Apparatus and methods for monitoring usage patterns of a wireless device may include a usage monitoring and reporting module operable to monitor and log usage on a wireless device based on a received usage configuration. An annulus cavity is etched into the silicon carrier from the top side of the carrier and the cavity is filled with insulating material to form an isolation collar around a silicon core region. The ultrasound receiving transducer and one last distance sensor are supported with a transducer surface in a second plane parallel with the first plane. A phase angle of a main rotor as an output with respect to an operation input from a swash plate becomes an acute angle, and the main rotor and a stabilizer are mounted to rotate with a phase difference of the acute angle.