Equal Power Division Directional Coupler and Compact Dimensions in Modern Maritime Communications

This work is devoted to the development of a miniature directional coupler with a wide passband for maritime communications equipment. Artificial transmission lines having similar characteristics with quarter-wave segments, of which the directional coupler consists, are considered. Based on the calculations, a miniature coupler was modeled. Based on the simulation results, it can be judged that a working model of the device with an area of 70% less than with a traditional design was obtained. The miniature coupler is assembled for a frequency of 0.9 GHz and has a band of 67.5%. The relevance of the development is confirmed by the increased demand for compact microwave devices.