ADS_session3

ADS_session3 - Simple Network Synthesis and the Smith Plot...

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ECE 5250/4250 ADS Session 3–1 Simple Network Synthesis and the Smith Plot Introduction This third session will look at simple network synthesis using the Smith chart, via the Smith chart utility and the use of the Smith plot type in ADS plot windows. Simple Network Synthesis • The Smith chart utility in ADS can be used to synthesize matching networks • Matching networks is a subject unto itself • Motivation at this point comes from the desire to synthesize a network of elements that result in a particular at some center frequency Example : Ohms • We open up the Smith chart utility in ADS and set the operat- ing frequency to 3 GHz • The normalizing impedance can be left at 50 ohms • We are going to synthesize starting from a 37.5 ohm resis- tor as the load impedance in the Smith chart utility Z L f 0 Z L 37.5 j 75 + = Z L ADS Session 3
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Simple Network Synthesis and the Smith Plot ADS Session 3–2 ECE 5250/4250 • We now place a series or shunt element in front of the resis- tive part of the load so that we can create a combined imped- ance of – What should this be? – With the 37.5 resistive portion already in place, the most direct approach is to place down a series inductor • Select a series inductor from the parts palette and click the mouse in the Smith chart at a location in the top half of the Gamma plane Re of Z L f 0 Turn normalize off 37.5 j 75 +
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Simple Network Synthesis ECE 5250/4250
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This note was uploaded on 10/16/2010 for the course ECE 380 taught by Professor Baltazar during the Spring '10 term at Rice.

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ADS_session3 - Simple Network Synthesis and the Smith Plot...

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