Modified CSRRs in SIW technology for passband improvement
In this paper, a substrate integrated waveguide (SIW) loaded with three pairs of modified complementary
split-ring resonators (CSRRs) is presented, in which the subwavelength waveguide passband can be significantly
increased due to the appearance of new electromagnetic couplings between the different resonators. The obtained
results are compared to those provided by a more classical topology based on CSRRs periodically etched along the
waveguide wall, showing a significant bandwidthimprovement, while maintaining a good matching level.