Dual Notch Microwave Sensors Based on Complementary Metamaterial Resonators

Abstract

In this paper, three dual notch microwave sensors are presented based on a microstrip transmission line and complementary metamaterial resonators. The main aim of this paper is to compare the constitutive parameters and sensitivity of all three dual notch sensors which are based on complementary symmetric split ring resonator (CS-SRR), complementary asymmetric split ring resonator (CAS-SRR) and complementary bisymmetric split ring resonator (CBS-SRR). The main motivation beyond the presented work is to use dual notches to estimate the relative permittivity of material under test (MUT). Electromagnetic simulation elucidates the origin of dual mode resonance of all the three resonators. Sensitivity analysis is performed on each sensor by using fifteen MUTs with relative permittivity ranges from 1.006 to 16.5 and constant dimensions 10 mm × 10 mm × 1 mm. To verify the concept, a sensor is fabricated and its response is measured using a vector network analyzer (AV3672). Using curve fitting technique the shift in the resonance frequencies of the fabricated sensor due to interaction with MUT is presented as a function of permittivity. Simulated, measured and formulated results are in good agreement with each other.

Millimetre-Wave Metamaterial-Based Sensor for Characterisation of Cooking Oils

“…e magnetic field's stored energy is typically equal to the energy stored due to the electric field at the resonance frequency. Conversely, the magnetic and electric fields form a new resonance by altering the material under test (MUT) insertion on or near the resonator depending on the variation in permittivity, permeability, and MUT volume [33]. In this study, the MUT was introduced on the sensor covering its entire surface, as shown in Figure 9, where MUT can be termed as an overlayer.…”

Characterization of Dielectric Substrates Using Dual Band Microwave Sensor

“…Recently reported dual band sensors are based on MTL with magnetically coupled SRRs or electrically coupled CSRRs. These sensors have a sensitivity limitation due to the low Q factor and poor coupling between the MTL and the resonator [29][30][31]. In [29], a dual notch microwave sensor based on MTL and two SRRs is presented that is operating at 2.34 GHz and 2.74 GHz, and a maximum Q factor of 137 is achieved.…”

DNG Metamaterial Reflector Using SOCT Shaped Resonator for Microwave Applications

“…But the features come with a limitation of poor capacitive coupling effect and reduces the sensitivity. Besides, reported articles [25][26][27] has large geometry since resonating principle and architecture is based on size of the resonator. Therefore, prospective application field of the microwave sensors become incompatible for small scale integration.…”