This paper presents a new approach for the global electromagnetic analysis of the three-Terminal active linear and nonlinear microwave circuits using the Finite-Difference Time Domain (FDTD) Method. Here, we have updated the both electric field components on the three - terminal active device by correlating the voltage and current with its impedance. This approach is applied to the analysis of a linear amplifier which includes a three-terminal active MESFET device. Simulations results are in good agreement with those of the commercial tool.
We fabricated an integrated reciprocating optical modulator consisting of a phase-shifted fiber Bragg grating and an optical high-speed phase modulator. High-order double sideband components were effectively generated by reciprocating modulation process. We also demonstrated photonic millimeter-wave generation by feeding the double-sideband components to a high-speed photodetector.
Using Markov processes, the representation of fractal signals based on the dyadic wavelet transform (DYWT) is established. Then a new method of the estimation for fractal signals embedded a white noise is proposed. The numerical comparisons with previous method are shown.
A novel vertical polarization single-feed dual-frequency microstrip antenna with an arc-shaped slot is proposed and its radiation properties are demonstrated. By selecting arc-angle and radius of the slot suitably, return loss characteristics less than -15dB is obtained. The frequency ratio of the two frequencies is within a range of about 1.4 to 1.7.