4 Channel Downconverter Receiver with Integrated Guard Channel Supportive Calibration

This paper present unique design technique of 4 channel downconverter receiver for monopulse AESA based target tracking radar. Sum and difference channels are designed along with Guard channel which possess extra gain requirement and stringent noise figure as per system requirements. Supportive calibration mechanism via innovative switch circuitry is incorporated along with Guard channel thus avoids need of dedicated additional channel. In line with system needs design methodology is chosen, block diagram is developed, circuit and EM simulations are carried out in ADS, CST and Cascade software and critical aspects of designing such receiver are also disclosed.