US20070037619A1 - Method for controlling antennas of mobile terminal device and such a mobile terminal device - Google Patents

Method for controlling antennas of mobile terminal device and such a mobile terminal device Download PDF

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Publication number
US20070037619A1
US20070037619A1 US11/445,942 US44594206A US2007037619A1 US 20070037619 A1 US20070037619 A1 US 20070037619A1 US 44594206 A US44594206 A US 44594206A US 2007037619 A1 US2007037619 A1 US 2007037619A1
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US
United States
Prior art keywords
terminal device
mobile terminal
antenna
usage
antennas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/445,942
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English (en)
Inventor
Kozo Matsunaga
Takeshi Asano
Masaharu Itoh
Kazuo Fujii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lenovo Singapore Pte Ltd
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Lenovo Singapore Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lenovo Singapore Pte Ltd filed Critical Lenovo Singapore Pte Ltd
Assigned to LENOVO (SINGAPORE) PTE. LTD. reassignment LENOVO (SINGAPORE) PTE. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASANO, TAKESHI, FUJII, KAZUO, ITOH, MASAHARU, MATSUNAGA, KOZO
Publication of US20070037619A1 publication Critical patent/US20070037619A1/en
Priority to US12/509,125 priority Critical patent/US9318792B2/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2291—Supports; Mounting means by structural association with other equipment or articles used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0871—Hybrid systems, i.e. switching and combining using different reception schemes, at least one of them being a diversity reception scheme

Definitions

  • the present invention relates to a method for controlling the antennas of a mobile terminal device that has a plurality of antennas, for example. More particularly, the present invention relates to a method for controlling antennas in accordance with the usage of such a mobile terminal device and to such a mobile terminal device.
  • SAR Specific Absorption Rate
  • Japanese Unexamined Patent Publication No. 2003-283393 discloses a method for switching between “a first antenna that is designed to obtain preferable SAR properties in all usages” and “a second antenna that is not so designed” and using the selected one in accordance with how a mobile terminal device (e.g., a mobile phone) is being used for the purpose of reducing SAR associated with a mobile terminal device.
  • a mobile terminal device e.g., a mobile phone
  • the method switches between the first antenna and the second antenna according to the usage of the mobile terminal device, such as whether the external data terminal is in use or not, whether handsfree communication is being carried out or not, whether or not the external audio communication terminal is in use, whether the camera is in use or not, whether image communication is being carried out, or whether packet communication is being carried out.
  • a technique that is based on a method for determining the distance between the mobile terminal device and the human body and a technique based on a method for detecting opening/closing of the housing of the mobile terminal device have been also disclosed.
  • the method disclosed by Japanese Unexamined Patent Publication No. 2003-283393 is intended to improve SAR properties while avoiding degradation of communication speed and quality of a mobile terminal device as much as possible.
  • a mobile phone can have various usages, that is, a mobile phone may be used as a data communication terminal, audio communication terminal, camera, image communication terminal, packet communication terminal and so on as mentioned above.
  • a complex control method such as the one described above to select an antenna according to such usages.
  • such a device has to be small in size for use as a mobile phone.
  • a terminal has a plurality of antennas, when the terminal is used in close contact with the human body such as for voice call, it could be difficult to reduce SAR unless, transmission output itself is reduced for any antenna at any position selected.
  • Japanese Unexamined Patent Publication No. 2003-283393 it is necessary to select an antenna that is designed to limit transmission output in order to maintain preferable SAR properties. In this case, degradation of communication speed and quality of the mobile phone has to be accepted.
  • a laptop PC or handheld PC does not have so many usages as a mobile phone.
  • size of such mobile terminal devices for use as a terminal is less restricted.
  • control could become too complex if the antenna control method for a mobile phone terminal device described above is applied to a laptop PC or a handheld PC without modification.
  • many devices such as sensors are required for detecting how the terminal device is used.
  • the mechanism of a mobile terminal device itself becomes complex and there would be more causes of trouble accordingly.
  • communication speed or quality of the mobile terminal device degrades.
  • the present invention provides a method for controlling a plurality of antennas of a mobile terminal device, comprising determining the usage of the mobile terminal device, determining an antenna to be disabled among the plurality of antennas according to the usage that is determined by the determination of usage, and disabling the antenna disabling of which is determined by determination of an antenna to be disabled, wherein the determining of usage determines usage based on the display orientation of the display unit of the mobile terminal device.
  • the determining of usage determines usage based on the orientation of holding the mobile terminal device that is detected by a holding orientation sensing unit of the mobile terminal device.
  • the determining of usage determines usage based on installation status detected by an installation status sensing unit of the mobile terminal device.
  • an antenna to be disabled is determined as appropriate from among a plurality of antennas provided in accordance with the usage of a mobile terminal device.
  • the usage of the mobile terminal device is determined based on display orientation on the display unit, the orientation of holding the device, and combination of them and installation status.
  • the output of the plurality of antennas provided need not be necessarily reduced.
  • the method according to the invention controls antennas of a laptop PC or a handheld PC appropriately, for example.
  • antennas of a mobile terminal device can be controlled so as to reduce SAR on the human body without degrading communication speed or quality.
  • the method can control SAR adequately on a laptop PC or a handheld PC among others.
  • FIG. 1 generally illustrates a physical configuration of a mobile terminal device 1 according to an example of a preferred embodiment of the invention
  • FIG. 2 illustrates movement of a housing of the mobile terminal device 1 according to an example of the preferred embodiment of the invention
  • FIG. 3 illustrates movement of a housing of the mobile terminal device 1 according to an example of the preferred embodiment of the invention
  • FIG. 4 illustrates movement of a housing of the mobile terminal device 1 according to an example of the preferred embodiment of the invention
  • FIG. 5 illustrates the relation between the display orientation of the display unit 11 and antenna control of the mobile terminal device 1 according to an example of the preferred embodiment of the invention
  • FIG. 6 illustrates the relation between the display orientation of the display unit 11 and antenna control of the mobile terminal device 1 according to an example of the preferred embodiment of the invention
  • FIG. 7 illustrates the relation between the display orientation of the display unit 11 and antenna control of the mobile terminal device 1 according to an example of the preferred embodiment of the invention
  • FIG. 8 illustrates the relation between the display orientation of the display unit 11 and antenna control of the mobile terminal device 1 according to an example of the preferred embodiment of the invention
  • FIG. 9 shows a hardware configuration of the mobile terminal device 1 according to an example of the preferred embodiment of the invention.
  • FIG. 10 shows a functional configuration of the mobile terminal device 1 according to an example of the preferred embodiment of the invention.
  • FIG. 11 shows a functional configuration of the mobile terminal device 1 according to another example of the preferred embodiment of the invention.
  • FIG. 12 is a flow diagram illustrating the flow of antenna control according to an example of the preferred embodiment of the invention.
  • FIG. 13 is a flow diagram illustrating the flow of antenna control according to an example of the preferred embodiment of the invention.
  • FIG. 14 is a flow diagram illustrating the flow of antenna control according to an example of the preferred embodiment of the invention.
  • FIG. 1 generally illustrates a configuration of a mobile terminal device 1 according to an example of a preferred embodiment of the invention.
  • the mobile terminal device 1 has two housings 14 and 15 that are approximately rectangular parallelpipeds.
  • the housing 14 has an input unit 10
  • the housing 15 has a display unit 11 .
  • the housings 14 and 15 are connected by a joint unit 13 at a point at the center of their edge, and can be moved in the direction of opening/closing the housings.
  • the housing 15 can be rotated at least 180° with the housing 15 perpendicular to the housing 14 .
  • the mobile terminal device 1 may be used as a usual laptop PC as shown in FIG.
  • FIG. 1 or as a handheld PC that has a touch panel input unit 16 and the like by rotating the housing 15 at the joint unit 13 as shown in FIG. 2 and folding the housing 15 with the display unit onto the housing 14 that has the input unit 10 as illustrated in FIGS. 3 and 4 .
  • a laptop PC is not limited to such one shown in FIG. 1 , but it may be a so-called portable personal computer that has parts such as a CPU, memory, hard disk device, keyboard, display panel and the like.
  • a handheld PC is not limited to such one shown in FIG. 4 , but it may be a so-called portable computer or an information processing terminal that also has a CPU, memory, hard disk device, touch panel, pen input panel or display panel as input means. Further, devices falling within categories called electronic organizer or PDA may be also included.
  • the terminal device may include a keyboard as input means.
  • the mobile terminal device 1 has a first antenna 100 and a second antenna 110 on each of two sides of the housing 15 that supports the display unit 11 . These antennas are connected to a wireless LAN card 120 and the antennas and the LAN card operate in cooperation to realize communication means of the mobile terminal device 1 .
  • the mobile terminal device 1 further includes a display orientation rotation button 17 on the same surface as the display unit 11 of the housing that supports the display unit 11 . By pressing the button 17 , a user can change the orientation of display on the display unit 11 by a predetermined angle, e.g., 90° and 180°.
  • the display orientation rotation button 17 may be provided at any position on the housings of the mobile terminal device 1 as long as it may be operated both when the terminal device 1 is used as a laptop PC ( FIG. 1 , for example) and as a handheld PC ( FIG. 4 , for example).
  • the display orientation of the display unit 11 may be automatically changed based on the difference in positional relationship of the two housings for the case the terminal is used as a laptop PC as shown in FIG. 1 and the case it is used as a handheld PC as shown in FIG. 4 .
  • FIG. 5 illustrates the display orientation of the mobile terminal device 1 in a first portrait display mode.
  • this display mode it is determined that the second antenna 110 that is positioned lower relative to the display orientation is closer to the user's body, and the second antenna 110 is disabled in consideration of the way the user holds the terminal device 1 .
  • FIG. 6 illustrates the display orientation of the mobile terminal device 1 in a second portrait display mode.
  • the display orientation in this mode is shifted 180° from the first portrait display mode shown in FIG. 5 .
  • the user of the mobile terminal device 1 can switch between these display modes by pressing the display orientation rotation button 17 .
  • in this display mode it is determined that both the first antenna 100 and second antenna 110 are away from the user's body and both the antennas are enabled considering the way the user holds the terminal device 1 .
  • an antenna with better use conditions is selected for use by a known method conventionally employed.
  • the first antenna 100 positioned lower relative to the display orientation is considered to be closer to the user's body considering how the user holds the terminal device 1 , and the first antenna 100 is disabled.
  • a second landscape display mode of the mobile terminal device 1 as shown in FIG. 8 it is determined that both the first antenna 100 and second antenna 110 are away from the user's body considering how the user holds the terminal device 1 , and both the antennas are enabled. In this case, an antenna with better use conditions is selected for use by a known method conventionally employed.
  • an antenna positioned lower relative to display orientation is considered to be closer to the user's body and can be automatically disabled taking into consideration how the user holds the terminal. Consequently, an antenna closer to the hand or body of the user holding the mobile terminal device I is disabled and only an antenna farther from the user's hand or body is enabled, so that SAR on the human body can be minimized while the user can use wireless communication all the time.
  • an acceleration sensor may be included in the housing of the mobile terminal device 1 and any of the four usages shown in FIGS. 5-8 may be determined from the orientation of holding the terminal that is detected by the acceleration sensor. Specifically, if an antenna exists on a side that is determined to be positioned downmost among the four sides of the housing, it is determined that the antenna is closer to the user's body and is disabled. In this case, the determination can be made without using information on the display orientation on the display unit 11 .
  • the display orientation of the display unit may be automatically changed according to the determination of the vertical relationship of the housings. This allows the display orientation of the display unit 11 to be changed and an antenna more suitable for the display orientation to be selected without the user pressing the display orientation rotation button 17 whenever the user changes the way of holding the mobile terminal device 1 .
  • the connection may be detected by a sensor, and both the first and second antennas 100 and 110 may be enabled regardless of the display orientation by the instruction for the terminal detected by an acceleration sensor.
  • an antenna with better use conditions would be selected for use by a known method conventionally employed.
  • FIG. 9 illustrates a hardware configuration of the mobile terminal device 1 of the invention.
  • a control unit 140 controls the entire mobile terminal device 1 .
  • the mobile terminal device 1 also has a communication control unit 130 that includes an antenna control unit 131 for controlling the first and second antennas 100 and 110 .
  • the antenna control unit 131 determines an antenna to be disabled and stops the use of the antenna according to the determination as described earlier.
  • the mobile terminal device 1 may include an acceleration sensor 150 .
  • the mobile terminal device may also include a docking sensor 160 for detecting whether the terminal device 1 is connected to a docking station. Using detection result by these sensors, the antenna control unit 131 controls the antennas in cooperation with the control unit 140 as mentioned above.
  • These pieces of hardware are interconnected by a bus 180 . Programs stored in a storage unit 170 are read out and executed as necessary by the control unit 140 , causing the pieces of hardware to cooperate to realize the various means of the invention.
  • the acceleration sensor 150 is available in various mechanisms, such as one that is combination of piezoelectric ceramic device and electrodes.
  • acceleration gravitational acceleration in resting state, for example
  • the piezoelectric ceramic devices distort to generate stress internally.
  • the stress is converted to electric signal (electric charge) with piezoelectric effect and the direction and magnitude of the acceleration can be detected from the electric signal. This allows the direction of the gravitational acceleration to be detected in resting state, and the orientation in which the mobile terminal device 1 is held can be calculated from the direction.
  • FIG. 10 illustrates a functional configuration of the mobile terminal device 1 according to an example of the preferred embodiment of the invention.
  • the control unit 140 controls the entire mobile terminal device 1 .
  • the control unit 140 provides various functions of the mobile terminal device 1 in conjunction with the antenna control unit 131 for controlling the first and second antennas 110 and 110 , a built-in button controller 240 for controlling built-in buttons such as the display orientation rotation button 17 , and a graphic controller 250 for controlling the display unit 11 .
  • OS operating system
  • various user applications such as a word processor can run.
  • the OS 200 drives various pieces of hardware via the control unit 140 , antenna control unit 131 , built-in button controller 240 , and graphic controller 250 by way of kernel-level process groups that consist of a built-in button driver 220 , a graphic driver 230 and the like.
  • the built-in button controller 240 senses the pressing.
  • the built-in button controller 240 then informs the OS 200 of the pressing via the built-in button driver 220 .
  • the OS 200 sends a command for rotating the screen by a predetermined rotation angle (e.g., 90°) to the graphic controller 250 via the graphic driver 230 .
  • the graphic controller 250 receives the command and rotates the display orientation of the display unit 11 (e.g., 90°) accordingly.
  • the control unit 140 confirms the display orientation of the display unit 11 to the OS 200 .
  • the OS 200 obtains information on display orientation from the graphic controller 250 via the graphic driver 230 .
  • the control unit 140 obtains the information on display orientation from the OS 200 , determines whether to disable/enable the first and/or second antennas based on the information on display orientation, and executes the determination via the antenna control unit 131 .
  • FIG. 11 illustrates a functional configuration of the mobile terminal device 1 according to another example of the preferred embodiment of the invention.
  • the control unit 140 controls the entire mobile terminal device 1 .
  • the control unit 140 provides various functions of the mobile terminal device 1 in conjunction with the antenna control unit 131 for controlling the first and second antennas 100 and 110 , a device controller 270 for controlling the acceleration sensor 150 and docking sensor 160 , and a graphic controller 250 for controlling the display unit 11 .
  • On the operating system (OS) 200 various user applications such as a word processor can run.
  • the OS 200 drives various pieces of hardware via the control unit 140 , antenna control unit 131 , device controller 270 , and graphic controller 250 or the like, by way of kernel-level process groups that consist of the device driver 260 and graphic driver 230 .
  • the acceleration sensor 150 detects the change.
  • the change is informed to the OS 200 via the device driver 260 .
  • the control unit 140 is informed of the change by the OS 200 , and based on the information on the change, determines whether to disable/enable the first and/or second antennas and executes the determination via the antenna control unit 131 .
  • the docking sensor 160 senses the connection of the mobile terminal device 1 to a docking station (not shown).
  • the control unit 140 recognizes the connection and changes the display orientation of the display unit 11 to the second landscape display mode shown in FIG. 8 via the graphic controller 250 .
  • the control unit 140 enables both the first and second antennas via the antenna control unit 131 .
  • an antenna with better use conditions is selected for use by a known method conventionally employed.
  • FIG. 12 is a flow diagram illustrating the flow of antenna control according to an example of the preferred embodiment of the invention.
  • the control unit 140 determines whether or not the display orientation rotation button 17 has been pressed (step S 01 ). If it determines that the button has been pressed, the control unit 140 queries the OS (operating system) running on the mobile terminal device 1 about the display orientation of the display unit 11 (step S 02 ).
  • OS operating system
  • the antenna control unit 131 disables the second antenna 110 (step S 04 ).
  • the query returns the second portrait display mode shown in FIG. 6 (step S 05 )
  • the antenna control unit 131 enables both the first and second antennas 100 and 110 (step S 06 ). In the latter case, an antenna with better use conditions is selected for use by a known method conventionally employed.
  • the antenna control unit 131 disables the first antenna 100 (step S 08 ). If the query returns the second landscape display mode shown in FIG. 8 (step S 09 ), the antenna control unit 131 enables both the first and second antennas 100 and 110 (step S 10 ). In the latter case, an antenna with better use conditions is selected for use by a known method conventionally employed.
  • step S 01 control starting from step S 01 is repeated until the use of the mobile terminal device ends (step S 11 ).
  • FIG. 13 is a flow diagram illustrating the flow of antenna control according to another example of the preferred embodiment of the invention.
  • the control unit 140 determines whether or not the holding orientation of the mobile terminal device 1 has changed (step S 101 ). Then, if the control unit 140 determines that the holding orientation has changed and that the second side shown in FIG. 5 is at the bottom (step S 103 ), the antenna control unit 131 disables the second antenna 110 (step S 104 ). Meanwhile, if the control unit 140 determines that the holding orientation has changed and that the fourth side shown in FIG. 5 is at the bottom (step S 105 ), the antenna control unit 131 enables both the first and second antennas 100 and 110 (step S 106 ). In the latter case, an antenna with better use conditions is selected for use by a known method conventionally employed.
  • the antenna control unit 131 disables the first antenna 100 (step S 108 ). If the control unit 140 determines that the holding orientation has changed and that the third side shown in FIG. 5 is at the bottom (step S 109 ), the antenna control unit 131 enables both the first and second antennas 100 and 110 (step S 110 ). In the latter case, an antenna with better use conditions is selected for use by a known method conventionally used.
  • Control starting at step S 101 is repeated in such a manner until the use of the mobile terminal device ends (step S 111 ).
  • FIG. 14 is a flow diagram illustrating the flow of antenna control according to yet another example of the preferred embodiment of the invention.
  • the control unit 140 determines whether or not the mobile terminal device 1 has been connected to a docking station (step S 121 ). If the control unit 140 determines that the terminal is connected to the docking station, the control unit 140 changes the display orientation of the display unit 11 to the second landscape display mode of FIG. 8 (step S 122 ), and the antenna control unit 131 enables both the first and second antennas 100 and 110 (step S 123 ).
  • an antenna with better use conditions is selected for use by a known method conventionally employed.
  • Control starting at step S 121 is repeated in such a manner until use of the mobile terminal device ends (step S 124 ).
  • any antenna that is positioned lower relative to the display orientation of the display unit can be disabled in the same way. Also, any antenna that is positioned downmost as determined by an acceleration sensor can be disabled in the same way as described above.
  • an antenna with its transmission output reduced is not necessarily required in the preferred embodiment of the invention, the invention is not intended to deny the use of such an antenna.
  • the terminal device has more antennas and transmission output of some of the antennas is reduced.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Set Structure (AREA)
  • Support Of Aerials (AREA)
US11/445,942 2005-06-03 2006-06-03 Method for controlling antennas of mobile terminal device and such a mobile terminal device Abandoned US20070037619A1 (en)

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JP2005-164280 2005-06-03
JP2005164280A JP4566825B2 (ja) 2005-06-03 2005-06-03 携帯端末装置のアンテナの制御方法及び当該携帯端末装置

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US9318792B2 (en) 2016-04-19
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