Dielectric resonator antenna

About: Dielectric resonator antenna is a research topic. Over the lifetime, 8199 publications have been published within this topic receiving 111090 citations. The topic is also known as: DRA.

Mechanical Coupling of 2D Resonator Arrays for MEMS Filter Applications

Abstract: This paper presents a study of mechanical coupling in 2D resonator arrays for filter applications. A robust coupling design for 2D array filters, comprised of weak coupling in one dimension and strong coupling in the second, is demonstrated experimentally and compared with weakly coupled and electrically summed 2D resonator array filters. Effects of inherent disorder in resonator arrays due to fabrication variations are minimized in this mechanical coupling scheme, averaging over resonator mismatch to form a smooth pass-band. The strongly-coupled 2D filter improves insertion loss and ripple without degradation in filter shape factor or stop-band rejection relative to its ID counterpart.

Polarization effect in optical-fiber ring resonators.

Abstract: The effect of birefringence on the resonance frequency of a closed-loop fiber-optic resonator is calculated.

Miniaturized Quasi-Lumped Resonator for Dielectric Characterization of Liquid Mixtures

Abstract: A novel miniature sensor operating at 150 MHz for real-time sensing of fluid concentrations is presented. The core of the sensor is a planar double-sided spiral split-ring resonator (DSS-SRR). At resonance, a strong electric field will be established mainly in the interdigital region of the DSS-SRR, producing a very sensitive area to a change in liquid concentration. A prototype is fabricated on RT/Duroid 5880 substrate and calibrated using deionized water/ethanol mixture. A mathematical model is derived to establish a relationship between resonance frequency and permittivity for sensor calibration. Good agreement has been reached between the actual and estimate values of permittivity. The proposed sensor offers other advantages, as high sensitivity, small sample volume, short assay time, low cost, and lab-on-a-chip compatibility. The major potentials are set in evidence from comparison with the state-of-the-art sensors.

Wireless high-temperature sensing with a chipless tag based on a dielectric resonator antenna

Abstract: This paper presents a wireless temperature sensor, which enables high-temperature operation due to its passive and chipless design. The sensor uses radio-frequency backscattering techniques to encode and transmit the measured value: The resonance frequency of a dielectric resonator on the sensor tag is determined as a peak in its radar cross section. The tag is built from a half-split cylindrical ceramic resonator with temperature-dependent permittivity and resonance frequency. It offers wireless reading without need for reference measurements of radar clutter due to the resonator's high quality factor and applied time-gating. Wireless indoor measurements have proven the sensor concept. These measurements were performed in a temperature range between 20°C and 370°C, where the resonance frequency of the tag lies around 3GHz with a temperature sensitivity of 307 kHz/K.