Abstract
This paper presents a novel two-section coaxial stepped impedance resonator based on the integration of parallel coaxial sections in the central part of the structure. Compared with the classical approach, this topology adds a new degree of freedom to the design, allowing an improvement of the quality factor, multipactor threshold and fabrication tolerances. To demonstrate these advantages, we designed an example of a 4 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> -order filter in L band. This filter was fabricated in aluminum and measured. The experimental results are presented and discussed.
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