KR20010018682A - Circular-Polarized Dipole Antenna - Google Patents

Circular-Polarized Dipole Antenna Download PDF

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Publication number
KR20010018682A
KR20010018682A KR1019990034733A KR19990034733A KR20010018682A KR 20010018682 A KR20010018682 A KR 20010018682A KR 1019990034733 A KR1019990034733 A KR 1019990034733A KR 19990034733 A KR19990034733 A KR 19990034733A KR 20010018682 A KR20010018682 A KR 20010018682A
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South Korea
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circularly polarized
antenna
polarized wave
dipole antenna
antennas
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KR1019990034733A
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Korean (ko)
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KR100343893B1 (en
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우종명
한성민
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우종명
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/108—Combination of a dipole with a plane reflecting surface
    • 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
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE: A circularly polarized wave dipole antenna is provided to maintain stable receiving level regardless of polarization direction between the base station and the terminal equipment and prevent interference between neighbor antennas by attaching a reflector plate to the antenna. CONSTITUTION: Horizontally polarized wave dipole antennas(1,2) are installed perpendicularly to vertically polarized wave dipole antennas(3,4) mounted onto a support. The radiation element(4) of 1/4 wavelength is changed in its location. Based on the feeding point, each radiation element is arranged to have length asymmetrical with each other in vertical direction. The impedance difference caused by the adjustment of the position of radiation element is adjusted to be 90 degrees. Thus, the condition for generating circularly polarized wave is satisfied by the arrangement of radiation elements.

Description

원편파 다이폴 안테나{Circular-Polarized Dipole Antenna}Circularly polarized dipole antenna

본 발명의 목적은 PCS 기지국용 안테나를 수직편파 안테나에서 반사판 부착 원편파 다이폴 안테나로 대치함으로써, 기지국과 단말기간의 편파방향에 구애없이 안정된 수신 레벨을 유지할 수 있고 반사판 부착으로 후엽방사를 억제시킴으로써 인접 안테나간 상호간섭을 억제하기 위함을 목적으로 한다.An object of the present invention is to replace the PCS base station antenna from the vertically polarized antenna with a circularly polarized dipole antenna with a reflector, thereby maintaining a stable reception level irrespective of the polarization direction between the base station and the terminal, and adjacent antennas by suppressing posterior leaf radiation with a reflector. The purpose is to suppress mutual interference.

본 발명이 속하는 기술분야는 무선통신의 안테나 기술분야 중 원편파 안테나에 관한 것이다.The technical field to which the present invention pertains relates to a circularly polarized antenna in the antenna technical field of wireless communication.

종래의 다이폴 안테나의 경우 다이폴 안테나 2개를 서로 수직 배열함으로써 듀얼편파 특성을 얻거나 수직배열 상태에서 90°이상기를 부착한 원편파 출력특성을 얻고 있는 실정이며 90°이상기 없이 두 개의 다이폴 안테나의 수직배열만으로 원편파를 얻는 경우는 전무한 상태이다.In the conventional dipole antennas, two dipole antennas are arranged vertically with each other to obtain dual polarization characteristics or circular polarization output characteristics with a 90 ° or more attached in a vertical arrangement state. There is no state in which circular polarization is obtained only by the arrangement.

단일급전 안테나에서 수평다이폴과 수직다이폴을 상호직각 배치하고 그중 1/4파장한소자를 위치 변경함으로써 2개의 다이폴 안테나를 한조로 원편파 출력을 얻을 수 있는 원편파 다이폴 안테나를 고안, 설계·제작하였다. 이때 각 소자의 길이, 1/4파장 1소자의 위치설정(도1, 2의 (4)) 및 동축급전 케이블과 스터브 지지체간 거리 간격에 따른 원편파 축비 변화에 대한 정확한 특성 산출은 좀더 연구해야 할 과제이다.By arranging the horizontal dipoles and the vertical dipoles at right angles to each other, and changing the positions of one-quarter wavelength elements, a circularly polarized dipole antenna capable of obtaining circularly polarized outputs with two dipole antennas was devised and designed. . At this time, the exact characteristics calculation of the circular polarization axial ratio change according to the length of each element, the positioning of one 1/4 wavelength element (Fig. 1, 2 (4)) and the distance between the coaxial feed cable and the stub support should be studied further. It is a task to do.

도 1은 원편파 다이폴 안테나의 구조1 is a structure of a circularly polarized dipole antenna

도 2는 반사판 부착 원편파 다이폴 안테나의 구조2 is a structure of a circularly polarized dipole antenna with a reflector

[도 1,2]에서 (1)(2) : 1/2파장 수평다이폴 (3)(4) : 1/2파장 수직다이폴(1) (2): 1/2 wavelength horizontal dipole (3) (4): 1/2 wavelength vertical dipole in FIGS.

(5) : 급전동축케이블 (6) : 1/4파장 지지체(5): feed coaxial cable (6): 1/4 wavelength support

(7) : 1/4파장 스터브 (8) : 반사판(7): 1/4 wavelength stub (8): reflector

도 3은 반사판 부착 원편파 다이폴 안테나의 반사손실 및 임피던스 특성3 is a reflection loss and impedance characteristics of a circularly polarized dipole antenna with a reflector

도 4는 반사판 부착 원편파 다이폴 안테나의 원편파 방사패턴 및 축비 특성4 shows circular polarization radiation patterns and axial ratio characteristics of a circularly polarized dipole antenna with a reflector.

많은 통신시스템은 시스템 기능을 최적화하기 위해 고도의 편파 조절을 필요로 한다. 전파에서의 편파는 직선편파, 타원편파, 원편파 등이 있으며 시스템에 따라 적절한 편파를 선택 사용하고 있다. 만일 기지국 안테나의 전파편파를 수직편파에서 원편파로 채용할 경우 수신단말기에 있어서의 편파 다이버시티 문제를 상당히 개선할 수 있을 것으로 기대된다. 따라서 기지국 안테나를 원편파 안테나로 대치함으로써 기지국과 단말기간의 편파방향에 구애받지 않고 양호한 수신 레벨을 유지할 수 있는 장점이 있다.Many communication systems require a high degree of polarization control to optimize system functionality. There are linear polarization, elliptical polarization, and circular polarization in the radio wave, and appropriate polarization is selected according to the system. If the radio wave polarization of the base station antenna is adopted from the vertical polarization to the circular polarization, it is expected that the polarization diversity problem in the receiving terminal can be significantly improved. Therefore, by replacing the base station antenna with a circularly polarized antenna, there is an advantage that a good reception level can be maintained regardless of the polarization direction between the base station and the terminal.

원편파는 편파방향을 결정하는 두 직선편파가 상호직각이며 90°상대적 위상차를 갖아야만 생성될 수 있다.Circular polarization can be generated only when two linear polarizations that determine the polarization direction are perpendicular to each other and have a 90 ° relative phase difference.

본 안테나는 도1, 2에 나타난 바와 같이 지지체상의 수직 다이폴 안테나(도1, 2의 (3),(4))에 소자에 수평편파 다이폴 안테나(도1, 2의 (1),(2))를 직각으로, 그중 1/4파장 방사소자(도1, 2의 (4))를 위치변경 배치했다. 또한, 급전점을 기준으로 각 방사소자길이를 상하 비대칭적 위치 구성 및 방사소자의 길이조정으로 인한 임피던스차, 즉 위상차 ∠φ( φ: 위상차 각도, 이하동일)를 90° 되도록 조정하였다. 따라서 방사소자의 직각구조, 길이·위치 변경으로 인해 원편파 발생 조건을 만족시키도록 설계된 원편파 다이폴 안테나이다.As shown in Figs. 1 and 2, the antenna is a horizontally polarized dipole antenna (1 and 2 in Figs. 1 and 2) on a vertical dipole antenna (Figs. 1 and 2, 3 and 4) on a support. ), And the quarter-wave radiation element (Fig. 1, 2 (4)) was changed in position at right angles. In addition, the length of each radiating element was adjusted based on the feed point to adjust the impedance difference, ie, the phase difference ∠φ (φ: phase difference angle, hereinafter equal) due to the asymmetrical positional configuration of the radiating element and the length adjustment of the radiating element. Therefore, it is a circularly polarized dipole antenna designed to satisfy the circular polarization generation condition due to the change in the rectangular structure, length and position of the radiating element.

발명된 원편파 다이폴 안테나 중 "반사판 부착 원편파 다이폴 안테나"의 반사손실 및 임피던스 특성을 도 3에 나타내었다. 설계 주파수는 PCS 기지국용(1.810GHz)을 사용하였다. 그 결과 15.5dB의 반사손실과 36.06 + i3.63 Ω의 임피던스 특성을 나타내었으며, 빔폭 78°, -10dB 대역폭 19.3%(350MHz)로 두 주파수 공진에 의해 비교적 광대역을 나타내고 있다.The return loss and impedance characteristics of the "circularly polarized dipole antenna with a reflector" among the invented circularly polarized dipole antennas are shown in FIG. 3. The design frequency was used for the PCS base station (1.810 GHz). As a result, it showed return loss of 15.5dB and impedance of 36.06 + i3.63 Ω and relatively wide bandwidth by two frequency resonances with beam width of 78 ° and -10dB bandwidth of 19.3% (350MHz).

방사패턴 및 축비 측정결과를 도 4에 나타내었다. 방사패턴은 안테나 자체를 Azimuth 방향으로 10°씩 회전시키면서 18회 측정하였다. 측정결과 2dB이하의 축비를 유지하는 빔폭은 약 46°이며 후엽 패턴은 안테나 회전각도에 따라 차이가 있으나 최대 -23dB까지 나타냈다. 축비는 1dB 이하로 양호한 원편파 출력이 얻어졌다.The radiation pattern and the axial ratio measurement results are shown in FIG. 4. The radiation pattern was measured 18 times while rotating the antenna itself by 10 ° in the direction of Azimuth. As a result, the beam width maintaining the axial ratio of less than 2dB is about 46 ° and the posterior lobe pattern is up to -23dB although it depends on the antenna rotation angle. A good circular polarization output was obtained with an axial ratio of 1 dB or less.

위의 실측결과로부터, 새로운 형태의 반사판 부착 원편파 다이폴 안테나를 발명함으로써, 기존의 단일소자 다이폴 안테나만으로는 불가능했던 원편파의 발생을 가능케 했다.From the above measurement results, by inventing a new type of circularly polarized dipole antenna with a reflector, it was possible to generate circular polarization which was not possible with the conventional single-element dipole antenna alone.

또한 이 안테나를 적응배열안테나로 사용할 경우, 그 빔폭이 매우넓어 적절한 빔스 캔이 가능할 것으로 사료된다.In addition, when the antenna is used as an adaptive array antenna, it is considered that the beam width is very wide so that proper beam scanning is possible.

Claims (3)

두 개의 다이폴 안테나를 상호직각 배열 및 동일급전하고 그중 1/4파장 방사소자 부착, 위치변경으로 인한 원편파 발생 안테나Two dipole antennas are arranged at right angles to each other. 청구항 1에 있어서 1/4파장 4개의 방사소자 중 하나를 동축 급전선 외피에, 나머지 3개 소자를 지지체 상에 위치시키고, 방사소자의 길이, 1/4파장 방사소자 1소자의 지지체 외피상이나 동축급전선 외피상에 장착, 위치변경으로 인한 원편파 출력특성을 얻을 수 있는 원편파 다이폴 안테나(도 1).The method according to claim 1, wherein one of the four quarter wavelength radiating elements is placed on the outer surface of the coaxial feeder line, and the other three elements are placed on the support, and the length of the radiating element is on the support outer shell or coaxial feeding line of one quarter wavelength radiating element. Circularly polarized dipole antenna which can be mounted on the shell and obtain circularly polarized wave output characteristics due to the change of position (FIG. 1). 청구항 2에 있어서 3개의 1/4파장 방사 소자(도 2의 (1),(2),(3))로부터 1/4파장 떨어진 거리, 나머지 1/4파장 한 방사소자(도 2의 (4))로부터 1/8파장 떨어진 지점에 반사판을 부착한 반사판 부착 원편파 다이폴 안테나(도 2).The distance of one quarter wavelength from three quarter wavelength radiating elements ((1), (2), and (3) of FIG. 2), and the other quarter wavelength radiating element (4 of FIG. A circularly polarized dipole antenna with a reflector attached with a reflector at a point 1/8 wavelength away from the waveguide (Fig. 2).
KR1019990034733A 1999-08-20 1999-08-20 Circular-Polarized Dipole Antenna KR100343893B1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100611325B1 (en) * 2001-04-09 2006-08-10 삼성전자주식회사 Internet micro wave oven
KR100797395B1 (en) * 2006-12-04 2008-01-28 한국전자통신연구원 3 port orthogonal mode transducer and its using receiver and method
KR100854471B1 (en) * 2007-08-28 2008-09-09 주식회사 엠티아이 Complex elememts for antenna of radio frequency repeater and dipole array circular polarization antenna using the same
KR100911480B1 (en) * 2008-03-31 2009-08-11 주식회사 엠티아이 Radio frequency repeating system for wireless communication using cross dipole array circular polarization antenna
US7791431B2 (en) 2006-12-04 2010-09-07 Electronics And Telecommunications Research Institute 3-port orthogonal mode transducer and receiver and receiving method using the same
KR20170000695A (en) * 2015-06-24 2017-01-03 엘에스엠트론 주식회사 Directional antenna

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US3740754A (en) * 1972-05-24 1973-06-19 Gte Sylvania Inc Broadband cup-dipole and cup-turnstile antennas
US4062019A (en) * 1976-04-02 1977-12-06 Rca Corporation Low cost linear/circularly polarized antenna
JPS58182305A (en) * 1982-04-19 1983-10-25 Toshiba Corp Antenna for circularly polarized wave
JP2503885B2 (en) * 1993-05-31 1996-06-05 日本電気株式会社 Cross dipole antenna
CA2128738C (en) * 1993-09-10 1998-12-15 George D. Yarsunas Circularly polarized microcell antenna
JP3061990B2 (en) * 1993-09-24 2000-07-10 日本電気株式会社 Cross dipole antenna
JPH10126510A (en) * 1996-10-17 1998-05-15 Fujitsu Ltd Setting device for common signal line

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100611325B1 (en) * 2001-04-09 2006-08-10 삼성전자주식회사 Internet micro wave oven
KR100797395B1 (en) * 2006-12-04 2008-01-28 한국전자통신연구원 3 port orthogonal mode transducer and its using receiver and method
US7791431B2 (en) 2006-12-04 2010-09-07 Electronics And Telecommunications Research Institute 3-port orthogonal mode transducer and receiver and receiving method using the same
KR100854471B1 (en) * 2007-08-28 2008-09-09 주식회사 엠티아이 Complex elememts for antenna of radio frequency repeater and dipole array circular polarization antenna using the same
KR100911480B1 (en) * 2008-03-31 2009-08-11 주식회사 엠티아이 Radio frequency repeating system for wireless communication using cross dipole array circular polarization antenna
KR20170000695A (en) * 2015-06-24 2017-01-03 엘에스엠트론 주식회사 Directional antenna

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