A directivity enhancement for directional couplers using additional coupled lines

Hideharu Yoshioka, Akimichi Hirota, Hidenori Ishibashi, Naofumi Yoneda, Moriyasu Miyazaki. A directivity enhancement for directional couplers using additional coupled lines. IEICE Electronic Express, 13(18):20160317, 2016. [doi]

Abstract

Abstract is missing.