JP2002100916A - Method for adjusting dielectric antenna and the dielectric antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for adjusting dielectric antenna with which a desired characteristic can be obtained easily, and to provide a small-sized dielectric antenna. SOLUTION: The dielectric antenna 10 is constituted by arranging conductors 12a-12h constituting an antenna element 12, which turns into an F-type antenna on the external surface of a dielectric substrate 11 and setting a first adjusting area 13 in the conductor 12a, so that the length of the conductor 12a between a terminal conductor 16 which becomes a feeding point and an earth terminal 15 may be adjusted and a second adjusting area 14 in the conductor 12h, so that the overall length of the antenna element 12 may be adjusted. When the conductor 12a is cut off in the first adjusting area 13, the feeding point impedance of the antenna 10 can be improved and the resonance frequency of the antenna 10 can be lowered, and when the conductor 12h is cut off in the second adjusting area 14, the resonance frequency of the antenna 10 can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting a dielectric antenna used in a portable telephone or a portable wireless communication device, and a dielectric antenna which can be easily adjusted.

[0002]

2. Description of the Related Art In recent years, with the spread of portable telephones and portable radio communication devices, reduction in size and weight has been required. Although miniaturization of various electronic components such as semiconductor integrated circuits is rapidly progressing, it is an antenna that hinders miniaturization of wireless communication devices. As is well known, an antenna is an entrance / exit of an electromagnetic wave, and if it does not resonate with a frequency to be used, the efficiency is extremely reduced. In the case of a normal dipole antenna, it is very difficult to reduce the size because it requires a length of １ ／ wavelength of the used frequency. For this reason, various devices for miniaturizing the antenna have been proposed.

[0003] For example, in the antenna disclosed in Japanese Patent Application Laid-Open No. 10-13135, the antenna element is folded so as to be substantially parallel along the longitudinal direction to reduce the size of the antenna and to reduce the frequency of the two antennas. It is configured to resonate with the band.

In the antenna disclosed in Japanese Patent Application Laid-Open No. 10-229304, an antenna element is formed on the surface of a dielectric substrate, so that the antenna can be further miniaturized and easily mounted on a circuit board. We are devised so that we can do it.

[0005]

However, there are many types of portable wireless communication devices, and the arrangement of the dielectric antenna in the device differs depending on the type.
For this reason, the characteristics of the mounted dielectric antenna, such as the feed point impedance and the resonance frequency, often change due to the influence of conductors and electronic components around the dielectric antenna. When the feed point impedance and the resonance frequency change in this way, it is necessary to provide an adjustment circuit outside the dielectric antenna or change the arrangement of the dielectric antenna. It was troublesome.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a method for adjusting a dielectric antenna which can easily obtain desired characteristics and a small-sized dielectric antenna.

[0007]

According to the present invention, there is provided a method for adjusting a dielectric antenna having an antenna element including a conductor provided on an outer surface of a dielectric substrate. The present invention proposes a method of adjusting a dielectric antenna in which at least one of a feed point impedance and a resonance frequency is adjusted by cutting off a part of a conductor in a predetermined region of the antenna element.

According to the method of adjusting the dielectric antenna, by cutting off a part of the conductor in a predetermined area of the antenna element, the total length of the antenna element or the position of the feeding point is changed, At least one of the feed point impedance and the resonance frequency is changed and adjusted to match the desired feed point impedance or the desired resonance frequency.

According to a second aspect of the present invention, in the method for adjusting a dielectric antenna according to the first aspect, the antenna element has one end in a longitudinal direction connected to a ground terminal and a predetermined position between the one end and the other end. Is an F-type antenna connected to a terminal serving as a feeding point, and cutting a conductor between the ground terminal and the feeding point terminal to form a conductor between the ground terminal and the feeding point terminal. We propose a method of adjusting the dielectric antenna to increase the feed point impedance by increasing the length.

According to the method of adjusting the dielectric antenna, the ground terminal and the feed point terminal are cut when a portion of the conductor constituting the element of the F-type antenna is cut between the ground terminal and the feed point terminal. And the length of the conductor between them increases. This increases the feed point impedance.

According to a third aspect of the present invention, in the method for adjusting a dielectric antenna according to the first aspect, the antenna element has one end in a longitudinal direction connected to a ground terminal and a predetermined position between the one end and the other end. Is an F-type antenna connected to a terminal serving as a feeding point, and cutting a conductor between the ground terminal and the feeding point terminal to form a conductor between the ground terminal and the feeding point terminal. We propose a method of adjusting the dielectric antenna to lower the resonance frequency by increasing the length.

According to the method of adjusting the dielectric antenna, when the conductor constituting the element of the F-type antenna is cut between the ground terminal and the feed point terminal, the ground terminal and the feed point terminal are cut. And the length of the conductor between them increases. This lowers the resonance frequency of the antenna element.

According to a fourth aspect of the present invention, in the method for adjusting a dielectric antenna according to the first aspect, the antenna element has one end in a longitudinal direction connected to a terminal serving as a feeding point and another end serving as a tip of the element. A head capacity type antenna including a capacitance forming conductor having a predetermined area wider than other conductors, the head capacity type antenna being adjacent to a connection portion between the capacitance forming conductor and another conductor. We propose a method for adjusting a dielectric antenna that lowers the resonance frequency by forming a notch in a conductor for forming a capacitance.

According to the method for adjusting the dielectric antenna, the notch is formed in the conductor for forming a capacitance adjacent to a connection portion between the conductor for forming a capacitance and another conductor. Is increased, thereby lowering the resonance frequency.

According to a fifth aspect of the present invention, in the method for adjusting a dielectric antenna according to the first aspect, the antenna element has one end in the longitudinal direction connected to a terminal serving as a feeding point and the other end serving as a tip of the element. A head capacity type antenna including a capacitance forming conductor having a predetermined area wider than other conductors, and a tip of the capacitance forming conductor corresponding to a tip of the antenna element We propose a method of adjusting the dielectric antenna to increase the resonance frequency by removing the part.

According to the method of adjusting the dielectric antenna, the tip of the capacitance forming conductor corresponding to the tip of the antenna element is cut off to shorten the entire length of the antenna element. The resonance frequency of the antenna element is reduced.

According to a sixth aspect of the present invention, in the dielectric antenna provided with the antenna element including the conductor provided on the outer surface of the dielectric substrate, the predetermined region of the antenna element may be one of the conductors in the region. The present invention proposes a dielectric antenna set as an adjustment region for changing at least one of a feed point impedance and a resonance frequency by removing a portion.

According to the dielectric antenna, by cutting off a part of the conductor in the adjustment region of the antenna element, the total length of the antenna element is changed or the position of the feeding point is changed. As a result, at least one of the feed point impedance and the resonance frequency is changed and can be adjusted to match the desired feed point impedance or the desired resonance frequency.

According to a seventh aspect of the present invention, in the dielectric antenna according to the sixth aspect, a conductor constituting one antenna element is provided on both the front surface and the back surface of the dielectric substrate. Suggest an antenna.

According to the dielectric antenna, the conductor constituting one antenna element is provided on the front and back surfaces of the dielectric substrate. Thereby, the space for arranging the conductors constituting the antenna element is twice as large as that when the conductor is arranged only on the surface, and the shape of the dielectric substrate can be made smaller than when the conductor is arranged only on the surface.

According to an eighth aspect of the present invention, in the dielectric antenna according to the seventh aspect, the conductor provided on the front surface of the dielectric substrate and the conductor provided on the back surface are connected via a via hole. The proposed dielectric antenna is proposed.

According to the dielectric antenna, the conductor provided on the front surface of the dielectric substrate and the conductor provided on the back surface are connected via the via hole.

According to a ninth aspect of the present invention, in the dielectric antenna according to the seventh aspect, the distance between the conductor provided on the front surface of the dielectric substrate and the conductor provided on the back surface is the dielectric material. A dielectric antenna connected via a conductor provided on a side surface of a substrate is proposed.

According to the dielectric antenna, between the conductor provided on the front surface of the dielectric substrate and the conductor provided on the back surface thereof, via the conductor provided on the side surface of the dielectric substrate. Connected. Therefore, it is not necessary to form a via hole for connecting a conductor.

According to a tenth aspect of the present invention, in the dielectric antenna according to the sixth aspect, the dielectric substrate is formed of a laminate, and the dielectric substrate is formed of a conductor provided on the front surface and a conductor provided on the back surface. The present invention proposes a dielectric antenna in which a conductor connected between the conductors and constituting the antenna element is embedded in the laminate.

According to the dielectric antenna, the conductor provided on the front surface and the conductor provided on the back surface are connected via the conductor buried inside the laminate,
These conductors form an antenna element.

According to the eleventh aspect, in the dielectric antenna according to the sixth aspect, the antenna element has one end in a longitudinal direction connected to a ground terminal, and a predetermined position between the one end and the other end is a feeding point. We propose a dielectric antenna that is an F-type antenna connected to a terminal that becomes.

According to the dielectric antenna, for example, the F
A predetermined portion of the conductor between the ground terminal and the feeding point terminal of the type antenna or a predetermined region of the other end of the antenna element is set as an adjustment region. Thus, when the conductor in the adjustment region between the ground terminal and the feed point terminal is cut, the length of the conductor between the ground terminal and the feed point terminal increases, and the feed point impedance increases. It is increased and the resonance frequency is reduced.

According to a twelfth aspect of the present invention, in the dielectric antenna according to the sixth aspect, the antenna element has one end in a longitudinal direction connected to a terminal serving as a feeding point, and the other end serving as a tip of the element has a capacitance. A dielectric antenna which is a head capacity type antenna having a conductor of a predetermined area for forming is proposed.

According to the dielectric antenna, if the adjustment region is set adjacent to a connection portion between the capacitance-forming conductor and another conductor, the capacitance-forming conductor is set in the adjustment region. A notch is formed in the antenna element to increase the overall length of the antenna element, thereby lowering the resonance frequency. Also, if the adjustment region is set at the tip of the antenna element, the tip of the capacitance forming conductor is adjusted in the adjustment region. The resonance frequency is increased by cutting off the portion to shorten the entire length of the antenna element.

According to a thirteenth aspect, in the dielectric antenna according to the sixth aspect, a first antenna element constituted by a conductor provided on a surface of the dielectric substrate and a back surface of the dielectric substrate are provided. A dielectric antenna comprising a second antenna element constituted by a provided conductor is proposed.

According to the dielectric antenna, the first antenna element is provided on the front surface of the dielectric substrate, and the second antenna element is provided on the back surface of the dielectric substrate. Both of the two antenna elements can be used. Furthermore, these first and second
By cutting off the conductor in each of the adjustment regions of the antenna element, it becomes possible to adjust the feed point impedance and the resonance frequency of both antenna elements.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view showing a dielectric antenna according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. In the figure, reference numeral 10 denotes a dielectric antenna, which is an insulating plate-like substrate (hereinafter, referred to as a dielectric ceramic material).
A conductor is provided on the outer surface of the substrate 11,
This conductor forms an F-type antenna. That is, conductors 12 a to 12 h constituting the antenna element 12 are provided on the upper surface of the substrate 11, and connection terminal conductors 15 and 16 are provided from one side surface to the lower surface of the substrate 11. The conductors 12a are other conductors 12b to 12h
It has a rectangular shape having a larger area than that of, and one end of one side is connected to the terminal conductor 15 via the conductor 12b, and the other end is connected to the terminal conductor 16 via the conductor 12c.

The conductor 12d is arranged so as to extend along the side surface on which the terminal conductors 15 and 16 are provided, and one end thereof is connected to the conductor 12a adjacent to the conductor 12c.

The conductors 12f and 12h, each having a slightly shorter length than the conductor 12d, are arranged substantially parallel to the conductor 12d at a predetermined interval. Further, the other end of the conductor 12d is connected to the conductor 12f via the conductor 12e.
And one end of the conductor 12f is connected to the other end of the conductor 12g.
Is connected to one end of the conductor 12h.

On the other hand, in the conductor 12a, the conductor 12a
A first adjustment region 13 is set from the edge to the center between the connection portion with the conductor b and the connection portion with the conductor 12c. The other end of the conductor 12 h corresponding to the tip of the antenna element 12 is set in the second adjustment area 14.

Although not shown, a dummy electrode may be provided on the lower surface of the substrate 11 so that it can be stably soldered and fixed when mounted on the parent circuit board. When no dummy electrode is provided, the fixing of the substrate 11 to the parent circuit substrate or the like may be stabilized by an adhesive or the like.

According to the dielectric antenna 10 having the above-described configuration, the conductors 12a to 12a constituting the antenna element 12 are formed.
12h is provided so as to be exposed on the outer surface of the substrate 11,
Since the adjustment areas 13 and 14 are provided at the predetermined portions,
The feed point impedance and the resonance frequency of the antenna element 12 can be easily adjusted.

That is, by cutting the conductor 12a from the edge toward the center in the first adjustment region 13, the terminal conductor (ground terminal) 15 shown in FIG.
The length L1 of the element between the terminal and the terminal conductor (feeding point) 16 can be easily increased. Also, the second adjustment area 1
In FIG. 4, by cutting off the tip of the conductor 12h, the length L2 from the terminal conductor (feed point) 16 shown in FIG. 2 to the tip of the element can be easily reduced according to the length of the cut.

Therefore, by cutting off the conductor 12a in the first adjustment region 13, the impedance of the feeding point can be increased and the resonance frequency can be reduced. Further, by removing the conductor 12h in the second adjustment region 14, the resonance frequency can be increased.

For example, when the dielectric antenna 10 exhibits frequency / reflection loss characteristics as shown in S 1 of FIG. 3 when mounted on an electronic device, the conductor 12 a is cut off in the first adjustment region 13. It can be easily adjusted so as to obtain a frequency / return loss characteristic that resonates at a desired frequency f0 as in S2. Here, the feed point impedance changes depending on the ratio of the feed point connection position to the entire length of the antenna element 12, that is, the ratio L1 / L2. Therefore, when both the feed point impedance and the resonance frequency are simultaneously set to desired values, the first Adjustment area 13 and second
It is preferable to make adjustments using both of the adjustment regions 14.

In the dielectric antenna 10, the antenna element 12 is formed by a conductor arranged in a meandering manner.
With this configuration, the area of the substrate 11 can be minimized, so that the external shape can be reduced.

Next, a second embodiment of the present invention will be described.

FIG. 4 is an external perspective view showing the dielectric antenna of the second embodiment, FIG. 5 is a plan view seen from above in FIG. 4, and FIG. 6 is a plan view seen from below in FIG.

In the drawing, reference numeral 20 denotes a dielectric antenna, which is provided with a conductor on the outer surface of an insulating flat substrate (hereinafter simply referred to as a substrate) 21 made of a dielectric ceramic material. Type head capacity type antenna is formed. That is, the conductors 22 a to 22 forming the antenna element 22 are formed on the upper surface of the substrate 21.
f, 22i are provided, and a conductor 22h is provided on the lower surface.

The conductor 22a is composed of other conductors 22b to 22h
It has a rectangular shape having a larger area than that of, and one end of one side is connected to one end of the conductor 22c via the conductor 22b. The conductor 22c has a band shape and is arranged at a predetermined distance from the conductor 22a in parallel with the long side of the conductor 22a. Further, a strip-shaped conductor 22e is arranged at a predetermined interval in parallel with the conductor 22c, and the other end of the conductor 22c is connected to the other end of the conductor 22e via a conductor 22d.

One end of a conductor 22f is connected to one end of the conductor 22e so as to intersect at a substantially right angle. Conductor 2
The other end of 2f reaches the edge of the substrate 21 and is connected to one end of a strip-shaped conductor 22h provided on the lower surface of the substrate 21 via a conductor 22g provided on a side surface of the substrate 21. The conductor 22h is arranged so as to overlap with the conductor 22f in parallel, and the other end is connected to a terminal conductor (ground terminal) 25 provided on a side surface of the substrate 21.

A predetermined portion near one end of the conductor 22e is connected via a conductor 22i to a terminal conductor (feed point) 26 provided from the side surface to the lower surface of the substrate 21.

On the other hand, in the conductor 22a, the conductor 22
A first adjustment region 23 is set in the vicinity of the connection with the conductor b, from the edge of the conductor 22a to the center. By removing the conductor 22a in the first adjustment region 23, the rectangular conductor 22a changes into a U-shape. further,
On the conductor 22a, a second adjustment region 24 is set at an edge opposite to the first adjustment region 23.

Although not shown, a dummy electrode may be provided on the lower surface of the substrate 21 so that it can be stably soldered and fixed when mounted on the parent circuit board. When no dummy electrode is provided, the fixing of the substrate 21 to the parent circuit substrate or the like may be stabilized by an adhesive or the like.

According to the dielectric antenna 20 having the above-described structure, the conductors 22a to 22a constituting the antenna element 22 are formed.
22i is provided so as to be exposed on the outer surface of the substrate 21;
Since the adjustment regions 23 and 24 are provided at the predetermined portions,
The resonance frequency of the antenna element 22 can be easily adjusted.

That is, by cutting off the conductor 22a from the edge toward the center in the first adjustment region 23, the shape of the conductor 22a becomes U-shaped, and the length of the antenna element is changed according to the length of the cut. Can be increased, so that the resonance frequency can be easily reduced. Also, by cutting off the edge of the conductor 22a in the second adjustment region 24, the length of the antenna element can be shortened according to the length of the cut, so that the resonance frequency can be easily raised. .

In the dielectric antenna 20, the substrate 21
Since the antenna element 22 is formed by a conductor arranged to meander from the upper surface to the lower surface of the substrate 21, the area of the substrate 21 can be minimized, and the external shape can be reduced.

Next, a third embodiment of the present invention will be described.

FIG. 7 is an external perspective view showing the dielectric antenna of the third embodiment, FIG. 8 is a plan view seen from above in FIG. 7, and FIG. 9 is a plan view seen from below in FIG.

In the figure, reference numeral 30 denotes a dielectric antenna, and a conductor is provided on the outer surface of an insulating flat substrate (hereinafter, simply referred to as a substrate) 31 made of a dielectric ceramic material. A city-type F-shaped antenna is formed. That is, the conductors 32 a and 32 constituting the antenna element 32 are provided on the upper surface of the substrate 31.
b, 32f, 32j to 32m are provided, and conductors 32d, 32h are provided on the lower surface.

The conductor 32a is composed of other conductors 32b to 32k
And a conductor 32d provided on the lower surface of the substrate 31 via a conductor 32b and a conductor 32c provided on a side surface of the substrate 31 at one end of one short side of the rectangle. Is connected to one end. The conductor 32d is formed on the side opposite to the side where the conductor 32a is located so as to form a predetermined acute angle with respect to the side surface of the substrate 31 on which the conductor 32c is provided.

The other end of the conductor 32d reaches the opposing substrate side edge, and is connected to the other end of the strip-shaped conductor 32f provided on the upper surface of the substrate 31 via the conductor 32e provided on the side surface of the substrate 31. Have been. The conductor 32f is disposed so as to intersect at a substantially right angle with the side surface of the substrate 31, and one end thereof is connected to the substrate 3 via a conductor 32g provided on the side surface of the substrate 31.
1 is connected to one end of a conductor 32h provided on the lower surface. The conductor 32h has a band shape and is arranged in parallel with the conductor 32d.

The other end of the conductor 32h reaches the opposing side edge of the substrate, and is connected to the other end of the strip-shaped conductor 32j provided on the upper surface of the substrate 31 via the conductor 32i provided on the side surface of the substrate 31. Have been. The conductor 32j is disposed so as to intersect at a substantially right angle with the side surface of the substrate 31, and one end thereof is connected to a terminal conductor 37 provided from the side surface to the lower surface of the opposite substrate 31. Further, near one end of the conductor 32j, the conductor 32l is connected to one end of one long side of a rectangular conductor 32l via a wide conductor 32k.

The conductor 32l is connected to a terminal conductor 38 provided from the side surface to the lower surface of the substrate 31 via a conductor 32m at the other end of one short side adjacent to the conductor 32k.

On the other hand, in the conductor 32a, the conductor 32a
A first adjustment region 33 is set from the edge to the central portion so as to extend parallel to the long side adjacent to the connection portion with b. By removing the conductor 32a in the first adjustment region 33, the rectangular conductor 32a changes to a U-shape. Further, a second adjustment region 34 is set on the opposite edge of the conductor 32 a opposite to the first adjustment region 33.

In the conductor 32k, the other half of the longer side of the conductor 32l, that is, the other end of the conductor 32k is the third end.
The adjustment area 35 is set. Furthermore, the conductor 32l
The fourth adjustment region 36 extends from the edge to the central portion so as to extend parallel to the long side adjacent to the connection portion with the conductor 32m.
Is set. By removing the conductor 321 in the fourth adjustment region 36, the rectangular conductor 321 changes into a U-shape.

Although not shown, a dummy electrode may be provided on the lower surface of the substrate 31 so that it can be stably soldered and fixed when mounted on the parent circuit board. When the dummy electrode is not provided, the fixing of the substrate 31 to the parent circuit substrate or the like may be stabilized by an adhesive or the like.

According to the dielectric antenna 30 having the above-described configuration, the conductors 32 a to 32 a forming the antenna element 32 are formed.
32i is provided so as to be exposed on the outer surface of the substrate 31,
Since the first to fourth adjustment regions 33 to 36 are provided at the predetermined portions, the impedance of the feeding point and the resonance frequency of the antenna element 32 can be easily adjusted.

That is, by cutting off the conductor 32a from the edge toward the center in the first adjustment region 33, the shape of the conductor 32a becomes U-shaped, and the length of the antenna element 32 is changed according to the length of the cut. Therefore, the resonance frequency of the antenna element 32 can be easily reduced. Further, by cutting off the edge of the conductor 32a in the second adjustment region 34, the length of the antenna element 32 can be shortened according to the length of the cut, so that the resonance frequency can be easily increased. it can.

Further, by cutting off the conductor 32k in the third adjustment region 35, the width of the conductor 32k is reduced, the length of the antenna element 32 is increased according to the length of the cut, and the terminal conductor (feeding power) is increased. Since the length of the conductor between the point 37 and the terminal conductor (ground terminal) 38 can be increased, the resonance frequency of the antenna element 32 can be easily reduced and the feed point impedance can be increased. In addition, by removing the conductor 321 from the edge toward the center in the fourth adjustment region 36, the distance between the terminal conductor (feed point) 37 and the terminal conductor (ground terminal) 38 depends on the length of the removal. Since the length of the conductor can be increased, the feeding point impedance can be easily increased.

In the dielectric antenna 30, the substrate 31
Since the antenna element 32 is formed by a conductor spirally arranged so as to surround the antenna, the area of the substrate 31 can be minimized, and the external shape can be reduced in size.

Next, a fourth embodiment of the present invention will be described.

FIG. 10 is an external perspective view showing a dielectric antenna according to the fourth embodiment, FIG. 11 is a plan view seen from above in FIG. 10, and FIG. 12 is a plan view seen from below in FIG.

In the figure, reference numeral 40 denotes a dielectric antenna, and a conductor is provided on the outer surface of an insulating flat substrate (hereinafter simply referred to as a substrate) 41 made of a dielectric ceramic material. A city type monopole antenna is formed. That is, on the upper surface of the substrate 41, the conductors 42a constituting the antenna element 42,
42b and 42c are provided, and a conductor 42e is provided on the lower surface.

The conductor 42a is connected to the other conductors 42b to 42e.
A rectangular shape having a larger area than that of the above, one end of one long side of which is a band-shaped conductor 42c via the conductor 42b.
Is connected to one end. The conductor 42c is the conductor 42a
Are arranged in parallel with the long side of the conductor 42a at a predetermined interval. The other end of the conductor 42c is connected to the other end of a strip-shaped conductor 42e provided on the lower surface of the substrate 41 via a conductor 42d provided on a side surface of the substrate 41. The conductor 42e is disposed so as to be parallel to the conductor 42c, and one end of the conductor 42e is connected to a terminal conductor 45 provided on the lower surface of the substrate 41.

On the other hand, in the conductor 42a, the conductor 42a
A first adjustment region 43 is set from the edge of the short side to the center so as to extend in parallel with the long side adjacent to the connection portion with b. By removing the conductor 42a in the first adjustment region 43, the rectangular conductor 42a changes to a U-shape. Further, the first adjustment region 4 is provided on the conductor 42a.
A second adjustment region 44 is set on the opposite edge facing 3.

Although not shown, a dummy electrode may be provided on the lower surface of the substrate 41 so that it can be stably fixed by soldering when mounted on the parent circuit board. When no dummy electrode is provided, the fixing of the substrate 41 to the parent circuit substrate or the like may be stabilized by an adhesive or the like.

According to the dielectric antenna 40 having the above-described structure, the conductors 42 a to 42 a forming the antenna element 42 are formed.
42e is provided so as to be exposed on the outer surface of the substrate 41,
Since the first and second adjustment regions 43 and 44 are provided in the predetermined portion, the resonance frequency of the antenna element 42 can be easily adjusted.

That is, by cutting off the conductor 42a from the edge toward the center in the first adjustment region 43, the shape of the conductor 42a becomes U-shaped, and the length of the antenna element 42 is adjusted according to the length of the cut. Therefore, the resonance frequency of the antenna element 42 can be easily reduced. Further, by cutting off the edge of the conductor 42a in the second adjustment region 44, the length of the antenna element 42 can be shortened according to the length of the cut, so that the resonance frequency can be easily increased. it can.

In the dielectric antenna 40, the substrate 41
Since the antenna element 42 is formed of a conductor that is arranged so as to meander from the upper surface to the lower surface of the substrate 41, the area of the substrate 41 can be minimized, so that the external shape can be reduced in size.

Next, a fifth embodiment of the present invention will be described.

FIG. 13 is an external perspective view showing the dielectric antenna of the fifth embodiment, FIG. 14 is a plan view seen from above in FIG. 13, and FIG. 15 is a plan view seen from below in FIG.

In the figure, reference numeral 50 denotes a dielectric antenna, which has a main body 51 in which insulating plate-like substrates (hereinafter simply referred to as substrates) 51a and 51b made of a dielectric ceramic material are laminated, and each of the substrates 51a and 51b A conductor is provided on the outer surface of the antenna, and a head capacity type monopole antenna 52 is formed by the conductor. That is, the conductor 52a constituting the antenna element 52 is provided on the upper surface of the substrate 51a stacked on the upper side. Also,
Conductors 52b and 52c constituting the antenna element 52 are provided on the upper surface of the substrate 51b laminated on the lower side,
A conductor 52d is provided on the lower surface of the substrate 51b.

The conductor 52a is composed of other conductors 52b to 52d.
Is formed in a rectangular shape having a larger area than that of the above, and one end of one long side of the rectangular shape is formed through a via hole 52e.
2bc is connected to one end. The other end of the conductor 52b is connected to one end of the conductor 52c. The conductor 52c is arranged parallel to the long side of the conductor 52a at a predetermined interval from the conductor 52a.

The other end of the conductor 52c is connected to a strip-shaped conductor 52 provided on the lower surface of the substrate 51b through a via hole 52f.
d is connected to the other end. The conductor 52d is the conductor 52
One end of the conductor 52d is connected to a terminal conductor 55 provided on the lower surface of the substrate 51b.

On the other hand, in the conductor 52a, a first adjustment region 53 is set from the edge of the short side to the center so as to extend parallel to the long side adjacent to the via hole 52e.
By removing the conductor 52a in the first adjustment region 53, the rectangular conductor 52a changes to a U-shape. Further, a second adjustment region 54 is set in the conductor 52 a at an edge opposite to the first adjustment region 53.

Although not shown, the lower board 51 is mounted so that it can be stably soldered and fixed when mounted on the parent circuit board.
A dummy electrode may be provided on the lower surface of b. When the dummy electrode is not provided, the fixing of the board 51b to the parent circuit board or the like may be stabilized by an adhesive or the like.

According to the dielectric antenna 50 having the above-described structure, the conductors 52 a to 52 a forming the antenna element 52 are formed.
52d is provided so as to be exposed on the outer surface of the main body 51, and first and second adjustment regions 53, 5 are provided at predetermined portions thereof.
4, the resonance frequency of the antenna element 52 can be easily adjusted.

That is, by cutting off the conductor 52a from the edge toward the center in the first adjustment region 53, the shape of the conductor 52a becomes U-shaped, and the length of the antenna element 52 is adjusted according to the length of the cut. Therefore, the resonance frequency of the antenna element 52 can be easily reduced. Also, by cutting off the edge of the conductor 52a in the second adjustment region 54, the length of the antenna element 52 can be shortened according to the length of the cut, so that the resonance frequency can be easily raised. it can.

In the dielectric antenna 50, the main body 51
The antenna element 5 is formed by a conductor arranged in a meandering manner including the conductor layered from the upper surface to the lower surface of the antenna element 5.
With the configuration 2, the area of the main body 51 can be minimized, so that the external shape can be reduced in size.

Next, a sixth embodiment of the present invention will be described.

FIG. 16 is an external perspective view showing the dielectric antenna according to the sixth embodiment, FIG. 17 is a plan view seen from above in FIG. 16, and FIG. 18 is a plan view seen from below in FIG. In the figure, 60 is a dielectric antenna,
Conductors are provided on the upper and lower surfaces of an insulating plate-like substrate (hereinafter, simply referred to as a substrate) 61 made of a dielectric ceramic material. Are formed.

That is, conductors 62 a to 62 h constituting the antenna element 62 are provided on the upper surface of the substrate 61.
Terminal conductor 6 for connection from one side surface to the lower surface of substrate 61
5, 66 are provided. The conductor 62a has a rectangular shape having a larger area than the other conductors 62b to 62h, and one end of one long side thereof is connected to the terminal conductor 65 via the conductor 62b and the other end is conductive. It is connected to the terminal conductor 66 via the body 62c.

The conductor 62d is arranged so as to extend along the side surface on which the terminal conductors 65 and 66 are provided, and one end thereof is connected to the conductor 62a adjacent to the conductor 62c.

The conductors 62f and 62h, each having a slightly shorter length than the conductor 62d, are arranged substantially parallel to the conductor 62d at a predetermined interval. Further, the other end of the conductor 62d is connected to the conductor 62f via the conductor 62e.
Of the conductor 62f is connected to the other end of the conductor 62g.
Is connected to one end of the conductor 62h.

On the lower surface of the substrate 61, conductors 72a to 67h constituting the antenna element 72 are provided.
Terminal conductor 7 for connection from one side surface to the upper surface of substrate 61
5, 76 are provided. The conductor 72a has a rectangular shape having a larger area than the other conductors 72b to 72h, and is disposed on the tip side of the antenna element 62. One end of one long side of the conductor 72a is a conductor 72b
And the other end is connected to the terminal conductor 76 via the conductor 72c.

The conductor 72d is arranged so as to extend along the side surface on which the terminal conductors 75 and 76 are provided, and one end thereof is connected to the conductor 72a adjacent to the conductor 72c.

The conductors 72f and 72h, each having a length slightly shorter than the conductor 72d, are arranged substantially parallel to the conductor 72d at a predetermined interval. Further, the other end of the conductor 72d is connected to the conductor 72f via the conductor 72e.
Of the conductor 72f is connected to the other end of the conductor 72g.
Is connected to one end of the conductor 72h.

Incidentally, the fixing may be stabilized by an adhesive or the like at the time of mounting on a parent circuit board or the like.

According to the dielectric antenna 60 having the above-described configuration, the conductor 6 forming the antenna elements 62 and 72
2a to 62h and 72a to 72h are provided so as to be exposed on the outer surface of the substrate 61, and the antenna elements 62 and 72
Adjustment regions 63, 64, 7
3, 74, the antenna elements 62,
The impedance and the resonance frequency of the feed point 72 can be easily adjusted.

That is, by cutting off the conductor 62a from the edge toward the center in the first adjustment region 63, the distance between the terminal conductor (ground terminal) 65 and the terminal conductor (feeding point) 66 depends on the length of the cut. Of the antenna element 62 can be easily increased, the feed point impedance of the antenna element 62 can be increased, and the resonance frequency can be reduced. Furthermore, by cutting off the tip of the conductor 62h in the second adjustment region 64, the length from the terminal conductor (feed point) 66 to the tip of the element can be easily reduced according to the length of the cut. , The resonance frequency of the antenna element 62 can be increased.

By cutting the conductor 72a from the edge toward the center in the third adjustment region 73, the distance between the terminal conductor (ground terminal) 75 and the terminal conductor (feeding point) 76 depends on the length of the cut. Of the antenna element 72 can be easily increased, the feed point impedance of the antenna element 72 can be increased, and the resonance frequency can be reduced. Furthermore, by cutting off the tip of the conductor 72h in the fourth adjustment region 74, the length from the terminal conductor (feed point) 76 to the tip of the element can be easily reduced according to the length of the cut. , The resonance frequency of the antenna element 72 can be increased.

In the dielectric antenna 60, the antenna element 6 is formed by a conductor arranged in a meandering manner.
With the configuration of 2, 72, the area of the substrate 61 can be minimized, so that the external shape can be reduced in size. Further, each of the front surface and the back surface of the
Since each antenna element 62, 72 is provided,
Two antenna elements 6 having different resonance frequencies from each other
2, 72 can be used with one dielectric antenna element.

The above embodiments are specific examples of the present invention, and the present invention is not limited to these embodiments.

Further, in addition to the above adjustment region, a corner portion of the antenna element may be set as an adjustment region. For example, in the above-described dielectric antenna 20 of the second embodiment, as shown in FIG.
Adjustment areas 81 to 84 may be provided at the corners of.
By cutting off the conductors in these adjustment regions 81 to 84, the antenna element 22 can be removed according to the length of the cut.
Can be increased, so that the resonance frequency can be easily reduced.

[0103]

As described above, according to the method for adjusting a dielectric antenna according to the first aspect of the present invention, a part of the conductor in a predetermined region of the antenna element is cut off, so that the antenna element is removed. Since the total length and the position of the feed point can be easily changed, the feed point impedance and the resonance frequency can be easily changed and adjusted to match the desired feed point impedance or the desired resonance frequency.

According to the method of adjusting a dielectric antenna according to the second aspect, in addition to the above-described effects, cutting is performed between the ground terminal and the feed point terminal of the conductor constituting the element of the F-type antenna. By increasing the length of the conductor between the ground terminal and the feed point terminal, the feed point impedance can be easily increased.

According to the method of adjusting a dielectric antenna according to the third aspect, in addition to the above-described effects, cutting is performed between the ground terminal and the feed point terminal of the conductor constituting the element of the F-type antenna. By increasing the length of the conductor between the ground terminal and the feed point terminal, the resonance frequency can be easily reduced.

According to the method of adjusting a dielectric antenna according to the fourth aspect, in addition to the above-described effects, in addition to the above-described effects, the capacitance is formed adjacent to the connection portion between the capacitance forming conductor and another conductor. By forming the cuts in the forming conductor, the total length of the antenna element can be easily increased, whereby the resonance frequency can be easily reduced.

According to the method of adjusting a dielectric antenna according to the fifth aspect, in addition to the above effects, the tip of the capacitance forming conductor corresponding to the tip of the antenna element is cut off. As a result, the overall length of the antenna element can be shortened, whereby the resonance frequency of the antenna element can be easily reduced.

According to the dielectric antenna of the sixth aspect, by cutting off a part of the conductor in the adjustment region of the antenna element, the entire length of the antenna element and the position of the feeding point can be easily changed. And the feed point impedance and the resonance frequency can be easily adjusted to desired values.

According to the dielectric antenna of the present invention, in addition to the above-described effects, the conductor constituting one antenna element is provided on the front surface and the back surface of the dielectric substrate. The arrangement space for the conductors constituting the antenna element is twice as large as when the conductor is arranged only on the surface, and the shape of the dielectric substrate can be made smaller than when the conductor is arranged only on the surface.

According to the dielectric antenna of the present invention, in addition to the above effects, a via hole is provided between the conductor provided on the front surface of the dielectric substrate and the conductor provided on the back surface. The connection can be made via the conductor, so that the conductor can be arranged relatively freely.

According to the dielectric antenna of the ninth aspect, in addition to the above effects, the dielectric antenna is provided between the conductor provided on the front surface of the dielectric substrate and the conductor provided on the back surface. Since the connection is made via the conductor provided on the side surface of the body substrate, it is not necessary to form a via hole for connecting the conductor, and the manufacturing process can be simplified.

According to the dielectric antenna of the tenth aspect, in addition to the above effects, a space between the conductor provided on the front surface and the conductor provided on the back surface is provided inside the laminate. Since the antenna elements are connected through the buried conductors and constitute the antenna element, the area of the dielectric substrate can be reduced.

According to the dielectric antenna of the eleventh aspect, in addition to the above effects, for example, a predetermined portion of the conductor between the ground terminal and the feed point terminal of the F-type antenna or the antenna element. If a predetermined area at the other end is set as an adjustment area, a conductor between the ground terminal and the power supply point terminal is cut by cutting a conductor in the adjustment area between the ground terminal and the power supply point terminal. Can be easily increased, the feed point impedance can be increased, or the resonance frequency can be reduced.

According to the dielectric antenna of the twelfth aspect, in addition to the above effects, if the adjustment area is set adjacent to the connection portion between the capacitance forming conductor and another conductor. The resonance frequency can be easily reduced by forming a cut in the conductor for forming a capacitance in the adjustment region to increase the total length of the antenna element, and set the adjustment region at the tip of the antenna element. Then, the resonance frequency can be easily increased by cutting off the tip of the conductor for forming the capacitance in the adjustment region and shortening the entire length of the antenna element.

According to the dielectric antenna of the thirteenth aspect, in addition to the above effects, both the first and second antenna elements provided on the front and back surfaces of the dielectric substrate can be used. By cutting off the conductors in the respective adjustment regions of the first and second antenna elements, it is possible to easily adjust the feed point impedance and the resonance frequency of both antenna elements.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a dielectric antenna according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a dielectric antenna according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of adjusting a dielectric antenna according to the first embodiment of the present invention.

FIG. 4 is an external perspective view showing a dielectric antenna according to a second embodiment of the present invention.

5 is a plan view of the dielectric antenna in FIG. 4 as viewed from above.

6 is a plan view of the dielectric antenna in FIG. 4 as viewed from below.

FIG. 7 is an external perspective view showing a dielectric antenna according to a third embodiment of the present invention.

8 is a plan view of the dielectric antenna in FIG. 7 as viewed from above.

9 is a plan view of the dielectric antenna in FIG. 7 as viewed from below.

FIG. 10 is an external perspective view showing a dielectric antenna according to a fourth embodiment of the present invention.

11 is a plan view of the dielectric antenna in FIG. 10 as viewed from above.

12 is a plan view of the dielectric antenna in FIG. 10 viewed from below.

FIG. 13 is an external perspective view showing a dielectric antenna according to a fifth embodiment of the present invention.

14 is a plan view of the dielectric antenna in FIG. 13 as viewed from above.

15 is a plan view of the dielectric antenna in FIG. 13 as viewed from below.

FIG. 16 is an external perspective view showing a dielectric antenna according to a sixth embodiment of the present invention.

17 is a plan view of the dielectric antenna in FIG. 16 as viewed from above.

18 is a plan view of the dielectric antenna in FIG. 16 as viewed from below.

FIG. 19 is a diagram illustrating another setting position of the adjustment area in the dielectric antenna according to the present invention.

[Explanation of symbols]

10, 20, 30, 40, 50, 60 ... dielectric antennas, 11, 21, 31, 41, 51a, 51b, 61 ...
Substrate, 12, 22, 32, 42, 52, 62, 72 ... antenna element, 12a to 12h, 22a to 22i,
32a to 32m, 42a to 42e, 52a to 52d, 6
2a to 62h, 72a to 72h ... conductors, 13, 14,
23, 24, 33, 34, 35, 36, 43, 44, 5
3, 54, 63, 64, 73, 74, 81 to 84 ... adjustment area, 15, 25, 38, 65, 75 ... terminal conductor (ground terminal), 16, 26, 37, 45, 55, 66, 76 ...
Terminal conductors (feed points), 51... Body, 52e, 52f.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshihiro Yasuda 6-16-20 Ueno, Taito-ku, Tokyo Within Taiyo Electric Power Co., Inc. (72) Inventor Takashi Amano 6-16-20 Ueno, Taito-ku, Tokyo Taiyo F-term in Induction Corporation (reference) 5J046 AA04 AA19 AB13 PA07

Claims (13)

[Claims] 1. A method for adjusting a dielectric antenna including an antenna element including a conductor provided on an outer surface of a dielectric substrate, wherein a part of the conductor in a predetermined region of the antenna element is cut off. And adjusting at least one of the feed point impedance and the resonance frequency. 2. The antenna element is an F-type antenna having one end in a longitudinal direction connected to a ground terminal and a predetermined position between the one end and the other end connected to a terminal serving as a feeding point. 2. A feed point impedance is increased by cutting a conductor between a terminal and the feed point terminal to increase a length of the conductor between the ground terminal and the feed point terminal. 3. The method for adjusting a dielectric antenna according to item 1. 3. The antenna element is an F-type antenna having one end in a longitudinal direction connected to a ground terminal and a predetermined position between the one end and the other end connected to a terminal serving as a feeding point. The resonance frequency is reduced by cutting a conductor between a terminal and the feed point terminal to increase a length of the conductor between the ground terminal and the feed point terminal. An adjustment method of the dielectric antenna according to the above. 4. An electric conductor for forming a capacitance having a predetermined area which is connected to a terminal at one end in a longitudinal direction of the antenna element and serves as a feed point, and has a wider area at the other end as a tip of the element than other conductors. A head capacity type antenna having a notch, and lowering a resonance frequency by forming a notch in the capacitance forming conductor adjacent to a connection portion between the capacitance forming conductor and another conductor. The method for adjusting a dielectric antenna according to claim 1, wherein: 5. A conductor for forming a capacitance having a predetermined area which is connected to a terminal at one end in a longitudinal direction of the antenna element as a feeding point and has a wider end at the other end as an element tip than other conductors. 2. A head capacity type antenna provided with: wherein a resonance frequency is increased by cutting off a tip end of the capacitance forming conductor corresponding to a tip end of the antenna element. An adjustment method of the dielectric antenna according to the above. 6. A dielectric antenna provided with an antenna element including a conductor provided on an outer surface of a dielectric substrate, wherein a predetermined region of the antenna element cuts off a part of the conductor in the region. A dielectric region set as an adjustment region for changing at least one of a feed point impedance and a resonance frequency. 7. The dielectric antenna according to claim 6, wherein a conductor constituting one antenna element is provided on both the front surface and the back surface of the dielectric substrate. 8. The dielectric according to claim 7, wherein a conductor provided on the front surface of the dielectric substrate and a conductor provided on the back surface are connected via a via hole. antenna. 9. A conductor provided on a front surface of the dielectric substrate and a conductor provided on a rear surface thereof are connected via a conductor provided on a side surface of the dielectric substrate. The dielectric antenna according to claim 7, wherein: 10. The dielectric substrate is formed of a laminate, and the conductor that is connected between the conductor provided on the front surface and the conductor provided on the back surface and forms the antenna element is formed by the laminate. The dielectric antenna according to claim 6, wherein the dielectric antenna is embedded inside a body. 11. The antenna element is an F-type antenna having one end in a longitudinal direction connected to a ground terminal and a predetermined position between the one end and the other end connected to a terminal serving as a feeding point. The dielectric antenna according to claim 6, wherein 12. A head capacity type antenna having one end in the longitudinal direction connected to a terminal serving as a feeding point and the other end serving as a tip of the element provided with a conductor having a predetermined area for forming a capacitance. The dielectric antenna according to claim 6, wherein the dielectric antenna is an antenna. 13. A semiconductor device comprising: a first antenna element constituted by a conductor provided on a front surface of the dielectric substrate; and a second antenna element constituted by a conductor provided on a back surface of the dielectric substrate. The dielectric antenna according to claim 6, wherein: