Master Colloquium
Henrik Silas Alt	ORATED

MPIfR

Sideband separating receivers (2SB) are a widely used type of heterodyne receivers in radio astronomical observations, allowing the simultaneous observation of the lower and upper sideband. However, phase- and amplitude imbalances of the signals limit the achievable sideband-separation ratio (SRR) of these receivers, caused by imperfections of the analog components. This thesis presents a processing-pipeline for digitally compensating these analog imperfections, by determining and applying imbalance-compensating parameters in combination with a digital implementation of an IF-hybrid. The processing-pipeline was tested with synthetic data, a low-frequency test-setup with frequencies below 10 GHz and a high-frequency test-cryostat setup, operated in the mm/submm regime around 340 GHz, showing a clear improvement in sideband separation for all test-cases.