Spatially modulated metamaterial array for transmit (SMMArT)

Borrowing from slow-light optics, a metamaterial-based transmit array is conceived that employs a low-group-velocity serial feed line. This feed configuration facilitates a new manner of physical implementation for fast-time spatial modulation of a radar waveform based on the development of a serial-fed slotted Clarricoats-Waldron waveguide, thus realizing a physical MIMO radar implementation that avoids the need for phase-shifters and requires only a single waveform generator. The theory and principles of operation for SMMArT are presented, as well as the electromagnetic design principles for the low-group-velocity waveguide structure. High-power and planar array manifestations are also discussed.