2.2-4.6-GHz Active Quasi-Circulator with > 24-dB Transmit-Receive Isolation. - Najam Muhammad Amin; Lianfeng Shen; Danish Kaleem Ansari; Zhi-Gong Wang; Keping Wang; Faisal Siddiqui; Rana Saeed; Haroon Rasheed; Burhan Ahmed (J. Circuits Syst. Comput., 2020)