Power and noise limitations of active circulators

被引：79

作者：

Carchon, G ^{[1
]}

Nauwelaers, B ^{[1
]}

机构：

[1] Katholieke Univ Leuven, ESAT TELEMIC Div, B-3001 Heverlee, Belgium

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2000年 / 48卷 / 02期

关键词：

active circulator; MMIC; noise;

D O I：

10.1109/22.821785

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, new simple formulas expressing the power and noise limitations for three three-way circulator architectures and three quasi-circulator architectures are derived. It is shown that the power-handling capability of the active three-way circulators is determined by the required transconductance of the transistors in the circuit, while the noise is determined by the drain noise current source. The suitability of the different active circulator architectures for transmit/receive applications is investigated. We conclude that the quasi-circulators based on passive isolation offer the highest performance.

引用

页码：316 / 319

页数：4

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