Conformal Phased array antenna with low SLL based on QCTO

Abstract

Quasi-conformal transformation optics (QCTO) provides a practical approach to design nonmagnetic broadband medium for electromagnetic devices, here we present a novel hybrid method of QCTO with low sidelobe array synthesis, and apply it to the conformal phased array antenna (PAA) design. Effective approximation of relative permittivity is used to avoid metamaterials with dielectric constant lower than unity during the coordinate transformation. Taking the conformal cylindrical array as example, numerical simulations are given to show how arbitrary non-uniform PAA based on all dielectric QCTO lens can scan as a uniformly spaced linear PAA with low sidelobe level (SLL), which makes the advantages of linear array such as simple array synthesis and beamforming, can be achievable by an arbitrary array with complex geometry.