Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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3-Element Quasi-Yagi Antenna with a Modified Balun for DTV Reception

변형된 밸런을 갖는 DTV 수신용 3소자 준-야기 안테나

  • Lee, Jong-Ig (Division of Mechatronics Engineering, Dongseo University) ;
  • Yeo, Junho (School of Computer and Communication Engineering, Daegu University)
  • Received : 2016.11.08
  • Accepted : 2016.11.17
  • Published : 2017.04.30
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Abstract

In this paper, we studied a design method for a broadband quasi-Yagi antenna (QYA) for terrestrial digital television (DTV) reception. The proposed antenna is composed of a dipole driver, a rectangular patch type director close to the dipole, and a ground reflector printed on an FR4 substrate. A balun between a microstrip line and a coplanar strip (CPS) line is a rectangular patch inserted along the center of the CPS. The end of the balun is connected to the CPS line through a shorting pin. An antenna, as an design example for the proposed antenna, is designed for the operation in the frequency band of 470-806 MHz for terrestrial DTV, and the characteristics of the designed antenna are examined. The antenna has a good performance such as a frequency band of 430-842 MHz for a voltage standing wave ratio < 2, a gain > 3.7 dBi, and a front-to-back ratio > 7.4 dB.

본 논문에서는 지상파 디지털 TV방송 수신용 광대역 준-야기 안테나(quasi-Yagi antenna; QYA)의 설계방법에 대해 연구하였다. 제안된 안테나는 FR4 기판의 한 면에 인쇄된 다이폴 투사기(driver)와 이에 근접하는 직사각형 패치모양의 도파기(director), 접지면 반사기(reflector)로 구성된다. 마이크로스트립(microstrip; MS) 선로와 코플래너스트립(coplanar strip; CPS) 선로 간의 밸런(balun)은 CPS 선로 중앙을 따라 삽입된 직사각형 MS 패치이고 종단의 한쪽은 CPS 선로에 단락 핀으로 연결되어 있다. DTV용 주파수 대역(470-806 MHz) 동작에 적합하도록 안테나를 설계하고 여러 가지 특성을 관찰하였다. 설계된 안테나는 전압정재파비가 2 이하인 주파수 대역 430-842 MHz, DTV 대역 내 배열 축 방향으로의 이득 > 3.7 dBi, 전후방비 > 7.4 dB 인 양호한 특성을 보인다.

Keywords

References

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