Introduction
Based Circuit DesignThe design of RF MEMS?based circuits for wireless applications is predicated upon the well-established principles of RF and microwave electronics and on the novelty of RF MEMS devices. The well-established principles of RF and microwave electronics may be readily found in a variety of books [1?11], which are, no doubt, familiar to both the RF/microwave student and the practicing engineer.
Given this background, the previous chapters have aimed at the following:
(1) motivating the need and opportunities for RF MEMS;
(2) reiterating those elements/principles of RF/microwave circuit design that are key to the successful design of RF MEMS?based circuits;
(3) developing familiarity with the arsenal of novel RF MEMS circuit elements and models; and (4) introducing some of the novel RF MEMS circuits this arsenal has enabled. The aim of this chapter, then, is to present a detailed study of RF MEMS?based circuit implementations that integrates the material presented thus far. In order to do this, we have chosen, perhaps, the three most important MEMS-based circuits thus far, given their system-level impact, the way in which they are impacted by, and the way they exploit, or are drivers of, RF MEMS technology?namely, phase shifters, filters, and oscillators.
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