Modulated Scalar Reactance Surfaces for Endfire Radiation Pattern Synthesis

Complete 1-D aperture fields are synthesized to design planar modulated reactance surfaces for endfire radiation characteristics. The evanescent part of the aperture fields is introduced and optimized to render the aperture surface passive and lossless everywhere. Characterized by a position-dependent, scalar surface reactance distribution mounted on an infinite conducting ground plane, the aperture radiates space waves with a prescribed far-zone pattern when excited by a TM-polarized surface wave (SW). The design technique is presented together with a few pattern synthesis examples. Physical conductor groove array metasurfaces excited by coax-fed SW launchers are simulated to confirm the practical realizability of the synthesized reactances.