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We report on the intrinsic responsivity of an asymmetric dual-grating-gate plasmonic detector over 100 kV/W at 200 GHz and 50 kV/W at 300 GHz measured at room temperature with zero source-drain bias. We demonstrate that broadband characteristics of the responsivity depend much on the geometrical parameters of the detectors.
We report a new fabrication process to realize a slant field plate – a field plate in which the plate-to-channel distance gradually increases with the distance from the gate edge – using a multi-layer SiCN film. AlGaN/GaN HEMTs with several types of field plates are fabricated by this technique. The current collapse in the pulsed measurements is suppressed by the slant field plates more effectively...
This paper presents a new multiple hypothesis problem for spectrum sharing between primary users (PUs) and secondary users (SUs) with cognitive radio technique. The considered four hypotheses are as follows; the studied frequency band is vacant (hypothesis H0), the studied frequency band is occupied only by a PU (hypothesis H1), the studied frequency band is occupied only by another SU (hypothesis...
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