The electronic and vibrational spectroscopic properties and ionization energies of diamondoids (nano-diamonds, microdiamonds) are computed using density functional theory (DFT). Spectra of both the neutral and cationic forms of diamondoids, ranging in size from C10H16 to C38H42, and the IR spectrum of a diamondoid-PAH hybrid molecule are presented. For the 23 neutral species, the C-H stretching...

In this paper, a flexible and semi-transparent antenna is proposed having impedance bandwidth of 110 MHz (from 2.45 GHz to 2.56 GHz) ISM band which covers the most popular (2.4 for Wi-Fi application all over world. A simple dipole shape rectangular ring with two extended edge on opposite sides was prepared by laser direct writing an Au sputtered PET film. The center part kept empty transparent ...

This paper proposes a compact 2*1 reader array antenna for RFID system having high directivity, good gain, and reflection coefficient. The structure consists of two main radiating rectangular patch antennas connected in parallel with common impedance (50 Ω). These patches are printed on an RT/duroid 5880 substrate possessing dielectric constant ε r equal to 2.2 0.0009 as loss tangent. It operat...

A wireless MEMS accelerometer for physiological activity monitoring, which is light weight and consumes low power, is proposed. The device is intended to acquire the movement and vibration signal from human body. It processes and transmits the signal wireless to a nearby base station using 900 MHz ISM band.

In this paper, a new image-reject low noise amplifier is designed for the 2.4 GHz industrial-scientific-medical (ISM) band. An inter-stage T-structure filter is used in the low noise amplifier design to provide 35-dB image rejection. The goal of this design is to merge the image-reject function into the low noise amplifier.