1. ‘A planar waveguide slot antenna of single layer structure’, IEICE Tech. Rep., AP88-39, July 1988
2. High-gain and high-efficiency single-layer slotted waveguide array for use in 22 GHz band
3. ‘A waveguide-fed printed antenna’, IEICE Tech. Rep., AP89-3, Apr. 1989 p. 17–21
4. ‘A design of a multiple-way power divider for a single layered slotted waveguide array’, IEICE Tech. Rep., AP90-130, Feb. 1991 p. 29–34