Generation of third and higher-order intermodulation products in MEMS capacitors, and their effects

Girbau, David ; Otegi, Nerea ; Pradell, Lluís ; Lázaro, Antonio (2005) Generation of third and higher-order intermodulation products in MEMS capacitors, and their effects. In: Gallium Arsenide applications symposium. GAAS 2005, 3-7 ottobre 2005, Parigi.
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Abstract

In this work, the Intermodulation Distortion (IMD) produced by RF MEMS capacitors is studied. It is demonstrated that due to their non-linear behaviour, parallel-plate MEMS capacitors generate 5th order tones along with 3rd order IMD products. It is shown that MEMS linear models, restricted to small displacements of the MEMS membrane, neglect 5th order distortion while underestimate 3rd order tones, when high voltages are considered. A numerical non-linear model for simulating intermodulation is presented and validated by means of measurements for the general 2-tone case. Generation of 3rdand 5th IMD products is also demonstrated in MEMS driven by digitally-modulated communication signals. A measurement system is proposed in order to characterize IMD generation in RF MEMS capacitors excited by two RF tones as well as by digitally-modulated signals (QPSK).

Abstract
Tipologia del documento
Documento relativo ad un convegno o altro evento (Atto)
Autori
AutoreAffiliazioneORCID
Girbau, David
Otegi, Nerea
Pradell, Lluís
Lázaro, Antonio
Settori scientifico-disciplinari
DOI
Data di deposito
15 Feb 2006
Ultima modifica
17 Feb 2016 14:21
URI

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