GSM & DCS Band Radio Frequency Unit is used to convert the GSM [900 MHz] and DCS [1800 MHz] uplink and downlink bands to an intermediate frequency [IF] of 76.8 MHz, each IF chain has 40MHz bandwidth. The Radio Frequency Unit will also include the RF chains for the functionality of up converting 6 intermediate frequencies at 76.8 MHz to GSM and DCS bands. The Radio Frequency Unit ensures that the up conversion and down conversion chains will be controlled by microcontroller and this MIC acts as a slave for external microcontroller. GSM & DCS Band Radio Frequency Unit generates its own LO’s through reference generation circuit and PLL’s.
