Planar helix slow-wave structure with straight-edge connections in the presence of coplanar ground planes. - Ciersiang Chua; Sheel Aditya; Zhongxiang Shen; Julius M. Tsai (ICICS, 2011)

Unconnected pair of planar helices with straight-edge connections for application in TWTs. - Chen Zhao; Sheel Aditya; Ciersiang Chua (ICICS, 2013)