JP2008252517A - Antenna device and radio communication equipment using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna device capable of obtaining longer antenna length. <P>SOLUTION: The antenna device 10 comprises an antenna block 100 and a printed circuit board 200 having an antenna mounting region. The antenna block 100 has a substrate 110 comprising a dielectric, and a first radiation conductor 120. The first radiation conductor 120 is composed of an upper surface conductor section 121 and first and second side conductor sections 122, 123. The first side conductor section 122 is connected to the upper surface conductor section 121 via a gap 124. Second and third radiation conductors 215, 218 are provided on the front and rear of the printed board 200, respectively. One end of the first radiation conductor 120 is connected to one end of the second radiation conductor 215, and one end of the third radiation conductor 218 is connected to the other end of the second radiation conductor 215 via a through hole conductor 217. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an antenna device, and more particularly to a conductor pattern shape of a surface mount type antenna device. The present invention also relates to a wireless communication device using this antenna device.

A small antenna device is built in a small wireless communication device such as a cellular phone. In general, this type of antenna device has a radiating conductor formed on the upper and side surfaces of a base made of a dielectric (see Patent Document 1). In addition, in order to obtain a desired antenna length using a smaller substrate, the antenna length is obtained using a radiation conductor formed on the bottom surface of the substrate (that is, the surface of the printed circuit board) as well as the upper surface and side surfaces of the substrate. An antenna device configured as described above is also known (see Patent Document 2).
Japanese Patent No. 3114582 Japanese Patent No. 3114605

  However, there is a limit to securing the antenna length only by forming the radiation conductor on the top and side surfaces of the substrate and the surface of the printed circuit board, and it is difficult to reduce the area occupied by the antenna while maintaining the required antenna length. there were.

  The present invention has been made to solve the above-described problems, and can obtain a longer antenna length, or can reduce the size of the base and the antenna area while maintaining the required antenna length. An object is to provide an antenna device.

  The above object of the present invention includes an antenna block and a printed circuit board having an antenna block mounting area on the surface, and the antenna block is electrically connected to a base made of a dielectric or a magnetic material over the top and side surfaces of the base. A first radiating conductor formed on the printed circuit board and having one end connected to one end of the first radiating conductor and a back surface of the printed board. And a third radiating conductor having one end connected to the other end of the first radiating conductor or the other end of the second radiating conductor.

  The object of the present invention is also achieved by a wireless communication device comprising the antenna device having the above characteristics.

  According to the present invention, since the radiating conductor is formed not only on the front surface but also on the back surface of the printed circuit board, a longer antenna length can be secured, thereby reducing the size of the base and the area occupied by the antenna. As a result, the size of the wireless communication device can be reduced.

  In the present invention, it is preferable that the second radiation conductor is provided in the mounting area of the antenna block. According to this, since the second radiation conductor is in contact with the base made of a dielectric or magnetic substance, the wavelength shortening effect by the base can be obtained, and the antenna characteristics can be improved.

  In the present invention, a first open area in which a ground pattern does not exist is provided in at least one direction around the antenna block mounting area, and the second radiation conductor is provided at the opening edge of the first open area. It is preferable that it is provided along. According to this, since the second radiation conductor is sufficiently separated from the edge line of the ground pattern and has a layout that escapes as much as possible from the ground pattern, good antenna characteristics can be obtained.

  In the present invention, the third radiation conductor is provided in a clearance region provided on the back surface of the printed circuit board, and a second open region in which no ground pattern exists is provided in at least one direction around the clearance region. The third radiating conductor is preferably provided along the opening edge of the second open area in the projection area of the antenna block mounting area. According to this, similarly to the second radiating conductor, the third radiating conductor is sufficiently separated from the edge line of the ground pattern and has a layout that escapes as much as possible from the ground pattern, so that good antenna characteristics can be obtained. Can do.

  In the present invention, the first radiation conductor includes an upper surface conductor portion formed on the upper surface of the substrate, a first side surface conductor portion formed on the first side surface of the substrate, and a second surface facing the first side surface. A second side conductor portion formed on the side surface of the first side conductor portion, wherein one end of the first side surface conductor portion is connected to one end of the upper surface conductor portion via a gap, and the other end of the first side surface conductor portion Is preferably connected to a power supply line on the printed circuit board. According to this, a gap feeding type antenna device can be provided.

  In the present invention, the first radiation conductor includes an upper surface conductor portion formed on the upper surface of the substrate, a first side surface conductor portion formed on the first side surface of the substrate, and a second surface facing the first side surface. A second side conductor part formed on the side surface of the first side conductor part, one end of the first side conductor part is directly connected to one end of the upper side conductor part, and the other end of the first side conductor part is printed It is preferable that the third radiation conductor is open at the other end, which is connected to a power supply line on the substrate. According to this, a monopole antenna can be provided.

  In the present invention, the first radiation conductor includes an upper surface conductor portion formed on the upper surface of the substrate, a first side surface conductor portion formed on the first side surface of the substrate, and a second surface facing the first side surface. A second side conductor portion formed on the side surface of the first side conductor portion, wherein one end of the first side surface conductor portion is connected to one end of the upper surface conductor portion via a gap, and the other end of the first side surface conductor portion Are preferably connected to a power supply line on the printed circuit board and to a ground pattern provided around the antenna block mounting area. According to this, since the inductive coupling type antenna device can be provided, the wavelength shortening effect can be further enhanced, and the antenna can be further miniaturized.

  As described above, according to the present invention, there is provided an antenna device that can obtain a longer antenna length or can reduce the size of the base and the area occupied by the antenna while maintaining the required antenna length. For the purpose.

  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 a configuration of an antenna device 10 according to a first embodiment of the present invention, and shows a part of a wireless communication device using the antenna device 10 according to the present embodiment. FIG. 2 is a schematic perspective view showing the configuration of the antenna block 100, and FIG. 3 is a development view of the antenna block 100.

  As shown in FIGS. 1 to 3, the antenna device 10 includes an antenna block 100 and a printed circuit board 200 having a mounting area (antenna mounting area) of the antenna block 100.

  The antenna block 100 includes a base 110 made of a dielectric and first radiation conductors 120 provided on the top and side surfaces of the base 110.

  The base 110 has a rectangular parallelepiped shape in which the A direction is the longitudinal direction and the B direction is the width direction, and the top surface 111 and the bottom surface 112 are parallel to both the A direction and the B direction, and are orthogonal to the A direction and the B direction. The first side surface 113 and the second side surface 114 are parallel to each other, and the third side surface 115 and the fourth side surface 116 are parallel to the A direction and orthogonal to the B direction. The size of the base 110 may be appropriately set according to the target antenna characteristics.

  Although it does not specifically limit as a material of the base | substrate 110, Ba-Nd-Ti type material (relative dielectric constant 80-120), Nd-Al-Ca-Ti type material (relative dielectric constant 43-46), Li—Al—Sr—Ti (relative permittivity 38 to 41), Ba—Ti based material (relative permittivity 34 to 36), Ba—Mg—W based material (relative permittivity 20 to 22), Mg—Ca— Ti-based materials (relative permittivity 19 to 21), sapphire (relative permittivity 9 to 10), alumina ceramics (relative permittivity 9 to 10), cordierite ceramics (relative permittivity 4 to 6), and the like can be used. . The base 110 is produced by firing these materials using a mold.

What is necessary is just to select a dielectric material suitably according to the target frequency. As the relative dielectric constant ε _r increases, a greater wavelength shortening effect can be obtained, so that the length of the radiation conductor can be shortened. However, this is not necessarily the case where the relative dielectric constant ε _r is large, and an appropriate value is obtained. Exists. Therefore, for example, when the target frequency is 2.33 GHz, it is preferable to use a material having a relative dielectric constant ε _r of about 20 to 25. According to this, the radiation conductor can be reduced in size while securing a sufficient gain. Preferred examples of the material having a relative dielectric constant ε _r of about 20 to 25 include Mg—Ca—Ti dielectric ceramics. As the Mg—Ca—Ti dielectric ceramic, it is particularly preferable to use a Mg—Ca—Ti dielectric ceramic containing TiO ₂ , MgO, CaO, MnO, and SiO ₂ .

  The first radiating conductor 120 on the base 110 has an upper conductor 121 provided on the upper surface 111 of the base 110 and one side (first side) 113 orthogonal to the longitudinal direction (A direction) of the base 110. The first side conductor portion 122 is provided, and the second side conductor portion 123 is provided on a part of the other side surface (second side surface) 114 facing the first side surface 113. . These conductor patterns can be formed by applying an electrode paste material by a method such as screen printing or transfer and then baking under a predetermined temperature condition. Silver, silver-palladium, silver-platinum, copper, or the like can be used as the electrode paste material. In the present embodiment, the conductor pattern is not formed on the bottom surface 112, the third side surface 115, and the fourth side surface 116 of the base 110, but may be formed if necessary.

  The upper surface conductor 121 is formed on the entire surface of the upper surface 111 of the base 110, and the second side surface conductor 123 is formed on the entire surface of the first side surface 113. Thereby, the upper surface conductor part 121 and the 2nd side surface conductor part 123 comprise one continuous strip | belt-shaped pattern.

  The first side conductor portion 122 is a strip-like conductor pattern that connects one end of the top conductor portion 121 and the first land pattern 213. The length of the first side conductor portion 122 is shorter than the height of the base 110, thereby forming a gap 124 having a predetermined width. The width of the first side conductor portion 122 is preferably set to be 1/2 or less than the width of the base 110. As described above, the first side surface conductor portion 122 is connected to the upper surface conductor portion 121 through the capacitive coupling by the gap 124, and constitutes one continuous conductor pattern. For this reason, the first side conductor portion 122 also contributes to the antenna characteristics and functions as a part of the radiation conductor.

  FIG. 4 is a schematic plan view showing an example of a pattern layout on the surface of the printed circuit board 200 on which the antenna block 100 is mounted.

  As shown in FIGS. 1 and 4, on the surface of the printed circuit board 200, a clearance area 210 that is an insulating area provided near the outer periphery of the board, an antenna mounting area 211 provided in the clearance area 210, and a clearance A ground pattern 220 provided outside the area 210, first and second land patterns 213 and 214 provided on both sides in the longitudinal direction of the antenna mounting area 211, and one end connected to the second land pattern 214, respectively. The second radiation conductor 215 formed and a power supply line 216 connected to the first land pattern 213 are provided. Various circuit components constituting the wireless communication device are mounted on the surface of the printed circuit board 200.

  In the present embodiment, the three directions around the clearance region 210 are surrounded by the ground pattern 220. That is, the antenna mounting area 211 is surrounded by the first and second edge lines 220a and 220b of the ground pattern orthogonal to the longitudinal direction and the third edge line 220c of the ground pattern parallel to the longitudinal direction. . The remaining one direction is the end of the printed circuit board 200, which is an area where no ground pattern exists (open area 250).

  The first land pattern 213 is a conductor pattern located below the first side conductor portion 122 of the antenna block 100, and a portion that is contained in the antenna mounting region 211 and a portion that is exposed outside the antenna mounting region 211. have. This exposed portion is used for soldering with the first side conductor portion 122 of the antenna block 100. In addition, the portion that falls within the antenna mounting region 211 is a portion that contributes to the connection with the feed line 216. Further, the second land pattern 214 is a conductor pattern located below the second side conductor portion 123 of the antenna block 100, and is located outside the antenna mounting area 211 and a portion that is within the antenna mounting area 211. It has an exposed part. This exposed portion is used for soldering with the second side conductor portion 123 of the antenna block 100.

  The second radiation conductor 215 is a strip-like conductor pattern extending in the longitudinal direction in the antenna mounting region 211, and one end thereof is connected to the second land pattern 214. The length of the second radiation conductor 215 is set to be approximately equal to the length of the base body 110. In addition, the width is preferably narrower than the width of the base 110 and set to ½ or less. A through-hole conductor 217 that penetrates the printed circuit board 200 is connected to the other end of the second radiation conductor 215. Since the second radiation conductor 215 is provided in the antenna mounting region 211 and is in contact with the base 110, the wavelength shortening effect by the base can be obtained. Further, since the second radiation conductor 215 is provided along the opening edge of the open region 250, the layout is sufficiently separated from the third edge line 220c of the ground pattern 220.

  FIG. 5 is a schematic plan view showing an example of the pattern layout on the back surface of the printed circuit board 200 on which the antenna block 100 is mounted, and particularly shows a state seen transparently from the front surface side.

  As shown in FIGS. 1 and 5, on the back surface of the printed circuit board 200, a clearance region 230 covering substantially the same range as the clearance region 210 on the front surface side, and a ground pattern 240 provided outside the clearance region 230, And a third radiating conductor 218 having one end connected to the through-hole conductor 217.

  Three directions around the clearance region 230 are surrounded by the ground pattern 240. That is, the projection area 212 of the antenna mounting area 211 includes the first and second edge lines 240a and 240b of the ground pattern orthogonal to the longitudinal direction and the third edge line 240c of the ground pattern 240 parallel to the longitudinal direction. Surrounded by The remaining one direction is an end of the printed circuit board 200, which is a region where there is no ground pattern (open region 260).

  The third radiating conductor 218 is a strip-like conductor pattern extending in the longitudinal direction of the antenna mounting region 211, similarly to the second radiating conductor 215, and one end of the third radiating conductor 218 via the through-hole conductor 217. Is connected to the other end. The other end 218 a of the third radiation conductor 218 is connected to the surrounding ground pattern 240. The length of the third radiation conductor 218 may be any length that can be connected to the surrounding ground pattern 240. The width is preferably equal to that of the second radiation conductor 215 in order to facilitate antenna design. Since the third radiation conductor 218 is provided along the opening edge of the open region 260, the third radiation conductor 218 has a layout sufficiently separated from the third edge line 240 c of the ground pattern 240.

  When the antenna device 10 is mounted in the antenna mounting region 211 on the printed circuit board 200, the first side surface conductor portion 122 of the antenna device 10 is connected to the first land pattern 213 on the printed circuit board 200, and the second side surface conductor portion. 123 is connected to the second land pattern 214 on the printed circuit board 200. That is, one end of the first radiation conductor 120 is connected to one end of the second radiation conductor 215, and one end of the third radiation conductor 218 is connected to the other end of the second radiation conductor 215 via the through-hole conductor 217. It has been configured.

  The signal current supplied from the power supply line 216 includes the first land pattern 213 on the printed circuit board 200, the first side conductor part 122, the top conductor part 121, the second side conductor part 123, and the second part of the antenna block 100. , The second radiation conductor 215 on the printed circuit board 200, the through-hole conductor 217, and the third radiation conductor 218 to the ground pattern 240 on the back surface side, but part of it radiates as radio waves. The At this time, the second and third radiation conductors 215 and 218 also contribute to the radiation of radio waves, and generate radio waves together with the first radiation conductor 120. The first and second land patterns 213 and 214 and the through-hole conductor 217 also contribute to the antenna characteristics and function as part of the radiation conductor. That is, these conductor patterns function as one electrically continuous radiation conductor. Therefore, the antenna length can be increased without increasing the area occupied by the antenna, as compared with the case where the first radiation conductor 120 alone is used or the combination of the first radiation conductor 120 and the second radiation conductor on the surface of the printed circuit board 200. The overall length of the antenna device can be reduced. Note that the antenna device 10 of the present embodiment is a so-called gap-fed inverted F antenna.

  As described above, according to the present embodiment, the radiation conductor is formed not only on the front surface but also on the back surface of the printed circuit board, so that a sufficient antenna length can be obtained without increasing the occupied area on the printed circuit board by the antenna device. Therefore, the antenna can be downsized.

  In addition, according to the present invention, the second radiating conductor 215 is provided along one side of the antenna mounting area 211 facing the first open area 250, and the second radiating conductor 215 is connected to the antenna mounting area 211. Since it is provided at the position farthest from the edge line 220c of the parallel ground pattern 220, the influence of the ground pattern on the antenna characteristics can be minimized, and the antenna characteristics can be improved. Similarly, since the third radiating conductor 218 is provided along one side of the projection region 212 of the antenna mounting region facing the second open region 260, the influence of the ground pattern on the antenna characteristics is minimized. Therefore, the antenna characteristics can be improved.

  FIG. 6 is a schematic perspective view showing the configuration of the antenna device 20 according to the second embodiment of the present invention. 7 is a schematic plan view showing an example of the pattern layout on the surface of the printed circuit board 200 in the antenna device 20, and FIG. 8 is a schematic diagram transparently showing the pattern layout on the back surface of the printed circuit board 200 as viewed from the front side. It is a top view.

  As shown in FIGS. 6 to 8, the antenna apparatus 20 horizontally inverts the antenna block 100 about the straight lines perpendicular to the top surface 111 and the bottom surface 112 of the antenna block 100 and correspondingly. The positions of the radiation conductor patterns and the through-hole conductors on the front and back surfaces of the printed circuit board 200 are different. That is, one end of the first radiation conductor 120 is connected to one end of the second radiation conductor 215, and one end of the third radiation conductor 218 is connected to the other end of the first radiation conductor 120 via the through-hole conductor 217. It has been configured.

  The signal current supplied from the feeder line 216 includes the second radiating conductor 215, the second land pattern 214, the second side conductor 123 of the antenna block 100, the upper conductor 121, and the first conductor. It flows to the ground pattern 240 on the back side through the side conductor 122, the first land pattern 213, the through-hole conductor 217, and the third radiation conductor 218 on the printed circuit board 200, but part of it is radiated as a radio wave. The At this time, the second and third radiation conductors 215 and 218 also contribute to the radiation of radio waves, and generate radio waves together with the first radiation conductor 120. That is, these conductor patterns function as one electrically continuous radiation conductor. Therefore, the antenna length can be increased without increasing the area occupied by the antenna, as compared with the case where the first radiation conductor 120 alone is used or the combination of the first radiation conductor 120 and the second radiation conductor on the surface of the printed circuit board 200. Thus, the antenna device can be downsized.

  As described above, according to the present embodiment, the radiation conductor is formed not only on the front surface but also on the back surface of the printed circuit board, so that a sufficient antenna length can be obtained without increasing the occupied area on the printed circuit board by the antenna device. Therefore, the antenna can be downsized.

  Further, according to the present embodiment, the third radiating conductor 218 is provided at the position farthest from the edge line of the ground pattern parallel to the third radiating conductor 218 in the projection surface 212 of the antenna mounting region 211. The influence of the pattern on the antenna characteristics can be minimized, and the antenna characteristics can be improved.

  FIG. 9 is a schematic perspective view showing the configuration of the antenna device 30 according to the third embodiment of the present invention.

  As shown in FIG. 9, the antenna device 30 is characterized in that one end of the first side conductor 122 is directly connected to one end of the upper conductor, and no gap is provided. Another feature is that the other end 218a of the third radiation conductor 218 is not connected to the surrounding ground pattern 240 and is open. Since other configurations are the same as those of the antenna device 10 according to the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  As described above, according to the present embodiment, it is possible to obtain the same effects as the antenna device 10 according to the first embodiment, and in particular, it is possible to cause the antenna device 30 to function as a monopole antenna.

  FIG. 10 is a schematic perspective view showing the configuration of the antenna device 40 according to the fourth embodiment of the present invention.

  As shown in FIG. 10, in the antenna device 40, the other end of the first side conductor portion 122 is connected to the power supply line 216 via the first land pattern 213 on the printed circuit board 200, and It is characterized in that it is connected to the ground pattern 220 via the land pattern 260. Therefore, the first side conductor portion 122 is formed wide across the entire width direction of the base 110, and the third land pattern 260 that connects the first side conductor portion 122 and the ground pattern 220 is the first land pattern 260. It is provided at a position opposite to the land pattern 213. Since other configurations are the same as those of the antenna device 10 according to the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  Thus, according to the present embodiment, since the first land pattern 213 and the third land pattern 260 are inductively coupled, in addition to the same effects as the antenna device 10 according to the first embodiment. Thus, the wavelength shortening effect can be further enhanced, and the antenna can be further miniaturized.

  Although the present invention has been described based on the preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Needless to say, these are also included in the scope of the present invention.

  For example, in the antenna device in each of the embodiments described above, the base 110 has a rectangular parallelepiped shape, but it is not essential that the base 110 is a strict rectangular parallelepiped. For example, a taper for specifying the direction of the corner of the rectangular parallelepiped is provided. It may be provided.

  Further, in the above embodiment, the case where the three directions around the antenna mounting area 211 are surrounded by the ground pattern 220 has been described. However, the present invention is not limited to such a case. For example, the antenna mounting area The two directions of the antenna mounting region 211 may be surrounded by the ground pattern 220 by providing 211 at the corners of the printed circuit board 200. In this case, the other two directions are the end portions of the printed circuit board 200 and are regions where no ground pattern exists. Even if the ground pattern has such a shape, if the second and third radiation conductors 215 and 218 are provided on the open region side, they can be formed at a position farthest from the edge line of the ground pattern. The antenna characteristics can be improved.

In the above embodiment, a dielectric is used as the material of the base 110. However, a magnetic material having dielectricity may be used in addition to the dielectric. In this case, since a wavelength shortening effect of 1 / {(ε × μ) ^1/2 } is obtained, a large wavelength shortening effect can be obtained by using a magnetic material having a high magnetic permeability μ. Moreover, since μ / ε determines the impedance of the electrode, the impedance can be increased by using a magnetic material having a high μ. As a result, the Q of the antenna that is too high can be lowered to obtain wideband characteristics.

  In the above embodiment, the gap 124 is formed on the first side surface 114 of the base 110. However, the gap 124 may be formed on the upper surface 111 of the base 110. In this case, the length of the first side conductor portion 122 is set to be the same as the height of the base body 110, and the upper surface conductor portion 121 is formed not shorter than the entire upper surface of the base body 110 but shorter than the length of the base body 110. Thereby, the gap 125 can be formed on the upper surface of the substrate 110.

FIG. 1 is a schematic perspective view showing a configuration of an antenna device 10 according to a first embodiment of the present invention. FIG. 2 is a schematic perspective view showing the configuration of the antenna block 100. FIG. 3 is a development view of the antenna block 100. FIG. 4 is a schematic plan view showing an example of a pattern layout on the surface of the printed circuit board 200 on which the antenna block 100 is mounted. FIG. 5 is a schematic plan view showing an example of the pattern layout on the back surface of the printed circuit board 200 on which the antenna block 100 is mounted, and particularly shows a state seen transparently from the front surface side. FIG. 6 is a schematic perspective view showing the configuration of the antenna device 20 according to the second embodiment of the present invention. FIG. 7 is a schematic plan view illustrating an example of a pattern layout on the surface of the printed circuit board 200 in the antenna device 20. FIG. 8 is a schematic plan view transparently showing the pattern layout of the back surface of the printed circuit board 200 as viewed from the front side. FIG. 9 is a schematic perspective view showing the configuration of the antenna device 30 according to the third embodiment of the present invention. FIG. 10 is a schematic perspective view showing the configuration of the antenna device 40 according to the fourth embodiment of the present invention.

Explanation of symbols

10 antenna device 20 antenna device 100 antenna block 110 base 111 upper surface 112 base bottom 113 base first side 114 base second side 115 base third side 116 base fourth side 120 first Radiation conductor 121 Upper surface conductor portion 122 First side surface conductor portion 123 Second side surface conductor portion 124 Gap 200 Printed circuit board 210 Clearance region (surface side)
211 Antenna mounting area (front side)
212 Projection area 213 of antenna mounting area First land pattern 214 Second land pattern 215 Second radiation conductor 216 Feed line 217 Through-hole conductor 218 Third radiation conductor 218a The other end 220 of the third radiation conductor Ground pattern 230 Clearance area on the back side (back side)
240 Ground pattern on the back side (back side)
250 (first) open area 260 (second) open area 270 third land pattern

Claims (8)

An antenna block, and a printed circuit board having a mounting area of the antenna block on the surface;
The antenna block is
A substrate made of a dielectric or magnetic material;
A first radiation conductor formed so as to be electrically connected to an upper surface and a side surface of the base body,
A second radiation conductor provided on the surface of the printed circuit board and having one end connected to one end of the first radiation conductor;
An antenna device comprising: a third radiation conductor provided on a back surface of the printed circuit board, and having one end connected to the other end of the first radiation conductor or the other end of the second radiation conductor.   The antenna device according to claim 1, wherein the second radiation conductor is provided in a mounting area of the antenna block. A first open area in which a ground pattern does not exist is provided in at least one direction around the antenna block mounting area;
The antenna device according to claim 2, wherein the second radiation conductor is provided along an opening edge of the first open region. The third radiation conductor is provided in a clearance region provided on the back surface of the printed circuit board,
A second open area in which no ground pattern exists is provided in at least one direction around the clearance area;
The antenna device according to claim 3, wherein the third radiating conductor is provided along an opening edge of the second open region in a projection region of the antenna block mounting region. The first radiation conductor includes an upper surface conductor portion formed on an upper surface of the base body;
A first side conductor formed on the first side of the base;
A second side conductor portion formed on a second side opposite to the first side;
One end of the first side conductor part is connected to one end of the upper surface conductor part via a gap,
5. The antenna device according to claim 1, wherein the other end of the first side conductor portion is connected to a power supply line on the printed circuit board. The first radiation conductor includes an upper surface conductor portion formed on an upper surface of the base body;
A first side conductor formed on the first side of the base;
A second side conductor portion formed on a second side opposite to the first side;
One end of the first side conductor part is directly connected to one end of the top conductor part,
The other end of the first side conductor portion is connected to a power supply line on the printed board,
The antenna device according to any one of claims 1 to 4, wherein the other end of the third radiation conductor is open. The first radiation conductor includes an upper surface conductor portion formed on an upper surface of the base body;
A first side conductor formed on the first side of the base;
A second side conductor portion formed on a second side opposite to the first side;
One end of the first side conductor part is connected to one end of the upper surface conductor part via a gap,
The other end of the first side conductor part is connected to a power supply line on the printed circuit board, and is connected to a ground pattern provided around a mounting area of the antenna block. Item 5. The antenna device according to any one of Items 1 to 4.   A wireless communication device comprising the antenna device according to claim 1.

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