DC-50GHz wideband phase-compensated 90nm-CMOS active balun design

Low imbalanced fully matched active baluns design for 21GHz upconversion mixer

“…Then [6] improved their method and proposed a balun model with a wider band up to 20GHz, but the phase error increases. Recently, a DC-50GHz phase-compensated active balun by using a common source/drain topology with less than 5 degrees phase error was reported [7]. However, the configuration is more complicated.…”

Gallium arsenide 0.5–18 GHz antenna front‐end with integrated limiter and differential to single ended low‐noise amplifier

“…Actually, a large number of broadband amplifiers with a non-zero common-mode amplification has been reported in the literatures [1][2][3][4][5] and they require an additional balun to drive differential mode antennas. Many solutions have been already proposed in the literatures [6][7][8][9][10][11][12][13][14][15][16][17][18][19], both as passive or active architectures, but all of them experiment some drawbacks for the considered application. Typically, a balun composed of passive components has a large size (in the order of several square centimetres), and usually has a relatively narrow bandwidth.…”

“…Moreover, also the impedance transformers realised with passive components require a large size at the considered microwave frequency range. On the other hand, the relative bandwidth constraint, combined with the capability to handle high-power levels are critical points for active solutions and prevent, de facto, the use of complementary metal-oxidesemiconductor (CMOS) architectures for these kinds of applications [6][7][8][9][10][11]. Moreover, in the almost totality of applications, an input protection is mandatory.…”