Naoyuki Kurita

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60GHz and 80GHz-band power amplifier (PA) MMICs have been developed on a standard 90nm CMOS technology for use in RF front-ends of wide-band, low-cost communication and/or radar systems. A 60GHz three-stage PA and a 80GHz five-stage PA, both with single-ended architecture, have demonstrated saturated output powers of 12.6dBm and 10.3dBm with linear gains of(More)
A 77-GHz MMIC chip set consisting of a low noise amplifier, a power amplifier, a down converter and a voltage controlled oscillator has been developed to constitute a T/R module for automotive radar systems. The low noise amplifier exhibited a gain of 9.5 dB/spl plusmn/1.0 dB over a 62-96.5 GHz band with an NF of 5.8 dB. The power amplifier achieved a(More)
Single-balanced MMIC mixers covering RF and LO bands of 50-100 GHz have been developed. A Marchand balun and a side-coupled balun in microstrip configurations were compared for LO drive ports of the mixers. The Marchand balun type demonstrated a conversion loss of 11.6 dB/spl plusmn/2.8 dB over a 50-103.5 GHz band, whereas the side-coupled balun type(More)
Whole-body force sensation with a simple configuration is desirable for robots in human environment. This paper deals with a force sensor-based whole-body force sensing technique of robots and expand it to arbitrary shape end-effectors. Previous techniques could not deal with a non-convex-shaped end-effector since multiple candidates of contact points exist(More)
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