Compact FM Transmitter Design for Wireless Operation of MEMS Capacitive Vibration Sensors
Document Type
Oral Presentation
Department
Engineering
Abstract
This work involves redesign and redevelopment of a miniature FM modulated transmitter which served as a wide bandwidth MEMS capacitive vibration sensor interface to remotely detect vibration. The primary emphasis is to increase the signal-to noise-ratio and the range of transmission as received and demodulated by a software-defined-radio (SDR) while keeping the battery power of the transmitter minimized for a long battery life. Two approaches are being implemented: (1) Improvement on the transmitter’s oscillator and amplifier circuits to increase the power efficiency and generated RF power, (2) improvement on the antenna and coupling designs to improve the radiated RF power efficiency. All designs are implemented with surface mount components on a custom designed printed circuit board. This project was partially funded by an undergraduate research grant which facilitated purchasing of SDR and a nanoVNA for spectrum and network analysis measurements.
Compact FM Transmitter Design for Wireless Operation of MEMS Capacitive Vibration Sensors
This work involves redesign and redevelopment of a miniature FM modulated transmitter which served as a wide bandwidth MEMS capacitive vibration sensor interface to remotely detect vibration. The primary emphasis is to increase the signal-to noise-ratio and the range of transmission as received and demodulated by a software-defined-radio (SDR) while keeping the battery power of the transmitter minimized for a long battery life. Two approaches are being implemented: (1) Improvement on the transmitter’s oscillator and amplifier circuits to increase the power efficiency and generated RF power, (2) improvement on the antenna and coupling designs to improve the radiated RF power efficiency. All designs are implemented with surface mount components on a custom designed printed circuit board. This project was partially funded by an undergraduate research grant which facilitated purchasing of SDR and a nanoVNA for spectrum and network analysis measurements.
