What is it about?

The impedance matrix, which determines the interaction of the elements of a lossy antenna array, consists of the real and imaginary parts. The real part can be represented by the sum of two components, a matrix of radiation resistances and a matrix of loss resistances. It was previously believed that both of these matrices are also real. We have shown that in general, the radiation resistance matrix and the loss resistance matrix are complex Hermitian matrices with opposite imaginary parts.

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Why is it important?

We show that in the matrices of radiation resistance and loss resistance of antenna arrays with inhomogeneous losses, imaginary parts must be present, which allowing correctly divide the power received by the antenna array from external sources into the radiated and lost depending on its beam direction.

Perspectives

I hope that this article will expand the understanding of the properties of mutual resistances in lossy antenna arrays and allow them to be used correctly in the design and optimization of antenna systems.

Prof. Peter L. Tokarsky
Institute of Radio Astronomy of the National Academy of Sciences of Ukraine

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This page is a summary of: Mutual Impedance Properties in a Lossy Array Antenna, International Journal of Antennas and Propagation, November 2019, Hindawi Publishing Corporation, DOI: 10.1155/2019/1687497.
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