JP4775233B2 - ANTENNA DEVICE AND ANTENNA MOUNTING BOARD USING THE SAME - Google Patents

Description

  The present invention relates to an antenna device, and more particularly to an electrode pattern shape of a surface mount antenna device and a method of mounting the antenna device on a printed circuit board. The present invention also relates to an antenna mounting board, and more particularly to an antenna mounting board on which a surface mounting type antenna device is mounted.

  A small antenna device built in a small wireless communication device such as a cellular phone has attracted attention. As a conventional antenna device, for example, the one shown in FIG. 2B of Patent Document 1 is well known.

  FIG. 12 is a schematic perspective view showing an example of the configuration of a conventional antenna device.

  As shown in FIG. 12, the antenna device 60 includes a first conductor pattern 62 formed on the bottom surface 61A of the dielectric block 61 and a second conductor pattern 63 formed on the entire top surface 61B of the dielectric block. And a side conductor 64 formed on the side surface 61C of the dielectric block. The first conductor pattern 62 is substantially U-shaped, and includes a first straight conductor portion 62a provided along the first side 61a of the bottom surface 61A, and a second side facing the first side 61a. A second straight conductor portion 62b provided along 61b, and a third side 61c orthogonal to the first and second sides 61a and 61b. The third linear conductor portion 62c is connected to the straight conductor portion 62b.

  The first conductor pattern 62 is connected to the second conductor pattern 63 via the side conductor 64. Thereby, the 1st conductor pattern 62, the 2nd conductor pattern 63, and the side conductor 64 comprise one radiation conductor. Of the first conductor pattern 62, one end portion 62x of the first linear conductor portion 62a serves as a feeding point, and among the second conductor pattern 63, the end portion on the side opposite to the end portion in contact with the side conductor 64 is provided. The end 63x constitutes an open end of the radiation conductor. Such an antenna device 60 is mounted in a predetermined mounting area on a printed circuit board of a small wireless communication device, and the feeding point 62 x is connected to the signal supply source 66 through the matching circuit 65.

  FIG. 13 is a schematic perspective view showing a state where the antenna device 60 of FIG. 12 is mounted on a printed board.

As shown in FIG. 13, an antenna mounting region 73 is provided on a printed circuit board 71 and surrounded by a ground pattern 72 in three directions. Soldered onto 74a, 74b. At this time, the direction of the antenna device 60 is such that the straight conductor portion 62c along the longitudinal direction of the dielectric block 61 among the three straight conductor portions constituting the first conductor pattern 62 is parallel to the ground pattern 72. It is set to be separated from the peripheral line 72a. As a result, the distance L ₀ between the straight conductor portion 62 c and the peripheral line 72 of the ground pattern can be made as wide as possible, and as a result, the first conductor pattern 62 can escape from the ground pattern 72 as much as possible. Therefore, it is possible to prevent deterioration of the antenna characteristics due to the influence of the ground pattern 72. Further, when the antenna device 60 is installed in such an orientation, since the feeding point 62x is connected to the left land 74a when viewed from the direction of the arrow P, a layout in which the feeding line 75 is connected to the left land 74a and Become.

Patent Document 1 proposes an antenna device in which a feeding electrode side portion of a radiation electrode formed on the bottom surface of a rectangular parallelepiped base and an open end side portion formed on the top surface of the base are arranged so as to face each other. ing. According to this antenna device, the distance between the feeding end side portion and the open end side portion of the radiation electrode can be widened, and the coupling between the feeding side portion and the open end side portion of the radiation electrode is suppressed. Therefore, it is possible to prevent a decrease in antenna gain (deterioration of antenna characteristics) due to the coupling strength between the feeding end side portion and the open end side portion of the radiation electrode while reducing the size of the base. .
JP 2003-124726 A

  By the way, this type of antenna device is required to have good characteristics no matter which position on the printed board is mounted. Here, in the conventional antenna device described above, the shapes of the conductor patterns on the upper and lower surfaces are different, and therefore the direction of the chip is rotated 180 degrees when the feeding position changes from one land 74a to the opposite land 74b. There is a need. However, in this case, the straight conductor portion 62c of the first conductor pattern 62 along the longitudinal direction of the dielectric block 61 approaches the peripheral line 72a of the ground pattern 72 parallel to the first conductor pattern 62, and the antenna structure with respect to the ground pattern is reduced. It will change. That is, there is a problem that the relative position with respect to the ground pattern 72 changes depending on the feeding direction, and the element value and the radiation pattern of the matching circuit 76 change significantly.

  Therefore, an object of the present invention is to provide an antenna device and a mounting method thereof in which the structure and characteristics are substantially the same even if the feeding position is changed by changing the direction of the chip.

  Another object of the present invention is to provide an antenna mounting substrate on which an antenna device having good characteristics is mounted regardless of the feeding position.

  The object of the present invention is to provide a dielectric block having first and second surfaces facing each other, a first conductor pattern formed on a part of the first surface of the dielectric block, and a first block of the dielectric block. 2, a second conductor pattern formed on at least a part of the surface of 2, and a connection conductor that connects the first conductor pattern and the second conductor pattern, and the first surface of the dielectric block is mounted on the mounting surface When the substrate is rotated 180 ° with a straight line parallel to the mounting surface or a straight line perpendicular to the mounting surface as the rotation axis, the shape and orientation of the conductor pattern in contact with the mounting surface before and after the rotation are substantially This is achieved by an antenna device characterized by being identical.

  In the present invention, the first conductor pattern includes a first conductor portion provided along the first side of the first surface of the dielectric block, and a second side facing the first side. A second conductor portion, and a third conductor portion connecting the first portion and the second portion, wherein the second conductor pattern is a first conductor of the first conductor pattern. A fourth conductor portion facing the portion, a fifth conductor portion facing the second conductor portion of the first conductor pattern, and a sixth conductor portion connecting the fourth conductor portion and the fifth conductor portion. It is preferable that the 2nd conductor part and the 5th conductor part are connected via the connection conductor including a conductor part.

  In the present invention, it is preferable that the straight line parallel to the mounting surface serving as the rotation axis of the dielectric block is parallel to the first and second sides. Moreover, it is preferable that the projection planes of the first conductor pattern and the second conductor pattern seen from the direction perpendicular to the first and second surfaces of the dielectric block coincide with each other.

  In the present invention, the third conductor portion is provided along a third side perpendicular to the first and second sides of the first surface, and the sixth conductor portion is a third conductor portion. It is preferable that they are provided at positions facing each other.

  In the present invention, the third conductor portion is formed in parallel with the third and fourth sides orthogonal to the first and second sides of the first surface, and the third conductor extends from the third side. It is preferable that the width to the portion and the width from the fourth side to the third conductor portion are substantially the same.

  In the present invention, the sixth conductor portion is provided on substantially the entire surface between the fourth conductor portion and the fifth conductor portion, whereby the second conductor pattern becomes the second conductor pattern of the dielectric block. It is preferable to cover substantially the entire surface.

  In the present invention, the connecting conductor is preferably a through-hole conductor.

  The above-mentioned object of the present invention is also a method for mounting the above-described antenna device on a printed circuit board having an antenna mounting area along the first peripheral line of the ground pattern, the fourth facing the third side. The antenna device is arranged so that the side of the antenna device faces the first peripheral line of the ground pattern. In this case, the ground pattern has second and third peripheral lines substantially perpendicular to the first peripheral line, the first side faces the second peripheral line of the ground pattern, and the second side It is preferable to arrange the antenna device so as to face the third peripheral line of the ground pattern.

  The above object of the present invention is also provided with a printed circuit board having an antenna mounting area along the first peripheral line of the ground pattern, and the above-described antenna device mounted in the antenna mounting area, and facing the third side. This is also achieved by an antenna mounting board in which the antenna device is arranged so that the fourth side faces the first peripheral line of the ground pattern. In this case, the ground pattern has second and third peripheral lines substantially perpendicular to the first peripheral line, the first side faces the second peripheral line of the ground pattern, and the second side Preferably, the antenna device is arranged so as to face the third peripheral line of the ground pattern.

  Thus, according to the present invention, even if the feeding position is changed by changing the direction of the chip, it is possible to provide an antenna device and a mounting method thereof that have substantially the same structure and characteristics.

  Moreover, according to the present invention, it is possible to provide an antenna mounting substrate on which an antenna device having good characteristics is mounted regardless of the feeding position.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic perspective view showing the structure of the antenna device according to the first embodiment of the present invention. FIG. 2 is a development view of the antenna device shown in FIG.

  As shown in FIGS. 1 and 2, the antenna device 10 includes a rectangular parallelepiped dielectric block 11 and a first conductor pattern formed on one main surface (first surface) 11 </ b> A of the dielectric block 11. 12, a second conductor pattern 13 formed on the main surface (second surface) 11 </ b> B opposite to the dielectric block 11, and a first conductor pattern 12 provided on the side surface 11 </ b> C of the dielectric block 11. A side conductor (connection conductor) 14 that connects the second conductor pattern 13 is provided.

  The first and second conductor patterns 12 and 13 are both formed as a U-shaped pattern. Specifically, the first conductor pattern 12 is opposed to the first straight conductor portion 12a provided along the first side 11a of the first surface 11A of the dielectric block 11 and the first side 11a. The second straight conductor portion 12b provided along the second side 11b and the third straight line conductor 11b provided along the third side 11c orthogonal to the first and second sides 11a, 11b. It has the 3rd linear conductor part 12c which connects the part 11a and the 2nd linear conductor part 12b. The second conductor pattern 13 includes a fourth straight conductor portion 13a facing the first straight conductor portion 12a of the first conductor pattern 12, and a fifth straight line facing the second straight conductor portion 12b. It has a conductor portion 13b and a sixth straight conductor portion 13c facing the third straight conductor portion 12c.

  The shape and direction of the second conductor pattern 13 are the same as those of the first conductor pattern 12. In other words, the projection planes of the first conductor pattern 12 and the second conductor pattern 13 viewed from the direction perpendicular to the first and second surfaces 11A and 11B of the dielectric block 11 coincide with each other. Therefore, when the first surface 11A of the dielectric block 11 is placed with the first surface 11A facing the mounting surface and rotated by 180 ° using a straight line (X axis) parallel to the mounting surface as a rotation axis, the first surface 11A contacts the mounting surface after rotation. The shape and orientation of the second conductor pattern 13 are the same as those of the first conductor pattern 12.

  As shown in FIG. 1, the X axis is an axis parallel to the mounting surface and parallel to the first and second sides 11a and 11b. The Y axis is an axis parallel to the mounting surface and parallel to the third side 11c. Further, the Z axis is an axis perpendicular to the mounting surface.

  The second straight conductor portion 12b and the fifth straight conductor portion 13b are electrically connected via a side conductor 14 provided on the side surface 11C of the dielectric block 11. Thereby, the 1st conductor pattern 12, the side conductor 14, and the 2nd conductor pattern 13 comprise one continuous radiation | emission conductor. Thus, since the radiation conductor is formed over the plurality of surfaces of the dielectric block 11, a desired electrical length can be secured even if the dielectric block 11 itself is downsized. Such an antenna device is generally called a folded monopole antenna.

  As shown in FIG. 1, when the first surface 11A of the dielectric block 11 faces downward, the end 12x of the first straight conductor portion 12a serves as a feeding point, and the end of the fourth straight conductor portion 13a. 13x is the open end of the radiation conductor. In the antenna device 10 of the present embodiment, since the first and second conductor patterns 12 and 13 have the same shape and orientation, the antenna device 10 can be turned over, that is, the second surface 11B can face downward. Although details will be described later, in this case, the end portion 13x of the fourth straight conductor portion 13a serves as a feeding point, and the end portion 12x of the first straight conductor portion 12a serves as an open end of the radiation conductor. Further, the feeding position of the antenna device 10 viewed from the direction of the arrow P is changed from the left side to the right side.

  FIG. 3 is a schematic plan view showing an example of a pattern layout on the printed circuit board 21 on which the antenna device 10 is mounted.

As shown in FIG. 3, an antenna mounting region 23 is provided on the printed circuit board 21 so as to be surrounded by a ground pattern 22 in three directions. The antenna mounting region 23 is surrounded by a first peripheral line 22d of the ground pattern 22 and second and third peripheral lines 22a and 22b that are substantially orthogonal to the first peripheral line 22d. A clearance having a predetermined width W ₁ is provided between the antenna mounting region 23 and the ground pattern 22. This clearance is preferably as narrow as possible as long as desired antenna characteristics can be obtained. Two lands 24a and 24b are formed in the antenna mounting region 22, and the antenna device 10 is soldered onto the lands 24a and 24b. Here, a power supply line 25 is connected to the land 24a on the left side when viewed from the direction of the arrow P (on the first peripheral line 22d side of the ground pattern 22), and the series inductor 26a is connected between the land 24a and the power supply line 25. And a matching circuit 26 including a parallel inductor 26b is inserted. On the other hand, the land 24b on the right side is an independent pattern only for fixing the antenna device 10.

  FIG. 4 is a schematic perspective view showing a state where the antenna device 10 is mounted on the printed circuit board 21 of FIG.

  As shown in FIG. 4, the pattern layout in which the power supply line 25 is connected to the left land 24a is mounted with the first surface 11A of the dielectric block 11 facing downward. Specifically, the fourth side 11 d of the first surface of the dielectric block 11 faces the first peripheral line 22 d of the ground pattern 22, and the first side 11 a contacts the second peripheral line 22 a of the ground pattern 22. The antenna device 10 is arranged so that the second side 11 b faces the third peripheral line 11 b of the ground pattern 22. The fourth side 11d is a side facing the third side 11c.

  By arranging the antenna device 10 in this way, the feeding point of the antenna device 10 can be connected to the left land 24a. In addition, since the third straight conductor portion 12c of the first conductor pattern 12 is separated from the first peripheral line 22d of the ground pattern 22, it is possible to suppress deterioration in antenna characteristics due to the influence of the ground pattern 22. Therefore, the clearance width between the ground pattern 22 and the antenna mounting area 23 can be narrowed, thereby reducing a useless area on the printed circuit board 21 and realizing higher density mounting.

  FIG. 5 is a schematic plan view showing another example of the pattern layout on the printed circuit board 21 on which the antenna device 10 is mounted.

  As shown in FIG. 5, this layout has a symmetrical relationship with the layout of FIG. 3, and the left land 24a is an independent pattern only for fixing the antenna device 10, but the right land 24b is matched. 3 is different from the layout of FIG. 3 in that it is connected to the power supply line 25 via the circuit 26.

  FIG. 6 is a schematic perspective view showing a state where the antenna device 10 is mounted on the printed board 21 of FIG.

  As shown in FIG. 6, the pattern layout in which the power supply line 25 is connected to the right land 24 b is mounted with the second surface 11 </ b> B of the dielectric block 11 facing downward. By arranging the antenna device 10 in this way, the feeding point of the antenna device 10 can be connected to the right land 24b. Similarly to the case of FIG. 4, the sixth linear conductor portion 13 c of the second conductor pattern 13 is separated from the first peripheral line 22 d of the ground pattern 22, so that the antenna characteristics are deteriorated due to the influence of the ground pattern 22. Can be suppressed. Therefore, the clearance width between the ground pattern 22 and the antenna mounting area 23 can be narrowed, thereby reducing a useless area on the printed circuit board 21 and realizing higher density mounting.

  As described above, according to the antenna device 10 of the present embodiment, the first and second conductor patterns 12 and 13 are both U-shaped, and the dielectric block is rotated 180 ° about the X axis as the rotation axis. Even if the first and second conductor patterns 12 and 13 are formed so that the shape and direction of the conductor pattern in contact with the mounting surface are substantially the same before and after the rotation, the desired antenna is formed. While maintaining the characteristics, both power feeding from the left land 24a and power feeding from the right land 24b can be handled. In particular, regardless of which of the first surface 11A and the second surface 11B of the dielectric block 11 is directed downward, the linear conductor portion 12c or 13c along the longitudinal direction of the dielectric block 11 is parallel to the ground pattern. Since the conductor pattern that is separated from the first peripheral line 22d of the 22 and is in contact with the mounting surface escapes from the ground pattern 22 as much as possible, it is desirable whether power is supplied from either the left or right land 24a, 24b. Antenna characteristics can be obtained.

  FIG. 7 is a schematic perspective view showing the configuration of the antenna device according to the second embodiment of the present invention. FIG. 8 is a development view of the antenna device shown in FIG.

  As shown in FIGS. 7 and 8, the antenna device 30 is characterized in that the first and second conductor patterns 12 and 13 are both substantially I-shaped.

  Specifically, the first conductor pattern 12 is opposed to the first straight conductor portion 12a provided along the first side 11a of the first surface 11A of the dielectric block 11 and the first side 11a. A second straight conductor portion 12b provided along the second side 11b, and a third straight conductor portion 12c connecting the first straight conductor portion 11a and the second straight conductor portion 12b. is doing. The third straight conductor portion 12c is formed in parallel with the third and fourth sides 11c and 11d orthogonal to the first and second sides 11a and 11b, and extends from the third side 11c to the third straight line. The width to the conductor portion 12c and the width from the fourth side 11d to the third straight conductor portion 12c are substantially the same. The second conductor pattern 13 includes a fourth straight conductor portion 13a facing the first straight conductor portion 12a of the first conductor pattern 12, and a fifth straight line facing the second straight conductor portion 12b. It has a conductor portion 13b and a sixth straight conductor portion 13c facing the third straight conductor portion 12c.

  Similarly to the first embodiment, the second linear conductor portion 12b and the fifth linear conductor portion 13b are electrically connected via the side conductor 14 provided on the side surface 11C of the dielectric block 11. Yes. Thereby, the 1st conductor pattern 12, the side conductor 14, and the 2nd conductor pattern 13 comprise one continuous radiation | emission conductor.

  Thus, since the shape and direction of the second conductor pattern 13 are the same as those of the first conductor pattern 12, the X-axis is used as the rotation axis from the state where the lower surface of the dielectric block 11 is placed on the mounting surface. When rotated by 180 °, the shape and direction of the conductor pattern in contact with the mounting surface before and after the rotation are substantially the same. Further, since the I-shaped pattern is left-right symmetric when the Y axis is the symmetry axis, the I-shaped pattern is perpendicular to the mounting surface from the state where the first surface 11A of the dielectric block 11 is placed toward the mounting surface. When a straight line (Z-axis) is rotated 180 ° about the rotation axis, the shape and direction of the conductor pattern in contact with the mounting surface are substantially the same before and after the rotation. As for the power feeding position, power is fed from the left land when the first surface is directed to the mounting surface. However, when the dielectric block 11 is rotated 180 ° about the X axis as the rotation axis, the power feeding position is from the right land. Power supply.

  As described above, according to the antenna device 30 of the present embodiment, the first and second conductor patterns 12 and 13 are both substantially I-shaped, and the dielectric block is rotated 180 ° about the X axis as the rotation axis. Even if the dielectric block is rotated by 180 ° about the Z axis as the rotation axis, the first and second conductor patterns contacting the mounting surface are substantially the same before and after the rotation. Since the second conductor patterns 12 and 13 are formed, both power feeding from the left land 24a and power feeding from the right land 24b can be handled while maintaining desired antenna characteristics. In particular, the straight conductor portion 12c or 13c is separated from the first peripheral line 22d of the ground pattern 22 regardless of which of the first surface 11A and the second surface 11B of the dielectric block 11 faces downward, Although not as much as in the first embodiment, the conductor pattern in contact with the mounting surface has a layout that escapes from the ground pattern 22 as much as possible. Therefore, the desired antenna characteristics can be obtained even when power is supplied from either the left or right land 24a, 34b. Obtainable.

  Furthermore, according to the present embodiment, even if the dielectric block is rotated 180 ° about the Z axis as the rotation axis, the shape and direction of the conductor pattern in contact with the mounting surface before and after the rotation are substantially the same. The orientation of the antenna device using an automatic mounting machine (mounter) can be changed. In general, a mounter used when mounting an antenna device is difficult to turn the mounted component upside down due to its mechanism, but it is easy to rotate the mounted component about the Z axis as a rotation axis. Therefore, when the antenna device 30 of this embodiment is used, the orientation of the antenna device 30 can be automatically changed in the automatic mounting process using the mounter.

  FIG. 9 is a schematic perspective view showing the configuration of the antenna device according to the third embodiment of the present invention. FIG. 10 is a development view of the antenna device shown in FIG.

  As shown in FIGS. 9 and 10, the antenna device 40 is characterized in that the first conductor pattern 12 is substantially I-shaped and the second conductor pattern 13 is a solid pattern.

  Specifically, the first conductor pattern 12 is opposed to the first straight conductor portion 12a provided along the first side 11a of the first surface 11A of the dielectric block 11 and the first side 11a. A second straight conductor portion 12b provided along the second side 11b, and a third straight conductor portion 12c connecting the first straight conductor portion 11a and the second straight conductor portion 12b. is doing. The third straight conductor portion 12c is formed in parallel with the third and fourth sides 11c and 11d orthogonal to the first and second sides 11a and 11b, and extends from the third side 11c to the third straight line. The width to the conductor portion 12c and the width from the fourth side 11d to the third straight conductor portion 12c are substantially the same. The second conductor pattern 13 includes a fourth straight conductor portion 13a facing the first straight conductor portion 12a of the first conductor pattern 12, and a fifth straight line facing the second straight conductor portion 12b. It has a conductor portion 13b and a sixth straight conductor portion 13c that covers almost the entire surface between the fourth straight conductor portion and the fifth straight conductor portion. That is, the second conductor pattern 13 covers substantially the entire second surface 11B of the dielectric block 11.

  Similarly to the first and second embodiments, the second linear conductor portion 12b and the fifth linear conductor portion 13b are electrically connected via the side conductors 14 provided on the side surface 11C of the dielectric block 11. It is connected. Thereby, the 1st conductor pattern 12, the side conductor 14, and the 2nd conductor pattern 13 comprise one continuous radiation | emission conductor.

  In the present embodiment, unlike the first and second embodiments, the shape of the second conductor pattern 13 is not the same as that of the first conductor pattern 12. However, since the first conductor pattern 12 is I-shaped and is symmetric when the X axis is a symmetric axis, the first surface 11A of the dielectric block 11 is placed facing the mounting surface. When the Z axis is rotated 180 degrees around the rotation axis, the feeding position with respect to the mounting surface is different before and after the rotation, but the shape and orientation of the conductor pattern in contact with the mounting surface are substantially the same. With respect to the power supply position, power is supplied from the left land when the first surface is directed to the mounting surface, but power is supplied from the right land when the dielectric block 11 is rotated 180 °.

  As described above, according to the antenna device 40 of the present embodiment, the first conductor pattern 12 is substantially I-shaped, and the dielectric block is 180 with the Z axis as the rotation axis, as in the second embodiment. Even when rotated, the first conductor pattern 12 is formed so that the shape and direction of the conductor pattern in contact with the mounting surface are substantially the same before and after the rotation. For this reason, it is possible to handle both power feeding from the left land 24a and power feeding from the right land 24b while maintaining desired antenna characteristics.

  Furthermore, according to the present embodiment, as in the second embodiment, even if the dielectric block is rotated 180 ° about the Z axis as the rotation axis, the shape and orientation of the conductor pattern in contact with the mounting surface before and after the rotation are the same. Since they are substantially the same, the orientation of the antenna device using the mounter can be changed.

  FIG. 11 is a schematic perspective view showing the configuration of the antenna device according to the fourth embodiment of the present invention.

  As shown in FIG. 11, the antenna device 50 is characterized in that the first conductor pattern 12 and the second conductor pattern 13 are connected by a plurality of through-hole conductors 51. That is, in the first embodiment, the through-hole conductor 51 is used instead of the side conductor 14. Since other configurations are the same as those of the antenna device 10 according to the first embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  The through-hole conductor 51 penetrates from the first surface 11A to the second surface 11B, and thereby electrical conduction between the conductor patterns 12 and 13 is achieved. As a result, one radiating conductor composed of the first conductor pattern 12, the through-hole conductor 51, and the second conductor pattern 13 is formed. As described above, according to the present embodiment, since no conductor surface is formed on the side surface of the dielectric block 11, in addition to the effect of the invention according to the first embodiment, the spread of the solder fillet is suppressed, and the antenna device 10 is mounted. The area can be reduced. The connection of the conductor patterns 12 and 13 using the through-hole conductor 51 can be applied not only in the first embodiment but also in the second and third embodiments. In addition, by applying a through hole, an edge effect (a phenomenon in which a current flows through the end of a conductor) can be suppressed, and antenna characteristics can be further improved.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention, and these are also included in the scope of the present invention. Needless to say.

  For example, in the above embodiment, when the dielectric block 11 is rotated 180 ° about the X axis parallel to the mounting surface or the Z axis perpendicular to the mounting surface as the rotation axis, the conductor in contact with the mounting surface before and after the rotation Although the shape and direction of the pattern are the same, it is not necessary to be completely the same.

  In the above embodiment, the case where the three surrounding directions of the antenna mounting area are surrounded by the ground pattern is taken as an example. However, the two surrounding directions may be surrounded, and the ground pattern is only in one direction. It does not matter if it exists.

  Further, it is not essential that the linear conductor portions 12c and 13c are provided in the longitudinal direction of the dielectric block 11, and the linear conductor portions 12a, 12b, 13a, and 13b are provided in the longitudinal direction of the dielectric block 11. It doesn't matter. Furthermore, it is not essential that the surfaces 11A and 11B of the dielectric block are rectangular, and they may be square.

  Moreover, it is not essential that the conductor portions constituting the conductor patterns 12 and 13 are linear, and may have a bent portion or a curved portion.

FIG. 1 is a schematic perspective view showing the structure of the antenna device according to the first embodiment of the present invention. FIG. 2 is a development view of the antenna device shown in FIG. FIG. 3 is a schematic plan view showing an example of a pattern layout on the printed circuit board 21 on which the antenna device 10 is mounted. FIG. 4 is a schematic perspective view showing a state where the antenna device 10 is mounted on the printed circuit board 21 of FIG. FIG. 5 is a schematic plan view showing another example of the pattern layout on the printed circuit board 21 on which the antenna device 10 is mounted. FIG. 6 is a schematic perspective view showing a state where the antenna device 10 is mounted on the printed board 21 of FIG. FIG. 7 is a schematic perspective view showing the configuration of the antenna device according to the second embodiment of the present invention. FIG. 8 is a development view of the antenna device shown in FIG. FIG. 9 is a schematic perspective view showing the configuration of the antenna device according to the third embodiment of the present invention. 10 is a development view of the antenna device shown in FIG. FIG. 11 is a schematic perspective view showing the configuration of the antenna device according to the fourth embodiment of the present invention. FIG. 12 is a schematic perspective view showing an example of the configuration of a conventional antenna device. FIG. 13 is a schematic perspective view showing a state where the antenna device 60 is mounted on a printed board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Antenna apparatus 11 Dielectric block 11A First surface 11B of dielectric block Second surface 11C of dielectric block Side surface 11a of dielectric block Linear conductor portion 11a First side 11b of first surface of dielectric block Second side 11c of the first surface of the dielectric block Third side 11d of the first surface of the dielectric block Fourth side 12 of the first surface of the dielectric block 12 First conductor pattern 12a First First linear conductor portion 12b of the first conductor pattern Second linear conductor portion 12c of the first conductor pattern Third linear conductor portion 12x of the first conductor pattern End portion 13 of the first conductor pattern Second conductor Pattern 13a Fourth straight conductor portion 13b of second conductor pattern Fifth straight conductor portion 13c of second conductor pattern Sixth straight conductor portion 13x of second conductor pattern End 14 of second conductor pattern Side conductor 21 Printed circuit board 22 Antenna mounting region 22 Ground pattern 22a Second peripheral line 22b of ground pattern Third peripheral line 22d of ground pattern First peripheral line 23 of ground pattern Antenna Mounting area 24a Land (left side)
24b Land (right side)
25 Feed line 26 Matching circuit 26a Series inductor 26b Parallel inductor 30 Antenna device 40 Antenna device 50 Antenna device 51 Through-hole conductor 60 Antenna device 61 Dielectric block 61A Dielectric block bottom surface 61B Dielectric block top surface 62 First conductor pattern 62c Straight conductor portion 62x of first conductor pattern Feeding end side portion 63 Second conductor pattern (entire conductor pattern)
63x Open end side portion 64 Side conductor 65 Matching circuit 66 Signal supply source 71 Printed circuit board 72 Ground pattern 72a Perimeter line 73 of ground pattern Antenna mounting area 74a Land (left side)
74b Land (right side)

Claims (7)

A dielectric block having opposing first and second surfaces;
A first conductor pattern formed on a part of the first surface of the dielectric block; a second conductor pattern formed on at least a part of the second surface of the dielectric block; A connection conductor connecting the first conductor pattern and the second conductor pattern;
The first conductor pattern includes a first conductor portion provided along a first side of the first surface of the dielectric block, and a second side facing the first side. A second conductor portion provided by the second conductor portion, and a third conductor portion connecting the first portion and the second portion,
The second conductor pattern includes a fourth conductor portion facing the first conductor portion of the first conductor pattern, and a fifth conductor portion facing the second conductor portion of the first conductor pattern. A conductor portion; and a sixth conductor portion connecting the fourth conductor portion and the fifth conductor portion;
The second conductor portion and the fifth conductor portion are connected via the connection conductor;
When the first surface of the dielectric block is placed with the first surface facing the mounting surface and rotated by 180 ° using a straight line parallel to the mounting surface or a straight line perpendicular to the mounting surface as a rotation axis, The shape and direction of the conductor pattern in contact with the mounting surface before and after the antenna device are substantially the same. The antenna device according to claim 1, wherein a straight line parallel to the mounting surface serving as a rotation axis of the dielectric block is parallel to the first and second sides.   2. The projected surfaces of the first conductor pattern and the second conductor pattern as viewed from a direction perpendicular to the first and second surfaces of the dielectric block are coincident with each other. The antenna device according to 1. The third conductor portion is provided along a third side orthogonal to the first and second sides of the first surface, and the sixth conductor portion is the third conductor portion. The antenna device according to claim 1 , wherein the antenna device is provided at a position opposite to the antenna device. The third conductor portion is formed in parallel with the third and fourth sides orthogonal to the first and second sides of the first surface, and the third side from the third side to the third side 4. The antenna device according to claim 1 , wherein the width to the conductor portion and the width from the fourth side to the third conductor portion are substantially the same. 5. . The sixth conductor portion is provided on substantially the entire surface between the fourth conductor portion and the fifth conductor portion, whereby the second conductor pattern is formed on the second portion of the dielectric block. The antenna device according to claim 5 , wherein substantially the entire surface of the antenna device is covered. The antenna device according to claim 1, wherein the connection conductor is a through-hole conductor.

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