Lens with spatial mixed-order bandpass filter

摘要

An apparatus includes a plurality of layers of conductive elements and a substrate layer. A first of the layers of conductive elements has a first portion that includes conductive elements having a first structure different from a second structure of conductive elements in a second portion of the first layer. The first layer can be in contact with one side of the substrate layer. Conductive elements in a second of the layers of conductive elements can be in contact with another side of the substrate layer. The lens may include a first type of unit cell including at least one conductive element having the first structure and conductive elements having the second structure positioned on different sides of the substrate layer. The first type of unit cell may provide a capacitively-loaded bandpass filter response, and a second type of unit cell may provide a bandpass filter response.

主权项

1. An apparatus comprising:
a lens comprising a plurality of layers of conductive elements and a substrate layer; a first of the layers of conductive elements comprising a first portion including conductive elements having a first structure different from a second structure of conductive elements in a second portion of the first layer; wherein the lens is a mixed-order frequency selective surface (FSS) including:
a central portion that includes conductive elements of different structures on opposite sides of the substrate layer; andan outer portion that includes conductive elements having a same type of structure on opposite sides of the substrate layer.