Based On Substrate Integrated Waveguide New Horn Antenna

The rectangular waveguide structure, as we know, has advantages over other planar transmission lines for millimeter band applications, but its implementation in planar form seems to be difficult due to its 3D geometry. This difficulty was resolved a few years ago by the proposed substrate-integrated rectangular waveguide (SIRW). It is an artificial waveguide structure that is fabricated in planar substrate with periodic metallic cylinders, and preserves much of the properties of a conventional rectangular waveguide (RW). Substrate integrated waveguides have clear advantages over RWG including low cost, simple integration with planar devices, and a significant size reduction.The rectangular waveguide horn antennas have found many applications due to their excellent radiation properties such as symmetrical patterns, high gain, very wide bandwidth and easy fabrication. Similar to the RW above, due to the 3D nature and especially the horn size, the rectangular waveguide horns are difficult to integrate with planar circuits and system; this has limited their use for high performance satellite communications and radar applications.In this work, one novel H-plane horn antenna integrated easily into the planar SIRW was proposed and implemented. A dielectric arc lens is conveniently added to improve the directivity of the antenna. To continue the convenience, a simple transition to microstrip line is designed. The horn antenna, the microstrip transition and the dielectric arc lens are integrated into a single substrate, resulting in a very compact integrated planar antenna.