Abstract: The theory of the confocal resonator is extended to include the effect of unequal aperture size and unequal radii of curvature of the two reflectors. The latter is equivalent to a periodic ...
Abstract: This paper investigates a frequency-tunable dielectric resonator antenna (DRA) using an electromechanical approach. To change the frequency, four movable cylindrical dielectric posts are ...
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Light is reflected internally at the edges of the resonator. This creates a series of standing-wave optical modes, or resonances, similar to those that can exist on a vibrating guitar string.