E-TUBE is a cost-and-power-effective all-electrical-domain wideband waveguide solution. The E-TUBE achieves an unprecedented level of performance in terms of bandwidth per carrier frequency, power, and density without requiring a precision manufacturing process unlike conventional optical/waveguide solutions. This new interconnect scheme for next-generation high-speed input/output (I/O) interfaces would be attractive to parties interested in high throughput links including, but not limited to, 100G/400Gbps chip-to-chip communications.