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학술지 High Gain Metal-Only Reflectarray Antenna Composed of Multiple Rectangular Grooves
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저자
조용희, 변우진, 송명선
발행일
201112
출처
IEEE Transactions on Antennas and Propagation, v.59 no.12, pp.4559-4568
ISSN
0018-926X
출판사
IEEE
DOI
https://dx.doi.org/10.1109/TAP.2011.2165479
협약과제
11PR2500, 스펙트럼 공학 및 밀리미터파대 전파자원 이용기술개발, 최재익
초록
Using an overlapping T-block method based on mode-matching technique and virtual current cancellation, the scattering formulations for a metal-only reflectarray antenna composed of multiple rectangular grooves are rigorously presented in fast convergent integrals. By matching the normal boundary conditions at boundaries, we get the simultaneous equations of the TE and TM modal coefficients for plane-wave incidence and Hertzian dipole excitation. A metallic-rectangular-grooves based reflectarray fed by a pyramidal horn antenna was fabricated and measured with near-field scanning, thus resulting in 42.3 [dB] antenna gain at f = 75 [GHz]. Our circular reflectarray has 30 [cm] diameter and 5 961 rectangular grooves on its metal surface. The simultaneous equations for a Hertzian dipole feed are solved to approximately obtain the radiation characteristics of a fabricated reflectarray. The measured results are compared with those of the overlapping T-block method and the FDTD simulation and they show favorable agreements in terms of radiation patterns and antenna gain. © 2011 IEEE.
키워드
Electromagnetic diffraction, Green's function methods, metal-only reflectarray, millimeter wave technology, mode matching methods
KSP 제안 키워드
Antenna gain, At f, Boundary conditions, Current Cancellation, Dipole excitation, Electromagnetic diffraction, FDTD simulation, Green's function methods, Hertzian dipole, Millimeter wave technology, Mode matching(MM)