以電晶體負阻抗轉換器實現非福斯特電路

Abstract

本論文旨在探討以電晶體負阻抗轉換器實現非福斯特電路於特高頻(UHF)之可行性。目前在此頻段少有實作案例，本文藉由分析電路中的非理想效應，探討可能的阻礙，並且利用這些分析，嘗試設計並實作可工作於特高頻的負電感與負電容。 關鍵字：非福斯特電路、負阻抗轉換器

The feasibility of realizing a non-Foster circuit at UHF (ultra high frequency) by transistor negative-impedance converters is discussed in this work. There are only a very few negative-impedance converters built for this frequency band, and the possible difficulties that may be encountered in the design processes are discussed by analyzing the non-ideal effects in the circuits. In addition, these analyses are used in the attempt to design and to build negative capacitors and negative inductors that can operate at UHF. Index Terms — Non-Foster Circuits, Negative Impedance Converters