Description of a Miniaturization Tool for a Directional Coupler on a Microwave Substrate

This paper describes a tool that allows you to quickly and easily get a compact topology of a planar microwave device. The description was based on a conventional 2 GHz coupler. The whole approach to miniaturization of the coupler is to synthesize the necessary structures. These structures consist of a combination of an inductive and capacitive element, this allows you to get similar characteristics with a conventional line, but the structure has a significantly shorter length. The installation of such structures in place of the segments and allows for the miniaturization procedure. However, of course, with miniaturization, a negative effect arises of changing the frequency characteristics, in the direction of their deterioration.