Organic SIP based CDMA FEM with LC Resonant Tank Circuit

In this paper, organic SIP based CDMA FEM has been designed, fabricated, optimized, and characterized by using organic SIP (system in a package) technology and resonant tank circuits. The proposed organic SIP based CDMA FEM is comprised of a PAM (power amplifier module), two LC resonant tank circuits, an output matching capacitive circuit, a SAW duplexer, and a multi-layered organic substrate. The LC resonant tank is newly applied in the DC bias circuits of the proposed FEM in order to reduce the inductance values and to improve ACPR instead of conventional RF choke inductor. The fabricated FEM has a gain of 25.9dB, DC supply current of 387mA at 25dBm, ACPR1 of -50.8dBc at 885kHz, ACPR2 of -56.3dBc at 1980kHz, and PAE of 24% at 25dBm, respectively. The volume of the fabricated FEM is approximately 6mm times 5mm times 1.3mm (height)