Communications equipment. The TopRxFEM is an integrated circuit chip with four inputs and one output. The chip operates at the DBAND frequencies (130GHz-170GHz). The four input signals are coming from four separate antennas. Each of the input signals are amplified by a separate LNA and then are all combined together by a 4 to 1 passive combiner. A programmable phase shifter controls the combined signalâââÅ¡¬ââÅ¾¢s phase from 0 to 360 degrees. Finally, the combined signal is again amplified via a Variable Gain Amplifier. This integrated circuit chip is the front end module (FEM) of a phased array receiver. In addition, in the Rx FEM the following blocks are included; a bandgap reference circuit, a bias current generator, a SPI (Serial Peripheral Interface) and a temperature sensor.