A new type of the matching structure of a H-plane T-junction for a high power system

This paper presents a H-plane T-junction which is designed for the feed networks of waveguide antenna array. The purpose of the T-junction is to divide power and phase equally without any reflection. To do so, we usually add an iris or a post in the junction area so that this iris or post behaves as an inductor and makes each port of the tee-junction matched [l]-[4]. By changing its shape and the location, it can divide power equally without reflection. The rectangular waveguide have advantages of low loss and high power capacity over planar waveguides such as microstrip and coplanar waveguides. Thus, these advantages are suitable for delivering high power. However, the breakdown is still critical in high power system. Therefore, it is important to suppress a peak electric field which can be typically observed around discontinuity. In this paper, we compare which type of matching structure is suitable for the matching and peak electric field for high power system and suggest that a new type of the matching structure which is suitable for the high power system.