Synthesis of broadband differential phase shifters on electromagnetically coupled lines for multibeam antenna arrays

Authors: Gorbachev A. P., Parshin Yu. N.

Annotation: The work is devoted to the synthesis of differential phase shifters on electromagnetically coupled lines with a closed ring conductor. In comparison with the known phase shifters, the proposed structure is characterized by additional degrees of freedom in printed strip design and provides the possibility of designing multipath equidistant phased antenna arrays with operating frequency bands up to one and a half octaves, provided that the emitters of their antenna canvases are characterized by the same broadband, for example, printed logoperiodic emitters. With narrow-band emitters, the possibility of implementing a dual-frequency or multi-frequency mode of operation of a multipath antenna array opens up.

Keywords: differential phase shifter, coupled strip lines, directional coupler, antenna arrays