Terahertz frequency scanning 8×1 antenna array for imaging applications

An 8×1 frequency scanning antenna array has been presented for its operation in the 255–330 GHz frequency band. The antenna has been implemented using WR-3 rectangular waveguide structures and power combiner waveguide-structures in brass metal using mechanical micro-milling facilities. The antenna has been measured using a vector network analyzer and two 220–330 GHz frequency extender heads. The obtained steering range while varying the operation frequency in the 255–330 GHz range has exceeded successfully the required steering range of Δ θ = 40°.