KR102198286B1 - Antenna structure with improved isolation by routing - Google Patents

Abstract

An embodiment of the present invention relates to an antenna structure with improved isolation by routing, and a technical problem to be solved is to form a dual pole pattern by a routing technique of a printed circuit board, and a ground plan through a conductive via. It is to provide an antenna structure with improved isolation by connecting to.
To this end, the present invention provides a dielectric layer having an upper surface and a lower surface opposite to the upper surface; A first dual pole pattern formed on an upper surface of the dielectric layer by a routing technique; A first antenna formed to be spaced apart from one side of the first dual pole pattern; A second antenna formed to be spaced apart from the other side of the first dual pole pattern; A first ground plan formed on a lower surface of the dielectric layer; And a first ground via penetrating an upper surface and a lower surface of the dielectric layer to electrically connect the first dual pole pattern to the first ground plan.

Description

Antenna structure with improved isolation by routing}

An embodiment of the present invention relates to an antenna structure with improved isolation by routing.

The size of wireless communication devices is shrinking day by day with advances in technology. The devices need to be connected to hybrid networks for heterogeneous services such as Bluetooth, Wi-Fi, Zig-bee, and 4G/5G. Multimode, multi-band antennas are a basic requirement of present and future communication devices. In the MIMO antenna, antenna performance can be greatly degraded due to high mutual coupling caused by closely arranged antenna elements. Due to the shrinkage of the latest wireless devices, antenna performance must be improved even if the antennas are close to each other.

Various multi-mode antenna modules have been proposed for MIMO communication in different frequency bands. One of the drawbacks of small MIMO modules is that there is a mutual coupling between the input port and the antenna element, so the degree of isolation decreases and the antenna performance is degraded. Recently, a technology to improve the performance of the MIMO antenna by reducing the mutual coupling and increasing the isolation has been introduced. .

The above-described information disclosed in the background technology of the present invention is only for improving an understanding of the background of the present invention, and thus may include information not constituting the prior art.

A problem to be solved according to an embodiment of the present invention is to provide an antenna structure with improved isolation by routing. As an example, the problem to be solved according to an embodiment of the present invention is to provide an antenna structure with improved isolation by forming a dual pole pattern by a routing technique of a printed circuit board and connecting the dual pole pattern to a ground plan through a conductive via. It is in providing.

An antenna structure with improved isolation by routing according to an embodiment of the present invention includes: a dielectric layer having an upper surface and a lower surface opposite to the upper surface; A first dual pole pattern formed on an upper surface of the dielectric layer by a routing technique; A first antenna formed to be spaced apart from one side of the first dual pole pattern; A second antenna formed to be spaced apart from the other side of the first dual pole pattern; A first ground plan formed on a lower surface of the dielectric layer; And a first ground via penetrating the upper and lower surfaces of the dielectric layer and electrically connecting the first dual pole pattern to the first ground plan.

The first dual pole pattern includes a first square body pattern; A first extension pattern extending in a vertical direction from a first side of the first square body pattern and then bent in a horizontal direction; A second extension pattern extending in a vertical direction from a second side of the first square body pattern and then bent in a horizontal direction; A third extension pattern extending in a vertical direction from a third side of the first square body pattern and then bent in a horizontal direction; And a fourth extension pattern extending in a vertical direction from a fourth side of the first square body pattern and then bent in a horizontal direction.

The first and second antennas may be positioned outside the first and third extension patterns, respectively, or may be positioned outside the second and fourth extension patterns.

Each of the first and second antennas includes a feed rod extending in a vertical direction from the dielectric layer; A first radiator extending in a horizontal direction from the feed rod; And a second radiator spaced apart from the first radiator and extending in a horizontal direction from the feeding rod.

A second dual pole pattern formed on an upper surface of the dielectric layer spaced apart from the first dual pole pattern by a routing technique; A third antenna formed to be spaced apart from one side of the second dual pole pattern; A fourth antenna formed to be spaced apart from the other side of the second dual pole pattern; A second ground plan formed on the lower surface of the dielectric layer; And a second ground via penetrating the upper and lower surfaces of the dielectric layer to electrically connect the second dual pole pattern to the second ground plan.

The second dual pole pattern includes a second square body pattern; A first extension pattern extending in a vertical direction from a first side of the second square body pattern and then bent in a horizontal direction; A second extension pattern extending in a vertical direction from a second side of the second square body pattern and then bent in a horizontal direction; A third extension pattern extending in a vertical direction from a third side of the second square body pattern and then bent in a horizontal direction; And a fourth extension pattern extending in a vertical direction from the fourth side of the second square body pattern and then bent in a horizontal direction.

The third and fourth antennas may be positioned outside the first and third extension patterns, respectively, or may be positioned outside the second and fourth extension patterns.

The third and fourth antennas respectively include feed rods extending in a vertical direction from the dielectric layer; A first radiator extending in a horizontal direction from the feed rod; And a second radiator spaced apart from the first radiator and extending in a horizontal direction from the feeding rod.

An embodiment of the present invention provides an antenna structure with improved isolation through routing. For example, an embodiment of the present invention provides an antenna structure with improved isolation by forming a dual pole pattern by a routing technique of a printed circuit board and connecting the dual pole pattern to a ground plan through a conductive via.

1A and 1B are a perspective view and a plan view showing an antenna structure with improved isolation by routing according to an embodiment of the present invention, and FIG. 1C is a perspective view of a comparative example for comparing effects according to an embodiment of the present invention.
2A, 2B, and 2C are plan, perspective, and cross-sectional views illustrating an antenna structure with improved isolation by routing according to an embodiment of the present invention.
3A to 3D are graphs showing a voltage standing wave ratio (VSWR) of an antenna structure with improved isolation by routing according to an embodiment of the present invention.
4A and 4B are S21 comparison graphs and comparative data between Examples and Comparative Examples of the present invention.
5A and 5B are S43 comparison graphs and comparative data between Examples and Comparative Examples of the present invention.
6 is a diagram illustrating an example of frequency setting using a dual pole pattern in an antenna structure with improved isolation by routing according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more completely describe the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows. It is not limited to the examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete, and to completely convey the spirit of the present invention to those skilled in the art.

In addition, in the following drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description, and the same reference numerals refer to the same elements in the drawings. As used herein, the term "and/or" includes any and all combinations of one or more of the corresponding listed items. In addition, the meaning of "connected" in the present specification means not only the case where the member A and the member B are directly connected, but also the case where the member A and the member B are indirectly connected by interposing a member C between the member A and the member B. do.

The terms used in this specification are used to describe specific embodiments, and are not intended to limit the present invention. As used herein, the singular form may include the plural form unless the context clearly indicates another case. In addition, when used herein, "comprise, include" and/or "comprising, including" refers to the mentioned shapes, numbers, steps, actions, members, elements, and/or groups thereof. It specifies existence and does not exclude the presence or addition of one or more other shapes, numbers, actions, members, elements, and/or groups.

In this specification, terms such as first and second are used to describe various members, parts, regions, layers and/or parts, but these members, parts, regions, layers and/or parts are limited by these terms. It is self-evident. These terms are only used to distinguish one member, component, region, layer or portion from another region, layer or portion. Accordingly, the first member, part, region, layer or part to be described below may refer to the second member, part, region, layer or part without departing from the teachings of the present invention.

Terms relating to space such as “beneath”, “below”, “lower”, “above”, and “upper” are used in conjunction with an element or feature shown in the drawing. Other elements or features may be used for easy understanding. Terms related to this space are for easy understanding of the present invention according to various process conditions or use conditions of the present invention, and are not intended to limit the present invention. For example, if an element or feature in a figure is flipped over, the element or feature described as “bottom” or “below” becomes “top” or “above”. Thus, "below" is a concept encompassing "top" or "bottom".

1A and 1B are perspective views and plan views illustrating an antenna structure 100 with improved isolation by routing according to an embodiment of the present invention, and FIG. 1C is a perspective view of a comparative example for comparing effects according to an embodiment of the present invention. to be. In addition, FIGS. 2A, 2B and 2C are plan, perspective and cross-sectional views illustrating an antenna structure 100 with improved isolation by routing according to an exemplary embodiment of the present invention.

1A, 1B, 2A, 2B, and 2C, the antenna structure 100 with improved isolation according to an embodiment of the present invention includes a dielectric layer 110 and a first dual pole pattern 120 , A first antenna 130, a second antenna 140, a first ground plan 150, and a first ground via 160 may be included.

In addition, the antenna structure 100 with improved isolation according to an embodiment of the present invention includes a second dual pole pattern 170, a third antenna 180, a fourth antenna 190, and a second ground plan (not shown). And a second ground via (not shown). Here, in the case of the comparative example, the first dual pole pattern 120 and the second dual pole pattern 170 are not provided (see FIG. 1C ).

The dielectric layer 110 may include an approximately flat upper surface 111 and an approximately flat lower surface 112 that is an opposite surface to the upper surface 111. In some examples, the dielectric layer 110 may be in the form of an approximately flat plate. In some examples, the dielectric layer 110 has a high dielectric constant, alumina, zirconia, sialon, silicon carbide, a ceramic such as silicon nitride, polyimide (PI), polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), PBT. (polybutylene terephthalate), ASA (acrylonitrile-styrene-acrylate), PE (polyethylene), PET (polyethylene terephthalate), PP (polypropylene), a plastic resin such as FR-4, or a mixture thereof. The dielectric layer 110 may be designed to have a dielectric constant of about 10 to about 45 or more so that the performance of the antenna is improved.

In some examples, the dielectric layer 110 is a double-sided printed circuit board (printed wiring board), a multilayer printed circuit board, a flexible printed circuit board, a rigid printed circuit board, a soft/hard printed circuit board, paper phenolic, paper epoxy, glass epoxy. Laminated, bismalemide triazine, Teflon, ceramic, composite, build-up substrate, coreless substrate, or a mixture thereof.

The first dual pole pattern 120 may be formed on the upper surface 111 of the dielectric layer 110 by a routing technique. The first dual pole pattern 120 extends in a vertical direction from the first side of the first square body pattern 120a (approximately square shape) and the first square body pattern 120a, and is then bent in the horizontal direction. An extension pattern 121 (approximately a shape), a second extension pattern 122 extending vertically from the second side of the first square body pattern 120a and then bent in a horizontal direction, and a first square body pattern The third extension pattern 123 extending in the vertical direction from the third side of 120a and then bent in the horizontal direction, and extending in the vertical direction from the fourth side of the first square body pattern 120a and then in the horizontal direction. A bent fourth extension pattern 124 may be included. Here, the first, second, third, and fourth sides mean each of the four sides provided in the first square body pattern 120a, the vertical direction means a vertical direction (normal direction) with respect to the side, and the horizontal direction is It means the horizontal direction (parallel direction) to the side.

In addition, the routing technique refers to the step of preparing a substrate with copper foil formed on the surface, a drilling step of drilling a portion where a via is to be formed, a copper plating step for forming a pattern (signal pattern and ground pattern), and a front step of flattening the copper plating layer. , Dry film attaching step in which the dry film is in close contact with the copper plating layer, dry film exposure step, dry film development step, copper plating layer etching step exposed through the dry film, dry film peeling step, surface treatment step using a solder mask, etc. It refers to a technique of forming a desired pattern (dual pole pattern, ground plan, ground via, etc.). Of course, this routing technique is only an example, and various routing techniques may be performed according to the material or type of the substrate.

The first antenna 130 may be formed to be spaced apart from one side of the first dual pole pattern 120, and the second antenna 140 may be formed to be spaced apart from the other side of the first dual pole pattern 120. In some examples, the first and second antennas 130 and 140 may be formed (positioned) outside the first and third extension patterns 121 and 123, respectively. In some examples, the first and second antennas 130 and 140 may be formed (positioned) outside the second and fourth extension patterns 122 and 124. Also, in some examples, the first and second antennas 130 and 140 may resonate in the same frequency band.

In some examples, the first and second antennas 130 and 140 respectively extend from the first surface 111 of the dielectric layer 110 in a substantially vertical direction (normal direction), and the feed rods 131 and 141 are horizontal from the feed rods 131 and 141, respectively. It includes a first radiator 132, 142 (approximately disk shape) extending in the direction, and a second radiator 133, 143 (approximately disk shape) spaced apart from the first radiator 132 and 142 and extending in the horizontal direction from the feed rods 131 and 141 can do.

The first ground plan 150 may be formed on the lower surface 112 of the dielectric layer 110. In some examples, the area of the first ground plan 150 may be larger than the area of the first dual pole pattern 120.

The first ground via 160 penetrates the upper surface 111 and the lower surface 112 of the dielectric layer 110 to electrically connect (ground) the first dual pole pattern 120 to the first ground plan 150. I can.

In some examples, the first dual pole pattern 120, the first ground plan 150 and/or the first ground via 160 are copper, gold, platinum, silver, aluminum, nickel, palladium, chromium, alloys thereof, and It may be formed of any one selected from the equivalents. In addition, in some examples, the first dual pole pattern 120, the first ground plan 150 and/or the first ground via 160 are electroless plating, electroplating, sputtering, evaporation, chemical vapor deposition (CVD). , MOCVD (Metal Organic Chemical Vapor Deposition), PECVD (Plasma Enhanced CVD), ALD (Atomic Layer Deposition), PVD (Physical vapor Deposition), PLD (Pulsed Laser Deposition), L-MBE (Laser Molecular Beam Epitaxy), and equivalent methods It may be formed of any one selected from among. In addition, in some examples, the first dual pole pattern 120, the first ground plan 150 and/or the first ground via 160 is a printing and sintering process of a conductive ink, a plasma spraying process, or a room temperature vacuum spraying process. , May be formed by an aerosol deposition process, or the like. Moreover, in some examples, the first dual pole pattern 120, the first ground plan 150 and/or the first ground via 160 forge, punch, draw, cut the metal foil. After forming using a traditional processing method such as bending, it may be formed by bonding the dielectric layer 110 with an adhesive layer.

In some examples, the first and second antennas 130 and 140 may be formed of any one selected from copper, gold, platinum, silver, aluminum, nickel, palladium, chromium, alloys thereof, and equivalents thereof. In addition, in some examples, the first and second antennas 130 and 140 are forging, punching, drawing, and cutting metal foils. After forming by using a conventional processing method such as bending or a method of casting molten metal, it may be fixed by bonding to the dielectric layer 110.

In this way, an embodiment of the present invention can provide the antenna structure 100 with improved isolation through routing. For example, in an embodiment of the present invention, the first dual pole pattern 120 is formed by a routing technique of a printed circuit board, and the first dual pole pattern 120 is passed through the first conductive via. ), it is possible to provide the antenna structure 100 with improved isolation.

Meanwhile, as described above, the antenna structure 100 with improved isolation by routing according to the embodiment of the present invention includes the second dual pole pattern 170, the third and fourth antennas 180 and 190, and the second ground plan. (Not shown) and a second ground via (not shown), the shape and material of which are the first dual pole pattern 120, the first and second antennas 130 and 140, and the first ground plan 150 And the first ground via 160.

As an example, the second dual pole pattern 170 may be formed on the upper surface 111 of the dielectric layer 110 spaced apart from the first dual pole pattern 120 by a routing technique, and the third antenna 180 is The second dual pole pattern 170 may be formed to be spaced apart from one side, and the fourth antenna 190 may be formed to be spaced apart from the other side of the second dual pole pattern 170. In addition, the second ground plan may be formed on the lower surface 112 of the dielectric layer 110 spaced apart from the first ground plan 150. In some examples, the second ground plan may be electrically connected to or completely disconnected from the first ground plan 150. The second ground via may pass through the upper surface 111 and the lower surface 112 of the dielectric layer 110 to electrically connect the second dual pole pattern 170 to the second ground plan. Here, since the first ground plan and the second ground plan may have different ground potentials, an interference phenomenon between the first and second antennas and the third and fourth antennas related thereto may be prevented.

In some examples, the second dual pole pattern 170 extends in a vertical direction from the first side of the second square body pattern 170a and the second square body pattern 170a, and is then bent in the horizontal direction. The pattern 171 and a second extension pattern 172 that extends in a vertical direction from a second side of the second square body pattern 170a and then bent in a horizontal direction, and a second extension pattern 172 that is bent in a horizontal direction, and is vertical from the third side of the second square body pattern. A third extension pattern 173 that is extended in the horizontal direction and then bent in a horizontal direction, and a fourth extension pattern 174 that is bent in a horizontal direction after extending in the vertical direction from the fourth side of the second square body pattern. I can.

In some examples, the third and fourth antennas 180 and 190 may be positioned outside the first and third extension patterns 171 and 173, respectively. In addition, the third and fourth antennas 180 and 190 may be positioned outside the second and fourth extension patterns 172 and 174. Here, the third and fourth antennas 180 and 190 may have the same resonance frequency. In some examples, the resonance frequencies of the third and fourth antennas 180 and 190 may be different from the resonance frequencies of the first and second antennas 130 and 140.

In some examples, the third and fourth antennas 180 and 190 may each include a feed rod extending in a vertical direction from the first surface 111 of the dielectric layer 110, a first radiator extending in a horizontal direction from the feed rod, and a first radiator. It may include a second radiator spaced apart and extending in a horizontal direction from the feed rod.

In the drawings, reference numeral 199 denotes a base member on which the antenna structure 100 according to the present invention is mounted. A housing (not shown) is coupled to the base member to protect the antenna structure 100 from an external environment. In addition, in FIG. 1B, ① denotes the first antenna 130, ② denotes the second antenna 140, ③ denotes the third antenna 180, and ④ denotes the fourth antenna 190.

In this way, an embodiment of the present invention can provide the antenna structure 100 with improved isolation through routing. As an example, according to an embodiment of the present invention, the first and second dual pole patterns 120 and 170 are formed by a routing technique of a printed circuit board, and the first and second dual pole patterns 120 and 170 are respectively formed by first and second ground vias. The antenna structure 100 with improved isolation may be provided by connecting it to the first and second ground plans through.

In addition, the antenna structure 100 according to an embodiment of the present invention implements a MIMO function, while reducing interference between antennas, so that a plurality of antennas can be formed in a narrow space.

3A to 3D are graphs showing a voltage standing wave ratio (VSWR) of the antenna structure 100 with improved isolation by routing according to an embodiment of the present invention.

Here, the X-axis is the frequency, and the Y-axis is the height of a standing wave. In addition, Port 1 of Fig. 3A is the first antenna 130, Port 2 of Fig. 3B is the second antenna 140, Port 3 of Fig. 3C is the third antenna 180, and Port 4 of Fig. 3D is It means the fourth antenna 190,

3A and 3B, in the case of the first and second antennas 130, 140, the VSWR is relatively low (close to 1) at about 3420 MHz to about 3700 MHz, and also shown in FIGS. 3C and 3D. As shown, in the case of the third and fourth antennas 180 and 190, it can be seen that the VSWR is relatively low (nearly 2) at approximately 5850 MHz to 5925 MHz.

Therefore, the first and second antennas 130 and 140 and the third and fourth antennas 180 and 190 resonating in different frequency bands in the antenna structure 100 according to the present invention have high isolation, so that reflectance is low and impedance matching is good. Able to know.

4A and 4B are S21 comparison graphs and comparative data between Examples and Comparative Examples of the present invention. Here, in FIG. 4A, the X-axis is the frequency, and the Y-axis is the S21 parameter (dB).

As shown in FIGS. 4A and 4B, it can be seen that the S21 and VSWR of the present invention are improved compared to the comparative example in the case of the first and second antennas 130 and 140. For example, the present invention at a frequency of 3420 MHz improved VSWR by 6.77 compared to the comparative example, the present invention at a frequency of 3500 MHz improved VSWR by 9.56 compared to the comparative example, and at a frequency of 3600 MHz, the present invention compared to the comparative example It can be seen that the VSWR is improved by 8.65 and the VSWR is improved by 2.88 compared to the comparative example in the present invention at a frequency of 3700 MHz.

5A and 5B are S43 comparison graphs and comparative data between Examples and Comparative Examples of the present invention. Here, in FIG. 5A, the X-axis is the frequency, and the Y-axis is S43 parameter (dB).

As shown in FIGS. 5A and 5B, it can be seen that the S43 and VSWR of the present invention are improved compared to the comparative example in the case of the third and fourth antennas 180 and 190. As an example, the present invention at a frequency of 5850 MHz improved VSWR by 4.54 compared to the comparative example, the present invention at a frequency of 5880 MHz improved VSWR by 4.13 compared to the comparative example, and at a frequency of 5890 MHz, the present invention compared to the comparative example It can be seen that the VSWR is improved by 3.72, and the VSWR is improved by 1.92 compared to the comparative example in the present invention at a frequency of 5925 MHz.

In this way, the antenna structure 100 according to the embodiment of the present invention has dual pole patterns and ground plans formed on both sides of the printed circuit board centering on the dielectric layer, and they are connected to each other through ground vias, so that there is no interference between antennas. Accordingly, it is possible to improve the isolation between antennas in a narrow space.

6 is a diagram illustrating an example of frequency setting using a dual pole pattern in an antenna structure with improved isolation by routing according to an embodiment of the present invention.

6, the embodiment of the present invention is the length of the extension pattern (①, or the length of one side of the square body pattern) of the dual pole pattern, the length of the slot formed between the square body pattern and the extension pattern (②) ) And/or by adjusting the width (③) of the slot formed between the square body pattern and the extension pattern, it is possible to set the resonance frequency. Accordingly, according to an embodiment of the present invention, by properly designing the design of the dual pole pattern, it is possible to easily set the resonance frequency to be used.

What has been described above is only one embodiment for implementing an antenna structure with improved isolation by routing according to the present invention, and the present invention is not limited to the above-described embodiment, as claimed in the following claims. As such, without departing from the gist of the present invention, anyone of ordinary skill in the field to which the present invention pertains will have the technical spirit of the present invention to the extent that various changes can be implemented.

100; Antenna structure according to an embodiment of the present invention
110; Dielectric layer 111; Top
112; If 120; 1st dual pole pattern
120a; First square body pattern 121; 1st extension pattern
122; Second extension pattern 123; 3rd extension pattern
124; Fourth extension pattern 130; 1st antenna
131; Feed rod 132; First emitter
133; Second emitter 140; 2nd antenna
150; First ground plan 160; 1st ground via
170; A second dual pole pattern 180; 3rd antenna
190; Fourth antenna 199; Base member

Claims (8)

A dielectric layer having an upper surface and a lower surface opposite to the upper surface;
A first dual pole pattern formed on an upper surface of the dielectric layer by a routing technique;
A first antenna formed to be spaced apart from one side of the first dual pole pattern;
A second antenna formed to be spaced apart from the other side of the first dual pole pattern;
A first ground plan formed on a lower surface of the dielectric layer; And
And a first ground via penetrating the upper and lower surfaces of the dielectric layer and electrically connecting the first dual pole pattern to the first ground plan,
The first dual pole pattern
A first square body pattern;
A first extension pattern extending in a vertical direction from a first side of the first square body pattern and then bent in a horizontal direction;
A second extension pattern extending in a vertical direction from a second side of the first square body pattern and then bent in a horizontal direction;
A third extension pattern extending in a vertical direction from a third side of the first square body pattern and then bent in a horizontal direction; And
An antenna structure with improved isolation by routing including a fourth extension pattern that is extended in a vertical direction from a fourth side of the first square body pattern and then bent in a horizontal direction. delete The method of claim 1,
The first and second antennas are positioned outside the first and third extension patterns, respectively, or positioned outside the second and fourth extension patterns, respectively, with improved isolation by routing. The method of claim 1,
The first and second antennas are respectively
A feed rod extending in a vertical direction from the dielectric layer;
A first radiator extending in a horizontal direction from the feed rod; And
An antenna structure with improved isolation by routing, comprising a second radiator spaced apart from the first radiator and extending in a horizontal direction from the feed rod. The method of claim 1,
A second dual pole pattern formed on an upper surface of the dielectric layer spaced apart from the first dual pole pattern by a routing technique;
A third antenna formed to be spaced apart from one side of the second dual pole pattern;
A fourth antenna formed to be spaced apart from the other side of the second dual pole pattern;
A second ground plan formed on the lower surface of the dielectric layer; And
An antenna structure with improved isolation by routing, further comprising a second ground via penetrating the upper and lower surfaces of the dielectric layer and electrically connecting the second dual pole pattern to the second ground plan. The method of claim 5,
The second dual pole pattern
A second square body pattern;
A first extension pattern extending in a vertical direction from a first side of the second square body pattern and then bent in a horizontal direction;
A second extension pattern extending in a vertical direction from a second side of the second square body pattern and then bent in a horizontal direction;
A third extension pattern extending in a vertical direction from a third side of the second square body pattern and then bent in a horizontal direction; And
An antenna structure having improved isolation by routing, comprising a fourth extension pattern extending in a vertical direction from a fourth side of the second square body pattern and then bent in a horizontal direction. The method of claim 6,
The third and fourth antennas are positioned outside the first and third extension patterns, respectively, or positioned outside the second and fourth extension patterns, respectively, with improved isolation by routing. The method of claim 5,
Each of the 3rd and 4th antennas
A feed rod extending in a vertical direction from the dielectric layer;
A first radiator extending in a horizontal direction from the feed rod; And
An antenna structure with improved isolation by routing, comprising a second radiator spaced apart from the first radiator and extending in a horizontal direction from the feed rod.

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