A compact Vivaldi antenna study by Yuta Sugihara, Hideaki Miyamoto and Makito Kobayashi was accepted on 27 August 2026 and published in Microwave on 9 September 2026.
The design introduces wide, tilted rectangular slots into a compact antenna on a high-permittivity substrate. Electromagnetic simulations show improved realized gain at lower frequencies without increasing the antenna’s size.
The paper also discloses a University of Tokyo patent application relating to the slot structure.
Enhanced Realized Gain of a Compact Coplanar Vivaldi Antenna on a High-Permittivity Substrate Using Wide Tilted Rectangular Slots
Yuta Sugihara, Hideaki Miyamoto, Makito Kobayashi
Microwave 2(3), 14 (2026).