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Linearized frequency conversion properties of two‐port devices as a function of the pumping signal amplitude and phase
Author(s) -
Cidronali A.,
Loglio G.,
Manes G.
Publication year - 2006
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20184
Subject(s) - microwave , signal (programming language) , local oscillator , port (circuit theory) , radio frequency , phase (matter) , power (physics) , scattering parameters , matrix (chemical analysis) , amplitude , electronic engineering , materials science , electrical engineering , engineering , physics , computer science , optics , telecommunications , composite material , quantum mechanics , programming language
In this article a technique that allows derivation of the conversion matrix of a two‐port device using a measurement setup based on a nonlinear vector network analyzer (NVNA), which is capable of identifying the optimum local oscillator (LO) level and the corresponding RF and IF terminations for a microwave mixer, is discussed and validated. This technique is applied to extract the conversion matrix of gate‐pumped 0.2‐μm pseudomorphic high‐electron‐mobility transistors (PHEMTs) driven by a 4.8‐GHz signal at different power levels and using an intermediate frequency of 600 MHz. Several experimental results provide a behavioral description of the up‐ and down‐conversion mechanism in microwave mixers and highlight the dependency of the conversion‐matrix coefficients on the pumping signal amplitude and phase. Detailed validation of this technique is provided by means of a circuit‐level simulation and its consistency by vector network analyzer (VNA) measurements. © 2006 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2006.