KR20140018620A - Micro-miniature antenna having dual-polarization - Google Patents

Micro-miniature antenna having dual-polarization Download PDF

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Publication number
KR20140018620A
KR20140018620A KR1020120084973A KR20120084973A KR20140018620A KR 20140018620 A KR20140018620 A KR 20140018620A KR 1020120084973 A KR1020120084973 A KR 1020120084973A KR 20120084973 A KR20120084973 A KR 20120084973A KR 20140018620 A KR20140018620 A KR 20140018620A
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KR
South Korea
Prior art keywords
feed
radiator
antenna
feed part
dipole antenna
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KR1020120084973A
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Korean (ko)
Inventor
이정남
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한국전자통신연구원
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Priority to KR1020120084973A priority Critical patent/KR20140018620A/en
Publication of KR20140018620A publication Critical patent/KR20140018620A/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
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole

Abstract

A dual-polarization base station antenna comprises a first feeding unit including first and second feeding surfaces; a second feeding unit which is located in the upper part of the first feeding unit, is arranged in a form of being crossed with the first feeding unit, and includes first and second feeding surfaces; and a plurality of first to fourth radiators which are spaced from the first feeding unit and the second feeding unit at certain intervals and respectively include a short-circuit plate. A first dipole antenna is formed based on the first and second feeding surfaces of the first feeding unit and the short-circuit plates of the second and fourth radiators, and a second dipole antenna is formed based on the first and second feeding surfaces of the second feeding unit and the short-circuit plates of the first and third radiators.

Description

Micro-Miniature Antenna Having Dual-Polarization

The present invention relates to an antenna, and more particularly, to an ultra-small antenna for forming a double polarized wave.

Currently, the wireless communication market is increasing the demand of consumers who want wireless communication saturation and faster service. In the near future, as mobile traffic is rapidly increasing and new mobile services are expected to emerge, the development of next-generation mobile communication technologies to accommodate future services is required.

As various wireless communication technologies are developed, the number of base stations and antennas increases accordingly, and the size of RF (radio frequency) parts and antenna parts increases. Accordingly, several wireless communication can be performed with one base station, and a communication technology considering eco-friendliness is required while implementing a smaller base station. In response to these demands, light-radio technology has been proposed, which allows small base stations to be connected by optical cables to achieve high-speed communication close to the speed of light. In this technology, since there is no base station, a separate installation space is not required for the base station, and power loss due to transmission lines is minimized, and it is advantageous to apply CoMP (coordinated multi-point), a low power consumption and inter-base station interference control technology. There is an advantage. In addition, since the base station is very small, it can be installed anywhere in front of the building, bus station, power pole, street light, etc., where the power and the Internet are connected.

The key technology for constructing a light radio is miniaturization of a base station. In order to realize this, the base station can be miniaturized by embedding the RF section and the antenna in one small square cube. Especially, the miniaturization of the antenna is important. In order to increase the channel capacity, a dual polarized antenna using an electromagnetic field is used, and it is not easy to configure two antennas inside a cube that is constrained by space constraints rather than free space. In addition, when the antenna is inserted into the metal cube, the interface condition is changed to change the characteristics of the antenna, and the size of the antenna needs to be reduced, resulting in a narrow bandwidth and a low gain.

The problem to be solved by the present invention is to provide an ultra-small dual polarized antenna that can be optimally installed even in a small size cube made of metal or aluminum.

In order to achieve the above technical problem, a dual polarized antenna according to a feature of the present invention includes a first feed part including first and second feed surfaces; A second feed part disposed on an upper portion of the first feed part at a first interval and intersecting with the first feed part, the second feed part including first and second feed surfaces; And a plurality of first to fourth radiators spaced apart from the first feed part and the second feed part at a predetermined distance, each of which includes a shorting plate. A first dipole antenna is formed based on the second feed surface and the shorting plates of the second and fourth radiators, and the first and second feed surfaces of the second feed portion and the shorting plates of the first and third radiators are formed. Based on this, a second dipole antenna is formed.

Here, the first and second feed parts, and the first to fourth radiators are located inside the cube, a dielectric substrate is formed at the bottom of the cube, the first feed surface and the second feed part of the first feed part. All of the first feed surface may be connected to the dielectric substrate, and the second feed surface of the first feed portion and the second feed surface of the second feed portion may be spaced apart from the dielectric substrate.

The operating frequency of the first dipole antenna is changed according to the length of the second feed surface of the first feed part, and the operating frequency of the second dipole antenna is changed according to the length of the second feed surface of the second feed part. Can be changed.

Particularly, when only the length of the second feed surface of the first feed part is changed, the operating frequency of the first dipole antenna may be changed and the operating frequency of the second dipole antenna may not be changed. Also, when only the length of the second feed surface of the second feed part is changed, the operating frequency of the first dipole antenna may not be changed and the operating frequency of the second dipole antenna may be changed.

In addition, the operating frequency of the first dipole antenna is changed according to the width of the shorting plate of the second radiator and the shorting plate of the fourth radiator, and the operating frequency of the shorting plate of the first radiator and the shorting plate of the third radiator is changed. The operating frequency of the second dipole antenna may vary.

Meanwhile, the width of the first feed part and the width of the second feed part may be different from each other, and the first dipole antenna and the second feed part may be changed by changing the width of the first feed part and the width of the second feed part, respectively. The degree of matching of the dipole antenna can be changed.

In addition, the frequency matching degree of the base station antenna may vary according to a change in the first interval between the first feed part and the second feed part. The first to fourth radiators may be formed in a bent structure by cutting an arbitrary edge surface and coupling a shorting plate to the cutting surface, respectively, for the first to fourth radiators. In addition, the frequency matching degree of the base station antenna may vary according to the first interval change between the first feed part and the second feed part.

Meanwhile, the shorting plate of the fourth radiator is positioned to correspond to the first feeding surface of the first feeding part, and the shorting plate of the fourth radiator is positioned, and the second feeding surface is spaced apart from the second feeding surface to correspond to the second feeding surface of the first feeding part. The shorting plate of the radiator may be positioned to feed power according to a coupling between the first feeding surface of the first feeding part and the shorting plate of the fourth radiator. In this case, the frequency bandwidth of the first dipole antenna may vary according to the first distance and the second distance.

In addition, the short-circuit plate of the third radiator is positioned to be spaced apart by a third distance corresponding to the first feed surface of the second feed portion, and the first distance is spaced apart by a fourth distance to correspond to the second feed surface of the second feed portion. The shorting plate of the radiator may be positioned to feed power according to the coupling between the first feed surface of the second feeder and the shorting plate of the third radiator. In this case, the frequency bandwidth of the second dipole antenna may vary according to the third distance and the fourth distance.

According to another aspect of the present invention, an antenna is a dual polarization antenna positioned inside a cube, and includes: a first feed part including first and second feed surfaces; A second feed part disposed to cross the first feed part and including first and second feed surfaces; A plurality of first to fourth radiators spaced apart from the first feed part and the second feed part at a predetermined distance, each of which includes a shorting plate; And a dielectric substrate formed at the bottom of the cube, wherein a first feed surface of the first feed portion and a first feed surface of the second feed portion are connected to the dielectric substrate, and a second feed portion of the first feed portion is formed. A feed surface and a second feed surface of the second feed portion are spaced apart from the dielectric substrate, the feed surface and the length of the second feed surface of the first feed portion and the length of the second feed surface of the second feed portion; The operating frequency of the antenna is changed.

Here, in the first feed part and the second feed part, the length of the first feed surface may be longer than the length of the second feed surface. In addition, the short-circuit plate of the fourth radiator is positioned to be spaced apart by a first distance corresponding to the first feed surface of the first feed part, and the second distance is spaced apart by a second distance to correspond to the second feed surface of the first feed part. The shorting plate of the radiator may be positioned so that a first dipole antenna may be formed between the first feeding surface of the first feeding part and the shorting plate of the fourth radiator to supply power according to the coupling. In addition, the short-circuit plate of the third radiator is positioned to be spaced apart by a third distance corresponding to the first feed surface of the second feed portion, and the first distance is spaced apart by a fourth distance to correspond to the second feed surface of the second feed portion. The shorting plate of the radiator may be positioned so that a second dipole antenna may be formed between the first feeding surface of the second feeder and the shorting plate of the third radiator to supply power according to the coupling.

Meanwhile, the first to fourth distances may be the same.

In addition, the first feed portion is formed in a form in which the first feed surface and the second feed surface is connected in the vertical direction, respectively on both sides of the first surface in the horizontal direction, the first feed portion is respectively on both sides of the first surface in the horizontal direction The first feed surface and the second feed surface is formed in the vertical direction connected, the second feed portion is formed in the form of crossing the first feed portion at a first interval on the upper side of the first feed portion, The frequency matching degree of the base station antenna may vary according to the first interval.

According to an embodiment of the present invention, it is possible to provide a micro dual polarization antenna having two metal dipole antennas of electromagnetic and magnetic fields. In particular, the antenna can be installed inside a small size cube made of metal or aluminum, and the radiator and the feeder are spaced apart to induce a coupling phenomenon to extend the frequency bandwidth. In addition, by adjusting the spacing and the width of the feeding portion of the antenna to induce the matching of the antenna and the width of the shorting plate and the length of the feeding portion can be adjusted to move the frequency. Accordingly, it is possible to provide an ultra-small dual polarized antenna that can be mounted inside the cube and obtain a wide bandwidth and high isolation and gain despite being a small antenna.

1 is a structural diagram of a micro dual polarization antenna according to an exemplary embodiment of the present invention.
2 is a view schematically showing the structure of a radiator according to an embodiment of the present invention.
3 is a diagram illustrating a structure of a power supply unit according to an exemplary embodiment of the present invention.
4 and 5 are views showing the arrangement relationship between the feeder and the radiator according to an embodiment of the present invention.
6 is a graph showing the return loss of the dual polarization antenna according to an embodiment of the present invention, Figure 7 is a graph showing the isolation characteristics of a dual polarization antenna according to an embodiment of the present invention.
FIG. 8 is a graph illustrating frequency and return loss characteristics of a shorting plate of a radiator of a dual polarization antenna according to an exemplary embodiment of the present invention.
FIG. 9 is a graph illustrating frequency and return loss characteristics of a dual polarization antenna according to a change in distance between a first feed part and a second feed part.
10 and 11 are graphs illustrating frequency and return loss characteristics of a dual polarization antenna according to a change in length of a first feeder and a second feeder according to an exemplary embodiment of the present invention.
FIG. 12 is a graph illustrating frequency and return loss characteristics of a dual polarized antenna according to an area of a first feeder and a second feeder according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. In addition, when a part is "connected" to another part, this includes not only the "directly connected" but also the "indirectly connected" with another element in between.

Hereinafter, the embodiment of the present invention will be described with respect to the ultra-miniature double polarized antenna.

1 is a structural diagram of a micro dual polarization antenna according to an exemplary embodiment of the present invention.

The ultra-small dual polarization antenna 1 (hereinafter, referred to as an antenna for convenience of description) according to an embodiment of the present invention includes a plurality of radiators installed in a cube 10 made of a metal or aluminum material, as shown in FIG. 21, 22, 23, 24, a first feed part 31, and a second feed part 32. As shown in the lower part of FIG. 1, the dielectric substrate 40 is positioned at the bottom of the antenna 1 to reduce the size of the antenna 1, and the antenna 1 is externally placed on the top of the cube 10. At the top of the cube 10 is placed a radome 50 with an arbitrary dielectric constant to protect it from the environment.

The size of the cube 10 is smaller than λ / 4 of the operating frequency of the antenna 1, and the height and size of the radiators 21, 22, 23, and 24 forming the antenna are smaller than λ / 4. ) Is large enough to be located inside.

The radiator includes first to fourth radiators 21, 22, 23, and 24. The first to fourth radiators 21, 22, 23, and 24 receive signals from the outside and have a structure as shown in FIG. 2.

2 is a view schematically showing the structure of a radiator according to an embodiment of the present invention.

As shown in FIG. 2, each radiator has a shorting plate 20 coupled to one side thereof, and thus each radiator has a shape in which one side is bent. One side where the shorting plate is formed in the radiator is called "front space" for convenience of description.

In particular, as shown in FIG. 1, each radiator may be formed in a quadrangle, and a radiator may be formed in a shape of cutting an arbitrary edge surface and coupling the shorting plate 20 to the cutting surface. The shorting plate 20 may be formed to surround one surface of the radiator along a cutting surface of the radiator. Herein, although the radiator has a rectangular shape, the shape of the radiator is not limited thereto, and may be various shapes such as a circle and a polygon. The operating frequency of the antenna can be adjusted by varying the width of the shorting plate 20 of each radiator.

Meanwhile, as shown in FIG. 1, the first to fourth radiators 21, 22, 23, and 24 have the first to fourth radiators 21, 22, 23, and 24 so that each front surface thereof faces the center point of the cube 10. ) Is disposed, and the first and second feed parts 31 and 32 are formed at positions corresponding to front surfaces of the first to fourth radiators 21, 22, 23, and 24. The first and second feeders 31 and 32 are spaced apart from each other at the same interval as the first to fourth radiators 21, 22, 23, and 24, respectively. 21, 22, 23, 24).

3 is a diagram illustrating a structure of a power supply unit according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the first and second feed units 31 and 32 have a shape in which the letter “C” is rotated by 90 °. In detail, the first feed part 31 is connected to one side of the first feed surface 311 and the first feed surface 311 which are parallel in the horizontal direction, and the second feed surface 312 and the first shape formed in the vertical direction. The third feed surface 313 is connected to the other side of the feed surface 311 formed in the vertical direction. Here, the lengths of the second feed surface 312 and the third feed surface 313 of the first feed portion 31 are different from each other, and the length of the second feed surface 312 is greater than the length of the third feed surface 313. long. The second feed surface 312 of the first feed portion 31 is connected to the dielectric substrate 40 formed at the bottom of the cube 10, and the third feed surface 313 of the first feed portion 31 is a cube. It is spaced apart from the bottom surface (eg, dielectric substrate) of (10).

The second feed part 32 is connected to one side of the first feed surface 321 parallel to the horizontal direction, the second feed surface 322 and the first feed surface formed in the vertical direction by being connected to one side of the first feed surface 321. It is connected to the other side of the 321 includes a third feed surface 323 formed in the vertical direction. Here, the lengths of the second feed surface 322 and the third feed surface 323 of the second feed portion 32 are different from each other, and the length of the second feed surface 322 is greater than the length of the third feed surface 323. long. The second feed surface 322 of the second feed portion 32 is connected to the dielectric substrate 40 formed at the bottom of the cube 10, and the third feed surface 323 of the second feed portion 32 is a cube. It is spaced apart from the bottom surface (eg, dielectric substrate) of (10).

The first feed part 31 and the second feed part 32 are formed to cross each other. That is, while the first feed part 31 is disposed at the lower end of the second feed part 32, the first feed of the first feed surface 311 and the second feed part 32 of the first feed part 31 are provided. The first feed part 31 and the second feed part 32 are disposed such that the front surface 321 crosses each other. The height of the first feed part 31 is lower than the height of the second feed part. Accordingly, as shown in FIG. 3, the second feed part (H1) is spaced apart from the upper portion of the first feed part 31 by a predetermined interval (H1). 32 is located.

In addition, the width of the first feed part 31 and the width of the second feed part 32 may be different from each other. That is, the width W1 of each of the feed surfaces 311, 312, and 313 constituting the first feed part 31 is equal to the width W2 of the feed surfaces 321, 322, and 323 constituting the second feed part 32. Are different. For example, the width W1 of the first feed part 31 may be configured to be wider than the width W2 of the second feed part 32 to adjust the antenna matching characteristic of the antenna 1.

Feeding is performed according to the coupling between the first and second feeders 31 and 32 and the first to fourth radiators 21, 22, 23, and 24 having such a structure.

4 and 5 are views showing the arrangement relationship between the feeder and the radiator according to an embodiment of the present invention.

4 and 5, the first and second feeders 31 and 32 and the first to fourth radiators 21, 22, 23, and 24 are spaced apart from each other at predetermined intervals. Feeding is performed by a coupling between the first and second feed sections 31, 32 and the first to fourth radiators 21, 22, 23, 24.

To this end, referring to FIGS. 1 and 4, the first feed part 31 is positioned between the second radiator 22 and the fourth radiator 24, and the second radiator 22 and the fourth radiator 24. Spaced apart). In particular, the second feed surface 312 of the first feed portion 31 and the shorting plate 241 of the fourth radiator 24 correspond to each other, and the third feed surface 313 of the first feed portion 31 and The shorting plates 221 of the second radiator 22 correspond to each other. Accordingly, power is supplied at the starting point where the second feed surface 312 and the first feed surface 311 of the first feed portion 31 connected to the dielectric substrate 40 are connected. A first dipole antenna is formed by the second radiator 22 and the fourth radiator 24 positioned corresponding to the first feed part 31, and the third feed surface 313 of the first feed part 31 is formed. The operating frequency of the first dipole antenna may be shifted by adjusting the length of.

Meanwhile, referring to FIGS. 1 and 5, the second feeder 32 is positioned between the first radiator 21 and the third radiator 23, and the first radiator 21 and the third radiator 23. Spaced at equal intervals. In particular, the second feed surface 322 of the second feed portion 31 and the shorting plate 231 of the third radiator 23 correspond to each other, and the third feed surface 323 of the second feed portion 32 The shorting plates 211 of the first radiator 21 correspond to each other. Accordingly, power is supplied at the starting point where the second feed surface 322 and the first feed surface 321 of the second feed portion 32 connected to the dielectric substrate 40 are connected. A second dipole antenna is formed by the first radiator 21 and the third radiator 23 positioned corresponding to the second feed part 32, and the third feed surface 323 of the second feed part 32. The operating frequency of the second dipole antenna may be shifted by adjusting the length of.

The frequency of the first dipole antenna formed by the second radiator 22 and the fourth radiator 24 and the frequency of the second dipole antenna formed by the first radiator 21 and the third radiator 233 are independent of each other. Is adjusted.

Here, the first distance between the first feeder 31 and the second radiator 22, the second distance between the first feeder 31 and the fourth radiator 24, the second feeder 32 and The third distance between the first radiator 31 and the fourth distance between the second feed part 32 and the third radiator 33 may be equal to each other. And the closer the distance between the feeders 31, 32 and the radiators 21, 22, 23, 24, the wider the bandwidth of the antenna 1 becomes.

The reflection loss and the isolation degree of the dual polarized antenna according to the embodiment of the present invention having such a structure were measured, and the following results were obtained.

6 is a graph showing the return loss of the dual polarization antenna according to an embodiment of the present invention, Figure 7 is a graph showing the isolation characteristics of a dual polarization antenna according to an embodiment of the present invention.

As shown in FIG. 6, a first dipole antenna S 11 formed of the second radiator 22 and the fourth radiator 24, a first formed of the first radiator 21, and the third radiator 23 is formed. 2 dipole antenna (S 22 ) has a wide frequency bandwidth characteristics, it can be seen that the isolation characteristics between the two antennas has a high isolation characteristics of about -30dB, as shown in FIG.

In addition, the result of measuring the characteristics of the dual polarized antenna according to the embodiment of the present invention while varying the width of each short-circuit plate of the radiator is shown in FIG. FIG. 8 is a graph illustrating frequency and return loss characteristics of a shorting plate of a radiator of a dual polarization antenna according to an exemplary embodiment of the present invention.

As shown in FIG. 8, it can be seen that the frequencies of the first dipole antenna S 11 and the second dipole antenna S 22 move toward higher frequencies as the shorting plates of the respective radiators become wider. Specifically, it can be seen that in the first and second dipole antennas S 11 and S 22 , the frequency is higher as the shorting plates of the radiator are changed to 4 mm, 6 mm, 8 mm, and 10 mm. Therefore, the antenna of the desired frequency band can be realized by appropriately selecting the width of the shorting plate of the radiator without changing the structure of the antenna 1.

In addition, the result of measuring the characteristics of the dual polarized antenna according to the embodiment of the present invention while changing the distance between the first feed portion and the second feed portion is shown in FIG. FIG. 9 is a graph illustrating frequency and return loss characteristics of a dual polarization antenna according to a change in distance between a first feed part and a second feed part.

As shown in FIG. 9, the operating frequency of the antenna is fixed according to the distance H1 between the first feed part 31 and the second feed part 32, but the frequency match is changed. That is, the height of the first feed part 31 is changed while the height of the second feed part 32 is fixed, so that the interval H1 between the first feed part 31 and the second feed part 32 is changed. In this case, it can be seen that the frequency matching characteristic of the second feeder 32 does not change but only the frequency match of the first feeder 31 changes. It can be seen that the frequency matching degree of the antenna becomes worse as the distance H1 between the two feeders becomes wider.

In addition, the results of measuring the characteristics of the dual polarized antenna according to the embodiment of the present invention while varying the length of the first feed section and the second feed section is as shown in Figs. 10 and 11 are graphs illustrating frequency and return loss characteristics of a dual polarization antenna according to a change in length of a first feeder and a second feeder according to an exemplary embodiment of the present invention.

The graph according to FIG. 10 shows the characteristics of an antenna according to the length of the first feed part 31, that is, the length of the third feed surface 313 of the first feed part 31. The characteristics of the antenna according to the length of the two feeders 32, that is, the length of the third feed surface 323 of the second feeder 32 are shown.

When the length of the third feed surface 313 of the first feed portion 31 is changed, as shown in FIG. 10, the frequency characteristic of the second feed portion 32 does not change and only the first feed portion 31 is used. It can be seen that only the frequency characteristic of is changed. As the length of the third feed surface 313 of the first feed part 31 becomes longer, the frequency of the antenna (especially the first dipole antenna) moves toward the lower frequency.

When the length of the third feed surface 323 of the second feed portion 32 is changed, as shown in FIG. 11, the frequency characteristic of the first feed portion 31 does not change and only the second feed portion 32 is used. It can be seen that only the frequency characteristic of is changed. As the length of the third feed surface 323 of the second feed portion 32 is longer, the frequency of the antenna (especially the second dipole antenna) moves toward the lower frequency.

In addition, the results of measuring the characteristics of the dual polarized antenna according to the embodiment of the present invention while varying the width of the first feed portion and the second feed portion is shown in FIG. FIG. 12 is a graph illustrating frequency and return loss characteristics of a dual polarized antenna according to an area of a first feeder and a second feeder according to an embodiment of the present invention.

Referring to FIG. 12, in the ultra-miniature dual polarized antenna 1 according to the embodiment of the present invention, when the widths of the two feed units 31 and 32 are different from each other, the matching degree of the antennas may be different. As a result of the experiment, when the area W1 of the first feed part 31 was 4 mm and the area W2 of the second feed part 32 was 2 mm, the best antenna matching degree was obtained.

Such an antenna according to an embodiment of the present invention may be applied to various kinds of antennas inserted into a cavity-shaped structure having a size smaller than λ / 4 or λ / 2 of an operating frequency in addition to the base station antenna.

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, It belongs to the scope of right.

Claims (19)

A first feed part including first and second feed surfaces;
A second feed part disposed on an upper portion of the first feed part at a first interval and intersecting with the first feed part, the second feed part including first and second feed surfaces; And
A plurality of first to fourth radiators which are spaced apart from the first feed part and the second feed part at a predetermined distance, and each of which includes a shorting plate;
Lt; / RTI >
A first dipole antenna is formed based on the first and second feed surfaces of the first feed part and the shorting plates of the second and fourth radiators, and the first and second feed surfaces of the second feed part and the first feed part. A dual polarized antenna, wherein a second dipole antenna is formed based on the short plates of the first and third radiators. The method of claim 1, wherein
The first and second feeder and the first to fourth radiators are located inside the cube, the dielectric substrate is formed on the bottom of the cube,
A first feed surface of the first feed portion and a first feed surface of the second feed portion are connected to the dielectric substrate, and a second feed surface of the first feed portion and a second feed portion of the second feed portion And a front surface spaced apart from the dielectric substrate. The method according to claim 2, wherein
The operating frequency of the first dipole antenna is changed according to the length of the second feed surface of the first feed part, and the operating frequency of the second dipole antenna is changed according to the length of the second feed surface of the second feed part. , Dual polarized antenna. The method of claim 3, wherein
When only the length of the second feed surface of the first feed portion is changed, the operating frequency of the first dipole antenna is changed and the operating frequency of the second dipole antenna does not change,
When only the length of the second feed surface of the second feed portion is changed, the operating frequency of the first dipole antenna does not change, the operating frequency of the second dipole antenna, dual polarized antenna. The method of claim 1, wherein
The operating frequency of the first dipole antenna is changed according to the width of the shorting plate of the second radiator and the shorting plate of the fourth radiator,
And wherein the operating frequency of the second dipole antenna is varied in accordance with the width of the shorting plate of the first radiator and the shorting plate of the third radiator. The method of claim 1, wherein
And a width of the first feed part and a width of the second feed part are different from each other. The method of claim 1, wherein
And a width of the first feed part and a width of the second feed part, respectively, to change the degree of matching between the first dipole antenna and the second dipole antenna. The method of claim 1, wherein
And a frequency matching degree of the base station antenna varies according to a change in a first interval between the first feed part and the second feed part. The method of claim 1, wherein
Each of the first to fourth radiators is a dual polarized antenna to form a curved structure by cutting an arbitrary corner surface and coupling the short-circuit plate to the cutting surface, respectively. The method of claim 1, wherein
And a frequency matching degree of the base station antenna varies according to a change in a first interval between the first feed part and the second feed part. The method according to any one of claims 1 to 10.
The shorting plate of the fourth radiator is positioned to be spaced apart by a first distance corresponding to the first feed surface of the first feed part, and the second radiator is spaced apart by a second distance to correspond to the second feed surface of the first feed part. The short-circuit plate of which is located, and a power supply is made according to a coupling between the 1st feed surface of a said 1st feed part, and the short circuit board of a said 4th radiator, The dual polarized antenna. The method of claim 11, wherein
And a frequency bandwidth of the first dipole antenna varies according to the first distance and the second distance. The method according to any one of claims 1 to 10.
The shorting plate of the third radiator is positioned to be spaced a third distance in correspondence with the first feed surface of the second feed part, and the first radiator is spaced a fourth distance in correspondence to a second feed surface of the second feed part. The short-circuit plate of which is located, and a power supply is made according to a coupling between the 1st feed surface of the said 2nd feed part, and the short circuit board of the said 3rd radiator, The dual polarized antenna. The method of claim 13, wherein
And a frequency bandwidth of the second dipole antenna varies according to the third and fourth distances. In a dual polarization antenna located inside the cube,
A first feed part including first and second feed surfaces;
A second feed part disposed to cross the first feed part and including first and second feed surfaces;
A plurality of first to fourth radiators spaced apart from the first feed part and the second feed part at a predetermined distance, each of which includes a shorting plate; And
A dielectric substrate formed at the bottom of the cube
/ RTI >
A first feed surface of the first feed portion and a first feed surface of the second feed portion are connected to the dielectric substrate, and a second feed surface of the first feed portion and a second feed portion of the second feed portion The front surface is spaced apart from the dielectric substrate, the operating frequency of the antenna is changed according to the length of the second feed surface of the first feed portion and the second feed surface of the second feed portion, the dual polarized antenna. The method of claim 15, wherein
And wherein, in the first feed section and the second feed section, the length of the first feed surface is longer than the length of the second feed surface. The method of claim 15, wherein
The shorting plate of the fourth radiator is positioned to be spaced apart by a first distance corresponding to the first feed surface of the first feed part, and the second radiator is spaced apart by a second distance to correspond to the second feed surface of the first feed part. A first shorting plate is positioned, and a first dipole antenna is formed between the first feeding surface of the first feeding part and the shorting plate of the fourth radiator, and the feeding is performed according to a coupling.
The shorting plate of the third radiator is positioned to be spaced a third distance in correspondence with the first feed surface of the second feed part, and the first radiator is spaced a fourth distance in correspondence to a second feed surface of the second feed part. The short-circuit plate of which is located, the 2nd polarization antenna which is provided with the 2nd dipole antenna which feeds according to a coupling between the 1st feed surface of the said 2nd feed part, and the short circuit board of the said 3rd radiator. The method of claim 16, wherein
And the first to fourth distances are equal to each other. The method according to any one of claims 15 to 18.
The first feeder is formed in a form in which the first feed surface and the second feed surface are respectively connected in the vertical direction on both sides of the first surface in the horizontal direction,
The first feeder is formed in a form in which the first feed surface and the second feed surface are respectively connected in the vertical direction on both sides of the first surface in the horizontal direction,
The second feeder is formed in a form intersecting the first feeder with a first interval on the upper side of the first feeder, the frequency matching degree of the base station antenna is different according to the first interval, a dual polarized antenna .
KR1020120084973A 2012-08-02 2012-08-02 Micro-miniature antenna having dual-polarization KR20140018620A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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CN107196068A (en) * 2016-03-14 2017-09-22 凯瑟雷恩工厂两合公司 Dipole shape radiator assemblies
JP2018519749A (en) * 2015-06-30 2018-07-19 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． Radiation device
CN109326877A (en) * 2018-11-15 2019-02-12 江苏捷士通射频系统有限公司 Ultra wideband dual polarization radiating element
US10418725B2 (en) 2014-02-25 2019-09-17 Huawei Technologies Co., Ltd. Dual-polarized antenna and antenna array

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10418725B2 (en) 2014-02-25 2019-09-17 Huawei Technologies Co., Ltd. Dual-polarized antenna and antenna array
JP2018519749A (en) * 2015-06-30 2018-07-19 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． Radiation device
US10389018B2 (en) 2015-06-30 2019-08-20 Huawei Technologies Co., Ltd. Radiation apparatus
US10714820B2 (en) 2015-06-30 2020-07-14 Huawei Technologies Co., Ltd. Radiation apparatus
US11316263B2 (en) 2015-06-30 2022-04-26 Huawei Technologies Co., Ltd. Radiation apparatus
CN107196068A (en) * 2016-03-14 2017-09-22 凯瑟雷恩工厂两合公司 Dipole shape radiator assemblies
CN107196068B (en) * 2016-03-14 2021-05-28 瑞典爱立信有限公司 Dipole radiator device
CN109326877A (en) * 2018-11-15 2019-02-12 江苏捷士通射频系统有限公司 Ultra wideband dual polarization radiating element

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