JP2008219661A - Antenna device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a broadband antenna system into a folded shape without impairing the simplification of a process or reliability, thereby improving a freedom of mounting to a compact wireless apparatus. <P>SOLUTION: The antenna system 1 includes a plurality of conductor patterns formed along surfaces formed by a substrate 2 or a flexible substrate 3. The flexible substrate 3 is disposed so as to approximately cross the substrate 2 on one edge of the substrate 2. A first conductor pattern 11 is formed planar on the substrate 2, and a second conductor pattern 12 is formed planar within a range including the edge approximately crossing the flexible substrate 3. The side of the second conductor pattern 12 opposite to the edge faces one side of the first conductor pattern 11 approximately in parallel. The second conductor pattern 12 is connected with a wireless circuit 21 at a feed point 23 by a feeder 22, so that power is fed to the second conductor pattern. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an antenna device, and more particularly to an antenna device comprising a conductor pattern formed on a substrate or the like.

  An antenna device including a conductor pattern formed in a planar shape on a substrate or the like is also referred to as a planar antenna, and can be used for a small wireless device such as a mobile phone because it has a low profile.

  As one type of such an antenna device, for example, a device that is designed to have multiple resonances so that it can be used together with a mobile phone, a global navigation system (GPS) receiver, and a telematic system (emergency call system) is known ( For example, see Patent Document 1.)

The applicant has filed a patent application for an invention that further increases the number of resonances of such an antenna device to increase the bandwidth and eliminates the need for a matching circuit (see Patent Document 2).
JP 2003-318631 A (2nd, 3rd page, FIG. 1) JP 2006-33069 A (2nd, 4th, 5th pages, FIG. 1)

  The conventional technique described in Patent Document 1 described above can realize the required antenna characteristics at each resonance point, but it is possible to improve the characteristics of the band sandwiched between these resonance points to achieve a wider band. There is a problem that it is difficult.

  The conventional technique described in Patent Document 2 described above is intended to improve the above-mentioned problems including Patent Document 1 and to increase the bandwidth. By the way, in a small wireless device such as a cellular phone, since the mounting space for the antenna device is limited, it may be required to form the antenna device so that it is partially bent. In order to cope with such a case, it is conceivable to develop the conventional technique described in Patent Document 2 using a material such as a flexible substrate.

  Therefore, for example, it is conceivable to form the planar antenna described in Patent Document 2 on a flexible substrate. However, simply forming such a planar antenna on a flexible board requires a feed line (for example, a wire such as a coaxial cable) to and from a radio circuit mounted on the board (fixed, usually not flexible). There is a problem of becoming.

  Further, a method is conceivable in which a conductor pattern formed flat on the substrate side and a conductor pattern formed along the surface formed by the flexible substrate are electrically connected over the entire width of both conductor patterns. However, such a method requires, for example, soldering over a relatively wide width of the conductor pattern, and is problematic from the viewpoint of simplification of the process and reliability.

  The present invention has been made in order to solve the above-described problems, and allows a wideband antenna device to be bent without simplifying the process or impairing reliability, and is free to be mounted on a small wireless device. The purpose is to improve the degree.

  In order to achieve the above object, an antenna device of the present invention is formed in a planar shape in a range including a first conductor pattern formed in a planar shape on a substrate and one end side of the substrate, and the end side Power can be supplied in the vicinity of one side of the first conductor pattern that is substantially parallel to one side of the first conductor pattern and that is opposite to the one side of the first conductor pattern. A second conductor pattern is formed along a surface formed by a flexible substrate disposed so as to substantially intersect the substrate and the edge, and is connected to the second conductor pattern in the vicinity of the edge. And a third conductor pattern.

  ADVANTAGE OF THE INVENTION According to this invention, the bending shape of a broadband antenna apparatus is enabled, without impairing a process simplification and reliability, and the freedom degree for mounting in a small radio | wireless apparatus can be improved.

  Embodiments of the present invention will be described below with reference to the drawings.

  Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view illustrating a configuration of an antenna device 1 according to a first embodiment of the invention. The antenna device 1 is configured to include a plurality of conductor patterns formed along surfaces formed by the substrate 2 or the flexible substrate 3 included in the configuration of the wireless device (not shown) as a whole. The flexible substrate 3 is disposed so as to substantially intersect the substrate 2 at one end side of the substrate 2 (which corresponds to the upper side (or rear side in FIG. 1)).

  Here, “substantially intersect” means that the substrate 2 and the flexible substrate 3 are in contact with each other and spatially intersect or are close to each other (in the case of no contact or when the flexible substrate 3 is stretched and the substrate 2 is formed of multiple layers). 1 is included), and the angle of intersection is not limited at all. The flexible substrate 3 does not have to be perpendicular to the substrate 2 and may have a curved surface.

  A first conductor pattern 11 is formed on the substrate 2 in a planar shape. A second conductor pattern 12 is formed in a planar shape in the range of the substrate 2 including the above-mentioned end side that substantially intersects the flexible substrate 3. The 2nd conductor pattern 12 makes | forms the shape enclosed by the edge | side side of said edge side, and the other side. Among these sides, one side other than the end side (in FIG. 1, the side opposite to the end side) faces one side of the first conductor pattern 11 substantially in parallel.

  A radio circuit 21 is provided on the substrate 2. The radio circuit 21 is electrically connected to the second conductor pattern 12 via a feeder line 22 indicated by a broken line. The feeder line 22 can be formed by a conductor pattern of an inner layer assuming that the substrate 2 is composed of multiple layers, for example. The feed line 22 is connected to the second conductor pattern 12 at a feed point 23 located in the vicinity of the side of the second conductor pattern 12 facing the first conductor pattern 11.

  With the above connection, the second conductor pattern 12 can be fed at the feeding point 23. The second conductor pattern 12 may be unbalanced with the first conductor pattern 11 as the ground side, or may be balanced with the first conductor pattern 11.

  A third conductor pattern 13 is formed on the flexible substrate 3 along the surface formed by the flexible substrate 3. The third conductor pattern 13 is a second conductor pattern at a connection point 31 and a connection point 32 (respectively surrounded by a dotted ellipse) positioned near the above-mentioned end side where the substrate 2 substantially intersects the flexible substrate 3. 12 is connected.

  There are several possible methods for the above connection at the connection point 31 and the connection point 32. With reference to FIG. 2, the example of those connection methods is demonstrated. FIG. 2 is a diagram illustrating an example of the above connection method when the substrate 2 and the flexible substrate 3 are viewed in the direction of the block arrow shown on the left side of FIG. FIG. 2A shows that the substrate 2 (the second conductor pattern 12 formed on the substrate) and the flexible substrate 3 (the third conductor pattern 13 formed on the substrate) are connected to each other at the connection location 31 and the connection location 32 by soldering. Represents the state of being performed.

  FIG. 2 (b) shows that the substrate 2 (the second conductor pattern 12 formed on the substrate 2) and the flexible substrate 3 (the third conductor pattern 13 formed on the substrate 2) are connected by the power supply pins 24 provided on the substrate 2. 31 and the connection location 32 represent the connected state. FIG. 2 (c) shows that the board 2 (the second conductor pattern 12 formed on the substrate 2) and the flexible board 3 (the third conductor pattern 13 formed on the substrate 2) are connected by the leaf spring 25 provided on the substrate 2. 31 and the connection location 32 represent the connected state. Since the connection method illustrated in FIG. 2B or FIG. 2C does not require soldering, it is effective in simplifying the process.

  In the antenna device 1 configured as shown in FIG. 1, the second conductor pattern 12 and the third conductor pattern 13 are connected at the connection location 31 and the connection location 32, and the conductor pattern is partially cut away. It can be considered that the planar antenna element including various parts is formed in a bent state. On the other hand, when it is assumed that the third conductor pattern 13 is connected to the second conductor pattern 12 over the entire width at the end side where the substrate 2 substantially intersects the flexible substrate 3, the planar shape does not include a discontinuous portion. It can be considered that the antenna element is formed in a folded state.

  About the result of comparing the characteristics when the antenna device 1 is configured as shown in FIG. 1 and when the planar antenna element that does not include discontinuous portions is formed as described above by simulation. This will be described with reference to FIGS. FIG. 3 is a diagram illustrating a model of the antenna device 1 used in the simulation.

  In the model, the second conductor pattern 12 and the third conductor pattern 13 are connected at the connection location 31 and the connection location 32, thereby discontinuous locations (the part of the third conductor pattern 13 that is cut off at the bottom in the drawing). This is equivalent to a planar antenna element formed so as to be developed on the same plane as the first conductor pattern 11. The configurations denoted by reference numerals 11 to 13 and 23 in the drawing are the same as those shown in FIG. The number attached to the double-pointed arrow indicates the dimension (unit: millimeter) of the corresponding part.

  In FIG. 3, the length of the side of the second conductor pattern 12 facing the first conductor pattern 11 is 11.4 mm. The distance between the opposing sides of the first conductor pattern 11 and the second conductor pattern 12 is 0.5 mm. It is desirable that the distance between the opposing sides is approximately one tenth or less of the length of the side of the second conductor pattern 12 facing the first conductor pattern 11 (this point is described in Patent Document 2). (See paragraph 0013.) The values are selected in this way.

  FIG. 4 is a diagram showing the frequency characteristic of the voltage standing wave ratio (VSWR) at the feeding point 23 obtained by simulation using the model of the antenna device 1 shown in FIG. The horizontal axis is the frequency (unit is GHz), and the vertical axis is the VSWR expressed as a true number. As shown in FIG. 4, according to the model of the antenna device 1, the VSWR is 1.8 or less over the frequency band of 3 GHz to 10 GHz.

  FIG. 5 shows a model in which the model of the antenna device 1 shown in FIG. 3 is modified so that there is no discontinuous portion (the third conductor pattern 13 is connected to the second conductor pattern 12 over its entire width). It is a figure which calculates | requires and represents the frequency characteristic of VSWR in the feeding point 23 by simulation using (not shown). The horizontal and vertical axes are the same as those in FIG. Also in FIG. 5, VSWR is 1.8 or less over a frequency band of 3 GHz to 10 GHz. That is, it can be seen that the model of the antenna device 1 shown in FIG. 3 shows substantially the same frequency characteristics of the VSWR regardless of whether or not the discontinuous portion is included.

  In the antenna device 1, it is conceivable that the connection width at the connection location 31 and the connection location 32 between the second conductor pattern 12 and the third conductor pattern 13 affects the characteristics. The result of evaluating this point by the same simulation as described above will be described with reference to FIGS. FIG. 6 is a diagram illustrating the connection width “d”, which is an evaluation parameter, in the simulation model illustrated in FIG. 3.

  FIG. 7 is a diagram in which three values are given to the parameter “d”, and the frequency characteristics of the VSWR at the feed point 23 are obtained by simulation for each value. The horizontal and vertical axes are the same as those in FIG. In the curves representing the VSWR characteristics in FIG. 7, the solid line corresponds to d = 2 mm, the dotted line corresponds to d = 1 mm, and the alternate long and short dash line corresponds to d = 0.5 mm. In addition, in the case of d = 2 mm, it corresponds with the characteristic shown in FIG.

  As apparent from FIG. 7, when the value of the parameter “d” is 1 mm or less, the characteristic that the value of VSWR is 2 or less over the frequency band of 2.5 to 10 GHz is obtained. If the value of the parameter “d” is reduced to 0.5 mm, the value of VSWR exceeds 2 in the frequency band of 4 GHz or higher, but even in this case, there is a possibility that it can be used depending on the frequency.

  Characteristics exhibited by various modifications of the antenna device 1 will be described with reference to FIGS. 8 to 13. In FIG. 8, the second conductor pattern 12 and the third conductor pattern 13 of the antenna device 1 are connected only at the connection location 31, and the second conductor pattern 12 and the third conductor pattern 13 are connected at a location corresponding to the connection location 32. It is a figure showing the modification which is not.

  In FIG. 8, the 3rd conductor pattern corresponding to the 3rd conductor pattern 13 of the antenna apparatus 1 attaches | subjects and represents the code | symbol 13a. The structure which attached | subjected the other code | symbol is the same as what was represented to FIG. 1 or FIG. 3, respectively. Since the dimensions of each part are the same as those in FIG.

  FIG. 9 is a diagram showing the frequency characteristics of VSWR at the feeding point 23 obtained by simulation using a modification of the antenna device 1 shown in FIG. The horizontal and vertical axes are the same as those in FIG. As is clear from comparison of FIG. 9 with FIG. 4, when the second conductor pattern 12 and the third conductor pattern 13 are connected at only one place, the frequency is 2.5 GHz to 10 GHz as compared with the case where they are connected at two places. The VSWR characteristic deteriorates over a certain band.

  However, in a frequency band of 2 to 2.5 GHz, a better VSWR characteristic is shown when the connection is made only at one location. From this result, it can be seen that, for example, even in the modification of the antenna device 1 as shown in FIG.

  FIG. 10 shows a model in which the model of the antenna device 1 shown in FIG. 3 is modified so that there is no discontinuous portion (the third conductor pattern 13 is connected to the second conductor pattern 12 over its entire width). 5 is a diagram showing a modified example in which only the left half of the second conductor pattern 12 and the third conductor pattern 13 is left in the figure.

  In FIG. 10, the second conductor pattern corresponding to the second conductor pattern 12 of the antenna device 1 is denoted by reference numeral 12 b. A third conductor pattern corresponding to the third conductor pattern 13 of the antenna device 1 is denoted by reference numeral 13b. The structure which attached | subjected the other code | symbol is the same as what was represented to FIG. 1 or FIG. 3, respectively. About the dimension of each part, description is abbreviate | omitted similarly to FIG.

  FIG. 11 shows the third conductor pattern 13b located between the second conductor pattern 12b and the third conductor pattern 13b in the modification of FIG. 10 at the left and right two places in the figure. It is a figure showing the modification which cut off the lowest part. The third conductor pattern corresponding to the third conductor pattern 13 of the antenna device 1 is denoted by reference numeral 13c. The structure which attached | subjected the other code | symbol is the same as what was represented to FIG. 10, respectively. About the dimension of each part, description is abbreviate | omitted similarly to FIG.

  FIG. 12 shows a modification in which the connection portion of the second conductor pattern 12b and the third conductor pattern 13b is limited to the left in the drawing in the modification of FIG. 10, and the lowermost portion of the third conductor pattern 13b is cut off in the drawing. FIG. The third conductor pattern corresponding to the third conductor pattern 13 of the antenna device 1 is denoted by reference numeral 13d. The structure which attached | subjected the other code | symbol is the same as what was represented to FIG. 10, respectively. About the dimension of each part, description is abbreviate | omitted similarly to FIG.

  FIG. 13 is a diagram showing the frequency characteristics of VSWR at the feeding point 23 obtained by simulation using a modification of the antenna device 1 shown in FIGS. 10 to 12. The horizontal and vertical axes are the same as those in FIG. In the curves representing the VSWR characteristics in FIG. 13, the solid line represents the characteristics of the modified example of FIG. 10, the dotted line represents the characteristics of the modified example of FIG. 11, and the alternate long and short dash line represents the characteristics of the modified example of FIG.

  As is clear from FIG. 13, there is almost no difference between the characteristic of the modified example of FIG. 10 represented by a solid line and the characteristic of the modified example of FIG. 11 represented by a dotted line, and the second conductor pattern 12b and the second characteristic as shown in FIG. It can be seen that it is sufficient to connect the three conductor patterns 13b to the left and right two locations in the figure.

  Further, when the characteristic represented by the solid line or the dotted line in FIG. 13 is compared with the characteristic in FIG. 4 or 5, as a result of the deformation that leaves only the left half of the second conductor pattern 12 and the third conductor pattern 13 of the antenna device 1. It can be seen that the VSWR deteriorates to a maximum of about 2.3 in the frequency band of 5 to 7.5 GHz. However, similarly to the modification of FIG. 8, the modifications of FIGS. 10 to 12 may be used depending on the frequency.

  According to the first embodiment of the present invention, a part of the elements of the broadband antenna apparatus is provided on the substrate side and the other part is provided on the flexible substrate side for efficient connection, thereby freeing the characteristics and shape of the antenna. The degree can be made compatible.

  Hereinafter, Example 2 of the present invention will be described with reference to FIGS. 14 and 15. FIG. 14 is a perspective view illustrating the configuration of the antenna device 5 according to the second embodiment of the invention. The antenna device 5 is configured to include a plurality of conductor patterns formed along surfaces formed by the substrate 6 or the housing 7 included in the configuration of the wireless device (the above-described wireless device and the housing 7). The whole is not shown.)

  The surface of the housing 7 on which the conductor pattern is formed is disposed so as to substantially intersect the substrate 6 at one end side of the substrate 6. Here, “substantially intersect” has the same meaning as described in the first embodiment. The surface of the housing 7 on which the above-described conductor pattern is formed does not have to be perpendicular to the substrate 6 and may be a curved surface.

  A first conductor pattern 51 is formed in a planar shape on the substrate 6. A second conductor pattern 52 is formed in a planar shape in a range including the above-described end side that substantially intersects the surface of the housing 7 on which the conductor pattern is formed. The second conductor pattern 52 has a shape surrounded by the side on the end side and the other sides. Among these sides, one side other than the end side (in FIG. 14, the side opposite to the end side) faces the one side of the first conductor pattern 51 substantially in parallel.

  A radio circuit 61 is provided on the substrate 6. The radio circuit 61 is electrically connected to the second conductor pattern 52 via the feeder line 62. The power supply line 62 can be formed by a conductor pattern of an inner layer assuming that the substrate 6 is composed of multiple layers, for example. The feed line 62 is connected to the second conductor pattern 52 at a feed point 63 located in the vicinity of the side of the second conductor pattern 52 that faces the first conductor pattern 51.

  With the above connection, the second conductor pattern 52 can be fed at the feeding point 63. The second conductor pattern 52 may be unbalanced with the first conductor pattern 51 as the ground side, or may be balanced with the first conductor pattern 51.

  A third conductor pattern 53 is formed on a part of the casing 7 by a method such as plating or sticking along a surface formed by the casing 7. The third conductor pattern 53 is connected to the second conductor pattern 52 at the connection point 71 and the connection point 72 located in the vicinity of the end side where the substrate 6 substantially intersects the surface of the housing 7. As shown in FIG. 14, the third conductor pattern 53 may be formed on the front side surface (inner surface of the housing 7), or may be formed on the opposite surface (outer surface of the housing 7). .

  There are several possible methods for the above connection at the connection location 71 and the connection location 72. With reference to FIG. 15, the example of those connection methods is demonstrated. FIG. 15 is a diagram for explaining an example of the above-described connection method when a part of the surface of the substrate 6 and the housing 7 is viewed in the direction of the block arrow shown on the left side of FIG.

  FIG. 15A shows a state in which the substrate 6 (the second conductor pattern 52 formed on the substrate 6) and the third conductor pattern 53 formed on the inner surface of the housing 7 are connected by surface contact. The third conductor pattern 53 has a portion extending on the surface of the rib 7 a provided on the inner surface of the housing 7. When the substrate 6 (the second conductor pattern 52 formed thereon) is in surface contact with the extended portion, the connection at the connection location 71 and the connection location 72 is established. If the substrate 6 is pressed from top to bottom in FIG. 15A, the reliability of surface contact can be improved.

  FIG. 15B shows a state in which the substrate 6 (the second conductor pattern 52 formed on the substrate 6) and the third conductor pattern 53 formed on the inner surface of the housing 7 are connected by a spring. The third conductor pattern 53 has a portion extending on the surface of the rib 7 a provided on the inner surface of the housing 7. When the spring 64 provided on the substrate 6 and connected to the second conductor pattern 52 contacts the extended portion, the connection at the connection location 71 and the connection location 72 is established.

  FIG. 15C shows a mechanical relationship between the substrate 6 (the second conductor pattern 52 formed on the substrate 6) and the third conductor pattern 53 formed on the inner surface of the housing 7. It represents a state of being connected through a junction. The third conductor pattern 53 has a portion extending to the inside of the board insertion hole 7 c provided at the tip of the protrusion 7 b provided on the inner surface of the housing 7. When a part of the edge of the substrate 6 that substantially intersects the surface of the housing 7 is inserted into the substrate insertion hole 7c, the substrate 6 (the second conductor pattern 52 formed thereon) contacts the extended portion. By doing so, the connection at the connection location 71 and the connection location 72 is established.

  In FIG. 15D, the substrate 6 (the second conductor pattern 52 formed on the substrate 6) and the third conductor pattern 53 formed on the outer surface of the housing 7 are connected through a via hole provided in the housing 7. Represents a state. The third conductor pattern 53 is formed by plating or affixing to the outer surface of the housing 7 and has a portion extended to the surface of the rib 7e provided on the inner surface of the housing 7 through the via hole 7d. When the substrate 6 (the second conductor pattern 52 formed thereon) is in surface contact with the extended portion, the connection at the connection location 71 and the connection location 72 is established. If the substrate 6 is pressed from the bottom to the top in FIG. 15D, the certainty of the surface contact can be improved.

  In the antenna device 5 configured as shown in FIG. 14, the second conductor pattern 52 and the third conductor pattern 53 are connected at the connection location 71 and the connection location 72, and the conductor pattern is partially cut away. It can be considered that the planar antenna element including various parts is formed in a bent state.

  Therefore, the antenna device 5 is equivalent to the antenna device 1 described in the first embodiment, and the characteristics and various modifications of the antenna device 1 described with reference to FIGS. 3 to 13 are applied to the antenna device 5 as they are. can do.

  According to the second embodiment of the present invention, an antenna device equivalent to that of the first embodiment can be configured even when a conductor pattern formed on a casing of a wireless device instead of a flexible substrate is used as a radiating element. An effect is obtained.

  In the description of each of the above embodiments, the shape, configuration, arrangement, and the like of the antenna element, the substrate, the housing, and the connection location are examples, and various modifications can be made without departing from the gist of the present invention.

The figure showing the structure of the antenna apparatus which concerns on Example 1 of this invention. FIG. 6 is a diagram illustrating a connection method of second and third conductor patterns of the antenna device according to the first embodiment. FIG. 6 is a diagram for explaining a model used for characteristic evaluation of the antenna device according to the first embodiment. FIG. 6 is a diagram illustrating a simulation example of VSWR characteristics of the antenna device according to the first embodiment. The figure showing the example of a simulation of the VSWR characteristic when the antenna apparatus which concerns on Example 1 does not have a discontinuous part of a conductor pattern. The figure which shows the connection width | variety of the 2nd, 3rd conductor pattern of the antenna apparatus which concerns on Example 1. FIG. FIG. 10 is a diagram illustrating a simulation example of VSWR characteristics performed using the connection width of the second and third conductor patterns of the antenna device according to the first embodiment as parameters. The figure showing the modification which connects the 2nd, 3rd conductor pattern of the antenna apparatus which concerns on Example 1 only in one place. FIG. 9 is a diagram illustrating a simulation result of the VSWR characteristics of the modified example illustrated in FIG. 8 of the antenna device according to the first embodiment. The figure showing the modification which the antenna apparatus which concerns on Example 1 did not have the discontinuous part of a conductor pattern, and left only one side (half). The figure showing the modification which connected the 2nd, 3rd conductor pattern in the vicinity of both ends with respect to the modification shown in FIG. 10 of the antenna apparatus which concerns on Example 1. FIG. The figure showing the modification which further connected the 2nd, 3rd conductor pattern in the vicinity of one end with respect to the modification shown in FIG. 10 of the antenna apparatus which concerns on Example 1. FIG. FIG. 13 is a diagram illustrating a simulation result of the VSWR characteristics of the modified example illustrated in FIGS. 10 to 12 of the antenna device according to the first embodiment. The figure showing the structure of the antenna apparatus which concerns on Example 2 of this invention. FIG. 6 is a diagram illustrating a connection method of second and third conductor patterns of the antenna device according to the second embodiment.

Explanation of symbols

1, 5 Antenna devices 2, 6 Substrate 3 Flexible substrate 7 Housing 7a, 7e Rib 7b Projection 7c Substrate insertion hole 7d Via hole 11, 51 First conductor pattern 12, 12b, 52 Second conductor pattern 13, 13a, 13b, 13c, 13d, 53 Third conductor pattern 21, 61 Radio circuit 22, 62 Feed line 23, 63 Feed point 24 Feed pin 25 Leaf spring 31, 32, 71, 72 Connection point 64 Spring

Claims (6)

A first conductor pattern formed flat on a substrate;
It is formed in a planar shape in a range including one end side of the substrate, one side other than the side of the end side opposes substantially one side of the first conductor pattern, and the first side A second conductor pattern that can be fed in the vicinity of the side opposite to the one side of the conductor pattern;
A third conductor pattern formed along a surface formed by a flexible substrate disposed so as to substantially intersect the substrate and the edge, and connected to the second conductor pattern in the vicinity of the edge. An antenna device comprising: In an antenna device used in a wireless device having a housing and a substrate built in the housing,
A first conductor pattern formed in a planar shape on the substrate;
It is formed in a planar shape in a range including one end side of the substrate, one side other than the side of the end side opposes substantially one side of the first conductor pattern, and the first side A second conductor pattern that can be fed in the vicinity of the side opposite to the one side of the conductor pattern;
A third conductor pattern formed along one surface of the casing disposed so as to substantially intersect the substrate and the end side, and connected to the second conductor pattern in the vicinity of the end side An antenna device comprising:   The said 2nd conductor pattern is electrically connected with the said 3rd conductor pattern in two places near the both ends of one edge | side of the said edge side side, The Claim 1 or Claim 2 characterized by the above-mentioned. The antenna device described.   The distance between the opposing sides of the first conductor pattern and the second conductor pattern is approximately 10 minutes of the length of the side of the second conductor pattern facing one side of the first conductor pattern. The antenna device according to claim 1, wherein the antenna device is 1 or less.   3. The antenna device according to claim 1, wherein the second conductor pattern can be fed unbalanced with the first conductor pattern as a ground side. 4.   3. The antenna device according to claim 1, wherein the second conductor pattern can be balanced and fed in a pair with the first conductor pattern. 4.

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