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The Importance of EM Analysis for RF/ Microwave Design

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EXTRACT Flow with ACE Tool By turning on full coupling within the ACE options tab on the EXTRACT block's parameter dialog box, it can be seen in Figure 8 that quite a bit of bandwidth is lost. Going back to the ACE options tab, the coupling radius can be changed to isolate the critical couplings (Figure 9). This takes only seconds as the EXTRACT flow continually updates the options for the EM document. Figure 8: The EXTRACT flow with the ACE tool shows all couplings for the distributed amplifier and the associated effect on bandwidth Figure 9: The EXTRACT flow creates ACE analysis showing critical couplings, which alone give desired performance Since the critical couplings are defined parametrically, the optimizer can be started and used with the EXTRACT flow and all the couplings turned on, as shown in Figure 9. The EXTRACT flow creates ACE analysis within the optimizing loop, thereby allowing a new and appropriate set of parameters to be selected for each of the trombone sections defining the distributed amplifier's three stages. Once the optimization loop is finished running with the ACE tool, even greater accuracy can be obtained using the AWR AXIEM analysis. The Importance of EM Analysis for RF/Microwave Design 6 www.cadence.com/go/awr

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