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Constant Mismatch Loss Boundary Circles and Their Application to Optimum State Distribution in Adaptive Matching Networks

Sjöblom, Peter LU and Sjöland, Henrik LU (2014) In IEEE Transactions on Circuits and Systems - II - Express Briefs 61(12). p.922-926
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Circuits and Systems - II - Express Briefs
volume
61
issue
12
pages
922 - 926
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000345852200003
  • scopus:84914669260
ISSN
1558-3791
DOI
10.1109/TCSII.2014.2357137
project
EIT_SOS VINNOVA Industrial Excellence Center - System Design on Silicon
language
English
LU publication?
yes
id
f203073d-e2b0-453b-9db8-b6692b55565c (old id 4820723)
date added to LUP
2014-12-02 13:07:02
date last changed
2017-10-08 03:21:16
@article{f203073d-e2b0-453b-9db8-b6692b55565c,
  abstract     = {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.},
  author       = {Sjöblom, Peter and Sjöland, Henrik},
  issn         = {1558-3791},
  language     = {eng},
  number       = {12},
  pages        = {922--926},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Circuits and Systems - II - Express Briefs},
  title        = {Constant Mismatch Loss Boundary Circles and Their Application to Optimum State Distribution in Adaptive Matching Networks},
  url          = {http://dx.doi.org/10.1109/TCSII.2014.2357137},
  volume       = {61},
  year         = {2014},
}