Conformal integration of traveling-wave slot antennas in millimeter-wave regime

A design of feeding transition for conformal integration of traveling-wave slot antennas in the millimeter-wave regime is presented in this paper. The design utilizes a shielded half-mode substrate-integrated waveguide (HMSIW) bent section to provide an efficient transition from a coaxial connector to the antenna. A curved ground plane, such as the surface of a cylindrical pole, mimics an infinite ground plane and thus minimizes ripples in the azimuth-plane radiation pattern. The design is demonstrated with two antenna applications, including a wideband broad beam antenna and a directive leaky-wave antenna with minimized sidelobe level.

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