Abstract: Two-dimensional (2-D) arrays offer volumetric imaging capabilities without the need for probe translation or rotation. A sparse array with elements seeded in a tapering spiral pattern ...

Abstract: To generate high-power, high-directivity terahertz (THz) radiation, in this article, we propose and fabricate a 2-D resonant-tunneling-diode (RTD) THz oscillator array. The array is formed ...