KR101874103B1 - IFF antenna and Radiating element for implementation of symmetric elevation radiation pattern of IFF antenna - Google Patents

IFF antenna and Radiating element for implementation of symmetric elevation radiation pattern of IFF antenna Download PDF

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Publication number
KR101874103B1
KR101874103B1 KR1020180043384A KR20180043384A KR101874103B1 KR 101874103 B1 KR101874103 B1 KR 101874103B1 KR 1020180043384 A KR1020180043384 A KR 1020180043384A KR 20180043384 A KR20180043384 A KR 20180043384A KR 101874103 B1 KR101874103 B1 KR 101874103B1
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KR
South Korea
Prior art keywords
transmission line
dielectric substrate
feed transmission
radiating element
radiation
Prior art date
Application number
KR1020180043384A
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Korean (ko)
Inventor
김성진
한용희
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한화시스템(주)
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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
    • 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
    • H01Q9/16—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

The present invention provides an identification friend or foe (IFF) antenna for realization of a symmetric elevation radiation pattern and a radiating element array thereof which can increase beam steering accuracy and transceiving gains. The radiating element array of the IFF antenna for realization of a symmetric elevation radiation pattern comprises a first radiating element having a first dipole antenna formed on one side of both sides of a first dielectric substrate and a first power feeding transmission line formed on the other side, and feeding power to the first power feeding transmission line and the first dipole antenna through a first power feeding position; and a second radiating element having a second dipole antenna formed on one side of both sides of a second dielectric substrate and a second power feeding transmission line formed on the other side, and feeding power to the second power feeding transmission line and the second dipole antenna through a second power feeding position. The first and the second radiating element are arranged in one row for phase array radar. The first and the second power feeding transmission line are formed in a shape symmetric about a center of the radiating element array.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a piere identification antenna for implementing high angle symmetric radiation patterns and an array of radiator elements for the symmetric elevation radiation pattern.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinna identification antenna and a radiating element array for realizing a high-angle symmetrical radiation pattern, and more particularly, And to a radiating element array and a piere identification antenna for realizing a symmetrical radiation pattern.

Generally, an antenna is positioned at a final stage of a radar system and plays a role of transmitting and receiving an electromagnetic wave signal. The peer identification antenna is used to identify whether the target is allied or enemy.

That is, in the defense defense system, the identification function of the radar system emits a question signal for discriminating the alien to the moving aircraft, receiving the RF signal including the code information suitable for the question signal, .

Recently, a radar identification antenna is designed and operated as a phased array antenna including a plurality of transmitting and receiving modules. The phased array antenna may be designed as an Active Electronically Scanned Array Radar (AESA) structure or a Passive Electronically Scanned Array (PESA) structure.

The radiation pattern (or radiation pattern) of the phased array antenna is formed according to the principle of the pattern multiplication of the radiation pattern of the single element and the array factor. Therefore, the radiation pattern characteristic of a single element affects the radiation pattern characteristic of the entire phased array antenna.

However, when a dipole antenna and a feed line are designed on a printed circuit board (PCB), a current of the same amount should ideally be fed to both poles of the dipole antenna, but the conductor and the dielectric There is a difference in amount of surface current transmitted due to a difference in loss component or a difference in transmission coefficient.

As a result, when an existing pier identification antenna is used, an asymmetrical elevation radiation pattern (0.3 degrees in FIG. 1) as shown in FIG. 1 is formed toward the feeding portion. This asymmetrical radiation pattern causes performance degradation of the peer identification antenna, which requires precise beam steering accuracy, high transmission gain and reception sensitivity.

Korean Registered Patent No. 10-0672967 (Registered on January 16, 2007)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems and an object of the present invention is to solve the problem that the symmetry of the radiation pattern in the elevation angle is lowered due to the difference in the amount of feeding current of the dipole antenna, And a radiating element array for radiating the radiating pattern.

The solution of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a radiating element array of a peer identification antenna for realizing a high-angle symmetrical radiation pattern, comprising: a first dipole antenna formed on one surface of a first dielectric substrate; A first radiation element having a first feed transmission line formed on the other surface thereof and feeding the first feed transmission line and the first dipole antenna through a first feed position; And a second dipole antenna is formed on one surface of the second dielectric substrate, a second feed transmission line is formed on the other surface of the second dielectric substrate, and the second feed transmission line and the second feed transmission line are connected to the second feed transmission line and the second dipole antenna, Wherein the first radiating element and the second radiating element are arranged in a line for phased array radar and the first feeding transmission line and the second feeding transmission line are connected to each other at a center of the radiating element array And may be formed symmetrically with respect to the reference.

Wherein one end of each of the first feed transmission line and the second feed transmission line is designed in a bent shape and arranged so that bent directions of the first and second feed transmission lines are opposite to each other when formed in the first dielectric substrate and the second dielectric substrate, As shown in FIG.

The feed to the first feeder transmission line is performed with a phase difference of 180 degrees by a shifter so that the phases of the first radiation device and the second radiation device can be compensated during pattern synthesis.

Wherein the first radiation device is disposed in the middle of the first dielectric substrate so as to form a ten-sided shape with the first dielectric substrate, wherein the first radiation device is disposed between the first dielectric substrate and the first dielectric substrate, And a first ground disposed to further surround a lower portion of the dielectric substrate, wherein a space between a lower portion of the first dielectric substrate and the first ground is filled with a foam having a dielectric constant.

According to another aspect of the present invention, there is provided a peer identification antenna for implementing a high-angle symmetrical radiation pattern in a phased array radar, comprising: a plurality of double-sided facets including a first double-sided board type dipole radiating element and a second double- A radiation element array in which substrate-type dipole radiation elements are formed to transmit and receive electromagnetic waves toward a target; And a displacer for applying a current to the first double-sided substrate type dipole radiating element to the second double-sided substrate type dipole radiating element by giving a phase difference of 180 degrees to the current supplied to the first double- The first feed transmission line and the second feed transmission line formed in the second double-sided substrate type dipole radiating element may be formed symmetrically with respect to the center of the radiation element array.

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According to the present invention, by disposing the feed transmission lines of the radiation elements symmetrically, it is possible to solve the asymmetry of the radiation pattern in the high-angle direction caused by the difference of the feeding current amount of the dipole antenna.

Further, according to the present invention, it is possible to increase the beam steering accuracy and transmit / receive gain of the phased array radar or the peer identification antenna by providing a symmetrical radiation pattern in the elevation direction in space, and thus to operate a reliable piere identification antenna.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

FIG. 1 is a view showing an example of a conventional asymmetric elevation direction radiation pattern,
FIG. 2 and FIG. 3 are perspective views showing the overall shape of a radiating element array of a peer identification antenna for realizing a high-angle symmetrical radiation pattern according to an embodiment of the present invention;
4 is a side view of a radiating element array of a peer identification antenna according to an embodiment of the present invention,
5 is a plan view of the radiating element array of the peer identification antenna,
FIG. 6 is a view for explaining an example of arrangement of the first feed transmission line and the second feed transmission line,
7 is a view showing an example of a symmetrical radiation pattern in an elevation direction,
8 is a block diagram briefly illustrating a peer identification antenna for implementing a high-angle symmetric radiation pattern according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Further, in the drawings, the thickness of the components is exaggerated for an effective description of the technical content.

Where the terms first, second, etc. are used herein to describe components, these components should not be limited by such terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

Also, terms used herein are for the purpose of illustrating embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details.

In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons for explaining the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 and FIG. 3 are perspective views showing the overall shape of a radiation element array 10 of a peer identification antenna for realizing a high-angle symmetrical radiation pattern according to an embodiment of the present invention.

2 and 3, the radiating element array 10 of the present invention is characterized in that the first radiating element 100 and the second radiating element 200 are arranged in a single row, that is, And has an arrayed form. At this time, the feed lines of the first radiating element 100 on the lower side and the feed lines of the second radiating element 200 on the upper side may be symmetrical with respect to the center, and the currents supplied to the first radiating element 100 Can be applied with a phase difference of 180 degrees.

2 and 3 show an example in which two radiation elements 100 and 200 are arrayed, and the number of radiation elements is not limited to two. For example, three radiation elements may be arrayed in one column, and four radiation elements may be arrayed in two rows and two columns.

The first radiation device 100 includes a first dielectric substrate 110 and a first ground 120 formed in a shape of a ten-sided shape. The first radiation element 100 may be a double-sided board-type dipole radiation element.

The first dipole antenna 130 is formed on one surface of the first dielectric substrate 110 and the first feed transmission line 140 is formed on the other surface of the first dielectric substrate 110. The first dipole antenna 130, And the first feeder transmission line 140, respectively.

The first feeding line 140 may be disposed to the lower end of the first dielectric substrate 110. In this case, the first feeding position may be the lower end or the bottom of the first dielectric substrate 110 .

The first ground 120 may be disposed on both sides of the first dielectric substrate 110 in the middle (or the upper or middle middle) of the first dielectric substrate 110 to form a ten- Lt; / RTI > The first ground 120 is connected to the lower portion of the first dielectric substrate 110 corresponding to the lower portion of the first dielectric substrate 110 (i.e., below the first ground 120) As shown in FIG.

4 is a side view of the radiating element array 10 of the peer identification antenna according to the embodiment of the present invention.

Referring to FIG. 4, the first ground 120 is formed to have wings on both sides with respect to the first dielectric substrate 110, and is formed to the lower portion of the first dielectric substrate 110, 110). Thus, the first feeding position can be formed on the bottom surface of the first dielectric substrate 110.

The space between the first ground 120 and the lower portion of the first dielectric substrate 110 under the first ground 120 may be filled with a foam 150 having a dielectric constant. The bandwidth of the first dipole antenna 130 may be adjusted according to the dielectric constant of the foam 150.

Referring to FIG. 2 again, the second radiation device 200 includes a second ground 220 and a second dielectric substrate 210 in a ten-sided shape. The second radiation element 200 may be a double-sided board-type dipole radiation element.

A second dipole antenna 230 is formed on one surface of the second dielectric substrate 210 and a second feed transmission line 240 is formed on the other surface of the second dielectric substrate 210. The second dipole antenna 230, And the second feeder transmission line 240, respectively.

The second feeding line 240 may be disposed to the lower end of the second dielectric substrate 210. In this case, the second feeding position may be a lower end or a lower surface of the second dielectric substrate 210, .

The second ground 220 may have a wing shape disposed on both sides of the second dielectric substrate 210 so as to form a tenth shape with the second dielectric substrate 210. The second ground 220 also includes a lower portion of the second dielectric substrate 210 below the second dielectric substrate 210 (i.e., below the second ground 220) As shown in FIG.

At this time, the space between the lower portion of the second dielectric substrate 210 and the second ground 220 located below the second ground 220 may be filled with a foam having a dielectric constant. The dielectric constant of the foam formed on the second radiation device 200 and the dielectric constant of the foam 150 formed on the first radiation device 100 may be the same or different depending on the use of the antenna. The foam 150 functions to support the radiation element array 10 by filling a void space structurally and a material having a dielectric constant similar to that of the atmosphere can be used.

5 is a plan view of the radiation element array 10 of the peer identification antenna.

2 and 5, a first wiring hole 160 is formed in a first ground 120 viewed from one side of the first dielectric substrate 110 where the first feed transmission line 140 is disposed .

When the first feed transmission line 140 is wired to the lower portion of the first dielectric substrate 110, the first wiring hole 160 is formed in the first dielectric transmission line 140 so that the first feed transmission line 140 does not contact the first ground 120, And may have a size larger than that of the first feeder transmission line 140.

Similarly, a second wiring hole 260 is formed in the second ground 220 viewed from one side of the second dielectric substrate 210 on which the second feed transmission line 240 is disposed. The second wiring hole 260 is formed in the second ground line 220 so that the second feed transmission line 240 does not contact the second ground 220 when the second feed transmission line 240 is wired to the lower portion of the second dielectric substrate 210. [ And may have a size larger than that of the second feeder transmission line 240.

According to an embodiment of the present invention, one end of the first feed transmission line 140 disposed in the first radiation device 100 and the second feed transmission line 240 disposed in the second radiation device 200 It can be designed and manufactured in bent or bent form. The first feed transmission line 140 and the second feed transmission line 240 may be disposed such that the directions of the first and second feed transmission lines 240 and 240 face each other when they are disposed on the first dielectric substrate 110 and the second dielectric substrate 210 .

FIG. 6 is a view for explaining an example of arrangement of the first feed transmission line 140 and the second feed transmission line 240. FIG.

Referring to FIG. 6, one end of the first feed transmission line 140 and the second feed transmission line 240 have the same shape bent at an angle of 90 degrees. The first feed transmission line 140 and the second feed transmission line 240 are symmetrical with respect to the center of the radiation element array 10 so that the first dielectric substrate 110 and the second dielectric substrate 210 are symmetrical with respect to the center of the radiation element array 10. [ . The center of the radiation element array 10 may be a portion where the first radiation element 100 and the second radiation element 200 are connected.

At this time, the feeding to the first feeding transmission line 140 is provided at a phase difference of 180 degrees by a stator (not shown), so that the phases of the patterns of the first and second radiation elements 100 and 200 Can be compensated.

The single radiation element has an asymmetrical radiation pattern (or radiation pattern) characteristic, but by forming upper and lower symmetrical radiation patterns in space, the electromagnetic fields are summed in the same phase at the same distance in the far-field condition .

Therefore, by applying the radiation element array 10 according to the embodiment of the present invention to the phased array radar, it is possible to have symmetrical radiation pattern characteristics in the elevation direction as shown in Fig. That is, it can be seen that the maximum value is formed at 0 degree. The result is that when the peer identification antenna emits radiation toward the target, an error (for example, 0.3 degrees) is not generated as in the conventional method, thereby enabling precise beam steering.

The radiation element array 10 described with reference to FIGS. 2 to 6 is arranged so that the first feed transmission line 140 and the second feed transmission line 240 are opposed to each other with their bent directions facing each other, May be disposed so that their bent directions are opposed to each other with their outward faces. Even in this case, the phase of the current fed to one radiation element can be changed by 180 degrees for a symmetrical radiation pattern in the elevation angle in space.

FIG. 8 is a block diagram schematically illustrating a peer identification antenna 800 for implementing a high-angle symmetric radiation pattern according to an embodiment of the present invention.

8, a peer identification antenna 800 according to an embodiment of the present invention may include a radiation element array 810, a displacer 820, and a power divider 830. [

The radiation element array 810 is formed so that a plurality of double-sided board type dipole radiation elements including the first double-sided and first double-sided board type dipole radiation elements 100 and 200 transmit and receive electromagnetic waves toward the target . The first feed transmission line 140 and the second feed transmission line 240 formed in the first double-sided substrate type dipole radiation element 100 and the second double-sided substrate type dipole radiation element 200 are connected to the radiation element array 810, As shown in FIG.

The first double-sided board type dipole radiating element 100 and the second double-sided board type dipole radiating element 200 are the first radiating element 100 and the second radiating element 200 described with reference to Figs. 2 to 7, respectively And the radiation element array 810 is a radiation element array 10, and a detailed description thereof will be omitted.

The displacer 820 can be applied with a phase difference of 180 degrees to the electric current supplied to the first double-sided substrate type dipole radiator 100. As a result, the radiation patterns of the first and second double-faced dipole radiating elements 100 and 200 are not canceled but have symmetrical radiation pattern characteristics in the high-angle direction in space as in Fig. 7 .

The power distributor 830 distributes power supplied to the first feed transmission line 140 and the second feed transmission line 240.

The above-described peer identification antenna 800 can be applied to active phased array radar or passive phased array radar, and the peer identification antenna provided in the radar can improve the beam steering accuracy and the transmission / reception gain for the target and the receiver.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the present invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that numerous modifications and variations can be made to the present invention without departing from the scope of the present invention. Accordingly, all such modifications and variations are intended to be included within the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Radiation element array
100: first radiation element
110: first dielectric substrate
120: Ground 1
130: first dipole antenna
140: first feed transmission line
150: foam
160: first wiring hole
200: second radiation element
210: second dielectric substrate
220: Ground 2
230: second dipole antenna
240: second feed transmission line
260: second wiring hole

Claims (6)

A radiating element array of a peer identification antenna for realizing a high-angle symmetrical radiation pattern,
A first dipole antenna is formed on one surface of the first dielectric substrate, a first feed transmission line is formed on the other surface of the first dielectric substrate, and a first feed transmission line and a first feed transmission line are connected to the first feed transmission line and the first dipole antenna, Radiation element; And
A second dipole antenna is formed on one surface of both surfaces of the second dielectric substrate, a second feed transmission line is formed on the other surface of the second dielectric substrate, and a second feed line is provided through the second feed point to the second feed transmission line and the second dipole antenna. A radiation element,
Wherein the first radiation element and the second radiation element are arranged in one row for phased array radar and the first feed transmission line and the second feed transmission line are formed symmetrically with respect to the center of the radiation element array ,
Wherein the first radiation element comprises:
A second dielectric substrate disposed in the middle of the first dielectric substrate to form a tenth shape with the first dielectric substrate, And a first ground disposed in the form of a first ground,
Wherein a space between a lower portion of the first dielectric substrate and the first ground is filled with a foam having a dielectric constant. The method according to claim 1,
Wherein one end of each of the first feed transmission line and the second feed transmission line is designed in a bent shape and arranged so that bent directions of the first and second feed transmission lines are opposite to each other when formed in the first dielectric substrate and the second dielectric substrate, And the radiating element array is symmetrically formed with respect to the radiating element array.
The method according to claim 1,
Wherein the power feeding to the first feeder transmission line is performed with a phase difference of 180 degrees by means of a stator to compensate the phase of pattern synthesis between the first radiation element and the second radiation element. Radiation element array.
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KR1020180043384A 2018-04-13 2018-04-13 IFF antenna and Radiating element for implementation of symmetric elevation radiation pattern of IFF antenna KR101874103B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102104644B1 (en) * 2019-11-21 2020-04-24 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with high permittivity substrate
KR102103841B1 (en) * 2019-11-21 2020-04-24 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with adjustable transmission line
KR102222207B1 (en) * 2020-04-20 2021-03-04 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with high permittivity substrate
KR102224381B1 (en) * 2020-04-14 2021-03-09 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with adjustable transmission line

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100630331B1 (en) * 2004-06-11 2006-10-02 (주)더블유엘호스트 The Antenna Apparatus Using Resin Divider And Feeder Panel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100630331B1 (en) * 2004-06-11 2006-10-02 (주)더블유엘호스트 The Antenna Apparatus Using Resin Divider And Feeder Panel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102104644B1 (en) * 2019-11-21 2020-04-24 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with high permittivity substrate
KR102103841B1 (en) * 2019-11-21 2020-04-24 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with adjustable transmission line
KR102224381B1 (en) * 2020-04-14 2021-03-09 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with adjustable transmission line
KR102222207B1 (en) * 2020-04-20 2021-03-04 한화시스템 주식회사 Identification of friend or foe apparatus for next generation destroyer having phased array iff antenna and its down-tilt control unit with high permittivity substrate

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