KR102035333B1 - Dual band loop antenna - Google Patents

Dual band loop antenna Download PDF

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Publication number
KR102035333B1
KR102035333B1 KR1020160021809A KR20160021809A KR102035333B1 KR 102035333 B1 KR102035333 B1 KR 102035333B1 KR 1020160021809 A KR1020160021809 A KR 1020160021809A KR 20160021809 A KR20160021809 A KR 20160021809A KR 102035333 B1 KR102035333 B1 KR 102035333B1
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KR
South Korea
Prior art keywords
substrate
curved portion
curvature
curved
dual band
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KR1020160021809A
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Korean (ko)
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KR20170099566A (en
Inventor
최학근
박재성
오정훈
Original Assignee
한국전자통신연구원
단국대학교 천안캠퍼스 산학협력단
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Priority to KR1020160021809A priority Critical patent/KR102035333B1/en
Publication of KR20170099566A publication Critical patent/KR20170099566A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

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  • Details Of Aerials (AREA)

Abstract

The present invention provides a first substrate including a substrate having a circular shape, the substrate being disposed on a first surface, and having at least one first feed part having an arc shape branched with respect to the first body part and the first body part. A second feeder disposed on a feed line and a second surface of the substrate opposite to the first surface, and including a second body portion and at least one second feed portion having an arc shape branched with respect to the second body portion; A feed line, wherein the first feed part is connected to the first body part, a first curved part having a first curvature, a second curved part having a second curvature different from the first curvature, and the first curved part; The present invention provides a dual band loop antenna including a first connection portion connecting two curved portions.

Description

Dual band loop antenna {DUAL BAND LOOP ANTENNA}

The present invention relates to a dual band loop antenna, and more particularly, to a dual band loop antenna having a feed line having an arc shape.

With the development of wireless communication technology, there is a limitless method of utilizing a wireless local area network (WLAN) that can replace the function of a wired LAN.

Since WLANs do not require cables, WLAN devices can be used while moving and placed anywhere.

As a result, WLAN devices must be designed to be small in size, making them easier to carry around and easier to install in any location. As shown in the IEEE 802.11 standard, WLAN requires a dual band antenna for use in the 2.4GHz (2.4 ~ 2.48GHz) and 5GHz (5.15 ~ 5.825GHz) bands. In order to satisfy this demand, researches are being conducted to design antennas using devices having different sizes. Monopole antennas using two different rectangular elements, patch antennas using two L-shaped slots of different sizes, and monopole antennas satisfying the 5GHz band by adding small parasitic elements to the 2.4GHz band element.

In addition, the antenna for use in the WLAN should be small in volume with omnidirectional radiation so that it can communicate in any location. In order to solve the constraints in order to satisfy such a demand, there is a loop antenna having a non-directional pattern in a horizontal plane using a single substrate. However, loop antennas are very difficult to match impedance with low radiation resistance and high reactance.

Recently, various studies to solve this difficulty have been conducted for the antenna to reduce the volume of the antenna and satisfy the dual band or broadband.

An object of the present invention relates to a dual band loop antenna, and more particularly, to provide a dual band loop antenna having a feed line having an arc shape.

The dual band loop antenna according to the present invention includes a substrate having a circular shape, the substrate being disposed on a first surface, and having at least one first class having an arc shape branched from a first body part and the first body part. At least one second feeder disposed on a first feed line including all and a second face of the substrate opposite to the first face, and having an arc shape branched from the second body part and the second body part; And a second feed line including all, wherein the first feed part is connected to the first body part, a first curved part having a first curvature, and a second having a second curvature different from the first curvature. It may include a curved portion and a first connecting portion connecting the first and second curved portions.

Here, the first curvature may be greater than the second curvature.

The first curved portion may be formed to have a first width, and the second curved portion may be formed to have a second width smaller than the first width.

The first width may be 1.5 times to 2 times the second width.

The width of the first connection portion may be the same as the first width.

The outer side of the first curved portion is spaced apart from the center of the substrate by a first distance in a first direction, and the outer side of the second curved portion is spaced apart from the center of the substrate by a second distance in the first direction. The second distance may be 1.5 times to 2 times the first distance.

The first feed line may be formed to be asymmetrical with the second feed line based on the substrate.

The first feed part may further include a first branch part branched at a predetermined angle from the first connection part at an intersection area between the first curved part and the first connection part.

The width of the first branch portion may be 0.6 to 0.8 times the width of the first curved portion.

The second feed line is connected to the second main body, and has a third curved portion having a third curvature, a fourth curved portion having a fourth curvature different from the third curvature, and the third and fourth curved portions. It may include a second connecting portion.

The third curved portion may have the same size as the first curved portion, and the fourth curved portion may have the same size as the second curved portion.

The first feed part further includes a first branch part branched at a predetermined angle from the first connection part at an intersection area between the first curved part and the first connection part, and the second feed part includes the third In an intersecting region between the curved portion and the second connection portion, the second branch portion may be further branched at a predetermined angle with the second connection portion.

The second branch part may overlap at least a portion of the first branch part with the substrate interposed therebetween.

 The dual band loop antenna according to the present invention has a wide frequency band in the 5 GHz band in the overlapped areas of the first and second feed lines, satisfies the band characteristics in the 2.4 GHz band, and is simple to design on one substrate. Thereby, there is an advantage that can be located in a small space.

1 is a perspective view and a cross-sectional view of a dual band loop antenna according to the present invention from above.
2 is a view showing the first and second surfaces of the dual band loop antenna of the present invention.
3 is a diagram illustrating a current distribution of a dual band loop antenna according to the present invention.
4 is a diagram illustrating a voltage standing wave ratio (VSWR) according to a loop deformation of a dual band loop antenna according to the present invention.
5 is a diagram illustrating measured VSWR (Voltage Standing Wave Ratio) of the dual band loop antenna according to the present invention.
6 is a diagram illustrating a radiation pattern of a dual band loop antenna according to the present invention.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same elements in the drawings, and redundant description of the same elements is omitted.

1 is a perspective view and a cross-sectional view of a dual band loop antenna according to the present invention, and FIG. 2 is a view showing first and second surfaces of the dual band loop antenna of the present invention.

1 and 2, the dual band loop antenna 100 may include a substrate 110 and first and second feed lines 130 and 150.

First, FIG. 2 (a) shows a first side of a dual band loop antenna, and FIG. 2 (b) shows a second side of a dual band antenna.

The substrate 110 may be a dielectric substrate, for example, a substrate made of FR-4.

In an embodiment, the substrate 110 is described as FR-4 material, but is not limited thereto.

The substrate 110 may have a radius of 50 mm to 52 mm and a thickness of 1.5 mm to 1.7 mm based on the center. That is, the substrate 110 can minimize the size in the dual band, for example, 2.45GHz and 5.5GHz band.

The first feed line 130 may be formed on the first surface of the substrate 110, and may include a first main body 132 and four first feed units 136. Here, the first main body 132 and the four first feed portion 136 is described as being integrally formed, but the first main body 132 and the four first feed portion 136 are formed to be separated from each other May be used without limitation.

The first body part 132 may be disposed at the center of the substrate 110, and each of the four first feed parts 136 may be 0 °, 90 °, or 180 ° with respect to the first body part 132. And branched in four directions of 270 °, and may have an arc shape.

In an embodiment, the four first feed unit 136 is described as being formed in the same size with each other, but is not limited thereto.

The first feed part 136 is connected to the first main body 132, the first curved portion 140 having a first curvature, the second curved portion 142 having a second curvature different from the first curvature. And a first connection part 144 connecting the first and second curved parts 140 and 142.

That is, the first curved portion 140 is connected to one side of the first body portion 132 and may have a half arc shape.

In this case, the first curvature of the first curved portion 140 may be greater than the second curvature of the second curved portion 142.

That is, the first curved portion 140 has the first curvature greater than the second curvature so that the size of the circle formed to extend is smaller than the size of the circle formed by the second curved portion 142. can do.

In this case, the first width w1 of the first curved portion 140 may be 3.1 mm to 3.3 mm, and the current distribution is lowered when the first curved portion 140 is larger or narrower than 3.1 mm to 3.3 mm, thereby for the 2.45GHz and 5.5GHz bands. Characteristics may be lowered.

In addition, the outer side of the first curved portion 140 may be in any first direction, that is, the center of the first body portion 132 or the center of the substrate 110, or the substrate ( In the center of the 110 may be spaced apart from the first distance (d1) in the direction extending to the corner of the first body portion 132.

The first distance d1 may be 13 mm to 15 mm and may prevent current loss in the 2.45 GHz and 5.5 GHz bands.

The first connecting portion 144 is connected between the first and second curved portions 140 and 142 and may have a third width w3.

In this case, the third width w3 may be the same as the first width w1, but the present invention is not limited thereto.

In addition, the first connecting portion 144 may extend from the first curved portion 140 in a direction perpendicular to one side of the first body portion 132.

In the embodiment, the first connection portion 144 has been described as being uniformly formed with a third width w3, but has a third width w3 at the connection portion of the first curved portion 140, the second curved portion The connection portion 142 may have a width smaller than the third width w3, but is not limited thereto.

The second curved portion 142 may be formed with the second curvature at the first connection portion 144.

In this case, the side surfaces of the second curved portion 142 may be formed to be spaced apart from each other by the same distance from the adjacent side surfaces of the substrate 110.

The second width w2 of the second curved portion 142 may be formed to be narrower than the first width w1 and may be 2.0 mm to 2.2 mm.

In this case, the outer side of the second curved portion 142 may be in any first direction, that is, the center of the first body portion 132 or the center of the substrate 110, or the center of the first body portion 132. In the center of the 110 may be spaced apart from the second distance (d2) in the direction extending to the corner of the first body portion 132.

The second distance d2 may be 21 mm to 22 mm, and current loss may be prevented in the 2.45 GHz and 5.5 GHz bands.

In addition, the first feed part 136 is branched at a predetermined angle with the first connection part 144 at the intersection between the first curved part 140 and the first connection part 144 at the first branch part 146. It may further include.

Here, the fourth width w4 of the first branch portion 146 may be 0.6 times to 0.8 times the first width w1, and less than 0.6 times the first width w1 of the second feed line 150. When the portion overlaps with the lower portion and is larger than 0.8 times the first width w1, current may be prevented from flowing to the second curved portion 142 through the first connection portion 144.

In addition, the length of the first branch portion 146 is a length that may partially overlap the second branch portion 166 included in the second feed line 150 to be described later, and included in the second feed line 150. It may have a length that does not overlap with the third curved portion 162.

The second feed line 150 may be formed on a second surface opposite to the first surface of the substrate 110 and may include a second body portion 152 and four second feed portions 156.

The second feed line 150 may be formed asymmetrically with the first feed line 130 described above, but is not limited thereto.

Here, the second main body 152 and the four second feed portion 156 is described as being integrally formed, but the second main body 152 and the four second feed portion 156 is formed to be separated from each other. May be used without limitation.

The second main body 152 may be disposed at the center of the substrate 110, and each of the four second feeders 156 may be 0 °, 90 °, or 180 ° from each other based on the second main body 152. And branched in four directions of 270 °, and may have an arc shape.

In the embodiment, the four second feed unit 156 is described as being formed in the same size with each other, but is not limited thereto.

The second feeder 156 is connected to the second main body 152 and has a third curved portion 160 having a third curvature and a fourth curved portion 162 having a fourth curvature different from the third curvature. And a second connector 164 connecting the third and fourth curved portions 160 and 162.

That is, the third curved portion 160 is connected to one side of the second body portion 152 and may have a half arc shape.

In this case, the third curvature of the third curved portion 160 may be greater than the fourth curvature of the fourth curved portion 162.

That is, the third curved portion 160 may have the third curvature greater than the fourth curvature so that the size of the extended circle is smaller than the size of the circle formed by the fourth curved part 162. can do.

At this time, the third curved portion 160 may be 3.1 mm to 3.3 mm, the same as the first width (w1) of the first curved portion 140, the current distribution is lowered when larger or narrower than 3.1 mm to 3.3 mm As a result, characteristics for the 2.45 GHz and 5.5 GHz bands may be lowered.

In addition, the outer side of the third curved portion 160 may be in any first direction, that is, the center of the second main body 152 or the center of the substrate 110, or the center of the second main body 152. In the center of the 110 may be spaced apart from the first distance (d1) in the direction extending to the corner of the second body portion 152.

The first distance d1 may be 13 mm to 15 mm and may prevent current loss in the 2.45 GHz and 5.5 GHz bands.

The second connector 164 is connected between the third and fourth curved portions 160 and 162 and may be formed to have the same width as the third width w3 of the first connector 144.

In addition, the second connection portion 164 may extend from the third curved portion 160 in a direction perpendicular to one side of the second body portion 152.

In the embodiment, the second connection portion 164 has been described as being uniformly formed with a third width w3, but has a third width w3 at the connection portion of the third curved portion 160, the fourth curved portion The connection portion 162 may have a width smaller than the third width w3, but is not limited thereto.

The fourth curved portion 162 may be formed with the fourth curvature at the second connection portion 164.

In this case, the side surfaces of the fourth curved portion 162 may be formed to be spaced apart from each other by the same distance from the adjacent side surfaces of the substrate 110.

The fourth curved portion 162 may be formed to be narrower than the first width w1 in the same manner as the second width w2 of the second curved portion 142, and may be 2.0 mm to 2.2 mm.

At this time, the outer side of the fourth curved portion 162 is based on the center of the second body portion 152 or the center of the substrate 110 in any first direction, that is, the center of the second body portion 152 or the substrate ( In the direction extending from the center of the 110 to the edge of the second body portion 152 may be spaced apart from the above-described second distance (d2).

In addition, the second feeder 156 is branched at a predetermined angle with the second connector 164 at the intersection between the third curved portion 160 and the second connector 164 at the second branch 166. It may further include.

Here, the second branch portion 166 may be formed to have a fourth width w4 in the same manner as the first branch portion 146, may be 0.6 times to 0.8 times the first width w1, and may have a first width. If less than 0.6 times compared to the w1, the portion overlapping with the second feed line 150 is lowered, and when larger than 0.8 times compared to the first width w1, the current is curved through the second connecting portion 164. May interfere with flow to portion 162.

In addition, the length of the second branch portion 166 may be a length that may partially overlap the first branch portion 146 described above, and may be a length that does not overlap the first curved portion 142.

The second surface of the substrate 110 may be coupled to the connector 180 for supplying power by supplying power to the first and second feed lines 130 and 150, but is not limited thereto.

3 is a diagram illustrating a current distribution of a dual band loop antenna according to the present invention.

Fig. 3 (a) shows the current distribution at 2.45 GHz, and Fig. 3 (b) shows the current distribution at 5.5 GHz.

3 (a) and 3 (b) are formed to overlap at least a portion of the second curved portion 142 of the first feed line 130 and the fourth curved portion 162 of the second feed line 150. do.

3 (a) and 3 (b), the dual band loop antenna includes the first and third curved portions 140 and 160 and the first and third curves of the first and second feed lines 130 and 150, respectively. Two branches 146 and 166 may form an inner loop, and second and fourth curved portions 142 and 162 may form an outer loop.

Here, the overlapping regions of the first and second branch portions 146 and 166 allow current to flow in the 5.5 GHz band, and the overlapping regions of the second and fourth curve portions 142 and 146 allow current to flow in the 2.45 GHz band. To help.

3 (a) shows a current distribution at 2.45 GHz, in which currents flowing through the inner loop and the outer loop have a constant direction.

3 (b) shows a current distribution at 5 GHz, in which currents flowing through the inner loop and the outer loop have a constant directionality.

However, the current distributions of FIGS. 3A and 3B are formed in different directions, and the current flowing through the outer loop is weaker than the current flowing through the inner loop.

4 is a diagram illustrating a voltage standing wave ratio (VSWR) according to a loop deformation of a dual band loop antenna according to the present invention.

4 shows an inner loop having an overlapping region of the first and second connectors 146 and 166 of the present invention, and a double band in which the second and fourth curved portions 142 and 162 form an outer loop having an overlapping region. An antenna having only an inner loop and an outer loop without a loop antenna, an overlapping area of the first and second connection parts 146 and 166 and an overlapping area of the second and fourth curve parts 142 and 162, and a first and second connection part 146, Change in VSWR for an antenna in which an inner loop having an overlapping region of 166 and an outer loop without overlapping regions of the second and fourth curved portions 142 and 162 are formed.

That is, referring to FIG. 4, it can be seen that an antenna composed of only the inner loop and the outer loop has a resonance point at 5 GHz based on VSWR 2: 1 or less, and has an 8% bandwidth at 4.8 to 5.2 GHz.

In addition, it can be seen that an antenna having an inner loop having an overlapping area of the first and second connection parts 146 and 166 like the dual band antenna of the present invention has a bandwidth of 15.5% at 5.05 to 5.9 GHz. However, the antenna in this case does not exhibit resonance characteristics in the 2.45 GHz band.

However, the dual band antenna of the present invention forms an inner loop having an overlapping area of the first and second connection parts 146 and 166 and an outer loop having an overlapping area of the second and fourth curved parts 142 and 162, thereby forming 2.35. It can be seen that it has a 6.9% bandwidth at ~ 2.52 GHz and 15.6% at 5 ~ 5.85 GHz.

5 is a diagram illustrating measured VSWR (Voltage Standing Wave Ratio) of the dual band loop antenna according to the present invention.

5 shows measured and calculated values according to the fabricated dual band loop antenna VSWR characteristic.

Here, as a result of comparing the measured and calculated values for the VSWR characteristic, the dual band loop antenna shows the antenna performance that can be used in the WLAN band because VSWR 2: 1 or less is satisfied in the 2.45 Hz and 5 GHz bands. .

6 is a diagram illustrating a radiation pattern of a dual band loop antenna according to the present invention.

FIG. 6 shows the calculated electric field Calculated_E, the measured electric fieldMeasured_E, the calculated electric field of the horizontal pattern Calculated_H and the electric field of the measured horizontal patternMadesured_H for the dual band loop antenna.

Here, FIG. 6 (a) shows that the inner rope and the outer loop have the same current direction in the 2.45 GHz band, and the radiation characteristics of the loop antenna are similar to those of the loop antenna.

In addition, it can be seen from FIG. 6 (b) that the inner rope and the outer loop have the same current direction in the 5.4 GHz band, and have a radiation characteristic similar to that of the loop antenna.

The dual band loop antenna according to the present invention represents an omni-directional horizontally polarized antenna for use in the WLAN band, and constitutes an inner loop and an outer loop using two first, second curved portions and third and fourth curved portions, and It has a structure in which an overlapping region overlapping the curved portion is added.

This structure is similar to the two alford loop antennas of different sizes and has a characteristic of satisfying the dual band of 2.4GHz / 5GHz.

Since the dual band loop antenna according to the present invention has a radiation characteristic similar to that of the alford loop antenna, it has an omnidirectional radiation characteristic in a horizontal plane, and because it uses a single dielectric substrate, it can be structurally thin and simple.

Although described with reference to the above embodiments, those skilled in the art will understand that various modifications and changes can be made without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (9)

A substrate having a circular shape;
A first feed line disposed on the first surface of the substrate and including at least one first feed part having an arc shape branched with respect to the first main body part; And
A second feed line disposed on a second surface of the substrate opposite to the first surface, the second feed line including a second body portion and at least one second feed portion having an arc shape branched from the second body portion; Including,
The first feeder,
A first curved portion connected to the first body portion and having a first curvature;
A second curved portion having a second curvature different from the first curvature; And
A first connection part connecting the first and second curve parts;
The outer side of the first curved portion,
Spaced at a first distance in an arbitrary first direction from the center of the substrate,
The outside of the second curved portion,
And a second band spaced apart from the center of the substrate by a second distance in the first direction. The method according to claim 1,
The first curvature is,
A dual band loop antenna greater than the second curvature. The method according to claim 1,
The second distance is,
A dual band loop antenna of 1.5 times to 2 times the first distance. The method according to claim 1,
The first feed line,
The dual band loop antenna formed to be asymmetrical with the second feed line based on the substrate. The method according to claim 1,
The first feeder,
And a first branch part branched at a predetermined angle from the first connection part at an intersection area between the first curved part and the first connection part. The method according to claim 1,
The second feed line,
A third curved portion connected to the second body portion and having a third curvature;
A fourth curved portion having a fourth curvature different from the third curvature; And
And a second connection part connecting the third and fourth curve parts. The method according to claim 6,
The third curved portion,
Same size as the first curved portion,
The fourth curved portion,
A dual band loop antenna having the same size as the second curved portion. The method according to claim 6,
The first feeder,
And a first branch part branched at a predetermined angle from the first connection part at an intersection area between the first curved part and the first connection part,
The second feeder,
And a second branch part branched at a predetermined angle from the second connection part at an intersection area between the third curved part and the second connection part. The method according to claim 8,
The second branch portion,
And at least a portion of said first band overlapping said substrate with said substrate interposed therebetween.
KR1020160021809A 2016-02-24 2016-02-24 Dual band loop antenna KR102035333B1 (en)

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Citations (4)

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JP2007116519A (en) 2005-10-21 2007-05-10 Japan Radio Co Ltd Loop antenna
KR101169932B1 (en) 2010-09-10 2012-07-30 주식회사 이엠따블유 Multi band mimo antenna
US20140118211A1 (en) * 2012-10-25 2014-05-01 Henry Cooper Omnidirectional 3d antenna
US20150349418A1 (en) * 2012-12-21 2015-12-03 Drexel University Wide band reconfigurable planar antenna with omnidirectional and directional radiation patterns

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KR101169932B1 (en) 2010-09-10 2012-07-30 주식회사 이엠따블유 Multi band mimo antenna
US20140118211A1 (en) * 2012-10-25 2014-05-01 Henry Cooper Omnidirectional 3d antenna
US20150349418A1 (en) * 2012-12-21 2015-12-03 Drexel University Wide band reconfigurable planar antenna with omnidirectional and directional radiation patterns

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