In contrast FR-2 and FR-4 initially exhibit low dielectric losses at lower frequencies but show an increasing trend beyond 300 kHz.
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Fabrication of industrial grade F/g-C<sub>3</sub>N<sub>4</sub> reinforced banana natural Fiber sustainable PCB substrates.
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The sentences
While all materials show a decreasing trend in tan δ with increasing frequency FR-2 and FR-4 remain lossier compared to BPCB PCB and g-C3N4-based composites.