Infinite Phased Arrays of Microstrip Antennas on Generalized Anisotropic Substrates

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Abstract
An analysis of infinite arrays of printed antennas on generalized anisotropic substrates is presented. Antenna elements studied include microstrip dipoles and probe-fed patches. In the analysis, the substrate anisotropy is general in form, with nine components in both the permittivity and permeability tensors. This allows the study of uniaxial substrates with tilted optical axis or the biased ferrite substrate. The analysis adopts a rigorous full-wave moment method. Numerical results show that by neglecting substrate anisotropy, the performance of printed antennas may be greatly affected. Results show that it is possible to improve the input impedance match by employing biased ferrite substrates. It is also found that the antenna characteristics may be changed dynamically by varying the bias magnetic fields.

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