Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Analysis of Coupling Between Digital Noise and Portable Smart Terminal Antenna According to Antenna Types

휴대용 스마트 단말기 안테나 타입에 따른 디지털 노이즈와 안테나의 결합 분석

  • Kim, Joonchul (Dept. of Information Systems Engineering, Sungshin University)
  • Received : 2019.09.05
  • Accepted : 2019.09.17
  • Published : 2019.09.30
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Abstract

In this paper, we analyze the degree of digital noise coupling for Inverted F Antenna (IFA) and Loop Antenna, which are representative types of portable terminal antenna, using characteristic mode. Firstly, the degree of coupling according to the direction of digital signal lines and characteristic mode current of the printed circuit board (PCB) including the antenna is compared and analyzed, and based on this result, the coupling between WiFi antenna and the front camera noise is analyzed. For analysis, the digital signal line and ground line of the FPCB of the camera module are modeled as a loop feeder that excites the characteristic mode of the PCB ground and the change of noise coupling according to the antenna types are analyzed.

본 논문에서는 휴대단말기 안테나의 대표적 형태인 역 F 안테나(Inverted F Antenna, IFA)와 루프(Loop) 안테나에 따른 디지털 노이즈의 결합(coupling) 정도를 특성모드(characteristic mode)를 사용하여 분석한다. 우선, 안테나를 포함한 인쇄회로기판(Printed Circuit Board, PCB)의 특성모드 전류와 디지털 신호라인의 방향에 따른 결합 정도를 비교 분석하고, 이를 토대로 휴대단말기의 WiFi 안테나와 전방 카메라(front camera)의 결합에 대해서 분석한다. 분석을 위해서 카메라 모듈의 FPCB의 디지털 신호선과 그라운드 선을 PCB 그라운드의 특성 모드를 여기(excitation) 시키는 루프형 피더(feeder)로 모델링 했고, 안테나 타입(type)에 따른 노이즈 결합 변화에 대해서 분석을 했다.

Keywords

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