Patent ID: 11870147
Assignee: SAAB AB
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A method (500) for optimizing the transmittance and/or reflectance of an electromagnetic signal of a gradient structure, said gradient structure comprising a plurality of interconnected cells, wherein each cell comprises a through cavity surrounded by walls, wherein the walls of each cell have a gradually varying thickness along a longitudinal direction of the cavity of each cell, said method comprising:
selecting at least one bandwidth range (501), within which the gradient structure should transmit and/or reflect the electromagnetic signal,
selecting at least one incident angle (502) of a transmitter and/or a receiver arranged within the gradient structure,
selecting a thickness of the gradient structure (503),
dividing each cell into a plurality of layers (504) extending across a longitudinal direction of the cell,
optimizing values of the permittivity (506) for each of the plurality of layers, in order to maximize the performance of the gradient structure,
selecting a cell diameter (507) for the cells, wherein the cell diameter is smaller than the smallest wavelength within the at least one bandwidth range,
selecting the wall thickness (508) for each layer of the cell such that the permittivity of each of the plurality of layers corresponds to the optimized permittivity values.