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Diffraction synthesis and experimental verification of a quasi-optical power splitter at 150 GHz

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1 Author(s)
Magath, T. ; Arbeitsbereich Hochfrequenztechnik, Tech. Univ. Hamburg-Harburg, Hamburg, Germany

A general and flexible synthesis method based on the physical optics approximation is proposed for computing smooth-surface reliefs of reflectors. As a design example, the method has been applied to a quasi-optical power splitter consisting of two reflectors in a dual-offset configuration that couples a launched beam from a pyramidal horn antenna into a 2×4 horn antenna array. The two reflectors were treated as diffractive phase elements so that the proposed synthesis method allows reflector designs for many applications. The quasi-optical design has been confirmed at 150 GHz utilizing a vector field measurement system. The measured field distribution in the receiving antenna array plane is compared with the simulated one and shows a very good agreement.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:52 ,  Issue: 10 )