A New Ultracompact Narrow Bandpass Microstrip Filter Using Double-Negative Quasiplanar Cells

<div>The DNG cell including a BC-SR electrically loaded to a microstrip line with series gaps: (a) a 3D layout and (b) the lumped element equivalent circuit.</div>

International Journal of Antennas and Propagation

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Figure 2

Figure 2: A New Ultracompact Narrow Bandpass Microstrip Filter Using Double-Negative Quasiplanar Cells 