• Title/Summary/Keyword: aperture coupled patch antenna

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Efficient Computation of the Impedance Matrices for Layered Medium Problems Using the Spline-type Divided-difference Interpolation Technique (스플라인형 분할차분 보간법을 이용한 다층구조 문제의 임피던스 행렬의 효율적 계산)

  • 강승택;최재훈
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.10 no.2
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    • pp.257-266
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    • 1999
  • In this paper, a spline-type divided-difference interpolation technique is proposed to efficiently evaluate the impedance matrix elements in the MoM analysis of layered medium problems. This method is combined with the fast computational method of the basis-expanded and tested dyadic Green's functions (expressed in the spectral domain integrals) in a recent literature. For the sake of its validity, the proposed method is applied to analyze the characteristics of a microstrip gap discontinuity, a microstrip filter, and an aperture coupled patch antenna. Numerical results obtained by this approach are in good agreement with those of other approaches.

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Design of a Circular Polarization Microstrip $12\times12$ Series-Parallel Array Antenna at 10 GHz (원형 편파 마이크로스트립 $12\times12$ 직-병렬 배열 안테나 설계)

  • 이영주;정명숙;박위상
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.11 no.1
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    • pp.26-36
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    • 2000
  • A circularly polarized $12\times12$ array with application in the satellite communications is designed at 10 GHz. The radiator is an aperture-coupled ring patch, which is suitable of large arrays. The element spacing of the array is chosen to be $0.7\lambda_0$to maintain the main beam in the broadside direction. The array is a sequential array constructed on a series-parallel feed network to obtain high gain and low axial ratio. Measurement results for the array, acquired by experiments in the compact range of POSTECH, showed a directivity of 27.88 dB, a high gain of 25.55 dB, an efficiency of 60%, an axial ratio of 1.74 dB, and a side-lobe level of -13 dB. The bandwidth of the array was 43% when the VSWR was 2, and the bandwidth of the axial ratio was 16%.

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