Modeling, design, and analysis of the illuminated MESFET and the illuminated HMIC oscillator by simulator

Abstract

A large signal model of an optically illuminated MESFET and a method for design and analysis of an optically controlled HMIC oscillator based on the proposed model are reported in this paper. Measured values of the S parameters and dc characteristics of the optically illuminated MESFET are described. A modeling of the optically illuminated MESFET is described in detail, and an optically illuminated MESFET model containing an optical intensity parameter is proposed. The Ids‐Vds characteristics and the S parameters computed with this optically illuminated MESFET model are found to agree well with the measured values. A simulation analysis is presented for the optical control of oscillation frequencies and the optical pulse modulation experiment. The computed output spectra of the optically pulse modulated oscillator agree well with the measured results. It is confirmed that the microwave is modulated by light. Further, the envelope distortion is studied, and we investigate how illumination of the high‐speed optical pulse affects the envelope of the MESFET oscillator output and what the applicable maximum bit rate is. © 2000 Scripta Technica, Electron Comm Jpn Pt 2, 83(5): 1–12, 2000