Active feedback amplifier approach for microwave filter. - Wai-Wa Choi; Kam-Weng Tam; P. Vitor; Rui Paulo Martins (ICECS, 1999)

New microwave bandstop filter using lumped and transversal network. - Kam-Weng Tam; P. Vitor; J. C. Freire; Rui Paulo Martins (ISCAS (6), 1999)