An X-band coaxial-to-rectangular waveguide transition

In this letter, a novel design of X-band coaxial-to-rectangular waveguide transitions is presented. The transition includes an original waveguide-to-coaxial mode converter and modified impedance transformer. Detailed design concept is presented. Feasible way to optimize performance of the transition is analyzed and verified. Very good performance (S11 lower than -30 dB) of the transitions was achieved via multy parametric optimization.