Abstract
A high-Q sensor based on substrate integrated waveguide (SIW) technology is designed to fully characterize magneto-dielectric materials. By utilizing the negative resistance circuit, the quality factor is further increased to an ultrahigh value of 13,399. By virtue of the improved complementary split ring resonator (CSRR), the complex permittivity, as well as the complex permeability, can be extracted from variations of the resonant frequency and magnitude. A prototype of the designed active SIW-based sensor is fabricated and validated experimentally. A good agreement can be achieved between the measured values and the reference data.
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