JP4775423B2 - Antenna device - Google Patents

Description

  The present invention relates to an antenna device, and more particularly to a structure of a multi-resonant antenna having a plurality of antenna resonance points.

  A multi-resonant antenna has attracted attention as one of surface-mounted antennas incorporated in wireless communication devices such as mobile phones (see, for example, Patent Document 1). A multi-resonant antenna is configured such that a plurality of radiation conductors are formed on a dielectric substrate, the feeding points of the radiation conductors are common, and the resonance frequencies are different. For example, one of the two radiation conductors is used for GPS. The antenna and the other can be used as a wireless LAN antenna. It is also possible to increase the resonance frequency bandwidth by slightly shifting the two resonance frequencies so that part of the frequency bands overlap.

Further, Patent Document 2 discloses a first dielectric constant having a different dielectric constant for the purpose of weakening capacitive coupling between the non-feeding side radiation electrode and the feeding side radiation electrode and suppressing mutual interference of resonance between the two radiation electrodes. And a substrate in which the second dielectric substrate is integrated, a non-feeding side radiation electrode is formed on the first dielectric substrate side, and a feeding side radiation electrode is formed on the second dielectric substrate side. An antenna is disclosed.
Japanese Patent No. 4044302 Japanese Patent No. 3596526

In the multiple resonance antenna design, to obtain an antenna operating at the antenna and a high resonance frequency than that operates at a relatively low resonance frequency, a desired resonant frequency f _1, f _2, · · ·, each of f _n A structure in which an antenna element is branched from one power supply is known. In this type of multi-resonant antenna, the size of the antenna element that operates at the lowest resonance frequency f ₁ is the largest. Therefore, in the design, the antenna element having the lower resonance frequency is first designed and then the resonance frequency higher than that is designed. In many cases, the side antenna elements are sequentially designed.

  When it is physically difficult to design an antenna element with a low resonance frequency due to restrictions such as mounting area, it is common to use a material with a high dielectric constant as the material of the substrate as one of the miniaturization methods Has been done. When a high dielectric constant substrate is used, a small antenna having a shorter antenna length than that formed on a substrate having a low dielectric constant can be designed due to the wavelength shortening effect.

However, if an antenna element having a low resonance frequency and an antenna element having a high resonance frequency are arranged together on a common substrate having a high dielectric constant, the antenna element having a high resonance frequency has a wavelength shortening effect. As a result, the antenna element having a higher resonance frequency becomes too small as compared with the antenna element having a lower resonance frequency, and there is a problem in that the radiation characteristic is greatly deteriorated. In particular, this problem becomes more prominent as the lower resonance frequency f ₁ and the higher resonance frequencies f _{2 to} f _n are separated. For example, taking a cellular phone as an example, a monopole antenna having a communication band with a low resonance frequency f ₁ of 850 MHz and a monopole antenna having a communication band with a high resonance frequency fn of 2.4 GHz have the same dielectric constant. In the case of a multi-resonance antenna that is simultaneously mounted on the substrate, the antenna length on the higher resonance frequency side is about 1/3 of that on the lower side.

  Also, antenna mounting is generally performed by soldering on a printed circuit board or by mechanical fixing. However, because of the ease of antenna installation, the antenna can be more reliably secured by mechanical fixing. There is an increasing demand for fixing the antenna to the housing of the wireless communication apparatus in which the printed circuit board is accommodated. However, since a material with a high dielectric constant is a material with extremely low elasticity such as ceramic, it has been difficult to mechanically fix it to a printed circuit board or a case by using the elastic force of the base.

  The present invention solves the above problems, and an object of the present invention is to improve the radiation efficiency of an antenna element that operates at a high resonance frequency, and to easily and reliably perform mechanical fixing to a printed circuit board or the like. An object of the present invention is to provide a resonant antenna device.

In order to solve the above problems, an antenna device according to the present invention is integrated with a first base having a first dielectric constant and a second base having a second dielectric constant lower than the first dielectric constant. The second base, the first radiation conductor formed on the main surface of the first base and resonating at the first resonance frequency, and formed on the main surface of the second base than the first resonance frequency. A second radiating conductor that resonates at a high second resonance frequency, the first and second radiating conductors having one end connected at the boundary between the first base and the second base, and the boundary The second base is more flexible than the first base, and the first base is incorporated into a part of a flat region of the second base. The first substrate is surrounded by the second substrate .

According to the present invention, an antenna element having a low resonance frequency is formed on a first substrate using a substrate in which a first substrate having a high dielectric constant and a second substrate having a low dielectric constant are integrated. Since the antenna element on the higher resonance frequency side is formed on the substrate 2, the antenna element on the higher resonance frequency side becomes too small, and the problem that the radiation characteristic is greatly degraded can be solved. . That is, it is possible to realize a multi-resonant antenna that is small and has excellent radiation characteristics. Furthermore, according to this configuration, a multi-resonant antenna having a large frequency difference can be realized, and the remarkable effects of the present invention can be obtained. Furthermore, since the first base is incorporated in the second base and the first base and the second base are bonded on a plurality of side surfaces, external stress such as a drop impact is applied. However, both are not separated, and a highly reliable antenna device can be provided.

  The antenna device according to the present invention is connected near one end of the first radiation conductor, connected to the first through-hole conductor penetrating the first base, and near one end of the second radiation conductor. It is preferable to further include a second through-hole conductor that penetrates through. The antenna device according to the present invention preferably further includes first and second through-hole conductors connected to one end of the second radiating conductor and penetrating the second base. In this case, the first through-hole conductor is particularly preferably a feeding through-hole conductor connected to the feeding line, and the second through-hole conductor is a short through-hole conductor connected to the ground. Is particularly preferred. According to this configuration, it is possible to realize a multiple resonance antenna in which both the first and second antenna elements are inverted F antennas.

  In the present invention, it is preferable that the second base is integrally provided with a fixing member for fixing to the printed circuit board or a housing that accommodates the printed circuit board. According to this configuration, a material having a low dielectric constant has a high flexibility, and a part of the second base is used as a fixing member, so that there is no need to prepare a special fixing tool. Can be mechanically fixed on the printed circuit board.

  The fixing member according to the present invention preferably has a claw structure engaged with a printed circuit board or a housing. According to this, it is possible to easily realize a fixing structure with respect to the printed circuit board by utilizing the characteristic of the low dielectric constant material having high elasticity. The fixing member of the present invention is also preferably a protruding member that is inserted into a hole provided in a printed circuit board or a housing. If the tip of the protruding member is crushed so as not to come out of the hole, the antenna can be fixed to the printed circuit board.

  ADVANTAGE OF THE INVENTION According to this invention, the radiation efficiency of the antenna element which operate | moves on the side with a high resonant frequency can be improved, and the antenna apparatus which can be fixed on a printed circuit board easily and reliably can be provided.

  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 an antenna device 100 according to a first embodiment of the present invention. FIG. 2 is a schematic development view of the antenna device 100 shown in FIG.

  As shown in FIGS. 1 and 2, the antenna device 100 is a multi-resonant antenna, and includes a base 10 composed of first and second bases 11 and 12 and a first base 11 formed on the top surface of the first base 11. 1 radiating conductor 13, a second radiating conductor 14 formed on the upper surface of the second base 12, and a feed through-hole conductor (first through-hole conductor) connected in the vicinity of one end 13 a of the first radiating conductor 13. Hole conductor) 15, a short through-hole conductor (second through-hole conductor) 16 connected in the vicinity of one end 14 a of the second radiation conductor 14, and a feeding electrode 17 formed on the bottom surface of the first base 11. And a ground electrode 18 formed on the bottom surface of the second substrate 12.

Base 10 includes a first substrate 11 having a first dielectric constant epsilon _r1, made from a second substrate 12 having a second dielectric constant epsilon _r2 lower than the first dielectric constant epsilon _r1, the first The side surface of the base 11 and the side surface of the second base 12 are bonded together, and both are integrated. As the material of the first base 11, for example, ceramic or resin can be used, and the dielectric constant _εr1 can be set to 30, for example, but is not limited thereto. As a specific material of the first substrate 11, it is preferable to use a material obtained by mixing TiO ₂ as a filler with a polymer alloy such as polycarbonate ABS. The material of the second substrate 12 is preferably a resin, and the dielectric constant ε _r2 can be set to 3, for example, but is not limited thereto. As a specific material of the second substrate 12, it is preferable to use a polymer alloy material such as polycarbonate ABS. Thus, when the 1st and 2nd base | substrates 11 and 12 have the same resin material as a main component, both integration is easy. The size of the first and second bases 11 and 12 can be appropriately set according to the target resonance frequency.

The first radiation conductor 13 functions as the first antenna element ANT1 that resonates at the first resonance frequency f ₁ , and its antenna length is longer than that of the second radiation conductor 14. The second radiating conductor 14, which functions as a second antenna element ANT2 that resonates at first resonant frequency f a second resonant frequency f ₂ higher than _1, the antenna length is first It is shorter than the radiation conductor 13. One end 13a of the first radiating conductor 13 and one end 14a of the second radiating conductor 14 are connected at the boundary B between the first base 11 and the second base 12, and the first radiating conductor 13 and the first radiating conductor 13 The two radiating conductors 14 extend from the boundary B between the first base body 11 and the second base body 12 so as to be separated from each other in opposite directions. The other end 13b of the first radiation conductor 13 and the other end 14b of the second radiation conductor 14 are both open ends.

  The first through-hole conductor 15 is a feeding point common to the first and second antennas ANT1, ANT2, and is provided in the vicinity of the boundary B between the first base body 11 and the second base body 12, One base 11 is penetrated. The upper end of the first through-hole conductor 15 is connected to one end 13 a of the first radiation conductor 13, and the lower end is connected to a power supply line on the printed circuit board via a power supply electrode 17. The second through-hole conductor 16 is also provided near the boundary between the first base body 11 and the second base body 12, but unlike the first through-hole conductor 15, it penetrates the second base body 12. ing. Therefore, the upper end of the second through-hole conductor 16 is connected to one end 14a of the second radiation conductor 14, and the lower end is connected to the ground pattern on the printed circuit board via the ground electrode 18. With the above configuration, in the present embodiment, the first and second antenna elements ANT1, ANT2 together constitute an inverted F antenna.

  In the present embodiment, the first through-hole conductor 15 passes through the first through-hole conductor 11, and the second through-hole conductor 16 passes through the second through-hole conductor 12. When both the first and second through-hole conductors 15 and 16 penetrate the first base 11, the electromagnetic coupling between the through-hole conductors 15 and 16 becomes very strong, and the antenna elements ANT1 and ANT2 Bandwidth is reduced. Moreover, the impedance of each antenna element changes greatly only by a slight shift in the positional relationship between the through-hole conductors 15 and 16, and the variation in impedance increases. However, when the first and second through-hole conductors 15 and 16 penetrate the first and second base bodies 11 and 12 as in the present embodiment, electromagnetic field coupling between the through-hole conductors is achieved. The desired bandwidth can be ensured. In addition, it is possible to suppress variation in impedance due to positional deviation between through-hole conductors.

  As described above, the antenna device 100 according to the present embodiment uses a material having a relatively low dielectric constant as the material of the second base 12 on which the high frequency side antenna element ANT2 is formed. In order to obtain an antenna with a high resonance frequency using a high dielectric constant substrate on the high frequency side, the antenna length must be significantly shortened, and if the antenna length is significantly shortened, the radiation efficiency is greatly reduced. There's a problem. However, when a low dielectric constant material is used on the high frequency side, the antenna length can be made relatively long even when trying to obtain a high resonance frequency. That is, the high frequency side antenna element is not reduced more than necessary, and the radiation characteristics of the high frequency side antenna element can be improved.

  In order to increase the antenna length of the second antenna element ANT2, it is preferable that the belt-like second radiation conductor 14 has a folded structure. As described above, in order to obtain a desired resonance frequency under the condition where the dielectric constant of the second base 12 is lowered, the antenna length must be increased, but when the size of the base 12 is the same. However, there is a possibility that a desired antenna length cannot be ensured linearly, and there is a problem that the second base 12 must be enlarged if it is to be ensured linearly. However, with such a folded structure, a desired antenna length can be ensured without increasing the size of the second substrate 12, and the radiation characteristics of the antenna element on the high frequency side can be improved.

  As described above, the antenna device 100 according to the present embodiment includes the first base body 11 having a high dielectric constant and the second base body 12 having a low dielectric constant, and the first base body 11 has a low resonance frequency. Since the antenna element ANT1 is formed and the antenna element ANT2 having a higher resonance frequency is formed on the second substrate 12, the antenna element ANT2 having a higher resonance frequency is too small, and the radiation characteristics are greatly increased. Can be solved. That is, it is possible to realize a multi-resonant antenna that is small and has excellent radiation characteristics.

  FIG. 3 is a schematic perspective view showing the configuration of the antenna device 200 according to the second embodiment of the present invention.

  As shown in FIG. 3, the antenna device 200 is characterized in that both the first and second through-hole conductors 15 and 16 are formed so as to penetrate the second base 12, and one end of each of the antenna devices 200 is formed. The second radiation conductor 14 is connected to the vicinity of one end thereof. Since other configurations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  As described above, when both the first and second through-hole conductors 15 and 16 penetrate the first base body 11, the electromagnetic coupling between the through-hole conductors 15 and 16 becomes very strong, and each antenna The bandwidth of the elements ANT1, ANT2 is reduced. In addition, the impedance of each antenna element changes greatly only by slightly shifting the positional relationship between the through-hole conductors 15 and 16, and the variation in impedance increases. However, when both the first and second through-hole conductors 15 and 16 penetrate the second base 12 as in the present embodiment, the electromagnetic coupling between the through-hole conductors can be suppressed. The desired bandwidth can be ensured. In addition, it is possible to suppress variation in impedance due to positional deviation between through-hole conductors.

  FIG. 4 is a schematic perspective view showing the configuration of the antenna device 300 according to the third embodiment of the present invention. FIG. 5 is a developed view of the antenna device 300 shown in FIG.

  As shown in FIGS. 4 and 5, the antenna device 300 has a structure in which the first base 11 is surrounded by the second base 12, and the end of the second base 12 in the longitudinal direction. Is that a fixing member 12w for the printed circuit board is formed. For this reason, most of the substrate is constituted by the second substrate 12, and the side surface of the first substrate 11 is not exposed and is covered by the second substrate 12. Other configurations are the same as those in the first embodiment, and thus the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  The antenna device 300 of the present embodiment includes a fixing member 12w for fixing itself on a printed circuit board. The fixing member 12w is a part of the second base 12 and has a claw structure protruding downward from the bottom surface side of the second base 12. In general, a material with a high dielectric constant is hard and has a low elastic force, and therefore it is very difficult to use it as a fixing member. On the other hand, a material with a low dielectric constant is soft and has a large elastic force. Suitable for use. In the present embodiment, the first base 11 having a high dielectric constant is not provided with a claw structure, and the second base 12 having a low dielectric constant is provided with a claw structure, whereby the antenna device 300 is mechanically mounted on a printed board. Can be fixed to.

  As described above, the antenna device 300 according to the third embodiment is used as a fixing member for fixing a part of the second base 12 having a low dielectric constant and high flexibility onto the printed circuit board. Therefore, in addition to the operational effects of the antenna device 100 according to the first embodiment, the antenna device 300 can be mechanically fixed on the printed circuit board without using a special fixing tool.

  Further, according to the third embodiment, the first base body 11 is incorporated in the second base body 12, and the first base body 11 and the second base body 12 are bonded to each other at a plurality of side surfaces. Therefore, even when an external stress such as a drop impact is applied, the two are not separated, and a highly reliable antenna device can be provided.

  FIG. 6 is a schematic perspective view showing the configuration of the antenna device 400 according to the fourth embodiment of the present invention. FIG. 7 is a schematic cross-sectional view showing an example of a built-in structure of the antenna device 400.

  As shown in FIG. 6, in the antenna device 400, the second base 12 is not a block shape, but uses a plate-like base curved in a substantially U shape. Most of the substrate is constituted by the second substrate 12, and the first substrate 11 is incorporated in a part of the flat region. Therefore, the second base body 12 surrounds the first base body 11. Then, as shown in FIG. 7, the claw structure 12 x formed at the curved end portion of the second base 11 is configured to be fitted to the printed circuit board 20.

  As shown in FIG. 7, when the antenna device 400 is fixed to the printed circuit board 20, the main part of the base on which the radiation conductors 13 and 14 are formed is lifted from the printed circuit board 20 in the antenna device 400. . However, in the present embodiment, the pins 21 and 22 are inserted into the first and second through-hole conductors 15 and 16, respectively, and the tips of the pins 21 and 22 are in contact with the power supply line and the ground on the printed circuit board 20. Thus, electrical connection to them is ensured.

  FIG. 8 is a schematic cross-sectional view showing another example of the built-in structure of the antenna device 400.

  As shown in FIG. 8, the antenna device 400 according to the present embodiment has a structure in which the claw structure 12 y formed at the curved end of the second base 11 is fitted to the housing 23 for housing the printed circuit board 20. It has become. As described above, since the second base 12 is more elastic than the first base 11, engagement with the housing 23 is possible by providing the claw structure 12y. When the printed circuit board 20 is housed in the housing 23, the main part of the base on which the radiation conductors 13 and 14 are formed in the antenna device 400 fixed to the housing 23 is in a state of being lifted from the printed circuit board 20. Yes. However, in the present embodiment, the pins 21 and 22 are inserted into the first and second through-hole conductors 15 and 16, respectively, and the tips of the pins 21 and 22 are in contact with the power supply line and the ground on the printed circuit board 20. Thus, electrical connection to them is ensured.

  FIG. 9 is a schematic cross-sectional view showing still another example of the built-in structure of the antenna device 400.

  As shown in FIG. 9, in the antenna device 400 according to the present embodiment, the tip end portion of the protruding member 20z formed on the curved end portion of the second base body 11 is inserted into the hole 20a on the printed circuit board 20, and the printed circuit board. 20 is fixed. As described above, since the second base 11 is a resin and has thermoplasticity, the protruding member 12z is passed through the hole 20a on the printed circuit board 20, and the tip is crushed by hot pressing. The projection member 20z can be deformed so as not to come out of the hole 20a and can be engaged with the printed circuit board 20. When the antenna device 400 is fixed to the printed circuit board 20, the main part of the base on which the radiation conductors 13 and 14 are formed of the antenna device 400 fixed to the printed circuit board 20 is lifted from the printed circuit board 20. . However, in the present embodiment, the pins 21 and 22 are inserted into the first and second through-hole conductors 15 and 16, respectively, and the tips of the pins 21 and 22 are in contact with the power supply line and the ground on the printed circuit board 20. Thus, electrical connection to them is ensured.

  As described above, the antenna device 400 according to the present embodiment includes the first base 11 having a relatively high dielectric constant and the second base 12 having a relatively low dielectric constant. Since the antenna element ANT1 having the lower resonance frequency is formed and the antenna element ANT2 having the higher resonance frequency is formed on the second substrate 12, the antenna element ANT2 having the higher resonance frequency is too small. Therefore, the problem that the radiation characteristic is greatly deteriorated can be solved. That is, it is possible to realize a multi-resonant antenna that is small and has excellent radiation characteristics. Further, according to the present invention, since a part of the second base 12 having a low dielectric constant and high flexibility or plasticity is used as a fixing member for fixing to the printed circuit board or the housing, a special member is used. The antenna device can be mechanically fixed on the printed circuit board without using a fixing tool.

  Furthermore, according to the fourth embodiment, the first base body 11 is incorporated in the second base body 12, and the first base body 11 and the second base body 12 are bonded on a plurality of side surfaces. Therefore, even when an external stress such as a drop impact is applied, the two are not separated, and a highly reliable antenna device can be provided.

  FIG. 10 is a schematic perspective view showing the configuration of the antenna device 500 according to the fifth embodiment of the present invention.

  As shown in FIG. 10, in the antenna device 500, the antenna length of the second radiating conductor 14 constituting the second antenna element ANT2 is longer than that of the first radiating conductor 13 constituting the first antenna element ANT1. ing. In the vicinity of the feeding point, as in the first embodiment, the first radiating conductor 13 and the second radiating conductor 14 are separated in opposite directions from the boundary B between the first base body 11 and the second base body 12. However, the second radiating conductor 14 is immediately folded back near the feeding point, and is extended in parallel with the first radiating conductor 13.

  As described above, the antenna device 500 according to the present embodiment includes the first base 11 having a high dielectric constant and the second base 12 having a low dielectric constant, and the first base 11 has an antenna on the low resonance frequency side. Since the element ANT1 is formed and the antenna element ANT2 on the high resonance frequency side is formed on the second base 12, the antenna element ANT2 on the high resonance frequency side becomes too small, and the radiation characteristics are greatly deteriorated. Can be solved. That is, it is possible to realize a multi-resonant antenna that is small and has excellent radiation characteristics. In addition, according to the present invention, since a part of the second base having a low dielectric constant and high flexibility is used as a fixing member for fixing to a housing attached to the printed circuit board, a special fixing is performed. The antenna device can be mechanically fixed on the printed circuit board without using tools.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention, and it goes without saying that these are also included in the present invention. .

  For example, in the above-described embodiment, the first and second radiation conductors 13 and 14 are formed on the upper surfaces of the first and second bases 11 and 12, respectively. It may be formed on the side surface. That is, it may be formed on any surface (main surface) excluding the bottom surface of the substrate.

Further, in the above embodiment that although the case having two antenna elements having a resonant frequencies f _1, f _2, and the present invention is not limited to such a case, the number of antenna elements May be three or more.

  In the above embodiment, the first through-hole conductor 15 connected to one end of the first radiating conductor 11 is used for feeding, and the through-hole conductor 16 connected to one end of the second radiating conductor 12 is used for short-circuiting. However, the present invention is not limited to such a configuration, and depending on the design of the multi-resonant antenna, the through-hole conductor 15 may be used for short-circuiting and the through-hole conductor 16 may be used for feeding.

FIG. 1 is a schematic perspective view showing the structure of an antenna device 100 according to a first embodiment of the present invention. FIG. 2 is a schematic development view of the antenna device 100 shown in FIG. FIG. 3 is a schematic perspective view showing the structure of the antenna device 200 according to the second embodiment of the present invention. FIG. 4 is a schematic perspective view showing the configuration of the antenna device 300 according to the third embodiment of the present invention. FIG. 5 is a schematic development view of the antenna device 300 shown in FIG. FIG. 6 is a schematic perspective view showing the configuration of the antenna device 400 according to the fourth embodiment of the present invention. FIG. 7 is a schematic cross-sectional view showing an example of a built-in structure of the antenna device 400. FIG. 8 is a schematic cross-sectional view showing another example of the built-in structure of the antenna device 400. FIG. 9 is a schematic cross-sectional view showing still another example of the built-in structure of the antenna device 400. FIG. 10 is a schematic perspective view showing the configuration of the antenna device 500 according to the fifth embodiment of the present invention.

Explanation of symbols

10 Base 11 First Base 12 Second Base 12w Fixing Member 12x Claw Structure 12y Claw Structure 12z Projection Member 13a First Radiation Conductor One End 13b First Radiation Conductor Other End 13 First Radiation Conductor 14a Second One end 14b of the second radiation conductor 14 The other end 14 of the second radiation conductor Second radiation conductor 15 First through-hole conductor 16 Second through-hole conductor 20 Printed circuit board 20a Hole 20z Projection member 21, 22 Pin 23 Housing 100 Antenna device 200 Antenna device 300 Antenna device 400 Antenna device 500 Antenna device B Boundary

Claims (8)

A first substrate having a first dielectric constant;
A second substrate having a second dielectric constant lower than the first dielectric constant and integrated with the first substrate;
A first radiation conductor formed on a main surface of the first base and resonating at a first resonance frequency;
A second radiation conductor formed on the main surface of the second base and resonating at a second resonance frequency higher than the first resonance frequency;
It said first and second radiation conductors are connected at the boundary between the one end to each other and said first substrate a second substrate, and are extended so as divided in opposite directions in the vicinity of the boundary ,
The second base body is more flexible than the first base body, and the first base body is incorporated in a part of a flat region of the second base body, and the periphery of the first base body is An antenna device surrounded by the second substrate .   The antenna device according to claim 1, wherein the second base is a plate-like member curved in a substantially U shape. The second radiating conductor extends in a direction opposite to the first base in the vicinity of the boundary, and is folded back from the first portion and parallel to the first radiating conductor. The antenna device according to claim 1, further comprising an extended second portion. A first through-hole conductor connected near the one end of the first radiation conductor and penetrating the first base;
4. The apparatus according to claim 1 , further comprising a second through-hole conductor connected to the vicinity of the one end of the second radiating conductor and penetrating the second base. 5. Antenna device. 4. The apparatus according to claim 1 , further comprising first and second through-hole conductors connected to the vicinity of the one end of the second radiation conductor and penetrating the second base. 5. The antenna device described. 6. The antenna device according to claim 1, wherein the second base body integrally includes a printed board or a fixing member for fixing the printed circuit board to a housing that accommodates the printed board. . The antenna device according to claim 6 , wherein the fixing member has a claw structure engaged with the printed circuit board or the housing. The antenna device according to claim 6 , wherein the fixing member is a protruding member inserted into a hole provided in the printed circuit board or the housing.

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