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برق و الکترونیک::
فیلتر فضایی
Therefore, an FSS is capable of passing or blocking the EM waves of certain range of frequencies in the free space; consequently, identified as spatial filters.
Keywords: frequency selective surfaces; microwave frequency; spatial filters; electromagnetic waves; periodic structures
Therefore, an FSS can pass or block the EM waves with certain frequencies in free space; so they are best identified as spatial filters.
Traditional FSSs are narrow band and they do not provide adequate spatial filtering response.
At microwave and optical frequency ranges, spatial filtering is the most desirable operation in all signal processing systems.
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