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In this paper, an original design of a directional coupler with five connected quarter-wave plumes is proposed. This number of loops allowed to increase the bandwidth of operating frequencies, but at the same time the length of such a device becomes large. This leads to the fact that it is necessary to use more dielectric material on which the micro-plane couplers are made. In order to reduce the cost of manufacturing the device can be used miniaturization of microplane devices. In this article the design of the c...