In industrial systems, massive content, such as high-quality video and a large amount of sensing data, should be exchanged between Industrial Internet of Things (IIoT) devices under strict deadlines.

A new lumped-circuit directional coupler is described for the 1-30 MHz frequency range. Directivity greater than 50 dB is achieved over this frequency range for coupling ratios of 30, 40, and 50 dB.