WO2010146739A1 - アンテナ装置及びこれを搭載した携帯無線端末 - Google Patents
アンテナ装置及びこれを搭載した携帯無線端末 Download PDFInfo
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- WO2010146739A1 WO2010146739A1 PCT/JP2010/001159 JP2010001159W WO2010146739A1 WO 2010146739 A1 WO2010146739 A1 WO 2010146739A1 JP 2010001159 W JP2010001159 W JP 2010001159W WO 2010146739 A1 WO2010146739 A1 WO 2010146739A1
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- circuit board
- short
- circuit
- metal
- casing
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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
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/40—Element having extended radiating surface
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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
Definitions
- the present invention relates to an antenna device having a wide bandwidth and high call performance, and having a small change in radiation characteristics when opened and closed, and a foldable portable wireless terminal equipped with the antenna device.
- an antenna mounted on a mobile phone is required to be a multiband broadband antenna that has high gain and supports a plurality of frequency bands without impairing design.
- the structure of mobile phones in recent years is complicated, and the structure changes according to the usage pattern. For example, in addition to the conventional opening / closing operation, there is a side-opening state that opens sideways, and the antenna characteristics are in all states. A stable and high radiation characteristic is required without being damaged.
- a feeding element having a predetermined element length is connected to a metal hinge portion to operate as a broadband antenna.
- a new antenna is provided by supplying power to a metal hinge and operating as an antenna that resonates in a single frequency band.
- the antenna mounting area can be reduced without providing an element.
- Patent Document 1 in order to ensure wideband characteristics, it is necessary to connect another element that resonates in a desired frequency band in the vicinity by connecting to a metallic hinge, and around the hinge.
- the complexity of the structure is likely to be impaired because the structure of the device is complex and difficult to miniaturize, and recently there has been a tendency to emphasize design as a reason for purchasing mobile phones and the like. Therefore, high cost can be considered.
- the present invention has been made in view of the above-described circumstances, and the object thereof is to obtain a wideband characteristic of an antenna, enable a thin and small casing, and is high according to various usage conditions.
- the present invention provides a foldable portable wireless device capable of exhibiting call performance.
- the portable wireless device of the present invention includes a first housing in which a first circuit board is disposed, a second housing in which a second circuit board is disposed, the first housing, and the second housing.
- a first metal rotary shaft having conductivity, a power supply unit connected to the first metal rotary shaft, and the first metal unit connected to the power supply unit.
- the first metal rotating shaft is disposed at a predetermined interval and is electrically connected to the power supply unit, and the first metal rotation shaft has a first frequency band and a second frequency higher than the first frequency band.
- the diameter of the cross-sectional area of the first metal rotation axis is set to a wavelength corresponding to the second frequency band.
- the wavelength is 1/20 wavelength or more and the first casing and the second casing are closed, the first metal rotating shaft and the ground pattern on the second circuit board have a casing thickness. It is preferable not to oppose in the direction.
- the axial center of the first metal rotation shaft may be positioned on the first casing side.
- a third circuit board is provided on the first metal rotating shaft side in the second casing, the second circuit board and the third circuit board are connected via a reactance element, When the first casing and the second casing are closed, the ground pattern of the third circuit board may face the first metal rotation shaft in the casing thickness direction.
- first casing and the second casing are connected to be freely rotatable in an axial direction orthogonal to the axial direction of the first metal rotating shaft, and have a conductive second metal rotating shaft. It is preferable that the first metal rotating shaft and the second metal rotating shaft are arranged at a predetermined interval. With this configuration, it is possible to ensure good communication performance even for portable wireless terminals that change to various usage styles.
- the first metal rotary shaft and the first circuit board are spaced apart from each other by a predetermined distance, and a short-circuit element is provided substantially in parallel with the first metal rotary shaft. It is preferable to short-circuit to a ground pattern on the first circuit board in the vicinity. With this configuration, further broadband characteristics can be secured, and good communication performance can be secured.
- the one end of the short-circuit element may be short-circuited to the ground pattern on the first circuit board in the vicinity of the power feeding unit via a reactance element.
- the short-circuit element has a predetermined length from a surface facing the adjacent surface of the first housing and the second housing when the first housing and the second housing are closed.
- positioned at intervals may be sufficient. With this configuration, even when the portable wireless terminal is placed on a metallic desk, good communication performance can be ensured.
- a metal shield for blocking unnecessary radiation of the wireless circuit is provided, and a first short-circuit contact of the metal shield is short-circuited to a ground pattern on the first circuit board in the vicinity of the power feeding unit, and a second short-circuit
- the contact may be arranged with an interval of about 1 ⁇ 2 wavelength of the wavelength corresponding to the high frequency band with respect to the first short-circuit contact, and short-circuited to the ground pattern on the first circuit board.
- the portable wireless terminal of the present invention broadband characteristics can be obtained, the casing can be thinned and miniaturized, and high call performance can be exhibited according to various usage conditions.
- (A) is the front view of the state which opened the foldable mobile telephone 10 in the 1st Embodiment of this invention
- (b) is the state which opened the foldable mobile telephone 10 in the 1st Embodiment of this invention.
- (C) is a right side view of the folding cellular phone 10 in the first embodiment of the present invention in a closed state The perspective view which shows the structure of the metal rotating shaft 14 which concerns on the 1st Embodiment of this invention.
- (A) is a right side view of the state in which the folding cellular phone 10 in the first embodiment of the present invention is closed
- (b) is the diameter of the cross-sectional area of the metal rotating shaft 14 in the first embodiment of the present invention.
- FIG. 1 The figure which shows the VSWR characteristic with respect to the change of L1
- A The right view of the state which closed the foldable mobile telephone 10 in the 1st Embodiment of this invention, (b) closed the foldable mobile telephone 10 in the 1st Embodiment of this invention.
- interval D2 of the metal rotating shaft 14 and 2nd circuit board 12A in a state is shown.
- A) is the front view of the state which opened the foldable mobile telephone 20 in the 2nd Embodiment of this invention
- (b) is the state which closed the foldable mobile telephone 20 in the 2nd Embodiment of this invention.
- Right side view (A) is the front view of the state which opened the folding mobile telephone 30 in the 3rd Embodiment of this invention to the vertical direction
- (b) is the folding mobile telephone 30 in the 2nd Embodiment of this invention.
- Left side view with the door open vertically is the front view of the state which opened the foldable mobile telephone 30 in the 3rd Embodiment of this invention in the horizontal direction
- (b) is the foldable mobile telephone 30 in the 2nd Embodiment of this invention.
- Left side view with sideways open (A) is the front view of the state which opened the foldable mobile telephone 40 in the 4th Embodiment of this invention
- (b) is the state which opened the foldable mobile telephone 40 in the 4th Embodiment of this invention.
- (C) is a right side view of the folding cellular phone 40 in the fourth embodiment of the present invention in a closed state
- (A) is a right side view of the state in which the foldable mobile phone 40 in the fourth embodiment of the present invention is closed
- (b) is a view in which the foldable mobile phone 40 in the fourth embodiment of the present invention is closed.
- the figure which shows the VSWR characteristic with respect to the presence or absence of a short circuit element in a state The front view of the state which opened the foldable mobile telephone 50 in the 5th Embodiment of this invention.
- the side view of the state which closed the folding type mobile telephone 60 in the 6th Embodiment of this invention The side view at the time of putting the folding type mobile telephone 60 in the 6th Embodiment of this invention on a metal desk
- FIG. 1 is a front view of a state in which a foldable mobile phone 10 in the first embodiment is opened
- FIG. 1B is a right side view of the state in which the foldable mobile phone 10 is opened in the first embodiment of the present invention
- FIG. 1C is a right side view of the state in which the foldable mobile phone 10 according to the first embodiment of the present invention is closed.
- a foldable mobile phone 10 shown in FIGS. 1A to 1C includes a lower housing 11 constituting a first housing, an upper housing 12 constituting a second housing, A conductive metal rotating shaft 14 in a hinge portion 13 that rotatably connects the housing 12 and the lower housing 11, a power supply spring 15, an impedance matching circuit 16, a wireless circuit 17, and a signal line 18 Is provided.
- the upper housing 12 includes a display unit (not shown) and a second circuit board (upper circuit board) 12A.
- the lower housing 11 includes an operation unit (not shown), a first circuit board (lower circuit board) 11A, the impedance matching circuit 16 and the wireless circuit 17 described above.
- the metal rotation shaft 14 rotatably connects the upper housing 12 and the lower housing 11, and as shown in FIG. 2, a metal rotation shaft fixing portion 141 fixed to the lower housing 11,
- the rotating part 142 of the metal rotating shaft fixed to the upper housing 12 and rotatably attached to the fixing part 141 of the metal rotating shaft, the fixing part 141 of the metal rotating shaft, and the rotating part 142 of the metal rotating shaft are electrically connected.
- the connecting portion 140 is connected and rotatably supported, and both are formed of a conductive material.
- the center of the metal rotation shaft 14 in the axial direction is arranged on the lower housing 11 side with respect to the thickness direction when the folding portable wireless terminal 10 is closed.
- the metal rotary shaft 14 is electrically connected to the impedance matching circuit 16 and the radio circuit 17 through the power supply spring 15.
- the power supply spring 15 serves as a power supply unit, and is electrically connected to one end of the metal rotating shaft 14, for example, a position about 1/5 of the length of the metal rotating shaft from the end of the metal rotating shaft.
- the impedance matching circuit 16 connected to the power supply spring 15 is disposed at an end portion near the metal rotating shaft 14 on the first circuit board 11A.
- the impedance matching circuit 16 matches the impedance to 50 ⁇ in the first operating frequency band f1 and the second operating frequency band f2, which is approximately twice the first operating frequency band f1.
- the diameter L1 of the cross-sectional area of the metal rotating shaft 14 is approximately 1/20 wavelength of the wavelength ⁇ 2 corresponding to the second operating frequency band f2. Further, the length L2 of the metal rotating shaft 14 is effective to resonate with the center frequency fc (wavelength is ⁇ c) of the second operating frequency band f2 by the cross-sectional area and the length L2 of the metal rotating shaft 14. It is desirable that the length is approximately 1 ⁇ 4 wavelength ( ⁇ c / 4).
- the distance D1 between the metal rotating shaft 14 and the first circuit board 11A is preferably about 1/25 or more of the wavelength ⁇ 2, and the distance D2 between the metal rotating shaft 14 and the second circuit board 12A is about 1/35 of the wavelength ⁇ 2. The above is desirable. Note that the distance D2 is the distance in the longitudinal direction between the metal rotating shaft 14 and the second circuit board 12A when the foldable mobile phone 10 is folded, and is not a linear distance.
- the metal rotating shaft 14 having a predetermined cross-sectional area is configured as an antenna that operates in two or more frequency bands.
- FIG. 3A is a right side view of the folded cellular phone 10 in the first embodiment of the present invention in a closed state
- FIG. 3B is a metal rotation in the first embodiment of the present invention. It is a figure which shows the VSWR characteristic with respect to the change of the diameter L1 of the cross-sectional area of the axis
- VSWR ⁇ 3 is defined as the antenna bandwidth.
- the operating frequency band for example, the first operating frequency band f1 is set from 830 M to 900 MHz, and the second frequency band f2 is set from 1.75 G to 2.15 GHz. Therefore, it is desirable that VSWR ⁇ 3 in the first operating frequency band f1 and the second operating frequency band f2.
- the length of L2 in each cross-sectional area is adjusted to a length that satisfies VSWR ⁇ 3 in the 1.75 GHz band.
- 3A and 3B show that the change in the second operating frequency band f2 is large depending on the cross-sectional area diameter L1, and the cross-sectional area diameter L1 is 1/20 wavelength ( ⁇ 2) or more. If so, VSWR ⁇ 3 can be satisfied in the operating frequency band. That is, the diameter L1 of the cross-sectional area needs to be 1/20 wavelength ( ⁇ 2) or more.
- FIG. 4A is a right side view of the state in which the foldable mobile phone 10 according to the first embodiment of the present invention is closed, and FIG. 4B is a fold according to the first embodiment of the present invention.
- the tatami-type mobile telephone 10 is a figure which shows the radiation efficiency characteristic with respect to the change of the space
- the distance D2 on the horizontal axis is the distance in the longitudinal direction between the metal rotating shaft 14 and the second circuit board 12A when folded, and the lower end of the metal rotating shaft 14 and the upper end of the second circuit board 12A are long.
- the radiation efficiency characteristic of the first operating frequency band f1 is indicated by a dotted line
- the radiation efficiency characteristic of the second operating frequency band f2 is indicated by a solid line.
- the distance D2 4 mm or less
- the radiation efficiency in the second operating frequency band f2 tends to deteriorate. Therefore, in order not to deteriorate the radiation efficiency, the distance D2 needs to be approximately 1/35 or more of the wavelength ⁇ 2.
- the diameter L1 of the cross-sectional area of the metal rotating shaft 14 is 1/20 of the wavelength ⁇ 2, and the distance D2 between the metal rotating shaft 14 and the second circuit board 12A is approximately 1/35 or more of the wavelength ⁇ 2.
- a matching circuit that feeds power to the metal rotating shaft 14 that allows the upper housing 12 and the lower housing 11 to rotate and operates as an antenna in two or more operating frequency bands.
- the metal rotating shaft 14 has a cross-sectional area diameter L1 of approximately 1/20 wavelength or more of the wavelength ⁇ 2 and an effective length of approximately ⁇ c / 4 wavelength.
- the distance D1 between the metal rotating shaft 14 and the first circuit board 11A is a wavelength.
- FIG. 5A is a front view showing a state in which the folding mobile phone 20 according to the second embodiment of the present invention is opened
- FIG. 5B is a folding view according to the second embodiment of the present invention. The right view of the state which closed the cellular phone 20 is shown.
- the difference between the foldable mobile phone 20 in FIGS. 5 (a) and 5 (b) and the foldable mobile phone 10 in FIGS. 1 (a) to 1 (c) is as follows.
- the third circuit board 21 is provided, and the third circuit board 21 and the second circuit board 12 ⁇ / b> A are connected via the reactance element 22.
- a ground pattern (not shown) of the third circuit board 21 and a ground pattern (not shown) of the second circuit board 12A are connected via a reactance element 22, and a signal line (not shown) of the second circuit board 12A is connected.
- a signal line (not shown) of the third circuit board 21 are connected via a reactance element 22.
- the component can also be mounted in the space of the upper casing 12 where the metal rotating shaft 14 of the second circuit board 12A is close. Necessary. In such a case, as shown in FIG. 4A and FIG. 4B of the first embodiment, there is a concern about deterioration of radiation efficiency depending on the distance D2.
- the ground pattern of the third circuit board 21 and the ground pattern of the second circuit board 12A are reduced in order to reduce deterioration in radiation efficiency when the third circuit board 21 is close to the metal rotating shaft 14.
- a reactance element 22 for example, a filter circuit for the first operating frequency band f1 and a filter circuit for the second operating frequency band f2 are arranged in series.
- the signal line of the third circuit board 21 and the signal line of the second circuit board 12A are connected to the reactance element 22, for example, the filter circuit for the first operating frequency band f1, the second operating frequency band.
- the filter circuit for f2 is connected through a circuit arranged in series.
- the filter circuits for the first operating frequency band f1 and the second operating frequency band f2 may be LC parallel resonant circuits, and need to be connected as a direct current in order to connect the signal lines.
- the reactance element 22 By loading the reactance element 22 in this way, the influence of the third circuit board 21 is reduced in the first operating frequency band f1 and the second operating frequency band f2, and the efficiency degradation can be suppressed to a low level.
- the third circuit board 21 and the second circuit board 12A in the upper casing 12 are connected via the reactance element 22 so that the upper casing close to the metal rotating shaft 14 is connected. Even if components are mounted in the space of the body 12 (third circuit board 21), the deterioration of radiation efficiency can be reduced, so that the component mounting area increases and the portable radio terminal can be downsized.
- FIG. 6A is a front view showing a state in which the folding cellular phone 30 according to the third embodiment of the present invention is opened in the vertical direction
- FIG. 6B is a third embodiment of the present invention.
- FIG. 7A is a left side view of a state in which the foldable mobile phone 30 is opened in the vertical direction
- FIG. 7A is a state in which the foldable mobile phone 30 in the third embodiment of the present invention is opened in the horizontal direction
- FIG. 7B is a left side view of the folding cellular phone 30 according to the third embodiment of the present invention when the folding cellular phone 30 is opened in the horizontal direction.
- the foldable mobile phone 30 has an upper casing 12 and a lower casing 11 that are arranged in the vertical direction (see FIG. 6A and FIG. 6B).
- a two-axis folding mobile phone that can be opened and closed in the left-right direction (lateral direction) shown in FIGS. 7A and 7B is configured.
- the upper casing 12, the lower casing 11, the hinge portion 13, and the metal rotary shaft for vertical opening (hereinafter referred to as “first metal rotary shaft”). ) 14 and a metal rotating shaft (hereinafter referred to as “second metal rotating shaft”) 31 constituting a second hinge for lateral opening.
- the second metal rotating shaft 31 is fixed to the lower metal rotating shaft fixing portion 311 and the second metal rotating shaft.
- the fixed portion 311 of the second metal rotating shaft is fixed to the hinge portion 13, and the rotating portion 313 of the second metal rotating shaft is fixed to the upper housing 12.
- the connecting portion 312 of the second metal rotating shaft constitutes an axis that relatively rotates the upper housing 12 and the lower housing 11 along a direction orthogonal to the rotating shaft of the first metal rotating shaft of the hinge portion 13.
- a second metal rotating shaft connecting portion 312 that rotatably supports the second metal rotating shaft fixing portion 311 and the second metal rotating shaft rotating portion 313.
- the second metal rotating shaft fixing portion 311, the second metal rotating shaft connecting portion 312, and the second metal rotating shaft rotating portion 313 are all formed of a conductive material. It is electrically connected to the rotating part 313 of the second metal rotating shaft.
- the distance D3 between the fixed portion 311 of the second metal rotating shaft and the rotating portion 142 of the first metal rotating shaft 14 is preferably 5 mm or more, for example.
- the first metal rotating shaft 14 operates as an antenna by arranging the axial direction of the second metal rotating shaft 31 and the axial direction of the first metal rotating shaft 14 orthogonal to each other, the first metal rotating shaft 14 is arranged. And the second metal rotating shaft 31 become weak in electromagnetic field coupling, and deterioration of radiation efficiency due to electromagnetic field coupling is suppressed.
- the second metal rotary shaft is provided and can be opened and closed in the horizontal direction (horizontal direction) in addition to the vertical direction (vertical direction).
- the axial direction of the second metal rotating shaft 31 and the axial direction of the first metal rotating shaft 14 are arranged orthogonally, and a predetermined interval is secured, so that the mobile phone changes in various styles.
- the first metal rotating shaft 14 operates as an antenna, good radiation characteristics can be ensured.
- the same parts as those in the first embodiment are denoted by the same reference numerals to avoid redundant description.
- FIG. 8A is a front view showing a state in which the foldable mobile phone 40 in the fourth embodiment of the present invention is opened, and FIG. 8B is a fold in the fourth embodiment of the present invention.
- FIG. 1C is a right side view of a state in which the foldable mobile phone 40 is closed in the fourth embodiment of the present invention.
- the short-circuit element 41 is provided between the metal rotation shaft 14 and the first circuit board 11A substantially in parallel with the metal rotation shaft 14, and one end of the short-circuit element 41 is connected to the power supply spring 15. A ground pattern on the nearby first circuit board 11A is grounded.
- the short-circuit element 41 keeps a predetermined interval from the ground pattern of the first circuit board 11A.
- the distance D4 between the short-circuit element 41 and the ground pattern of the first circuit board 11A is preferably maintained at an interval of 3 mm or more, for example.
- the element length of the short-circuit element 41 is slightly shortened from about 1 ⁇ 4 of the wavelength ⁇ m of the maximum frequency in the desired frequency band (second operating frequency band f2 in the present embodiment).
- FIG. 9A is a right side view showing a state in which the foldable mobile phone 40 according to the fourth embodiment of the present invention is closed
- FIG. 9B is a foldable type according to the fourth embodiment of the present invention. It is a figure which shows the VSWR characteristic with respect to the presence or absence of a short circuit element in the state of FIG.
- VSWR ⁇ 3 is defined as the antenna bandwidth. In the absence of the short-circuit element 41, a bandwidth of VSWR ⁇ 3 can be secured in the second frequency band of 1.75 G to 2.15 GHz.
- the bandwidth can be secured up to about 1.75 to 2.4 GHz.
- the length of the metal rotating shaft 14 used as an antenna is approximately 1 ⁇ 4 wavelength of the second operating frequency band f2, and therefore the antenna current is distributed on the first circuit board 11A, and the antenna current
- the short-circuit element 41 sets the length so as to resonate at a frequency slightly higher than the maximum frequency of the second operating frequency band f2 in the desired frequency band, thereby realizing a wide band. Further, by improving the VSWR characteristics in the 2 GHz band, the matching loss can be improved and the antenna gain can be increased.
- the short circuit element 41 is provided between the metal rotation shaft 14 and the first circuit board 11 ⁇ / b> A substantially in parallel with the metal rotation shaft 14, and one end of the short circuit element 41 is provided near the power supply spring 15.
- the ground pattern on the first circuit board 11A is grounded, and the element length of the short-circuit element 41 is slightly shortened from about 1 ⁇ 4 of the wavelength ⁇ m of the maximum frequency of the desired frequency band (second operating frequency band f2). As a result, a wider bandwidth can be realized, and good communication performance can be ensured.
- FIG. 10 is a front view showing a state in which the folding cellular phone 50 in the fifth embodiment of the present invention is opened.
- the short-circuit element 51 is provided between the metal rotation shaft 14 and the first circuit board 11 ⁇ / b> A substantially in parallel with the metal rotation shaft 14, and one end of the short-circuit element 51 is connected to the power supply spring 15.
- the ground pattern on the nearby first circuit board 11A is grounded via the reactance element 52.
- the short-circuit element 51 keeps a predetermined interval from the ground pattern of the first circuit board 11A.
- the distance D4 between the short-circuit element 51 and the ground pattern of the first circuit board 11A is preferably maintained at, for example, 3 mm or more.
- the reactance element 52 is, for example, an inductor, and in order to obtain the same performance as the short-circuit element 41 of the fourth embodiment, short-circuiting is performed.
- the element length of the element 51 can be set shorter than the short-circuit element 41 in the fourth embodiment.
- the reactance element 52 is loaded on the short-circuit end of the short-circuit element 51 and short-circuited, so that the element length of the short-circuit element is shortened compared to the short-circuit element 41 without the reactance element 52. Therefore, it is effective for miniaturization of a mobile phone.
- FIG. 11 is a side view showing a state in which the foldable mobile phone 60 in the sixth embodiment of the present invention is closed.
- the short-circuit element 61 is provided between the metal rotation shaft 14 and the first circuit board 11A substantially in parallel with the metal rotation shaft 14, and one end of the short-circuit element 61 is connected to the power supply spring 15. A ground pattern on the nearby first circuit board 11A is grounded.
- the short-circuit element 61 keeps a predetermined interval from the ground pattern of the first circuit board 11A.
- the short-circuit element 61 is kept at a predetermined interval with respect to a key surface (not shown) of the lower housing 11, that is, a surface facing the adjacent surfaces of the upper housing 12 and the lower housing 11 when folded. Deploy.
- FIG. 12 is a side view when the folding cellular phone 60 according to the sixth embodiment of the present invention is placed on a metal desk.
- the short-circuit element 61 is arranged at a predetermined interval, for example, an interval of about 2 mm, with respect to the surface of the lower housing 11 that faces the key surface.
- a predetermined interval for example, an interval of about 2 mm
- the influence of electromagnetic coupling is caused. It is assumed that the antenna gain deteriorates. In order to reduce the influence of this electromagnetic coupling, it is desirable to increase the distance between the metal desk 62 and the antenna.
- the short-circuit element 61 since the short-circuit element 61 resonates near the maximum frequency of the second operating frequency band f2 of the antenna of the metal rotating shaft 14, the short-circuit element 61 is spaced from the metal desk 62.
- the gain is improved. Therefore, by arranging the short-circuit element 61 as in the present embodiment, the gain of the frequency band that resonates with the short-circuit element 61 when placed on the metal desk 62 is 3 dB compared to the arrangement condition without a predetermined interval. The degree can be improved.
- the short-circuit element 61 is placed on the metal desk 62 or the like by disposing the short-circuit element 61 at a predetermined interval with respect to the surface opposite to the key surface of the lower housing 11, High radiation performance can be obtained, and good communication performance can be ensured.
- FIG. 13 is a front view showing a state in which the folding cellular phone 60 in the seventh embodiment of the present invention is opened.
- the foldable mobile phone 70 of this embodiment includes a shield case 71 for reducing unnecessary radiation from the radio circuit 17, and short-circuit contacts 72A and 72B between the shield case 71 and the ground pattern of the first circuit board 11A. , 72C.
- the short-circuit contact 72A of the shield case 71 is grounded to the ground pattern on the first circuit board 11A in the vicinity of the power supply spring 15, and an interval L3 between the short-circuit contact 72A, the short-circuit contact 72B, and the short-circuit contact 72C is set to a desired frequency band.
- the maximum frequency in the second operating frequency band f2) is approximately 1 ⁇ 2 of the wavelength ⁇ m.
- the shield case 71 has a role of suppressing radio radiation, and in order to obtain the effect, it is necessary to use a plurality of ground points in the ground pattern of the first circuit board 11A.
- the shield case 71 is used to perform a broadband operation similar to the short-circuit element 41 in FIG. 8A and FIG. 8B in the fourth embodiment, and is shared with the wireless shield. .
- the short-circuit contact 72A between the shield case 71 and the ground pattern of the first circuit board 11A is grounded to the ground pattern on the first circuit board 11A in the vicinity of the feeding spring 15;
- the other short-circuit contact 72B and short-circuit contact 72C are grounded at a position where the current distribution becomes maximum at the maximum frequency in the desired band, that is, approximately 1 ⁇ 2 of the wavelength ⁇ m of the maximum frequency in the desired band with a space from the short-circuit contact 72A.
- a wide band can be realized in substantially the same manner as the short-circuit element 41 of the fourth embodiment.
- the short-circuit contact 72A between the shield case 71 and the ground pattern of the first circuit board 11A is grounded to the ground pattern on the first circuit board 11A in the vicinity of the power supply spring 15, and the others. Since the short-circuit contact 72B and the short-circuit contact 72C are grounded at about half of the wavelength ⁇ m of the maximum frequency and spaced from the short-circuit contact 72A, a wide band can be realized and shared as a wireless shield. Since no other element is required as the short-circuit element, the mobile phone can be reduced in size and cost.
- the portable wireless device of the present invention can be made thin and small at the same time, and has an effect of exhibiting high call performance, and is useful for, for example, a foldable mobile phone.
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Abstract
Description
図1(a)~図1(c)は、本発明の携帯無線機の第1の実施形態に係る折畳式携帯電話機10を示すものであり、図1(a)は、本発明の第1の実施形態における折畳式携帯電話機10を開いた状態の正面図であり、図1(b)は、本発明の第1の実施形態における折畳式携帯電話機10を開いた状態の右側面図であり、図1(c)は、本発明の第1の実施形態における折畳式携帯電話機10を閉じた状態の右側面図である。
図3(a)は、本発明の第1の実施形態における折畳式携帯電話機10を閉じた状態の右側面図であり、図3(b)は本発明の第1の実施形態における金属回転軸14の断面積の直径L1の変化に対するVSWR特性を示す図である。一般的には、VSWR<3がアンテナの帯域幅として定義される。
図4(a)は、本発明の第1の実施形態における折畳式携帯電話機10を閉じた状態の右側面図であり、図4(b)は、本発明の第1の実施形態における折畳式携帯電話10が図1(c)の状態において、金属回転軸14と第2の回路基板12Aとの間隔D2の変化に対する放射効率特性を示す図である。なお、横軸の間隔D2は折畳み時において、金属回転軸14と第2の回路基板12Aとの長手方向の間隔であり、金属回転軸14の下端と第2の回路基板12Aの上端とが長手方向で一致する場合を間隔0mmとして、重なる場合を-、離れる場合を+として記載する。また、第1の動作周波数帯f1の放射効率特性を点線、第2の動作周波数帯f2の放射効率特性を実線で示す。
次に、本発明の第2の実施形態について、図5(a)および図5(b)を参照しながら詳細に説明する。なお、本実施形態において、第1の実施形態と同一部分には同一符号を付して重複説明を避ける。
次に、本発明の第3の実施形態について、図6(a)および図6(b)並びに図7(a)および図7(b)を参照しながら詳細に説明する。なお、本実施形態において、第1の実施形態と同一部分には同一符号を付して重複説明を避ける。
次に、本発明の第4の実施形態について、図8(a)~図8(c)並びに図9(a)および図9(b)を参照しながら詳細に説明する。なお、本実施形態において、第1の実施形態と同一部分には同一符号を付して重複説明を避ける。
次に、本発明の第5の実施形態について、図10を参照しながら詳細に説明する。なお、本実施形態において、第1の実施形態と同一部分には同一符号を付して重複説明を避ける。
次に、本発明の第6の実施形態について、図11および図12を参照しながら詳細に説明する。なお、本実施形態において、第1の実施形態と同一部分には同一符号を付して重複説明を避ける。
図12は、本発明の第6の実施形態における折畳式携帯電話機60を金属机上においた場合の側面図である。
次に、本発明の第7の実施形態について、図13を参照しながら詳細に説明する。なお、本実施形態において、第1の実施形態と同一部分には同一符号を付して重複説明を避ける。
11 下筐体(第1の筐体)
11A 第1の回路基板(下部回路基板)
12 上筐体(第2の筐体)
12A 第2の回路基板(上部回路基板)
13 ヒンジ部
14 金属回転軸(第1の金属回転軸)
140 連結部
141 金属回転軸の固定部
142 金属回転軸の回転部
15 給電バネ
16 インピーダンス整合回路
17 無線回路
21 第3の回路基板
22、52 リアクタンス素子
31 第2金属回転軸
311 第2金属回転軸の固定部
312 第2金属回転軸の連結部
313 第2金属回転軸の回転部
41、51、61 短絡素子
62 金属の机
71 シールドケース
72A、72B、72C 短絡接点
Claims (9)
- 第1の回路基板が配置された第1の筐体と、
第2の回路基板が配置された第2の筐体と、
前記第1の筐体と前記第2の筐体とを回動自在に連結し、導電性を有する第1の金属回転軸と、
前記第1の金属回転軸と接続された給電部と、
前記給電部と接続された前記第1の回路基板上の整合回路と、
前記整合回路と接続された前記第1の回路基板上の無線回路と、を備え、
前記第1の金属回転軸は、前記第1の回路基板上のグラウンドパターンと所定の間隔を隔てて配置され、かつ、前記給電部に電気的に接続されており、
前記第1の金属回転軸は、第1の周波数帯と、前記第1の周波数帯より高い第2の周波数帯でアンテナとして動作し、
前記第1の金属回転軸の断面積の直径を前記第2の周波数帯に対応する波長の略1/20波長以上とし、
前記第1の筐体と前記第2の筐体とを閉じた場合に、前記第1の金属回転軸と前記第2の回路基板上のグラウンドパターンとが筐体厚み方向において対向しないことを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置であって、
前記第1の筐体と前記第2の筐体とを閉じた場合に、前記第1の金属回転軸の軸方向の中心が、前記第1の筐体側に位置することを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置であって、
前記第2の筐体内の前記第1の金属回転軸側に第3の回路基板を備え、
前記第2の回路基板と前記第3の回路基板とをリアクタンス素子を介して接続し、
前記第1の筐体と前記第2の筐体とを閉じた場合に、前記第3の回路基板のグラウンドパターンが、前記第1の金属回転軸と筐体厚み方向において対向することを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置であって、
前記第1の筐体と前記第2の筐体とを前記第1の金属回転軸の軸方向と直交する軸方向で回動自在に連結し、導電性を有する第2の金属回転軸とを有し、
前記第1の金属回転軸と前記第2の金属回転軸とが所定の間隔で配置されたことを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置であって、
前記第1の金属回転軸および前記第1の回路基板と所定の間隔を隔てて、前記第1の金属回転軸と略並行に短絡素子を備え、
前記短絡素子の一端は、前記給電部近傍の前記第1の回路基板上のグラウンドパターンに短絡されることを特徴とするアンテナ装置。 - 請求項5に記載のアンテナ装置であって、
前記短絡素子の一端は、前記給電部近傍の前記第1の回路基板上のグラウンドパターンにリアクタンス素子を介して短絡されることを特徴とするアンテナ装置。 - 請求項5に記載のアンテナ装置であって、
前記短絡素子は、前記第1の筐体と前記第2の筐体とを閉じた場合に、第1の筐体と第2の筐体との近接する面に対向する面から所定の間隔を隔てて配置されることを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置であって、
前記無線回路の不要輻射を遮断する金属シールドを備え、
前記金属シールドの第1の短絡接点は、前記給電部近傍の前記第1の回路基板上のグラウンドパターンに短絡され、
第2の短絡接点は、第1の短絡接点に対して高い周波数帯に対応する波長の略1/2波長の間隔を隔てて配置され、前記第1の回路基板上のグラウンドパターンに短絡されることを特徴とするアンテナ装置。 - 請求項1ないし請求項8のいずれか一項に記載の前記アンテナ装置を搭載したことを携帯無線端末。
Priority Applications (1)
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US13/375,290 US20120086610A1 (en) | 2009-06-18 | 2010-02-22 | Antenna and portable wireless terminal equipped therewith |
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JP2009144904A JP2011004106A (ja) | 2009-06-18 | 2009-06-18 | アンテナ装置及びこれを搭載した携帯無線端末 |
JP2009-144904 | 2009-06-18 |
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KR102483631B1 (ko) * | 2018-06-11 | 2023-01-03 | 삼성전자주식회사 | 안테나를 포함하는 전자 장치 |
CN111262981B (zh) * | 2020-01-17 | 2021-09-03 | 惠州Tcl移动通信有限公司 | 一种通信终端 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57142003A (en) * | 1981-02-27 | 1982-09-02 | Denki Kogyo Kk | Antenna |
JP2006129230A (ja) * | 2004-10-29 | 2006-05-18 | Nec Corp | 携帯無線端末 |
WO2007032330A1 (ja) * | 2005-09-14 | 2007-03-22 | Matsushita Electric Industrial Co., Ltd. | 携帯無線機 |
JP2009094859A (ja) * | 2007-10-10 | 2009-04-30 | Panasonic Corp | アンテナ装置およびそれを用いた携帯端末 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2004049502A1 (en) * | 2002-11-26 | 2004-06-10 | Sony Ericsson Mobile Communications Ab | Antenna for portable communication device equipped with a hinge |
US20060170601A1 (en) * | 2005-01-28 | 2006-08-03 | Mediatek Inc. | Mobile communication devices |
JP4301293B2 (ja) * | 2005-06-30 | 2009-07-22 | パナソニック株式会社 | 携帯無線機 |
CN101779332A (zh) * | 2007-08-09 | 2010-07-14 | 松下电器产业株式会社 | 天线装置及便携式无线设备 |
JP4243645B1 (ja) * | 2007-10-31 | 2009-03-25 | パナソニック株式会社 | 携帯無線機 |
JP2010109747A (ja) * | 2008-10-30 | 2010-05-13 | Panasonic Corp | 携帯無線機 |
-
2009
- 2009-06-18 JP JP2009144904A patent/JP2011004106A/ja active Pending
-
2010
- 2010-02-22 US US13/375,290 patent/US20120086610A1/en not_active Abandoned
- 2010-02-22 WO PCT/JP2010/001159 patent/WO2010146739A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57142003A (en) * | 1981-02-27 | 1982-09-02 | Denki Kogyo Kk | Antenna |
JP2006129230A (ja) * | 2004-10-29 | 2006-05-18 | Nec Corp | 携帯無線端末 |
WO2007032330A1 (ja) * | 2005-09-14 | 2007-03-22 | Matsushita Electric Industrial Co., Ltd. | 携帯無線機 |
JP2009094859A (ja) * | 2007-10-10 | 2009-04-30 | Panasonic Corp | アンテナ装置およびそれを用いた携帯端末 |
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JP2011004106A (ja) | 2011-01-06 |
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