Answers are grounded in this paper and cite their sources.
In this paper, a novel substrate integrated waveguide (SIW) filter with asymmetric frequency response by using a non-resonating node (NRN) is proposed. The NRN was first implemented as a strongly detuned SIW resonator. This filter can realize a transmission zero either in the upper or in the lower stopband, and only positive coupling coefficient between each resonator and NRN is required. A third-order SIW filter with the center frequency of 15 GHz was constructed and measured, in which bandwidth is 300 MHz. The measured results agree well with the simulated results.
No takes yet. Share an insight, caveat, or question.
Li et al. (2013) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: