JP2002050918A - Chip antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chip antenna which can improve effective antenna gain and improve circuit quality by enabling transmission/reception of plural kinds of linearly polarized wave. SOLUTION: A chip antenna 1 is formed in a rectangular parallelepiped dielectric block 4. A first linear radiating element 6 is formed on one side (the upper surface) of the dielectric block 4. A second radiating element 5 is bent and connected to one end G of the radiating element 6 and on one side of the dielectric block 4. The dielectric block 4 has a ground conductor 2 on the other side (the bottom surface). A third radiating element 8 connects the ground conductor 2 and the other end C of the radiating element 6 approximately vertically to the ground conductor 2. The other side of the dielectric block 4 has a first electrode 3 for insulation from the ground conductor 2. A feeder line is connected between the electrode 3 and a point P of the radiating element 6. Elements 5 and 6 transmit/receive horizontally polarized waves, while the element 8 and an element 7 of the feeder line transmit/receive vertically polarized waves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a chip antenna formed on a dielectric block, and more particularly to a chip antenna capable of transmitting and receiving a plurality of types of linearly polarized radio waves.

[0002]

2. Description of the Related Art In recent years, with the spread of portable telephones and wireless LAN devices, needs for chip antennas that are small, lightweight, easily mountable, and do not require adjustment have been increasing. Originally, when emphasizing its radiation efficiency, gain performance, and bandwidth, an antenna needs to be as large as a wavelength or more. In addition, when mounting on mobile phones and wireless LAN devices, it is necessary to maintain the unique shape of the antenna due to size restrictions, and in order to suppress the influence of the surrounding environment, design including the plastic thickness of the cover part In some cases, it may be necessary to arrange the conductor or carelessly arrange a conductor such as a metal in the vicinity.

[0003] However, recently, a digital communication system, such as CDMA and OFDM communication, including various fadings and capable of excellent communication even in a multipath environment having various interference waves has come into practical use. Is coming. Accordingly, the antenna maintains the size corresponding to the wavelength, and accepts the restrictions of various antennas as described above, and
There is no need to design an N device or the like, and an antenna that is small, lightweight, and can be easily mounted has been required even if the efficiency and the gain are somewhat poor. In response to such a trend, a helical or spiral type chip antenna formed on a dielectric block has been disclosed in Japanese Patent Laid-Open No. 9-326624.
And Japanese Patent Application Laid-Open No. 2000-13132. These chip antennas generate linearly polarized waves having an electric field component mainly in the direction of the helical axis.

[0004]

In the above-mentioned portable telephones and wireless LAN devices, for example, it is assumed that communication is performed with vertically polarized waves, but in an actual wireless communication line in a multipath environment, orthogonal horizontal lines are used. Polarization also occurs. This is because, when talking with a mobile phone, the phone is tilted so that the antenna is arranged obliquely, and in fact a mixed component of vertical and horizontal polarization is radiated. For this reason, it is clear from an example in which the antenna is installed at a slight angle or an example in which the polarization is rotated in the course of multiple propagation. As described above, the single linearly polarized antenna has a disadvantage that the line quality is likely to be degraded due to the polarization mismatch during actual use.

Accordingly, the present invention solves the above-mentioned drawbacks of the prior art chip antenna, improves the effective antenna gain by enabling transmission and reception of a plurality of types of linearly polarized radio waves,
An object of the present invention is to provide a chip antenna capable of improving line quality.

[0006]

According to the present invention, there is provided a chip antenna formed on a dielectric block including a substantially rectangular parallelepiped outer surface, wherein the first linear radiating element provided on one surface of the dielectric block is provided. And a second radiating element bent and connected to one end of the first radiating element and one surface of the dielectric block;
A ground conductor provided on the other surface of the dielectric block, a third radiating element connecting the ground conductor and the other end of the first radiating element in a direction substantially perpendicular to the ground conductor, A first electrode provided on the other surface of the dielectric block so as to be insulated from a conductor, and a power supply line connected between the electrode and a predetermined position of the first radiating element. Features.

[0007] The first of the chip antennas can have a configuration in which the second radiating element is bent substantially at right angles to the first radiating element.

[0008] The second of the chip antennas can be configured such that the total length of the first radiating element and the second radiating element is approximately 波長 wavelength at the operating frequency.

A third aspect of the chip antenna can have a configuration in which the ground conductor is replaced with a side surface of the dielectric block.

[0010] A fourth aspect of the chip antenna is that the feeder line has a first portion perpendicular to the electrode and a first portion parallel to the ground conductor having one end connected to the tip of the first portion. It has a configuration including a second portion and a third portion having one end connected to a predetermined position of the first radiating element and the other end perpendicular to the ground conductor connected to the other end of the second portion. be able to.

A fifth aspect of the chip antenna is that the dielectric block is formed by laminating a plurality of dielectric plates, and the first and second radiating elements, the ground conductor, and the feeder line. The two portions are formed of conductor patterns provided on the different dielectric plates, and the third radiating element, the first portion of the feed line, and the third portion of the feed line pass through the dielectric material. A configuration formed by via holes penetrating the plate can be adopted.

[0012] The chip antenna may have a configuration in which the first radiating element is formed on a dielectric plate stacked inside the dielectric block instead of one surface of the dielectric block.

In a sixth aspect of the chip antenna, the radiating elements including the first radiating element may be connected in various shapes and angles after a connection point with the third portion of the feeder line. Further, a composite structure with each of the third to fifth embodiments of the chip antenna can be obtained.

[0014] A seventh of the chip antenna has a portion facing upward from the side surface of the dielectric block, and each of the third to sixth of the chip antenna has at least one monopole connected to the ground conductor. And a composite structure can be obtained.

[0015]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of a chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 2 is an exploded perspective view of a conductor portion of the chip antenna according to the embodiment of FIG. (A) is a back front view,
(B) is a left side view, (c) is a top view, (d) is a right side view, (e) is a front view, and (f) is a bottom view. FIG. 3 is an exploded perspective view for explaining a manufacturing process of the chip antenna according to the embodiment of FIG.

First, the configuration of the chip antenna 1 will be described with reference to FIG. The chip antenna 1 is formed on a dielectric block 4 which is a dielectric having a substantially rectangular parallelepiped outer surface. On the upper surface of the dielectric block 4, that is, on one surface, a straight line that is a radiating element, and a straight line that is connected to one end G of the element 6 by being bent at a predetermined angle, here a substantially right angle, to one end G of the element 6. And an electrically conductive element 5 are provided. The ground conductor 2, which is a conductor, is formed on the bottom surface of the dielectric block 4, that is, on almost the entire other surface. However, near the end of one side of the bottom surface of the dielectric block 4, it is electrically isolated from the ground conductor 2.
An insulated conductor electrode 3 is provided. Inside the dielectric block 4, there is provided an element 8, which is a conductor-forming radiating element, connected to the other end C of the element 6 and connected to the point A of the ground conductor 2 almost perpendicularly. In addition, between the point B of the electrode 3 and the point P of the element 6, a feed line (the first feed line of the feed line) vertically raised from the electrode 3.
Part) 11, a point D of a power supply line (second part of the power supply line) 10 and an E point of a power supply line (third part of the power supply line) 9 wired horizontally from the tip D of the power supply line 11 to the ground conductor 2. A power supply line for a high-frequency signal, which is vertically raised from the front end F of the power supply line 9 and sequentially connected to a point P at a predetermined intermediate position of the element 6, is disposed.

The coordinate system 99 composed of three axes of X, Y and Z shown in FIG. 1 is used to form the bottom surface or the elements 5 and 6 whose XY plane is the surface of the ground conductor 2 of the dielectric block 4. Corresponds to the upper surface. Further, the developed view of FIG. 2 shows the elements 5 to 8 formed of the conductor shown in FIG.
The positions and connection relationships between the power supply lines 9 to 11, the ground conductor 2, and the electrode 3 are made clearer.

Next, the electrical characteristics of the chip antenna of FIG. 1 will be described. In the chip antenna 1 shown in FIG. 1, power is supplied to the radiating elements 5, 6, and 7 by applying a high-frequency signal between the electrode 3 and the ground conductor 2. If the ground conductor 2 is an earth side electrode, the electrode 3
Is supplied from the feed line 11 to the point P of the element 7 via the feed line 10 and the feed line 9. Although the element 7 is generally handled as a feed line, it also operates as a radiating element.

If the free space wavelength of the high frequency signal used in the chip antenna 1 is λo and the wavelength in the dielectric block 4 is λg, the wavelength of the high frequency signal in the elements 5 and 6 is between λo and λg. become. Now, it is preferable that the sum of the lengths of the elements 5 and 6 is (の) the wavelength of the used frequency, and it is preferable that the sum be approximately in the range of λg / 4 to λo / 4. The high-frequency signal fed to the point P of the element 7 is distributed as a standing wave on the elements 5, 6, and 8, and is radiated into space. The current distribution of the standing wave is, for example, when the sum of the lengths of the element 5 and the element 6 is about λg / 4, the current distributions of the element 5 and the element 6 become current distributions 101 and 102, respectively.

In this state, when the surface of the earth conductor 2 is made parallel to the earth's surface, the elements 5 and 6 transmit and receive radio waves having horizontal polarization and orthogonal directivity. In other words, the element 5 emits a linearly polarized wave in the Y direction component of the coordinate 99 (the directivity is in the Y direction), and the element 6 emits a linearly polarized wave in the X direction component of the coordinate 99 (the directivity is in the X direction). Will be. Therefore, when it is desired to increase the amount of linear polarization of the X-direction component, the length of the element 6 may be made longer than that of the element 5. However, the tip H of the element 5 is
It is necessary to pay attention that the current at the tip H becomes zero because it is open (open). That is, even if the element 5 and the element 6 have the same length, the integrated value of the current distribution is larger in the element 6. Since the amount of radio wave radiation is proportional to this integral value, when the elements 5 and 6 have the same length, the radiated power (X component) of the polarized waves from the element 6 is larger. This must be taken into account when adjusting the lengths of the elements 5 and 6. Here, when the surface of the earth conductor 2 is perpendicular to the earth surface where the surface in front of the paper surface is the ground, the polarization of the transmitted and received radio waves changes by 90 degrees, the element 5 is the vertical polarization of the Y-direction component, and the element 6 is the Radio waves having the directivity of the horizontal polarization of the X-direction component are orthogonal to each other.

The element 8 which is a radiating element
Is oriented perpendicular to the plane of the ground conductor 2,
When the surface of the ground conductor 2 is parallel to the earth's surface, vertically polarized radio waves are transmitted and received. Similarly to the element 8, the element 7, which is generally considered as a part of the feeder line, transmits and receives vertically polarized radio waves when the surface of the ground conductor 2 is parallel to the earth surface.

The connection point P between the element 6 and the element 7 selects a place where the input impedance to the element 6 becomes optimum according to the current distribution on the element 6. In the current distribution 102 shown in FIG. 1, the matching is improved when the impedance of the element 7 is increased as the connection point P with the element 7 is closer to the G point. The impedance of the element 7 at the point P is often set to about 50Ω.

Next, an example of a manufacturing process of the chip antenna 1 shown in FIG. 1 will be described with reference to FIG.

The dielectric block 4 shown in FIG. 1 is constructed by laminating a plurality of (six) dielectric plates 41 to 46 in FIG. The elements 5 and 6 formed on the upper surface of the dielectric block 4 correspond to the uppermost dielectric plate 4 in FIG.
1. Element 5 to dielectric plate 41
The molding of (6) and (6) may be performed, for example, by etching a dielectric plate 41 on which a copper foil is stuck while leaving the elements 5 and 6. Feeding line 9 formed on fourth dielectric plate 44 from the top
And 10 can apply the same manufacturing method. The ground conductor 2 and the electrode 3 can be attached to the other surface (bottom surface) of the lowermost dielectric plate 46 with an adhesive. The dielectric block 4
Alternatively, the dielectric plates 41 to 46 include Teflon (registered trademark),
Alumina, denatured BT, PPO, PC, aluminum oxide, barium oxide, porcelain such as silica, glass, a single material of glass or plastic, or a mixed material thereof can be used.

The element 7 is a conductor arranged inside a through-hole formed in the dielectric plates 41 to 43.
The connection between the conductor and the feed line 9 is made by the dielectric plates 41 to 43
Then, the conductor is attached to through-holes formed in the dielectric plates 41 to 43 so that the P point of the element 7 and the conductive pattern on the dielectric plate 44 are supplied. Via hole connection is made with the point F of the electric wire 9. Similarly, the element 8 is constituted and connected by a conductor disposed inside the through-holes of the dielectric plates 41 to 46, and
Via hole connection. The point C of the feed line 11 is similarly configured and connected by a conductor disposed inside the through-holes of the dielectric plates 44 to 46, and is connected to the point B of the electrode 3 via hole. The power supply line 10 is connected to the dielectric plate 4
4 is composed of a conductor pattern on
Is connected to the upper end point D of the feeder line 11 via hole connection.

The chip antenna 1 is formed by forming elements 5 and 6, which are internal conductors of the dielectric block 4, and feed lines 9 and 10 on a plurality of different green sheets, respectively, and then laminating and firing the green sheets. ,
The method of manufacturing via holes or the like is disclosed in
No. 0-13132 and the like.

Here, the elements 5 and 6 shown in FIG. 1 and FIG. 3 are not limited to the upper surface of the dielectric block 4, but will be described with reference to FIG.
2 may be formed on a plane or the like. Forming the elements 5 and 6 inside the dielectric block 4 has the effect of reducing the length of the elements 5 and 6 at the same frequency. In addition, there is an effect that the elements 5 and 6, which are conductors, can reduce abrasion and breakage due to contact with an external object.

The ground conductor 2 arranged on the bottom surface of the dielectric block 4 in FIG. 1 can be replaced with a side surface of the dielectric block 4. However, when the ground conductor 2 is replaced by the front side surface of the dielectric block 4, when the ground conductor 2 is perpendicular to the earth surface, the elements 5 and 6 transmit and receive horizontally polarized radio waves whose directivity is orthogonal to each other. On the other hand, when the surface of the ground conductor 2 is horizontal to the earth's surface, the element 5 transmits and receives a vertically polarized wave, the element 6 transmits and receives a horizontally polarized wave, and radio waves having directivity orthogonal to each other.

FIG. 4 is a perspective view showing a second embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. (A) is an overall view and (b) is a partially enlarged view.

The chip antenna 1A shown in FIG.
The feeder line 9 and feeder line 10 of the chip antenna 1 shown in FIG. 1 are changed to a strip-shaped conductor pattern having a desired width. The power supply lines 9 and 10 are formed as a conductor pattern having a width facing the ground conductor 2 so as to operate as a microstrip line having a desired impedance with the ground conductor 2. As generally mentioned with reference to FIG. 1, generally, the feeder line composed of feeder lines 9, 10, and 11 is configured such that the characteristic impedance at point P is 50Ω and matching with element 6. Often take. In the example of FIG. 4, the length of the feed lines 11 is ignored so that the length of the feed lines 11 can be shortened, and the width of the feed lines 9 and 10 is determined so that the characteristic impedance of the feed lines 9 and 10 operating as microstrip lines becomes 50Ω. In addition, the length of the element 7 and the position of the connection point P to the element 6 are adjusted so that the feeding line 7 and the element 6 are often aligned. As another method of impedance matching between the element 6 (radiating element) and the element 7 (feeding line), the feeding lines 9 and 1 are used.
By changing the width of 0, the characteristic impedance of the microstrip line
Element 7 is properly selected as a stub for matching.
A method of matching the impedance at the connection point P between the element and the element 6 is also effective. The transmission and reception radio waves of the chip antenna shown in FIG. 4 are the same as those in FIG.

FIG. 5 is a perspective view showing a third embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through.

The chip antenna 1B shown in FIG.
The electrode 31 is added to the chip antenna 1 shown in FIG.
The electrode 31 formed of a conductor is arranged on the side surface near the electrode 3 arranged on the bottom surface of the dielectric block 4 and connected to the electrode 3. The lower surface portion of the electrode 31 and the portion near the side surface of the electrode 3 are connected by contact or the like, and both are electrically connected. The electrode 31 is connected to the electrode 31 by soldering when the chip antenna 1B is mounted on a device to be used and it is difficult to connect to another device circuit only with the electrode 3 on the lower surface of the dielectric block 4. It is considered so that it can be done. The electrode 31 and the electrode 3
May be provided in an appropriate size to adjust the input impedance to the feeder line 11, that is, to use it as an impedance matching element (impedance stub) at point P of the element 6. Therefore, as the shape of the electrode 31, not only a rectangle as shown in FIG. 5, but also various shapes such as a triangle, an ellipse, a polygon, a thin line, a polygonal line, and the like can be used.
Note that the transmission and reception radio waves of the chip antenna shown in FIG. 5 are the same as those in FIG.

FIG. 6 is a perspective view showing a fourth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through.

The chip antenna 1C shown in FIG.
The four monopoles 12 (1
2A to 12D) are added. Each of the conductive monopoles 12A to 12D is a rod-shaped, linear, or not-wide band-shaped object whose one end is disposed at each of the four corners of the ground conductor 2. The lower ends of the monopoles 12A to 12D are connected to the ground conductor 2, respectively. Monopole 1
The length of each of 2A to 12D is generally selected in the range of λg / 4 to λo / 4, where λo is the free space wavelength and λg is the wavelength inside (inside) the dielectric block 4. That is, the wavelength is selected to be approximately １ ／ wavelength of the used frequency. The monopole 12 may be disposed so as to surround the side surface of the dielectric block 4, that is, on the side of the ground conductor 2, and may be one or several tens.

In the chip antenna 1C shown in FIG. 6, the monopole 12 radiates an electric field component in the Z direction of the coordinate system 99 shown in FIG.
There is an effect of improving the radiation efficiency of C itself. In a general use state, the ground conductor 2 of the chip antenna 1C is connected to a printed circuit board to be mounted or an earth electrode of the apparatus. However, it is only necessary that the ground conductors 2 be uniformly connected as a whole. However, in a case where the ground conductors 2 are connected by a print pattern or the like that is thin with respect to the wavelength, the grounding of the printed circuit board mounted on the ground conductors 2 is performed. There is a possibility that high-frequency signals may be lost in this portion, or radiation may occur from a portion where radio waves should not be radiated.

However, as shown in FIG.
2A to 12D), a standing wave like a current distribution 201 is superimposed on the monopole 12. For this reason, the current that should originally flow to the outside is effectively radiated from the monopole 12 as an electric field component in the Z direction (that is, as a vertically polarized wave when the ground conductor 2 is arranged parallel to the earth plane). Will be. Further, as can be seen from the current distribution 201, the current at the connection point with the ground conductor 2 below the monopole 12 is maximum, indicating that the potential at this portion is zero or close to it. . Therefore, since the potential of the ground conductor 2 near the root where the monopole 12 is disposed is zero or a small value, the outflow of current to the outside is suppressed, and the efficiency of the chip antenna 1C is improved. become.

FIG. 7 is a perspective view showing a fifth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 8 is a perspective view showing a sixth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. The chip antenna 1D shown in FIG. 7 and the chip antenna 1E shown in FIG.
This is an example in which the shapes of C monopoles 12 (12A to 12D) are respectively modified.

In the chip antenna 1D shown in FIG. 7, the monopoles 13 (13A to 13D) arranged on the side surfaces (front and back and front) of the dielectric block 4 are
After being set up in the vertical direction with respect to the ground conductor 2, the middle part to the tip part is in a horizontal direction with respect to the ground conductor 2. The length of the inverted L-shaped monopole 13 is also
As in the case of the monopole 12 shown in FIG. 6, the length of the operating frequency with respect to the wavelength is selected to be approximately 1/4 wavelength. Monopo
1 has an electric field of the Z component and an electric field of the X component in the coordinate system 99 of FIG. 1. When the earth conductor 2 is arranged in parallel to the earth plane, it transmits vertically polarized waves and horizontally polarized waves which are orthogonal to each other. Send and receive.

In the chip antenna 1E shown in FIG. 8, the monopoles 14 (14A to 14D) arranged on the side surfaces (front and back and front) of the dielectric block 4 are arbitrary toward the upper surface of the dielectric block 4. It is inclined at an angle. The length of the inclined monopole 14 is also the same as that of the chip antenna 1 shown in FIG.
As in the case of D, the wavelength is approximately 1 /
Select 4 wavelengths. The monopole 14 also has a coordinate system 9 shown in FIG.
9 has an electric field of the Z component and the electric field of the X component, and transmits and receives vertically and horizontally polarized radio waves when the ground conductor 2 is arranged parallel to the earth plane.

In the chip antennas 1D and 1E, the monopoles 13 and 14 are arranged on the front and back sides of the dielectric block 4, but they may be arranged on the left and right sides. In this case, the electric field component has the electric field of the Z component and the electric field of the Y component in the coordinate system 99 of FIG.
When the antennas are arranged in parallel to the earth plane, they transmit and receive vertically polarized waves and horizontally polarized waves, although their directing directions with respect to the horizontally polarized waves are different.

Also, in FIGS. 1 to 8 described above, the outer shape of the chip antenna 1, that is, the outer shape of the dielectric block 4 is a rectangular parallelepiped.
The same polarization forming effect can be obtained with a cylindrical or hemispherical shape.

FIG. 9 is a perspective view showing a seventh embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 10 is a perspective view showing an eighth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 11 is a perspective view showing a ninth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 12 shows a tenth embodiment of the chip antenna according to the present invention.
It is the perspective view which penetrated the conductor part. FIG. 13 is a perspective view showing an eleventh embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 14 is a perspective view showing a twelfth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 15 is a perspective view showing a thirteenth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through. FIG. 16 is a perspective view showing a fourteenth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through.

Each of FIGS. 9 to 16 shows an example in which the radiating elements of the elements 5 and 6 in the chip antenna 1 of FIG. 1 are respectively modified or radiating elements are added or reduced.

First, referring to FIG. 9, a chip antenna 1F has an element 51 connected to the tip end H of the element 5 shown in FIG. 1 so as to be perpendicular to the element 5 and parallel to the element 6. Elements 51, 5 and 6
If the sum of the lengths is selected in the range of approximately λg / 4 to λo / 4 (to be selected to be approximately 波長 wavelength with respect to the wavelength of the used frequency), the phase of the electric field component between the element 6 and the element 51 becomes Since the direction is opposite to the radiation in the Z direction in the coordinate system 99 in FIG. 1, the electric field of the X component in the Z direction (horizontal polarization when the ground conductor 2 is arranged parallel to the earth plane) is slightly increased. It is highly likely that the suppressed radiation pattern will be obtained. When the sum of the lengths of the elements 51, 5, and 6 is selected to be approximately 3λg / 4 to 3λo / 4, the phases of the electric field components of the element 6 and the element 51 are in phase with respect to the radiation in the Z direction. It is highly likely that the electric field of the X component in the Z direction has a large radiation pattern shape.

Referring to FIG. 10, chip antenna 1G
Is connected to the tip end H of the element 5 in FIG. 1 in a direction in which the tip is closed at an arbitrary angle within 90 degrees with respect to the element 5. However, element 52
The tip may be connected to the element 5 in a direction that opens at an arbitrary angle of 90 degrees or more.

Referring to FIG. 11, the chip antenna 1H
Is connected to an end 53 of the element 6 in FIG. Element 53
Is open in any direction in which the tip opens at an angle within 90 degrees with respect to the element 6. Note that the angle of the element 53 with respect to the element 6 may be any angle exceeding 90 degrees.

Referring to FIG. 12, chip antenna 1J
Is the element 5 at the tip H of the element 53 in FIG.
4 is connected so as to be parallel to the element 6. The element 54 may be connected to the element 53 at an arbitrary angle.

In the chip antennas 1G, 1H and 1J shown in FIGS. 10 to 12, the sum of the lengths of the elements 6, 5 and 52 of the chip antenna 1G,
The sum of the lengths of the elements 6 and 53 of H and the sum of the lengths of the elements 6, 53 and 54 of the chip antenna 1J are:
Approximately λg / 4 to λo / 4, or approximately 3λg / 4 to 3λ
o / 4, that is, almost １ ／ wavelength or ／ wavelength of the used frequency is often selected. At this time, the magnitude of the electric field component, the shape of the radiation pattern, and the polarization are governed by the current distribution determined by the length of each selected element as described with reference to FIG.

Referring to FIG. 13, chip antenna 1K
Is a modification of the element 6 of FIG. That is, at the connection point P between the element 6 and the element 7 in FIG. 1, the element 55 is arranged such that the element 6 is parallel to the ground conductor 2 and has an arbitrary angle. Here, it should be noted that the chip antenna 1K has no element 5. Element 5
The length of 5 is generally selected to be approximately λg / 4 to λo / 4, that is, approximately 波長 wavelength at the used frequency. If the element 55 at that time is arranged at an angle of 45 degrees with respect to the X axis of the coordinate system 99 in FIG. 1 and parallel to the ground conductor 2, the electric field component from the element 55 will be an X component and a Y component. Have substantially the same value, and a horizontally polarized radio wave is transmitted and received.

Referring to FIG. 14, chip antenna 1L
Is composed of a meander line which is a short bent line at the tip end G of the element 6 shown in FIG. 1, the upper surface of the dielectric block 4, and the portion bent perpendicular to the element 6 in parallel with the ground conductor 2. The element 56 is connected and arranged instead of the element 5.

Referring to FIG. 15, the chip antenna 1M is a line which is zigzagly bent at the tip end G of the element 6 shown in FIG. 1 in parallel with the upper surface of the dielectric block 4 and the ground conductor 2. A zigzag line-shaped element 57 is connected and arranged instead of the element 5.

Further, referring to FIG. 16, the tip antenna 1N is attached to the tip G of the element 6 shown in FIG.
An inner winding spiral element 58 having an angle parallel and perpendicular to the element 6 is connected and arranged instead of the element 5. The element 58, which is a radiating element, is connected and arranged so as to be parallel to the upper surface of the dielectric block 4 and the ground conductor 2 like the other (radiating) elements 5 and 6. Note that the element 58 may have a circular or elliptical spiral shape.

Chip antenna 1 shown in FIGS.
In L, 1M, and 1N, the sum of the lengths of the elements formed on the upper surface of the dielectric block is approximately λg / 4 to λo /
4, or an odd multiple thereof (ie, a quarter wavelength at the operating frequency or an odd multiple thereof).
The fact that the magnitude of the electric field component, the shape of the radiation pattern, and the polarization at that time are governed by the current distribution determined by the length of each selected element has been described with reference to FIG. 1 or FIG. It is as follows.

[0055]

As described above, the present invention relates to a chip antenna formed on a dielectric block including a substantially rectangular parallelepiped outer surface, wherein a linear first radiating element provided on one surface of the dielectric block; A second radiating element bent at one end of the first radiating element and on one surface of the dielectric block; a ground conductor provided on the other surface of the dielectric block; A third radiating element for connecting the other end of the radiating element substantially perpendicularly to the ground conductor, and a first radiating element provided on the other surface of the dielectric block so as to be insulated from the ground conductor. Comprising an electrode and a feeder connected between the electrode and a predetermined position of the first radiating element,
In addition to the features unique to chip antennas, such as small size, light weight, low cost, and ease of mounting on a device, there is an effect that radio waves having a plurality of directional directions and polarized waves having different directions can be simultaneously transmitted and received.

Further, the chip antenna according to the present invention can transmit and receive radio waves of different directions simultaneously by forming a monopole perpendicular to the ground conductor on the dielectric block. By combining the systems, there is an effect that an antenna capable of efficiently transmitting and receiving linearly polarized waves having polarizations in three axial directions can be formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a chip antenna according to the present invention and is a transparent view of a conductor portion.

FIG. 2 is an exploded perspective view showing a conductor portion of the chip antenna according to the embodiment of FIG. 1; (A) is a back front view,
(B) is a left side view, (c) is a top view, (d) is a right side view, (e) is a front view, and (f) is a bottom view.

FIG. 3 is an exploded perspective view for explaining a manufacturing process of the chip antenna according to the embodiment of FIG. 1;

FIG. 4 is a perspective view showing a second embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through; (A)
Is an overall view, and (b) is a partially enlarged view.

FIG. 5 is a perspective view showing a third embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 6 is a perspective view showing a fourth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 7 is a perspective view showing a fifth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 8 is a perspective view showing a sixth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 9 is a perspective view showing a seventh embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 10 is a perspective view showing an eighth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 11 is a perspective view showing a ninth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 12 is a perspective view showing a tenth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 13 is a perspective view showing an eleventh embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 14 is a perspective view showing a twelfth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 15 is a perspective view showing a thirteenth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

FIG. 16 is a perspective view showing a fourteenth embodiment of the chip antenna according to the present invention, in which a conductor portion is seen through;

[Explanation of symbols]

1,1A-1H, 1J-1N Chip antenna 2 Ground conductor 3,31 Electrode 4 Dielectric block 41-46 Dielectric plate 5,6,7,8,51,52,53,54,55,5
6, 57, 58 Elements 9, 10, 11 Feeding lines 12 (12A to 12D), 13 (13A to 13D), 1
4 (14A-14D) Monopole 99 Coordinate system 101, 102, 201 Current distribution

Claims (22)

[Claims] 1. A chip antenna formed on a dielectric block including a substantially rectangular parallelepiped outer surface, wherein: a linear first radiating element provided on one surface of the dielectric block; one end of the first radiating element; And a second bent and connected to one surface of the dielectric block.
Radiating element, a ground conductor provided on the other surface of the dielectric block, and a third radiation connecting the ground conductor and the other end of the first radiating element in a direction substantially perpendicular to the ground conductor. An element and a first electrode provided on the other surface of the dielectric block so as to be insulated from the ground conductor;
A chip antenna comprising: a feeder connected between the electrode and a predetermined position of the first radiating element. 2. The method according to claim 2, wherein the second radiating element is provided with the first radiating element.
2. The chip antenna according to claim 1, wherein said chip antenna is bent substantially at right angles to said radiating element. 3. The chip antenna according to claim 1, wherein a total length of the first radiating element and the second radiating element is approximately 波長 wavelength at a working frequency. 4. The chip antenna according to claim 1, wherein the ground conductor is disposed so as to replace a side surface of the dielectric block. 5. The power supply line has a first portion perpendicular to the electrode, a second portion horizontal to the ground conductor having one end connected to a tip of the first portion, and one end connected to the ground conductor. The first
3. The chip according to claim 1, further comprising a third portion connected to a predetermined position of the radiating element and having a third end connected to the other end of the second portion and perpendicular to the ground conductor. antenna. 6. The dielectric block is formed by stacking a plurality of dielectric plates, and the first and second radiating elements, the ground conductor, and the second portion of the feeder line are different from each other. A via hole formed of a conductor pattern provided on the dielectric plate, wherein the third radiating element, the first portion of the feed line, and the third portion of the feed line pass through the dielectric plate passing therethrough; The chip antenna according to claim 5, wherein the chip antenna is formed of: 7. The chip according to claim 6, wherein the first radiating element is formed on a dielectric plate laminated inside the dielectric block instead of one surface of the dielectric block. antenna. 8. The chip antenna according to claim 2, wherein a fourth radiating element parallel to the first radiating element is connected to a tip of the second radiating element. 9. The chip antenna according to claim 1, wherein a tip of the second radiating element is formed to have an angle other than 90 degrees with respect to the first radiating element. 10. The chip antenna according to claim 2, wherein a fourth radiating element having a tip facing the first radiating element is connected to a tip of the second radiating element. 11. The radiating element according to claim 1, further comprising a fourth radiating element connected in parallel with the first radiating element to a tip of the second radiating element.
0. A chip antenna according to claim 1. 12. The chip antenna according to claim 1, wherein the first radiating element is bent at an arbitrary angle at a connection point with the feeder line. 13. The chip antenna according to claim 1, wherein the second radiating element has a meander line configuration having angles parallel and perpendicular to the first radiating element. 14. The chip antenna according to claim 1, wherein the second radiating element has a zigzag line configuration. 15. The chip antenna according to claim 1, wherein the second radiating element has a spiral structure. 16. The chip antenna according to claim 5, wherein the second portion of the feed line forms a microstrip line with the ground conductor. 17. The method according to claim 17, wherein the first block is provided on a side surface of the dielectric block.
The chip antenna according to claim 1, further comprising a second electrode connected to the first electrode. 18. The chip antenna according to claim 1, further comprising at least one monopole that goes upward from a side surface of the dielectric block and is connected to the ground conductor. . 19. The chip antenna according to claim 18, wherein each of the four side surfaces of the dielectric block has a monopole connected to the ground conductor and oriented in a vertical direction. 20. Each of the four side surfaces of the dielectric block is connected to the ground conductor and extends in a vertical direction, and a monopole extending from an intermediate portion in a direction parallel to the first radiating element. 19. The chip antenna according to claim 1, wherein the chip antenna is provided. 21. Each of the four side surfaces of the dielectric block has a monopole connected to the ground conductor and extending diagonally on the side surface and in a direction parallel to the first radiating element. The chip antenna according to any one of claims 1 to 5, wherein: 22. The dielectric block including the substantially rectangular parallelepiped outer surface, the upper surface of which is replaced by one of a cube, a polygonal column, a column, and a hemisphere. 16. The chip antenna according to any one of items 15 to 15.