SINGLE FREQUENCY BAND PASS/REJECTION FILTER USING FREQUENCY SELECTIVE SURFACE TECHNIQUE

摘要

A FSS(Frequency Selective Surface) spatial filter is provided to filter a required filtering target frequency band by adjusting geometrical length and shape, material and the layer number of unit cells. A loop(12) is geometrically entangled by using a space-filling curve principle. A support(13) supports the loop. A unit cell of a single period consists of the loop and the substrate. A wanted frequency is selectively transmitted/reflected according to a geometrical shape of the loop, array and period of the unit cell, and material feature of the loop and the substrate. The length, thickness and material of the loop are adjusted to tune a filtering center frequency.