JP5102116B2 - Wireless portable terminal device - Google Patents

Description

  The present invention relates to a wireless portable terminal device including a high-frequency substrate on which an antenna is mounted.

Conventionally, in order to control the direction of radio waves radiated from an antenna built in a wireless communication device to a desired direction, a high-frequency substrate on which an antenna is mounted is provided with a notch slit (for example, (See Patent Document 1).
JP 2001-274719 A

In recent years, portable terminal devices having an optical reading function for reading a barcode and a wireless communication function for performing data communication with an RF tag have been used.
In such a portable terminal device, in order not to impair user convenience, the direction in which the portable terminal device is directed to the barcode to read the barcode, and the direction in which the portable terminal device is directed to the RF tag to read the RF tag It is desirable that and substantially match. That is, a barcode reading direction (hereinafter also referred to as a camera reading direction) with a camera (hereinafter also referred to as a built-in camera) built in the mobile terminal device and an antenna (hereinafter also referred to as a built-in antenna) built into the mobile terminal device. It is desirable that the direction of the radio wave radiated from () (hereinafter also referred to as the radio wave radiation direction) substantially coincides.

  Therefore, it is necessary to control the radio wave radiation direction so that the radio wave radiation direction matches the camera reading direction. However, when the technology described in Patent Document 1 is applied to control the radio wave radiation direction and a notch slit is provided in the high-frequency substrate on which the built-in antenna is mounted, the mounting area of the high-frequency circuit unit provided on the high-frequency substrate is reduced. There has been a problem that the design freedom of the high-frequency substrate is reduced.

  Note that the direction of radio wave radiation can be controlled by increasing the size of the high-frequency substrate. However, in portable terminal devices where miniaturization is important, it is not desirable to increase the size of the high-frequency substrate.

  The present invention has been made in view of these problems, and provides a wireless portable terminal device capable of controlling the direction of radio waves radiated from a built-in antenna without reducing the design freedom of a high-frequency substrate. Objective.

  The wireless portable terminal device according to claim 1, which has been made to achieve the above object, is equipped with an antenna element for transmitting and receiving radio waves having a wavelength of λ, and has a rectangular shape with all four sides being λ / 4 or less. A wireless portable terminal device incorporating a formed high-frequency substrate, wherein an antenna element is arranged along one side of the edge of one of four sides constituting a rectangle of the high-frequency substrate, The high-frequency board is a connection point for electrically connecting the built-in board, which is a board built in the wireless portable terminal device, or the built-in conductor plate, which is a conductor plate built in the wireless portable terminal apparatus, and the high-frequency board. The conductive connection point is provided on the edge of at least one of the three sides other than the one of the edge where the antenna element is arranged.

  First, an antenna element is arranged along one side of one of the four sides constituting the high-frequency substrate having a rectangular shape with all four sides being λ / 4 or less, and is conductive. FIG. 3A shows a simulation result of the direction of the current flowing through the high-frequency substrate when the antenna element is fed when no connection point is provided.

  FIG. 3B is a diagram showing a simulation result of the directivity of the antenna element in the situation shown in FIG. In FIG. 3 (b), the higher the radiation intensity of the antenna element, the darker the color.

  As shown in FIG. 3A, when the antenna element is fed, a current flows along the longitudinal direction of the antenna element (see arrow Y1). Further, two sides (sides 4b and 4d in FIG. 3A) intersecting one side (side 4a in FIG. 3A, hereinafter referred to as an antenna installation side) where the antenna element is arranged at the end edge portion. ) Along one of the sides (side 4b in FIG. 3 (a)) and the edge parallel to the antenna installation side (side 4c in FIG. 3 (a)). Current flows (see arrows Y2 and Y3). On the other hand, no current flows along this one side on the edge of the other side (side 4d in FIG. 3A) of the two sides intersecting with the antenna installation side.

  As a result, a current that is oblique to the antenna installation side flows in the center of the surface of the high-frequency substrate (see arrow Y4). For this reason, as shown in FIG.3 (b), the directivity peak of an antenna element shifts | deviates from the front of an antenna element.

  Next, an antenna element is arranged along one side of the edge of one of the four sides constituting the high-frequency substrate having a rectangular shape with all four sides being λ / 4 or less, and The high-frequency substrate when the antenna element is fed in the case where a conduction connection point is provided on the edge of one of the three edges other than the edge of the edge where the antenna element is arranged FIG. 4A shows the simulation result of the direction of the current flowing through the.

  FIG. 4B is a diagram showing a simulation result of the directivity of the antenna element in the situation shown in FIG. In FIG. 4 (b), the higher the radiation intensity of the antenna element, the darker the color.

  As shown in FIG. 4A, when the antenna element is fed, a current flows along the longitudinal direction of the antenna element (see arrow Y11), and on the edge portions of the three sides other than the antenna installation side. , Current flows along these three sides (see arrows Y12, Y13, Y14, Y15).

  Thereby, the electric current which becomes a substantially parallel direction with respect to the edge | side 4a flows into the center part of the surface 4e of the high frequency board | substrate 4 (refer arrow Y16). Therefore, as shown in FIG. 4B, the directivity peak of the antenna element is in the vicinity of the front of the antenna element.

  Next, FIGS. 6 to 8 show the directivity of the antenna element when one conduction connection point is moved along the three sides on the edge portions of the three sides other than the antenna installation side. It is a figure which shows a simulation result.

  6 (a), (b), (c), (d), (e), (f), (g), (h), (i) are respectively positions P1, P2, and FIG. A simulation result when conduction connection points are arranged at P3, P4, P5, P6, P7, P8, and P9 is shown. 7 (a), (b), (c), (d), (e), (f), (g), (h), (i), (j), and (k) are respectively The simulation result when the conductive connection points are arranged at the positions P9, P10, P11, P12, P13, P14, P15, P16, P17, P18, and P19 in FIG. 5 is shown. 8 (a), (b), (c), (d), (e), (f), (g), (h), and (i) are respectively positions P19, P20, and FIG. A simulation result in the case where conductive connection points are arranged at P21, P22, P23, P24, P25, P26, and P27 is shown. In FIGS. 6 to 8, the higher the radiation intensity of the antenna element 3, the darker the color.

  As shown in FIGS. 6 to 8, the conductive connection points are arranged along the three sides on the edge portions of the three sides other than the antenna installation side, so that the position of the directivity peak of the antenna element is determined. It can be moved from the position of the directivity peak when the conduction connection point is not arranged.

  On the other hand, as shown in FIG. 9 (a), when the conduction connection point is arranged at the center of the high-frequency substrate, the position of the directivity peak of the antenna element is as shown in FIG. 9 (b). It hardly changes compared to the position of the directivity peak when no connection point is arranged. This is because the current flowing along the edge of the high-frequency substrate cannot be controlled even if the conductive connection point is arranged at the center of the high-frequency substrate.

  As described above, according to the wireless portable terminal device of the first aspect, the direction of the radio wave radiated from the antenna element can be controlled. In addition, since the conductive connection point is arranged at the edge of the high-frequency substrate, it is possible to suppress a reduction in the degree of freedom in designing the high-frequency substrate due to the provision of the conductive connection point.

  Moreover, in the wireless portable terminal device according to claim 1, in order to make the directivity peak of the antenna element be in the vicinity of the front surface of the antenna element, the high-frequency wave is passed through the conduction connection point as described in claim 2. The built-in substrate or the built-in conductor plate connected to the substrate so as to be conductive may be disposed so as to face the antenna element on the side opposite to the side where the antenna element is disposed with the high-frequency substrate interposed therebetween.

  This is because, when the built-in substrate or the built-in conductor plate is disposed so as not to face the antenna element with the high-frequency substrate interposed therebetween (see FIG. 15A), the directivity peak of the antenna element is the antenna element. When the built-in substrate or the built-in conductor plate is disposed so as to face the antenna element with the high-frequency substrate interposed therebetween (see FIG. 14A). This is because the directivity peak of the antenna element is near the front of the antenna element (see FIG. 14B).

  Also, in the wireless portable terminal device according to claim 1 or 2, in order for the peak of directivity of the antenna element to be in the vicinity of the front of the antenna element, one end is conductive as described in claim 3. It is connected to the connection point, and includes a conductive connection line that is a connection line for connecting the high-frequency board and the built-in board or the built-in conductor plate so that conduction is possible. It is preferable to be connected to the internal substrate or the internal conductor plate at a position separated by λ / 10 or more.

The reason for this will be described below.
First, when one end of the conductive connection line is connected to the internal substrate in the vicinity of the power supply unit (see FIG. 10A), one end of the conductive connection line is separated from the power supply unit by a distance slightly shorter than λ / 10. When the antenna element is connected to the internal substrate at a position (see FIG. 11A), the directivity peak of the antenna element deviates from the front of the antenna element (see FIGS. 10B and 11B). ).

  On the other hand, when one end of the conductive connection line is connected to the built-in substrate at a position away from the power supply unit by λ / 10 (see FIG. 12A), one end of the conductive connection line is from the power supply unit by λ / 10. When the antenna element is connected to the built-in substrate at a slightly long distance (see FIG. 13A), the directivity peak of the antenna element is near the front of the antenna element (FIG. 12B, FIG. 13 (b)).

  When one end of the conductive connection line is connected to the built-in substrate at a position sufficiently longer than λ / 10 from the power supply unit (see FIG. 2), the directivity peak of the antenna element is (See FIG. 4B).

  As described above, when one end of the conductive connection line is connected to the built-in substrate 8 at a position where the distance from the power feeding unit is λ / 10 or more, the directivity peak of the antenna element is near the front of the antenna element 3. Become.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall configuration diagram of a wireless portable terminal device 1 to which the present invention is applied, and FIG. 2 is a perspective view of a high-frequency substrate 4 and a built-in substrate 8.

  As shown in FIG. 1, the wireless portable terminal device 1 is an antenna element for performing data communication between a substantially rectangular parallelepiped housing 2 that accommodates the components of the wireless portable terminal device 1 and an RF tag (not shown). 3, a high-frequency substrate 4 on which the antenna element 3 is mounted, a camera unit 5 that reads a bar code (not shown), a display panel 6 that displays various information, and a plurality of operation keys 7 that can be operated by a user. The built-in substrate 8 on which a control circuit for controlling the wireless portable terminal device 1 is mounted, and a battery 9 that supplies power to the components of the wireless portable terminal device 1.

  Of these, the housing 2 is provided with a display panel 6 and operation keys 7 on a surface plate 11 forming the surface 2a thereof. The display panel 6 is disposed on the front end side surface 12 side in the longitudinal direction, and the operation keys 7 are disposed on the rear end side surface 13 side in the longitudinal direction.

  The housing 2 has a camera unit 5 and a battery 9 mounted on a back plate 14 forming the back surface 2b. A camera unit 5 is disposed on the front end side surface 12 side in the longitudinal direction with the high-frequency substrate 4 interposed therebetween, and a battery 9 is disposed on the rear end side surface 13 side in the longitudinal direction.

  The high-frequency substrate 4 is disposed at a position that does not face the operation key 7. This is to prevent the antenna element 3 from being arranged around the operation key 7 which is a part that is frequently touched by the human body.

  Further, as shown in FIG. 2, the high-frequency substrate 4 is formed in a rectangular shape. And the antenna element 3 is arrange | positioned along this 1 side 4a on the edge part of 1 side 4a of 4 sides 4a, 4b, 4c, 4d which comprises the rectangle of the high frequency board | substrate 4. As shown in FIG. Note that a feeding portion 3a of the antenna element 3 is provided on the surface 4e of the high-frequency substrate 4 at a position near the antenna element 3 and near the side 4b.

  The high frequency substrate 4 has four sides 4a, 4b, 4c and 4d each having a length of λ / 4 or less. Here, “λ” indicates the wavelength of the radio wave transmitted and received by the antenna element 3. In this embodiment, “λ” is 950 MHz. The high-frequency substrate 4 is provided with a connection point 21 to which one end of a connection line 20 for conducting the high-frequency substrate 4 and the built-in substrate 8 is connected.

  The connection point 21 is provided on the edge of at least one of the three sides 4b, 4c, and 4d other than the side 4a of the edge where the antenna element 3 is disposed. In the present embodiment, the connection point 21 is disposed at a corner where the side 4c and the side 4d intersect.

  FIG. 3A is a diagram showing a simulation result of the direction of the current flowing through the high-frequency substrate 4 when the antenna element 3 is fed when the high-frequency substrate 4 and the built-in substrate 8 are not connected to be conductive. . FIG. 3B is a diagram showing a simulation result of the directivity of the antenna element 3 in the situation shown in FIG. In FIG. 3 (b), the higher the radiation intensity of the antenna element 3, the darker the color.

  As shown in FIG. 3A, when the antenna element 3 is fed, a current flows along the longitudinal direction of the antenna element 3 (see arrow Y1), and on the edges of the sides 4b and 4c. A current flows along the sides 4b and 4c (see arrows Y2 and Y3). On the other hand, no current flows along the one side 4d on the edge of the side 4d. The side 4b is a side that intersects the side 4a and in which the power feeding portion 3a is disposed in the vicinity. The side 4c is a side parallel to the side 4a. 4d is a side parallel to the side 4b.

  As a result, a current that is oblique with respect to the side 4a flows in the center of the high-frequency substrate 4 (see arrow Y4). For this reason, the directivity peak of the antenna element 3 deviates from the front of the antenna element 3 as shown in FIG. The phenomenon shown in FIGS. 3A and 3B occurs when the four sides of the high-frequency substrate 4 are λ / 4 or less.

  FIG. 4A shows a simulation of the direction of current flowing through the high-frequency substrate 4 when the antenna element 3 is fed when the high-frequency substrate 4 and the built-in substrate 8 are connected to each other through the connection point 21 so as to be conductive. It is a figure which shows a result. FIG. 4B is a diagram showing a simulation result of the directivity of the antenna element 3 in the situation shown in FIG.

  As shown in FIG. 4A, when the antenna element 3 is fed, a current flows along the longitudinal direction of the antenna element 3 (see arrow Y11), and the edges of the sides 4b, 4c, and 4d. Above, current flows along the sides 4b, 4c, 4d (see arrows Y12, Y13, Y14, Y15).

  Thereby, the electric current which becomes a substantially parallel direction with respect to the edge | side 4a flows into the center part of the high frequency board | substrate 4 (refer arrow Y16). For this reason, as shown in FIG. 4B, the directivity peak of the antenna element 3 is in the vicinity of the front surface of the antenna element 3.

FIG. 5 is a plan view of the high-frequency substrate 4 showing the arrangement of the connection points 21 in the simulation results shown in FIGS.
FIG. 6 shows a cross section along the side 4d from the corner K1 (see FIG. 5) where the side 4a and the side 4d intersect to the corner K2 (see FIG. 5) where the side 4c and the side 4d intersect. It is a figure which shows the simulation result of the directivity of the antenna element 3 when the connection point 21 is moved by equal intervals (refer arrow Y21 of FIG. 5). 6 (a), (b), (c), (d), (e), (f), (g), (h), (i) are respectively positions P1, P2, P3 in FIG. The simulation result when the connection point 21 is arrange | positioned at P4, P5, P6, P7, P8, P9 is shown.

  In FIG. 7, the connection points 21 are equally spaced along the side 4c from the corner K2 where the side 4c and the side 4d intersect to the corner K3 (see FIG. 5) where the side 4b and the side 4c intersect. FIG. 6 is a diagram showing a simulation result of directivity of the antenna element 3 when the position is moved (see arrow Y22 in FIG. 5). 7 (a), (b), (c), (d), (e), (f), (g), (h), (i), (j), and (k) are respectively shown in FIG. The simulation results when the connection points 21 are arranged at the positions P9, P10, P11, P12, P13, P14, P15, P16, P17, P18, and P19 are shown.

  FIG. 8 shows connection points at equal intervals along the side 4b from the corner K3 where the side 4b and the side 4c intersect to the corner K4 where the side 4b and the antenna element 3 intersect (see FIG. 5). 6 is a diagram showing a directivity simulation result of the antenna element 3 when 21 is moved (see arrow Y23 in FIG. 5). 8 (a), (b), (c), (d), (e), (f), (g), (h), (i) are respectively the positions P19, P20, P21, FIG. The simulation result when the connection point 21 is arrange | positioned at P22, P23, P24, P25, P26, P27 is shown.

In FIGS. 6 to 8, the higher the radiation intensity of the antenna element 3, the darker the color.
As shown in FIGS. 6 to 8, by arranging the connection points 21 at P <b> 1 to P <b> 27, the directivity peak position of the antenna element 3 can be changed to the directivity peak when the connection point 21 is not arranged. It can be moved from the position.

  FIG. 9A is a plan view of the high-frequency substrate 4 showing the arrangement of the connection points 21 in the simulation result shown in FIG. 9B. FIG. 9B is a diagram showing a simulation result of the directivity of the antenna element 3 when the connection point 21 is arranged at the position shown in FIG.

  As shown in FIG. 9A, when the connection point 21 is arranged at the center of the high-frequency substrate 4, the directivity peak position of the antenna element 3 is connected as shown in FIG. It hardly changes compared to the position of the directivity peak when the point 21 is not arranged.

  As described above, according to the wireless portable terminal device 1, the direction of the radio wave radiated from the antenna element 3 can be controlled. In addition, since the connection point 21 is disposed at the edge of the high-frequency substrate 4, it is possible to suppress a reduction in the degree of freedom in design of the high-frequency substrate 4 due to the connection point 21 being provided.

  FIG. 10A is a plan view of the high-frequency substrate 4 and the built-in substrate 8 showing that one end 20a of the connection line 20 is connected to the built-in substrate 8 in the vicinity of the power feeding portion 3a. FIG. 11A is a plan view of the high-frequency substrate 4 and the built-in substrate 8 showing that the one end 20a of the connection line 20 is connected to the built-in substrate 8 at a position slightly shorter than λ / 10 from the power feeding portion 3a. It is. FIG. 12A is a plan view of the high-frequency substrate 4 and the built-in substrate 8 showing that the one end 20a of the connection line 20 is connected to the built-in substrate 8 at a position away from the power feeding unit 3a by λ / 10. FIG. 13A is a plan view of the high-frequency substrate 4 and the built-in substrate 8, showing that the one end 20 a of the connection line 20 is connected to the built-in substrate 8 at a position slightly longer than λ / 10 from the power feeding unit 3 a. It is.

  FIGS. 10 (b), 11 (b), 12 (b), and 13 (b) are respectively shown in FIGS. 10 (a), 11 (a), 12 (a), and 13 (a). It is a figure which shows the directivity simulation result of the antenna element 3 in the situation shown. In FIG. 10B, FIG. 11B, FIG. 12B, and FIG. 13B, the higher the radiation intensity of the antenna element 3, the darker the color.

  As shown in FIGS. 10 (a) and 11 (a), when one end 20a of the connection line 20 is connected to the built-in substrate 8 at a position where the distance from the power feeding portion 3a is less than λ / 10, As shown in FIG. 10B and FIG. 11B, the directivity peak of the antenna element 3 is deviated from the front of the antenna element 3.

  On the other hand, as shown in FIGS. 12 (a) and 13 (a), the connection line 20 is connected at a position where one end 20a of the connection line 20 is separated from the power feeding portion 3a by λ / 10 and a distance slightly longer than λ / 10. When one end of 20 is connected to the built-in substrate 8, the directivity peak of the antenna element 3 is near the front of the antenna element 3, as shown in FIGS. 12 (b) and 13 (b). As shown in FIG. 2, when one end 20a of the connection line 20 is connected to the built-in substrate 8 at a position sufficiently longer than λ / 10 from the power supply portion 3a, as shown in FIG. Further, the directivity peak of the antenna element 3 is in the vicinity of the front surface of the antenna element 3. Therefore, when one end 20a of the connection line 20 is connected to the built-in substrate 8 at a position where the distance from the power supply unit 3a is λ / 10 or more, the directivity peak of the antenna element 3 is the front of the antenna element 3. Become a neighborhood.

  10 to 13 show the results when “λ” is 950 MHz. However, even when “λ” is another wavelength, the directivity of the antenna element 3 can be reduced when the one end 20a of the connection line 20 is connected to the built-in substrate 8 at a position of λ / 10 or more from the power supply unit 3a. A simulation result that the peak is near the front of the antenna element 3 was obtained.

  FIGS. 14A and 15A are perspective views showing the positional relationship between the high-frequency substrate 4 and the built-in substrate 8 in the simulation results shown in FIGS. 14B and 15B, respectively. 14 (b) and 15 (b) show simulations of directivity of the antenna element 3 when the high-frequency substrate 4 and the built-in substrate 8 are arranged as shown in FIGS. 14 (a) and 15 (a), respectively. It is a figure which shows a result. In FIGS. 14A and 15A, the higher the radiation intensity of the antenna element 3, the darker the color.

  As shown in FIG. 14A, when the built-in substrate 8 is disposed so as to face the antenna element 3 with the high-frequency substrate 4 interposed therebetween, as shown in FIG. The directivity peak becomes near the front of the antenna element 3.

  On the other hand, as shown in FIG. 15A, when the built-in substrate 8 is disposed so as not to face the antenna element 3 with the high-frequency substrate 4 interposed therebetween, as shown in FIG. The directivity peak of the element 3 deviates from the front of the antenna element 3.

In the embodiment described above, the connection point 21 is a conductive connection point in the present invention, and the connection line 20 is a conductive connection line in the present invention.
As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example, As long as it belongs to the technical scope of this invention, a various form can be taken.

  For example, in the above embodiment, the high frequency substrate 4 and the built-in substrate 8 are connected via the connection line 20. However, when a conductor plate is built in the wireless portable terminal device 1, the high-frequency substrate 4 and the conductor plate may be connected via the connection line 20. This conductor plate is a built-in conductor plate in the present invention.

  In the above-described embodiment, an inverted F antenna is used as an antenna element. However, the present invention is not limited to this, and the antenna has a small size and a low attitude, and its directivity changes due to the influence of current generated on the mounting board. (Reverse L antenna, PIFA, chip antenna, etc.) may be used.

1 is an overall configuration diagram of a wireless portable terminal device 1. FIG. 2 is a perspective view of a high-frequency substrate 4 and a built-in substrate 8. FIG. It is a figure which shows the direction of the electric current which flows into the high frequency board | substrate 4 when there is no connection point 21, and the simulation result of directivity. It is a figure which shows the direction of the electric current which flows into the high frequency board | substrate 4, when there exists a connection point 21, and the simulation result of directivity. 3 is a plan view of the high-frequency substrate 4 showing the arrangement of connection points 21. FIG. It is a 1st figure which shows the directivity simulation result at the time of moving the connection point 21 at equal intervals. It is a 2nd figure which shows the directivity simulation result at the time of moving the connection point 21 at equal intervals. It is a 3rd figure which shows the directivity simulation result at the time of moving the connection point 21 at equal intervals. It is a figure which shows the top view of the high frequency board | substrate 4 which shows arrangement | positioning of the connection point 21, and the simulation result of directivity. It is a figure which shows the position of the end of the connection line 20, and the directivity simulation result. It is a figure which shows the position of the end of the connection line 20, and the directivity simulation result. It is a figure which shows the position of the end of the connection line 20, and the directivity simulation result. It is a figure which shows the position of the end of the connection line 20, and the directivity simulation result. It is a figure which shows the positional relationship of the high frequency board | substrate 4 and the built-in board | substrate 8, and the simulation result of directivity. It is a figure which shows the positional relationship of the high frequency board | substrate 4 and the built-in board | substrate 8, and the simulation result of directivity.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Wireless portable terminal device, 2 ... Housing, 3 ... Antenna element, 3a ... Feeding part, 4 ... High frequency board, 5 ... Camera unit, 6 ... Display panel, 7 ... Operation key, 8 ... Built-in board, 9 ... Battery, 20 ... Connection line, 21 ... Connection point

Claims (3)

An antenna element for transmitting and receiving a radio wave having a wavelength of λ is mounted, and a wireless portable terminal device incorporating a high-frequency substrate having a rectangular shape with all four sides being λ / 4 or less,
The antenna element is arranged along one side of the edge of one of the four sides constituting the rectangle of the high-frequency substrate,
The high-frequency substrate is
Conduction that is a connection point for electrically connecting the built-in substrate, which is a substrate built in the wireless portable terminal device, or the built-in conductor plate, which is a conductive plate built in the wireless portable terminal device, and the high-frequency substrate. A connection point is provided on an edge part of at least one of three sides other than one side of the edge part where the antenna element is disposed. The wireless portable terminal device. The built-in board or the built-in conductor plate connected to be conductive with the high-frequency board through the conduction connection point,
The wireless portable terminal device according to claim 1, wherein the wireless mobile terminal device is disposed so as to face the antenna element on a side opposite to the side where the antenna element is disposed with the high-frequency substrate interposed therebetween. One end is connected to the conduction connection point, and includes a conduction connection line that is a connection line for connecting the high-frequency substrate and the built-in substrate or the built-in conductor plate in a conductive manner.
The other end of the conductive connection line is connected to the built-in substrate or the built-in conductor plate at a position separated by λ / 10 or more from the feeding portion of the antenna element. Wireless portable terminal device.