Filter and filtering method including a microstrip antenna and a frequency selective surface and a delay circuit delaying method

摘要

The filter comprising at least one frequency selective surface having the metallic pattern and at least two micro-strip antenna in a dielectric material and in the metal enclosure, a metal enclosure, the enclosure. The frequency selective surface is used to filter the electromagnetic signal propagating within the enclosure. The resonance frequency of the magnitude and the frequency selective surface of the antenna and the frequency selective surface is, it is determined whether or not the filter is a band-pass, band elimination, a notch filter, or a combination. If the frequency selective surface is omitted, the combination acting as a delay circuit to delay an electromagnetic signal, where the time delay is a function of the dielectric constant of the dielectric material.