KR101674141B1 - Circularly polarized semi-eccentric annular antenna and manufacturing method for the same - Google Patents

Circularly polarized semi-eccentric annular antenna and manufacturing method for the same Download PDF

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Publication number
KR101674141B1
KR101674141B1 KR1020150124423A KR20150124423A KR101674141B1 KR 101674141 B1 KR101674141 B1 KR 101674141B1 KR 1020150124423 A KR1020150124423 A KR 1020150124423A KR 20150124423 A KR20150124423 A KR 20150124423A KR 101674141 B1 KR101674141 B1 KR 101674141B1
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South Korea
Prior art keywords
dielectric resonator
coaxial line
circularly polarized
polarized antenna
axis radius
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KR1020150124423A
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Korean (ko)
Inventor
황금철
권지나
송찬미
윤종헌
윤주호
이종민
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성균관대학교산학협력단
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Priority to KR1020150124423A priority Critical patent/KR101674141B1/en
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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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H01Q1/46—Electric supply lines or communication lines
    • 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
    • H01Q9/0485—Dielectric resonator antennas

Abstract

The circularly polarized antenna of the asymmetric circular-shaped antenna according to an embodiment of the present invention includes: a dielectric resonator formed in a semicircular shape as the hollow cylindrical hollow cylinder is obliquely cut; And a power supply coaxial line for supplying power to the dielectric resonator.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a circularly polarized antenna having an asymmetrical ring shape and a method of manufacturing the circularly polarized antenna.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna and a manufacturing method thereof, and more particularly, to a circularly polarized antenna having an asymmetrical semicircular shape and a manufacturing method thereof.

Generally, an antenna is a wire installed in the air to efficiently radiate radio waves to a space to achieve a purpose of communication in radio communication or to maintain an electromotive force by radio waves efficiently, and to transmit or receive an electromagnetic wave to or from a space Lt; / RTI >

Among these antennas, circularly polarized antennas are widely used in most modern wireless communication systems, such as satellite communication systems and navigation systems, in order to mitigate multipath fading. In addition, radar systems use circularly polarized antennas to obtain more information from complex structures.

As a result, studies on an antenna for a circular polarization suitable for each system have been intensively studied. In particular, an antenna using a dielectric resonator is widely used because of its low cost, easy feeding, and high efficiency.

Up to now, a dielectric resonator antenna for circular polarization has been implemented by using a dual feed structure, a multi-layer structure or a method of installing a parasitic element.

However, these methods have a problem of complicating the feed structure or increasing the size of the antenna.

Therefore, it is necessary to study a single feeding circularly polarized antenna in which the circularly polarized characteristic is induced in the radiating element itself.

A related prior art is Korean Patent Laid-Open Publication No. 10-2008-0105292 (entitled: Dual Band Circularly Polarized Antenna, Published on Dec. 4, 2008).

An embodiment of the present invention provides an asymmetric circular-shaped circularly polarized antenna for inducing the characteristics of a circularly polarized wave by implementing a circularly polarized antenna using a dielectric resonator having an asymmetric circular shape, and a method of manufacturing the circularly polarized antenna.

The circularly polarized antenna of the asymmetric circular shape of the antenna according to an embodiment of the present invention includes: a dielectric resonator formed in a semicircular shape as a hollow cylinder is obliquely cut; And a power supply coaxial line for exciting a signal to the dielectric resonator.

Wherein the dielectric resonator has a body portion having the semicircular shape and having cut surfaces of different lengths; And a resonator formed between the cut surfaces of the main body and formed in a groove shape corresponding to a circle having a center point at a position spaced apart from the center of the cylinder.

The resonance part may have a second major axis radius and a second minor axis radius based on a center point of the resonance part.

The reflection coefficient characteristic and the axial ratio characteristic of the circularly polarized antenna may be adjustable according to the length ratio of the second major axis radius to the second minor axis radius.

The body portion may have a first major axis radius and a first minor axis with respect to a center point of the cylinder.

The reflection coefficient characteristic and the axial ratio characteristic of the circularly polarized antenna may be adjustable according to the length ratio of the first major axis radius and the first minor axis radius.

The power supply coaxial line may be formed perpendicular to the cut surface of the main body.

The power supply coaxial line may be formed perpendicular to a cut surface having a relatively long length in the cut surface of the main body.

The reflection coefficient characteristic and the axial ratio characteristic of the circularly polarized antenna may be adjustable according to the length of the feeding coaxial line spaced apart from the resonance part in the outer edge direction of the main body part.

The reflection coefficient characteristic of the circularly polarized antenna may be adjustable according to a height ratio between the main body and the feed coaxial line.

According to another aspect of the present invention, there is provided a method of manufacturing a circularly polarized antenna having an asymmetric ring shape, the method comprising: preparing a cylindrical dielectric resonator; Straightening the dielectric resonator in an oblique direction; Forming a resonance part by circularly cutting the dielectric resonator including the cut surface of the dielectric resonator; And forming a feed coaxial line on a straight cut surface of the dielectric resonator.

The step of forming the resonance part may include forming the resonance part in a groove shape by circularly cutting a part corresponding to a circle having a center point at a position apart from the center point of the cylinder.

The straight-line cutting step may include straight-cutting the dielectric resonator in a 45-degree direction.

The forming of the feed coaxial line may include: preparing the feed coaxial line; And disposing the feed coaxial line at a position spaced apart from the resonator.

The details of other embodiments are included in the detailed description and the accompanying drawings.

According to an embodiment of the present invention, by implementing a circularly polarized antenna using a dielectric resonator having an asymmetric circular shape, the characteristics of the circularly polarized wave can be derived.

According to one embodiment of the present invention, by implementing the dielectric resonator by optimizing the ratio of the major axis and the minor axis radius of each of the main body portion and the resonance portion, it is possible to induce a circularly polarized antenna having an asymmetric semicircular shape to operate at a specific frequency (X- can do.

According to an embodiment of the present invention, a dielectric resonator having an asymmetrical shape of a semicircular structure and a power supply coaxial line for feeding the dielectric resonator are disposed on a cut section, thereby realizing a compact and lightweight circularly polarized antenna. Further, Cost and time can also be reduced.

1 is a plan view illustrating an asymmetric circular-shaped circularly polarized antenna according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating an asymmetric circular-shaped circularly polarized antenna according to an embodiment of the present invention. Referring to FIG.
3A and 3B are diagrams illustrating reflection coefficient characteristics and axial ratio characteristics of an antenna according to length ratios of a first major axis and a first minor axis radius of a body portion of a dielectric resonator according to an embodiment of the present invention.
4A and 4B are diagrams showing reflection coefficient characteristics and axial ratio characteristics of the antenna according to length ratios of the second major axis and second minor axis radius of the resonator of the dielectric resonator according to an embodiment of the present invention.
5A and 5B are graphs showing reflection coefficient characteristics and axial ratio characteristics according to positions of a power supply coaxial line in an embodiment of the present invention.
6A and 6B are diagrams showing reflection coefficient characteristics and axial ratio characteristics according to heights of a power supply coaxial line in an embodiment of the present invention.
7 is a graph showing an electric field distribution of a circularly polarized antenna at 10.6 GHz, which changes with time in an embodiment of the present invention.
FIG. 8 is a diagram illustrating simulation and measured reflection coefficient characteristics of an asymmetric circular-shaped circularly polarized antenna according to an embodiment of the present invention.
9 is a graph showing simulation and measured gain characteristics and axial ratio characteristics of an asymmetric circularly polarized circular antenna according to an embodiment of the present invention.
10 is a view showing a radiation pattern in an XZ plane and a YZ plane at 10.6 GHz of an asymmetric circularly polarized antenna of an asymmetrical semicircular shape according to an embodiment of the present invention.
11 is a flowchart illustrating a method of manufacturing a circularly polarized antenna according to an embodiment of the present invention.
FIGS. 12 to 15 are views illustrating a manufacturing process of an asymmetric circular-shaped circularly polarized antenna according to an embodiment of the present invention.

Brief Description of the Drawings The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

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

FIG. 1 is a plan view illustrating an asymmetric circularly polarized antenna according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a circularly polarized antenna according to an embodiment of the present invention. It is a perspective.

Referring to FIGS. 1 and 2, an asymmetrical circularly polarized antenna 100 according to an embodiment of the present invention includes a dielectric resonator 110, and a power supply coaxial line 120.

The dielectric resonator 110 is formed in a semicircular shape as the hollow cylinder is slanted at an angle.

In other words, another cylindrical hollow space exists inside the cylinder, and the cylindrical hollow is cut obliquely, and the empty space is also obliquely cut to form a ring-shaped dielectric resonator 110. Here, the shape of the space obliquely cut inside the cylinder and the cylinder may be formed in the shape of an ellipse.

In other words, since the dielectric resonator 110 is formed with the oblique cut grooves formed therein, the overall shape of the dielectric resonator 110 can be embodied as a semi-circular shape.

The dielectric resonator 110 may include a body portion 112 and a resonator portion 114.

The body portion 112 may be formed in a semicircular shape having a cut surface. Here, the cut surface may be formed by two cut surfaces. The two cut surfaces may be formed to have different lengths. This is because the cylinder is obliquely cut in a state where the center point of the cylinder and the center point of the hollow portion are different from each other.

The body portion 112 may have a first major axis radius r1 and a first minor axis radius r2 with respect to a center point of the cylinder. That is, the body portion 112 may have an elliptical shape when the arc is extended to indicate a circular shape.

In the present embodiment, the length ratio r1 of the first major axis and the first minor axis r1 and r2 may be differently applied, and a reflection coefficient band of -10 dB or less and a reflection coefficient band of 3 dB or less The axial ratio band may be adjusted depending on how the length ratio (ratio1) between the first major axis radius r1 and the first minor axis radius r2 is applied. In other words, the length ratio (ratio1) of the first major axis and minor axis radius (r1, r2) serves as a parameter capable of determining a reflection coefficient band of less than -10 dB and an axial ratio of less than 3 dB of the circularly polarized antenna 100 .

In the present embodiment, among the plurality of measured values for each ratio (ratio1) obtained, the optimum measured value belonging to the X-band band is recognized in the reflection coefficient band of less than -10 dB and the axial ratio band of less than 3 dB, The length ratio ratio1 of the first major axis and the first minor axis r1 and r2 corresponding to the measured value may be selected and the selected ratio ratio1 may be applied to the body portion 112. [

The resonator 114 may be formed between the cut surfaces of the main body 112. At this time, the resonator 114 may be formed in a groove shape corresponding to a circle having a center point at a position apart from the center of the cylinder.

That is, the resonator 114 may be eccentric from the central point of the cylinder, and may be formed in a groove shape close to one of the two cut surfaces of the main body 112. Accordingly, the dielectric resonator 110 can be realized in a semi-circular shape having an asymmetrical structure with the resonator 114 interposed therebetween.

The resonance unit 114 may have a second major axis radius r3 and a second minor axis radius r4 with respect to a center point of the resonance unit 114 when the arc of the resonance unit 114 is extended to be a virtual circular shape. That is, the resonator 114 may have an elliptical shape when expressed as a virtual circle as described above.

In this embodiment, the length ratio r2 of the second major axis and the second minor axis r3 and r4 may be differently applied, and a reflection coefficient band of -10 dB or less and a reflection coefficient band of 3 dB or less The axial ratio band can be adjusted according to how the ratio of the lengths of the second major axis radius r3 and the second minor axis radius r2 is applied. In other words, the length ratio ratio2 of the second major axis and minor axis radius r3 and r4 serves as a parameter capable of determining a reflection coefficient band of less than -10 dB and an axial ratio of less than 3 dB of the circularly polarized wave antenna 100 can do.

In this embodiment, among the plurality of measurement values for each of the obtained ratios (ratio2), an optimal measured value in which the reflection coefficient band of -10 dB or less and the axial ratio band of 3 dB or less belongs to the X-band band is grasped, The length ratio ratio 2 of the second major axis and the second minor axis r 3 and r 4 corresponding to the optimum measured value may be selected and the selected ratio ratio 2 may be applied to the resonance unit 114.

The dielectric resonator 110 may be mounted on the upper surface of the ground plane 101 installed in a rectangular shape (or a circular shape or a polygonal shape).

At this time, the ground plane 101 may have a relatively large and flat surface, and may have a surface formed of a conductive material such as copper, gold or aluminum.

The feed coaxial line 120 feeds the dielectric resonator 110. That is, the power supply coaxial line 120 is positioned on the cut surface of the dielectric resonator 110, so that the circularly polarized wave antenna 100 can be powered.

For this purpose, the feed coaxial line 120 may be formed perpendicular to the cut surface of the main body 112. For example, as shown in the drawing, the feed coaxial line 120 may be formed perpendicular to a cut surface having a relatively long length, among the cut surfaces of the main body 112.

The power supply coaxial line 120 may be spaced apart from the inner edge of the main body 112 in contact with the resonance part 115 by a certain distance in the outer edge direction of the main body 112. That is, the feed coaxial line 120 may be formed at a position spaced apart by a predetermined distance dp from a corner connected to the resonator unit 115 among the corners forming the cut surface of the main body unit 112 have.

Here, the spacing dp of the feed coaxial line 120 can be used as a parameter for determining a reflection coefficient band of -10 dB or less and an axial ratio of 3 dB or less of the circularly polarized antenna 100.

Therefore, in the present embodiment, by simulating the circularly polarized antenna 100 according to the separation distance dp of the feed coaxial line 120, it is possible to obtain a separation distance dp corresponding to the optimal reflection coefficient bandwidth and the axial ratio bandwidth The power supply coaxial line 120 is formed.

The power supply coaxial line 120 may be lower or higher than the height h of the main body 112, or may be the same.

The height hp of the power supply coaxial line 120 may be less than or equal to the height h of the main body 112. The height hp of the power supply coaxial line 120 hp may be formed to have the same value as the height h of the main body portion 112.

The power supply coaxial line 120 may have a predetermined height with respect to the ground plane 101 as described above. The power supply coaxial line 120 may extend from the upper edge of the main unit 112 to the main unit 112, As shown in FIG. That is, the feed coaxial line 120 may be formed at a position spaced a certain distance from the upper edge of the cut surface among the corners forming the cut surface of the main body 112, as shown in FIG.

Here, the height hp of the power supply coaxial line 120 may be used as a parameter for determining a reflection coefficient band of -10 dB or less of the circularly polarized wave antenna 100. That is, the reflection coefficient band of -10 dB or less of the circularly polarized antenna 100 may vary depending on the height hp of the power supply coaxial line 120.

Therefore, in the present embodiment, the circularly polarized wave antenna 100 according to the height hp of the power feeding coaxial line 120 is simulated so as to have the height hp corresponding to the optimum reflection coefficient band, (120).

As described above, according to the embodiment of the present invention, the dielectric resonator is optimized by optimizing the ratio of the major axis and the minor axis radius of each of the main body portion and the resonance portion, so that the asymmetric circularly polarized antenna 100 of the asymmetric semi- It is possible to provide an optimum reflection coefficient band belonging to the < RTI ID = 0.0 >

An antenna to be described below generally exhibits a circular polarization characteristic when the axial ratio is 3 dB or less in a frequency band corresponding to a reflection coefficient of -10 dB or less.

3A and 3B are diagrams illustrating reflection coefficient characteristics and axial ratio characteristics of an antenna according to length ratios of a first major axis and a first minor axis radius of a body portion of a dielectric resonator according to an embodiment of the present invention.

3A and 3B, in an embodiment of the present invention, the first major axis and the first minor axis radius ("r1", "r2" in FIG. 1) of the body portion Quot ;, and the ratio of the lengths (ratio1) of 0.5, 0.67, and 0.8 was compared to simulate the reflection coefficient and the circular polarization characteristic. For reference, in this simulation, the length of the first major axis radius is preset to 7.5 mm.

As a result of the simulation, as the length ratio increases, a reflection coefficient band of less than -10 dB and an axial ratio of less than 3 dB are downsized.

As a result, it was confirmed that when the length ratio is 0.67, the reflection coefficient of less than -10 dB and the axial ratio of less than 3 dB of the circularly polarized antenna 100 are optimal conditions for belonging to the X-band.

4A and 4B are diagrams showing reflection coefficient characteristics and axial ratio characteristics of the antenna according to length ratios of the second major axis and second minor axis radius of the resonator of the dielectric resonator according to an embodiment of the present invention.

As shown in Figs. 4A and 4B, in one embodiment of the present invention, the second major axis and the second minor axis radius ("r3" in Fig. 1, the reflection coefficient and the circular polarization characteristic were simulated by comparing three cases in which the ratio ratios (ratios 2) of 0.6, 0.9, and 1.2 were compared. For reference, in this simulation, the length of the second major axis radius is preset to 3 mm.

As a result of the simulation, the reflection coefficient bandwidth of less than -10 dB and the axial ratio bandwidth of less than 3 dB have shifted to the high frequency band as the length ratio increases. The influence of the change in length ratio of the second major axis and the second minor axis on the reflection coefficient band of -10 dB or less and the axial ratio band of 3 dB or less of the antenna is influenced by the ratio of the length of the first major axis and the minor axis of the first minor axis Were less sensitive.

Therefore, the circularly polarized antenna of the present invention can adjust the reflection coefficient band of -10 dB or less and the axial ratio of 3 dB or less by adjusting the long axis and the short axis ratio of the antenna resonance part without increasing the size of the antenna itself.

5A and 5B are graphs showing reflection coefficient characteristics and axial ratio characteristics according to positions of a power supply coaxial line in an embodiment of the present invention.

Referring to Figs. 5A and 5B, in the embodiment of the present invention, the position dp of the feed coaxial line (see "120 " in Fig. 2) 2 mm, and 4 mm in the case of 0 mm, 0 mm, 0 mm, 2 mm, and 4 mm, respectively.

As a result of simulation, when the dp is 0 mm, the axial ratio characteristic is less than 3 dB in the vicinity of 12.3 GHz, but the reflection coefficient characteristic does not satisfy -10 dB or less in most simulated frequency bands. When the dp is 4 mm, the reflection coefficient characteristics of -10 dB or less in the X-band are satisfied, but the axial ratio bandwidth of 3 dB or less is narrow. When the dp is 2 mm, the -10 dB reflection coefficient bandwidth is 24.2% (9.37-11.95 GHz), corresponding to the X-band band, and corresponds to the largest axial bandwidth of 3 dB or less.

6A and 6B are diagrams showing reflection coefficient characteristics and axial ratio characteristics according to heights of a power supply coaxial line in an embodiment of the present invention.

6A and 6B, in the embodiment of the present invention, when the height (hp) of the feed coaxial line (see 120 in FIG. 2) is 3.5 mm, 4.5 mm, and 5.5 mm were compared and simulated. For reference, the height of the dielectric resonator (see "110" in Figs. 1 and 2) was preset to 4.5 mm in this simulation.

The simulated results show that the reflection coefficient of less than -10 dB in most frequency bands when hp is 3.5 mm and less than -10 dB in the X-band when hp is 4.5 mm and 5.5 mm Reflection coefficient characteristics were satisfied. On the other hand, all three cases of hp showed an axial ratio of 3 dB or less.

That is, the height of the feed coaxial line has a greater effect on the reflection coefficient characteristic than the axial ratio characteristic.

Therefore, by making the height of the feed coaxial line equal to the height of the resonator dielectric, the manufacture of the circularly polarized antenna of the present invention can be made convenient.

7 is a graph showing an electric field distribution of a circularly polarized antenna at 10.6 GHz, which changes with time in an embodiment of the present invention.

Referring to FIG. 7, in one embodiment of the present invention, four cases are compared when the time t is 0, when T / 4, when 2T / 4, and when 3T / 4 And electric field distribution characteristics of the antenna surface were simulated.

As a result of the simulation, when t = 0, the direction of the sum of the electric fields at the antenna surface (Etotal) is directed from the upper left to the lower right. When t = T / 4, the sum of the electric fields is perpendicular to the sum of the electric fields when t = 0 from the lower left to the upper right direction. When t = 2T / 4, the sum of the electric fields was directed from the lower right to the upper left, and when t = 3T / 4, the sum of the electric fields was from right to upper left and t = 2T / Of the total.

That is, as the t increases, the direction of the sum of the electric fields is rotated counterclockwise by 90 degrees. As a result, it can be confirmed that the circularly polarized antenna of the present invention has a post-wave (RHCP) characteristic.

FIG. 8 is a diagram illustrating simulation and measured reflection coefficient characteristics of an asymmetric circular-shaped circularly polarized antenna according to an embodiment of the present invention.

As shown in FIG. 8, the reflection coefficient of the circularly polarized antenna was measured and simulated.

As a result of the measurements and simulations, the measured and simulated reflection coefficient bandwidths of the antenna below -10 dB were 29.14% (9.41-12.62 GHz) and 24.2% (9.37-11.95 GHz), respectively.

Thus, it can be understood that the circularly polarized antenna provides a reflection coefficient bandwidth corresponding to the X-band.

9 is a graph showing simulation and measured gain characteristics and axial ratio characteristics of an asymmetric circularly polarized circular antenna according to an embodiment of the present invention. The axial ratios and gains were simulated and measured in the + Z axis direction ([theta] = 0 [deg.]).

Referring to FIG. 9, in an embodiment of the present invention, the axial ratio and gain of the circularly polarized antenna are measured and simulated.

As a result of the measurements and simulations, the measured and simulated 3 dB or less axial bandwidth of the antenna was 5.71% (10.37-10.98 GHz) and 6.85% (10.15-10.87 GHz), respectively. In addition, the measured RHCP gain was distributed at 4.7 dBic at 4.17 dBic within a 3 dB axial bandwidth.

Accordingly, it can be seen that the circularly polarized antenna operates as a circularly polarized antenna having a post-wave (RHCP) characteristic within the frequency.

10 is a view showing a radiation pattern in an X-Z plane and a Y-Z plane at 10.6 GHz of an asymmetrical circularly polarized antenna of an asymmetrical semicircular shape according to an embodiment of the present invention.

As a result of the measurements and simulations, the antenna showed directivity in the + Z axis direction, and the RHCP gain was 20 dB higher than the LHCP gain. The measured HPBW was 104 degrees and 118 degrees in the X-Z plane and the Y-Z plane, respectively.

Accordingly, the antenna fabricated according to one embodiment of the present invention can be utilized as a circularly polarized antenna in the future in the field of X-band communication system.

Hereinafter, with reference to FIGS. 11 to 15, a method of manufacturing an asymmetric circular-shaped circularly polarized antenna according to an embodiment of the present invention will be described.

FIG. 11 is a flowchart illustrating a method of manufacturing an asymmetrical circularly polarized antenna according to an embodiment of the present invention. FIGS. 12 to 15 illustrate a method of manufacturing an asymmetric circularly polarized antenna according to an embodiment of the present invention, Fig.

11 and 12, in step 1110, a cylindrical dielectric resonator 110 is prepared.

Here, the dielectric resonator 110 may be formed of a material such as alumina (99%).

Next, referring to FIGS. 11 and 13, at step 1120, the dielectric resonator 110 is linearly cut in an oblique direction. For example, the dielectric resonator 110 is linearly cut in a direction of 45 degrees.

Here, the dielectric resonator 110 can be realized as a most preferred embodiment as it is linearly cut in the 45 degree direction. However, the present invention is not limited to this, and the dielectric resonator 110 can be linearly cut in various angular directions.

Next, referring to FIGS. 11 and 14, a resonance part 114 is formed in the dielectric resonator 110 in step 1130. To this end, the dielectric resonator 110 including the cut surface of the dielectric resonator 110 is circularly cut to form the resonator 114.

At this time, the portion corresponding to a circle having a center point at a position distant from the center of the cylinder may be circularly cut to form the resonator portion 114 in a semicircular groove shape.

Accordingly, the dielectric resonator 110 may include a body portion 112 having a semi-circular shape having a cut surface having different lengths and the resonance portion 114 having a groove shape on the cut surface of the body portion 112.

Meanwhile, as another embodiment, the step 1120 may be performed after the step 1130 is performed. In other words, the dielectric resonator 110 may be first cut into a cylindrical shape through a circular cut, and then straightly cut in an oblique direction.

11 and 15, in step 1140, a feed coaxial line 120 is formed on a straight cut surface of the dielectric resonator 110. The power supply coaxial line 120 is arranged vertically at a position spaced apart from the resonant part 114 in the direction of the outer edge of the dielectric resonator 110 do.

As described above, according to the embodiment of the present invention, the feed coaxial line 120 is formed in the dielectric resonator 110 and the dielectric resonator 110 having the asymmetric shape of the semicircular structure, The antenna can be implemented, and further, the manufacturing cost and time can be reduced.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

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, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

101: ground plane
110: dielectric resonator
112:
114:
120: power supply coaxial line
r1: 1st major axis radius
r2: First short radius
r3: 2nd major axis radius
r4: 2nd short radius

Claims (14)

A dielectric resonator in which a hollow cylinder is formed in a semicircular shape as it is obliquely cut; And
A power supply coaxial line for exciting a signal to the dielectric resonator,
Lt; / RTI >
The dielectric resonator
A body portion having the semicircular shape and having cut surfaces of different lengths; And
And a resonance part formed between the cut surfaces of the main body and formed in a groove shape corresponding to a circle having a center point at a position spaced from the center of the cylinder,
And a circularly polarized antenna having an asymmetrical semicircular shape.
delete The method according to claim 1,
The resonator
And has a second major axis radius and a second minor axis radius based on a center point of the resonance part.
The method of claim 3,
The reflection coefficient characteristic and the axial ratio characteristic of the circularly polarized antenna are
And the second short axis radius is adjustable according to a length ratio of the second major axis radius and the second minor axis radius.
The method according to claim 1,
The main body
And a first short axis radius and a first short axis radius with respect to a center point of the cylinder.
6. The method of claim 5,
The reflection coefficient characteristic and the axial ratio characteristic of the circularly polarized antenna are
And the second short axis is adjustable according to a length ratio of the first long axis radius to the first short axis radius.
The method according to claim 1,
The feed coaxial line
Wherein the circularly polarized antenna is formed perpendicular to the cut surface of the body portion.
8. The method of claim 7,
The feed coaxial line
Wherein the cut-off surface of the main body is formed perpendicular to a cut surface having a relatively long length.
8. The method of claim 7,
The reflection coefficient characteristic and the axial ratio characteristic of the circularly polarized antenna are
Wherein the power supply coaxial line is adjustable in accordance with a length of the resonant portion in a direction away from an outer edge of the main body portion.
8. The method of claim 7,
The reflection coefficient characteristic of the circularly polarized antenna is
And the power supply coaxial line is adjustable in accordance with a height ratio between the main body and the power supply coaxial line.
Preparing a cylindrical dielectric resonator;
Straightening the dielectric resonator in an oblique direction;
Forming a resonance part by circularly cutting the dielectric resonator including the cut surface of the dielectric resonator; And
Forming a feed coaxial line on a straight cut surface of the dielectric resonator
Lt; / RTI >
The step of forming the resonant portion
And cutting the portion corresponding to a circle having a center point at a position spaced apart from a center point of the cylindrical dielectric resonator, thereby forming the resonance portion in a groove shape.
delete Preparing a cylindrical dielectric resonator;
Straightening the dielectric resonator in an oblique direction;
Forming a resonance part by circularly cutting the dielectric resonator including the cut surface of the dielectric resonator; And
Forming a feed coaxial line on a straight cut surface of the dielectric resonator
Lt; / RTI >
The straight cutting step
Cutting the dielectric resonator in a direction of 45 degrees
Wherein the circularly polarized antenna has an asymmetric semicircular shape.
Preparing a cylindrical dielectric resonator;
Straightening the dielectric resonator in an oblique direction;
Forming a resonance part by circularly cutting the dielectric resonator including the cut surface of the dielectric resonator; And
Forming a feed coaxial line on a straight cut surface of the dielectric resonator
Lt; / RTI >
The step of forming the feed coaxial line
Preparing the feed coaxial line; And
Disposing the feed coaxial line at a position spaced apart from the resonator in an outer corner of the dielectric resonator
Wherein the circularly polarized antenna has an asymmetric semicircular shape.
KR1020150124423A 2015-09-02 2015-09-02 Circularly polarized semi-eccentric annular antenna and manufacturing method for the same KR101674141B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109193125A (en) * 2018-08-01 2019-01-11 南通大学 Single feedback circularly polarized dielectric resonator antenna

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002246837A (en) * 2000-12-15 2002-08-30 Alps Electric Co Ltd Circularly polarized wave antenna

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002246837A (en) * 2000-12-15 2002-08-30 Alps Electric Co Ltd Circularly polarized wave antenna

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Matthew T. K. TAM 외 1명 "Compact Circular Sector and Annular Sector Dielectric Resonator Antennas", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 47, NO. 5 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109193125A (en) * 2018-08-01 2019-01-11 南通大学 Single feedback circularly polarized dielectric resonator antenna

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