Abstract

This work presents how reflection phase can be exploited to design fully-canonical inline extracted pole filters featuring transmission zeros in both stopbands while implementing all non-resonant nodes of the same reactive nature. This approach allows to place up to two transmission zeros in the opposite stopband and overcomes the traditional concept that extracted pole sections should have non-resonant nodes of different nature depending on the stopband where they locate their pole. This feature is specially useful in technologies where only one nature of non-resonant nodes is easily fabricated. To validate the proposal two prototypes have been fabricated with only capacitive or only inductive non-resonant nodes.

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