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One way to proof or exclude the existence of axion like particles is amicrowave light shining through the wall experiment. In this publication wewill emphasize on the engineering aspects of such a setup, currently underdevelopment at CERN. One critical point, to achieve meaningful results, is theelectromagnetic shielding between axion-emitter and -receiver cavity, whichneeds to be in the order of 300 dB to improve over existing experimentalbounds. The RF leakage or electromagnetic crosstalk between both cavities mustbe well controlled and quantified during the complete duration of theexperiment. A very narrow band (in the 10^-6 Hz range) homodyne detectionmethod is used to reveal the axion signal from background thermal noise. Thecurrent status of the experiment is presented.

Status report of the CERN light shining through the wall experiment with microwave axions and related aspects