Abstract
To develop nanoscale sensors with future potential, a nanoscale receiver utilizing the nanomechanical vibration of a cantilever composed of a carbon nanotube, had been proposed for detecting the digital information carried by wireless signals. The introduced receiver includes two essential parts: a phase detector and demodulator, which employ a reference signal and carrier signal, respectively. Additional components such as electrical circuits and oscillators are required to excite these signals, increasing the sensor size. This study presents a design method for simplifying the receiver structure to contribute to sensor miniaturization. This study theoretically derives a tractable form that can describe the performance of the introduced receiver. This form enables the determination of a simple receiver structure with performance enhancement from a mathematical perspective. Using the proposed method, either the reference wave or carrier signal can be excluded from the receiver, simplifying its structure. The results are demonstrated through a numerical simulation.
Highlights
Nanomechanical devices including physical, chemical, and biological sensors have the potential to realize nextgeneration sensing systems [1]–[9]
Conventional electromagnetic-based antennas cannot be applied in nanoscale networks, because the antenna size is of the order of the transmitted signal wavelength [23]; for example, the size of an antenna in the megahertz band is several centimeters
By analyzing the tractable form, we provide two types of simplified receivers that omit either the carrier signal or reference wave
Summary
Nanomechanical devices including physical, chemical, and biological sensors have the potential to realize nextgeneration sensing systems [1]–[9]. By focusing on CNT nanocantilevers or a nano-beam, a detailed model with strain- and stress-driven nonlocal mechanics has been developed [37]–[39] Such a nanocantilever is capable of detecting electromagnetic waves [27]–[29]. Ito et al.: Simple Design on Nanoscale Receivers Using CNT Cantilevers theoretically addressed [40]; it needs careful design of the nonlinear parameters and signal amplitude. To overcome this problem, we propose a design method that simplifies the receiver structure proposed in [29].
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