Design of X-band SSPA based on GaN HEMT for telemetry subsystem of near-earth space missions

Active Quasi-Circulator based on Wilkinson Power Divider For Miniaturized Wireless Communication System

“…All kinds of components and circuits are playing an important role in the wireless personal communications systems [1][2]. In recent years, various kinds of filters, circulators and power dividers [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] have been studied. Such as: broadband active quasi-circulator operating in UHF and L-band [5]，compact active three-way circulators [6,7]， integratable active quasi-circulator [8,9,10]，low-loss hexagonal ferrite self-biasing microstrip and CPW circulators [11]， self-biased CPW circulator for Ku-Band [12], an X-Band quasi-circulator with GaAs MMIC [13], quasi-circulator with extra large isolation [14], a CMOS active quasi-circulator with a built-in rectifier [15], high-bandwith quasi-circulator [16,17,18], active three-way circulator using transistor feedback network [19], broadband eight-way differential SIW power divider [20].…”