KR101661471B1 - Antenna - Google Patents

Antenna Download PDF

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Publication number
KR101661471B1
KR101661471B1 KR1020150162751A KR20150162751A KR101661471B1 KR 101661471 B1 KR101661471 B1 KR 101661471B1 KR 1020150162751 A KR1020150162751 A KR 1020150162751A KR 20150162751 A KR20150162751 A KR 20150162751A KR 101661471 B1 KR101661471 B1 KR 101661471B1
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KR
South Korea
Prior art keywords
transmission line
shorting
dielectric substrate
antenna
short
Prior art date
Application number
KR1020150162751A
Other languages
Korean (ko)
Inventor
김채영
김동주
장은석
양대근
김경수
Original Assignee
경북대학교 산학협력단
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Application filed by 경북대학교 산학협력단 filed Critical 경북대학교 산학협력단
Priority to KR1020150162751A priority Critical patent/KR101661471B1/en
Application granted granted Critical
Publication of KR101661471B1 publication Critical patent/KR101661471B1/en
Priority to PCT/KR2016/013371 priority patent/WO2017086750A1/en

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    • 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
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/20—Two collinear substantially straight active elements; Substantially straight single active elements
    • 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
    • H01Q9/40—Element having extended radiating surface

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Abstract

The present invention relates to an antenna. According to one embodiment of the present invention, the antenna comprises: a dielectric substrate; a main monopole antenna formed on the dielectric substrate; a plurality of parasitic monopole antennas formed on the dielectric substrate and arranged around the main monopole antenna interposed therebetween; a ground surface formed on a lower surface of the dielectric substrate; a ring shape transfer line formed on the lower surface of the dielectric substrate; a first short-circuit device formed in one side of the transfer line to make a first part of the transfer line short-circuited; and a second short-circuit device formed in the other side of the transfer line to make a second part of the transfer line short-circuited. According to one embodiment of the present invention, beam steering is realized without using a passive device, such as an inductor, a capacitor, etc., and fast data transfer is realized by forming an orthogonal beam.

Description

Antenna {ANTENNA}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna, and more particularly, to an antenna capable of implementing beam steering without using passive elements such as an inductor, a capacitor, and the like.

An electronically steerable parasitic array radiator antenna is an antenna that uses an active element and a parasitic element around it. It increases the hardware complexity and power consumption of a multi-input multi-output (MIMO) system using a conventional array antenna. And the like. A beam-space MIMO system using an electron beam steering parasitic array antenna with a single RF chain is presented in the Journal of the Korean Institute of Communication Sciences (J-KICS) '13 -10 Vol.38A No.10. Conventional electronically controlled parasitic radiator antennas have the disadvantage of requiring passive elements such as inductors, capacitors, etc. to implement beam steering.

An object of the present invention is to provide an antenna capable of implementing beam steering without using passive elements such as inductors, capacitors, and the like.

Another problem to be solved by the present invention is to provide an electronically regulated parasitic radiator antenna capable of realizing high-speed data transmission by forming an orthogonal beam without using a passive element such as an inductor, a capacitor and the like.

The problems to be solved by the present invention are not limited to the above-mentioned problems. Other technical subjects not mentioned will be apparent to those skilled in the art from the description below.

An antenna according to an embodiment of the present invention includes a dielectric substrate; A main monopole antenna formed on the dielectric substrate; A plurality of parasitic monopole antennas formed on the dielectric substrate and disposed with the main monopole antenna interposed therebetween; A ground plane formed on a lower surface of the dielectric substrate; A ring-shaped transmission line formed on the lower surface of the dielectric substrate; A first shorting element formed at one side of the transmission line and shorting a first portion of the transmission line; And a second shorting element formed on the other side of the transmission line and shorting a second portion of the transmission line.

Wherein the ground plane includes a metal surface formed on a lower surface of the dielectric substrate, the transmission line includes a first etch line formed in a ring shape on the metal surface, and a second etch line surrounding the first etch line And a second etch line formed in an etched manner in the form of a ring.

The transmission line may be formed to pass through the bottom surface of the plurality of parasitic monopole antennas.

The first etch line may be formed inside the plurality of parasitic monopole antennas, and the second etch line may be formed outside the plurality of parasitic monopole antennas.

Wherein the first shorting element comprises a first stub that grounds the first portion of the transmission line to the ground plane and the second shorting element comprises a first stub that grounds the second portion of the transmission line to the ground plane 2 stubs.

The directivity of the antenna can be adjusted according to the short circuit position of the transmission line by the first shorting element and the second shorting element.

Wherein the main antenna is formed by passing through the cavity and a feeding part for feeding the main monopole antenna at a lower portion of the dielectric substrate is further provided at a center of the transmission line, .

The first shorting element and the second shorting element may be formed symmetrically with respect to a direction connecting the main monopole antenna and the plurality of parasitic monopole antennas.

According to another aspect of the present invention, there is provided a dielectric substrate comprising: a dielectric substrate; A main monopole antenna formed on the dielectric substrate; A plurality of parasitic monopole antennas formed on the dielectric substrate and disposed with the main monopole antenna interposed therebetween; A ground plane formed on a lower surface of the dielectric substrate; A ring-shaped transmission line formed on the lower surface of the dielectric substrate; And a plurality of short-circuit adjustment elements provided at different positions on the transmission line and short-circuiting the transmission line in accordance with a short-circuit signal.

Wherein the ground plane includes a metal surface formed on a lower surface of the dielectric substrate and the transmission line is formed to pass through a lower end surface of the plurality of parasitic monopole antennas, A first etch line formed inside the plurality of parasitic monopole antennas; And a second etch line formed on the metal surface in an annular shape surrounding the first etch line and formed outside the plurality of parasitic monopole antennas.

The plurality of short-circuiting elements comprising: a first diode shorting a first portion on the transmission line by the ground plane in accordance with a first shorting signal; A second diode shorting a second portion of the transmission line by the ground plane in accordance with the first shorting signal; A third diode shorting a third portion on the transmission line by the ground plane in accordance with a second shorting signal; And a fourth diode shorting the fourth portion on the transmission line by the ground plane in accordance with the second shorting signal.

Wherein the first diode and the second diode are formed to be symmetrical with respect to a direction connecting the main monopole antenna and the plurality of parasitic monopole antennas, And the plurality of parasitic monopole antennas are symmetrical with respect to a direction connecting the plurality of parasitic monopole antennas.

The electronically regulated parasitic radiator antenna may form an orthogonal beam by the plurality of short-circuit adjusting elements.

According to the embodiment of the present invention, an antenna capable of implementing beam steering without using passive elements such as inductors, capacitors, and the like is provided.

According to an embodiment of the present invention, there is provided an electronically regulated parasitic radiator antenna capable of realizing high-speed data transmission by forming an orthogonal beam without using passive elements such as inductors, capacitors and the like.

The effects of the present invention are not limited to the effects described above. Unless stated, the effects will be apparent to those skilled in the art from the description and the accompanying drawings.

1 is a perspective view of an antenna 100 according to an embodiment of the present invention.
2 is a perspective view of an antenna 100 according to an embodiment of the present invention as viewed from below.
3 is a cross-sectional view of the 'A' portion shown in FIG.
4 is a cross-sectional view of the portion 'B' shown in FIG.
5 is a diagram for explaining optimized physical parameters of an antenna according to an embodiment of the present invention.
6 illustrates the first shorting element 160 and the second shorting element 170 in the clockwise direction at 75 ° and -75 ° with respect to the direction from the main monopole antenna 120 toward the first parasitic monopole antenna 131, FIG. 2 is a rear view of an antenna formed in a position shown in FIG.
7 is an image showing the surface current and gain of the antenna shown in Fig.
8 shows the first shorting element 160 and the second shorting element 170 in the clockwise direction at 105 ° and -105 ° in the clockwise direction with respect to the direction from the main monopole antenna 120 toward the first parasitic monopole antenna 131, FIG. 2 is a rear view of an antenna formed in a position shown in FIG.
9 is an image showing the surface current and gain of the antenna shown in Fig.
10 shows the first shorting element 160 and the second shorting element 170 in the clockwise direction at an angle of 90 ° and -90 ° with respect to the direction from the main monopole antenna 120 toward the first parasitic monopole antenna 131, FIG. 2 is a rear view of an antenna formed in a position shown in FIG.
11 is an image showing the surface current and gain of the antenna shown in Fig.
12 is a graph showing impedances of the antenna shown in FIG. 6 according to frequencies.
FIG. 13 is a graph showing the frequency-specific impedance of the antenna shown in FIG.
FIG. 14 is a graph showing the frequency-specific impedance of the antenna shown in FIG.
15 is a graph showing a radiation pattern of the antenna shown in FIG.
16 is a graph showing the three-dimensional radiation pattern gain of the antenna shown in FIG.
17 is a graph showing a radiation pattern of the antenna shown in Fig.
18 is a graph showing a three-dimensional radiation pattern gain of the antenna shown in FIG.
19 is a rear view of an electronically steerable parasitic radiator antenna 100 according to another embodiment of the present invention.
FIG. 20 is an enlarged view of 'C' portion of FIG. 19, showing a first shorting device 190 constituting an electronically steerable parasitic array radiator antenna according to an embodiment of the present invention.
Fig. 21 is a graph showing the radiation pattern of the electronically regulated parasitic radiator antenna shown in Fig. 19. Fig.
22 is a graph showing a first basis pattern B1 of the electronically steerable parasitic radiator antenna shown in Fig.
23 is a graph showing a second basis pattern B2 of the electronically steerable parasitic radiator antenna shown in Fig.

Other advantages and features of the present invention and methods for accomplishing the same will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and the present invention is only defined by the scope of the claims. Although not defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. A general description of known configurations may be omitted so as not to obscure the gist of the present invention. In the drawings of the present invention, the same reference numerals are used as many as possible for the same or corresponding configurations. To facilitate understanding of the present invention, some configurations in the figures may be shown somewhat exaggerated or reduced.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", or "having" are intended to specify the presence of stated features, integers, steps, operations, components, Steps, operations, elements, parts, or combinations thereof, whether or not explicitly described or implied by the accompanying claims.

An antenna according to an embodiment of the present invention includes a main monopole antenna on a top surface of a dielectric substrate and a plurality of parasitic monopole antennas; A ground plane and a ring-shaped transmission line on the bottom surface of the dielectric substrate; And a short-circuit element short-circuiting the transmission line. In the antenna according to the embodiment of the present invention, the length of the transmission line is determined by the short-circuit element, and the length of the transmission line has non-directionality or directivity depending on the length of the transmission line. According to this embodiment, the directivity of the antenna can be adjusted by adjusting the length of the transmission line by the position of the shorting element.

According to an embodiment of the present invention, there is provided an electronically regulated parasitic radiator antenna comprising: a main monopole antenna and a plurality of parasitic monopole antennas on a top surface of a dielectric substrate; A ground plane and a ring-shaped transmission line on the bottom surface of the dielectric substrate; And a short-circuit adjusting element short-circuiting the transmission line according to the short-circuit signal. The length of the transmission line is changed by the short-circuit adjusting element in the electronically regulated parasitic radiator antenna according to the embodiment of the present invention, so that the directivity of the antenna is controlled.

1 is a perspective view of an antenna 100 according to an embodiment of the present invention. 2 is a perspective view of an antenna 100 according to an embodiment of the present invention as viewed from below. 1 and 2, an antenna 100 according to an exemplary embodiment of the present invention includes a dielectric substrate 110, a main monopole antenna 120, a plurality of parasitic monopole antennas 131 and 132, a ground plane 140, And includes a transmission line 150, a first shorting element 160, a second shorting element 170, and a feeding part 180.

The dielectric substrate 110 may be provided with a dielectric material. Although the dielectric substrate 110 is formed in a disc shape in the drawing, it may have a different shape. The dielectric substrate 110 may have cavities 112,114. The cavities 112 and 114 may be formed to penetrate the dielectric substrate 110 in the thickness direction. Parasitic monopole antennas 120 are inserted into the first cavity 112 formed at the center of the dielectric substrate 110 and parasitic monopole antennas 131 and 132 are inserted into the second cavity 114 formed at both sides of the dielectric substrate 110. [ Is inserted.

The main monopole antenna 120 is formed on the dielectric substrate 110 and is fed by the power feeder 180. The main monopole antenna 120 may be formed at the center of the dielectric substrate 110. The main monopole antenna 120 may be made of metal. In one embodiment, the main monopole antenna 120 may be provided in the form of a rod that extends long in a direction perpendicular to the dielectric substrate 110.

The plurality of parasitic monopole antennas 131 and 132 are formed on the dielectric substrate 110 and disposed on both sides of the main monopole antenna 120 to emit signals. The parasitic monopole antennas 131 and 132 may be made of metal. In one embodiment, the parasitic monopole antennas 131 and 132 may be provided in the shape of a rod extending in a direction perpendicular to the dielectric substrate 110. Although two parasitic monopole antennas 131 and 132 are formed in the illustrated embodiment, the number of parasitic monopole antennas may be increased. At this time, the parasitic monopole antenna may be formed to surround the main monopole antenna at a predetermined angle.

FIG. 3 is a sectional view of the 'A' portion shown in FIG. 1, and FIG. 4 is a sectional view of a 'B' portion shown in FIG. 1 to 4, the first cavity 112 and the second cavity 114 include lower cavities 112a and 114a having the same diameter as the main monopole antenna 120 and the parasitic monopole antennas 131 and 132, And upper cavities 112b and 114b having a larger diameter than the main monopole antenna 120 and the parasitic monopole antennas 131 and 132. [

The main monopole antenna 120 is inserted into the lower cavity 112a of the first cavity 112 so that the lower end face 120a can be electrically connected to the feed inner core 182 of the feed part 180 by soldering or the like . Accordingly, the main monopole antenna 120 can be fed by the feeder 180. The parasitic monopole antennas 131 and 132 are inserted into the lower cavity 114a of the second cavity 114 so that the lower end faces 131a and 132b can be electrically connected to the ground plane 140. [

The ground plane 140 is formed on the lower surface of the dielectric substrate 110. The ground plane 140 may be provided as a metal surface formed on the lower surface of the dielectric substrate 110. The ground plane 140 includes a first ground plane 141 inside the transmission line 150, a second ground plane 142 outside the transmission line 150, a first ground plane 141 and a second ground plane 142 And a third ground plane 143 between the first and second ground planes. The third ground plane 143 may be formed in a ring shape between the first etch line 151 and the second etch line 152 of the transmission line 150. Reference numeral 144 denotes a metal connecting plate for electrically connecting the first ground plane 141 and the second ground plane 142.

The transmission line 150 may be formed in a ring shape on the lower surface of the dielectric substrate 110. The transmission line 150 may include a first etch line 151 and a second etch line 152. The first etching line 151 may be etched in a ring shape on the metal surface of the ground plane 140. The second etch line 152 may be etched in the form of an annulus surrounding the first etch line 151 on the metal surface of the ground plane 140. In the illustrated embodiment, the transmission line 150 is formed in a circular ring shape, but it may be formed in another ring shape such as a square shape.

The transmission line 150 may be formed to pass through the lower end surfaces 131a and 132a of the plurality of parasitic monopole antennas 131 and 132. In one embodiment, the first etch line 151 may be formed inside the plurality of parasitic monopole antennas 131 and 132, and the second etch line 152 may be formed outside the plurality of parasitic monopole antennas 131 and 132.

The first shorting element 160 may be formed on one side of the transmission line 150 to short-circuit the first portion of the transmission line 150. In one embodiment, the first shorting element 160 may be provided as a first stub that grounds the first portion of the transmission line 150 to the ground plane 140. The second shorting element 170 may be formed on the other side of the transmission line 150 to short-circuit the second portion of the transmission line 150. In one embodiment, the second shorting element 170 may be provided as a second stub that grounds the second portion of the transmission line 150 to the ground plane 140. The first shorting element 160 and the second shorting element 170 may be provided as a metal.

The first shorting element 160 and the second shorting element 170 may be formed symmetrically with respect to a direction connecting the main monopole antenna 120 and the plurality of parasitic monopole antennas 131 and 132. In a modified embodiment of the present invention, a first etching portion in the shape of a semicircular ring is formed in a region constituting a part of a loop of the ground plane 140, a second etching portion is formed in a region constituting the remaining part of the loop, And the second etching part has a gap so that the shorted transmission line 150 can be formed by etching. Here, the first shorting element 160 and the second shorting element 170 correspond to the portion of the ground plane 140 that is not etched between the first etching portion and the second etching portion in the transmission path 150 .

The directivity of the antenna 100 according to the present embodiment can be adjusted according to the shorting position of the transmission line 150 by the first shorting element 160 and the second shorting element 170. The length of the transmission line 150 is determined by the first shorting element 160 and the second shorting element 170 and the directivity of the beam transmitted by the antenna 100 corresponding to the length of the transmission line 150 Can be adjusted. Therefore, according to the present embodiment, beam steering can be realized according to the positions of the first shorting element 160 and the second shorting element 170 without using a passive element such as an inductor or a capacitor. In the illustrated embodiment, two short-circuiting elements 160 and 170 are formed, but it is also possible that a larger number of short-circuiting elements are formed depending on the number of parasitic monopole antennas, the size of the dielectric substrate, and the like.

5 is a diagram for explaining optimized physical parameters of an antenna according to an embodiment of the present invention. 5, the diameter D3 of the dielectric substrate 110 is λ / 4 (where λ is the wavelength corresponding to the signal transmission frequency), the length L1 of the main monopole antenna 120 and the parasitic monopole antennas 131 and 132, And the distance D1 between the main monopole antenna 120 and the parasitic monopole antennas 131 and 132 can be determined as? / 10.

In one embodiment, if the signal transmission frequency is 2.45 GHz, lambda may be determined as 122.4 mm. The thickness of the dielectric substrate 110 is 2 mm and the upper diameter of the cavities 112 and 114 is 2 mm and the diameters of the main monopole antenna 120 and the parasitic monopole antennas 131 and 132 are 1 mm, An antenna was fabricated with an overall circumference of 76.8 mm, and an experiment was conducted to analyze the beam steering characteristics of the antenna.

6 illustrates the first shorting element 160 and the second shorting element 170 in the clockwise direction at 75 ° and -75 ° with respect to the direction from the main monopole antenna 120 toward the first parasitic monopole antenna 131, FIG. 2 is a rear view of an antenna formed in a position shown in FIG. 7 is an image showing the surface current and gain of the antenna shown in Fig. Referring to FIGS. 6 and 7, it can be seen that the beam of the antenna shown in FIG. 6 is oriented in the 180 ° direction.

8 shows the first shorting element 160 and the second shorting element 170 in the clockwise direction at 105 ° and -105 ° in the clockwise direction with respect to the direction from the main monopole antenna 120 toward the first parasitic monopole antenna 131, FIG. 2 is a rear view of an antenna formed in a position shown in FIG. 9 is an image showing the surface current and gain of the antenna shown in Fig. Referring to FIGS. 8 and 9, it can be seen that the beam of the antenna shown in FIG. 8 is oriented in the 0 ° direction.

10 shows the first shorting element 160 and the second shorting element 170 in the clockwise direction at an angle of 90 ° and -90 ° with respect to the direction from the main monopole antenna 120 toward the first parasitic monopole antenna 131, FIG. 2 is a rear view of an antenna formed in a position shown in FIG. 11 is an image showing the surface current and gain of the antenna shown in Fig. Referring to FIGS. 8 and 9, it can be seen that the beam of the antenna shown in FIG. 8 has omnidirectionality.

FIG. 12 is a graph showing the impedance of the antenna shown in FIG. 6 according to frequency, FIG. 13 is a graph showing the impedance of the antenna shown in FIG. 8 according to frequency, FIG. 14 is a graph showing the impedance It is a graph showing. As shown in FIGS. 12 to 14, it can be seen that the impedance of the antenna according to this embodiment does not change significantly at the frequency of 2.45 GHz when the position of the shorting elements 160 and 170 changes.

FIG. 15 is a graph showing a radiation pattern of the antenna shown in FIG. 6, FIG. 16 is a graph showing a three-dimensional radiation pattern gain of the antenna shown in FIG. 6, FIG. 17 is a graph showing the radiation pattern of the antenna shown in FIG. And FIG. 18 is a graph showing the three-dimensional radiation pattern gain of the antenna shown in FIG. As shown in Figs. 15 to 18, the antenna shown in Fig. 6 has a beam directivity of 180 degrees, and the antenna shown in Fig. 8 has a beam directivity of 0 degrees.

19 is a rear view of an electronically steerable parasitic radiator antenna 100 according to another embodiment of the present invention. In the following description of the embodiment of FIG. 19, redundant description of the same or corresponding components to those of the previously described embodiment can be omitted. The embodiment of FIG. 19 can control the short-circuit and connection of the transmission line 150 by a plurality of short-circuit adjustment elements 190 to 220 instead of a short-circuit element, and by the short-circuit adjustment element of the plurality of pairs 190, Which is different from the above-described embodiment in that the beam steering can be adjusted.

19, the first short-circuit adjusting element 190 and the second short-circuit adjusting element 200 are arranged at an angle of 75 ° in the clockwise direction with respect to the direction from the main monopole antenna 120 toward the first parasitic monopole antenna 131, The third short adjustment element 210 and the fourth short adjustment element 220 are formed at the positions of 105 ° and -105 °, May be variously modified. It is also possible to implement non-directionality when short-circuit adjustment elements are formed at 90 ° and -90 ° positions clockwise with respect to the direction from the main monopole antenna 120 to the first parasitic monopole antenna 131 .

The plurality of short-circuit adjustment elements 190 to 220 are provided at different positions on the transmission line 150, and the transmission line 150 can be short-circuited according to the short-circuit signal. In one embodiment, the plurality of short-circuit adjustment elements 190-220 may include a first diode 192, a second diode 202, a third diode 212, and a fourth diode 222. The shorting signal may be a signal that turns on / off the diode and may be provided from a control circuit not shown.

FIG. 20 is an enlarged view of 'C' portion of FIG. 19, showing a first shorting device 190 constituting an electronically steerable parasitic array radiator antenna according to an embodiment of the present invention. Although not shown, the second to fourth short-circuit elements 200 to 220 may be provided in the same manner as the first short-circuit element 190. The first shorting element 190 includes a first diode 192 that operates in accordance with a shorting signal provided through an input terminal 194.

The first diode 192 shorts the first portion on the transmission line 150 by the ground plane 140 in accordance with the first shorting signal. The second diode 202 short-circuits the second portion on the transmission line 150 by the ground plane 140 according to the first short-circuit signal. The third diode 212 short-circuits the third portion on the transmission line 150 by the ground plane 140 according to the second short-circuit signal. The fourth diode 222 short-circuits the fourth portion on the transmission line 150 by the ground plane 140 according to the second short-circuit signal.

The first diode 192 and the second diode 202 may be formed symmetrically with respect to a direction connecting the main monopole antenna 120 and the plurality of parasitic monopole antennas 131 and 132. The third diode 212 and the fourth diode 222 may also be formed symmetrically with respect to a direction connecting the main monopole antenna 120 and the plurality of parasitic monopole antennas 131 and 132.

The first pair of shorting control elements 190 and 200 and the second pair of shorting elements 210 and 220 may operate in a complementary relation. The first diode 192 and the second diode 202 operate so that the third diode 212 and the fourth diode 222 are short-circuited while the first and second portions of the transmission line 150 are short- May not be provided. Conversely, when the third diode 212 and the fourth diode 222 operate so that the third and fourth portions of the transmission line 150 are short-circuited, the first diode 192 and the second diode 202 are short- The signal may not be provided.

In one embodiment, if a shorting signal shorting the transmission line 150 is provided to the first shorting control element 190 and the second shorting control element 200, the first shorting control element 190 and the second shorting control element 200, The transmission line 150 is short-circuited by the transmission line 200. At this time, the third short-circuit adjusting element 210 and the fourth short-circuit adjusting element 220 are opened, and the electronically regulated parasitic radiator antenna has characteristics of the antenna as shown in FIG. 6, do.

Conversely, if a shorting signal is provided to the third shorting control element 210 and the fourth shorting controlling element 220, the third short adjusting element 210 and the fourth short adjusting element 220 can be used to form the transmission line 150. [ Is short-circuited. At this time, the first short-circuit adjusting element 190 and the second short-circuit adjusting element 200 are opened, and the electronically regulated parasitic radiator antenna has characteristics of the antenna as shown in FIG. 8, so that the beam steering in the 0- .

Fig. 21 is a graph showing the radiation pattern of the electronically regulated parasitic radiator antenna shown in Fig. 19. Fig. In FIG. 21, "DC (+1.5)" represents a case where the transmission line 150 is short-circuited by the first diode 192 and the second diode 202, and "DC (-1.5)" represents a case where the third diode 212 and the fourth diode 222 are short-circuited to the transmission line 150. FIG.

In FIG. 21, the angle is based on a direction perpendicular to the direction connecting the main monopole antenna 120 and the parasitic monopole antennas 131 and 132. Referring to FIG. 21, when the right portion of the transmission line 150 is short-circuited by the first diode 192 and the second diode 202, it has a beam directivity in the left-hand direction (90 ° in the drawing) It can be seen that when the left portion of the transmission line 150 is short-circuited by the diode 212 and the fourth diode 222, it has a beam directivity in the outermost direction (270 ° in the drawing).

Fig. 22 is a graph showing a first basic pattern B1 of the electronically regulated parasitic radiator antenna shown in Fig. 19, Fig. 23 is a graph showing a second fundamental pattern B1 of the electronically regulated parasitic radiator antenna shown in Fig. pattern) (B2). Wherein the first base pattern (B1) is a (G 2 + G 1) / 2, the second base pattern (B2) is a (G 2 -G 1) / 2 . 22 and Fig. 23, it can be seen that the first basic pattern B1 and the second basic pattern B2 have an orthogonal relationship. In other words, the electronically regulated parasitic radiator antenna according to the present embodiment can form an orthogonal beam by the plurality of short-circuit adjustment elements 190 to 220.

The electronically regulated parasitic radiator antenna according to the embodiment of the present invention can realize the beam steering technique by adjusting the length of the transmission line by a plurality of short-circuit adjusting elements. The electronically regulated parasitic radiator antenna according to the present embodiment has an advantage that beam steering can be realized without using passive elements such as an inductor, a capacitor, and the like. According to this embodiment, two orthogonal beams can be formed to realize high-speed data transmission.

It is to be understood that the above-described embodiments are provided to facilitate understanding of the present invention, and do not limit the scope of the present invention, and it is to be understood that various modifications are possible within the scope of the present invention. It is to be understood that the technical scope of the present invention should be determined by the technical idea of the claims and the technical scope of protection of the present invention is not limited to the literary description of the claims, To the invention of the invention.

100: Antenna
110: dielectric substrate
120: main monopole antenna
131, 132: parasitic monopole antenna
140: ground plane
150: transmission line
160: first shorting element
170: second shorting element
180: Feeding part
190: first short-
192: first diode
200: second short-circuit control element
202: a second diode
210: third short-circuit control element
212: third diode
220: fourth short-circuit control element
222: fourth diode

Claims (13)

A dielectric substrate;
A main monopole antenna formed on the dielectric substrate;
A plurality of parasitic monopole antennas formed on the dielectric substrate and disposed with the main monopole antenna interposed therebetween;
A ground plane formed on a lower surface of the dielectric substrate;
A ring-shaped transmission line formed on the lower surface of the dielectric substrate;
A first shorting element formed at one side of the transmission line and shorting a first portion of the transmission line; And
And a second shorting element formed on the other side of the transmission line and shorting a second portion of the transmission line. The method according to claim 1,
Wherein the ground plane includes a metal surface formed on a lower surface of the dielectric substrate,
Wherein the transmission line includes a first etching line formed in a ring shape on the metal surface and a second etching line formed in an annular shape surrounding the first etching line on the metal surface. 3. The method of claim 2,
Wherein the transmission line is formed to pass through the lower end surfaces of the plurality of parasitic monopole antennas. The method of claim 3,
The first etching line is formed inside the plurality of parasitic monopole antennas,
And the second etching line is formed outside the plurality of parasitic monopole antennas. The method according to claim 1,
Wherein the first shorting element comprises a first stub grounding the first portion of the transmission line to the ground plane,
And the second shorting element includes a second stub that grounds the second portion of the transmission line to the ground plane. The method according to claim 1,
Wherein the directivity is adjusted according to a short circuit position of the transmission line by the first shorting element and the second shorting element. The method according to claim 1,
A cavity penetrating the dielectric substrate is formed at a central portion of the transmission line,
Wherein the main monopole antenna is formed through the cavity,
And a feeding part feeding the main monopole antenna at a lower portion of the dielectric substrate. The method according to claim 1,
Wherein the first shorting element and the second shorting element are formed symmetrically with respect to a direction connecting the main monopole antenna and the plurality of parasitic monopole antennas. A dielectric substrate;
A main monopole antenna formed on the dielectric substrate;
A plurality of parasitic monopole antennas formed on the dielectric substrate and disposed with the main monopole antenna interposed therebetween;
A ground plane formed on a lower surface of the dielectric substrate;
A ring-shaped transmission line formed on the lower surface of the dielectric substrate; And
And a plurality of short-circuit adjustment elements provided at different positions on the transmission line and short-circuiting the transmission line in accordance with a short-circuit signal. 10. The method of claim 9,
Wherein the ground plane includes a metal surface formed on a lower surface of the dielectric substrate,
Wherein the transmission line is formed to pass through a lower end surface of the plurality of parasitic monopole antennas,
The transmission line includes:
A first etching line formed in a ring shape on the metal surface and formed inside the plurality of parasitic monopole antennas; And a second etch line formed on the metal surface in the form of a ring surrounding the first etch line and formed outside the plurality of parasitic monopole antennas. 10. The method of claim 9,
Wherein the plurality of short-
A first diode shorting a first portion on the transmission line by the ground plane in accordance with a first shorting signal;
A second diode shorting a second portion of the transmission line by the ground plane in accordance with the first shorting signal;
A third diode shorting a third portion on the transmission line by the ground plane in accordance with a second shorting signal; And
And a fourth diode shorting the fourth portion on the transmission line by the ground plane in accordance with the second shorting signal. 12. The method of claim 11,
Wherein the first diode and the second diode are formed symmetrically with respect to a direction connecting the main monopole antenna and the plurality of parasitic monopole antennas,
Wherein the third diode and the fourth diode are formed symmetrically with respect to a direction connecting the main monopole antenna and the plurality of parasitic monopole antennas. 10. The method of claim 9,
And an orthogonal beam is formed by the plurality of short-circuit adjustment elements.
KR1020150162751A 2015-11-19 2015-11-19 Antenna KR101661471B1 (en)

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JP2002135036A (en) * 2000-10-27 2002-05-10 Atr Adaptive Communications Res Lab Array antenna system
JP2002280942A (en) * 2001-03-15 2002-09-27 Nec Corp Information terminal provided with variable directive antenna
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KR20210003321A (en) * 2019-06-11 2021-01-12 한양대학교 산학협력단 Antenna changeable polratization direction
KR102246561B1 (en) 2019-06-11 2021-04-29 한양대학교 산학협력단 Antenna changeable polratization direction

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