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Determining the RF resistance and Q-factor of air-core inductors

✍ Scribed by Shay Gross; Thomas Weller

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
176 KB
Volume
29
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

Air‐core inductors are large‐body, low‐loss components that find frequent use in circuits such as RF power amplifier matching networks. The physical attributes of the inductors make loss characterization using standard commercial instruments (e.g., impedance analyzers or resonant coaxial lines) problematic. In this paper, a resistance and quality factor extraction technique based on low‐impedance microstrip test fixtures is demonstrated at frequencies near 800 MHz. It is shown that an inductor resistance on the order of 0.1–1 Ω can be accurately determined. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 29: 89–93, 2001.

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