RF engineering basic concepts: S-parameters
F. Caspers (CERN)
TL;DR
This paper explains fundamental RF engineering concepts focusing on S-parameters, wave descriptions, and signal flow graphs, highlighting passive device properties and the significance of planar transmission lines in microwave integrated circuits.
Contribution
It provides a comprehensive overview of S-parameters, wave-based circuit description, and visualization techniques for RF networks, emphasizing passive device properties and microwave circuit components.
Findings
Defines S-matrix and related matrices for RF circuits
Introduces signal flow graph as a visualization tool
Details properties of passive RF devices and their S-parameters
Abstract
The concept of describing RF circuits in terms of waves is discussed and the S-matrix and related matrices are defined. The signal flow graph (SFG) is introduced as a graphical means to visualize how waves propagate in an RF network. The properties of the most relevant passive RF devices (hybrids, couplers, non-reciprocal elements, etc.) are delineated and the corresponding S-parameters are given. For microwave integrated circuits (MICs) planar transmission lines such as the microstrip line have become very important.
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Taxonomy
TopicsMicrowave Engineering and Waveguides · Antenna Design and Optimization · Radio Frequency Integrated Circuit Design