KR101679281B1 - Dual band patch antenna for adjusting polarization - Google Patents

Dual band patch antenna for adjusting polarization Download PDF

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Publication number
KR101679281B1
KR101679281B1 KR1020150162011A KR20150162011A KR101679281B1 KR 101679281 B1 KR101679281 B1 KR 101679281B1 KR 1020150162011 A KR1020150162011 A KR 1020150162011A KR 20150162011 A KR20150162011 A KR 20150162011A KR 101679281 B1 KR101679281 B1 KR 101679281B1
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South Korea
Prior art keywords
patch antenna
circular patch
circular
frequency band
degrees
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KR1020150162011A
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Korean (ko)
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추호성
변강일
류성준
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홍익대학교 산학협력단
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    • 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
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
    • 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
    • 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
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • 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
    • H01Q9/0464—Annular ring patch

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Disclosed is a microstrip patch antenna capable of polarization control in a dual band. The disclosed patch antenna operates in the L1 band (1.5754 GHz) and the L2 band (1.2276 GHz), and can have a specific polarization specification independent of the other bands in each band.

Description

[0001] DUAL BAND PATCH ANTENNA FOR ADJUSTING POLARIZATION [0002]

The following embodiments relate to a patch antenna capable of controlling polarization, specifically to a microstrip patch antenna capable of controlling polarization in a dual band.

2. Description of the Related Art [0002] With the recent advancement of various wireless communication technologies and miniaturization thereof, integration of antennas is required to realize various systems in a limited space. In order to overcome spatial limitations due to the integration of antennas, antennas operating in multiple bands are generally used, and various polarizations are applied to obtain stable reception performance for each frequency band. In particular, studies have been conducted to control polarization of an antenna to further improve reception performance in an urban environment where performance degradation due to multipath is noticeable.

However, most conventional researches are limited to research on deriving a specific polarization according to the field of use of the antenna, so that there is a disadvantage in that the reception rate is lowered due to difficulty in the polarization tuning. Research has been conducted on reconfigurable antennas that insert diodes into antenna shapes and feed networks to adaptively perform polarization tuning, but the complexity of the design and the increased cost of fabrication due to additional circuit structures have.

The following embodiments are intended to control the polarization of a microstrip patch antenna in a dual band.

 According to an exemplary embodiment, a first radiating element including a first circular patch antenna and a first parasitic line surrounding the first circular patch antenna, a second circular patch antenna and a second parasitic antenna surrounding the second circular patch antenna, A second radiating element including a line and the first radiating element are printed on a first dielectric, the second radiating element is printed on a second dielectric, and the first dielectric is laminated on the second dielectric / RTI >

The first parasitic line is composed of two arcs arranged point-symmetrically with respect to the center point of the first circular patch antenna, and the second parasitic line is symmetric about the center point of the second circular patch antenna As shown in FIG.

The first angle formed by the interval between the two arcs constituting the first parasitic line and the center point of the first circular patch antenna and the interval between the two arcs constituting the second parasitic line are larger than the interval between the second circular patch The polarization characteristic of the patch antenna can be determined by the second angle formed with the center point of the antenna.

The diameter of the first circular patch antenna is inversely proportional to the center frequency of the first frequency band, and the diameter of the second circular patch antenna is smaller than the diameter of the second circular patch antenna. The antenna of claim 1, wherein the patch antenna operates in a first frequency band and a second frequency band, And may be inversely proportional to the center frequency of the second frequency band.

Here, the diameter of the first circular patch antenna is half of the wavelength corresponding to the center frequency of the first frequency band, and the diameter of the second circular patch antenna is half of the wavelength corresponding to the center frequency of the second frequency band Lt; / RTI >

The first circular patch antenna may be directly fed using a feed line passing through the second circular patch antenna, and the second circular patch antenna may be coupled to the first circular patch antenna using the first circular patch antenna.

The center point of the first circular patch antenna may be located on a straight line passing through the center point of the second circular patch antenna and perpendicular to the second circular patch antenna.

According to the following embodiments, it is possible to adjust the polarization of the microstrip patch antenna in the dual band.

1 is a diagram illustrating a structure of a microstrip patch antenna capable of polarization control in a dual band according to an exemplary embodiment.
FIG. 2 is a view showing an axial ratio characteristic of a microstrip patch antenna according to an exemplary embodiment in a first frequency band. FIG.
3 is a diagram illustrating the axial ratio characteristics of the microstrip patch antenna according to the exemplary embodiment in the second frequency band.
4 is a view showing reflection coefficients of a microstrip patch antenna according to an exemplary embodiment.
5 is a graph illustrating the front gain characteristics of a microstrip patch antenna according to an exemplary embodiment.
6 is a diagram illustrating an antenna axial ratio characteristic of a microstrip patch antenna according to an exemplary embodiment.
FIG. 7 is a diagram illustrating a 2D radiation pattern when the microstrip patch antenna according to the exemplary embodiment operates as a circularly polarized wave. FIG.
8 is a view illustrating a 2D radiation pattern when the microstrip patch antenna according to the exemplary embodiment operates as a linearly polarized wave.
9 is a view showing a magnetic field distribution of a microstrip patch antenna according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a structure of a microstrip patch antenna capable of polarization control in a dual band according to an exemplary embodiment. FIG. 1 (a) is a top view of a first radiating element included in a microstrip patch antenna, and FIG. 1 (b) is a top view of a second radiating element included in a microstrip patch antenna. 1 (c) is a side view of a microstrip patch antenna in which two radiating elements are stacked.

The microstrip patch antenna according to the exemplary embodiment has a structure in which two radiating elements (shown in Figs. 1 (a) and 1 (b)) are stacked to obtain a dual band characteristic. 1 (a)) of the microstrip patch antenna according to the exemplary embodiment includes a first circular patch antenna 110, a first parasitic line 121 (122) surrounding the first circular patch antenna ). The second radiating element (shown in FIG. 1 (b)) includes a second circular patch antenna 140 and a second parasitic line 151, 152 surrounding the second circular patch antenna 140.

The first radiating elements 173,174 and 175 are printed on the first dielectric 171 and the second radiating elements 176,178 and 179 are printed on the second dielectric. According to one aspect, the first dielectric 171 may be deposited over the second dielectric 172. Here, the first dielectric 171 and the second dielectric 172 are made of a ceramic material having a high dielectric constant (

Figure 112015112646572-pat00001
).

The first parasitic line 121 and 122 surrounding the first circular patch antenna 110 are formed by two arcs 121 arranged in a point symmetrical shape centering on the center point 131 of the first circular patch antenna 110 , 122). The two arcs 121 and 122 are spaced apart from the circular patch antenna 110 at a predetermined distance 136. The two circular arcs 121 and 122 are operatively coupled to the first circular patch antenna 110.

The second parasitic lines 151 and 152 surrounding the second circular patch antenna 140 are connected to two circular arcs 151 and 152 arranged in point symmetry about the center point 161 of the second circular patch antenna 140 ). The two arcs 151 and 152 are spaced apart from the circular patch antenna 110 at a predetermined distance 166. The two circular arcs 151 and 152 are operatively coupled to the second circular patch antenna 140.

According to one aspect, the microstrip patch antenna shown in FIG. 1 may operate in a first frequency band and a second frequency band. Here, the first frequency band may be the L1 band (1.5754 GHz), and the second frequency band may be the L2 band (1.2276 GHz).

Here, the diameter of the first circular patch antenna 110 may be determined in inverse proportion to the center frequency of the first frequency band, and the diameter of the second circular patch antenna 140 may be determined in inverse proportion to the center frequency of the second frequency band .

Specifically, the diameter of the first circular patch antenna 110 is half the wavelength corresponding to the center frequency of the first frequency band (1.5754 GHz when the first frequency band is the L1 band), and the diameter of the second circular patch antenna 140 may be a half of the wavelength corresponding to the center frequency of the second frequency band (1.2276 GHz when the second frequency band is the L2 band).

The center point 131 of the first circular patch antenna 110 passes through the center point 161 of the second circular patch antenna 140 and is positioned on a straight line orthogonal to the second circular patch antenna 140 .

According to one aspect, the first circular patch antenna (140, 173) may be located at the top of the second circular patch antenna (140). In this case, the feeder lines for supplying power to the first circular patch antennas 110 and 173 are connected to the first circular patch antennas 110 and 173 through the second circular patch antenna 140, (110) is directly fed using a feeder line. 1 (a) shows the distance from the feed point 134 where the feed line is connected to the first circular patch antenna 110 and the center point 131 of the first circular patch antenna 110 to the feed position 134 ).

The second circular patch antennas 140 and 176 are physically spaced apart from the first circular patch antennas 110 and 173 and may be electrically coupled and fed by coupling. The second circular patch antennas 140 and 176 may be physically spaced apart from the feed lines that supply power to the first circular patch antennas 110 and 173, And the feed line has a hole 164 that is larger than the diameter of the feed line and the feed line passes through the holes 164 provided in the second circular patch antennas 140 and 176 and is connected to the first circular patch antennas 110 and 173 Can be connected. 1 (b) shows the distance 165 from the center point 161 of the hole 164 and the second circular patch antenna 140, 167 to the hole 164.

According to one aspect, since the first radiating element is printed on the first dielectric 171, the first radiating element and the second radiating element can be spaced apart by the thickness of the first dielectric 171. In this case, the coupling strength between the first radiating element and the second radiating element can be determined according to the thickness of the first dielectric 171.

According to one aspect, the first parasitic lines 121 and 122 may be spaced apart from each other at predetermined intervals 132 and 137. In this case, a gap 132, 137 between the two arcs 121, 122 is formed at a first angle (for example,

Figure 112015112646572-pat00002
, 133 determine the polarization characteristics of the patch antenna.

In addition, the second parasitic lines 151 and 152 may be spaced apart from each other at a predetermined interval 162 and 167. In this case, the gap 162, 167 between the two arcs 151, 152 forms a second angle (the center of the second circular patch antenna 140)

Figure 112015112646572-pat00003
, 163 determine the polarization characteristics of the patch antenna.

Exemplary design variables of the microstrip patch antenna that can be used in the L1 frequency band and the L2 frequency band can be summarized as shown in the following table.

[Table 1]

Figure 112015112646572-pat00004

here,

Figure 112015112646572-pat00005
Is the diameter of the first circular patch antenna (110, 173)
Figure 112015112646572-pat00006
Is the diameter of the second circular patch antenna (140, 176).
Figure 112015112646572-pat00007
Is the thickness of the two arcs 121 and 122 constituting the first parasitic lines 121 and 122,
Figure 112015112646572-pat00008
Are the thicknesses of the two arcs 161 and 162 constituting the second parasitic lines 161 and 162. [
Figure 112015112646572-pat00009
Is an interval 137 between two arcs 121 and 122 constituting the first parasitic line 121 and 122,
Figure 112015112646572-pat00010
And the interval 167 between the two arcs 161 and 162 constituting the second parasitic lines 161 and 162. [

Figure 112015112646572-pat00011
Is the spacing 136 between the first circular patch antenna 110,173 and the two arcs 121,122,
Figure 112015112646572-pat00012
Is the spacing 166 between the second circular patch antenna (140, 176) and the two arcs (161, 162).

Figure 112015112646572-pat00013
Represents the length of the first dielectric 171 and the second dielectric 172,
Figure 112015112646572-pat00014
Represents the distance from the center point 131 of the first circular patch antenna 110 to the feed position 134. [
Figure 112015112646572-pat00015
Represents the thickness of the first dielectric 171,
Figure 112015112646572-pat00016
Represents the thickness of the second dielectric 172.

2 to 3, a microstrip patch antenna according to the exemplary design parameters shown in Table 1 is formed on a first angle

Figure 112015112646572-pat00017
And the second angle
Figure 112015112646572-pat00018
It is possible to have various polarization characteristics according to the change of the polarization.

FIG. 2 is a view showing an axial ratio characteristic of a microstrip patch antenna according to an exemplary embodiment in a first frequency band. FIG. According to one aspect, the first frequency band may be the L1 band, and the center frequency may be 1.5754 GHz.

The x-axis shows a first angle (a) at which the intervals 132 and 137 between the two arcs 121 and 122 form the center point 131 of the first circular patch antenna 110

Figure 112015112646572-pat00019
Axis 133 and the y-axis represents a second angle (a) at which the intervals 162 and 167 between the two arcs 151 and 152 form the center point 161 of the second circular patch antenna 140
Figure 112015112646572-pat00020
, 163). The z-axis represents the axial ratio of the polarized wave formed by the microstrip patch antenna shown in Fig.

When the value of the axial ratio is '+1', the microstrip patch antenna exhibits the characteristics of the star polarized wave, and when the axial ratio is '-1', the characteristic of the left polarized wave is represented. When the value of the axial ratio is '0', the linear polarization characteristic is shown.

2, in order for the microstrip patch antenna to have the characteristics of circular polarization in the first frequency band,

Figure 112015112646572-pat00021
Can be found between 120 and 130 degrees.

Further, in order for the microstrip patch antenna to have the characteristics of linear polarization in the first frequency band,

Figure 112015112646572-pat00022
Can be found between 80 and 120 degrees.

3 is a diagram illustrating the axial ratio characteristics of the microstrip patch antenna according to the exemplary embodiment in the second frequency band. According to one aspect, the second frequency band may be the L2 band, and the center frequency may be 1.2276 GHz.

3, in order for the microstrip patch antenna to have the characteristics of circular polarization in the second frequency band,

Figure 112015112646572-pat00023
Is fixed at 120 degrees, and the second angle
Figure 112015112646572-pat00024
Can be between 120 and 140 degrees.

Further, in order for the microstrip patch antenna to have the characteristics of linear polarization in the second frequency band,

Figure 112015112646572-pat00025
Is fixed at 90 degrees, and the second angle
Figure 112015112646572-pat00026
Can be between 80 and 130 degrees.

Referring to FIGS. 2 to 3, the microstrip patch antenna shown in FIG. 1 has a first angle < RTI ID = 0.0 >

Figure 112015112646572-pat00027
And the second angle
Figure 112015112646572-pat00028
It can be seen that the axial ratio value can be changed from '-1' to '+1' according to the change of the axial ratio.

4 is a view showing reflection coefficients of a microstrip patch antenna according to an exemplary embodiment. In FIG. 4, the solid line is the measured value of the microstrip patch antenna fabricated according to Table 1, and the dotted line represents the simulated value. Here,

Figure 112015112646572-pat00029
And the second angle < RTI ID = 0.0 >
Figure 112015112646572-pat00030
Is 140 degrees.

The measured reflection coefficient is -12.8 dB at 1.555 GHz, -7.7 dB at 1.215 GHz, the simulation value is -12.8 dB at 1.575 GHz, and -19 dB at 1.23 GHz.

Comparing the simulated value with the measured value, it can be seen that the microstrip patch antenna fabricated according to Table 1 shows a reflection coefficient close to the simulation value.

5 is a graph illustrating the front gain characteristics of a microstrip patch antenna according to an exemplary embodiment. In FIG. 5, the solid line is the measured value of the microstrip patch antenna fabricated according to Table 1, and the dotted line represents the simulated value.

In FIG. 5, the RHC gain value indicated by a '+' sign is a value measured in an anechoic chamber, and the RHC gain value indicated by a solid line is a value measured in a normal environment. The measured values of the front gain are 4.2 dBic at 1.545 GHz and 5.8 dBic at 1.215 GHz and the cross polarization levels are -19 dB (1.545 GHz) and -25 dB (1.215 GHz).

6 is a diagram illustrating an antenna axial ratio characteristic of a microstrip patch antenna according to an exemplary embodiment. In FIG. 6, '+' denotes a measured value obtained by measuring a microstrip patch antenna fabricated according to Table 1, and a dotted line denotes a simulated value.

The minimum value of the axial ratio of the microstrip patch antenna is 1.9 dB at 1.545 GHz and 0.7 dB at 1.215 GHz. The simulation values are 1.6 dB (1.574 GHz) and 1.2 dB (1.224 GHz). Comparing the simulated value with the measured value, it can be seen that the microstrip patch antenna fabricated according to Table 1 shows the axial ratio value close to the simulation value.

FIG. 7 is a diagram illustrating a 2D radiation pattern when the microstrip patch antenna according to the exemplary embodiment operates as a circularly polarized wave. FIG. In FIG. 7, a solid line indicates a measured value obtained by measuring the microstrip patch antenna fabricated according to Table 1, and a dotted line indicates a simulated value.

7 (a) shows a 2D radiation pattern in a zx plane of a microstrip patch antenna having a circular polarization characteristic at 1.575 GHz, and Fig. 7 (b) shows a 2D radiation pattern in a zy plane will be.

Figs. 7C and 7D show a 2D radiation pattern in the z-x plane and a 2D radiation pattern in the z-y plane of the microstrip patch antenna having a circular polarization characteristic at 1.227 GHz.

The microstrip patch antenna according to the exemplary embodiment has a cross polarization level of -13.1 dB or more at 1.575 GHz and a performance of -19.9 dB or more at 1.227 GHz. Also, the average value of the cross polarization levels in the upper half of the band is -18.7 dB and -23.2 dB in each band. The 1.575 GHz half power beam width of the microstrip patch antenna according to the exemplary embodiment is 108 degrees in the zx plane and 118 degrees in the zy plane. The half power beam width at 1.227 GHz is 115 degrees in the zx plane, 112 in the zx plane .

8 is a diagram illustrating a 2D radiation pattern when the microstrip patch antenna according to the exemplary embodiment operates as a linearly polarized wave. In Fig. 8, the solid line is the measured value of the microstrip patch antenna fabricated according to Table 1, and the dotted line represents the simulated value.

8 (a) shows a 2D radiation pattern in a zx plane of a microstrip patch antenna having a linear polarization characteristic at 1.575 GHz, and Fig. 8 (b) shows a 2D radiation pattern in a zy plane will be.

8 (c) and 8 (d) show the 2D radiation pattern in the z-x plane and the 2D radiation pattern in the z-y plane of the microstrip patch antenna having the characteristics of linear polarization at 1.227 GHz.

Referring to FIG. 8, the difference between the right-handed polarization and left-handed polarization gain values is 0.87 dB (1.575 GHz) and 0.62 dB (1.227 GHz). Therefore, it can be seen that the manufactured microstrip patch antenna has a linear polarization characteristic. Also, the half - power beam width of each plane at 1.575 GHz of the fabricated microstrip patch antenna was 100 degrees and 105 degrees, and 115 and 110 degrees at 1.227 GHz.

Referring to the measured values and the simulation values shown in FIGS. 7 to 8, the antenna according to the exemplary embodiment is configured such that the interval 132, 137, 162, 167 between the parasitic lines 121, 122, It can be confirmed that only the polarization characteristics of the antenna are changed without distorting the antenna characteristics such as the front gain and the half power beam width in the dual band according to the center points of the antennas 110 and 140 and the angles 133 and 163 formed .

9 is a view showing a magnetic field distribution of a microstrip patch antenna according to an exemplary embodiment.

121 points were observed at intervals of 0.5 mm on the y-axis and the z-axis in order to calculate the magnetic field, and FIG. 9 shows the magnetic field distribution observed from the side of the antenna.

FIG. 9A is a diagram showing the distribution of the magnetic field at 1.575 GHz, and FIG. 9B is a diagram showing the distribution of the magnetic field at 1.227 GHz.

Referring to FIG. 9A, it can be seen that at 1.575 GHz, the magnetic field distribution is concentrated between the upper patch and the lower patch, where the average field intensity is 11.8 A / m.

Also, referring to FIG. 9 (b), at 1.227 GHz, the field distribution is concentrated between the lower patch and the ground, and the field intensity at this time is 14.4 A / m.

9, the microstrip patch antenna according to the exemplary embodiment has a structure in which the intervals 132, 137, 162, and 167 between the parasitic lines 121, 122, 151, and 152 are equal to that of the circular patch antennas 110 and 140 It can be seen that the polarization characteristics can be freely controlled in the dual band by changing the angles 133 and 163 formed with the center point.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

171: First dielectric
173, 174, 175: the first radiating element
176, 178, 179: the second radiating element

Claims (9)

A first radiating element including a first circular patch antenna and a first parasitic line surrounding the first circular patch antenna;
A second radiating element including a second circular patch antenna and a second parasitic line surrounding the second circular patch antenna; And
The first radiating element is printed on a first dielectric, the second radiating element is printed on a second dielectric, the first dielectric is laminated on the second dielectric,
The first parasitic line is composed of two arcs arranged in a point-symmetrical shape about the center point of the first circular patch antenna,
The second parasitic line is composed of two arcs arranged in a point-symmetrical shape about the center point of the second circular patch antenna,
Wherein a first angle formed by a distance between two arcs constituting the first parasitic line and a center point of the first circular patch antenna and a distance between two arcs constituting the second parasitic line are larger than a distance between the second circular patch antenna And the polarization characteristic is determined by the second angle formed with the center point. The method according to claim 1,
Wherein the patch antenna has a circular polarization characteristic in the L1 frequency band when the first angle is a value between 120 degrees and 130 degrees. The method according to claim 1,
Wherein the patch antenna has a circular polarization characteristic in an L2 frequency band when the first angle is 120 degrees and the second angle is a value between 120 degrees and 140 degrees. The method according to claim 1,
Wherein the patch antenna has a characteristic of linear polarization in an L1 frequency band when the first angle is a value between 80 degrees and 120 degrees. The method according to claim 1,
Wherein the patch antenna has a characteristic of linear polarization in an L2 frequency band when the first angle is 90 degrees and the second angle is a value between 80 degrees and 130 degrees. The method according to claim 1,
Wherein the patch antenna operates in a first frequency band and a second frequency band,
Wherein the diameter of the first circular patch antenna is inversely proportional to the center frequency of the first frequency band,
Wherein a diameter of the second circular patch antenna is inversely proportional to a center frequency of the second frequency band. The method according to claim 6,
Wherein the diameter of the first circular patch antenna is half the wavelength corresponding to the center frequency of the first frequency band,
Wherein the diameter of the second circular patch antenna is half the wavelength corresponding to the center frequency of the second frequency band. The method according to claim 1,
Wherein the first circular patch antenna is directly fed using a feed line passing through the second circular patch antenna,
And the second circular patch antenna is coupling-fed using the first circular patch antenna. The method according to claim 1,
Wherein a center point of the first circular patch antenna passes through a center point of the second circular patch antenna and is located on a straight line orthogonal to the second circular patch antenna.
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KR101891562B1 (en) 2017-03-27 2018-08-24 홍익대학교 산학협력단 Array antenna using dual band loop antenna
KR101952523B1 (en) * 2017-11-23 2019-02-26 홍익대학교 산학협력단 Antenna using circular double-loop structure
KR20190103956A (en) * 2018-02-28 2019-09-05 한국전자통신연구원 Dual band planar antenna and thereof structure in communication system
KR102207151B1 (en) * 2019-07-31 2021-01-25 삼성전기주식회사 Antenna apparatus
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WO2021080034A1 (en) * 2019-10-24 2021-04-29 엘지전자 주식회사 Electronic device having 5g array antenna
KR102275167B1 (en) * 2020-08-21 2021-07-08 주식회사 센서뷰 Wideband patch antenna device for millimeter wave
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KR101891562B1 (en) 2017-03-27 2018-08-24 홍익대학교 산학협력단 Array antenna using dual band loop antenna
KR101952523B1 (en) * 2017-11-23 2019-02-26 홍익대학교 산학협력단 Antenna using circular double-loop structure
KR20190103956A (en) * 2018-02-28 2019-09-05 한국전자통신연구원 Dual band planar antenna and thereof structure in communication system
KR102583963B1 (en) * 2018-02-28 2023-09-27 한국전자통신연구원 Dual band planar antenna and thereof structure in communication system
KR102486786B1 (en) 2019-07-31 2023-01-09 삼성전기주식회사 Antenna apparatus
KR20210015976A (en) * 2019-07-31 2021-02-10 삼성전기주식회사 Antenna apparatus
US11621499B2 (en) 2019-07-31 2023-04-04 Samsung Electro-Mechanics Co., Ltd. Antenna apparatus
KR102207151B1 (en) * 2019-07-31 2021-01-25 삼성전기주식회사 Antenna apparatus
WO2021080034A1 (en) * 2019-10-24 2021-04-29 엘지전자 주식회사 Electronic device having 5g array antenna
KR102275167B1 (en) * 2020-08-21 2021-07-08 주식회사 센서뷰 Wideband patch antenna device for millimeter wave
WO2022173193A1 (en) * 2021-02-10 2022-08-18 삼성전자 주식회사 Antenna structure and electronic device comprising same
WO2023054926A1 (en) * 2021-09-30 2023-04-06 주식회사 센서뷰 Millimeter wave antenna
KR20230046570A (en) * 2021-09-30 2023-04-06 주식회사 센서뷰 Antenna for millimeter wave
KR102607436B1 (en) * 2021-09-30 2023-11-29 주식회사 센서뷰 Antenna for millimeter wave
WO2023085451A1 (en) * 2021-11-10 2023-05-19 엘지전자 주식회사 Antenna module having adjusted radiation pattern, and electronic device comprising same
CN118232012A (en) * 2024-05-24 2024-06-21 西安电子科技大学 Microstrip multi-frequency antenna loaded with via holes and branches

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