Ultra wideband coupler design for Butler Matrix application. - Nor Salehah Binti Muklas; Sharul Kamal Abdul Rahim; Norhudah Seman (APCC, 2011)

A Design of Compact Ultra Wideband Coupler for Butler Matrix. - Nor Salehah Binti Muklas; Sharul Kamal Abdul Rahim; Norhudah Seman; Dyg Norkhairunnisa Abang Zaidel; Kim Geok Tan; Ahmed Wasif Reza (Wirel. Pers. Commun., 2013)