The SKY68001-41 from Skyworks is a Multi-Band Front-End Module that supports cellular LTE M/NB-IoT (half-duplex) transceiver platforms. The module integrates the entire RF front end necessary for an LTE multi-band radio operating at low-band and mid-band frequencies, including Rx low-pass filters, a broadband PA with bias controller, a Tx low-pass harmonic filter, an antenna switch, and MIPI RFFE controller.
In Tx section, the PA load-line is optimized for high efficiency while simultaneously meeting 3GPP ACLR and emissions mask specifications with LTE up to 6 RB. An integrated LPF is implemented to reject the PA and transceiver harmonics while at the same time minimizing any post PA loss for an optimized transmit current consumption. In Rx section, low-pass filters are integrated into the module along with the necessary matching to yield a 50-ohm single-ended impedance for the antenna and Rx ports. The filters provide a high level of rejection to out-of-band interferers, protecting the transceiver from high blocking signal levels and to support 3GPP LTE blocking test conformance. The Rx low-pass filters are cascaded with the low throw count switch to establish a lower insertion loss and noise figure than conventional LTE receivers.
The SKY68001-41 is available in a 24-pin MCM package that measures 4.0 x 5.0 x 0.9 mm and is suitable for applications such as cellular IoT modem devices targeting LPWAN and LTE universal modem products.
