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The FX5811 is a multi-mode multi-band front-end module (FEM) delivering both the power amplification and antenna switching functions. With the state-of-the-art integration design and advanced GaAs technology, this FEM supports both quad-band GSM/GPRS/EDGE(GSM850/EGSM900/DCS1800/PCS1900) and dual-band TD-SCDMA/TDD-LTE/5G-NR (Bands 39 & 34 ), with matched 50-Ohm RF input and output ports.The FEM also supports UMTS/LTE applicationsthrough 16 high linearity TRx ports.

The FX5811 consists of a GaAs HBT power amplifier, a SOI SP4T, a SOI SP6T, a SOI SP8T antenna switch, and a CMOS controller chip. The GaAs HBT power amplifier can work in saturated mode for GMSK, as well as in linear mode for GMSK, EDGE 8PSK and TDSCDMA/TDD-LTE operations. With delicately designed internal low-pass filters, this module provides excellent harmonic suppressions in all operating frequencies. The TRx ports are partitioned into three independent switch blocks, comprising 7 LB ports, 5 MB ports and 4 HB ports. Each switch block includes an integrated directional coupler that may be monitored on the CPL port. Three antenna configration provides simultaneous LB, MB and HB reception required for downlink CA . The FX5811 also guarantees robust 8kV high ESD protection for the antenna port.

Housed in a compact 5.5mmx5.5mmx0.75mm package, the FX5811 greatly lowers the front-end complexity of multi-mode GSM/GPRS/EDGE/TD-SCDMA/TDD-LTE/5G NR solution, facilitates the customer's implementation, and saves board room and cost significantly.