KR102196518B1 - Dielectric resonator antenna, mimo antenna, and wireless communication device with the same - Google Patents

Abstract

Disclosed are a dielectric resonator antenna, and a MIMO antenna and a wireless communication device providing the same. According to one disclosed embodiment, the dielectric resonator antenna comprises: a substrate; a ground plane provided on one surface of the substrate; a power supply unit provided on the other surface of the substrate; a slot unit provided by removing the ground plane on one surface of the substrate, and formed at a position corresponding to the end of the power supply unit; and a dielectric resonator provided on one surface of the substrate on the slot unit.

Description

A dielectric resonator antenna and a MIMO antenna and wireless communication device having the same.

Embodiments of the present invention relate to dielectric resonator antenna technology.

Recently, MIMO (Multiple Input Multiple Output) technology has been continuously developed in wireless communication systems, and is being used for WLAN (Wireless Local Network), LTE (Long-Term Evolution), and 5G communication. The MIMO antenna is mounted on a mobile terminal or a base station. At this time, it is required to downsize the MIMO antenna due to space saving and space efficiency. In addition, since a plurality of antennas fit into a limited space in a MIMO antenna, it is important to secure isolation between the antennas.

Korean Registered Patent Publication No. 10-1119267 (2012.03.16)

Disclosed embodiment is to provide a dielectric resonator antenna capable of implementing a broadband while having high radiation efficiency, a MIMO antenna and a wireless communication device having the same.

An embodiment disclosed is to provide a dielectric resonator antenna capable of improving isolation between antennas, a MIMO antenna including the same, and a wireless communication device.

A dielectric resonator antenna according to an embodiment disclosed includes a substrate; A ground plane provided on one surface of the substrate; A feeding part provided on the other surface of the substrate; A slot portion provided by removing the ground plane on one surface of the substrate and formed at a position corresponding to an end portion of the feed portion; And a dielectric resonator provided on the slot on one surface of the substrate.

The slot portion may include a circular slot formed at a position corresponding to an end portion of the feeding portion on one surface of the substrate; A first arm slot provided in a first direction on an outer peripheral surface of the circular slot; And a second arm slot provided in a second direction perpendicular to the first direction on an outer circumferential surface of the circular slot.

The first arm slot may include: a 1-1 arm slot provided toward a first edge of the substrate from an outer peripheral surface of the circular slot; And a 1-2 arm slot provided toward a second edge positioned in a direction opposite to the first edge of the substrate on an outer circumferential surface of the circular slot, wherein the 1-1 arm slot and the 1-2 arm The slot may be provided symmetrically with respect to the center of the circular slot.

The second arm slot may include a 2-1 arm slot provided toward a third edge of the substrate from an outer circumferential surface of the circular slot; And a 2-2 arm slot provided toward a fourth edge positioned in a direction opposite to the third edge of the substrate on an outer circumferential surface of the circular slot, wherein the 2-1 arm slot and the 2-2 arm The slot may be provided symmetrically with respect to the center of the circular slot.

The first arm slot may be provided with a length shorter than the length of the second arm slot.

The dielectric resonator may have a hexahedral shape, and may include a cutting portion provided by cutting both edges of the dielectric resonator to a predetermined depth.

The cutout portions may be formed at both corners of the dielectric resonator in the second direction.

The dielectric resonator antenna may include a stand insertion hole formed in the substrate; And a stand inserted into the stand insertion hole and fixing the dielectric resonator.

The dielectric resonator has a hexahedral shape, and the stand may be bonded to both corner portions on a lower surface of the dielectric resonator.

A dielectric resonator antenna according to another disclosed embodiment includes a substrate; A ground plane provided on one surface of the substrate; A feeding part provided on the other surface of the substrate; A stand insertion hole formed in the substrate; A stand inserted into the stand insertion hole; And a dielectric resonator provided on one surface of the substrate at a position corresponding to an end portion of the power supply unit, and having a lower surface fixed by the stand.

The MIMO antenna according to the disclosed embodiment includes a substrate; A ground plane provided on one surface of the substrate; A first power feeding part provided on the other surface of the substrate; A second feeding part provided to be spaced apart from the first feeding part on the other surface of the substrate; A first dielectric resonator antenna provided on one surface of the substrate and fed by the first power supply unit; A second dielectric resonator antenna provided on one surface of the substrate and fed by the second power supply unit; And an isolation part provided between the first dielectric resonator antenna and the second dielectric resonator antenna on one surface of the substrate.

The first dielectric resonator antenna includes: a first slot portion provided on one surface of the substrate with the ground plane removed, and formed at a position corresponding to an end portion of the first feed portion; And a first dielectric resonator provided on the first slot on one surface of the substrate, wherein the second dielectric resonator antenna is provided by removing the ground plane from one surface of the substrate, and the second power supply unit A second slot formed at a position corresponding to the end of the; And a second dielectric resonator provided on the second slot on one surface of the substrate.

Each of the first and second slots includes a circular slot provided on one surface of the substrate; A first arm slot provided in a first direction on an outer peripheral surface of the circular slot; And a second arm slot provided in a second direction perpendicular to the first direction on an outer circumferential surface of the circular slot.

Each of the first dielectric resonator and the second dielectric resonator may have a hexahedral shape, and may include a cutting portion provided by cutting both edges of the first dielectric resonator and the second dielectric resonator to a predetermined depth at upper ends of the first dielectric resonator and the second dielectric resonator. .

The isolation unit may include one or more unit isolation structures arranged along the substrate on one surface of the substrate, and the unit isolation structure may be provided through the ground plane.

The unit isolation structure may be an electromagnetic band gap structure provided to form a band gap in a resonant frequency band of the first dielectric resonator antenna and the second dielectric resonator antenna.

The isolation unit may further include a spacing slot provided by removing the ground plane from one surface of the substrate along an edge of the unit isolation structure, and separating the unit isolation structure from the ground plane.

The unit isolation structure may include a first pattern; A second pattern connected to the first edge of the first pattern and provided; A third pattern connected to the second edge of the first pattern and provided; A fourth pattern connected to the third edge of the first pattern and provided; A fifth pattern connected to the fourth edge of the first pattern and provided; A first stub connected to the first pattern between the second pattern and the third pattern; A second stub connected to the first pattern between the second pattern and the fourth pattern; A third stub connected to the first pattern between the fourth pattern and the fifth pattern; And a fourth stub connected to the first pattern between the fifth pattern and the third pattern.

A MIMO antenna according to another disclosed embodiment includes a substrate; A ground plane provided on one surface of the substrate; A plurality of power feeding units spaced apart from each other on the other surface of the substrate; A plurality of dielectric resonator antennas respectively fed by the plurality of power feeding units on one surface of the substrate; And one or more unit isolation structures provided between the plurality of dielectric resonator antennas on one surface of the substrate, arranged along the substrate, and formed through the ground plane.

According to the disclosed embodiment, by providing a first arm slot and a second arm slot vertically in a circular slot on one surface of a substrate, and forming cutouts at both upper ends of the dielectric resonator, the dielectric resonator antenna may have circular polarization. You can do it.

In addition, by inserting the stand into the stand insertion hole of the substrate and fixing the dielectric resonator to the substrate through the stand, it is possible to prevent performance degradation due to the adhesive in the dielectric resonator antenna.

In addition, by forming an isolation portion through an electromagnetic band gap structure between the dielectric resonator antennas, it is possible to improve the isolation between antennas in the MIMO antenna. In this case, since the isolation unit is formed through the ground plane of the substrate, a separate space area is not required, and thus, the isolation between the dielectric resonator antennas having circular polarization characteristics can be improved even without increasing the size of the MIMO antenna.

1 is a perspective view showing a dielectric resonator antenna according to an embodiment of the present invention
2 is an exploded perspective view of a dielectric resonator antenna according to an embodiment of the present invention
3 is a plan view showing a lower surface of a substrate in a dielectric resonator antenna according to an embodiment of the present invention
4 is a diagram showing an electric field distribution of a dielectric resonator antenna according to an embodiment disclosed
5 A graph comparing the axial ratio when an adhesive is used between the ground plane and the dielectric resonator and a stand is used in the dielectric resonator antenna according to an exemplary embodiment disclosed in FIG. 5
6 is a plan view showing a MIMO antenna using a dielectric resonator according to an embodiment of the present invention
7 is a view showing a unit isolation structure in an embodiment disclosed
8 is a view showing a state in which a unit isolation structure forms a band gap in a resonant frequency band of a dielectric resonator antenna in an embodiment disclosed
9 is a graph comparing S12 parameters when an electromagnetic bandgap (EGB) structure is used and when the MIMO antenna according to an embodiment of the present invention is not used.

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. The following detailed description is provided to aid in a comprehensive understanding of the methods, devices, and/or systems described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, when it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification. The terms used in the detailed description are only for describing embodiments of the present invention, and should not be limiting. Unless explicitly used otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as "comprising" or "feature" are intended to refer to certain features, numbers, steps, actions, elements, some or combination thereof, and one or more other than those described. It should not be construed to exclude the presence or possibility of other features, numbers, steps, actions, elements, any part or combination thereof.

Meanwhile, directional terms such as upper side, lower side, one side, and the other side are used in relation to the orientation of the disclosed drawings. Since the constituent elements of the embodiments of the present invention may be positioned in various orientations, the directional terminology is used for illustrative purposes, but is not limiting.

In addition, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

1 is a perspective view showing a dielectric resonator antenna according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a dielectric resonator antenna according to an embodiment of the present invention, and Figure 3 is a dielectric according to an embodiment of the present invention It is a plan view showing the lower surface of the substrate in the resonator antenna.

1 to 3, the dielectric resonator antenna 100 includes a substrate 102, a ground plane 104, a microstrip 106, a slot 108, a dielectric resonator 110, and a stand 112. It may include.

In an exemplary embodiment, the dielectric resonator antenna 100 has a resonant frequency band of 3.3 to 3.8 GHz and may be used for 5G communication. However, this is only one embodiment, and the resonant frequency band of the dielectric resonator antenna 100 is not limited thereto, and may be used in various frequency bands if necessary.

The substrate 102 may support the dielectric resonator antenna 100. The substrate 102 may be a dielectric material. For example, an FR-4 substrate may be used as the substrate 102, but is not limited thereto. In the substrate 102, a stand insertion hole 102a may be provided through the substrate 102. However, it is not limited thereto, and the stand insertion hole 102a may be provided in the form of a groove having a predetermined depth. In an exemplary embodiment, the substrate 102 may be provided in a rectangular plate shape.

The ground plane 104 may be provided on one surface of the substrate 102 (the upper surface of the substrate 102 in FIGS. 1 and 2 ). The ground plane 104 may be made of metal. The ground plane 104 may be provided in a region of the substrate 102 except for the stand insertion hole 102a.

The microstrip 106 may be provided on the other surface of the substrate 102 (the lower surface of the substrate 102 in FIGS. 1 and 2 ). The microstrip 106 may be provided with a predetermined width from one side of the substrate 102 toward the center of the substrate 102. One end of the microstrip 106 may be electrically connected to a coaxial cable (not shown). A feed signal may be applied to the microstrip 106. Herein, it has been described that the power supply unit is the microstrip 106, but is not limited thereto, and a transmission line such as a strip line or a coplanar waveguide (CPW) line may be used.

The slot portion 108 may be provided on the ground plane 104. That is, the slot unit 108 may be provided by partially removing the ground plane 104 from one surface of the substrate 102. The slot portion 108 may be provided at a central portion on one surface of the substrate 102. The slot portion 108 may include a circular slot 108a, a first arm slot 108b, and a second arm slot 108c. Through this, the slot unit 108 has a cross-ring slot (Cross-Ring Slot) structure.

The circular slot 108a may be provided in a central portion on one surface of the substrate 102. The circular slot 108a may be provided to be located above the other end of the microstrip 106. That is, the circular slot 108a formed on one surface of the substrate 102 may be provided to overlap the other end of the microstrip 106 formed on the other surface of the substrate 102.

The first arm slot 108b may be provided in the first direction from the outer peripheral surface of the circular slot 108a. In an exemplary embodiment, the first direction may be a direction connecting the upper right corner and the lower left corner of the substrate 102. The first arm slot 108b may include a 1-1 th arm slot 108b-1 and a 1-2 th arm slot 108b-2. The 1-1th arm slot 108b-1 may be provided toward the first corner (ie, the upper right corner) of the substrate 102 from the outer peripheral surface of the circular slot 108a. The 1-2 arm slot 108b-2 may be provided toward a second edge (i.e., the lower left edge) positioned in a direction opposite to the first edge of the substrate 102 on the outer peripheral surface of the circular slot 108a. have.

The second arm slot 108c may be provided in a direction perpendicular to the first direction on the outer peripheral surface of the circular slot 108a. In an exemplary embodiment, the second direction may be a direction connecting the upper left corner and the lower right corner of the substrate 102. The second arm slot 108c may include a 2-1 arm slot 108c-1 and a 2-2 arm slot 108c-2. The 2-1 arm slot 108c-1 may be provided toward the third corner (ie, the upper left corner) of the substrate 102 from the outer peripheral surface of the circular slot 108a. The 2-2 arm slot 108c-2 may be provided from the outer peripheral surface of the circular slot 108a toward a fourth corner (ie, the lower right corner) positioned in a direction opposite to the third corner of the substrate 102 .

Here, the 1-1 th arm slot 108b-1 and the 1-2 th arm slot 108b-2 may be provided symmetrically with respect to the center of the circular slot 108a. In addition, the 2-1 arm slot 108c-1 and the 2-2 arm slot 108c-2 may be provided symmetrically with respect to the center of the circular slot 108a. The first arm slot 108b may be provided with a length shorter than that of the second arm slot 108c.

The dielectric resonator 110 may be provided on one surface of the substrate 102. The dielectric resonator 110 may be provided on the slot 108. The dielectric resonator 110 may be excited by the microstrip 106 and the slot 108 to form a circular polarization field. In an exemplary embodiment, the dielectric resonator 110 may have a hexahedral shape. Cutting portions 110a may be provided at both corners of the dielectric resonator 110.

Here, the cut portions 110a may be formed at edges (ie, upper left corners and lower right corners) positioned in the second direction from the upper end of the dielectric resonator 110. The cutting part 110a may be provided by being cut to a predetermined depth at an edge located in the second direction from the top of the dielectric resonator 110. In an exemplary embodiment, the cutting portion 110a may be cut in a direction of 45 degrees to be provided.

In the disclosed embodiment, the first arm slot 108b and the second arm slot 108c are provided vertically in the circular slot 108a on one surface of the substrate 102, and cut portions at both upper corners of the dielectric resonator 110 By forming (110a), the dielectric resonator antenna 100 can have a broadband circular polarization, and thereby, an antenna having a wide axial ratio and a wide impedance bandwidth can be implemented.

The stand 112 may be inserted into the stand insertion hole 102a. The stand 112 may serve to fix the dielectric resonator 110 on the substrate 102. The stand insertion hole 102a may be formed at a position corresponding to a portion of the substrate 102 in the first direction from the lower end of the dielectric resonator 110 (ie, upper right corner and lower left corner).

The stand 112 has a shape corresponding to the stand insertion hole 102a. In an exemplary embodiment, the stand insertion hole 102a may have a triangular shape. That is, the stand insertion hole 102a may have a shape corresponding to the lower edge portions of the dielectric resonator 110.

The stand 112 may be made of a dielectric material. In an exemplary embodiment, the stand 112 may be made of the same dielectric material as the dielectric resonator 110. For example, the stand 112 may be integrally formed with the dielectric resonator 110, but is not limited thereto. The dielectric resonator 110 is fixed to the substrate 102 by the stand 112, and the stand 112 inserted and inserted into the insertion hole 102a may be fixed to the rear surface of the substrate 102 through an adhesive. That is, since the stand 112 is fitted and fixed in the stand insertion hole 102a, the dielectric resonator 110 can be fixed on the substrate 102 by the stand 112. Here, since the adhesive is not applied between the substrate 102 and the lower portion of the dielectric resonator 110 due to the stand 112, the dielectric resonator antenna 100 is not affected.

That is, when forming the dielectric resonator 110 on the ground plane 104 made of metal, if an adhesive is formed between the ground plane 104 and the dielectric resonator 110 and bonded, the ground plane 104 and the dielectric resonator An unwanted dielectric layer is formed by the adhesive between the (110). At this time, since the effective dielectric constant of the adhesive cannot be accurately known and the thickness of the adhesive cannot be accurately controlled, it is difficult to control the axial ratio and resonance frequency of the dielectric resonator antenna 100 as desired.

Accordingly, in the disclosed embodiment, by inserting the stand 112 made of a dielectric material into the stand insertion hole 102a, and bonding the stand 112 and the dielectric resonator 110 with an adhesive, the dielectric resonator antenna 100 It is possible to prevent adverse effects caused by.

4 is a diagram illustrating an electric field distribution of a dielectric resonator antenna according to an exemplary embodiment. Here, the electric field distribution is shown at the resonance frequency of 3.45 GHz.

4A to 4D, the electric field distribution of the dielectric resonator antenna 100 is set at 90° intervals (phase 0° (Fig. 4(a))) and phase 90° (Fig. 4(b)). It is represented by phase 180° (Fig. 4(c)), phase 270° (Fig. 4(d))). Here, it can be seen that the dielectric resonator antenna 100 has a circular polarization.

FIG. 5 is a graph comparing axial ratios when an adhesive is used between a ground plane and a dielectric resonator and a stand is used in the dielectric resonator antenna according to the exemplary embodiment disclosed in FIG. 5.

Referring to FIG. 5, when an adhesive (Glue) is used between the ground plane 104 and the dielectric resonator 110, the case where the axial ratio exceeds the reference value of 3 dB in the resonance frequency band (3.3 to 3.8 GHz) occurs. can see.

On the other hand, in the case of using the stand 112 (Stand), it can be seen that the axial ratio is formed to be less than the reference value of 3dB in the resonant frequency band (3.3 ~ 3.8GHz), and almost coincides with the ideal case.

Meanwhile, in the disclosed embodiment, a dielectric resonator antenna may be used as a multiple input multiple output (MIMO). In this case, an electromagnetic band gap (EBG) structure may be used to increase isolation between the dielectric resonator antennas.

6 is a plan view showing a MIMO antenna using a dielectric resonator according to an embodiment of the present invention. Here, a portion different from the embodiment shown in FIGS. 1 to 3 will be mainly described. Here, it is described as an example that there are two dielectric resonator antennas, but the present invention is not limited thereto, and the number of dielectric resonator antennas may include various other numbers.

6, the MIMO antenna 200 includes a substrate 202, a ground plane 204, a first microstrip 206-1, a second microstrip 206-2, and a first slot 208- 1), a second slot portion 208-2, a first dielectric resonator 210-1, a second dielectric resonator 210-2, and an isolation portion 214 may be included.

Here, the first microstrip 206-1, the first slot portion 208-1, and the first dielectric resonator 210-1 may form the first dielectric resonator antenna 200-1. In addition, the second microstrip 206-2, the second slot 208-2, and the second dielectric resonator 210-2 may form the second dielectric resonator antenna 200-2. Since the first dielectric resonator antenna 200-1 and the second dielectric resonator antenna 200-2 are the same as or similar to the embodiments shown in FIGS. 1 to 3, detailed descriptions thereof will be omitted.

An isolation part 214 may be provided between the first dielectric resonator antenna 200-1 and the second dielectric resonator antenna 200-2. The isolation unit 214 includes a first dielectric resonator antenna 200-1 and a second dielectric resonator antenna on one surface of the substrate 202 on which the first and second slots 208-1 and 208-2 are formed. It can be provided between (200-2).

The isolation unit 214 may include one or more unit isolation structures 214a. The unit isolation structures 214a may be arranged in a line along the substrate 202 on one surface of the substrate 202. Each unit isolation structure 214a may be provided through a ground plane 204 formed on one surface of the substrate 202. Each unit isolation structure 214a may form a pattern of a predetermined shape on one surface of the substrate 202.

A spaced slot 214b may be provided on one surface of the substrate 202 along an edge of each unit isolation structure 214a. The separation slot 214b may be provided by removing the ground plane 204 along the edge of each unit isolation structure 214a. The separation slot 214b may be spaced apart from each unit isolation structure 214a and the ground plane 204 by a predetermined distance.

The unit isolation structure 214a may be an electromagnetic band gap structure provided to form a band gap in the resonance frequency bands of the first dielectric resonator antenna 200-1 and the second dielectric resonator antenna 200-2. have. In this case, the degree of isolation between the first dielectric resonator antenna 200-1 and the second dielectric resonator antenna 200-2 can be improved.

7 is a diagram illustrating a unit isolation structure 214a in the disclosed embodiment. Referring to FIG. 7, the unit isolation structure 214a includes a first pattern 214a-1, a second pattern 214a-2, a third pattern 214a-3, a fourth pattern 214a-4, and It may include a fifth pattern 214a-5.

The first pattern 214a-1 may be provided in the center of the unit isolation structure 214a. In an exemplary embodiment, the first pattern 214a-1 may have a rectangular shape.

The second pattern 214a-2 may be provided at a first corner (eg, an upper right corner) of the first pattern 214a-1. In an exemplary embodiment, the second pattern 214a-2 may be connected to the first pattern 214a-1 and may have a rectangular shape. The second pattern 214a-2 may be provided with a size smaller than that of the first pattern 214a-1.

The third pattern 214a-3 may be provided at a second corner (eg, an upper left corner) of the first pattern 214a-1. In an exemplary embodiment, the third pattern 214a-3 may be connected to the first pattern 214a-1 and may have a rectangular shape. The third pattern 214a-3 may have a size smaller than that of the first pattern 214a-1.

The fourth pattern 214a-4 may be provided at a third corner (eg, a lower right corner) of the first pattern 214a-1. In an exemplary embodiment, the fourth pattern 214a-4 may be connected to the first pattern 214a-1 and may have a rectangular shape. The fourth pattern 214a-4 may be provided with a size smaller than that of the first pattern 214a-1.

The fifth pattern 214a-5 may be provided at a fourth corner (eg, a lower left corner) of the first pattern 214a-1. In an exemplary embodiment, the fifth pattern 214a-5 is connected to the first pattern 214a-1 and may be formed in a rectangular shape. The fifth pattern 214a-5 is more than the first pattern 214a-1. It can be provided in a small size.

A first stub 214a-6 may be provided between the second pattern 214a-2 and the third pattern 214a-3 by being connected to the first pattern 214a-1. The first stub 214a-6 may be provided to protrude from the second pattern 214a-2 and the third pattern 214a-3. A second stub 214a-7 may be provided between the second pattern 214a-2 and the fourth pattern 214a-4 by being connected to the first pattern 214a-1. The second stub 214a-7 may be provided to protrude from the second pattern 214a-2 and the fourth pattern 214a-4.

A third stub 214a-8 may be provided between the fourth pattern 214a-4 and the fifth pattern 214a-5 by being connected to the first pattern 214a-1. The third stub 214a-8 may be provided to protrude more than the fourth pattern 214a-4 and the fifth pattern 214a-5. A fourth stub 214a-9 may be provided between the fifth pattern 214a-5 and the third pattern 214a-3 by being connected to the first pattern 214a-1. The fourth stub 214a-9 may be provided to protrude from the fifth pattern 214a-5 and the third pattern 214a-3.

As shown in FIG. 8, the unit isolation structure 214a has a band gap in the resonant frequency band (3.3 to 3.8 GHz) of the first dielectric resonator antenna 200-1 and the second dielectric resonator antenna 200-2. Band Gap) is formed, so that the degree of isolation between the first dielectric resonator antenna 200-1 and the second dielectric resonator antenna 200-2 can be improved.

Here, since the unit isolation structure 214a is formed on the ground plane 204, a separate space area is not required. That is, according to the disclosed embodiment, it is possible to improve the degree of isolation between the two antennas 200-1 and 200-2 through the isolation unit 214 without increasing the size of the MIMO antenna 200.

9 is a graph comparing S12 parameters when an electromagnetic band gap (EGB) structure is used and when the MIMO antenna according to an embodiment of the present invention is not used.

Referring to FIG. 9, compared to the case where the electromagnetic bandgap (EGB) structure is not used, the resonance frequency bands of the first dielectric resonator antenna 200-1 and the second dielectric resonator antenna 200-2 (3.3 ~ 3.8GHz), it can be seen that the S12 parameter value is -25dB or less.

Although the exemplary embodiments of the present invention have been described in detail above, those of ordinary skill in the art to which the present invention pertains will understand that various modifications may be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should not be determined by the claims to be described later, but also by those equivalents to the claims.

100: dielectric resonator antenna
102: substrate
102a: stand insertion hole
104: ground plane
106: microstrip
108: slot
108a: circular slot
108b: first arm slot
108b-1: 1-1 arm slot
108b-2: 1-2 arm slot
108c: second arm slot
108c-1: 2-1 arm slot
108c-2: 2-2 arm slot
110: dielectric resonator
110a: cut
112: stand
200: MIMO antenna
202: substrate
204: ground plane
206-1: first microstrip
206-2: 2nd microstrip
208-1: first slot
208-2: second slot
210-1: first dielectric resonator
210-2: second dielectric resonator
214: isolation unit
214a: unit isolation structure
214a-1: first pattern
214a-2: second pattern
214a-3: third pattern
214a-4: fourth pattern
214a-5: fifth pattern
214a-6: first stub
214a-7: second stub
214a-8: 3rd stub
214a-9: fourth stub

Claims (20)

Board;
A ground plane provided on one surface of the substrate;
A feeding part provided on the other surface of the substrate;
A slot portion provided by removing the ground plane on one surface of the substrate and formed at a position corresponding to an end portion of the feed portion; And
Including a dielectric resonator provided on the slot on one surface of the substrate,
The slot part,
A circular slot formed on one surface of the substrate at a position corresponding to an end of the power supply unit;
A first arm slot provided in a first direction on an outer peripheral surface of the circular slot; And
A dielectric resonator antenna comprising a second arm slot provided in a second direction perpendicular to the first direction on an outer peripheral surface of the circular slot.
delete The method according to claim 1,
The first arm slot,
A 1-1 arm slot provided toward the first edge of the substrate from an outer peripheral surface of the circular slot; And
It includes a 1-2 arm slot provided toward a second edge positioned in a direction opposite to the first edge of the substrate on the outer peripheral surface of the circular slot,
The first-first arm slot and the first-second arm slot are provided symmetrically with respect to the center of the circular slot, a dielectric resonator antenna.
The method according to claim 1,
The second arm slot,
A 2-1 arm slot provided toward a third edge of the substrate on an outer circumferential surface of the circular slot; And
It includes a 2-2 arm slot provided toward a fourth edge located in a direction opposite to the third edge of the substrate on the outer peripheral surface of the circular slot,
The 2-1 arm slot and the 2-2 arm slot are provided symmetrically with respect to the center of the circular slot, a dielectric resonator antenna.
The method according to claim 1,
The first arm slot,
A dielectric resonator antenna provided to have a length shorter than that of the second arm slot.
The method according to claim 1,
The dielectric resonator has a hexahedral shape,
A dielectric resonator antenna comprising a cutting portion provided by cutting both edges at an upper end of the dielectric resonator to a predetermined depth.
The method of claim 6,
The cutting part,
A dielectric resonator antenna formed at both corners of the dielectric resonator in the second direction.
The method according to claim 1,
The dielectric resonator antenna,
A stand insertion hole formed in the substrate; And
The dielectric resonator antenna further comprising a stand inserted into the stand insertion hole and fixing the dielectric resonator.
The method of claim 8,
The dielectric resonator has a hexahedral shape,
The stand, the dielectric resonator antenna is bonded to both corners of the lower surface of the dielectric resonator.
Board;
A ground plane provided on one surface of the substrate;
A feeding part provided on the other surface of the substrate;
A stand insertion hole formed in the substrate;
A stand inserted into the stand insertion hole; And
A dielectric resonator antenna comprising a dielectric resonator provided on one surface of the substrate at a position corresponding to an end portion of the power supply unit and a lower surface fixed by the stand.
Board;
A ground plane provided on one surface of the substrate;
A first power feeding part provided on the other surface of the substrate;
A second feeding part provided to be spaced apart from the first feeding part on the other surface of the substrate;
A first dielectric resonator antenna provided on one surface of the substrate and fed by the first power supply unit;
A second dielectric resonator antenna provided on one surface of the substrate and fed by the second power supply unit; And
A MIMO antenna comprising an isolation part provided between the first dielectric resonator antenna and the second dielectric resonator antenna on one surface of the substrate.
The method of claim 11,
The first dielectric resonator antenna,
A first slot portion provided by removing the ground plane on one surface of the substrate and formed at a position corresponding to an end portion of the first power feeding portion; And
Including a first dielectric resonator provided on the first slot on one surface of the substrate,
The second dielectric resonator antenna,
A second slot portion provided by removing the ground plane on one surface of the substrate and formed at a position corresponding to an end portion of the second feeding portion; And
A MIMO antenna comprising a second dielectric resonator provided on the second slot on one surface of the substrate.
The method of claim 12,
Each of the first slot and the second slot,
A circular slot provided on one surface of the substrate;
A first arm slot provided in a first direction on an outer peripheral surface of the circular slot; And
A MIMO antenna comprising a second arm slot provided in a second direction perpendicular to the first direction on an outer peripheral surface of the circular slot.
The method of claim 13,
Each of the first dielectric resonator and the second dielectric resonator has a hexahedral shape,
A MIMO antenna comprising a cutting portion provided by cutting both edges of the first dielectric resonator and the second dielectric resonator to a predetermined depth.
The method of claim 11,
The isolation unit,
Including one or more unit isolation structures arranged along the substrate on one surface of the substrate,
The unit isolation structure is provided through the ground plane, MIMO antenna.
The method of claim 15,
The unit isolation structure,
An electromagnetic band gap structure provided to form a band gap in a resonant frequency band of the first dielectric resonator antenna and the second dielectric resonator antenna, a MIMO antenna.
The method of claim 15,
The isolation unit,
The ground plane from one surface of the substrate is provided by being removed along the edge of the unit isolation structure, and further comprising a spacing slot to separate the unit isolation structure from the ground plane.
The method of claim 15,
The unit isolation structure,
A first pattern;
A second pattern connected to the first edge of the first pattern and provided;
A third pattern connected to the second edge of the first pattern and provided;
A fourth pattern connected to the third edge of the first pattern and provided;
A fifth pattern connected to the fourth edge of the first pattern and provided;
A first stub connected to the first pattern between the second pattern and the third pattern;
A second stub connected to the first pattern between the second pattern and the fourth pattern;
A third stub connected to the first pattern between the fourth pattern and the fifth pattern; And
A MIMO antenna including a fourth stub connected to the first pattern between the fifth pattern and the third pattern.
Board;
A ground plane provided on one surface of the substrate;
A plurality of power feeding units spaced apart from each other on the other surface of the substrate;
A plurality of dielectric resonator antennas respectively fed by the plurality of power feeding units on one surface of the substrate; And
A MIMO antenna comprising at least one unit isolation structure provided between the plurality of dielectric resonator antennas on one surface of the substrate, arranged along the substrate, and formed through the ground plane.
A wireless communication device comprising the MIMO antenna according to any one of claims 11 to 19.

Images