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The design of a new type of quasi-optical mode converter mirror system

In this paper, a novel method for construction a fair mirror is proposed. Based on such the mirror, a quasi-optical mode converter for a 70-GHz TE6,2 mode has been designed. Numerical calculation shows that Gauss content of the output beam is more than 95% and basically agrees with the simulation. The mirror by the method has the advantages of fair surface that is easy to be processed with small machining error.