Researchers at the University of California, Davis have developed a standing wave architecture for scalable and wideband millimeter wave and terahertz radiator and phased arrays.
Current applications of millimeter wave (mm-wave) and terahertz (THz) frequency regimes are spectroscopy, imaging, radars and short range communication. Although successful, these methods demand power generation, radiation with sufficient radiated power and frequency control, and are both bulky and expensive. Even harmonic oscillators, employed in phased arrays to overcome the frequency, have the limited generation capabilities of transistors and require an array of sources in order to extract sufficient output power.
Researchers at the University of California, Davis have developed a standing wave architecture for scalable and wideband mm-wave and THz radiator and phased arrays. This new structure continuously distributes coherent arrays that avoid lossy and parasitic coupling networks and can easily be scaled by extending the size of the structure and replicating the unit cell. In addition, the structure enables the use of wide beam steering and high power radiation in phased arrays while completely avoiding the use of lossy phase shifters needed in conventional phased arrays. By completely removing the need for coupling circuitry and phase shifters between different elements in an array, this structure provides a cheaper and more efficient solution while being able to scale the array with no theoretical limits and having higher power arrays.
coherent power radiation, frequency tuning range, harmonic oscillator, millimeter-wave, terahertz, THz, circuits, phased array, standing waves, wideband power generation