Katsufumi Ehata

High-Temperature Superconducting Microwave Passive Devices, Filter and Antenna

Shigetoshi Ohshima, Katsufumi Ehata, Takafumi Tomiyama, 2000 .

Effect of surface impedance on the antenna properties in superconducting microstrip antenna

Masanobu Kusunoki, Katsufumi Ehata, S. Ohshima, 1999 .

Fabrication of low surface resistance YBCO films and its application to microwave devices

Shigetoshi Ohshima, Masashi Mukaida, Katsufumi Ehata, 2000 .