Summary This article communicates a novel compact four‐element orthogonal cavity‐backed antenna for 5G applications with enhanced isolation. The proposed dumbbell‐shaped substrate integrated waveguide–multiple input/multiple output (SIW‐MIMO) resonate at 5.25 GHz (sub‐6 GHz) based on vias and 27 (mm‐wave) copper filling using FR‐4 substrate. Both prototypes are separately designed, fabricated, ...

Chiral coupling between quantum emitters and evanescent fields allows directional emission into nanophotonic devices is now considered to be a vital ingredient for the realization of networks. However, such requires well-defined circular dipole moment emitter---something difficult achieve solid-state at room temperature due thermal population available spin states. Here, we demonstrate that two...

Fuel-reduction/forest restoration treatments that consist of thinning followed by prescribed burning are becoming increasingly important land management actions that likely affect various wildlife species. To assess potential effects on bark-gleaning birds, we compared the foraging patterns of five cavity-nesting species in thinned and burned ponderosa pine (Pinus ponderosa) forest sites and co...

Noise reduction inside waveguide systems has gained momentum owing to a great interest in it. To attenuate the sound broad frequency range, this study aims compare effects of two acoustic liners, perforated plate backed by an air cavity (PP-Air cavity), or porous material (PP-PM), on behaviour lined ducts using numerical model compute multimodal scattering matrix. From matrix, reflection and tr...