Electromagnetic wave characteristics of second-order composite frequency-selective surfaces fabricated by e-beam evaporator

A composite frequency-selective surface (FSS) fabricated by using an e-beam evaporator is proposed. This manufacturing process is advantageous in that it can directly achieve an FSS function for real structural surfaces with various skin conformations. A multilayered patch-grid-patch-type FSS consisting of copper layers as capacitive or inductive surfaces and a glass/epoxy prepreg as the substrate is produced. It operates at 9-10 GHz for dual polarisation. This technique can be used to manufacture a stealth technology for communicating in a specific frequency range.