JP3514305B2 - Chip antenna - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip antenna used for mobile communication equipment, wireless LAN equipment and the like.

[0002]

2. Description of the Related Art In recent years, with the spread of mobile phones and wireless LAN (local area network) devices,
There is a growing need for chip antennas that are lightweight, easy to mount, and require no adjustment. Originally, when an antenna focuses on its radiation efficiency, gain performance, and band,
It is necessary to make the size equivalent to the wavelength or larger.
In addition, when the antenna is mounted on a mobile phone or a wireless LAN device, the plastic cover of the antenna must have a certain thickness in order to maintain the original shape of the antenna and suppress interference with the surroundings. Furthermore, when using the device, it was necessary to consider not to arrange a conductor such as metal near the antenna.

However, recently, CDMA (Code
(Division Multiple access)
Technology and OFDM (Orthogonal Frequency)
ncy Division Multiplexin
Various fadings such as g) technology have occurred, and digital communication systems capable of good communication even in a multiplex propagation path environment in which various interference waves exist are being put to practical use. As a result, the antenna does not have to have a size corresponding to the wavelength, and it is no longer necessary to design a wireless LAN device or the like in consideration of the various restrictions on the antenna as described above, and the efficiency and gain are somewhat poor. Even small,
Lightweight and easily mountable chip antennas have come into use. Various chip antennas have been developed and put on the market in line with such technological trends.

[0004]

However, these conventional chip antennas are too specialized to make the size of an antenna having a size corresponding to a conventional wavelength into a chip size. Not considered at all. Originally, in a multi-path environment, for example, even if it is assumed that communication is performed with vertical linear polarization, in actual communication, horizontal linear polarization with a polarization plane orthogonal to the polarization plane of the vertical polarization also occurs. ing. This is because, for example, when making a call with a mobile phone, the phone is usually held in a tilted state, and the antenna is tilted to radiate both vertical and horizontal polarized components. In addition, regarding the installation of the wireless LAN device, it may be installed at a slight angle due to the location of the installation. Further, the polarization may rotate in the process of multiple propagation to generate both vertical and horizontal components.

Therefore, if an antenna capable of transmitting and receiving both vertical and horizontal polarization components can be used, the effective gain of the antenna can be increased and the line quality can be improved. Therefore, an object of the present invention is to provide a chip antenna capable of simultaneously transmitting and receiving a plurality of linearly polarized waves having different polarization plane directions.

[0006]

In order to achieve the above object, the present invention provides plate-shaped first and second ground conductors which are arranged with a first dielectric layer sandwiched between them and plate surfaces facing each other. , In the first dielectric layer with a space between the first and second ground conductors, extending generally in the same direction as the first and second ground conductors, and having one end connected to an electrode A first feed line, a second dielectric layer extending on a surface of the second ground conductor opposite to the first dielectric layer, and a second dielectric layer, A first extending on a surface opposite to the second ground conductor,
Between the first element and the first feeder without contacting the second ground conductor through a through hole formed in the second ground conductor and the element A second element extending through the dielectric layer, the base of which is connected to the other end of the first feed line in the first dielectric layer and the tip of which is connected to the first element. , The second element extends substantially perpendicularly to the second ground conductor, and has a slot that intersects the first power supply line in a plan view and extends in the vicinity of the first power supply line. The slot is formed in the second ground conductor,
Extending generally perpendicular to the direction of extension of the first feeder
And said that you are. The present invention also provides a first dielectric
A first plate-like member that is arranged with the layers sandwiched between the plate surfaces facing each other
And a second ground conductor, and in the first dielectric layer,
A space is provided between the first and second ground conductors, and the first conductor
And the second ground conductor extend in the same direction and one end is electrically charged.
A first feed line connected to the pole and the second ground conductor,
A second dielectric extending on a surface opposite the first dielectric layer.
An electric conductor layer, and the second ground conductor of the second dielectric layer,
A first element extending on the opposite surface, said second element
To the second ground conductor through a through hole formed in the ground conductor of
The first element and the first supply without contact.
Extends between the wire and the first and second dielectric layers
An existing base of the first feed line in the first dielectric layer.
The other end is connected and the tip is connected to the first element.
A second element, and the second element
Extends generally perpendicular to the second ground conductor and
When viewed in plan, the first power supply line intersects with the first power supply line.
A slot extending proximate the line is formed in the second ground conductor.
The slot is formed in the extending direction of the first feeder line.
It is characterized in that it extends obliquely .

According to the present invention, when a high frequency signal is supplied from the electrode to the second element through the first power supply line, the second element radiates a first electric field parallel to the extending direction of the second element. It On the other hand, when the high-frequency signal propagates through the first power supply line, a magnetic current is excited in the slot, and as a result, it is substantially perpendicular to the extending direction of the slot and substantially parallel to the extending direction of the second ground conductor. A second electric field is emitted. That is, the chip antenna of the present invention simultaneously radiates an electromagnetic wave containing two linear polarization components whose polarization planes are orthogonal to each other. Therefore, two linearly polarized wave components orthogonal to each other can be simultaneously received by the chip antenna of the present invention. Therefore, when the chip antenna of the present invention is used in a mobile communication device, a wireless LAN device, or the like, it is possible to transmit and receive two linearly polarized components that are orthogonal to each other, and the effective gain of the antenna is increased to improve the line quality. Can be improved.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view showing an example of a chip antenna according to the present invention, and FIG. 2 is a perspective plan view of the chip antenna shown in FIG. 3A is a perspective side view of the chip antenna according to the embodiment, FIG. 3B is a partial perspective view showing a part of the chip antenna, and FIG. 4 is an exploded view of the chip antenna according to the embodiment. It is a perspective view.

As shown in FIG. 1, the chip antenna 100 according to the embodiment has a bottom surface of a dielectric body 1 formed in a generally rectangular parallelepiped composed of a first dielectric layer 1A and a second dielectric layer 1B and The intermediate layer has a ground conductor 2 and a ground conductor 3 made of a conductor, and further has a square element 9 (first element according to the present invention) on the upper surface of the dielectric 1. Although the element 9 has a square shape in the present embodiment, the shape of the element 9 may be a rectangle, a rhombus, a parallelogram, a circle, an ellipse, etc., instead of the square shape.

The tip of a rod-shaped element 8 (second element according to the present invention) is connected to the element 9 at the center of its back surface, and the base of the element 8 is a through hole 7 formed in the ground conductor 3. And is connected to the power supply line 6. The length of the element 8 can be set based on the wavelength of the electromagnetic wave used in the dielectric 1 with reference to λg. Now, assuming that the free space wavelength of the electromagnetic wave to be emitted from the chip antenna 100 is λo, the wavelength in the dielectric 1 is λg, and the relative permittivity of the dielectric 1 is εr, λg is expressed by the following equation.

[0011]

## EQU1 ## λg = λo / (εr) ^1/2 The length of the element 8 is set to a desired length of about λg / 4 or less by using such a wavelength λg. can do.

The power supply line 6 is made of a strip-shaped conductor, extends between the ground conductor 2 and the ground conductor 3 in parallel with these ground conductors, and has electrodes at one end through a power supply line 5 made of a conductor. Four
It is connected to the. The base of the element 8 is connected to the other end of the power supply line 6 as described above. Such a power supply line 6 forms a strip line together with the ground conductors 3 and 3. The impedance of the power supply line 6 can be adjusted by slightly changing the width of the power supply line 6 at different positions in the extending direction.

A cutout portion 15 is formed in the ground conductor 2,
The electrode 4 is arranged at the notch 15 at a distance from the ground conductor 2, and is attached to the lower surface of the dielectric 1. When mounting the chip antenna on a printed circuit board or the like, the electrode 4 is used as an electrode for feeding.

A slot 10 is formed in the ground conductor 3. As shown in FIG. 2, the slot 10 has a twisted positional relationship with the power supply line 6, is spaced apart from the power supply line 6, and extends substantially perpendicularly to the power supply line 6. The length 303 of the slot 10 in the extending direction, that is, the longitudinal direction.
Is approximately λg / 2, or
It can be set to a shorter length. The width 304 of the slot can be set to a value that is sufficiently smaller than λg as a desired width, specifically, a value of λg / 10 or less. In addition, in the present embodiment, the slot 10 is formed in a rectangular shape, but other than this shape, for example, an elongated elliptical shape is also possible.

A feed line 6 is provided between the ground conductor 2 and the ground conductor 3.
In order to form a strip line by the ground conductors 2 and 3, a short pin 11 made of a conductor is connected close to the feeder line 6. The ground conductor 2 and the ground conductor 3 are electrically set to the same potential by the short pin 11. The number of the short pins 11 may be any number as long as the ground conductor 2 and the ground conductor 3 have the same potential in terms of high frequency, and one or more to several tens of short pins can be arranged. However,
If a high radiation efficiency is not required for the performance of the chip antenna 100, the short pin 11 may not be provided.

The dielectric 1 can be constructed by laminating dielectric plates 101 to 106 as shown in FIG. 4 as an example. The feeder line 6 is extended as a conductor pattern on the upper surface of the dielectric plate 105, the ground conductor 3 is extended on the upper surface of the dielectric plate 103, and the element 9 is extended on the upper surface of the dielectric plate 101. And, with the ground conductor 3 as the bottom layer,
The dielectric 1 is formed by stacking the dielectric plates in close contact with each other. The short pin 11 and the power supply line 5 may be replaced by a through hole formed on the dielectric plates 105 and 106 instead of the rod-shaped conductors penetrating the dielectric plates 105 and 106. is there.

Next, the operation of the chip antenna 100 thus constructed will be described. Power is supplied to the chip antenna by applying a high frequency signal between the electrode 4 and the ground conductor 3. When the ground conductor 3 is used as an electrode on the ground side, the high frequency signal applied to the electrode 4 is supplied to the elements 8 and 9 from the power supply line 5 through the power supply line 6. The high frequency signal fed to the element 8 is
It is distributed as a standing wave on 9 and is radiated to space. The current distribution of this standing wave is, for example, the current distribution 401 shown in FIG.

However, the current distribution on the element 9 is like the current distribution 403 shown in the partial perspective view around the element 9 in FIG. 3B, and the direction of the radiated electric field from the element 9 caused by this current distribution. Is as indicated by arrow 404. That is, the radiated electric fields from the elements 9 are electric fields in the directions canceling each other, and electromagnetic waves are hardly radiated from the elements 9. But,
From the element 8, an arrow 40 parallel to the Z axis of the coordinate system 99 (FIG. 1), that is, parallel to the extending direction of the element 8.
An electric field in the direction indicated by 2 is radiated.

On the other hand, the high frequency signal fed to the electrode 4 is
The slot 10 is also excited while propagating on the feeder line 6. At this time, the magnetic current excited on the slot 10 is shown in FIG.
It becomes something like 301. The magnetic current 301 radiates an electric field in a direction indicated by an arrow 302 parallel to the X axis of the coordinate 99.

As described above, in the chip antenna 100 of this embodiment, electric field components parallel to the X axis and the Z axis of the coordinate system 99 are radiated, and therefore, two kinds of straight lines whose polarization planes are orthogonal to each other. An electromagnetic wave containing a polarized component is radiated. Further, with such a chip antenna 100,
It is possible to simultaneously receive two types of linearly polarized components that are orthogonal to each other. Therefore, when the chip antenna 100 is used in a mobile communication device, a wireless LAN device, or the like, both vertical and horizontal polarization components can be transmitted / received, the effective gain of the antenna is increased, and the line quality is improved. Can be realized.

As is clear from the above description and FIGS. 1 to 4, since the element 8 is basically provided and the slot 10 is formed in the ground conductor 3, the structure is simple. Chip Antenna 10 of Embodiment
0 can be a chip-shaped small and lightweight antenna. Therefore, it can be mounted in a narrow space, which is effective in reducing the size and weight of the device. Furthermore, since it is chip-shaped, it is SMT (Surface Mount).
Technology) mounting is possible and the assembly cost for mounting the antenna on the device can be suppressed. Further, it is possible to reduce the cost by mass production. Further, since it is not necessary to perform the adjustment work, the assembly cost of the device can be suppressed also in this respect.

Next, a second embodiment of the present invention will be described. FIG. 5 is a perspective plan view showing a chip antenna according to a second embodiment of the present invention. In the figure, the same symbols are attached to the same elements as in FIG. 1 and the like. In this chip antenna 108, the slot 10 is formed in the ground conductor 3.
Are inclined with respect to the power supply line 6. Even when the slots are inclined in this way, as in the case of the above-described embodiment, in the process of the high-frequency signal propagating through the feeder line 6,
A magnetic current is excited on the slot 10, and an electric field in the direction indicated by the arrow 502 along the plate surface of the ground conductor 3 is radiated. This electric field is also orthogonal to the electric field generated by the element 8. Therefore, also in the chip antenna 108 of the second embodiment, two linearly polarized waves whose polarization planes are orthogonal to each other are simultaneously emitted.

Next, a third embodiment of the present invention will be described. FIG. 6 is a perspective view showing a chip antenna according to the third embodiment. In the figure, the same symbols are attached to the same elements as in FIG. 1 and the like. This chip antenna 10
7 differs from the chip antenna 100 in that the element 91 is used instead of the element 9. The element 91 has a strip shape and is provided on the upper surface of the dielectric 1 so as to be orthogonal to the element 8 and substantially parallel to the slot 10. The total length of the elements 8, 91 is
The desired length can be set to a value between approximately λg / 4 and λo / 4.

When such an element 91 is used,
The current distribution has a substantially sinusoidal distribution in which the tip end of the element 91 becomes zero and the amplitude gradually increases toward the base of the element 8. Therefore, the element 8 radiates an electric field parallel to the Z axis of the coordinate system 99, while the element 91 radiates an electric field parallel to the Y axis. As in the case of the chip antenna 100, an electric field parallel to the X axis is radiated from the slot 10, so that the polarization plane of the chip antenna 107 is X,
Three linearly polarized waves that are parallel to each other are emitted in the directions of all Y and Z coordinate axes. The element 91 does not necessarily have to extend linearly,
The same effect can be obtained even when extending slightly curved.

Next, a fourth embodiment of the present invention will be described. FIG. 7 is a perspective view showing a chip antenna according to the fourth embodiment. In the figure, the same elements as those in FIG. 6 are designated by the same reference numerals. The short pin 11 is omitted in FIG. 7 for simplicity. This chip antenna 109 is different from the chip antenna 107 of FIG.
The point is that two parasitic elements 21 are provided. The parasitic element 21 extends above the ground conductor 3 and orthogonal to the extending direction of the slot 10 and parallel to the ground conductor 3. In the present embodiment, the parasitic element 21 is located in front of and behind the dielectric 1 in FIG. Are attached and supported on the respective side surfaces of. The length of the parasitic element 21 can be set to approximately λg / 2 to λo / 2 to obtain a good result.

These parasitic elements 21 are arranged in the slot 10
It acts on the electric field component in the X-axis direction radiated from. By arranging the parasitic element 21 extending in the same direction as the electric field radiated from the slot 10 and having a resonance length of a frequency close to the frequency of the same electric field, the bandwidth of the slot 10 can be widened. become. This is to make the parasitic element 21 electromagnetically coupled to the slot 10 by resonating at a frequency slightly different from that of the slot 10 and disposing the parasitic element 21 in the vicinity, thereby broadening the band by the principle of stagger tuning. Is. The parasitic element 21 can be embedded in the dielectric 1 instead of being arranged on the side surface of the dielectric 1 as described above. Further, the number of parasitic elements 21 is not limited to two, and one or three or more parasitic elements 21 may be provided.

Next, a fifth embodiment of the present invention will be described. FIG. 8 is a perspective view showing a chip antenna according to the fifth embodiment. In the figure, the same elements as those in FIG. 6 are designated by the same reference numerals. In FIG. 8, the short pin is omitted for simplicity. The chip antenna 12 of the fifth embodiment differs from the fourth embodiment in that the parasitic element 21 is replaced with a parasitic element 22 on the left side surface portion of the dielectric 1 in the drawing. Is the point. The parasitic element 22 is arranged above the ground conductor 3 on the left side surface of the dielectric 1 so that the base side is parallel to the element 8. The parasitic element 22 is bent at a right angle in the middle part, and the base part is electrically connected to the ground conductor 3. The portion from the base to the bending point 14 is the dielectric 1
Extending parallel to the element 8 along the side of the
The portion from 4 to the tip portion extends vertically along the upper surface of the dielectric 1 in the extending direction of the slot 1. The length of the parasitic element 22 can be set to approximately λg / 4 to λo / 4 to obtain good results.

The parasitic element 22 acts on the electric field component in the X-axis direction of the coordinate system 99 radiated from the slot 10 and the electric field component in the Z-axis direction radiated from the element 8, and its base portion is the ground conductor 3. It operates as a 1/4 wavelength monopole parasitic element connected to the. The parasitic element 22 resonates at a frequency slightly different from the resonance frequency of the slot 10 and the elements 8 and 91, and by disposing such a parasitic element 22 in the vicinity, the parasitic element 22 is set to the slot 10 and the slot 10. Electromagnetically coupled to element 8,
The band of the slot 10 and the element 8 can be widened by the principle of stagger tuning. The parasitic element 22 of this type may be arranged on the right side surface portion of the dielectric body 1, may be arranged on both right and left side surfaces, or may be embedded inside the dielectric body 1.

Next, a sixth embodiment of the present invention will be described. FIG. 9 is a perspective view showing a chip antenna according to the sixth embodiment. In the figure, the same elements as those in FIG. 6 are designated by the same reference numerals. In FIG. 9, the short pin is omitted for simplicity. The chip antenna 16 of the sixth embodiment differs from the above-described embodiments in that a band-shaped parasitic element 23 is arranged on the upper surface of the dielectric 1. The parasitic element 23 extends at right angles to the extending direction of the slot 10 and in parallel with the ground conductor 3. The length of the parasitic element 23 can be set to approximately λg / 2 to λo / 2.

Such a parasitic element 23 is provided in the slot 1
It acts on the electric field component of the coordinate system 99 radiated from 0 in the X-axis direction, and like the chip antenna 109, in the same direction as the electric field radiated from the slot 10,
By arranging the parasitic element 23 having a resonance length of a frequency close to the frequency of the same electric field in the vicinity of the slot 10, the bandwidth of the slot 10 can be widened. It should be noted that one or more parasitic elements 23 may be arranged, and the same effect can be obtained not only on the upper surface of the dielectric 1 but also inside the dielectric 1. Further, the parasitic element 23 may be a conductor slightly curved in an arc shape.

Next, a seventh embodiment of the present invention will be described. FIG. 10 is a perspective view showing the chip antenna of the seventh embodiment. In the figure, the same symbols are attached to the same elements as in FIG. 1 and the like. The chip antenna 18 differs from the chip antenna 100 in that the slot 10
The point is that the slot 200 is formed in the ground conductor 3 instead of. The slot 200 has a generally H-shape, and both ends in the extending direction are formed wider than other portions. The shape of the wide ends may be circular or elliptical, instead of being rectangular as shown in FIG.

The slot length 201 is set to a length of approximately λg / 2 or less. Further, the slot width 202 is set to approximately λg / 8 or less, and (slot length 201) + (slot width 202) is set to approximately λg / 2. Even with such a slot 200, the chip antenna 100
As in the case of, the electric field in the X axis direction of the coordinate system 99 is radiated. In FIG. 10, a large number of short pins 11 are arranged along the peripheral portion of the chip antenna 18 as an example. However, such short pins may be provided as necessary, and high radiation efficiency is required. Otherwise, the short pin 11 may not be provided.

[0033]

As described above, according to the present invention, when a high frequency signal is supplied from the electrode to the second element through the first feeder line, the second element is parallel to the extending direction of the second element. The first electric field is emitted. on the other hand,
When the high-frequency signal propagates through the first power supply line, a magnetic current is excited in the slot, and as a result, the slot is substantially perpendicular to the extending direction of the slot and substantially parallel to the extending direction of the second ground conductor. An electric field of 2 is emitted. That is, the chip antenna of the present invention simultaneously radiates an electromagnetic wave containing two linear polarization components whose polarization planes are orthogonal to each other. Therefore, two linearly polarized wave components orthogonal to each other can be simultaneously received by the chip antenna of the present invention. Therefore, when the chip antenna of the present invention is used in a mobile communication device, a wireless LAN device, or the like, it is possible to transmit and receive two linearly polarized components that are orthogonal to each other, and the effective gain of the antenna is increased to improve the line quality. Can be improved.

[Brief description of drawings]

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

FIG. 2 is a perspective plan view of the chip antenna shown in FIG.

3A is a perspective side view of a chip antenna according to an embodiment, and FIG. 3B is a partial perspective view showing a part of the chip antenna.

FIG. 4 is an exploded perspective view of the chip antenna according to the embodiment.

FIG. 5 is a perspective plan view showing a chip antenna according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a chip antenna according to a third embodiment.

FIG. 7 is a perspective view showing a chip antenna according to a fourth embodiment.

FIG. 8 is a perspective view showing a chip antenna according to a fifth embodiment.

FIG. 9 is a perspective view showing a chip antenna according to a sixth embodiment.

FIG. 10 is a perspective view showing a chip antenna according to a seventh embodiment.

[Explanation of symbols]

1 ... Dielectric, 1A ... 1st dielectric layer, 1B ... 2nd
Dielectric layer, 2 ... Ground conductor, 3 ... Ground conductor, 4 ... Electrode, 5 ... Feed line, 6 ... Feed line, 7 ... Through hole, 8 ...
... Elements, 9 ... Elements, 10 ......... Slots, 15 ... Notches, 11 ... Short pins, 12
... Chip antenna, 14 ... Inflection point, 16 ... Chip antenna, 18 ... Chip antenna, 21 ... Parasitic element, 91 ... Element, 100 ... Chip antenna,
101 ... Dielectric plate, 102 ... Dielectric plate, 103 ...
Dielectric plate, 104 ... Dielectric plate, 105 ... Dielectric plate,
106 ... Dielectric plate, 107 ... Chip antenna, 10
8: Chip antenna, 109: Chip antenna, 2
00 …… Slot.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01Q 1/38 H01Q 1/40 H01Q 13/08 H01Q 21/24

Claims (20)

(57) [Claims] 1. A plate-shaped first and second ground conductors, which are arranged with a plate surface facing each other with a first dielectric layer sandwiched between them, and the first dielectric layer in which the first dielectric layer is formed. A first feed line having a space between the first and second ground conductors and extending substantially in the same direction as the first and second ground conductors and having one end connected to an electrode; and the second ground conductor. A second dielectric layer extending on a surface opposite to the first dielectric layer, and a second dielectric layer extending on a surface opposite to the second ground conductor of the second dielectric layer. The existing first element and the first element and the first power supply line without contacting the second ground conductor through a through hole formed in the second ground conductor. A base portion extending through the first and second dielectric layers, the base portion being connected to the other end of the first feed line in the first dielectric layer, and the tip portion being the first element. A second element connected to the first ground line, the second element extending substantially perpendicular to the second ground conductor, and intersecting the first power supply line in a plan view. is the formation in the extending slot in proximity to the feed line and the second ground conductor, the slot Oh to the extending direction of the first feed line
A chip antenna characterized in that it extends almost vertically . 2. The plate surfaces are opposed to each other with the first dielectric layer sandwiched therebetween.
And plate-shaped first and second ground conductors arranged in the same manner, and the first and second ground conductors in the first dielectric layer.
And a space between the first and second ground conductors and
A first supply extending generally in the same direction with one end connected to the electrode.
Surfaces of the electric wire and the second ground conductor on the side opposite to the first dielectric layer
A second dielectric layer extending upward and a surface of the second dielectric layer opposite to the second ground conductor.
The first element extending upward and the second element through the through hole formed in the second ground conductor.
The first element and the
The first and second dielectric layers are provided between the first feed line and
A base extending through the first dielectric layer in the first dielectric layer;
The first element is connected to the other end of the power supply line and has a tip portion.
A second element connected to the second ground conductor, and the second element is connected to the second ground conductor.
It extends generally vertically and intersects with the first power supply line in plan view, and
A slot extending in close proximity to the wire to the second ground conductor
Is formed, and the slot is inclined with respect to the extending direction of the first feeder line.
The chip antenna is characterized by being extended . Wherein the first element is formed in a plate shape, claim to square, rectangular, rhombus, parallelogram, characterized in that it exhibits circular, any shape of oval 1 or 2 The listed chip antenna. 4. A conductor insulated from the first power supply line, disposed between the first and second ground conductors, and having end portions connected to the first and second ground conductors, respectively. The chip antenna according to claim 1 or 2, further comprising at least one short pin consisting of 5. The chip antenna according to claim 4, wherein the shorting pin is arranged close to the first power supply line. 6. The method of claim 1, wherein the length of the second element when the wavelength of the electromagnetic wave emitted by the lambda] g in the dielectric layer is less than approximately lambda] g / 4 or lambda] g / 4 or 2. The chip antenna according to 2 . 7. The length of the slot is approximately λg, where λg is the wavelength of the electromagnetic wave radiated into the dielectric layer.
2. Shorter than / 2 or λg / 2.
Or the chip antenna according to 2 . 8. The method of claim 1 or 2, wherein the chip antenna, wherein the width of the case the wavelength of the electromagnetic wave radiated in the dielectric layer was set to lambda] g slots is lambda] g / 10 or less. 9. The method of claim 1 or 2, wherein the chip antenna, wherein said first power supply line is formed in a strip shape. 10. The first ground conductor has a cutout portion, and the electrode is arranged in the cutout portion so as to be insulated from the first ground conductor. The chip antenna according to 1 or 2 . 11. The chip antenna according to claim 10, wherein an end portion of the first power supply line is connected to the electrode via a second power supply line. 12. The first element comprises a conductor that extends generally parallel to the slot, the conductor having a width that is sufficiently narrow relative to the length in the longitudinal direction that one end of the second element is according to claim 1 or 2, wherein the chip antenna is characterized in that it is connected to the distal end. 13. The second ground conductor, which is disposed on a surface side of the second ground conductor opposite to the first ground conductor, is adjacent to the slot, and extends substantially orthogonally to an extending direction of the slot. according to claim 1 or 2, wherein the chip antenna is characterized by having a first parasitic elements supported by a dielectric layer. 14. The length of the first parasitic element is approximately λ, where λg is a wavelength of an electromagnetic wave radiated in the dielectric layer and λo is a wavelength of an electromagnetic wave radiated in a free space.
14. The chip antenna according to claim 13 , wherein the chip antenna has g / 2 to λo / 2. 15. The second ground conductor is disposed on a surface side of the second ground conductor opposite to the first ground conductor and is arranged in proximity to the slot and the second element, and is supported by the second dielectric layer. A second parasitic element, wherein the second parasitic element has a base connected to the second ground conductor, and
Bends at a substantially right angle, extends generally parallel to the second element from the base to the bending point, and extends generally perpendicular to the slot and the second element from the bending point to the tip. The chip antenna according to claim 1 or 2 , characterized in that: 16. The length of the second parasitic element is approximately λ, where λg is a wavelength of an electromagnetic wave radiated in the dielectric layer and λo is a wavelength of an electromagnetic wave radiated in a free space.
16. The chip antenna according to claim 15 , wherein g / 2 to λo / 2. 17. The method of claim 1 or 2, wherein the chip antenna the slot is characterized in that both end portions are formed wide. 18. The shapes of the both ends are generally rectangular,
Claim, characterized in that it is circular or elliptical, 17
The listed chip antenna. 19. The first to fourth dielectric layers are provided.
A plurality of dielectric plates are stacked, and the first ground conductor is disposed as a lowermost layer, and the first dielectric plate is arranged in close contact with the upper surface of the first ground conductor, and the first ground conductor is disposed on the upper surface. A second dielectric plate on which the power feeding line is extended is closely arranged on the first dielectric plate, and a third dielectric plate is closely attached on the second dielectric plate. is arranged, claims, characterized in that the fourth dielectric plate and the second ground conductor is extended on the upper surface are arranged in close contact on the third dielectric plate 1 or 2 The listed chip antenna. 20. The second dielectric layer comprises fifth and sixth layers.
The fifth dielectric plate, wherein the fifth dielectric plate is disposed in intimate contact with the second ground conductor, and the first element is provided on the upper surface of the sixth dielectric plate. 3. The chip antenna according to claim 1, wherein the chip antenna is closely arranged on the fifth dielectric plate.