Application of Representation Theory to Dual-Mode Microwave Bandpass Filters Export

@article{Amari:2009, abstract = {<para> This paper discusses the physics behind the operation of dual-mode bandpass filters from a field theoretical point of view. It is argued that the two degenerate modes of the empty dual-mode cavity, commonly taken as the vertical and horizontal polarizations, become nonphysical when coupling and tuning elements are inserted. Instead, the original degenerate modes are rotated, or modified in a complex way, to generate two new modes whose characteristics depend on the coupling and tuning elements. It is shown that the tuning elements, as placed in existing dual-mode filter designs, act as both tuning and coupling elements. A working dual-mode filter can be designed with only \&\#x201C;tuning\&\#x201D; elements present. A physical representation of dual-mode filters in terms of the eigenresonances of the dual-mode cavities, with the tuning and coupling elements present, is introduced. Two fourth-order dual-mode rectangular cavity filters with the same response in the passband and its vicinity are also presented to demonstrate the similar role played by \&\#x201C;tuning\&\#x201D; and coupling elements in dual-mode cavities. The first filter uses only \&\#x201C;tuning\&\#x201D; elements, while the second is based only on \&\#x201C;coupling\&\#x201D; elements. </para>}, author = {Amari, S.}, booktitle = {Microwave Theory and Techniques, IEEE Transactions on}, citeulike-article-id = {4021291}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/TMTT.2008.2011194}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4752854}, doi = {10.1109/TMTT.2008.2011194}, journal = {Microwave Theory and Techniques, IEEE Transactions on}, keywords = {dual-mode-waveguide-filter, filter-synthesis}, number = {2}, pages = {430--441}, posted-at = {2009-02-07 06:05:29}, priority = {2}, title = {Application of Representation Theory to Dual-Mode Microwave Bandpass Filters}, url = {http://dx.doi.org/10.1109/TMTT.2008.2011194}, volume = {57}, year = {2009} }

TY - JOUR ID - Amari:2009 L3 - citeulike-article-id:4021291 N2 - <para> This paper discusses the physics behind the operation of dual-mode bandpass filters from a field theoretical point of view. It is argued that the two degenerate modes of the empty dual-mode cavity, commonly taken as the vertical and horizontal polarizations, become nonphysical when coupling and tuning elements are inserted. Instead, the original degenerate modes are rotated, or modified in a complex way, to generate two new modes whose characteristics depend on the coupling and tuning elements. It is shown that the tuning elements, as placed in existing dual-mode filter designs, act as both tuning and coupling elements. A working dual-mode filter can be designed with only &#x201C;tuning&#x201D; elements present. A physical representation of dual-mode filters in terms of the eigenresonances of the dual-mode cavities, with the tuning and coupling elements present, is introduced. Two fourth-order dual-mode rectangular cavity filters with the same response in the passband and its vicinity are also presented to demonstrate the similar role played by &#x201C;tuning&#x201D; and coupling elements in dual-mode cavities. The first filter uses only &#x201C;tuning&#x201D; elements, while the second is based only on &#x201C;coupling&#x201D; elements. </para> IS - 2 JF - Microwave Theory and Techniques, IEEE Transactions on EP - 441 TI - Application of Representation Theory to Dual-Mode Microwave Bandpass Filters VL - 57 T2 - Microwave Theory and Techniques, IEEE Transactions on SP - 430 KW - dual-mode-waveguide-filter KW - filter-synthesis AU - Amari, S PY - 2009/// UR - http://dx.doi.org/10.1109/TMTT.2008.2011194 ER -