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Efficient analysis of input impedance and mutual coupling of microstrip antennas mounted on large coated cylinders

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2 Author(s)
Erturk, V.B. ; Dept. of Electr. & Electron. Eng., Bilkent Univ., Ankara, Turkey ; Rojas, R.G.

An efficient and accurate hybrid method, based on the combination of the method of moments (MoM) with a special Green's function in the space domain is presented to analyze antennas and array elements conformal to electrically large material coated circular cylinders. The efficiency and accuracy of the method depend strongly on the computation of the Green's function, which is the kernel of the integral equation that is solved via MoM for the unknown equivalent currents representing only the antenna elements. Three types of space-domain Green's function representations are used, each accurate and computationally efficient in a given region of space. Consequently, a computationally optimized analysis tool for conformal microstrip antennas is obtained. Input impedance of various microstrip antennas and mutual coupling between two identical antennas are calculated and compared with published results to assess the accuracy of this hybrid method.

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Antennas and Propagation, IEEE Transactions on  (Volume:51 ,  Issue: 4 )