JP2010141712A - Mobile wireless unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve antenna performance of a constitution, wherein a connection cable connecting housings passes through an inside of a conductive hinge part. <P>SOLUTION: The constitution has a first housing 11, a second housing 12 and a third housing 13 including a hinge part connecting the first housing 11 and the second housing 12 rotatively. The structure of the hinge part is hinged two-way having a first hinge part 16 which opens and closes in a housing longer direction and a second hinge part 17 which is formed of a conductive member and opens and closes in a housing shorter direction. An antenna element 18 is disposed inside the third housing 13, and the second hinge part 17 functions as a ground of the antenna element 18. A connection cable 23 connecting a first circuit substrate 14 inside the first housing 11 and a second circuit substrate 15 inside the second housing 12 passes through an inside of the second hinge part 17. In such a constitution, the second hinge part 17 and the conductor part of the connection cable 23 are disposed keeping a prescribed distance therebetween. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable wireless device in which an antenna is mounted in a foldable casing.

  2. Description of the Related Art Mobile wireless devices such as mobile phone terminals are widely used in such a structure that two separate housings are connected via a hinge portion so that the housing can be opened / closed and folded. Some portable wireless devices of this type include a so-called housing dipole antenna that allows the housing itself or a circuit board mounted in the housing to function as an antenna.

  As a portable wireless device that causes a housing to function as an antenna, for example, in Patent Document 1, an antenna element provided in a first housing, and a first housing and a second housing are rotatably connected. And a conductive hinge part electrically connected to the antenna element, and a power feeding part for feeding power to the hinge part from a circuit board provided in the second casing, wherein the first casing is connected to the antenna element. A portable wireless device capable of functioning as is disclosed.

FIG. 8 is a diagram illustrating a configuration example of a portable wireless device including a housing dipole antenna. The left figure is seen from the back, and the right figure is seen from the right side of the back of the housing. In this example, a first casing 101, a second casing 102, these casings are rotatably connected, and include a hinge portion 103 made of conductive metal. One circuit board 104 is provided, and the second housing 102 is provided with a second circuit board 105. The hinge portion 103 is housed in either the first housing 101 or the second housing 102. An antenna element 106 is provided in the vicinity of the hinge portion 103 at a predetermined distance from the hinge portion 103, and the matching circuit 108 mounted on the second circuit board 105 in the second housing 102 via the power feeding portion 107, wirelessly The circuit 109 is connected. The first circuit board 104 and the second circuit board 105 are connected by a connection cable 110 for signal input / output, ground connection, and the like. In this configuration, the power feeding unit 107 feeds power from the wireless circuit 109 to the antenna element 106, the antenna element 106 is capacitively coupled to the hinge unit 103, and the hinge unit 103 and the first circuit board 104 in the first housing 101 are capacitively coupled. By coupling, the hinge part 103 and the first circuit board 104 function as an antenna element in a state where the housing is opened, and a dipole operation is performed. With such a configuration of the housing dipole antenna, a large antenna volume can be secured, so that it is possible to easily improve the antenna performance and widen the band. In the housing dipole antenna configuration, since the connection cable 110 is grounded, it is desirable that the connection cable 110 be arranged at a predetermined distance from the power feeding unit.
JP 2005-6096 A Japanese Patent No. 4064443

  The portable wireless device is greatly limited in antenna arrangement and space in terms of miniaturization of the housing and compatibility between design and antenna performance. In particular, in the case of the case dipole antenna configuration, it is difficult to reduce the size of the first case 101 because it is difficult to reduce the size of the hinge unit and the antenna element made of conductive metal in the same case. When arranged, the antenna element is arranged in the second casing 102. In such a case dipole antenna configuration, there is one in which a conductive hinge portion is connected to a ground in the case, and the hinge portion functions as a ground. Further, as described in Patent Document 2, the hinge includes two hinge portions, and is rotated by a first hinge portion having a rotation axis along the short side direction of the casing, and in the longitudinal direction of the casing. Proposed is a double-open structure that can be opened and closed, and is rotated by a second hinge portion having a rotation axis along the longitudinal direction of the housing, and can be opened and closed in the lateral direction of the housing. Yes.

  When structural restrictions are large, such as those with the double opening structure described above, it is necessary to arrange the connection cable for connecting the first housing and the second housing in a limited space such as the inside of the hinge portion. is there. For example, when the hinge part is connected to the ground and the connection cable is inserted inside the hinge part, the connection cables having different impedances are inserted through the inside of the hinge part, which is the ground. Has the problem of degrading performance.

  The present invention has been made in view of the above circumstances, and a portable wireless device capable of improving antenna performance when a connection cable for connecting between casings is inserted inside a conductive hinge portion. The purpose is to provide.

The present invention includes a first casing, a first circuit board provided in the first casing, a second casing, a second circuit board provided in the second casing, the first circuit board, A wireless circuit provided on any one of the second circuit boards, an antenna element connected to the wireless circuit, the first housing and the second housing are rotatably connected, and a conductive member A hinge part having a hollow inside, and a connection cable that is inserted through the hinge part and electrically connects the first circuit board and the second circuit board, and the hinge part is connected to the ground. Thus, a portable wireless device is provided that functions as a ground of the antenna element and in which the hinge portion and the conductor portion of the connection cable are arranged at a predetermined distance.
With the above configuration, when the electrical connection between the hinge portion and the conductor portion of the connection cable is weakened, and the connection cable connecting between the housings is inserted into the conductive hinge portion, the hinge portion It is possible to reduce the mutual influence between the cable and the connection cable, and to improve the antenna performance.

The present invention also provides a first housing, a first circuit board provided in the first housing, a second housing, a second circuit board provided in the second housing, and the first circuit. A wireless circuit provided on either the substrate or the second circuit board, an antenna element connected to the wireless circuit, and a third provided between the first casing and the second casing A first hinge portion that connects the first housing and the third housing so as to be rotatable about a first rotation axis, and the second housing and the third housing are connected to the first housing. A second hinge shaft that is perpendicular to the pivot shaft is pivotally connected to each other, and is composed of a conductive member. The interior of the second hinge portion is hollow and inserted into the second hinge portion. A connection cable for electrically connecting the circuit board and the second circuit board, wherein the second hinge portion is connected to a ground and the antenna element Functions as a ground, and the second hinge portion and the conductor portion of the connecting cables to provide a mobile radio device arranged with a predetermined distance.
With the above configuration, the electrical connection between the hinge portion and the conductor portion of the connection cable is weakened, and when the connection cable connecting between the casings is inserted into the conductive hinge portion, the hinge portion And the conductor portion of the connecting cable can be reduced, and the antenna performance can be improved. In particular, in the configuration having the first hinge portion and the second hinge portion, when the feeding portion of the antenna element and the ground of the hinge portion are arranged close to each other due to structural limitations, the ground of the hinge portion or the antenna element The influence of the connection cable on the power feeding section can be reduced, and high antenna performance can be obtained.

Further, the present invention is the above-described portable wireless device, wherein the antenna element is disposed in the third housing, and the antenna element and the second hinge portion are interposed in the third housing via a matching circuit. Includes connected ones.
When the antenna element is arranged in the third housing in the configuration having the first hinge portion and the second hinge portion, for example, when a so-called reverse hinge structure is used, the hinge is It is possible to reduce the electrical coupling between the connection portion and the conductor portion of the connection cable, reduce the influence of the connection cable on the ground of the hinge portion and the feeding portion of the antenna element, and improve the antenna performance.

Further, the present invention is the portable wireless device described above, wherein the second hinge portion and the connection are connected so that a capacitance value between the second hinge portion and the conductor portion of the connection cable is a predetermined value or less. The conductor part of the cable includes those arranged at a predetermined distance or more away from each other.
With the above configuration, the second hinge part and the conductor part of the connection cable are arranged apart from each other by a predetermined distance, and the capacitance value between the second hinge part and the conductor part of the connection cable becomes equal to or less than a predetermined value. It is possible to weaken the electrical coupling between the hinge part and the conductor part of the connection cable, reduce the influence of the connection cable, and improve the antenna performance.

Also, the present invention is any one of the portable radio devices described above, wherein the connection cable includes a coaxial cable, and has a predetermined impedance including an inductor between the outer conductor portion of the coaxial cable and the ground. Includes those with impedance elements.
With the above configuration, for example, even if the distance between the hinge portion and the conductor portion of the connection cable cannot be increased, and the capacitance value cannot be sufficiently reduced, the impedance between the inductor of the impedance element and the capacitance between the hinge portion and the connection cable can be reduced. A desired antenna performance improvement effect can be obtained by LC resonance.

  ADVANTAGE OF THE INVENTION According to this invention, when it is set as the structure by which the connection cable which connects between housing | casings is penetrated inside an electroconductive hinge part, the portable radio | wireless apparatus which can improve antenna performance can be provided.

  In the following embodiment, a configuration example of a portable wireless device when applied to a portable terminal device having a foldable casing such as a cellular phone is shown. The present invention can be applied to various portable wireless devices that can be carried by the user.

  First, the configuration of the foldable casing and the corresponding antenna arrangement will be described. 1A and 1B are diagrams illustrating a configuration example of a portable wireless device having a foldable housing. FIG. 1A shows a first example, and FIG. 1B shows a second example. In each of FIG. 1A and FIG. 1B, the left side is a view of the housing viewed from the back, and the right side is a view of the housing from the right side, so that each component inside the housing can be seen. The shape is shown schematically.

  The first example shown in FIG. 1A has a general double-open casing. In the first example, a third casing 53 having a hinge portion is provided between a first casing 51 and a second casing 52, and a first circuit board 54 is provided in the first casing 51. The second housing 52 is provided with a second circuit board 55. The third casing 53 includes a first hinge part 56 having a first rotation axis along the short direction of the casing for opening and closing the casing in the longitudinal direction as shown in the figure, and the casing And a second hinge part 57 having a second rotation axis along the longitudinal direction of the housing. The first hinge portion 56 connects the second casing 52 and the third casing 53, and the first casing 51 and the third casing 56 are centered on the first rotation axis with respect to the second casing 52. The casing 53 can be rotated. The second hinge portion 57 connects the first housing 51 and the third housing 53, and the first hinge 57 is first with respect to the second housing 52 and the third housing 53 around the second rotation axis. The casing 51 is made rotatable. Here, in the side view of FIG. 1A, the first hinge portion 56 and the second hinge portion 57 are arranged along the longitudinal extension line of the first housing 51.

  In this case, an antenna substrate 59 on which the antenna element 58 is mounted is provided near the hinge portion in the second housing 52. Although the first hinge portion 56 is not shown in the plan view of FIG. 1A, it is disposed in the second housing 52 at a position overlapping the antenna substrate 59 in the plan view. The antenna element 58 is connected to the second circuit board 55 through the power feeding unit 60, and is connected to the matching circuit 61 and the radio circuit 62 mounted on the second circuit board 55. Further, a connection cable 63 for signal input / output and the like is provided through the inside of the second hinge portion 57. The connection cable 63 is composed of a plurality of fine coaxial lines, etc., and is connected to the first circuit board 54 and the first circuit board 54. The two-circuit board 55 is electrically connected. The connection cable 63 connects the signal line that functions the circuit and the ground between the first circuit board 54 and the second circuit board 55. The power feeding section 60 and the connection cable 63 are arranged at a predetermined distance so as not to be close to each other at both ends of the casing in the short direction. In this configuration, the antenna element 58 and the first hinge portion 56 are first capacitively coupled, and the first hinge portion 56 and the first circuit board 54 in the first housing 51 are capacitively coupled, and the housing is opened. In FIG. 1, the first hinge portion 56 and the first circuit board 54 function as antenna elements and perform a dipole operation.

  The second example shown in FIG. 1 (B) is a so-called reverse hinge structure in which the first case 51 and the third case 53 are rotated with respect to the second case 52 in a double-open structure by modifying the first example. It is what. In the second example, a third housing 13 having a hinge portion is provided between the first housing 11 and the second housing 12, and the first circuit board 14 is provided in the first housing 11. The second casing 12 is provided with a second circuit board 15. Then, the first rotation along the short side direction of the housing for opening and closing the housing in the longitudinal direction as shown in the state shown in the figure at the proximal end of the second housing 12 on the third housing 13 side A first hinge portion 16 having a shaft is provided, and a second hinge having a second rotation axis along the longitudinal direction of the housing for opening and closing the housing in the lateral direction is provided in the third housing 13. A portion 17 is provided. The first hinge portion 16 connects the second housing 12 and the third housing 13, and the first housing 11 and the third housing 16 are centered on the first rotation axis with respect to the second housing 12. The housing 13 can be rotated. The second hinge portion 17 is made of a conductive member, connects the first housing 11 and the third housing 13, and has the second housing 12 and the third housing around the second rotation shaft. The first housing 11 is rotatable with respect to the body 13. Here, in the side view of FIG. 1B, the first hinge portion 16 is disposed along the longitudinal extension line of the second housing 12, and the second hinge portion 17 is the longitudinal extension of the first housing 11. It is arranged along the line.

  In this case, an antenna substrate 19 on which the antenna element 18 is mounted is provided in the third housing 13, and a matching circuit 21 is provided on the antenna substrate 19. The antenna element 18 is connected to the power feeding unit 20 and is connected to the radio circuit 22 mounted on the second circuit board 15 via the matching circuit 21 and the RF cable 29. The ground of the matching circuit 21 is connected to a second hinge portion 17 made of a conductive member via a connection member 24, and the second hinge portion 17 is connected to the first circuit board 14 in the first housing 11. The second hinge portion 17 functions as the ground of the antenna element 18. Also, a connection cable 23 for signal input / output is provided through the inside of the second hinge portion 17, and the first circuit board 14 and the second circuit board 15 are electrically connected by the connection cable 23. Has been. The connection cable 23 is configured by a plurality of thin coaxial lines or the like, and connects between the first circuit board 14 and the second circuit board 15 with a signal line for functioning the circuit and the ground.

  FIG. 2 shows a state when the first casing is opened in the lateral direction of the casing with the second hinge portion as an axis in the configuration of FIG. The first housing 11b, which is the end on the second hinge portion side in the housing short direction, is close to the second housing 12, but the end on the opposite side of the second hinge portion in the housing short direction. The first housing 11 a is separated from the second housing 12. Due to this structural limitation, the connection cable 23 needs to be inserted through the second hinge portion 17 that connects the first housing 11 and the third housing 13 in the vicinity of the first housing 11b. Moreover, the 1st hinge part 16 and the 2nd hinge part 17 are arrange | positioned at the both ends of a housing | casing transversal direction for the housing | casing size reduction. Due to this structural limitation, the RF cable 29 and the connection cable 23 need to be disposed in a limited space between the first hinge portion 16 and the second hinge portion 17. In addition, because the antenna element can be increased in volume and the length of the RF cable is shortened, the antenna performance can be expected to be improved, and the RF cable is difficult to route. The restriction | limiting which arrange | positions in the vicinity of the two hinge parts 17 and the connection cable 23 generate | occur | produces. As described above, since the power feeding unit 20 is disposed in the vicinity of the ground of the second hinge unit 17 and the connection cable 23, it is different from the conventional case dipole antenna configuration.

  3 is a diagram schematically showing the current during operation in the configuration example of the portable wireless device shown in FIG. 1. FIG. 3 (A) shows the current state in the first example, and FIG. The current states in the second example are respectively shown. Here, the arrows generally represent the direction of current flow, and when they are opposite to each other, they indicate an opposite phase.

  As shown in FIG. 3A, in the case of the configuration of the first example, a current 65 flows in the antenna element 58, and the antenna element 58 is capacitively coupled to the first hinge portion 56 and the first circuit board 54. As a result, a current 66 flows in the first circuit board 54 in the first housing 11. In addition, a current 67 flows from the ground of the matching circuit 61 connected to the antenna element 58 to the ground of the second circuit board 55. In the configuration of the first example, since the antenna element 58 is disposed in the second housing 52, the position of the power feeding unit 60 of the antenna element 58 can be set relatively freely, and the power feeding unit 60 is separated from the connection cable 63. It is possible to arrange. Therefore, the antenna element 58 is not easily affected by the current 68 flowing in the connection cable 63, and high radiation efficiency can be obtained. Further, since the second hinge portion 57 is not electrically and physically connected to the antenna element 58, the influence of the second hinge portion 57 is small.

  On the other hand, as shown in FIG. 3B, in the case of the configuration of the second example, an element current 25 flows in the antenna element 18 and is connected from the ground of the matching circuit 21 connected to the power feeding unit 20 of the antenna element 18. A current 27 flows through the member 24 and the second hinge portion 17 to the ground of the first circuit board 14 in the first housing 11. Further, a current 18 flows from the first circuit board 14 to the second circuit board 15 in the connection cable 23. In the configuration of the second example, the antenna element 18 is disposed in the third housing 13, and the first hinge portion 16, the second hinge portion 17, the antenna element 18, and the power feeding portion 20 described above with reference to FIG. 2. There is a structural restriction that the position of the is limited. Since the third housing 13 in which the antenna element 18 is disposed rotates with respect to the second housing 12, the power feeding portion 20 of the antenna element 18 can be set at a position away from the second hinge portion 17. Therefore, it must be arranged in the vicinity of the connection cable 23 and the second hinge portion 17. For this reason, the connection cable 23 and the second hinge portion 17 are easily affected. Further, in the connection cable 23, the current 28 flowing from the first circuit board 14 to the second circuit board 15 and the current 27 flowing from the second hinge part 17 to the first circuit board 14 are in opposite phases, and the current is cancelled. , Radiation efficiency decreases. In addition, since the connection cable 23 having different impedances is inserted through the second hinge portion 17 that is the ground of the matching circuit 21, mutual currents are easily affected.

  Therefore, in this embodiment, in order to improve the characteristics in the case configuration as in the second example, the following components are provided. FIG. 4 is a diagram showing the configuration of the portable radio apparatus according to the embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the component similar to FIG. 1 (B).

  In the present embodiment, the first circuit board 14 and the second casing of the first casing 11 are formed in a hollow portion inside the second hinge portion 17 that rotatably connects the first casing 11 and the third casing 13. The connection cable 23 that connects the 12 second circuit boards 15 is inserted. Here, the second hinge portion 17 is connected to the ground of the first circuit board 14 in the first housing 11, and the connection cable 23 is transmitted between the first circuit board 14 and the second circuit board 15. The signal to be played flows. In this way, in the configuration in which the connection cable is inserted inside the hinge portion that couples the plurality of housings, the inner diameter of the hollow hinge portion is configured to be sufficiently larger than the diameter of the connection cable. A predetermined distance is secured between the cable and the connection cable. Specifically, the hinge part and the conductor part of the connection cable are arranged apart from each other by a predetermined distance or more so that the capacitance value between the hinge part and the conductor part of the connection cable is a predetermined value or less. To do. Thereby, the electrical coupling between the second hinge portion 17 and the connection cable 23 is weakened. Therefore, it is possible to reduce the influence of the connection cable 23 viewed from the power feeding unit 20 of the antenna element 18 and to obtain high antenna performance.

  FIG. 5 is a diagram showing a cross-section of the main part of the hinge part of the present embodiment, showing the dimensional relationship between the hinge part and the connection cable. When the outer diameter of the conductor A31 constituting the connection cable 23 is L1, and the inner diameter of the conductor B32 having a hollow portion constituting the second hinge portion 17 is L2, L2 is configured to be sufficiently larger than L1. Specifically, the inner diameter L2 of the conductor B32 is relatively increased, or the outer diameter L1 of the conductor A31 is decreased. Thereby, the capacitance value between the conductor A31 and the conductor B32 is reduced, and the electrical coupling between the second hinge portion 17 and the connection cable 23 is weakened.

  FIG. 6 is a diagram showing an example of the capacitance value between the hinge portion and the connection cable, and shows a specific example of the capacitance value design between the conductor A31 and the conductor B32 in FIG. FIG. 6A is a graph showing the relationship between the capacitance value of each example and antenna performance (vs. target value), and FIG. 6B shows the size and capacitance value of each example. Here, L1 is the outer diameter of the conductor A31 in FIG. 5, L2 is the inner diameter of the conductor B32 in FIG. 5, and L3 is the length of the conductor B32 in FIG. The capacitance value C is obtained by the following formula (1).

C = εo * εr * (2πL2 * L3) / (L2−L1) [F] (1)
Where εo: dielectric constant of vacuum [F / m]
εr: relative dielectric constant
L1, L2, L3: Length [m]
Note that the capacitance value between the conductors A and B shown in FIG. 6B is calculated as εr = 1.

  FIG. 6A shows the antenna performance with respect to the target value in the 800 MHz band when L1 and L2 are changed as the antenna performance. The smaller the capacitance value between the conductors A and B, the higher the antenna performance with the housing open. In example <1>, L1 = 1.8 mm, L2 = 2.0 mm, and L3 = 14 mm. At this time, the capacitance value is C = 7.01 pF, which is about 6 dB lower than the target value in the transmission band. State.

  Therefore, in order to make the capacitance value between the conductor A and the conductor B as small as possible, the example <2> increases L2 from 2.0 mm to 3.1 mm and increases the inner diameter L2 of the conductor B32. C = 1.08 pF. In example <3>, the outer diameter L1 of the conductor A31 is reduced by changing L1 from 1.8 mm to 0.8 mm, and the capacitance value at this time is C = 0.55 pF. As shown in FIG. 6A, the antenna performance can be improved and the target value can be achieved in both examples <2> and <3>. In this case, the capacity value of Example <3> was smaller, and a higher effect was obtained. Here, if it is at least smaller than the capacity value of the example <2>, the target value set in the present embodiment can be satisfied, and the effect of improving the antenna performance can be obtained by any of the methods <2> and <3>.

  FIG. 7 is a diagram showing a configuration of a portable radio apparatus according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the component similar to FIG. In the second embodiment, an impedance element having a predetermined impedance including an inductor that forms a lumped constant L is provided between an outer conductor portion of a connection cable made of a coaxial cable and a ground. In the configuration of FIG. 7, the impedance element 35 is disposed between the outer conductor portion of the cable and the ground of the second hinge portion 17 in the vicinity of the outlet of the second hinge portion 17 on the first housing 11 side of the connection cable 23. Yes. Thus, by inserting the lumped constant L between the connection cable and the ground, the LC resonance circuit is configured by the capacitance C and the lumped constant L between the connection cable and the hinge portion. The impedance element 35 is not limited to the configuration provided between the outer conductor portion of the connection cable 23 and the ground of the second hinge portion 17, and is between the outer conductor portion of the connection cable 23 and the ground of the first circuit board 14. It is good also as a structure which is provided in.

  By providing an impedance element between the connection cable and the ground in this way, even if the capacity between the connection cable and the hinge portion cannot be sufficiently reduced, a desired antenna performance improvement effect can be obtained by LC resonance. Can do.

  As described above, according to the present embodiment, the second hinge portion 17 and the connection cable 23 are arranged so as to maintain a predetermined distance, and the electrical coupling is performed so that the capacity between the two becomes a predetermined value or less. By weakening the antenna performance, the antenna performance can be improved. In particular, when the ground of the second hinge portion 17 and the power feeding portion 20 of the antenna element 18 are arranged close to each other due to structural restrictions, the hinge portion when the dipole operation is performed with the housing opened is performed. The influence of the connection cable on the ground and the feeding portion of the antenna element can be reduced, and high antenna performance can be obtained.

  It should be noted that the present invention is not limited to those shown in the above-described embodiments, and those skilled in the art can also make changes and applications based on the description in the specification and well-known techniques. Yes, included in the scope of protection.

  In the above-described embodiment, the configuration in which the first hinge portion and the second hinge portion are provided and the third housing is provided between the first housing and the second housing has been described. However, the present invention is not limited to this, and can be similarly applied to a configuration including at least one hinge portion. For example, a similar effect can be obtained by applying the configuration of this embodiment even in a structure in which two housings are provided and a connection cable is inserted through a hinge portion that connects these two housings. In addition, the double-open structure having two hinge portions can be applied to both the general hinge structure shown in FIG. 1 (A) and the reverse hinge structure shown in FIG. 1 (B).

  The present invention has an effect that the antenna performance can be improved when the connection cable for connecting between the casings is inserted into the inside of the conductive hinge portion, and the antenna is installed in the foldable casing. It is useful as a portable wireless device equipped with

The figure which shows the structural example of the portable radio | wireless apparatus with a foldable housing | casing FIG. 1B is a diagram showing a state when the first housing is opened in the lateral direction of the housing with the second hinge portion as an axis in the configuration of FIG. The figure which showed typically the electric current at the time of the operation | movement in the structural example of the portable radio | wireless apparatus shown in FIG. The figure which shows the structure of the portable radio | wireless apparatus which concerns on embodiment of this invention. The figure which shows the principal part cross section of the hinge part of this embodiment. The figure which shows the Example of the capacitance value between a hinge part and a connection cable The figure which shows the structure of the portable radio | wireless apparatus which concerns on the 2nd Embodiment of this invention. The figure which shows the structural example of a portable radio | wireless apparatus provided with the antenna of a housing | casing dipole system

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 1st housing | casing 12 2nd housing | casing 13 3rd housing | casing 14 1st circuit board 15 2nd circuit board 16 1st hinge part 17 2nd hinge part 18 Antenna element 19 Antenna board 20 Feeding part 21 Matching circuit 22 Wireless circuit 23 Connection cable 24 Connection member 29 RF cable 31 Conductor A
32 Conductor B
35 Impedance element

Claims (5)

A first housing;
A first circuit board provided in the first housing;
A second housing;
A second circuit board provided in the second housing;
A radio circuit provided on either the first circuit board or the second circuit board;
An antenna element connected to the radio circuit;
The first housing and the second housing are rotatably connected, and are composed of a conductive member.
A connection cable inserted through the hinge portion and electrically connecting the first circuit board and the second circuit board;
The hinge part is connected to the ground and functions as the ground of the antenna element,
A portable radio apparatus in which the hinge part and the conductor part of the connection cable are arranged at a predetermined distance. A first housing;
A first circuit board provided in the first housing;
A second housing;
A second circuit board provided in the second housing;
A radio circuit provided on either the first circuit board or the second circuit board;
An antenna element connected to the radio circuit;
A third housing provided between the first housing and the second housing;
A first hinge portion for connecting the first housing and the third housing so as to be rotatable about a first rotation axis;
The second casing and the third casing are connected to each other so as to be rotatable about a second rotation axis perpendicular to the first rotation axis, and are constituted by a conductive member, and the second hinge part having a hollow inside When,
A connection cable that is inserted into the second hinge portion and electrically connects the first circuit board and the second circuit board;
The second hinge part is connected to the ground and functions as the ground of the antenna element,
A portable radio apparatus in which the second hinge part and the conductor part of the connection cable are arranged at a predetermined distance. The portable wireless device according to claim 2,
The portable wireless device, wherein the antenna element is disposed in the third housing, and the antenna element and the second hinge portion are connected via a matching circuit in the third housing. The portable wireless device according to claim 2,
The second hinge part and the conductor part of the connection cable are spaced apart from each other by a predetermined distance or more so that the capacitance value between the second hinge part and the conductor part of the connection cable is a predetermined value or less. Portable wireless device. The portable wireless device according to any one of claims 2 to 4,
The portable wireless device includes an impedance element having a predetermined impedance including an inductor between an outer conductor portion of the coaxial cable and a ground.

Images