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Computer‐aided optimization of broadband nonlinear microwave integrated circuits with the aid of electromagnetically generated look‐up tables
Author(s) -
Rizzoli Vittorio,
Costanzo Alessandra,
Cecchetti Claudio,
Masotti Diego
Publication year - 1997
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(199707)15:4<189::aid-mop1>3.0.co;2-b
Subject(s) - harmonic balance , microwave , electronic engineering , electronic circuit , inductance , inductor , nonlinear system , harmonic , interpolation (computer graphics) , microwave engineering , computer science , network analysis , engineering , topology (electrical circuits) , electrical engineering , telecommunications , physics , voltage , acoustics , quantum mechanics , frame (networking)
The direct numerical optimization of nonlinear microwave circuits by harmonic‐balance analysis coupled to electromagnetic simulation is a formidable computational task, even if advanced algorithmic concepts such as the space‐mapping technique are exploited. In order to obtain a reasonable compromise between accuracy and design time, the most CPU‐time‐intensive components may be extracted from the circuit and separately analyzed by electromagnetic techniques. The results are then organized in the form of look‐up tables that are coupled to the optimization process by means of suitable interpolation algorithms. The article discusses the generation of such a family of look‐up tables for square spiral inductors, and their use in nonlinear circuit optimization. It is shown that the range of inductance values typically of interest for RF / microwave design can be covered by two‐dimensional tables depending on frequency and on one geometrical parameter only. The resulting optimization process is fast and well behaved, and can normally achieve the same circuit performance produced by a design approach based on ideal lumped inductors. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 15: 189–196, 1997.