and the upper casing 100 are concentrated as in the first embodiment. Electromagnetic coupling with a flexible printed circuit board or the like that connects the internal electronic component and the electronic component in the lower housing 101 is suppressed. That is, high antenna performance can be ensured in a call state.

  As described above, according to the second embodiment, the upper casing is provided with the linear parasitic element that can be electromagnetically coupled to the antenna element provided in the lower casing when the upper casing is opened and expanded. Therefore, high antenna performance can be ensured.

  Therefore, when making a call, the user can suppress the deterioration of sensitivity due to the influence of the temporal region and the hand by simply opening and opening the upper housing and performing a normal operation of placing the earpiece on the ear. .

(Embodiment 3)
FIG. 7 is a perspective view illustrating the configuration of a parasitic element included in the folding portable wireless device according to the third embodiment of the present invention. In FIG. 7, the same reference numerals are given to configurations that are the same as or equivalent to the configurations illustrated in FIG. 3. Here, the description will be focused on the portion related to the third embodiment.

  In FIG. 7, a parasitic element 700 included in the foldable portable wireless device according to Embodiment 3 is formed of a conductive thin film, a wire, or the like, has an electrical length of approximately half a wavelength, and is built in the upper casing 100. The method is affixed to the inner surface or the outer surface of the resin case to be disposed in the vicinity of the hinge at the lower end on the back side of the upper housing 100, that is, on the surface close to the helical antenna element 110 on the back side of the upper housing 100. 3 is the same as the parasitic element 111 shown in FIG. 3, but is different from the parasitic element 111 shown in FIG.

  That is, the parasitic element 700 included in the folding portable wireless device according to the third embodiment is formed in a substantially L shape. Specifically, the sub-element piece 700a along the longitudinal direction (Z-axis direction) of the upper casing 100 on one end side where the helical antenna element 110 is arranged in the width direction (Y-axis direction) of the upper casing 100, The main element piece 700b is bent from the front end in the longitudinal direction of the sub-element piece 700a and extends along the width direction (Y-axis direction) of the upper casing 100. The center position of the main element piece 700b coincides with the center position of the upper casing 100 in the width direction (Y-axis direction).

  Also in the parasitic element 700 included in the folding portable wireless device according to the second embodiment, assuming that the used radio frequency is 2 GHz, for example, the total length is approximately half wavelength (75 mm in free space), and the width is 2 mm, for example. It becomes a linear conductor element.

  When the upper casing 100 is opened and unfolded, the sub-element piece 700a of the parasitic element 700 is disposed at a position close to the helical antenna element 110. Therefore, the interval at that time is set to about 2 mm, for example. The point which implement | achieves the electromagnetic coupling between is also the same as that of Embodiment 1. FIG.

  Therefore, when the helical antenna element 110 is excited from the power feeding portion 109 in a state where the upper casing 100 is opened and unfolded, the helical antenna element 110 and the sub-element piece 700a of the parasitic element 700 are electromagnetically coupled, and the human body side Since the antenna current is excited and concentrated on the parasitic element 700 located away from the head or hand, the helical antenna element 110, the conductor plate 301 in the upper housing 100, and the upper part are formed as in the first embodiment. Electromagnetic coupling between the electronic component in the housing 100 and the flexible printed circuit board that connects the electronic component in the lower housing 101 is suppressed. That is, high antenna performance can be ensured in a call state.

  As described above, according to the third embodiment, a linear parasitic element that can be electromagnetically coupled to the antenna element provided in the lower casing when the upper casing is opened and expanded is provided in the upper casing. Therefore, antenna performance can be improved in a call state. At this time, the parasitic element includes a main element piece arranged along the short direction (width direction) of the upper casing, and the center position thereof is made to coincide with the center position of the upper casing in the short direction. Therefore, the vertical polarization component with respect to the ground can be improved in a call state, and higher antenna performance can be ensured.

  Therefore, when making a call, the user can suppress the deterioration of sensitivity due to the influence of the temporal region and the hand by simply opening and opening the upper housing and performing a normal operation of placing the earpiece on the ear. .

  INDUSTRIAL APPLICABILITY The present invention is suitable as an antenna for a foldable portable wireless device that exhibits desired performance without being affected by the user's temporal region.

The rear view explaining the external appearance structure in the expansion | deployment state of the foldable portable radio | wireless machine which concerns on Embodiment 1 of this invention The side view explaining the external appearance structure in the expansion | deployment state of the foldable portable radio | wireless machine shown in FIG. The perspective view explaining the structure and arrangement | positioning of a parasitic element with which the foldable portable radio shown in FIG. 1 is provided. The figure which shows the radiation pattern of the antenna element with which the foldable portable radio shown in FIG. The figure which shows the modification of the parasitic element which the foldable portable radio | wireless machine shown in FIG. The perspective view explaining the structure of the parasitic element with which the foldable portable radio | wireless machine which concerns on Embodiment 2 of this invention is provided. The perspective view explaining the structure of the parasitic element with which the foldable portable radio | wireless machine which concerns on Embodiment 3 of this invention is provided. Rear view for explaining the external configuration of a conventional folding portable wireless device in a deployed state FIG. 8 is a side view showing an example of the configuration of the folding portable wireless device shown in FIG. The figure which shows the radiation pattern of the antenna element with which the foldable portable radio shown in FIG. The figure explaining the use aspect of a folding portable radio | wireless machine in a telephone call state

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Upper housing | casing 101 Lower housing | casing 102 Hinge part 103 Main display part 104 Reception part 105 Subdisplay part 106 Circuit board 107 Transmission part 108 Radio | wireless part 109 Feeding part 110 Helical antenna element 111,600,700 Parasitic element 111a, 111c , 700a Sub-element piece 111b, 700b Main element piece 301 Conductor plate

Claims (8)

  When deployed in a foldable portable wireless device, one end in the longitudinal direction of the upper and lower housings is pivotally connected via a hinge so that it can be used in an open and deployed state during a call. A linear parasitic element having a substantially half-wave electrical length capable of electromagnetic coupling with an antenna element provided at an end of the lower casing in the longitudinal direction is arranged in the longitudinal direction of the upper casing. A foldable portable wireless device provided at an end on the hinge portion side.   The antenna element provided in the lower housing is a helical antenna element or a meander antenna element, and when unfolded, the parasitic element is arranged such that the main part is arranged in the axial direction of the helical antenna element or the meander antenna element. The foldable portable wireless device according to claim 1, wherein the foldable portable wireless device is arranged so as to be substantially parallel to the foldable device.   The parasitic element is disposed toward the one end side in the longitudinal direction of the upper casing by being electrically connected to the main element piece disposed along the short side direction of the upper casing and both ends of the main element strip. The sub-element piece is electromagnetically coupled with the antenna element provided in the lower housing when the sub-element piece is unfolded, and the other of the sub-element pieces becomes an open end. The foldable portable wireless device according to claim 1 or 2, characterized in that   4. The foldable portable wireless device according to claim 3, wherein in the parasitic element, the sub main element pieces arranged on both ends of the main element piece are each formed in a meander shape.   The parasitic element is arranged in a straight line along the longitudinal direction of the upper casing on one end side in the lateral direction of the upper casing corresponding to the antenna element provided in the lower casing. The folding portable wireless device according to claim 1 or 2.   The parasitic element includes a main element piece arranged along a short direction of the upper housing, and an upper portion on one end side of the main element piece corresponding to the antenna element provided on the lower housing. The foldable portable wireless device according to claim 1 or 2, comprising a sub-element piece arranged toward one end side in the longitudinal direction of the housing.   The parasitic element is formed by a conductive thin film or wire and is attached to the inner or outer surface of a resin case constituting the upper casing. The foldable portable wireless device according to claim 1, wherein the foldable portable wireless device is disposed at a position close to the antenna element provided in the antenna.   The foldable portable radio according to claim 3 or 4, wherein the main element piece of the parasitic element is arranged so that a center position thereof is aligned with a center position in a short direction of the upper housing. Machine.

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