JP2006325152A - Portable radio communication terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain miniaturization with restrained degradation of an antenna characteristic when in use, and to obtain a good antenna characteristic even under a multipath fading environment. <P>SOLUTION: The portable radio communication terminal device includes a cabinet 2 in which a first cabinet 3 is combined with a second cabinet 4 via a hinge mechanism 5 in an arbitrarily expanding manner. To a conductor 7 and an antenna material 6 in the first cabinet 3, balanced power feed is performed from a radio transmission/reception circuit module 17 provided on the second cabinet 4, via a balanced and/or unbalanced conversion element 14, so as to configure a balanced antenna 8. The balanced and/or unbalanced conversion element 14 are connected to the radio transmission/reception circuit module 17 through a coaxial cable 13, and also, the first cabinet 3 and the second cabinet 4 are connected to the ground via the coaxial cable 13 independently of a signal line connection. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable wireless terminal device such as a cellular phone, and more specifically, is divided into at least a first casing and a second casing, and the first casing and the second casing can be unfolded by a hinge mechanism. The present invention relates to a portable wireless terminal device including a housing coupled to the.

  A portable wireless terminal device such as a cellular phone is provided with, for example, a rod antenna, a helical antenna, an inverted F antenna, or the like provided in a housing as an antenna for transmitting and receiving a high-frequency signal. These antennas are unbalanced antennas, and a good antenna characteristic is exhibited by having a large area ground. In a portable wireless terminal device, a ground is generally constituted by a casing ground plane, but the casing is enlarged to obtain a large ground. Further, since the portable wireless terminal device is used by holding the housing, there is a problem that the input impedance is greatly changed due to the influence of the human body and the antenna characteristics are deteriorated.

  Since the dipole antenna, which is a balanced antenna, can operate as an antenna without a ground, it is effective for reducing the size of the chassis ground plane and does not cause a large current to flow through the ground plane. This is effective for deterioration of antenna characteristics. Patent Document 1 discloses an antenna device configured to suppress a current flowing in a ground plane and reduce deterioration of antenna characteristics due to the influence of a human body by performing balanced power feeding to a pair of helical antenna elements built in a portable wireless device. Is disclosed.

  Further, in Patent Document 2, a first dielectric casing provided with a first conductor plate and a second dielectric casing provided with a second conductor plate are configured to be foldable, and the first conductor plate and There has been disclosed a portable wireless device in which a dipole antenna is configured by balanced feeding of a high frequency voltage to a two-conductor plate. Since portable radio devices do not require a separate antenna element other than the housing, the size can be reduced, and the bandwidth characteristics can be broadened by the characteristics of the dipole antenna whose bandwidth characteristics are expanded by the thickness and width of the elements. Become.

JP 2001-156517 A JP 2004-208219 A

  In the antenna device disclosed in Patent Document 1 described above, a pair of helical antenna elements are installed with an antenna axis set in a direction parallel to the ground plane and with a sufficiently small interval compared to the wavelength. The antenna device has a feature that good antenna characteristics are maintained even when applied to a portable wireless device used by holding a casing. However, in such an antenna device, since the antenna element generally requires a length that is at least twice that of a quarter wavelength antenna, it is difficult to apply it to a portable wireless device that is required to be downsized. There is a problem.

  The antenna device disclosed in Patent Document 2 described above can be applied as it is to, for example, a foldable housing employed as a general housing structure of a mobile phone, and can be reduced in size by eliminating the need for an antenna element. To make it easier. However, since such an antenna device is often used by gripping the second casing that constitutes the antenna element, it directly grips the radiating portion, and thus there is a problem that the antenna characteristics are deteriorated due to the influence of the human body. is there.

  In a portable wireless terminal device such as a mobile phone, an antenna device is required that maintains good antenna characteristics even when the user grips the casing and the head is close to the usage. In addition, in the portable radio terminal device, an antenna device that realizes good antenna characteristics in a multipath fading environment that realizes miniaturization and various polarizations is required.

  Therefore, the present invention provides a portable wireless terminal device that can be reduced in size by suppressing deterioration of antenna characteristics even when in use, and obtains good antenna characteristics by changing antenna polarization even in a multipath fading environment. The purpose is to provide.

  The portable wireless terminal device according to the present invention that achieves the above-described object is divided into at least a first casing and a second casing, and the first casing and the second casing are deployed via a hinge mechanism. A housing that is freely coupled is provided. In the portable wireless terminal device, the first antenna element is configured by the conductor portion of the first casing, and the second antenna element is configured by the antenna member that is supported so as to be expandable with respect to the first casing. A balanced antenna is configured by performing balanced power feeding via a balanced / unbalanced conversion element from a wireless transmission / reception circuit unit provided on the second housing side with respect to one antenna element and a second antenna element. The portable wireless terminal device uses a coaxial cable as a power supply line between the balanced / unbalanced conversion element provided on the first housing side and the wireless transmission / reception circuit unit provided on the second housing side, and the first through the coaxial cable. The circuit unit on the first housing side and the circuit unit on the second housing side are connected to the ground independently of the signal line connection.

  The portable wireless terminal device uses, for example, a meander-type or helical-type monopole antenna as an antenna member, and a second casing provided with a hinge mechanism with respect to the first casing. It is located on the side facing the coupling part with the second housing or provided on the part located on the coupling part side with the second housing provided with the hinge mechanism. The portable wireless terminal device is provided in such a manner that the antenna member is held at an appropriately expanded angle with respect to the first housing.

  In a portable wireless terminal device, a dipole antenna is mounted by performing balanced feeding via a balanced / unbalanced converter from a wireless transmission / reception circuit unit provided on the second housing side with respect to the first antenna element and the second antenna element. Constitute. In a portable wireless terminal device, a high frequency attributed to an antenna is obtained by using a coaxial cable as a line connecting a power supply to each antenna element and a ground between the circuit unit on the first housing side and the circuit unit on the second housing side. Only the balanced power supply type does not leak to the second housing ground, and the first housing and the second housing can be connected at a high frequency. In the portable wireless terminal device, the high frequency current excited by the received radio wave received by each antenna element is prevented from flowing from the first housing to the second housing, and the first housing and the second housing Control signals and various information signals are exchanged between the two.

  In the portable wireless terminal device, the second antenna element is configured by an antenna member that is supported so as to be expandable with respect to the first housing, and thus the antenna member is appropriately expanded to be various depending on the first antenna element. A dipole antenna of a different form is configured. Therefore, in the portable wireless terminal device, good antenna characteristics can be obtained by changing the antenna polarization even in a multipath fading environment in which vertical polarization and horizontal polarization are mixed.

  According to the portable wireless terminal device of the present invention, a balanced antenna is formed by the first casing and the antenna member, thereby achieving a reduction in size equivalent to a 1 / 4λ (wavelength) antenna. According to the portable wireless terminal device, the signal received by the antenna by the user with respect to the first casing is used by gripping the second casing that is isolated in high frequency. The influence of the gripping human body is blocked, and the deterioration of the antenna characteristics is suppressed, so that favorable wireless communication can be performed. Also, according to the portable wireless terminal device, it is possible to obtain good antenna characteristics even in a multipath fading environment by configuring various forms of dipole antennas.

  Hereinafter, a mobile phone 1 shown in the drawings as an embodiment of the present invention will be described in detail. As shown in FIGS. 1 and 2, the cellular phone 1 is divided into a first case 3 and a second case 4 in which the case 2 is formed of a dielectric material, and is combined in a freely deployable manner via a hinge mechanism 5. Configured. The cellular phone 1 has a state in which the second housing 4 is folded with respect to the first housing 3 via the hinge mechanism 5 and is unfolded in the length direction as shown in FIGS. 3 and 4. As shown in FIG. 6, it is used by being developed in an orthogonal state.

  The mobile phone 1 is provided with a rod antenna 6 on one end of the mobile phone 1 that is supported on the side of the first housing 3 so as to be unfoldable. As will be described in detail later, the mobile phone 1 is a dipole antenna (balanced type) configured by performing balanced feeding from the second housing 4 side to the rod antenna 6 and the conductor portion 7 provided in the first housing 3. Antenna) 8. In the mobile phone 1, the dipole antenna 8 is configured to have a size equivalent to that of a ¼λ antenna provided in a general mobile phone, and is used by holding the second housing 4 as a handheld portion.

  In the first housing 3, a liquid crystal display 9 is disposed at a substantially central portion of the first main surface, and a speaker 10 is disposed in the vicinity of the other end in the longitudinal direction facing the hinge mechanism 5. Has been. The first housing 3 incorporates a first circuit board 11 on which the liquid crystal display 9 and the speaker 10 are mounted and these drive circuit units (not shown) are provided. The first circuit board 11 may be formed with a vertically long rectangular ground pattern having a large area on the second main surface side, and the above-described conductor portion 7 may be configured by this ground pattern.

  The first housing 3 is provided with a high-frequency power supply unit 12 that balances and supplies a high-frequency voltage to the conductor unit 7 and the rod antenna 6 on the first circuit board 11. A high frequency voltage is supplied to the high frequency power supply unit 12 from the second housing 4 side via a coaxial cable 13 of an unbalanced line. As shown in FIG. 2, the high frequency power supply unit 12 is connected to one end portion of the conductor portion 7 in the longitudinal direction and is connected to one end portion of the opposing rod antenna 6, and supplies a high frequency voltage to each of them in a balanced manner. The first casing 3 is provided with a balanced / unbalanced conversion element 14 such as a balun on the first circuit board 11 in order to match the balanced system and the unbalanced system. Needless to say, the first housing 3 may be provided with an imaging unit of a CCD camera, for example.

  The second housing 4 is provided with 10 keys, various function keys, a jog dial, or the like appropriately arranged on the first main surface side to constitute an operation unit 15. As shown in FIG. 2, the second casing 4 includes a second circuit board 16 which is not shown in detail, and the second circuit board 16 includes a radio transmission / reception circuit module 17 and a control circuit unit not shown. An LSI element, an IC element, various electronic components, a semiconductor memory, and the like constituting a dial transmission circuit module, a power supply circuit, and the like are mounted.

  In the second housing 4, a microphone 18 mounted on the second circuit board 16 is disposed in the vicinity of the other end in the longitudinal direction facing the hinge mechanism 5. The second housing 4 includes a rechargeable secondary battery (not shown). In the second housing 4, an external connection connector mounted on or connected to the second circuit board 16 and a charging terminal for the secondary battery are built in and located on the end side where the microphone 18 is disposed.

  The rod antenna 6 is located in the vicinity of the other end in the longitudinal direction facing the hinge mechanism 5 with respect to the first housing 3, and the base end portion is rotatably supported by the support portion 19. The rod antenna 6 has a predetermined length, and is composed of an antenna element 20 and a covering 21 formed by a dielectric resin that covers the antenna element 20. The antenna element 20 is made of, for example, a meander type or helical type conductive element. As described above, a high frequency voltage is applied to the rod antenna 6 from the high frequency power supply unit 12 to the base end portion of the antenna element 20 facing the conductor portion 7.

  Although not described in detail, the support portion 19 has a rotation support shaft, a click mechanism, and the like provided in the first housing 3, and rotatably supports a bearing portion provided at the base end portion of the rod antenna 6. . The mobile phone 1 is portable so that the rod antenna 6 is held in the storage recess (not shown) provided on the back side of the first housing 3 by the support portion 19 in the unused state. So that there is no problem. The support unit 19 protrudes from the first housing 3 so that the rod antenna 6 is rotated to the side as shown by an arrow in FIG. 1 when the mobile phone 1 is used. The support part 19 holds the rod antenna 6 at an arbitrary rotation position with respect to the support part 19 by a click mechanism.

  The cellular phone 1 is electrically connected to the first circuit board 11 on the first housing 3 side and the second circuit board 16 on the second housing 4 side described above by the flexible circuit board 22 provided across the hinge mechanism 5. A connection is made. The flexible circuit board 22 is configured such that a power source, a control signal, an audio signal, or the like is supplied from the first housing 3 side to each unit on the second housing 4 side. The flexible circuit board 22 is not provided with a pattern for performing ground connection between the first circuit board 11 and the second circuit board 16 unlike the flexible circuit board provided in the conventional mobile phone. Therefore, the flexible circuit board 22 constitutes the mobile phone 1 having a structure in which the first housing 3 and the second housing 4 are separated from the ground at a transmission site for a power source and signals.

  In the mobile phone 1, the first circuit board 11 on the first housing 3 side and the second circuit board 16 on the second housing 4 side connect the coaxial cable 13 that performs balanced power feeding to the dipole antenna 8 described above. The ground connection is made using it. As is well known, the coaxial cable 13 is used as a high-frequency signal transmission cable. As shown in the enlarged view of FIG. 2, the central conductor 23, an annular outer peripheral conductor 24 passing through the central conductor 23, these It consists of an insulator 25 that insulates between the central conductor 23 and the outer peripheral conductor 24 and a covering 26 that covers the whole. The coaxial cable 13 has a characteristic that high-frequency current hardly flows through the outer conductor 24.

  In the mobile phone 1, as described above, the coaxial cable 13 is used as a feed line, and a high-frequency voltage is applied to the dipole antenna 8 configured on the first housing 3 side from the radio transmission / reception circuit module 17 on the second housing 4 side. Power is supplied. In the mobile phone 1, the ground connection of the feeder line is performed by the outer peripheral conductor 24 of the coaxial cable 13. In the mobile phone 1, the current is excited by the radio wave received by the dipole antenna 8, but this current is hardly generated in the outer conductor 24 of the coaxial cable 13 because of the dipole structure.

  In the mobile phone 1, a large current flow due to the received radio wave is suppressed to the second housing 4 side via the coaxial cable 13 by the dipole structure in which the high-frequency current is not easily excited by the antenna on the outer peripheral conductor 24 described above. Therefore, in the mobile phone 1, the first housing 3 side and the second housing 4 side are separated in high frequency while realizing a state in which a direct current and an alternating current ground are connected via the coaxial cable 13. It becomes composition. In the mobile phone 1, the second housing 4 is gripped and used, but the deterioration of the reception characteristics of the antenna is reduced by suppressing the flow of the excitation current due to the received radio wave to the second housing 4 side. The Further, in the mobile phone 1, since the dipole antenna 8 does not cover the radiating portion with the user's hand, the deterioration of the radiation characteristics of the antenna is reduced.

  In the mobile phone 1, as described above, the first housing 3 is combined with the second housing 4 via the hinge mechanism 5 so as to be unfoldable, and the rod antenna 6 is supported by the first housing 3. Since they are combined in a freely deployable manner via 19, various forms of dipole antenna 8 can be configured. The mobile phone 1 is deployed so that the first housing 3 is positioned on a straight line with respect to the second housing 4 and the rod antenna 6 is also deployed in a vertical direction with respect to the first housing 3 on the same straight line. By being positioned in the vertical direction, the first housing 3 and the rod antenna 6 form a vertical linear dipole. In the mobile phone 1, the second housing 4 is gripped and used, so that the dipole antenna 8 is located away from the head and at a high position, so that transmission / reception characteristics are improved.

  As shown in FIG. 3, the cellular phone 1 is unfolded via the support portion 19 in a state where the first housing 3 is linearly positioned with respect to the second housing 4 via the hinge mechanism 5. It is also possible to use the rod antenna 6 in a form in which the rod antenna 6 is horizontally expanded with respect to one housing 3. In the mobile phone 1, an L-shaped dipole is configured by the first housing 3 and the rod antenna 6 in such a usage pattern.

  As shown in FIG. 4, the cellular phone 1 is unfolded via the support portion 19 in a state where the first housing 3 is linearly positioned with respect to the second housing 4 via the hinge mechanism 5. It is also possible to use the rod antenna 6 in a form in which a predetermined angle is given to the side with respect to one housing 3. In the mobile phone 1, a V-shaped dipole is configured by the first housing 3 and the rod antenna 6 in this usage pattern.

  In the mobile phone 1, as described above, the dipole antenna 8 having various forms is configured, so that the mobile phone 1 can be used in a multipath fading environment (mobile transmission / reception environment) in an urban area where vertical polarization and horizontal polarization are mixed. It is possible to change the polarization characteristics of the antenna. Therefore, the mobile phone 1 can perform transmission / reception in a good state.

  In the cellular phone 1, the casing 2 is wide enough to be gripped, and the liquid crystal display 9 is provided in the first casing 3 in a state of a vertically long screen in order to realize a large screen. In the mobile phone 1, as shown in FIGS. 5 to 7, the first housing 3 is deployed in a horizontal state orthogonal to the second housing 4 via the hinge mechanism 5, thereby It is also possible to use the liquid crystal display 9 provided on the side 3 as a horizontally long form.

  For example, the mobile phone 1 has a function of receiving a broadcast program of terrestrial digital broadcasting (ISDB-T: Integrated Services Digital Broadcasting-Terrestrial) for mobile terminals, and a function of receiving image content such as other moving images or still images. . In the mobile phone 1, since these terminal screens are generally used as landscape screens, the liquid crystal can be obtained by developing the first housing 3 in a horizontal state orthogonal to the second housing 4 as described above. By making the display 9 a horizontally long screen, it is possible to display video and images without causing a sense of incongruity.

  In the mobile phone 1, as shown in FIG. 5, the first housing 3 is expanded in a horizontal state orthogonal to the second housing 4 via the hinge mechanism 5, and the first housing is supported via the support portion 19. The rod antenna 6 can be deployed in parallel with the body 3 and used. In the mobile phone 1, a linear dipole is constituted by the first housing 3 and the rod antenna 6 in such a usage pattern.

  Further, in the mobile phone 1, as shown in FIG. 6, the first housing 3 is expanded in a horizontal state orthogonal to the second housing 4 via the hinge mechanism 5, and the first housing 3 is interposed via the support portion 19. The rod antenna 6 can be deployed and used so as to stand at a right angle with respect to one housing 3. In the mobile phone 1, an L-shaped dipole is configured by the first housing 3 and the rod antenna 6 in such a usage pattern.

  Furthermore, in the mobile phone 1, as shown in FIG. 7, the first housing 3 is expanded in a horizontal state orthogonal to the second housing 4 via the hinge mechanism 5, and the first housing 3 is interposed via the support portion 19. It is possible to use the rod antenna 6 by expanding the rod antenna 6 at an angle with respect to one housing 3. In the mobile phone 1, a V-shaped dipole is configured by the first housing 3 and the rod antenna 6 in this usage pattern.

  In the mobile phone 1, as described above, the first casing 3 constituting the first antenna element of the dipole antenna 8 is used in a horizontal state so that the first casing 3 has horizontal polarization characteristics. become. In the mobile phone 1, when receiving a terrestrial digital broadcast of horizontal polarization broadcast, the dipole antenna 8 has a horizontal polarization characteristic, so that it is possible to receive broadcast radio waves with higher sensitivity.

  In the mobile phone 1, as described above, the main second circuit board 16 is built in the second housing 4, and a control circuit unit, a dial transmission circuit module, a power supply circuit, and the like are mounted on the second circuit board 16. Is done. In the mobile phone 1, a wireless transmission / reception circuit module 17 is mounted on the second circuit board 16 in order to perform signal processing while suppressing loss and the like. In the mobile phone 1, the radio transmission / reception circuit module 17 processes radio waves received by the dipole antenna 8 and transmission information. In the mobile phone 1, the high frequency power supply unit 12 on the first housing 3 side and the wireless transmission / reception circuit module 17 on the second housing 4 side are connected by a coaxial cable 13.

  In the mobile phone 1, the rod antenna 6 is combined in a freely deployable manner via the support portion 19 provided in the vicinity of the distal end portion of the first housing 3 as described above. For this purpose, the cellular phone 1 has a structure in which the coaxial cable 13 is drawn over the entire length of the first housing 3 and pulled out to the second housing 4 side. In the mobile phone 1, the liquid crystal display 9 is incorporated as a large component in the first housing 3, but a space for the coaxial cable 13 can be secured.

  However, in the mobile phone 1, for example, a space for the first housing 3 is difficult to be secured due to the multi-functionality equipped with, for example, a camera function. Further, in the mobile phone 1, the line loss increases due to the increase in the distance between the high-frequency power supply unit 12 and the radio transmission / reception circuit module 17. In the mobile phone 1, the use of the coaxial cable 13 suppresses noise superimposition, but it is preferable to shorten the line length.

  The mobile phone 30 shown in FIGS. 8 to 12 as the second embodiment is provided with a support portion 19 that supports the rod antenna 6 so as to be positioned on the hinge mechanism 5 side of the first housing 3. The interval between the unit 12 and the wireless transmission / reception circuit module 17 is shortened. Since the mobile phone 30 has the same configuration as that of the mobile phone 1 described above except that the support position of the rod antenna 6 with respect to the first housing 3 is different, the same reference numerals are given to corresponding portions. Is omitted.

  Also in the cellular phone 30, balanced power is supplied from the high frequency power supply unit 12 to the rod antenna 6 and the conductor unit 7. One end of the high frequency power supply unit 12 is connected to the second housing via the balanced / unbalanced conversion element 14. The other end of the coaxial cable 13 connected to the four-side radio transceiver circuit module 17 is connected. In the mobile phone 30, the coaxial cable 13 can be shortened by providing the high-frequency power supply unit 12 also on the hinge mechanism 5 side in the first housing 3.

  Also in such a cellular phone 30, the first housing 3 is combined with the second housing 4 via the hinge mechanism 5 so as to be freely deployable, and the rod antenna 6 supports the support portion 19 with respect to the first housing 3. Therefore, the dipole antenna 8 can be configured in various forms. In the mobile phone 30, as shown in FIG. 8, the first housing 3 is unfolded so as to be positioned on a straight line with respect to the second housing 4 via the hinge mechanism 5, and the support portion 19 is interposed. It is also possible to use the rod antenna 6 in a state in which the rod antenna 6 is expanded laterally with respect to the first housing 3. The mobile phone 30 forms an L-shaped dipole with the first housing 3 and the rod antenna 6 in this usage pattern.

  In addition, the mobile phone 30 is provided via the support unit 19 in a state where the first case 3 is linearly positioned with respect to the second case 4 via the hinge mechanism 5 as shown in FIG. Thus, it is possible to use the rod antenna 6 by expanding the rod antenna 6 at an angle with respect to the first housing 3. In the cellular phone 30, a V-shaped dipole is configured by the first housing 3 and the rod antenna 6 in this usage pattern.

  In the mobile phone 30, the liquid crystal display 9 provided in the first housing 3 can be horizontally long, and various forms of the dipole antenna 8 can be configured. In the cellular phone 30, as shown in FIG. 10, the first housing 3 is expanded in a horizontal state perpendicular to the second housing 4 via the hinge mechanism 5, and the rod antenna 6 is supported via the support portion 19. Can be used in parallel so as to face the first housing 4. In the mobile phone 30, a linear dipole is configured by the first housing 3 and the rod antenna 6 in such a usage pattern.

  In the mobile phone 30, as shown in FIG. 11, the first housing 3 is expanded in a horizontal state orthogonal to the second housing 4 via the hinge mechanism 5, and the rod antenna 6 is supported via the support portion 19. Can be expanded and used in a vertical direction perpendicular to the first housing 3. In the cellular phone 30, an L-shaped dipole is configured by the first housing 3 and the rod antenna 6 in this usage pattern.

  In the mobile phone 30, as shown in FIG. 12, the first housing 3 is expanded in a horizontal state orthogonal to the second housing 4 via the hinge mechanism 5, and the rod antenna 6 is supported via the support portion 19. Can be deployed and used in a state where the first housing 3 is angled from the vertical direction. In the cellular phone 30, a V-shaped dipole is configured by the first housing 3 and the rod antenna 6 in this usage pattern.

  The present invention is not limited to the mobile phone shown as the above-described embodiment, and may be applied to various mobile wireless devices such as a portable television receiver and a portable information terminal device (PDA: Personal Digital Assistant). Of course, this also applies.

It is a principal part front view which shows the use condition of the mobile telephone shown as embodiment. It is a block diagram of a mobile phone. FIG. 5 is a front view of a main part in a use state in which an L-shaped dipole is configured by deploying a rod antenna in a horizontal state laterally with respect to a first housing in a mobile phone. FIG. 3 is a front view of a main part in a use state in which a rod antenna is developed in a state in which a rod antenna is angled laterally with respect to a first housing to constitute a V-shaped dipole. The main part front view of the use state which expanded the 1st housing | casing in the horizontal state orthogonal to the 2nd housing | casing and comprised the rod antenna parallel to the 1st housing | casing and comprised the linear dipole in the mobile telephone. It is. In a cellular phone, the first housing is deployed in a horizontal state orthogonal to the second housing, and the rod antenna is deployed in a vertical direction orthogonal to the first housing to form an L-shaped dipole. It is a principal part front view of a state. In a cellular phone, the first housing is deployed in a horizontal state orthogonal to the second housing, and the rod antenna is deployed at an angle with respect to the first housing to form a V-shaped dipole. It is a principal part front view of a state. In the mobile phone shown as the second embodiment, it is a front view of an essential part in a use state in which an L-shaped dipole is configured by deploying a rod antenna in a horizontal state laterally with respect to a first housing. In the mobile phone shown as the second embodiment, the rod antenna is unfolded in a state of being angled laterally with respect to the first housing, and a V-shaped dipole is configured to be a main part front view in a use state. . In the mobile phone shown as the third embodiment, the first casing is expanded in a horizontal state orthogonal to the second casing, and the rod antenna is expanded in parallel so as to face the first casing. It is a principal part front view of the use condition which comprised the shape dipole. In the mobile phone shown as the third embodiment, the first casing is expanded in a horizontal state orthogonal to the second casing, and the rod antenna is expanded in a vertical direction orthogonal to the first casing. It is a principal part front view of the use condition which comprised the L-shaped dipole. In the mobile phone shown as the third embodiment, the first housing is deployed in a horizontal state orthogonal to the second housing and the rod antenna is angled from the vertical direction with respect to the first housing It is a principal part front view of the use condition which expanded | deployed and comprised the V-shaped dipole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone, 2 housing | casing, 3 1st housing | casing, 2nd housing | casing, 5 Hinge mechanism, 6 Rod antenna, 7 Conductor part, 8 Dipole antenna, 11 Circuit board, 12 High frequency power supply part, 13 Coaxial cable, 14 Balance / unbalance conversion element, 16 circuit board, 17 wireless transmission / reception circuit module, 19 support, 20 antenna element, 22 flexible circuit board

Claims (4)

In a portable wireless terminal device including a housing that is divided into at least a first housing and a second housing, and the first housing and the second housing are coupled to each other via a hinge mechanism so as to be expandable.
The first antenna element is configured by the conductor portion of the first casing, and the second antenna element is configured by the antenna member supported so as to be expandable with respect to the first casing. A balanced antenna is configured by performing balanced power feeding via a balanced / unbalanced conversion element from the wireless transmission / reception circuit unit provided on the second housing side for the two antenna elements,
A coaxial cable is used as a power supply line between the balanced / unbalanced converter provided on the first housing side and the wireless transmission / reception circuit unit provided on the second housing side, and the first cable is connected via the coaxial cable. A portable wireless terminal device, wherein ground connection is performed independently of a signal line between a circuit unit on a housing side and a circuit unit on the second housing side.   The said antenna member is located in the side facing the coupling | bond part with the said 2nd housing | casing which provided the said hinge mechanism with respect to the said 1st housing | casing, It is provided. Portable wireless terminal device.   2. The mobile phone according to claim 1, wherein the antenna member is provided at a part of the first housing that is positioned on a coupling portion side with the second housing provided with the hinge mechanism. Type wireless terminal device. The portable wireless terminal device according to claim 1, wherein the antenna member is held at an appropriate deployment angle with respect to the first housing.

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