WO2011152427A1 - 携帯無線機 - Google Patents
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- Publication number
- WO2011152427A1 WO2011152427A1 PCT/JP2011/062541 JP2011062541W WO2011152427A1 WO 2011152427 A1 WO2011152427 A1 WO 2011152427A1 JP 2011062541 W JP2011062541 W JP 2011062541W WO 2011152427 A1 WO2011152427 A1 WO 2011152427A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ground
- housing
- antenna
- casing
- impedance
- Prior art date
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Classifications
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
- H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
- H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
- H04M1/0216—Foldable in one direction, i.e. using a one degree of freedom hinge
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
- H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
- H04M1/0235—Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
- H04M1/0237—Sliding mechanism with one degree of freedom
Definitions
- the present invention relates to a portable wireless device having an antenna using casing excitation, and particularly to a technique for reducing deterioration of antenna characteristics when the casing is held by hand.
- mobile phones which are a type of portable radio device
- miniaturization and high integration of devices are desired as functions are increased.
- mobile phones having various structures have been developed.
- a mobile phone having a folding structure in which two casings are provided, and the ends of the two casings are hinged as hinges is the mainstream. It has become.
- a mobile phone with a sliding structure in which two upper and lower housings are slidably connected, and a mobile phone with a straight structure composed of one housing.
- a conductive member constituting a hinge shaft in a hinge portion is operated as an antenna element (antenna element), thereby eliminating the need for a dedicated antenna element and reducing the size of the device. Yes (see, for example, Patent Document 1). Since the conductive member is electrically connected to one of the upper and lower housings to be fed and insulated from the other, it is not affected by the opening / closing operation of the other housing, so that a good antenna can be obtained. It is possible to maintain the characteristics.
- the mobile phone housing is provided with a large metal ground, such as a substrate ground pattern or housing frame, so that power is excited from one housing to the other housing ground.
- the other casing itself can be used as an antenna element.
- the present invention has been made in view of the above-described conventional problems.
- the object of the present invention is to provide a structure in which a ground is fed and an antenna is provided as in the case of using case excitation, and the vicinity of the ground is manually formed.
- An object of the present invention is to provide a portable wireless device that can reduce deterioration of antenna characteristics even when held.
- the portable wireless device of the present invention includes a first power feeding unit, a first ground that provides a reference potential to the first power feeding unit, a second power feeding unit, and the second power feeding.
- a second ground for providing a reference potential to the first section a first transmission line for electrically connecting the first power feeding section and the second ground, and the second power feeding section and the first ground
- a second transmission line that is electrically connected to the ground is provided.
- a 1st ground is excited and a 1st ground is operated as an antenna element (1st antenna).
- the second ground can be excited and the second ground can be operated as an antenna element (second antenna).
- the second antenna is compared with the deterioration of the antenna characteristics of the first antenna.
- the deterioration of the antenna characteristics is small.
- the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when one of the vicinity of the first ground and the vicinity of the second ground is held by hand, the deterioration of the total antenna characteristics can be reduced by using, for example, diversity. It becomes possible.
- the portable wireless device in the configuration having the first antenna and the second antenna by feeding the ground, it is possible to reduce the deterioration of the antenna characteristics even when the vicinity of the ground is held by hand. It becomes.
- the portable wireless device of the present invention also includes a first power supply unit, a first ground that provides a reference potential to the first power supply unit, a second power supply unit, and the second power supply unit. And a transmission line having a first terminal and a second terminal, the first terminal of the transmission line being connected to the first terminal.
- the first terminal of the transmission line is electrically connected to the first power feeding unit and the first ground via a first branch point disposed between the second terminal and the second terminal.
- the first antenna and the second antenna can be suitably operated in either the same or different frequency bands.
- the configuration of the transmission line can be simplified.
- the second antenna is compared with the deterioration of the antenna characteristics of the first antenna.
- the deterioration of the antenna characteristics is small.
- the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when one of the vicinity of the first ground and the vicinity of the second ground is held by hand, the deterioration of the total antenna characteristics can be reduced by using, for example, diversity. It becomes possible.
- the portable wireless device in the configuration having the first antenna and the second antenna by feeding the ground, it is possible to reduce the deterioration of the antenna characteristics even when the vicinity of the ground is held by hand. It becomes.
- the portable wireless device of the present invention is based on the first power supply unit, the first ground that provides the reference potential to the first power supply unit, the second power supply unit, and the second power supply unit.
- a second ground for providing a potential a first transmission line for electrically connecting the first power supply unit and the second ground; and a second power supply unit and the first ground. It has the structure provided with the 2nd transmission line electrically connected.
- FIG. 4 is a schematic diagram illustrating a configuration example in the vicinity of a housing coupling portion when capacitive power feeding is applied in the portable wireless device, where (a) illustrates a state when viewed from the front in an open state, and (b) illustrates an open state. The cross section of the side in a state is shown.
- FIG. 4 is a schematic diagram illustrating an example of a configuration near a housing coupling portion when direct power feeding is applied in the portable wireless device, where (a) illustrates a state when viewed from the front in an open state, and (b) illustrates a housing. The structure near the body connecting part is shown enlarged.
- FIG. 2 is a block diagram illustrating an example of a communication system for the portable wireless device, in which a first antenna and a second antenna are connected to the same tuner. It is a block diagram which shows an example of the communication system of the said portable radio, and shows a structure in case a 1st antenna and a 2nd antenna are connected to a separate tuner. It is a schematic diagram which shows other embodiment of the portable radio
- the portable wireless device according to the present invention is not limited to a mobile phone, and may be, for example, a portable wireless device with a TV that does not have a call function, or a PDA with a wireless communication function. Is also possible.
- FIG. 1 is a schematic diagram illustrating a configuration example of the mobile phone 10 according to the present embodiment.
- the mobile phone 10 (portable wireless device) of the present embodiment includes a first casing 11, a second casing 12, and a casing connecting portion 13.
- the housing connecting portion 13 is a portion (hinge structure) in which the end of the first housing 11 and the end of the second housing 12 are hinged.
- the casing 11 and the second casing 12 are rotatably connected. That is, the mobile phone 10 is a device having a folding structure in which the first housing 11 and the second housing 12 are rotatable about the housing connecting portion 13.
- the first casing 11 and the second casing 12 contain the structural parts of the mobile phone 10.
- the first housing 11 includes a first power supply unit 14.
- the second housing 12 includes a second power feeding unit 16. Further, the remaining portions (not shown) of the first casing 11 and the second casing 12 are appropriately provided with a configuration of a general mobile phone.
- the first casing 11 is provided with a display unit, a speaker, an imaging device for a camera, a circuit board, and the like (all not shown).
- the second casing 12 is provided with operation keys for key input, a microphone, a control unit, a circuit board, and the like (all not shown).
- first casing 11 and the second casing 12 As the material of the first casing 11 and the second casing 12, a resin material or a metal material can be used.
- first casing 11 and the second casing 12 have a metal frame (magnesium (Mg) frame or the like) disposed / integrated, or a reinforcing metal (stainless steel (SUS) or aluminum). (Al) or the like may be added.
- the first casing 11 includes a first ground 15 that serves as a reference potential (ground potential) for the wireless circuit and the first power supply unit 14 disposed in the first casing 11.
- the first ground 15 includes a ground pattern of a circuit board built in the first casing 11, a metal frame of the first casing 11, a metal for reinforcement of the first casing 11, and a first casing. This is a ground pattern of a liquid crystal panel provided on the body 11.
- the second housing 12 includes a second ground 17 that serves as a reference potential (ground potential) for the radio circuit and the second power supply unit 16 disposed in the second housing 12.
- the second ground 17 includes a ground pattern of a circuit board built in the second housing 12, a metal frame of the second housing 12, and a metal for reinforcement of the second housing 12 (SUS, aluminum, etc. ), Shield case, etc.
- the first power feeding unit 14 is built in the first housing 11, and is electrically connected to the second ground 17 via a transmission line (first transmission line) provided in the housing coupling unit 13. Connected. As a result, power is supplied from the first power supply unit 14 to the second ground 17.
- the 1st electric power feeding part 14 is electrically connected to the radio
- the second power feeding unit 16 is built in the second housing 12 and is electrically connected to the first ground 15 via a transmission line (second transmission line) provided in the housing coupling unit 13. Connected. As a result, power is supplied from the second power supply unit 16 to the first ground 15.
- the second power supply unit 16 is electrically connected to a wireless circuit (not shown) corresponding to the function of the communication system.
- connection between a transmission line and the 1st electric power feeding part 14, the connection between a transmission line and the 2nd ground 17, the connection between a transmission line and the 1st ground 15, and the transmission line and the 2nd electric power feeding part 16 may be a direct current (DC) connection or a high frequency (RF) connection (for example, a connection by a capacity or the like).
- DC direct current
- RF high frequency
- each of the wireless circuits may be mounted in any housing, for example, may be disposed in each of the first housing 11 and the second housing 12, or the first housing You may arrange
- FIG. there may be one radio circuit depending on the function of the communication system.
- the wireless circuit may be disposed in either the first casing 11 or the second casing 12.
- a wireless circuit indicates a circuit that includes a matrix calculation unit, a control unit, and the like in addition to a circuit unit that realizes a transmission / reception function.
- the radio circuit can be realized, for example, with a configuration similar to a conventional circuit configuration (for example, a cellular communication circuit) and is provided on a circuit board.
- the cellular phone 10 having the above configuration can operate the first casing 11 as an antenna element and operate the second casing 12 as an antenna element.
- the principle of operating as the antenna element will be described with reference to FIG.
- the set vertical direction (longitudinal direction of the mobile phone 10 in FIG. 1) is closer to ⁇ / 4 of the operating frequency than the set horizontal direction (short direction of the mobile phone 10 in FIG. 1). Talk about the case.
- the second ground 17 By supplying power from the first power supply unit 14 to the second ground 17, a current flows in a direction indicated by an arrow C in FIG. 1 (“current flowing through the first housing 11 (arrow D) ⁇ second Current flowing through the housing 12 (arrow C) ").
- the second ground 17 operates as an antenna element when the second ground 17 is excited, and the antenna performance is ensured in the entire second casing 12. Therefore, the second housing 12 can be operated as an antenna element.
- the mobile phone 10 is provided with two antennas using case excitation by disposing one feeding point in each case and feeding power from the feeding point toward another case. Is possible.
- the antenna realized by the first casing 11 is referred to as a first antenna
- the antenna realized by the second casing 12 is referred to as a second antenna.
- the first ground 15 and the second ground 17 should have a larger area. Ideally, it is desirable to be disposed on the entire surface of the housing, and the larger the area, the easier it is to use as an antenna.
- a power feeding method such as capacitive power feeding or direct power feeding can be used.
- FIG. 2 is a schematic diagram showing an example of the configuration in the vicinity of the casing connecting portion 13 in the mobile phone 10 to which the capacitive power supply is applied.
- FIG. (B) shows the cross section of the side surface in the open state.
- the casing connecting portion 13 is configured by a portion where the end of the first casing 11 and the end of the second casing 12 overlap each other.
- the first power supply pad 22 is provided in the first housing 11, and the second power supply pad 23 is provided in the second housing 12.
- the first power supply pad 22 is electrically connected to the first ground 15.
- the second power supply pad 23 is electrically connected to the second power supply unit 16.
- the first power supply pad 22 and the second power supply pad 23 are made of a conductive member and are separated from each other. Therefore, between the first power supply pad 22 and the second power supply pad 23, the first case 11 and the second case 12 are in an open state although they are non-conductive in direct current. Sometimes, the first power supply pad 22 and the second power supply pad 23 are coupled with each other with capacitance determined by the area and distance of the first power supply pad 22 and the second power supply pad 23 facing each other. That is, since the first power supply pad 22 and the second power supply pad 23 are coupled (connected) at a high frequency, power can be supplied.
- FIG. 3 is a schematic diagram showing a configuration example in the vicinity of the casing connecting portion 13 in the mobile phone 10 to which direct power feeding is applied, and (a) is a view when viewed from the front in the open state. (B) expands and shows the structure near the housing
- a conductor 24 is provided for connecting the first ground 15 of the first housing 11 and the second power supply portion 16 of the second housing 12 in a DC manner. ing.
- the conductor 24 is disposed through the housing connecting portion 13 so as to reach the second housing 12 from the first housing 11.
- the conductor 24 is composed of a conductive member.
- a coaxial cable, a sheet metal, a conductive hinge, or the like is used as the conductor 24 for example, a coaxial cable, a sheet metal, a conductive hinge, or the like is used.
- FIG. 3 shows a configuration example in which the conductor 24 is realized by the conductive hinge 25 and the spring metal plate 27.
- the conduction hinge 25 has a cylindrical shape, and a protrusion 26 is provided on one end face.
- the conductive hinge 25 is accommodated in a hole formed in the housing connecting portion 13 while the protruding portion 26 contacts the spring metal plate 27.
- the conduction hinge 25 has a conduction hinge spring portion 29 having a spring property, and is electrically connected to the housing connecting portion 13. Thereby, the conduction hinge 25 is electrically connected to the first ground 15 of the first housing 11.
- the spring metal plate 27 is electrically connected to the second power supply unit 16 of the second housing 12. Therefore, the first ground 15 and the second power supply unit 16 are connected in a direct current manner.
- a power feeding pattern 28 that is passed through a housing connecting portion 21 constituted by a flexible substrate, a thin coaxial cable, or the like can be used.
- the housing connection unit 21 is for electrically connecting a circuit board provided in the first housing 11, a circuit board provided in the second housing 12, a ground, and the like.
- the mobile phone 10 may include a housing connection unit 21 as appropriate.
- the housing connection portion 21 is disposed through the housing connecting portion 13 so as to reach from the first housing 11 to the second housing 12.
- the power feeding pattern 28 can be added to the housing connection portion 21 or formed integrally with the housing connection portion 21.
- a transmission line constituted by the first power supply pad 22 and the second power supply pad 23 is provided for power supply from the first power supply unit 14 to the second ground 17.
- the first power supply pad 22 is electrically connected to the first power supply unit 14
- the second power supply pad 23 is electrically connected to the second ground 17.
- a transmission line constituted by the conductor 24 is provided for feeding power from the first feeding unit 14 to the second ground 17.
- the conductor 24 connects the first power feeding unit 14 and the second ground 17 in a DC manner.
- a transmission line (first transmission line) between the first power supply unit 14 and the second ground 17 is configured to perform capacitive power supply, and transmission between the second power supply unit 16 and the first ground 15 is performed.
- the line (second transmission line) can be configured to feed power directly, and vice versa.
- the power feeding method is not limited to capacitive power feeding and direct power feeding, and other power feeding methods may be used. Therefore, one of the first transmission line and the second transmission line is configured to perform capacitive power feeding (configured to have a configuration in which the input source and the output destination are connected by capacitive coupling in high frequency), and the other Can be configured to perform another power feeding method different from the capacitive power feeding and the direct power feeding. In addition, one of the first transmission line and the second transmission line is configured to perform direct power feeding (configured to have a configuration in which the input source and the output destination are connected in a direct current manner), and the other is configured to have capacitive power feeding and Another power feeding method different from direct power feeding may be performed.
- the first housing 11 operates as the first antenna
- the second housing 12 operates as the second antenna. Therefore, a communication system using the first antenna and the second antenna in the mobile phone 10 will be described next.
- the mobile phone 10 can be appropriately equipped with other functions (TV viewing function, GPS function, etc.) other than the mobile phone communication function. Therefore, the first antenna and the second antenna provided in the mobile phone 10 can be used as the antenna of the radio unit for realizing any of the functions.
- first antenna and the second antenna may be used in the same communication system or in different communication systems. Furthermore, the first antenna and the second antenna can be used in diversity, switching, and MIMO (Multiple Input Multiple Output).
- MIMO Multiple Input Multiple Output
- FIGS. 5 and 6 show a communication system in the case where the first antenna and the second antenna are used as antennas dedicated to reception of digital broadcasting or the like.
- the mobile phone 10 is separately provided with an antenna for the mobile phone.
- the mobile phone 10 may be provided with an antenna other than the first antenna and the second antenna according to the function to be mounted.
- FIG. 5 is a block diagram showing a configuration of the communication system 30A when the first antenna and the second antenna are connected to the same tuner.
- the communication system 30A includes a first antenna 31, a second antenna 32, a cellular antenna 33, a tuner 34, a camera 35, a wireless communication unit 36, a control unit 37, a storage memory 38, and a key input unit. 39, a display unit 40, a speaker 41, and a microphone.
- the camera 35, the display unit 40, and the speaker 41 are provided in the first housing 11, and the tuner 34, the wireless communication unit 36, the control unit 37, the storage memory 38, the key input unit 39, and the microphone 42 are Although provided in the second housing 12, the present invention is not limited to this.
- the control unit 37 is electrically connected to the tuner 34, camera 35, wireless communication unit 36, storage memory 38, key input unit 39, display unit 40, speaker 41, and microphone 42, respectively.
- the control unit 37 performs drive control and performs bidirectional signal transmission / reception with respect to the tuner 34, the camera 35, and the wireless communication unit 36.
- the control unit 37 also controls input operations to the key input unit 39, controls image display on the display unit 40, controls audio output from the speaker 41, and controls audio input to the microphone 42. To do. Further, the control unit 37 stores data / signals in the storage memory 38 and acquires data / signals from the storage memory 38.
- the cellular antenna 33 is a transmission / reception compatible antenna for mobile phones.
- the cellular antenna 33 may be provided in either the first casing 11 or the second casing 12 and is electrically connected to the wireless communication unit 36. When power is supplied from the wireless communication unit 36, the cellular antenna 33 transmits and receives radio waves.
- the cellular antenna 33 includes GSM (Global System for Mobile Communications: 900 MHz) band, DCS (Digital Cellular Systems: 1.8 GHz) band, PCS (Personal Communication Services: 1.9 GHz) band, and WCDMA (Wideband Code Division Multiple Access): 2 GHz) band or the like, or an antenna that resonates in one frequency band.
- GSM Global System for Mobile Communications: 900 MHz
- DCS Digital Cellular Systems: 1.8 GHz
- PCS Personal Communication Services: 1.9 GHz
- WCDMA Wideband Code Division Multiple Access
- the first antenna 31 is an antenna realized by using the first casing 11 (first ground 15) as an antenna element.
- the second antenna 32 is an antenna realized by using the second casing 12 (second ground 17) as an antenna element.
- the first antenna 31 and the second antenna 32 are electrically connected to the same tuner 34.
- the first antenna 31 and the second antenna 32 can be antennas that resonate in a UHF (Ultra High Frequency: 470 to 770 MHz) band.
- the mobile phone 10 equipped with the communication system 30A can receive the best radio wave (digital broadcast signal) by using diversity, switching, or MIMO.
- the best radio wave digital broadcast signal
- FIG. 6 is a block diagram showing a configuration of the communication system 30B when the first antenna and the second antenna are respectively connected to different tuners.
- the communication system 30B shown in FIG. 6 includes a first tuner 43 and a second tuner 44 in addition to the configuration excluding the tuner 34 in the configuration of the communication system 30A shown in FIG.
- the first antenna 31 is electrically connected to the first tuner 43
- the second antenna 32 is electrically connected to the second tuner 44.
- the mobile phone 10 equipped with the communication system 30B includes two tuners (the first tuner 43 and the second tuner 44), it is possible to decode digital broadcast signals of different channels in parallel. It becomes. Therefore, for example, it is possible to divide the display area of the display unit 40 and simultaneously display program videos of different channels.
- the frequency band in which the first antenna 31, the second antenna 32, and the cellular antenna 33 resonate is not limited to the above-described frequency band, and can be appropriately changed according to the specifications of the communication system. It may resonate in other frequency bands.
- the mobile phone 10 includes the first casing 11, the second casing 12, and the casing connecting portion 13 that connects the first casing 11 and the second casing 12.
- the first casing 11 and the second casing 12 are configured to be rotatable about the casing connecting portion 13, and the first casing 11 includes the first power feeding portion 14 and the first casing 11.
- the second housing 12 includes a second power feeding unit 16 and a second ground 17, the housing connecting unit 13 includes two transmission lines, and the first power feeding unit 14. Is electrically connected to the second ground 17 via one transmission line, and the second power supply unit 16 is electrically connected to the first ground 15 via the other transmission line. have.
- the first ground 15 is excited by supplying power from the second power supply unit 16 to the first ground 15, and the first ground 15, that is, the first housing 11 is connected to the antenna element.
- First antenna can be operated. Further, by feeding power from the first power feeding section 14 to the second ground 17, the second ground 17 is excited, and the second ground 17, that is, the second housing 12 is connected to the antenna element (second It can be operated as an antenna.
- the second antenna is compared with the deterioration of the antenna characteristics of the first antenna.
- the deterioration of the antenna characteristics is small.
- the second housing 12 is held by hand, the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when one of the first casing 11 and the second casing 12 is held by hand, deterioration of the total antenna characteristics can be reduced by using, for example, diversity. It becomes possible.
- the position of the first antenna and the first antenna It is different from the position of the second antenna. Therefore, since the antenna position is different, it is possible to use space diversity, and it is possible to reduce the deterioration of the antenna characteristics as compared with the conventional one.
- the mobile phone 10 may be used in the vertical orientation with the first housing 11 provided with the display unit on the upper side and the second housing 12 on the lower side.
- the mobile phone 10 may be used in a landscape orientation with the first housing 11 on the left and the second housing 12 on the right. Regardless of the orientation, the cellular phone 10 can reduce degradation of antenna characteristics regardless of how it is held when touched with a hand.
- the mobile phone 10 has a folding structure in which the first casing 11 and the second casing 12 are rotatable about the casing connecting portion 13 as an axis, but the present invention is not limited to this.
- a mobile phone having a so-called slide-type structure may be used as long as it has a structure in which a certain distance can be taken between the first antenna and the second antenna.
- the first antenna first ground 15
- the second antenna second ground 17
- reception is performed with the first antenna or the second antenna. It is only necessary that the processed signal is processed by the baseband unit (control unit or the like) via the tuner.
- the first antenna or the second antenna is used as an antenna for a transmission system, a signal generated in the baseband unit is converted into an RF signal by a wireless circuit and supplied to each antenna through a power feeding unit. As long as it comes to radiate.
- the first power supply unit 14 and the second power supply unit 16 may be connected to different wireless circuits, but may be connected to the same wireless circuit.
- FIG. 9 is a schematic diagram illustrating an example of a configuration in which the first power supply unit 14 and the second power supply unit 16 are connected to the same wireless circuit 18.
- the first power supply unit 14 is connected to a radio circuit 18 disposed in the first housing 11 via a substrate pattern, a coaxial cable, and the like.
- the second power feeding unit 16 is connected to the radio circuit 18 disposed in the first housing 11 via a housing connection unit 21 configured by a coaxial cable, a flexible cable, or the like.
- both the first power supply unit 14 and the second power supply unit 16 may be connected to the same wireless circuit 18.
- the radio circuit 18 may function as a radio circuit for reception such as a radio circuit for diversity communication, or may function as a radio circuit for transmission such as a radio circuit for MIMO. Or a combination of both.
- the wireless circuit 18 may be either the first housing 11 or the second housing 12. It may be arranged on the body.
- FIG. 10 is a schematic diagram illustrating an example of a configuration in which the first power supply unit 14 and the second power supply unit 16 are connected to wireless circuits that operate in different systems.
- a first radio circuit 18 (operating in the first frequency band) corresponding to DTV is arranged in the first casing 11, and Includes a second wireless circuit 19 (operating in the second frequency band) corresponding to the wireless LAN.
- the wireless circuit can be realized with a configuration similar to a conventional circuit configuration, and may be provided on a circuit board disposed in each housing, for example. Even when the first power supply unit 14 and the second power supply unit 16 are connected to wireless circuits operating in different systems, the wireless circuit is connected to the first housing 11 and the second housing 12. Each of them need not be provided, and may be arranged together in either one.
- the 1st electric power feeding part 14 and the 2nd electric power feeding part 16 are connected to the radio
- the direction of the current flowing in the first ground 15 and the direction of the current flowing in the second ground 17 are orthogonal to each other.
- both the first antenna and the second antenna are used by resonating in the ⁇ / 4 system, either the longitudinal end or the short end of the ground end from the feeding point is used.
- current flows in a direction where the electrical length is close to ⁇ / 4. Therefore, if the horizontal direction of the set (short direction of the ground) is closer to ⁇ / 4 of the operating frequency than the vertical direction of the set (longitudinal direction of the ground), the electrical length of the ground in the horizontal direction of the set is It is also possible to pass a current in the lateral direction of the ground by disposing the power supply unit of the system used near the quarter of the wavelength ⁇ outside the set lateral direction.
- the difference between the length of the first ground 15 in the short direction and the quarter of the wavelength of the second frequency band is the difference between the length of the second ground 17 in the short direction and the wavelength of the first frequency band. Is smaller than the difference between the first ground 15 and the first ground 15 by supplying power to the end of the first ground 15 in the short direction, thereby setting the direction of the current flowing through the first ground 15 to the short direction.
- the currents flowing through both antennas can be made orthogonal.
- the second power supply portion 16 may be connected to the end portion of the first ground 15 in the short direction.
- the difference between the length of the first ground 15 in the short direction and the quarter of the wavelength of the second frequency band is the difference between the length of the second ground 17 in the short direction and the wavelength of the first frequency band. If the difference is equal to or greater than one-fourth of the current, the direction of the current flowing through the second ground 17 is set to the short direction by supplying power to the end of the second ground 17 in the short direction.
- the currents flowing through both antennas can be made orthogonal.
- the first power supply portion 14 may be connected to the end portion of the second ground 17 in the short direction.
- connection state of the first and second transmission lines may be switched according to the positional relationship between the first casing 11 and the second casing 12.
- the first and second transmission lines are connected in a direct current or capacitive manner when the first casing 11 and the second casing 12 are opened. It is good also as a structure which will be disconnected (it cut
- the effect of changing the ground current flowing through the first casing 11 or the second casing 12 and other antennas by disconnecting the first and second transmission lines when the casing is closed Can be eliminated or reduced.
- two transmission lines that are not connected in accordance with opening and closing of the housing may be simultaneously provided, or only one of them may be provided.
- the first power supply pad 22 and the second power supply pad 23 may be separated from each other, hardly capacitively coupled, and power may not be supplied between the pads.
- the first ground 15 does not operate as an antenna when the casing is closed. Accordingly, it is possible to change the ground conduction condition of the housing by opening and closing the housing, and to reduce the influence on other antennas and wireless circuits with the housing closed.
- FIG. 7 is a schematic diagram showing a configuration example of the mobile phone 50 of the present embodiment.
- the mobile phone 50 (portable wireless device) of the present embodiment includes a housing connection unit 21 and a first impedance adjustment unit 51. , And a second impedance adjustment unit 52.
- the first impedance adjustment unit 51 matches the impedance between the second power supply unit 16 and the first ground 15, and has a predetermined impedance (first impedance).
- the first impedance adjustment unit 51 is provided on the path where the first ground 15 is electrically connected to the second power supply unit 16 and in the second housing 12.
- the second impedance adjustment unit 52 matches the impedance between the first power supply unit 14 and the second ground 17 and has a predetermined impedance (second impedance).
- the second impedance adjustment unit 52 is provided in the first housing 11 on a path where the second ground 17 is electrically connected to the first power supply unit 14.
- the first impedance adjustment unit 51 and the second impedance adjustment unit 52 can be realized by, for example, a configuration in which the connection between the transmission line, the ground, and the power supply is connected by capacitive coupling in a high frequency manner (capacitive coupling). .
- the first impedance adjustment unit 51 and the second impedance adjustment unit 52 can also be realized by appropriately arranging an inductance constant and a capacitance constant on the feed line (constant arrangement). For the first impedance adjusting unit 51 and the second impedance adjusting unit 52, either capacitive coupling or constant arrangement may be used. Further, the first impedance adjustment unit 51 may be different from each other such as capacitive coupling, and the second impedance adjustment unit 52 may be a constant arrangement or the like.
- first impedance and the second impedance are not limited to fixed-value impedances (for example, fixed-value inductors and capacitors), but may be variable impedances (for example, varicaps and variable inductors). .
- variable impedances for example, varicaps and variable inductors.
- the impedance value (constant) and the second impedance value (constant) may be the same or different.
- the mobile phone 50 it is possible to match the impedance between the second power supply unit 16 and the first ground 15 by appropriately setting the impedance of the first impedance adjustment unit 51.
- the impedance of the second impedance adjustment unit 52 it is possible to match the impedance between the first power feeding unit 14 and the second ground 17.
- the first impedance adjustment unit 51 is provided in the second casing 12, and the second impedance adjustment unit 52 is provided in the first casing 11. It is not limited. If the first impedance adjustment unit 51 is on a path where the first ground 15 is electrically connected to the second power supply unit 16, the first case 11, the second case 12, and the case It may be arranged in any of the body connecting portions 13. If the second ground 17 is on the path where the second ground 17 is electrically connected to the first power supply unit 14, the second impedance adjustment unit 52 and the second housing 12, and the housing It may be arranged in any of the body connecting portions 13.
- FIG. 8 is a schematic diagram showing a configuration example of the mobile phone 60 of the present embodiment.
- the mobile phone 60 (portable wireless device) of the present embodiment includes a housing connection unit 21 and a first impedance adjustment unit 61.
- the second impedance adjustment unit 62, the third impedance adjustment unit 63, and the fourth impedance adjustment unit 64 are provided.
- the casing connecting portion 13 of the mobile phone 60 is provided with one power transmission line. That is, one transmission line is shared.
- the transmission line has two terminals. One terminal (first terminal) of the transmission line is electrically connected to the first power supply unit 14 and the first ground 15 via the first branch point 65. The other terminal (second terminal) of the transmission line is electrically connected to the second power feeding unit 16 and the second ground 17 via the second branch point 66.
- the first impedance adjusting unit 61 matches the impedance between the second power feeding unit 16 and the first ground 15, and has a predetermined impedance (first impedance).
- the first impedance adjustment unit 61 is provided in the first housing 11 on a path where the first ground 15 is electrically connected to the first branch point 65.
- the second impedance adjustment unit 62 matches the impedance between the first power supply unit 14 and the second ground 17 and has a predetermined impedance (second impedance).
- the second impedance adjustment unit 62 is provided in the first housing 11 on a path where the first power supply unit 14 is electrically connected to the first branch point 65.
- the third impedance adjustment unit 63 matches the impedance between the second power supply unit 16 and the first ground 15, and has a predetermined impedance (third impedance).
- the third impedance adjustment unit 63 is provided in the second housing 12 on a path where the second power supply unit 16 is electrically connected to the second branch point 66.
- the fourth impedance adjustment unit 64 matches the impedance between the first power supply unit 14 and the second ground 17, and has a predetermined impedance (fourth impedance).
- the fourth impedance adjustment unit 64 is provided in the second housing 12 on a path where the second ground 17 is electrically connected to the second branch point 66.
- the first impedance adjustment unit 61, the second impedance adjustment unit 62, the third impedance adjustment unit 63, and the fourth impedance adjustment unit 64 can be realized by, for example, capacitive coupling or constant arrangement.
- the values (constants) of the first to fourth impedances may be the same or different. Further, each of the first to fourth impedances may be a fixed impedance or a variable impedance.
- the first and third impedances have frequency characteristics that allow only the current signal in the frequency band used by the impedance adjustment units 61 and 63 to be used by the first antenna.
- the second and fourth impedances have frequency characteristics such that only the current signal in the frequency band used by the impedance adjustment units 62 and 64 for the second antenna can pass.
- the 1st impedance adjustment part 61 and the 3rd impedance adjustment part 63 are comprised as a filter which lets the frequency band used with a 1st antenna pass.
- the second impedance adjustment unit 62 and the fourth impedance adjustment unit 64 are configured as filters that pass a frequency band used in the second antenna.
- the first impedance adjustment unit 61 and the third impedance adjustment unit 63 are configured as filters that pass the frequency band used by the first antenna, and the second impedance adjustment unit 62 and the fourth impedance are provided. Since the adjustment unit 64 is configured as a filter that passes a frequency band used by the second antenna, power is supplied from the first power supply unit 14 to the first ground 15 or the second power supply unit 16. Therefore, it is possible to prevent power from being supplied to the second ground 17.
- power can be supplied from the second power supply unit 16 to the first ground 15 via the third impedance adjustment unit 63, the transmission line, and the first impedance adjustment unit 61.
- the first ground 15, that is, the first housing 11 can be operated as the first antenna.
- power can be supplied from the first power supply unit 14 to the second ground 17 via the second impedance adjustment unit 62, the transmission line, and the fourth impedance adjustment unit 64.
- the ground 17 is excited, and the second ground 17, that is, the second housing 12, can be operated as the second antenna.
- the first antenna and the second antenna can be suitably operated in different frequency bands (communication systems).
- the configuration of the transmission line in the housing connecting portion 13 can be simplified.
- the second antenna is compared with the deterioration of the antenna characteristics of the first antenna.
- the deterioration of the antenna characteristics is small.
- the second housing 12 is held by hand, the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when one of the first casing 11 and the second casing 12 is held by hand, the deterioration of the total antenna characteristics can be reduced by using, for example, diversity. It becomes possible.
- the mobile phone 60 even when the first casing 11 or the second casing 12 is held by hand in a configuration having the first antenna and the second antenna using casing excitation, It becomes possible to reduce the deterioration of the antenna characteristics.
- the first impedance adjustment unit 61, the second impedance adjustment unit 62, the third impedance adjustment unit 63, and the fourth impedance adjustment unit 64 are not limited to filters that pass a predetermined frequency band as described above.
- the filter may be configured to cut a predetermined frequency band.
- the first impedance adjustment unit 61 and the third impedance adjustment unit 63 are configured as filters that cut the frequency band used by the second antenna, and the second impedance adjustment unit 62 and the fourth impedance adjustment unit.
- Reference numeral 64 may be configured as a filter that cuts a frequency band used in the first antenna.
- the first impedance adjustment unit 61 and the second impedance adjustment unit 62 are provided in the first housing 11, and the third impedance adjustment unit 63 and the fourth impedance adjustment unit 64 are Although provided in the second housing 12, the present invention is not limited to this. That is, the first branch point 65 may be disposed in either the first casing 11 or the casing connecting portion 13, and the second branch point 66 is the second casing 12 or the casing. It may be arranged in any of the connecting portions 13. Therefore, if the first impedance adjustment unit 61 is on a path where the first ground 15 is electrically connected to the first branch point 65, the first casing 11 and the casing coupling unit 13 It may be arranged in either.
- the second impedance adjustment unit 62 is connected to either the first casing 11 or the casing coupling unit 13. It may be arranged.
- the third impedance adjusting unit 63 is connected to either the second casing 12 or the casing connecting unit 13 as long as the second feeding unit 16 is on a path electrically connected to the second branch point 66. It may be arranged.
- the fourth impedance adjusting unit 64 is disposed in either the second housing 12 or the housing connecting portion 13 as long as the second ground 17 is on a path that is electrically connected to the second branch point 66. May be.
- first branch point 65 and the second branch point 66 may be configured simply by branching an electric wire, or may be configured using a changeover switch (not shown).
- first branch point 65 is a changeover switch (first changeover switch) that switches the connection destination of the first terminal of the transmission line between the first power supply unit 14 and the first ground 15.
- the second branch point 66 may be a changeover switch (second changeover switch) that switches the connection destination of the second terminal of the transmission line between the second power feeding unit 16 and the second ground 17. it can.
- the impedance of each of the impedance adjustment units 61 to 64 is set to the same frequency characteristic, and the first antenna and the second antenna can be operated at the same frequency by switching the first changeover switch and the second changeover switch. It becomes possible.
- the impedance adjustment units 61 to 64 it is not always necessary to provide the impedance adjustment units 61 to 64. That is, in the configuration of the mobile phone 60 described above, in the configuration excluding the first impedance adjustment unit 61, the second impedance adjustment unit 62, the third impedance adjustment unit 63, and the fourth impedance adjustment unit 64, A configuration including a first changeover switch and a second changeover switch is possible. According to this configuration, the first antenna and the second antenna can be operated at either the same frequency or different frequencies by switching between the first changeover switch and the second changeover switch.
- FIG. 11 is a schematic diagram showing a configuration example of the mobile phone 70 of the present embodiment.
- the cellular phone 70 (portable wireless device) of the present embodiment is configured by replacing the configuration of the cellular phone 10 of the first embodiment with the first casing 11 and the second casing 12. Further, it is constituted by a single casing 71 and the casing connecting portion 13 is omitted.
- a first wireless circuit in which the first ground 15 provides a reference potential and a second wireless circuit in which the second ground 17 provides a reference potential are provided.
- the first ground 15 and the second ground 17 are arranged at a certain distance (at least a distance that is not capacitively coupled).
- the first power supply unit 14 is connected to the first radio circuit
- the second power supply unit 16 is connected to the second radio circuit.
- the first radio circuit and the second radio circuit are connected by a circuit connection unit 72 configured by a coaxial cable or the like.
- the first power supply unit 16 supplies power to the second ground 17 via the first transmission path
- the second power supply unit 16 supplies power to the first ground 15 via the second transmission path.
- each ground can be operated as an antenna.
- the shape of the first ground 15 and the shape of the second ground 17 are drawn in substantially the same shape, but the present embodiment is not limited to this, and the shape of the first ground 15. And the shape of the second ground 17 may be different.
- a shape like a mobile phone 70 ′ shown in FIG. 12 may be used.
- the portable wireless device includes a first power supply unit, a first ground that provides a reference potential to the first power supply unit, a second power supply unit, and a reference to the second power supply unit.
- a second ground for providing a potential for providing a potential
- a first transmission line for electrically connecting the first power feeding unit and the second ground
- an electrical connection between the second power feeding unit and the first ground is not necessarily provided.
- FIG. 13 is a schematic diagram showing a configuration example of the mobile phone 80 of the present embodiment.
- FIG. 13A is a perspective view showing a schematic configuration of the mobile phone 80
- FIG. 13B is a cross-sectional view of the mobile phone 80.
- the cellular phone 80 (portable wireless device) according to the present embodiment is connected to the mobile phone 10 according to the first embodiment in a rotatable manner by a housing coupling portion 13.
- the first casing 81 and the second casing slidably connected with a casing connecting portion (not shown) such as a guide rail interposed therebetween.
- a housing 82 is provided.
- a guide rail 84 a (housing connecting portion 84) is provided along the longitudinal direction on the surface of the first housing 81 that faces the second housing 82.
- the first casing 81 can slide with respect to the second casing 82 by biting the claws 84 b (the casing connecting portion 84) provided in the casing 82.
- the structure of the housing connecting portion is not limited to this, and a slide mechanism of a portable wireless device having a general slide structure can be applied.
- the wireless circuit housed in the first housing 81 and the wireless circuit housed in the second housing 82 are connected by a housing connection portion 83.
- the housing connection unit 83 is configured so that the connection between the housings is established even when the first housing 81 slides with respect to the second housing 82. It can be constituted by a flexible printed circuit or the like.
- the cellular phone 80 according to the present embodiment is different from the cellular phone 10 according to the first embodiment only in the connection structure between the first casing 81 and the second casing 82. 10, the first power feeding unit 16 feeds the second ground 17 through the first transmission path, and the second power feeding unit 16 feeds the first ground 15 through the second transmission path. By supplying power, each ground can be operated as an antenna.
- the connection state of at least one of the first transmission path and the second transmission path may be switched according to the opening / closing of the housing.
- the first transmission path and the second transmission path are connected in a direct current or capacitive manner.
- the housing is closed (the first housing 81 and the second housing 82 overlap), the first transmission path and the second transmission path are disconnected.
- wireless circuit can be reduced.
- the portable wireless device of the present invention is based on the first power supply unit, the first ground that provides the reference potential to the first power supply unit, the second power supply unit, and the second power supply unit.
- a second ground for providing a potential a first transmission line for electrically connecting the first power supply unit and the second ground; and a second power supply unit and the first ground.
- a second transmission line that is electrically connected is provided.
- a 1st ground is excited and a 1st ground is operated as an antenna element (1st antenna).
- the second ground can be excited and the second ground can be operated as an antenna element (second antenna).
- the second antenna is compared with the deterioration of the antenna characteristics of the first antenna.
- the deterioration of the antenna characteristics is small.
- the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when one of the vicinity of the first ground and the vicinity of the second ground is held by hand, the deterioration of the total antenna characteristics can be reduced by using, for example, diversity. It becomes possible.
- the portable wireless device in the configuration having the first antenna and the second antenna by feeding the ground, it is possible to reduce the deterioration of the antenna characteristics even when the vicinity of the ground is held by hand. It becomes.
- the portable wireless device of the present invention includes a first casing, a second casing, and a casing connecting portion that connects the first casing and the second casing.
- the one power feeding unit and the first ground are provided in the first housing, the second power feeding unit and the second ground are provided in the second housing, It is preferable that the first transmission line and the second transmission line are provided in the housing connecting portion.
- the antenna it becomes possible to reduce the deterioration of characteristics. That is, by supplying power to the first ground from the second power supply unit, the first ground (for example, the ground pattern of the board built in the first housing, the frame of the first housing, etc.) It is possible to operate the first ground, that is, the first housing as an antenna element (first antenna).
- the second ground for example, the ground pattern of the board built in the second housing, the frame of the second housing, etc.
- the second ground, that is, the second housing can be operated as an antenna element (second antenna).
- the second antenna is not compared with the deterioration of the antenna characteristics of the first antenna.
- the degradation of antenna characteristics is small.
- the second housing is held by hand, the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when either the first housing or the second housing is held by hand, it is possible to reduce the deterioration of the total antenna characteristics, particularly by using diversity, for example. Become.
- the portable wireless device of the present invention may be configured such that the first casing and the second casing are rotatable about the casing connecting portion.
- the portable wireless device of the present invention may be configured such that the first casing and the second casing are slidable with the casing connecting portion interposed therebetween.
- the portable wireless device of the present invention can be suitably configured as a portable wireless device having a folding structure or a slide structure, for example.
- the portable wireless device of the present invention is provided on a path where the first ground is electrically connected to the second power feeding unit, a first impedance adjusting unit having a first impedance,
- the second ground is preferably further provided with a second impedance adjusting unit having a second impedance provided on a path electrically connected to the first power feeding unit.
- At least one of the first impedance and the second impedance is a variable impedance.
- the impedance value it is possible to switch the reception frequency depending on the system used and the channel used.
- At least one of the first transmission line and the second transmission line is configured to connect the input source and the output destination by capacitive coupling in a high frequency manner. Is preferred. As a result, it is possible to form a feed line even in a structure in which a direct connection cannot be ensured.
- the portable wireless device of the present invention may be configured such that at least one of the first transmission line and the second transmission line is configured to connect the input source and the output destination in a DC manner. it can.
- the portable wireless device of the present invention is configured such that one of the first transmission line and the second transmission line is configured to connect the input source and the output destination in a high frequency capacitively coupled manner.
- the portable wireless device of the present invention also provides a reference potential to the first power supply unit, the first ground that provides a reference potential to the first power supply unit, the second power supply unit, and the second power supply unit. And a transmission line having a first terminal and a second terminal, wherein the first terminal of the transmission line is between the first terminal and the second terminal. Are electrically connected to the first power feeding unit and the first ground, respectively, via a first branch point arranged at the first branch point, and the second terminal of the transmission line is connected to the first branch point. And the second power supply unit and the second ground may be electrically connected to each other through a second branch point arranged between the second terminal and the second terminal. .
- the first antenna and the second antenna can be suitably operated in either the same or different frequency bands.
- the configuration of the transmission line can be simplified.
- the second antenna is compared with the deterioration of the antenna characteristics of the first antenna.
- the deterioration of the antenna characteristics is small.
- the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when one of the vicinity of the first ground and the vicinity of the second ground is held by hand, the deterioration of the total antenna characteristics can be reduced by using, for example, diversity. It becomes possible.
- the portable wireless device in the configuration having the first antenna and the second antenna by feeding the ground, it is possible to reduce the deterioration of the antenna characteristics even when the vicinity of the ground is held by hand. It becomes.
- the portable wireless device of the present invention includes a first casing, a second casing, and a casing connecting portion that connects the first casing and the second casing.
- the one power feeding unit and the first ground are provided in the first housing, the second power feeding unit and the second ground are provided in the second housing,
- One of the transmission lines is provided in the casing connecting portion, and the first branch point is disposed in one of the first casing and the casing connecting portion.
- the second branch point is preferably arranged in one of the second casing and the casing connecting portion.
- the antenna in the configuration having the first antenna and the second antenna using the case excitation, even if the first case or the second case is held by hand, the antenna It becomes possible to reduce the deterioration of characteristics. That is, according to the above configuration, power is fed from the first power feeding section to the first ground by separating the signals by impedance having frequency characteristics or by switching the signals by the changeover switch. It is possible to prevent power supply from the second power supply unit to the second ground.
- the first ground for example, the ground pattern of the substrate built in the first housing
- the first ground that is, the first housing
- the first ground can be operated as an antenna element (first antenna).
- the second ground for example, the ground pattern of the substrate incorporated in the second housing
- the second ground for example, the second casing
- the first antenna and the second antenna can be suitably operated in either the same or different frequency bands.
- the configuration of the transmission line in the housing connecting portion can be simplified.
- the second antenna is not compared with the deterioration of the antenna characteristics of the first antenna.
- the degradation of antenna characteristics is small.
- the second housing is held by hand, the deterioration of the antenna characteristics of the first antenna is small compared to the deterioration of the antenna characteristics of the second antenna. Therefore, even when either the first housing or the second housing is held by hand, it is possible to reduce the deterioration of the total antenna characteristics, particularly by using diversity, for example. Become.
- the portable wireless device of the present invention may be configured such that the first casing and the second casing are rotatable about the casing connecting portion.
- the portable wireless device of the present invention may be configured such that the first casing and the second casing are slidable with the casing connecting portion interposed therebetween.
- the portable wireless device of the present invention can be suitably configured as a portable wireless device having a folding structure or a slide structure, for example.
- the portable wireless device of the present invention includes a first impedance adjustment unit having a first impedance provided on a path where the first ground is electrically connected to the first branch point; A second impedance adjusting unit having a second impedance provided on a path where the first power feeding unit is electrically connected to the first branch point; and A third impedance adjusting unit having a third impedance provided on a path electrically connected to the second branch point, and the second ground is electrically connected to the second branch point. And a fourth impedance adjusting unit having a fourth impedance provided on the path.
- a frequency at which only the current signal in the frequency band used by the first antenna can be passed through the first and third impedances by the first and third impedance adjustment units.
- the second and fourth impedances have frequency characteristics that allow only the current signal in the frequency band used by the second antenna to be passed by the second and fourth impedance adjusters. By doing so, it is possible to prevent power supply from the first power supply unit to the first ground and power supply from the second power supply unit to the second ground.
- the first branch point is a first switch that switches a connection destination of the first terminal of the transmission line between the first power feeding unit and the first ground.
- the second branch point is a second switch that switches the connection destination of the second terminal of the transmission line between the second power feeding unit and the second ground. Preferably there is.
- At least one of the first impedance, the second impedance, the third impedance, and the fourth impedance is a variable impedance.
- the impedance value it is possible to switch the reception frequency depending on the system used and the channel used.
- the transmission line has a configuration in which the first terminal and the second terminal are connected by high frequency capacitive coupling. As a result, it is possible to form a feed line even in a structure in which a direct connection cannot be ensured.
- the portable wireless device of the present invention may be configured such that the transmission line is configured to connect the first terminal and the second terminal in a DC manner.
- connection state of at least one of the transmission lines is switched according to the positional relationship between the first casing and the second casing. May be.
- the connection state of at least one of the transmission lines with the terminal can be switched, for example, the first casing and the second casing overlap, and the storability is better than the operability of the portable wireless device.
- the position relationship is prioritized (when the housing is in a closed state)
- the current flowing to the ground (antenna) is suppressed by setting the connection state in at least one of the transmission lines to the non-connection state. The influence on other antennas can be reduced.
- the first power feeding unit is connected to a first radio circuit used in the first frequency band
- the second power feeding unit is connected to the first frequency.
- the second radio circuit used in a second frequency band different from the band, the length of the first ground in the short direction and a quarter of the wavelength of the second frequency band; Is smaller than the difference between the length in the short direction of the second ground and the quarter of the wavelength of the first frequency band
- the second power feeding unit The difference between the length of the first ground in the short direction and the quarter of the wavelength of the second frequency band is the second ground. If the difference between the length in the short direction and the quarter of the wavelength in the first frequency band is not less than Or it may be connected to the ends of the lateral direction in the second ground.
- the electrical length from the feeding portion to the ground end in the longitudinal direction or the short direction is ⁇ / 4.
- the first antenna and the second antenna are used, the currents flowing through the first ground and the second ground can be orthogonal to each other to reduce the coupling amount between the two antennas. It is possible to suppress deterioration due to the influence of the above and secure good antenna characteristics.
- the present invention can be suitably used in a field related to a portable wireless device having an antenna using case excitation, and a field related to a manufacturing method of a portable wireless device, a communication method of the portable wireless device, an antenna control method, Can be suitably used.
Abstract
Description
本発明の一実施形態について図面に基づいて説明すれば、以下の通りである。
図1は、本実施の形態の携帯電話機10の一構成例を示す模式図である。
上記構成を有する携帯電話機10は、第一の筐体11をアンテナ素子として動作させるとともに、第二の筐体12をアンテナ素子として動作させることが可能となっている。次に、図1を参照しながら、上記アンテナ素子として動作する原理について説明する。但し、以下の説明は、セット縦方向(図1の携帯電話機10の長手方向)が、セット横方向(図1の携帯電話機10の短手方向)に対して、使用周波数のλ/4に近い場合について述べている。
次に、携帯電話機10における筐体への給電方法について説明する。携帯電話機10においては、例えば、容量給電および直接給電などの給電方法を用いることができる。
図2は、容量給電が適用された携帯電話機10における、筐体連結部13付近の一構成例を示す模式図であり、(a)は開状態で正面から見たときを示し、(b)は開状態での側面の断面を示す。
図3は、直接給電が適用された携帯電話機10における、筐体連結部13付近の一構成例を示す模式図であり、(a)は開状態で正面から見たときを示し、(b)は筐体連結部13付近の構造を拡大して示す。
上述のように、携帯電話機10では、第一の筐体11が第一のアンテナとして動作し、第二の筐体12が第二のアンテナとして動作する。そこで、次に、携帯電話機10における、第一のアンテナおよび第二のアンテナを用いた通信システムについて説明する。
以上では、主に、両アンテナ(第一のアンテナおよび第二のアンテナ)を受信系のアンテナとして使用することを前提に説明を行ったが、本発明はこれに限定されない。例えば、少なくとも一方のアンテナ(第一のアンテナまたは第二のアンテナ)を送信系または送受信系のアンテナとして使用してもよい。
本発明の他の実施の形態について図面に基づいて説明すれば、以下の通りである。なお、本実施の形態において説明すること以外の構成(変形例を含む)は、前記実施の形態1と同じである。また、説明の便宜上、前記の実施の形態1の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。
本発明の他の実施の形態について図面に基づいて説明すれば、以下の通りである。なお、本実施の形態において説明すること以外の構成は、前記実施の形態1、2と同じである。また、説明の便宜上、前記の実施の形態1、2の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。
本発明のさらに他の実施の形態について図面に基づいて説明すれば、以下の通りである。なお、本実施の形態において説明すること以外の構成(変形例を含む)は、前記実施の形態1~3と同じである。また、説明の便宜上、前記の実施の形態1~3の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。
本発明の別の実施の形態について図面に基づいて説明すれば、以下の通りである。なお、本実施の形態において説明すること以外の構成(変形例を含む)は、前記実施の形態1~4と同じである。また、説明の便宜上、前記の実施の形態1~4の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。
以上のように、本発明の携帯無線機は、第一の給電部、上記第一の給電部に基準電位を提供する第一のグランド、第二の給電部、上記第二の給電部に基準電位を提供する第二のグランド、上記第一の給電部と上記第二のグランドとを電気的に接続する第一の伝送線路、および、上記第二の給電部と上記第一のグランドとを電気的に接続する第二の伝送線路を備えていることを特徴としている。
11、81 第一の筐体
12、82 第二の筐体
13、84 筐体連結部
14 第一の給電部
15 第一のグランド
16 第二の給電部
17 第二のグランド
21、83 筐体接続部
22 第一の給電パッド
23 第二の給電パッド
24 導体
30A 通信システム
30B 通信システム
31 第一のアンテナ
32 第二のアンテナ
34 チューナ
43 第一のチューナ
44 第二のチューナ
51 第一のインピーダンス調整部
52 第二のインピーダンス調整部
61 第一のインピーダンス調整部
62 第二のインピーダンス調整部
63 第三のインピーダンス調整部
64 第四のインピーダンス調整部
65 第一の分岐点
66 第二の分岐点
71 筐体
72 回路接続部
Claims (20)
- 第一の給電部、
上記第一の給電部に基準電位を提供する第一のグランド、
第二の給電部、
上記第二の給電部に基準電位を提供する第二のグランド、
上記第一の給電部と上記第二のグランドとを電気的に接続する第一の伝送線路、および
上記第二の給電部と上記第一のグランドとを電気的に接続する第二の伝送線路を備えていることを特徴とする携帯無線機。 - 第一の筐体、第二の筐体、および、上記第一の筐体と上記第二の筐体とを連結する筐体連結部を備えており、
上記第一の給電部および上記第一のグランドは、上記第一の筐体に設けられており、
上記第二の給電部および上記第二のグランドは、上記第二の筐体に設けられており、
上記第一の伝送線路および上記第二の伝送線路は、上記筐体連結部に設けられていることを特徴とする請求項1に記載の携帯無線機。 - 上記第一の筐体と上記第二の筐体とが上記筐体連結部を軸として回動自在に構成されていることを特徴とする請求項2に記載の携帯無線機。
- 上記第一の筐体と上記第二の筐体とが上記筐体連結部を挟んで摺動自在に構成されていることを特徴とする請求項2に記載の携帯無線機。
- 上記第一のグランドが上記第二の給電部に電気的に接続される経路上に設けられた、第一のインピーダンスを有する第一のインピーダンス調整部と、
上記第二のグランドが上記第一の給電部に電気的に接続される経路上に設けられた、第二のインピーダンスを有する第二のインピーダンス調整部とをさらに備えていることを特徴とする請求項1~4のいずれか1項に記載の携帯無線機。 - 上記第一のインピーダンスおよび上記第二のインピーダンスの少なくともいずれか一方は、可変インピーダンスであることを特徴とする請求項5に記載の携帯無線機。
- 上記第一の伝送線路および上記第二の伝送線路の少なくともいずれか一方は、入力元と出力先とを高周波的に容量結合にて接続する構成からなることを特徴とする請求項1~6のいずれか1項に記載の携帯無線機。
- 上記第一の伝送線路および上記第二の伝送線路の少なくともいずれか一方は、入力元と出力先とを直流的に接続する構成からなることを特徴とする請求項1~6のいずれか1項に記載の携帯無線機。
- 上記第一の伝送線路および上記第二の伝送線路のうち、一方は入力元と出力先とを高周波的に容量結合にて接続する構成からなり、他方は入力元と出力先とを直流的に接続する構成からなることを特徴とする請求項1~6のいずれか1項に記載の携帯無線機。
- 第一の給電部、
上記第一の給電部に基準電位を提供する第一のグランド、
第二の給電部、
上記第二の給電部に基準電位を提供する第二のグランド、ならびに、
第一の端子および第二の端子を有する伝送線路を備えており、
上記伝送線路の第一の端子は、上記第一の端子と上記第二の端子との間に配置された第一の分岐点を介して、上記第一の給電部と上記第一のグランドとにそれぞれ電気的に接続され、
上記伝送線路の第二の端子は、上記第一の分岐点と上記第二の端子との間に配置された第二の分岐点を介して、上記第二の給電部と上記第二のグランドとにそれぞれ電気的に接続されていることを特徴とする携帯無線機。 - 第一の筐体、第二の筐体、および、上記第一の筐体と上記第二の筐体とを連結する筐体連結部を備えており、
上記第一の給電部および上記第一のグランドは、上記第一の筐体に設けられており、
上記第二の給電部および上記第二のグランドは、上記第二の筐体に設けられており、
上記伝送線路は、上記筐体連結部に1つ設けられており、
上記第一の分岐点は、上記第一の筐体および上記筐体連結部のいずれか一方に配置されており、
上記第二の分岐点は、上記第二の筐体および上記筐体連結部のいずれか一方に配置されていることを特徴とする請求項10に記載の携帯無線機。 - 上記第一の筐体と上記第二の筐体とが上記筐体連結部を軸として回動自在に構成されていることを特徴とする請求項11に記載の携帯無線機。
- 上記第一の筐体と上記第二の筐体とが上記筐体連結部を挟んで摺動自在に構成されていることを特徴とする請求項11に記載の携帯無線機。
- 上記第一のグランドが上記第一の分岐点に電気的に接続される経路上に設けられた、第一のインピーダンスを有する第一のインピーダンス調整部と、
上記第一の給電部が上記第一の分岐点に電気的に接続される経路上に設けられた、第二のインピーダンスを有する第二のインピーダンス調整部と、
上記第二の給電部が上記第二の分岐点に電気的に接続される経路上に設けられた、第三のインピーダンスを有する第三のインピーダンス調整部と、
上記第二のグランドが上記第二の分岐点に電気的に接続される経路上に設けられた、第四のインピーダンスを有する第四のインピーダンス調整部とをさらに備えていることを特徴とする請求項10~13のいずれか1項に記載の携帯無線機。 - 上記第一の分岐点は、上記伝送線路の第一の端子の接続先を、上記第一の給電部と上記第一のグランドとの間で切り替える第一の切替スイッチであり、
上記第二の分岐点は、上記伝送線路の第二の端子の接続先を、上記第二の給電部と上記第二のグランドとの間で切り替える第二の切替スイッチであることを特徴とする請求項10~13のいずれか1項に記載の携帯無線機。 - 上記第一のインピーダンス、上記第二のインピーダンス、上記第三のインピーダンス、および上記第四のインピーダンスの少なくともいずれか一つは、可変インピーダンスであることを特徴とする請求項14に記載の携帯無線機。
- 上記伝送線路は、上記第一の端子と上記第二の端子とを高周波的に容量結合にて接続する構成からなることを特徴とする請求項10~16のいずれか1項に記載の携帯無線機。
- 上記伝送線路は、上記第一の端子と上記第二の端子とを直流的に接続する構成からなることを特徴とする請求項10~16のいずれか1項に記載の携帯無線機。
- 上記伝送線路の少なくとも何れかは、上記第一の筐体と上記第二の筐体との間の位置関係に応じて、接続状態が切り替わるようになっていることを特徴とする請求項3、4、12または13に記載の携帯無線機。
- 上記第一の給電部は、第一の周波数帯で使用される第一の無線回路に接続されており、
上記第二の給電部は、第一の周波数帯とは異なる第二の周波数帯で使用される第ニの無線回路に接続されており、
上記第一のグランドの短手方向の長さと上記第二の周波数帯の波長の4分の1との差が、上記第二のグランドの短手方向の長さと上記第一の周波数帯の波長の4分の1との差よりも小さい場合には、上記第二の給電部は、上記第一のグランドにおける短手方向の端部に接続されており、
上記第一のグランドの短手方向の長さと上記第二の周波数帯の波長の4分の1との差が、上記第二のグランドの短手方向の長さと上記第一の周波数帯の波長の4分の1との差以上である場合には、上記第一の給電部は、上記第二のグランドにおける短手方向の端部に接続されていることを特徴とする請求項1~19のいずれか1項に記載の携帯無線機。
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US20130009849A1 (en) | 2013-01-10 |
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