The IR absorption spectra of several macromolecules of interest for amorphous carbonaceous cosmic dust were simulated by means of a commercially available stateof-the-art chemical code. None of the three unidentified far IR features show up significantly in the absence of oxygen in the structure. By contrast, peripheral OH (hydroxy) gives rise to strong modes in the “30” band. The “26” and “20”...

This article presents a 26–30 GHz gallium nitride (GaN) high electron mobility transistor (HEMT) low-noise amplifier (LNA) for fifth-generation base station applications. In the proposed design, series inductor-based stability enhancement technique was utilized to improve reverse isolation and performance of mitigate effect parasitic capacitance GaN HEMT device. To validate concept three-stage ...