PMC

(a) Shows the reflected voltage magnitude |V| spectra of the highly polished mirror (black) and assigned sample DPP3T (in red) for 0.32 mW millimeter wave power incident at 65.4° on mirror/sample surface. (b) Same as in (a) but for polymer FTAZ film, (c) Same as in (a) but for P3HT:PCBM 95:5 spun at 90 RPM, (d) Same as in (c) but P3HT:PCBM spun at 250 RPM, (e) Same as in (a) but for high crystalline sample Y5 from cold solution.

(a) Shows the transmitted voltage magnitude |V| spectra of the free space (in black) and assigned sample DPP3T (in red) for 0.32 mW millimeter wave power incident normally. Circle over data indicate anomalous data in through-sample transmission signal possibly due to standing wave/multiple reflections from 990 μm glass substrate. The DPP3T transmission data flagged pertain to 110.1, 111.2, 113.8, 113.9, 114.1, 116.9, 117.9, and 120.8 GHz. These data should be used with caution (b) Same as in (a) but for polymer FTAZ film [,], (c) Same as in (a) but for P3HT:PCBM (95%:5%) spun at 90 RPM with anomalous data flagged at frequencies: 111.2, 120.9 and 127.9 GHz, (d) Same as in (c) but P3HT:PCBM (95%:5%) spun at 250 RPM with anomalous transmission voltage data occurring at 110.1, 111.2, 113.9, 120.8, 127.7, 127.8 and 127.9 GHz respectively, these data should be used with caution, (e) Same as in (a) but for high crystalline sample Y5 from cold solution [].

EBG setups with two port transmission lines for the surface wave suppression. The transmission lines were placed 0.3 mm above the square- and cross-shaped EBG structures. The surface waves were suppressed by the EBG structures and were blocked from the propagation through transmission lines.

Transmission and reflection coefficients (S₁₁, S₁₂) of the square- and cross-shaped EBG structures. Both the EBG structures provided a wider bandgap for the surface wave suppression.