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Constant Mismatch Loss Boundary Circles and Their Application to Optimum State Distribution in Adaptive Matching Networks
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- Sjöblom, Peter (author)
- Lund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH
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- Sjöland, Henrik (author)
- Lund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH
- (creator_code:org_t)
- 2014
- 2014
- English.
- In: IEEE Transactions on Circuits and Systems II: Express Briefs. - 1549-7747. ; 61:12, s. 922-926
- Journal article (peer-reviewed)
Abstract
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- An adaptive matching network provides a number of states between which it can be reconfigured. At a certain frequency, the matching network transforms a reference impedance to different impedances for the different states. The circuit will be able to match those impedances perfectly to the reference impedance, and impedances close to those will also be fairly well matched. The matching will, however, decline for impedances further away and eventually become too low. By defining the level of acceptable matching, a boundary can be formed that identifies an area of impedances that are matched well enough. In the same manner, a boundary is possible to form for constant mismatch loss. It is shown that the boundaries are circular if plotted in a Smith chart and that the sizes of the circles depend on the location of $z_{L}$. With these results, it is then investigated how the impedances should be distributed to minimize the number of states while still achieving the matching performance and coverage.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
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