Answers are grounded in this paper and cite their sources.
The substrate integrated H-plane horn antenna has been struggling with very limited impedance bandwidth since its invention, which is coming from its natural aperture discontinuity. Apart from a variety of series transitions introduced so far, here, parallel transitions are applied to the antenna aperture in addition to narrow slots on the horn walls around the aperture to widen the antenna impedance bandwidth. It is shown that the depth of the transitions can easily determine the center frequency of the matching bandwidth. The new parallel transitions also reduce the antenna back radiation since they act as chokes around the horn aperture.
No takes yet. Share an insight, caveat, or question.
Bayat-Makou et al. (2016) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: