JP2004254098A - Fold-up portable radio apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fold-up portable radio apparatus by which quality of calls is improved by selecting an antenna exhibiting a higher gain according to change in type of usage with a simple structure even when it deals with several frequency bands. <P>SOLUTION: An upper case 1 and a lower case 2 are foldably coupled through a hinge 3. One of the cases 1 and 2 is equipped with a built-in antenna 4 dealing with multiband and the other is equipped with a built-in antenna 5 which covers at least one of the bands covered by the built-in antenna 4 dealing with multiband. The built-in antennas 4 and 5 are connected to a transmitting and receiving apparatus of a portable telephone through a switching controller 8 for controlling switching of antennas. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a foldable portable wireless device having a housing structure in which an upper housing and a lower housing can be folded via a hinge portion.
[0002]
[Prior art]
Recently, a large liquid crystal display unit is provided in the upper housing to cope with the increase in functions, and a mobile device having a housing structure in which the upper housing and the lower housing can be folded via a hinge for convenience when carrying. Many telephones have been developed and spread.
[0003]
As shown in FIG. 6, in the conventional foldable mobile phone, planar antennas 104 and 105 are mounted on respective housings 101 and 102 constituting the foldable housing via a hinge portion 103. It is known that these two planar antennas 104 and 105 or one of them is used for transmission / reception (for example, see Patent Document 1).
[0004]
Also, in recent years, services have been diversified with the development of mobile communication technology, and mobile phones that support a plurality of frequency bands have been demanded.
As shown in FIG. 7, a conventional foldable mobile phone corresponding to a plurality of frequency bands includes a first antenna 106 and a lower housing (flipper) 102 arranged on an upper housing (main body) 101 of a wireless device. A configuration in which a built-in second antenna 107 operates at two different frequencies is known (for example, see Patent Document 2). In FIG. 7, the upper housing 101 includes a display unit 108, a receiver 109, and an operation unit 110, while the hinge unit 103 includes a telephone 111.
[0005]
In addition, in a conventional antenna corresponding to a plurality of frequency bands, as shown in FIG. 8, an antenna element 112A on the open end side and an antenna element 112B on the feed point 113 side are connected by a trap circuit 114. For example, in a low frequency band, a current flows through the entire antenna including the open-end-side element 112A, and in a high frequency band, a current flows only through the feeding-side antenna element 112B before the trap circuit 114. I have. Therefore, with such a configuration, a multi-band antenna corresponding to two frequency bands can be realized (for example, see Patent Document 3).
[0006]
[Patent Document 1]
JP-A-2002-171190 (FIG. 1 (a))
[Patent Document 2]
JP-A-9-215036 (FIG. 1 (a))
[Patent Document 3]
JP-A-11-55022 (FIG. 1)
[0007]
[Problems to be solved by the invention]
However, in the conventional foldable mobile phone, when the antenna has a configuration corresponding to a plurality of frequency bands, a method of controlling the switching of the antenna with respect to a change in the usage form of the portable wireless device is not clear, and this switching control is performed. In the case of implementation, a very complicated control is required, so that an enormous load is imposed on the software.
[0008]
In addition, the conventional multi-band compatible antenna has a problem that it is difficult to efficiently incorporate the antenna in a small space due to the addition of a trap circuit in a mobile phone that tends to be miniaturized, and is inferior in mass productivity. was there.
[0009]
The present invention has been made in order to solve these conventional problems, and even in a case where it corresponds to a plurality of frequency bands, it has a simple configuration to cope with a change in a use form such as an opening and closing operation of a housing. It is an object of the present invention to provide a foldable portable wireless device that can improve communication quality by appropriately selecting an antenna that can obtain a higher gain.
[0010]
[Means for Solving the Problems]
The foldable portable wireless device of the present invention is a foldable portable wireless device having a housing structure in which an upper housing and a lower housing are foldable via a hinge portion,
The one housing has a built-in antenna compatible with multiband,
The other case is characterized in that a built-in antenna covering at least one band among a plurality of bands covered by the multi-band built-in antenna is mounted.
[0011]
With this configuration, it is possible to select, from the two mounted antennas, an antenna that can obtain a high antenna gain in response to a change in the usage form of the portable wireless device such as opening and closing of the housing and approach of a human body, and communication quality. Can be improved.
[0012]
The foldable portable wireless device according to the present invention includes a first transceiver and a second transceiver that operate in different frequency bands,
A first changeover switch and a second changeover switch,
The first changeover switch is connected to one of the first and second transceivers and one of the built-in antennas,
The second changeover switch is connected to one of the first and second transceivers and to the other of the built-in antenna.
[0013]
With this configuration, since the two antennas operate in different frequency bands, interference between the antennas is reduced, and the communication characteristics can be improved.
[0014]
Further, the foldable portable wireless device of the present invention is characterized by having a switching control device that switches the built-in antenna by opening and closing the upper housing and the lower housing.
[0015]
With this configuration, for example, it is possible to realize a switching control device that is closed only by hardware without using complicated software-based control and the like. You can switch to an antenna.
[0016]
Further, the foldable portable wireless device according to the present invention, wherein the one built-in antenna corresponding to multi-band and the other one covering at least one band among a plurality of bands covered by the one built-in antenna corresponding to multi-band. At least one of the built-in antennas is a balanced feed type built-in antenna.
[0017]
The built-in antenna of the balanced feeding type is less affected by noise and human body generated from mounted components because a small amount of current flows through the conductive portion of the housing and the internal substrate. Therefore, with this configuration, it is possible to improve the communication quality in the frequency band covered by the balanced feed antenna.
[0018]
Further, in the foldable portable wireless device according to the present invention, the one of the multi-band compatible built-in antennas is divided into two or more antennas on a surface or inside a dielectric having a three-dimensional shape having an arbitrary dielectric constant. While it is composed of elements arranged,
The antenna elements are connected by a reactance component on a dielectric.
[0019]
With this configuration, the antenna can be built in a small space, and the antenna element and the reactance component are arranged in a three-dimensional dielectric material. A portable wireless device can be provided.
[0020]
Furthermore, the foldable portable wireless device of the present invention is characterized in that the one built-in antenna corresponding to the multi-band covers four frequency bands of GSM900, GSM1800, PCS1900, and WCDMA.
[0021]
With this configuration, a foldable portable wireless device that supports two modes and four bands can be provided.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[First Embodiment]
FIGS. 1 and 2 show a foldable mobile phone according to a first embodiment of the present invention. In the foldable mobile phone, an upper housing 1 and a lower housing 2 are connected via a hinge 3. The upper housing 1 has a built-in antenna for multi-band (hereinafter, referred to as a multi-band built-in antenna) 4 in the upper housing 1, and the lower housing 2 has a built-in antenna for multi-band. A built-in antenna 5 covering at least one band among the bands covered by 4 is mounted.
[0023]
Among these, the built-in antenna 4 corresponding to the multiband has a band covered in the present embodiment, a GSM (Global Systems for Mobile communications) 900 using the 900 MHz band, a GSM 1800 using the 1800 MHz band, and a PCS (Personal Communications System) using the 1800 MHz band. ) It is composed of a WCDMA (Wideband Code Division Multiple Access) using channels of 1900 and 2000 MHz, thereby constituting a foldable portable telephone supporting two modes and four bands.
[0024]
On the other hand, the built-in antenna 5 is configured to cover at least one band of the multi-band compatible built-in antenna. In the present embodiment, the built-in antenna 5 covers, for example, the 2000 MHz band, but is particularly limited to this band. Not something.
[0025]
Further, the foldable mobile phone according to the present embodiment is provided with a switching control device 8 for performing antenna switching control in addition to the built-in antennas 4 and 5 described above. The transceiver and the built-in antenna 4 and the built-in antenna 5 for multi-band are connected via the switching control device 8.
[0026]
As described above, according to the first embodiment of the present invention, the switching control device 8 can appropriately switch and select an antenna that can obtain a high antenna gain, and can improve call quality. .
[0027]
Further, according to the foldable portable wireless device of the first embodiment of the present invention, since the two antennas operate in different frequency bands, the interference between the antennas is reduced and the call characteristics can be improved.
[0028]
In the present embodiment, the built-in antenna 4 corresponding to the multi-band is arranged on the upper case 1 side, and the built-in antenna 5 covering at least one band of the built-in antenna 4 for the multi-band is arranged on the lower case 2 side. Similar effects can be obtained even if they are arranged in reverse. The same effect can be obtained by disposing both built-in antennas 4 and 5 in either one of the housings 1 and 2. Further, in the present embodiment, the switching control device 8 is installed in the lower housing 2, but may be installed in the upper housing 1.
[0029]
[Second embodiment]
Next, a foldable mobile phone according to a second embodiment of the present invention will be described. Note that, in the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description will be avoided.
FIG. 3 shows a foldable mobile phone according to a second embodiment of the present invention. In this foldable mobile phone, the first and second transceivers operate in different frequency bands. 6 and 7, and the changeover control device 8 is formed by first and second changeover switches 81.
[0030]
In the multi-band built-in antenna 4, as shown in FIG. 4, antenna elements 41A and 41B composed of two lines are arranged on a three-dimensional dielectric 40 having an arbitrary dielectric constant. The two antenna elements 41A and 41B are configured to be connected by a reactance component 42, and the multi-band built-in antenna is configured to be fed from a feeding point 43.
[0031]
As described above, the switch control device 8 includes the first switch 81 and the second switch 82, and these two switches 81 and 82 operate in different frequency bands from each other. It is connected to a first transceiver 6 and a second transceiver 7.
That is, the first changeover switch 81 is provided between the built-in antenna 4 provided on the upper housing 1 (see FIGS. 1 and 2) and the built-in antenna 5 provided on the lower housing 2 (see FIGS. 1 and 2). One of them is configured to be switchable and connected to the first transceiver 6. On the other hand, the second changeover switch 82 is configured to be switchably connectable to either the built-in antenna 4 or the built-in antenna 5 for multi-band, and is connected to the second transceiver 7.
[0032]
Further, when the first and second changeover switches 81 and 82 according to the present embodiment detect the opening and closing operation of the upper case 1 and the lower case 2, the built-in antennas 4 and 5 by these changeover switches 81 and 82. In order to perform a connection switching operation between the transmitter and the transmitter / receiver 6, 7, an appropriate detection means (not shown) for detecting an opening / closing operation of the housing is also connected.
Note that the detecting means is not limited to the one that detects the opening and closing operation of the upper and lower casings as in the present embodiment. For example, when the approach of a human body is detected, the first and second detecting means are automatically performed. The configuration may be such that the changeover switches 81 and 82 are operated.
[0033]
As described above, according to the second embodiment of the present invention, it is possible to increase the antenna gain in response to a change in the usage mode of the portable wireless device such as the opening / closing operation of the housing (or the approach of a human body). Antenna can be selected, and the communication quality can be improved.
[0034]
Further, according to the foldable portable wireless device of the first embodiment of the present invention, since the two antennas operate in different frequency bands, the interference between the antennas is reduced and the call characteristics can be improved.
[0035]
Further, the foldable portable wireless device according to the present embodiment includes a switching control device 8 for antenna switching for forcibly switching the antennas 4 and 5 by opening and closing the foldable portable wireless device. It is possible to provide a switching control device 8 that is closed only by hardware without using control. In particular, as described above, it is possible to automatically switch to an antenna having a higher antenna gain in response to a change in the usage pattern such as opening and closing of the housing.
[0036]
In addition, according to the foldable mobile phone according to the first embodiment of the present invention, the antenna can be built in a small space and is made of a three-dimensionally shaped dielectric, so that it is excellent in mass productivity. Can be provided.
[0037]
Note that, also in the present embodiment, the built-in multi-band antenna 4 is disposed on the upper housing 1 side, and the built-in antenna 5 covering at least one band of the multi-band built-in antenna 4 is disposed on the lower housing 2 side. Similar effects can be obtained even if they are arranged in reverse. The same effect can be obtained by disposing both built-in antennas 4 and 5 in either one of the housings. In the present embodiment, the switching control device 8 is installed in the lower housing 2, but may be installed in the upper housing 1.
[0038]
Further, in the present embodiment, the first and second transceivers 6 and 7 are collectively installed in the same housing, that is, the lower housing 2 in which the switching control device 8 is installed. In other words, the first transceiver 6 is installed on the upper housing 1 where the built-in multi-band compatible antenna 4 is installed, and the second transceiver 7 is installed on the built-in antenna 5. It may be installed in the lower housing 2.
[0039]
[Third Embodiment]
Next, a foldable mobile phone according to a third embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first and second embodiments are denoted by the same reference numerals, and redundant description will be avoided.
In the third embodiment of the present invention, in the foldable mobile phone according to the first or second embodiment of the present invention, at least one of the built-in antenna 4 and the built-in antenna 4 of the multi-band compatible built-in antenna 4 and the built-in antenna 5 5 is a configuration of a balanced feeding antenna 9 shown in FIG.
[0040]
The balanced feeding antenna 9 is configured to be less affected by noise and human body generated from mounted components due to a small amount of current flowing to the conductive portions inside the upper and lower housings and the internal substrate. The communication quality can be improved in the band covered by the feed antenna.
[0041]
Although the present embodiment has been described using the balanced feeding type U-shaped dipole antenna, the same effect can be obtained by using a balanced feeding type antenna having another structure. Further, in the present embodiment, the foldable portable wireless device of the present invention is applied to a foldable portable telephone. However, the present invention is not particularly limited to this, and is applicable to a portable wireless device having various foldable casings. It is possible.
[0042]
【The invention's effect】
As described above, according to the present invention, as described above, the present invention provides a multi-band built-in antenna mounted on one housing and at least one band of the antenna mounted on the other housing. By providing a built-in antenna that covers the antenna and providing a control device that connects two changeover switches to different antennas, the antenna that can obtain a higher antenna gain in response to changes in the usage pattern of the portable wireless device It is possible to provide a foldable portable wireless device that can be selected and has an effect of improving the call quality.
[0043]
Furthermore, if the built-in multi-band antenna is made of a three-dimensional dielectric material with an arbitrary permittivity, it can be built in a small space and has a built-in antenna that is excellent in mass production. Wireless devices can be provided.
[0044]
Also, if the antenna is of a balanced feeding type, it is less susceptible to noise and human body emitted from mounted components, so that it is possible to improve speech quality [Brief description of drawings]
FIG. 1 is a side view showing a foldable mobile phone according to a first embodiment of the present invention.
FIG. 2 is a plan view showing a state of the outer surface side of the foldable mobile phone according to the first embodiment with the housing opened.
FIG. 3 is a wiring diagram illustrating an electrical connection state of a transceiver, a switching control device, an antenna, and the like of the foldable mobile phone according to the second embodiment of the present invention.
FIG. 4 is an explanatory diagram showing a specific configuration of a built-in multiband compatible antenna of the foldable mobile phone according to the same second embodiment.
FIG. 5 is a configuration diagram showing a balanced-feed antenna of a foldable mobile phone according to a third embodiment of the present invention.
FIG. 6 is a schematic side view showing an antenna arrangement state of a conventional foldable mobile phone.
FIG. 7 is a schematic perspective view showing a state in which the housing of the conventional foldable mobile phone is opened.
FIG. 8 is a wiring diagram showing a connection state of main parts in a conventional antenna.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Hinge part 4 Built-in antenna for multi-band 40 Dielectrics 41A and 41B
Antenna element 42 Reactance component 43 Feed point 5 Built-in antenna 6 First transceiver 7 Second transceiver 8 Switching control device 81 First switching switch 82 Second switching switch 9 Balanced feeding antenna

Claims (6)

A folding portable wireless device having a housing structure in which an upper housing and a lower housing are freely foldable via a hinge portion,
The one housing has a built-in antenna compatible with multiband,
A foldable portable wireless device, wherein the other housing is equipped with a built-in antenna covering at least one band among a plurality of bands covered by the multi-band built-in antenna. A first transceiver and a second transceiver operating in different frequency bands,
A first changeover switch and a second changeover switch,
The first changeover switch is connected to one of the first and second transceivers and one of the built-in antennas,
The folding switch according to claim 1, wherein the second changeover switch is connected to one of the first and second transceivers and to the other of the built-in antennas. Portable wireless devices. The foldable portable wireless device according to claim 1 or 2, further comprising a switching control device that switches the built-in antenna by opening and closing the upper housing and the lower housing. At least one of the one built-in antenna for multi-band and the other built-in antenna for covering at least one band of a plurality of bands covered by the one built-in antenna for multi-band is The foldable portable wireless device according to any one of claims 1 to 3, wherein the portable wireless device is a balanced feed type built-in antenna. The one built-in antenna corresponding to the multi-band is configured by arranging antenna elements divided into two or more on the surface or inside of a dielectric having a three-dimensional shape having an arbitrary dielectric constant,
The foldable portable wireless device according to any one of claims 1 to 4, wherein the antenna elements are connected by a reactance component on a dielectric. The foldable mobile phone according to any one of claims 1 to 5, wherein the one built-in antenna corresponding to the multi-band covers four frequency bands of GSM900, GSM1800, PCS1900, and WCDMA. Wireless devices.

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