Abstract
In this letter, a novel broad-band E-plane filter with improved stop-band performance is proposed. The spurious pass bands commonly encountered with standard E-plane filters are suppressed by integrating band-stop structures into the coupling elements of the filter and are realized by fin-line post structures. By optimizing the geometry of fin-line post structure, the proposed filter achieves improved stop-band performance and wide bandwidth simultaneously without any associated increase in the manufacturing complexity. The simulated and experimental results are presented to validate the proposed filter.
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