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A novel, homogeneous multiphase conjugation technique is adopted in this letter to obtain single-feed multibeam multipolarized dual planar high-gain impedance-modulated metasurface antenna (IMMA). Comprehensive analytical discussion on non-homogeneous surface impedance (Zₒₔₑ₅) distribution to obtain multipolarized distinct beams from the proposed single-feed metasurface is presented in this article. The proposed IMMA operating at fₑ= 25\, GHz with an overall dimension of 18 { ₀} 18{ ₀}, yields highly directive symmetric multibeam patterns toward ({ ₙ}, { ₙ}) = (0^, 0^), (−28^, 0^), (28^, 0^), (−28^, 90^), (28^, 90^), oriented along two orthogonal azimuth planes (i. e. , = 0^ and 90^) with a peak gain (g_) = 21. 21\, dBi. In terms of the choice of polarization, individual beam patterns at = 0^ and 90^ exhibit circular i. e. , left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP) and linearly polarized i. e. , horizontal polarization (HP) and vertical polarization (VP) radiation patterns. However, the central beam ({{ ₙ}, { ₙ}} = 0^, 0^) remains circularly polarized and shares both = 0^ and 90^ azimuthal plane. Both full-wave electromagnetic (EM) simulation and measured results indicate −25 dB cross-polarization isolation with an average half-power beamwidth (HPBW) of 3. 64^ each.
Ghosh et al. (Thu,) studied this question.