WO2011162535A1 - Antenne radar pouvant émettre une polarisation double et système radar la comprenant - Google Patents

Antenne radar pouvant émettre une polarisation double et système radar la comprenant 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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WO
WIPO (PCT)
Prior art keywords
feeder
activated
spiral radiator
radar
radiator
Prior art date
Application number
PCT/KR2011/004528
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English (en)
Korean (ko)
Inventor
김진명
정창원
Original Assignee
주식회사 모비텍
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Publication date
Application filed by 주식회사 모비텍 filed Critical 주식회사 모비텍
Publication of WO2011162535A1 publication Critical patent/WO2011162535A1/fr

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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

L'invention concerne une antenne radar capable d'émettre une double polarisation, laquelle antenne comprenant : un radiateur spirale à un bras ; une première unité d'alimentation couplée électromagnétiquement au centre du radiateur spirale à un bras ; une seconde unité d'alimentation couplée électromagnétiquement à une extrémité du radiateur spirale à un bras ; la première unité d'alimentation et la seconde unité d'alimentation étant activées en alternance. Dans cette antenne, un radiateur d'antenne unique peut émettre un rayonnement à double polarisation et offrir comme avantage de détecter un objet avec précision en utilisant une structure plus petite et de faible coût.
PCT/KR2011/004528 2010-06-21 2011-06-21 Antenne radar pouvant émettre une polarisation double et système radar la comprenant WO2011162535A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0058804 2010-06-21
KR1020100058804A KR20110138739A (ko) 2010-06-21 2010-06-21 이중 편파 방사가 가능한 레이더 안테나 및 이를 포함하는 레이더 시스템

Publications (1)

Publication Number Publication Date
WO2011162535A1 true WO2011162535A1 (fr) 2011-12-29

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PCT/KR2011/004528 WO2011162535A1 (fr) 2010-06-21 2011-06-21 Antenne radar pouvant émettre une polarisation double et système radar la comprenant

Country Status (2)

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KR (1) KR20110138739A (fr)
WO (1) WO2011162535A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6130652A (en) * 1999-06-15 2000-10-10 Trw Inc. Wideband, dual RHCP, LHCP single aperture direction finding antenna system
US6380896B1 (en) * 2000-10-30 2002-04-30 Siemens Information And Communication Mobile, Llc Circular polarization antenna for wireless communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6130652A (en) * 1999-06-15 2000-10-10 Trw Inc. Wideband, dual RHCP, LHCP single aperture direction finding antenna system
US6380896B1 (en) * 2000-10-30 2002-04-30 Siemens Information And Communication Mobile, Llc Circular polarization antenna for wireless communication system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JUNG, CHANG WON ET AL.: "A Single-Arm Circular Spiral Antenna with Inner/ Outer Feed Circuitry for Changing Polarization and Beam Characteristics", IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 22 June 2003 (2003-06-22) - 27 June 2003 (2003-06-27), COLUMBUS, OHIO USA, pages 474 - 477, XP010650847, DOI: doi:10.1109/APS.2003.1220313 *
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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