Title | Ultra Compact Inline E-Plane Waveguide Bandpass Filters Using Cross Coupling |
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Type | Journal article |
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Authors | Mohottige, N. |
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| Glubokov, O. |
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| Jankovic, U. |
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| Budimir, D. |
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Abstract | This paper presents novel ultra-compact waveguide bandpass filters that exhibit pseudo elliptic responses with ability to place transmission zeros on both sides of the passband to form sharp roll offs. The filters contain E plane extracted pole sections cascaded with cross-coupled filtering blocks. Compactness is achieved by the use of evanescent mode sections and closer arranged resonators modified to shrink in size. The filters containing non-resonating nodes are designed by means of the generalized coupling coefficients (GCC) extraction procedure for the cross-coupled filtering blocks and extracted pole sections. We illustrate the performance of the proposed structures through the design examples of a third and a fourth order filters with center frequencies of 9.2 GHz and 10 GHz respectively. The sizes of the proposed structures suitable for fabricating using the low cost E plane waveguide technology are 38% smaller than ones of the E plane extracted pole filter of the same order. |
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Keywords | Inline filters, E-plane filters, extracted pole filters, waveguide filters, generalized coupling coefficients. |
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Journal | IEEE Transactions on Microwave Theory and Techniques |
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Journal citation | 64 (8), pp. 2561-2571 |
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ISSN | 0018-9480 |
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Year | 2016 |
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Publisher | IEEE |
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Accepted author manuscript | |
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Digital Object Identifier (DOI) | https://doi.org/10.1109/TMTT.2016.2578329 |
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Publication dates |
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Published online | 23 Jun 2016 |
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Published in print | Aug 2016 |
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