WO2011162535A1 - Radar antenna capable of radiating dual polarization and radar system including same - Google Patents

Radar antenna capable of radiating dual polarization and radar system including same Download PDF

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Publication number
WO2011162535A1
WO2011162535A1 PCT/KR2011/004528 KR2011004528W WO2011162535A1 WO 2011162535 A1 WO2011162535 A1 WO 2011162535A1 KR 2011004528 W KR2011004528 W KR 2011004528W WO 2011162535 A1 WO2011162535 A1 WO 2011162535A1
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Prior art keywords
feeder
activated
spiral radiator
radar
radiator
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PCT/KR2011/004528
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French (fr)
Korean (ko)
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김진명
정창원
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주식회사 모비텍
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Publication of WO2011162535A1 publication Critical patent/WO2011162535A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/12—Resonant antennas
    • H01Q11/14—Resonant antennas with parts bent, folded, shaped or screened or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the antenna or to obtain desired polarisation effect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • 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
    • H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation 

Definitions

  • the present invention relates to an antenna, and more particularly, to an antenna capable of dual polarized radiation and a radar system including the same.
  • Radar system is mainly used to detect the distance, position, etc. from the target object by radiating the radio wave to the free space using the antenna and then receiving the radio wave reflected from the target object.
  • Radar systems have been used mainly in large systems such as military radars and weather observations, but in recent years, they have been used in smaller systems such as vehicle rear sensors and space recognition.
  • Radar systems use antennas for the emission and reception of signals, and various types of antennas such as horn antennas and patch antennas are used as radar antennas.
  • polarization represents a specific property of the vibration direction in the electromagnetic wave, there is a linear polarization, circular polarization and the like.
  • circular polarization is classified into right handed circular polarization (RHCP) and left handed circular polarization (LHCP) according to the rotation direction of vibration. Radar detection systems used to detect objects or spaces are most effective when monitoring targets with various polarizations.
  • a single radiator is used as a conventional radar antenna, it is common to perform a sensing function using only one polarization.
  • the radar detection function is performed through an antenna including two radiators as shown in FIG. 1.
  • FIG. 1 is a diagram illustrating a conventional radar detection system by dual polarization.
  • the conventional radar detection system 100 includes a left handed circular polarization (LHCP) antenna 110, a right handed circular polarization (RHCP) antenna 112, and a signal processor 114.
  • LHCP left handed circular polarization
  • RHCP right handed circular polarization
  • the LHCP antenna 110 radiates and receives beams having LHCP polarization characteristics
  • the RHCP antenna 112 radiates and receives beams having RHCP polarization characteristics.
  • the target area is first scanned by radiating the beam of the LHCP antenna 110, the target delay is scanned by radiating the beam of the RHCP antenna 112, and the information reflected after the scan is collected to detect the target area. It works in a way.
  • the present invention proposes a radar antenna capable of dual polarized radiation with a single antenna radiator.
  • the present invention provides a radar antenna capable of accurately detecting a target object with a relatively compact and low-cost structure.
  • a single arm spiral radiator A first feeding part electromagnetically coupled to the center of the single arm spiral radiator; And a second feeder electromagnetically coupled to an end of the single arm spiral radiator, wherein the first feeder is provided with a radar antenna capable of dual polarization radiation in which the second feeder is alternately activated.
  • the spiral emitter emits a first circularly polarized signal when the first feeder is activated, and the spiral emitter emits a second circularly polarized signal opposite to the first circularly polarized signal when the second feeder is activated. .
  • the second feeder When the first feeder is activated, the second feeder is deactivated and the end of the spiral radiator is electrically terminated.
  • the first feeder When the second feeder is activated, the first feeder is deactivated and the center of the spiral radiator is electrically terminated.
  • a single arm spiral radiator A first feeding part electromagnetically coupled to the center of the single arm spiral radiator; A second feed portion electromagnetically coupled to an end of the single arm spiral radiator;
  • a radar system capable of dual polarized radiation including a controller for controlling activation of the first feed part and the second feed part.
  • the antenna of the present invention dual polarized radiation is possible with a single antenna radiator, and it has an advantage of accurately detecting a target object with a miniaturized and low-cost structure.
  • FIG. 1 is a diagram illustrating a conventional radar detection system by dual polarization.
  • FIG. 2 is a diagram illustrating a structure of a radar antenna capable of dual polarized radiation according to an embodiment of the present invention.
  • FIG. 3 is a diagram illustrating beam patterns and polarizations emitted when a first feed part is activated in a radar antenna according to an exemplary embodiment of the present invention.
  • FIG. 4 is a diagram illustrating beam patterns and polarizations emitted when a second feeder is activated in a radar antenna according to an exemplary embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating an operation of a radar system to which a radar antenna is applied according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a structure of a radar antenna capable of dual polarization radiation according to an embodiment of the present invention.
  • a radar antenna capable of dual polarized radiation includes a single arm spiral radiator 200, a first feed part 202, and a second feed part 204.
  • the single arm spiral radiator 200 is a spiral type radiator composed of only one arm, and the spiral radiator may be implemented in a form having two or more arms, but the spiral radiator 200 used in the present invention is a single arm. It is implemented as a spiral emitter.
  • the spiral radiator is a radiator having a structure in which the radius is continuously increased with respect to the center, and is one of radiators capable of securing a sufficient electric length while occupying a relatively small space.
  • spiral radiator Although a circular spiral radiator is illustrated in FIG. 2, the shape of the spiral radiator is not limited thereto, and various known spiral radiators such as a square may be used.
  • the first feeder 202 is electromagnetically coupled to provide a feed signal
  • the second feeder 204 is electromagnetically coupled to the feed signal. To provide.
  • the inventors of the present invention have verified through the experiment that the polarization of the signal emitted when providing the feed signal in the center of the spiral antenna and the polarization of the signal emitted when providing the feed signal to the end of the spiral antenna through experiments.
  • the present invention proposes a radar antenna using the characteristics verified by the inventors.
  • the feeders 202 and 204 are coupled to both the center and the end of the spiral radiator.
  • the first RF signal radiated by the feed signal of the first feeder 202 and the second RF signal radiated by the feed signal of the second feeder 204 may have polarizations in opposite directions in circular polarization. do.
  • the first RF signal radiated by the feed signal of the first feed part has an RHCP polarization
  • the second RF signal radiated by the feed signal of the second feed part has an LHCP polarization.
  • the first RF signal radiated by the feed signal of the first feeder has an LHCP polarization
  • the second RF signal radiated by the feed signal of the second feeder has an RHCP polarization.
  • the first feed section 202 and the second feed section 204 are alternately activated to provide an RF signal for detection.
  • activation and deactivation of the first feeder 202 and the second feeder 204 may be controlled by a separate controller (not shown).
  • FIG. 3 is a diagram illustrating beam patterns and polarizations emitted when a first feeder is activated in a radar antenna according to an exemplary embodiment of the present invention.
  • the first feeder 202 coupled to the center of the spiral radiator is activated to provide a feed signal to the spiral radiator, and the second feeder 204 is inactivated to terminate the spiral radiator. To the termination state.
  • the spiral radiator 200 emits an RF signal having an RHCP polarization, as shown in FIG. 3 (of course, the RF signal may have an LHCP polarization according to the rotation direction of the spiral radiator).
  • FIG. 4 is a diagram illustrating beam patterns and polarizations emitted when a second feeder is activated in a radar antenna according to an exemplary embodiment of the present invention.
  • the first feeder 202 coupled to the center of the spiral emitter is inactive so that the center of the spoiler emitter is terminated, and the second feeder is activated to provide a feed signal to the spiral emitter.
  • FIG. 5 is a flowchart illustrating an operation of a radar system to which a radar antenna is applied according to an embodiment of the present invention.
  • the radar system first activates the first feeder and deactivates the second feeder such that the second feeder is electrically terminated (step 500).
  • the radar antenna of the present invention receives a feed signal of the first feeder and emits a beam having an RHCP polarization (may radiate a beam having LHCP polarization that is daughter to the structure of the spiral radiator). The reflection signal is thus received (step 502).
  • the second feeder After receiving the reflected signal of the RHCP polarized beam according to the activation of the first feeder, the second feeder is activated and the first feeder is deactivated to be in an electrically terminated state (step 504).
  • the radar antenna of the present invention receives the feed signal of the second feeder and emits a beam having a polarization opposite to that when the first feeder is activated (ie, LHCP polarization) and thus reflects it. Receive the signal (step 506).
  • the radar system collects the reflected signal when the first feeder is activated and the reflected signal when the second feeder is activated to generate sensing information for the target area (step 508).

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Disclosed is a radar antenna capable of radiating dual polarization. The disclosed antenna comprises: a one-arm spiral radiator; a first feeding unit which is electromagnetically coupled to the center of the one-arm spiral radiator; and a second feeding unit which is electromagnetically coupled to the end of the one-arm spiral radiator, wherein the first feeding unit and the second feeding unit are alternately activated. According to the disclosed antenna, a single antenna radiator can radiate dual polarization radiation and provides the advantages of precisely detecting an object using a smaller and low-cost structure.

Description

이중 편파 방사가 가능한 레이더 안테나 및 이를 포함하는 레이더 시스템Radar antenna capable of dual polarized radiation and radar system including the same
본 발명은 안테나에 관한 것으로서, 더욱 상세하게는 이중 편파 방사가 가능한 안테나 및 이를 포함하는 레이더 시스템에 관한 것이다. The present invention relates to an antenna, and more particularly, to an antenna capable of dual polarized radiation and a radar system including the same.
레이더 시스템은 안테나를 이용하여 전파를 자유공간으로 방사한 후 목표 물체로부터 반사되어 오는 전파를 수신함으로써 목표 물체와의 거리, 위치 등을 감지하는데 주로 사용된다. Radar system is mainly used to detect the distance, position, etc. from the target object by radiating the radio wave to the free space using the antenna and then receiving the radio wave reflected from the target object.
레이더 시스템은 군사용 레이더, 기상 관측과 같은 대형 시스템에 주로 이용되었으나, 근래에는 차량 후면 감지기 및 공간 인식 등과 같은 소형 시스템에도 이용되면서 점차 사용 범위가 넓어지고 있다. Radar systems have been used mainly in large systems such as military radars and weather observations, but in recent years, they have been used in smaller systems such as vehicle rear sensors and space recognition.
레이더 시스템은 신호의 방사 및 수신을 위해 안테나를 필수적으로 사용하며, 레이더용 안테나로는 혼 안테나, 패치 안테나 등 다양한 종류의 안테나가 사용된다. Radar systems use antennas for the emission and reception of signals, and various types of antennas such as horn antennas and patch antennas are used as radar antennas.
한편, 편파(Polarization)는 전자기파에서 진동 방향이 갖는 특정한 성질을 나타내는 것으로서, 직선 편파, 원형 편파 등이 있다. 또한, 원형 편파는 진동의 회전 방향에 따라 RHCP(Right Handed Circular Polarization) 및 LHCP(Left Handed Circular Polarization)으로 구분된다. 물체 또는 공간의 감지에 이용되는 레이더 감지 시스템은 다양한 편파로 타겟을 감시할 때 가장 큰 효과를 얻을 수 있다. On the other hand, polarization (Polarization) represents a specific property of the vibration direction in the electromagnetic wave, there is a linear polarization, circular polarization and the like. In addition, circular polarization is classified into right handed circular polarization (RHCP) and left handed circular polarization (LHCP) according to the rotation direction of vibration. Radar detection systems used to detect objects or spaces are most effective when monitoring targets with various polarizations.
종래의 레이더용 안테나로는 단일 방사체가 사용되었기 때문에, 하나의 편파만을 이용하여 감지 기능을 수행하는 것이 일반적이었다. 또한, 정확한 감지가 필요한 곳에서는 도 1과 같은 두 개의 방사체를 포함하는 안테나를 통해 레이더 감지 기능이 수행되었다. Since a single radiator is used as a conventional radar antenna, it is common to perform a sensing function using only one polarization. In addition, where accurate detection is required, the radar detection function is performed through an antenna including two radiators as shown in FIG. 1.
도 1은 종래의 이중 편파에 의한 레이더 감지 시스템을 도시한 도면이다. 1 is a diagram illustrating a conventional radar detection system by dual polarization.
도 1을 참조하면, 종래의 레이더 감지 시스템(100)은 LHCP(Left Handed Circular Polarization) 안테나(110), RHCP(Right Handed Circular Polarization) 안테나(112) 및 신호처리부(114)를 포함한다. Referring to FIG. 1, the conventional radar detection system 100 includes a left handed circular polarization (LHCP) antenna 110, a right handed circular polarization (RHCP) antenna 112, and a signal processor 114.
LHCP 안테나(110)는 LHCP 편파 특성을 가진 빔을 방사하고 수신하며, RHCP 안테나(112)는 RHCP 편파 특성을 가진 빔을 방사하고 수신한다. The LHCP antenna 110 radiates and receives beams having LHCP polarization characteristics, and the RHCP antenna 112 radiates and receives beams having RHCP polarization characteristics.
이와 같은 시스템에서 우선 LHCP 안테나(110)의 빔을 방사하여 타겟 지역을 스캔하고, RHCP 안테나(112)의 빔을 방사하여 타겟 지연을 스캔한 후 스캔 후 반사되는 정보를 취합하여 타겟 지역을 감지하는 방식으로 동작한다. In such a system, the target area is first scanned by radiating the beam of the LHCP antenna 110, the target delay is scanned by radiating the beam of the RHCP antenna 112, and the information reflected after the scan is collected to detect the target area. It works in a way.
이와 같이 두 개의 서로 다른 편파를 가진 빔을 통해 레이더의 감지 기능을 수행하려면 두 개의 안테나 방사체를 필요로 하는 바, 전체적인 시스템의 사이즈 및 비용이 증가할 수 밖에 없는 문제점이 있었다. As such, two antenna radiators are required to perform radar detection through two differently polarized beams, resulting in an increase in size and cost of the overall system.
본 발명에서는 단일 안테나 방사체로 이중 편파 방사가 가능한 레이더용 안테나를 제안한다. The present invention proposes a radar antenna capable of dual polarized radiation with a single antenna radiator.
또한, 본 발명은 비교적 소형화 및 저비용의 구조를 가지고 대상 물체를 정확하게 탐지할 수 있는 레이더용 안테나를 제공한다. In addition, the present invention provides a radar antenna capable of accurately detecting a target object with a relatively compact and low-cost structure.
본 발명의 일 측면에 따르면, 단일 아암 스파이럴 방사체; 상기 단일 아암 스파이럴 방사체의 중심에 전자기적으로 결합되는 제1 급전부; 및 상기 단일 아암 스파이럴 방사체의 종단에 전자기적으로 결합되는 제2 급전부를 포함하되, 상기 제1 급전부는 상기 제2 급전부는 교대로 활성화되는 이중 편파 방사가 가능한 레이더 안테나가 제공된다. According to one aspect of the invention, a single arm spiral radiator; A first feeding part electromagnetically coupled to the center of the single arm spiral radiator; And a second feeder electromagnetically coupled to an end of the single arm spiral radiator, wherein the first feeder is provided with a radar antenna capable of dual polarization radiation in which the second feeder is alternately activated.
상기 제1 급전부가 활성화될 때 상기 스파이럴 방사체는 제1 원형 편파 신호를 방사하고, 상기 제2 급전부가 활성화될 때 상기 스파이럴 방사체는 상기 제1 원형 편파 신호와 반대인 제2 원형 편파 신호를 방사한다. The spiral emitter emits a first circularly polarized signal when the first feeder is activated, and the spiral emitter emits a second circularly polarized signal opposite to the first circularly polarized signal when the second feeder is activated. .
상기 제1 급전부가 활성화될 때 상기 제2 급전부는 비활성화되고 상기 스파이럴 방사체의 종단은 전기적으로 터미네이션 상태가 된다. When the first feeder is activated, the second feeder is deactivated and the end of the spiral radiator is electrically terminated.
상기 제2 급전부가 활성화될 때 상기 제1 급전부는 비활성화되고 상기 스파이럴 방사체의 중심은 전기적으로 터미네이션 상태가 된다. When the second feeder is activated, the first feeder is deactivated and the center of the spiral radiator is electrically terminated.
본 발명의 다른 측면에 따르면, 단일 아암 스파이럴 방사체; 상기 단일 아암 스파이럴 방사체의 중심에 전자기적으로 결합되는 제1 급전부; 상기 단일 아암 스파이럴 방사체의 종단에 전자기적으로 결합되는 제2 급전부; 상기 제1 급전부 및 상기 제2 급전부의 활성화를 제어하는 컨트롤러를 포함하는 이중 편파 방사가 가능한 레이더 시스템이 제공된다. According to another aspect of the invention, a single arm spiral radiator; A first feeding part electromagnetically coupled to the center of the single arm spiral radiator; A second feed portion electromagnetically coupled to an end of the single arm spiral radiator; Provided is a radar system capable of dual polarized radiation including a controller for controlling activation of the first feed part and the second feed part.
본 발명의 안테나에 의하면, 단일 안테나 방사체로 이중 편파 방사가 가능하며, 소형화 및 저비용의 구조를 가지고 대상 물체를 정확하게 탐지할 수 있는 장점이 있다. According to the antenna of the present invention, dual polarized radiation is possible with a single antenna radiator, and it has an advantage of accurately detecting a target object with a miniaturized and low-cost structure.
도 1은 종래의 이중 편파에 의한 레이더 감지 시스템을 도시한 도면.1 is a diagram illustrating a conventional radar detection system by dual polarization.
도 2는 본 발명의 일 실시예에 따른 이중 편파 방사가 가능한 레이터 안테나의 구조를 도시한 도면.2 is a diagram illustrating a structure of a radar antenna capable of dual polarized radiation according to an embodiment of the present invention.
도 3은 본 발명의 일 실시예에 따른 레이더 안테나에서 제1 급전부가 활성화될 경우에 방사되는 빔 패턴 및 편파를 도시한 도면.3 is a diagram illustrating beam patterns and polarizations emitted when a first feed part is activated in a radar antenna according to an exemplary embodiment of the present invention.
도 4는 본 발명의 일 실시예에 따른 레이더 안테나에서 제2 급전부가 활성화될 경우에 방사되는 빔 패턴 및 편파를 도시한 도면.4 is a diagram illustrating beam patterns and polarizations emitted when a second feeder is activated in a radar antenna according to an exemplary embodiment of the present invention.
도 5는 본 발명의 일 실시예에 따른 레이더 안테나가 적용되는 레이더 시스템이 동작을 도시한 순서도.5 is a flowchart illustrating an operation of a radar system to which a radar antenna is applied according to an embodiment of the present invention.
이하에서, 첨부된 도면을 참조하여 본 발명에 의한 이중 편파 방사가 가능한 레이더 안테나의 바람직한 실시예를 상세히 설명한다. Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a radar antenna capable of dual polarization radiation according to the present invention.
도 2는 본 발명의 일 실시예에 따른 이중 편파 방사가 가능한 레이터 안테나의 구조를 도시한 도면이다. 2 is a diagram illustrating a structure of a radar antenna capable of dual polarization radiation according to an embodiment of the present invention.
도 2를 참조하면 본 발명의 일 실시예에 따른 이중 편파 방사가 가능한 레이더 안테나는 단일 아암 스파이럴 방사체(200), 제1 급전부(202) 및 제2 급전부(204)를 포함한다. Referring to FIG. 2, a radar antenna capable of dual polarized radiation according to an embodiment of the present invention includes a single arm spiral radiator 200, a first feed part 202, and a second feed part 204.
단일 아암 스파이럴 방사체(200)는 하나의 아암으로만 구성되는 스파이럴 형태의 방사체로서, 스파이럴 방사체는 둘 또는 그 이상의 아암을 가지는 형태로 구현될 수도 있으나 본 발명에 사용되는 스파이럴 방사체(200)는 단일 아암으로 구현되는 스파이럴 방사체이다. The single arm spiral radiator 200 is a spiral type radiator composed of only one arm, and the spiral radiator may be implemented in a form having two or more arms, but the spiral radiator 200 used in the present invention is a single arm. It is implemented as a spiral emitter.
스파이럴 방사체는 중심을 기준으로 계속적으로 반경이 커지는 형태를 가지는 구조의 방사체로서 비교적 작은 공간을 점유하면서 충분한 전기적 길이를 확보할 수 있는 방사체의 하나이다. The spiral radiator is a radiator having a structure in which the radius is continuously increased with respect to the center, and is one of radiators capable of securing a sufficient electric length while occupying a relatively small space.
도 2에는 원형의 스파이럴 방사체가 도시되어 있으나, 스파이럴 방사체의 형태가 이에 한정되는 것은 아니며, 사각형 등과 같은 알려진 다양한 형태의 스파이럴 방사체가 이용될 수 있다. Although a circular spiral radiator is illustrated in FIG. 2, the shape of the spiral radiator is not limited thereto, and various known spiral radiators such as a square may be used.
스파이럴 방사체(200)의 중심에는 제1 급전부(202)가 전자기적으로 결합되어 급전 신호를 제공하고, 스파이럴 방사체(200)의 종단에는 제2 급전부(204)가 전자기적으로 결합되어 급전 신호를 제공한다. At the center of the spiral radiator 200, the first feeder 202 is electromagnetically coupled to provide a feed signal, and at the end of the spiral radiator 200, the second feeder 204 is electromagnetically coupled to the feed signal. To provide.
본 발명의 발명자는 스파이럴 안테나의 중심에 급전 신호를 제공할 때 방사되는 신호의 편파와 스파이럴 안테나의 종단에 급전 신호를 제공할 때 방사되는 신호의 편파가 상이하다는 특성을 실험을 통해 검증하였으며, 본 발명은 본 발명자에 의해 검증된 특성을 이용한 레이더 안테나를 제안한다. The inventors of the present invention have verified through the experiment that the polarization of the signal emitted when providing the feed signal in the center of the spiral antenna and the polarization of the signal emitted when providing the feed signal to the end of the spiral antenna through experiments. The present invention proposes a radar antenna using the characteristics verified by the inventors.
본 발명의 실시예에 따른 레이더 안테나는 일반적인 스파이럴 안테나와는 달리 스파이럴 방사체의 중심 및 종단에 모두 급전부(202, 204)가 결합된다. 이때, 제1 급전부(202)의 급전 신호에 의해 방사되는 제1 RF 신호와 제2 급전부(204)의 급전 신호에 의해 방사되는 제2 RF 신호는 원형 편파에서 서로 반대 방향의 편파를 가지게 된다. 예를 들어, 제1 급전부의 급전 신호에 의해 방사되는 제1 RF 신호가 RHCP 편파를 가질 경우, 제2 급전부의 급전 신호에 의해 방사되는 제2 RF 신호는 LHCP 편파를 가진다. 또한, 제1 급전부의 급전 신호에 의해 방사되는 제1 RF 신호가 LHCP 편파를 가질 경우, 제2 급전부의 급전 신호에 의해 방사되는 제2 RF 신호는 RHCP 편파를 가지게 된다. In the radar antenna according to the exemplary embodiment of the present invention, unlike the general spiral antenna, the feeders 202 and 204 are coupled to both the center and the end of the spiral radiator. In this case, the first RF signal radiated by the feed signal of the first feeder 202 and the second RF signal radiated by the feed signal of the second feeder 204 may have polarizations in opposite directions in circular polarization. do. For example, when the first RF signal radiated by the feed signal of the first feed part has an RHCP polarization, the second RF signal radiated by the feed signal of the second feed part has an LHCP polarization. In addition, when the first RF signal radiated by the feed signal of the first feeder has an LHCP polarization, the second RF signal radiated by the feed signal of the second feeder has an RHCP polarization.
제1 급전부 또는 제2 급전부에 의해 방사되는 신호가 어떠한 편파를 가질지 여부는 스파이럴 방사체의 회전 방향에 의해 결정된다. Which polarization the signal emitted by the first feed portion or the second feed portion has is determined by the rotational direction of the spiral radiator.
본 발명의 바람직한 실시예에 따르면, 제1 급전부(202)와 제2 급전부(204)는 교대로 활성화되어 탐지를 위한 RF 신호를 제공한다. 이때, 제1 급전부(202) 및 제2 급전부(204)의 활성화 및 비활성화는 별도의 컨트롤러(미도시)에 의해 제어될 수 있을 것이다. According to a preferred embodiment of the present invention, the first feed section 202 and the second feed section 204 are alternately activated to provide an RF signal for detection. In this case, activation and deactivation of the first feeder 202 and the second feeder 204 may be controlled by a separate controller (not shown).
도 3은 본 발명의 일 실시예에 따른 레이더 안테나에서 제1 급전부가 활성화될 경우에 방사되는 빔 패턴 및 편파를 도시한 도면이다. 3 is a diagram illustrating beam patterns and polarizations emitted when a first feeder is activated in a radar antenna according to an exemplary embodiment of the present invention.
도 3을 참조하면, 스파이럴 방사체의 중심에 결합된 제1 급전부(202)는 활성화된 상태여서 급전 신호를 스파이럴 방사체에 제공하며, 제2 급전부(204)는 비활성화되어 스파이럴 방사체의 종단은 전기적으로 터미네이션 상태가 되도록 한다. Referring to FIG. 3, the first feeder 202 coupled to the center of the spiral radiator is activated to provide a feed signal to the spiral radiator, and the second feeder 204 is inactivated to terminate the spiral radiator. To the termination state.
이때, 스파이럴 방사체(200)는 도 3에 도시된 바와 같이, RHCP 편파를 가진 RF 신호를 방사한다(물론, RF 신호는 스파이럴 방사체의 회전 방향에 따라 LHCP 편파를 가질 수도 있다). At this time, the spiral radiator 200 emits an RF signal having an RHCP polarization, as shown in FIG. 3 (of course, the RF signal may have an LHCP polarization according to the rotation direction of the spiral radiator).
도 4는 본 발명의 일 실시예에 따른 레이더 안테나에서 제2 급전부가 활성화될 경우에 방사되는 빔 패턴 및 편파를 도시한 도면이다. FIG. 4 is a diagram illustrating beam patterns and polarizations emitted when a second feeder is activated in a radar antenna according to an exemplary embodiment of the present invention.
도 4를 참조하면, 스파이럴 방사체의 중심에 결합된 제1 급전부(202)는 비활성되어 스파일러 방사체의 중심은 터미네이션 상태가 되고, 제2 급전부는 활성화되어 급전 신호를 스파이럴 방사체에 제공한다. Referring to FIG. 4, the first feeder 202 coupled to the center of the spiral emitter is inactive so that the center of the spoiler emitter is terminated, and the second feeder is activated to provide a feed signal to the spiral emitter.
도 3과 같이, 제1 급전부가 활성화되어 RHCP 편파를 가진 RF 신호를 방사할 경우, 도 4와 같이 제2 급전부가 활성화될 때에는 LHCP 편파를 가진 RF 신호가 방사된다. As shown in FIG. 3, when the first feeder is activated to radiate an RF signal with RHCP polarization, when the second feeder is activated as shown in FIG. 4, an RF signal with LHCP polarization is emitted.
도 5는 본 발명의 일 실시예에 따른 레이더 안테나가 적용되는 레이더 시스템이 동작을 도시한 순서도이다. 5 is a flowchart illustrating an operation of a radar system to which a radar antenna is applied according to an embodiment of the present invention.
도 5를 참조하면, 우선 레이더 시스템은 제1 급전부를 활성화하고 제2 급전부를 비활성화화여 제2 급전부가 전기적으로 터미네이션 상태가 되도록 한다(단계 500).Referring to FIG. 5, the radar system first activates the first feeder and deactivates the second feeder such that the second feeder is electrically terminated (step 500).
제1 급전부가 활성화되면, 본 발명의 레이더 안테나는 제1 급전부의 급전 신호를 제공받아 RHCP 편파(스파이럴 방사체의 구조에 딸 LHCP 편파를 가진 빔을 방사할 수도 있음)를 가진 빔을 방사하며, 이에 따른 반사 신호를 수신한다(단계 502). When the first feeder is activated, the radar antenna of the present invention receives a feed signal of the first feeder and emits a beam having an RHCP polarization (may radiate a beam having LHCP polarization that is daughter to the structure of the spiral radiator). The reflection signal is thus received (step 502).
제1 급전부의 활성화에 따른 RHCP 편파 빔의 반사 신호를 수신한 후, 제2 급전부를 활성화하고 제1 급전부를 비활성화하여 전기적으로 터미네이션 상태가 되도록 한다(단계 504). After receiving the reflected signal of the RHCP polarized beam according to the activation of the first feeder, the second feeder is activated and the first feeder is deactivated to be in an electrically terminated state (step 504).
제2 급전부가 활성화되면, 본 발명의 레이더 안테나는 제2 급전부의 급전 신호를 제공받아 제1 급전부가 활성화될 때와는 반대의 편파(즉, LHCP 편파)를 가진 빔을 방사하고 이에 따른 반사 신호를 수신한다(단계 506). When the second feeder is activated, the radar antenna of the present invention receives the feed signal of the second feeder and emits a beam having a polarization opposite to that when the first feeder is activated (ie, LHCP polarization) and thus reflects it. Receive the signal (step 506).
레이더 시스템은 제1 급전부가 활성화될 경우의 반사 신호 및 제2 급전부가 활성화될 경우의 반사 신호를 취합하여 타겟 지역에 대한 감지 정보를 생성한다(단계 508). The radar system collects the reflected signal when the first feeder is activated and the reflected signal when the second feeder is activated to generate sensing information for the target area (step 508).
상기에서는 본 발명의 실시예를 참조하여 설명하였지만, 해당 기술분야에서 통상의 지식을 가진 자라면 하기의 특허 청구의 범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다. Although the above has been described with reference to embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

Claims (8)

  1. 단일 아암 스파이럴 방사체;Single arm spiral emitters;
    상기 단일 아암 스파이럴 방사체의 중심에 전자기적으로 결합되는 제1 급전부; 및A first feeding part electromagnetically coupled to the center of the single arm spiral radiator; And
    상기 단일 아암 스파이럴 방사체의 종단에 전자기적으로 결합되는 제2 급전부를 포함하되,A second feed portion electromagnetically coupled to an end of the single arm spiral radiator,
    상기 제1 급전부는 상기 제2 급전부는 교대로 활성화되는 것을 특징으로 하는 이중 편파 방사가 가능한 레이더 안테나, The first feeder is a radar antenna capable of dual polarization radiation, characterized in that the second feeder is alternately activated,
  2. 제1항에 있어서,The method of claim 1,
    상기 제1 급전부가 활성화될 때 상기 스파이럴 방사체는 제1 원형 편파 신호를 방사하고, 상기 제2 급전부가 활성화될 때 상기 스파이럴 방사체는 상기 제1 원형 편파 신호와 반대인 제2 원형 편파 신호를 방사하는 것을 특징으로 하는 이중 편파 방사가 가능한 레이더 안테나. The spiral radiator emits a first circularly polarized signal when the first feeder is activated, and the spiral radiator radiates a second circularly polarized signal opposite to the first circularly polarized signal when the second feeder is activated. Radar antenna capable of dual polarization radiation, characterized in that.
  3. 제2항에 있어서, The method of claim 2,
    상기 제1 급전부가 활성화될 때 상기 제2 급전부는 비활성화되고 상기 스파이럴 방사체의 종단은 전기적으로 터미네이션 상태가 되는 것을 특징으로 하는 이중 편파 방사가 가능한 레이더 안테나. And the second feeder is deactivated when the first feeder is activated, and the end of the spiral radiator is electrically terminated.
  4. 제3항에 있어서, The method of claim 3,
    상기 제2 급전부가 활성화될 때 상기 제1 급전부는 비활성화되고 상기 스파이럴 방사체의 중심은 전기적으로 터미네이션 상태가 되는 것을 특징으로 하는 이중 편파 방사 가능한 레이더 안테나. And the first feed part is deactivated when the second feed part is activated, and the center of the spiral radiator is in an electrically terminated state.
  5. 단일 아암 스파이럴 방사체;Single arm spiral emitters;
    상기 단일 아암 스파이럴 방사체의 중심에 전자기적으로 결합되는 제1 급전부; A first feeding part electromagnetically coupled to the center of the single arm spiral radiator;
    상기 단일 아암 스파이럴 방사체의 종단에 전자기적으로 결합되는 제2 급전부; A second feed portion electromagnetically coupled to an end of the single arm spiral radiator;
    상기 제1 급전부 및 상기 제2 급전부의 활성화를 제어하는 컨트롤러를 포함하는 것을 특징으로 하는 이중 편파 방사가 가능한 레이더 시스템. And a controller for controlling activation of the first feeder and the second feeder.
  6. 제5항에 있어서,The method of claim 5,
    상기 컨트롤러는 상기 제1 급전부 및 상기 제2 급전부가 교대로 활성화되도록 제어하는 것을 특징으로 하는 이중 편파 방사가 가능한 레이더 시스템. And the controller controls the first feed part and the second feed part to be alternately activated.
  7. 제6항에 있어서,The method of claim 6,
    상기 제1 급전부가 활성화될 때 상기 스파이럴 방사체는 제1 원형 편파 신호를 방사하고, 상기 제2 급전부가 활성화될 때 상기 스파이럴 방사체는 상기 제1 원형 편파 신호와 반대인 제2 원형 편파 신호를 방사하는 것을 특징으로 하는 이중 편파 방사가 가능한 레이더 시스템. The spiral radiator emits a first circularly polarized signal when the first feeder is activated, and the spiral radiator radiates a second circularly polarized signal opposite to the first circularly polarized signal when the second feeder is activated. Radar system capable of dual polarization radiation.
  8. 제5항에 있어서,The method of claim 5,
    상기 제1 원형 편파 신호가 방사되어 반사에 의해 수신되는 신호 및 상기 제2 원형 편파 신호가 방사되어 반사에 의해 수신되는 신호를 취합하여 감지 정보를 생성하는 이중 편파 방사가 가능한 레이더 시스템. And radar system capable of generating the detection information by combining the first circularly polarized signal and the signal received by the reflection and the second circularly polarized signal and the signal received by the reflection.
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YANG CHAN WOO ET AL.: "Analysis of Polarization and Beam Tilt Characteristics of Single Arm Spiral Antenna by Varying Length and Feed", JOURNAL OF THE KOREAN ACADEMIC INDUSTRIAL SOCIETY, vol. 10, no. 11, November 2009 (2009-11-01), pages 3137 - 3143 *

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