A Printed Transition for Matching Improvement of SIW Horn Antennas

Marc Esquius-Morote, Benjamin Fuchs, Jean-Francois Zurcher, Juan R. Mosig
2013 IEEE Transactions on Antennas and Propagation  
The substrate integrated waveguide (SIW) technology allows to construct several types of commonly used antennas in a planar way. However, frequency limitations associated to commercial substrates appear in the implementation of certain types of antennas, e.g., SIW horn antennas are not well matched when the substrate thickness is much smaller than the wavelength. A printed transition is proposed to overcome this problem. Differently from current solutions, no bulky elements are required
more » ... re required allowing to maintain the most important features of this technology namely its compactness and ease of manufacturing. In order to quickly analyze and design the transition, both a coupled resonator and a transmission line models are developed, together with design guidelines. The proposed transition is designed to match a H-plane SIW horn antenna built in a thin substrate at different frequency bands at the Ku-band. Experimental results for 3 different transitions show that the matching characteristics are efficiently improved compared with the conventional SIW horn antenna and validates the proposed models. Index Terms-Bandwidth, horn antenna, low profile, matching, printed transition, substrate integrated waveguide.
doi:10.1109/tap.2012.2231923 fatcat:wcyneisjone2tabbwwnumw42n4