상세정보
학술지
A Broadband Fabry-Perot Cavity Antenna Designed using an Improved Resonance Prediction Method
- 발행일
- 201105
- 출처
- Microwave and Optical Technology Letters, v.53 no.5, pp.1065-1069
- ISSN
- 0895-2477
- 출판사
- John Wiley & Sons
- 협약과제
- 08ZR1200, 인공전자기 구조를 이용한 차세대 전파 센서 기술 개발, 최재익
- 초록
- We have proposed a wideband Fabry-P챕rot cavity (FPC) base station antenna for wireless broadband Internet (WiBro) service in Korea. To widen the radiation bandwidth of our antenna, unit cells printed on a superstrate have been gradually tapered according to a proposed linear tapering equation. Also, all openings in the lateral directions have been enclosed using four metallic sidewalls to enhance the overall performance of the antenna by reducing unnecessary wave leakage. Furthermore, the radiation aperture has been designed in a rectangular shape to create sharp and sectoral beam shapes in the elevational and azimuthal directions, respectively. For a more accurate determination of the FPC resonance, an improved prediction formula has been used. We have demonstrated the basic principle of bandwidth widening using higher mode behavior, which appears at a higher frequency region by means of tapered cells on the superstrate. In addition, to show the effectiveness of simple tapering of unit cells, we have compared the performance of two antennas covered with the tapered and uniform (nontapered) superstrate. Tapering the unit cells has expanded the fractional radiation bandwidth about four times wider than that of the antenna using uniform unit cells. The measured behaviors of our antenna are in good agreement with the simulated data, which confirms the validity of our design and analysis approach. The measured behaviors of our antenna are in good agreement with the simulated data, which confirms the validity of our design and analysis approach. © 2011 Wiley Periodicals, Inc.
- KSP 제안 키워드
- Broadband Internet, Fabry-Perot cavity antenna, Higher mode, Overall performance, Prediction formula, Simulated data, Wireless Broadband, bandwidth widening, base station(BS), base station antenna, basic principle