Reconfigurable dual-band to single-band filter based on a composite right/left-handed resonator

Reyes-Ayona, José Roberto; Vargas-López, Evelyn L.; Andrade-Ambriz, Yair A.; Kataria, Tejinder Kaur; Sierra-Hernández, J. M.; Estudillo-Ayala, J. M.

doi:10.1117/1.jnp.13.036011

Cited by 1 publication

(2 citation statements)

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“…An electromagnetic resonator in its simplest model states that its resonant frequency is f r = 1/(2π√( LC )). The associated inductance value L can be controlled and changed by a configuration D , and, consequently, the resonant frequency value will also be changed [ 14 ]. Thus, the resonant frequency value for our transmission-line-resonator sensor can be expressed as:

where c is the speed of light in vacuum, ε reff is the effective relative permittivity of the sample (from air when no sample is present), and l g ( D , N ) is the guided length of the resonator for the D configuration and N mode.…”

Section: Sensor Attributesmentioning

confidence: 99%

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Use of the Composite Properties of a Microwave Resonator to Enhance the Sensitivity of a Honey Moisture Sensor

Reyes-Ayona

Gallegos-Arellano²,

Sierra-Hernández

2021

Sensors

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A moisture sensor based on a composite resonator is used to measure different honey samples, which include imitation honey. The sensor changes its frequency response in accordance with the dielectric permittivity that it detects in the measured samples. Although reflectometry sensors have been used to measure the percentage of moisture in honey for almost a century, counterfeiters have achieved that their apocryphal product is capable of deceiving these kinds of sensors. Metamaterial features of the composite resonators are expected to improve their response when detecting lossy samples such as organic samples. It is also sought that these sensors manage to detect small differences not only in the real parts of the dielectric permitivities of samples but also in their imaginary parts, and, thus, the sensors are able to discern between real honey and slightly altered honey. Effectively, not only was it possible to improve the response of the sensors by using lossy samples but it was also possible to identify counterfeit honey.

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Section: Sensor Attributesmentioning

confidence: 99%

“…In this work, we aim to use the metamaterial attributes of reconfigurable microstrip resonators [ 13 , 14 , 15 ] to compensate the dielectric losses of honey. If losses could be compensated, a wider variety of organic samples could be identified by using microwaves.…”

Section: Introductionmentioning

confidence: 99%