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This paper presents a novel approach to realize a low-cost wide tunable Whispering Gallery Mode (WGM) resonance-based structure at Millimeter-wave and sub-THz range of frequencies. The tunability is achieved by moving a metallic structure over the WGM resonator using a micro-positioner. Perturbing the WGM resonance causes shift in the resonance frequency and the coupling. Two types of perturbation...
A highly efficient terahertz photoconductive antenna (THz-PCA) has been developed as a wideband terahertz detector for terahertz time-domain spectroscopy (THz-TDS) systems with a periodic bias line structure to remove unwanted reflections and enhance the frequency resolution. This novel THz-PCA is characterized in a THz-TDS system using a 100 fs optical pulse excitation from which a terahertz pulse...
This paper presents a double-balanced CMOS down-conversion mixer for 60-GHz receivers, although the mixer is designed specifically for a phased array receiver architecture. The proposed mixer uses two on-chip baluns implemented with the two top metal layers in a 0.13-μm CMOS technology. The baluns provide 180° differential outputs from applied single-ended input at the radio-frequency (RF) and local-oscillator...
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