The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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Design and Fabrication of Dual Linear Polarization Stack Antenna for 4.7GHz Frequency Band

4.7 GHz 대역에서 동작하는 이중 선형편파 적층 안테나의 설계 및 제작

  • Joong-Han Yoon ;
  • Chan-Se Yu (Electronic Convergence Materials &Device Research Center, Korea Electronics Technology Institute)
  • 윤중한 (신라대학교 전기전자공학과) ;
  • 유찬세 (한국전자기술연구원)
  • Received : 2023.02.16
  • Accepted : 2023.04.17
  • Published : 2023.04.30
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Abstract

In this paper, we propose DLP(Dual Linear Polarization) stack antenna for private network. The proposed antenna has general stack structure and design airgap between two substrate to obtain the maximum gain. Also, to improve cross polarization isolation, two feeding port is designed to separate for each substrate. The size of each patch antenna is 17.80 mm(W1)×16.70 mm(L1) for lower patch and 18.56 mm(W2)×18.73 mm(L2) for upper patch, which is designed on the FR-4 substrate which thickness (h) is 1.6 mm, and the dielectric constant is 4.3, and which is 40.0 mm(W)×40.0 mm(L) for total size of substrate. From the fabrication and measurement results, bandwidths of 100 MHz (4.74 to 4.84 GHz) for feeding port 1, and 150 MHz (4.67 to 4.82 GHz) for feeding port 2 are obtained on the basis of -10 dB return loss and transmission coefficient S21 is got under the -20 dB. Also, cross polarization isolation between each feeding port obtained

본 논문에서는 특화망에 적용 가능한 DLP(Dual Linear Polarization) 적층 안테나를 제안하였다. 제안된 안테나는 일반적인 적층구조를 갖고 최대이득을 얻을 수 있도록 공기 갭을 갖도록 설계하였다. 격리도를 개선하기 위해서 두 개의 급전포트를 각 층으로 분리하여 설계하였다. 각각 패치의 크기는 하위층, 17.80 mm×16.70 mm(W1×L1) 그리고 상위층 18.56 mm×18.73 mm(W2×L2)이며 적층 안테나의 전체 크기는 40.0 mm(W)×40.0 mm(L)이며, 모두 두께(h) 1.6 mm, 그리고 비유전율이 4.4인 FR-4 기판을 사용하였다. 제작 및 측정결과로부터, -10 dB 반사손실을 기준으로 입력포트 1에서 100.0 MHz (4.74~4.84 GHz), 입력포트 2에서 150.0 MHz (4.67~4.82 GHz)의 대역폭을 얻었으며 전달계수 S21은 -20 dB 이하의 값을 얻었다. 또한 각 급전포트에서의 편파분리도를 얻었다.

Keywords

Acknowledgement

본문은 산업통상자원부의 재원으로 한국산업기술관리평가원(KEIT)의 지원을 받아 수행된 연구결과 중 일부임. (소재부품기술개발사업-초고주파·저잡음·저손실 LTCC 필터, 액티브 안테나 및 이를 적용한 5G 특화망용 중계 모듈 개발, 과제번호 : 20022409).

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