Dual-Polarized Multiresonant Metantenna for Quasi-Independent Radiation and In-Band Scattering Manipulation

A dual-polarized multiresonant metantenna (MRMTA) is proposed for quasi-independent radiation and multiple in-band
$x$
-polarized scattering manipulations using characteristic mode analysis (CMA). The MRMTA unit cells in radiation and scattering modes have different resonance behaviors around meandering edges and inner slots, respectively. Moreover, tuning the inner slots of MRMTA unit cells can alter the reflection phase distributions for MRMTA’s different scattering functions but leave a weak influence on the radiation mode resonance, which enables dual-polarized radiation quasi-independent of multiple in-band
$x$
-polarized scattering manipulations. To verify the quasi-independence, the MRMTA’s top layout is designed based on 2-bit coding for two examples of
$x$
-polarized in-band low scattering and scattered-beam deflection. Fed by three stacked substrate integrated waveguides (SIWs), the MRMTAs with different layouts can reduce the radar cross Section (RCS) by 16 dB, steer scattered beams near the desired deflection direction, and maintain stable in-band dual-polarized radiation properties across experiments and simulations.