JP2002290142A - Antenna device and method and apparatus for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely adjust the resonance frequency of an antenna pattern to a desired frequency and to efficiently transmit/receive a radio wave, having the desired frequency. SOLUTION: A chip antenna device 100 for transmitting/receiving the radio wave is provided with a substrate 1, constituted of an insulation member having a prescribed shape, a conductor 3 which has an I-type antenna pattern shape and is disposed in the substrate 1 and an electrode 7 pulled out from the conductor 3; the electrode 7 applies a voltage of 800 MHz to an arbitrary point on the conductor 3 and is pulled out from a specified position, where the conductor 3 resonates by the voltage so as to be formed; and a feed point 5, where the antenna pattern resonates is determined in the specified position of the conductor 3, and the resonance frequency of the device 100 is adjusted surely to 800 MHz.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device suitable for application to a chip antenna device built in a portable telephone for transmitting and receiving radio waves, a method of manufacturing the same, and an antenna manufacturing device.

[0002]

2. Description of the Related Art In recent years, wireless communication devices such as portable telephones include:
There is an increasing demand for power saving. Along with this, chip antenna devices mounted on wireless communication devices are increasingly required to have higher performance.

FIGS. 6A and 6B are a plan view and a sectional view taken along the line X1-X2, respectively, showing a configuration example of a chip antenna device 90 according to a conventional example. As shown in FIG. 6A, the chip antenna device 90 includes a base 91 made of an organic resin-based insulator, a conductor 92 having an I-shaped antenna pattern shape, provided on the base 91, and drawn from the conductor 92. Electrode 93.

[0004] As shown in FIG.
2, an opening 94 that penetrates the base 91
Are formed along the side walls of the. The chip antenna device 90 transmits a desired frequency through this electrode 93,
For example, by supplying a high frequency signal of 800 MHz, the antenna pattern resonates.

[0005]

According to the conventional chip antenna device 90, the lead-out position of the electrode 93 with respect to the conductor 92 is, for example, the conductor end where the antenna pattern resonates most at a frequency of 800 MHz. The optimum distance L1 from the unit is searched for and obtained, and this is created as one standard chip antenna device. Following the optimum distance L1 of the standard chip antenna device, the extraction position of the electrode 93 with respect to the conductor 92 of another chip antenna device is determined, and the side wall of the opening 94 penetrating the base 91 at the extraction position. The electrodes are formed along.

For this reason, there is a possibility that the electrode 93 may be formed under the influence of variations in the manufacturing process of the conductor 92 and the opening 94. If the electrode 93 is formed at a position different from the predetermined position due to this effect, the conductor 9
The antenna pattern 2 does not resonate with a current or radio wave of 800 MHz, and the chip antenna device (hereinafter also referred to as an antenna device) 90 may not be able to transmit and receive a radio wave of 800 MHz satisfactorily. Moreover, there is a possibility that useless transmission power is consumed.

Accordingly, the present invention has been made to solve such a problem, and enables the resonance frequency of an antenna pattern to be tuned to a desired frequency without fail, and to improve the efficiency of radio waves having a desired frequency. An object of the present invention is to provide an antenna device capable of transmitting and receiving signals well, a method of manufacturing the same, and an antenna manufacturing device.

[0008]

In order to solve the above-mentioned problems, an antenna device according to the present invention is an antenna device for transmitting and receiving a radio wave, comprising: a base made of an insulating member having a predetermined shape; A conductor having a pattern shape and provided on a base, and an electrode extracted from the conductor, the electrode applies a measurement signal of a desired frequency to an arbitrary point on the conductor, and is applied. The conductor is drawn out of the position where the conductor resonates by the measured signal.

According to the antenna device of the present invention, a feeding point at which the antenna pattern resonates at a specific position of the conductor can be determined, and the resonance frequency of the device can be reliably adjusted to a desired frequency.

[0010] In a method of manufacturing an antenna device according to the present invention, there is provided a method of manufacturing an antenna device for transmitting and receiving radio waves, comprising: forming a conductor having a predetermined antenna pattern shape on a base made of a dielectric member; A measurement signal having a desired frequency is applied to an arbitrary point, and a position at which the conductor resonates is searched by the measurement signal, and an electrode is formed by extracting from the specified position.

According to the method of manufacturing an antenna device according to the present invention, a feeding point at which the antenna pattern resonates can be determined at a specific position of the conductor, so that an antenna device that reliably resonates at a desired frequency can be manufactured with good reproducibility. it can.

Further, an antenna manufacturing apparatus according to the present invention is an antenna manufacturing apparatus for manufacturing an antenna device having a conductor having a predetermined antenna pattern shape on a base made of an insulating member. And a position search means for searching for a position at which the conductor resonates with the measurement signal.

According to the antenna manufacturing apparatus of the present invention,
A feed point at which the antenna pattern resonates at a specific position on the conductor can be determined, and an antenna device having a feed point adjusted to a desired frequency can be manufactured with good reproducibility.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an antenna device and a method of manufacturing the same according to an embodiment of the present invention will be described with reference to the drawings.
In addition, the antenna manufacturing apparatus will be described in detail. (1) Antenna device FIG. 1 shows a chip antenna device 10 according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a configuration example of a No. 0. In this embodiment, an electrode drawn from a conductor having a predetermined antenna pattern shape applies a measurement signal of a desired frequency to an arbitrary point on the conductor, and is pulled out from a position where the conductor resonates by the measurement signal. And ensure that the resonance frequency of the device can be tuned to the desired frequency,
A wireless radio wave having a desired frequency can be transmitted and received efficiently.

The chip antenna device 100 shown in FIG.
It is an example of the antenna device according to the present invention. The chip antenna device 100 has a base 1 made of an insulating member having a predetermined shape. The substrate 1 supports a conductor and an electrode on its surface. The base 1 is made of, for example, an organic resin-based insulator obtained by combining glass fiber and epoxy resin. The size of the base 1 is, for example, 6
It is about 10 mm × width 10 mm × height 4 mm.

The chip antenna device 100 has a conductor 3 having a predetermined antenna pattern shape and provided on the base 1. The conductor 3 is an antenna body of the chip antenna device 100 and has, for example, an I-shaped antenna pattern shape. The conductor 3 is made of a conductive member such as copper, and has a thickness of about 100 μm.

Further, the chip antenna device 100 has an electrode 7 drawn from the conductor 3. This electrode 7
Is formed by applying a measurement signal of a desired frequency to an arbitrary point on the conductor 3 and drawing out from a position where the conductor resonates by the applied measurement signal.

For example, a measurement signal of a desired frequency is set to 800
MHz. In this case, scanning is performed by applying a voltage of 800 MHz to an arbitrary point on
Search for a position that resonates with a voltage of 00 MHz. Next, 8
A position on the conductor 3 that resonates with a voltage of 00 MHz (hereinafter also referred to as a specific position) is specified. The electrode 7 is drawn from this specific position.

Since the electrode 7 is reliably connected to the conductor 3 at a specific position, when a voltage of 800 MHz is applied to the electrode 7, the conductor 3 resonates and efficiently transmits radio waves. In addition, the conductor 3 resonates with the 800 MHz radio wave and can efficiently receive the radio wave. In FIG. 1, the electrode 7 is drawn out of the conductor 3 along a side wall of an opening provided at a specific position of the conductor 3.

As described above, according to the chip antenna device 100 of the present invention, the electrode 7 drawn from the conductor 3 having the I-shaped antenna pattern shape applies an 800 MHz voltage to an arbitrary point on the conductor 3. The conductor 3 is drawn out of a position where the conductor 3 resonates by the applied voltage.

Therefore, the feeding point 5 at which the antenna pattern resonates at a specific position of the conductor can be determined, and the resonance frequency of the device can be reliably adjusted to the frequency of 800 MHz. As a result, it is possible to efficiently transmit and receive 800 MHz wireless radio waves.

(2) Antenna Manufacturing Apparatus FIG. 2 is a perspective view showing a configuration example of an antenna manufacturing apparatus 200 according to the present invention. The antenna manufacturing apparatus 200 is an example of the antenna manufacturing apparatus according to the present invention, and manufactures the above-described chip antenna apparatus 100.

The antenna manufacturing apparatus 200 applies a measurement signal of a desired frequency to an arbitrary point on the conductor 3 of the chip antenna device, and searches for a position where the conductor 3 resonates by the measurement signal. 50. The measurement signal of the desired frequency is, for example, a voltage of 800 MHz. In this case, the conductor 3
800 MHz voltage is applied to any point of
A specific position where the conductor 3 resonates at a voltage of Hz is searched. This position search means is composed of a plurality of devices described below.

First, the position searching means 50 includes a drill blade 52 as an example of a contact contacting an arbitrary point on the conductor 3.
It has. The tip of the drill blade 52 comes into contact with an arbitrary point on the conductor 3 and applies a measurement signal having a desired frequency to the conductor 3. The drill blade is provided with a drive unit (not shown), and the drive unit enables the drill blade to move in the X-axis, Y-axis, and Z-axis directions.

Further, as shown in FIG.
0 has a power supply 54 as an example of a signal generator. The power supply 54 applies a measurement signal having a desired frequency, for example, an AC voltage of 800 MHz to the drill blade 52. The output range of the power supply 54 is, for example, a frequency of 50 Hz to 1.9 GHz and a voltage of about 1 mV to 200 V.

Further, the position searching means 50 has a voltage measuring device 56 as an example of a signal measuring device. The voltage measuring device 56 is provided between the drill blade 52 and the power supply 54, and monitors the 800 MHz voltage value applied to the drill blade 52.

As described above, the position searching means 50 comprises the drill bit 52, the power supply 54 for applying a voltage of 800 MHz to the drill bit, and the voltage measuring device 56 for indicating the voltage value applied to the drill bit 54. Have been.

Using this position search means 50, for example, 8
When searching for a position where the conductor 3 resonates with a voltage of 00 MHz, the conductor 3 may be scanned with the drill blade 52 to which a voltage of 800 MHz has been applied. If the conductor 3 resonates at a specific position on the conductor 3, the voltage measuring device 56
Is the highest voltage value, so that the conductor 3
Can be specified at the position where the resonance occurs.

Since the position searching means 50 has the drill blade 52 as a contact, it can not only scan the conductor 3 but also drill the conductor 3 and the base 1. That is, after searching for a specific position of the conductor 3 at the tip of the drill blade 52, an opening can be formed at this specific position. After the opening is formed, if the electrode is provided so as to be drawn out of the conductor 3 along the side wall of the opening, a feeding point at which the conductor resonates at 800 MHz can be determined.

Further, an automatic control mechanism for searching for a specific position from the measured value of the voltmeter and automatically forming an opening by driving a drill bit based on the position information of the searched specific position is provided by a position searching means 50. It is good to provide in.

As described above, according to the antenna manufacturing apparatus 200 of the present invention, a voltage of 800 MHz is applied to an arbitrary point on the conductor 3 having a predetermined antenna pattern shape, and the conductor resonates by this voltage. It is provided with a position search means 50 for searching for a position.

Therefore, the feeding point at which the antenna pattern resonates at a specific position of the conductor 3 can be determined, and the power feeding point can be set to 800 MHz.
Can be manufactured with good reproducibility. This allows the chip antenna device 100 to resonate at 800 MHz and transmit and receive radio waves efficiently.
Can be manufactured with good yield and high reliability.

(3) Method of Manufacturing Antenna Device Next, a method of manufacturing the chip antenna device 100 shown in FIG. 1 will be described. Here, a conductor 3 having a predetermined antenna pattern shape is formed on a base 1 made of a dielectric member, and a specific position of the conductor 3 is searched using the above-described antenna manufacturing apparatus 200. From the searched specific position, It is assumed that the electrode 7 is drawn out.

First, as shown in FIG. 4A, a substrate 1 made of an organic resin-based insulator obtained by combining, for example, glass fiber and epoxy resin is prepared. In order to improve the adhesion between the base 1 and the conductor, the upper surface of the base 1 is previously roughly polished with a grindstone or the like, so that a large number of fine irregularities are formed. The size of the base 1 is, for example, about 6 mm long × 10 mm wide × 4 mm high.

Next, a conductive member for forming the conductor 3 is formed on the upper surface of the base 1. This conductive member has a thickness of, for example, 100 μm.
m copper foil. Since the upper surface of the base shown in FIG. 4A is roughened, the conductive member can be formed with good adhesion. further,
As shown in FIG. 4B, the conductive member 29 is formed so as to cover a conductor forming region having, for example, an I-shaped antenna pattern shape.
A resist pattern 31 is formed thereon. This resist pattern 31 is formed by photolithography.

After forming the resist pattern 31, the conductive member 29 exposed from the resist pattern 31 is selectively etched and removed. Thereby, as shown in FIG. 4C, the conductor 3 having the I-shaped antenna pattern shape can be formed on the base 1. Selective etching of conductive members
For example, it is performed by wet etching using a Fe ₂ Cl ₃ solution. Of course, it is not limited to the Fe ₂ Cl ₃ solution, and any chemical solution that can selectively remove the conductive member without attacking the resist pattern can be used without any particular limitation.

Next, using the above-described antenna manufacturing apparatus 200, a position where the conductor 3 on the base 1 resonates at a desired frequency is searched. First, as shown in FIG. 5A, the drill blade 52 to which a voltage of, for example, 800 MHz is applied is brought into contact with an arbitrary point on the conductor 3. Then, the conductor 3 is scanned to search for a position where the conductor 3 resonates at a voltage of 800 MHz.

The resonance of the conductor 3 can be confirmed by the voltage measuring device 56 showing the maximum voltage value. That is, the voltage measuring device 56
The position on the electric conductor 3 that is in contact with the tip of the drill blade 52 when indicates the maximum voltage value is the specific position.

After confirming the specific position on the conductor 3, the drill 3 is used to drill the conductor 3 and the base 1 at a specific position, and as shown in FIG. Form. At this time, it is preferable that the side wall of the opening 17 be slightly uneven. This is to enhance the adhesion between the conductive member and the side wall when forming the conductive member on the side wall in a later step. The size of the opening 17 is, for example, about 500 μm in diameter.

After the opening 17 is formed, as shown in FIG. 5C, a resist pattern 33 is formed by photolithography on the entire surface of the substrate 1 except for the side wall of the opening 17 and the vicinity of the opening. After the resist pattern 33 is formed, a conductive member is deposited on the side wall of the opening 17 and in the vicinity of the opening by, for example, electroless plating to form the electrode 7. The conductive member is, for example, copper or the like, and the deposited thickness is about 100 μm. After forming the electrode 7, the resist pattern 33 is removed, and the chip antenna device 100 shown in FIG. 1 is completed.

As described above, according to the antenna device manufacturing method of the present invention, a voltage of 800 MHz is applied to an arbitrary point of the conductor 3 having the I-shaped antenna pattern shape, and the conductor 3 is resonated by the voltage. When you do it is like specifying the position.

Accordingly, the feeding point 5 at which the antenna pattern resonates at a specific position of the conductor 3 can be determined.
The chip antenna device 100 that reliably resonates at the frequency of 0 MHz can be manufactured with high reproducibility. As a result, 800M
Accordingly, a chip antenna device capable of efficiently transmitting and receiving a radio wave of 1 Hz can be manufactured with higher yield.

In this embodiment, a chip antenna device having a conductor having an I-shaped antenna pattern and transmitting and receiving a radio wave of 800 MHz has been described. However, the present invention is not limited to this. The present invention can be widely applied to a chip antenna device that includes a conductor having an arbitrary shape such as a loop antenna and transmits and receives a radio wave of an arbitrary frequency, a manufacturing method thereof, and an antenna manufacturing device.

[0044]

According to the antenna device of the present invention, the electrode extracted from the conductor having a predetermined antenna pattern shape applies a measurement signal of a desired frequency to an arbitrary point on the conductor, and this measurement is performed. The conductor is drawn from a position where the conductor resonates by a signal.

With this configuration, the feeding point at which the antenna pattern resonates at a specific position on the conductor can be determined, and the resonance frequency of the device can be tuned to a desired frequency without fail. Therefore, a radio wave having a desired frequency can be transmitted and received efficiently, and a loss in transmission power can be reduced.

Further, according to the antenna device manufacturing method of the present invention, a measurement signal having a desired frequency is applied to an arbitrary point of the conductor having a predetermined antenna pattern shape, and the conductor is caused by the measurement signal. The position at which resonance occurs is specified.

With this configuration, the feeding point at which the antenna pattern resonates at a specific position on the conductor can be determined, so that an antenna device that reliably resonates at a desired frequency can be manufactured with good reproducibility. Therefore, an antenna device capable of efficiently transmitting and receiving a radio wave having a desired frequency can be manufactured with a higher yield than in the related art.

Further, according to the antenna manufacturing apparatus of the present invention, a measurement signal of a desired frequency is applied to an arbitrary point on a conductor having a predetermined antenna pattern shape, and the conductor resonates by the measurement signal. It is provided with position search means for searching for a specific position.

With this configuration, a feed point at which the antenna pattern resonates at a specific position on the conductor can be determined, and an antenna device having a feed point adjusted to a desired frequency can be manufactured with good reproducibility. Therefore, an antenna device that can efficiently transmit and receive radio waves by resonating at a desired frequency can be manufactured with high yield and high reliability. INDUSTRIAL APPLICABILITY The present invention is extremely suitable for being applied to a chip antenna device built in a mobile phone for transmitting and receiving radio waves.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration example of a chip antenna device 100 according to the present invention.

FIG. 2 is a perspective view showing a configuration example of an antenna manufacturing apparatus 200 according to the present invention.

FIG. 3 is a block diagram illustrating a configuration example of an antenna manufacturing apparatus 200.

FIG. 4 is a process drawing showing a method (part 1) for manufacturing the chip antenna device 100.

FIG. 5 is a process chart showing a method (part 2) for manufacturing the chip antenna device 100.

6A and 6B are chip antenna devices 9 according to a conventional example.
It is the top view and X1-X2 arrow sectional drawing which show the structural example of No. 0.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 3 Conductor 5 Electrode 52 Drill blade 54 Power supply device 56 Voltage measuring device 100 Chip antenna device 200 Antenna manufacturing device

Claims (7)

[Claims] 1. An antenna device for transmitting and receiving a radio wave, comprising: a base made of an insulating member having a predetermined shape; a conductor provided on the base having a predetermined antenna pattern shape; And an electrode provided by applying a measurement signal of a desired frequency to an arbitrary point on the conductor, and being pulled out from a position where the conductor resonates by the measurement signal. Antenna device. 2. The antenna according to claim 1, wherein the electrode has an opening formed in the conductor and the base at the position, and is drawn out of the position along a side wall of the opening. apparatus. 3. A method of manufacturing an antenna device for transmitting and receiving a radio wave, comprising: forming a conductor having a predetermined antenna pattern shape on a base made of a dielectric member; and having a desired frequency at an arbitrary point on the conductor. A method for manufacturing an antenna device, comprising: applying a measurement signal; searching for a position at which the conductor resonates according to the measurement signal; and forming an electrode by extracting from the specified position. 4. The method for manufacturing an antenna device according to claim 3, wherein an opening is formed in the conductor and the base at the specified position, and an electrode is formed along a side wall of the opening. . 5. An antenna manufacturing apparatus for manufacturing an antenna device having a conductor having a predetermined antenna pattern shape on a base made of an insulating member, wherein a measurement signal of a desired frequency is applied to an arbitrary point on the conductor. An antenna manufacturing apparatus comprising: a position search unit that searches for a position where the conductor is resonated according to the applied measurement signal. 6. The position searching means includes: a contact that contacts an arbitrary point on the conductor; and a signal generator that applies a measurement signal having a desired frequency to the contact and supplies power to the conductor. The antenna manufacturing apparatus according to claim 5, comprising: a device; and a signal measuring device provided between the contact and the signal generating device to measure the measurement signal. 7. The contact comprises a drill bit, and the drill bit forms an opening in the conductor and the base at the position based on the information on the position searched by the position searching means. The antenna manufacturing apparatus according to claim 5, wherein