Analysis of a New Method to Design a Coaxial-to-Rectangular Waveguide Transition

In this letter, a novel design of Ku-band end-launcher coaxial-to-rectangular waveguide transitions is presented. Return loss of −25dB with insertion loss of −0.5dB has been confirmed experimentally cover frequency range of 11∼19GHz, bandwidth of 50% is attained. Nonstandard waveguide port with an internal dimension of $15\text{mm}^{\ast}4.5\text{mm}$ is employed. Transversal miniaturization is achieved by contrast with Ku-band transitions terminated in standard waveguide WR62 with size of $15.8\text{mm}^{\ast}7.9\text{mm}$.