Improved approach using symmetric microstrip sensor for accurate measurement of complex permittivity

Sun, Haoran; Tang, Tao; Du, Gonghuan

doi:10.1002/mmce.21258

Cited by 19 publications

(13 citation statements)

References 47 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured results agree with the reference values and the absolute errors are computed as 1.11%, 0.17%, and 1.33%, respectively. The error calculation method is using the method reported in Reference 20, as given by

% abs . error = ((), \frac{{normalV}_{normalM}}{{normalV}_{normalR}} - 1) \times 100 %

where V R is the reference value, and V M is the measured value. The percent absolute error of each DS is worked out and compared with other methods as shown in Table 6 .…”

Section: Regulation and Determination Of Complex Permittivitymentioning

confidence: 99%

Determination of dielectric properties of unknown substrates using hybrid approach

Chung

Guan

Cui

et al. 2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

Unknown dielectric properties of RF/microwave substrates cause headaches for microwave circuit and antenna designers. Most commercial reinforced dielectric substrates made from layers of woven‐glass and/or ceramic fillings lead to dielectric anisotropy. Often, re‐optimization and even re‐fabrication of designed prototypes are required when measuring results are found to be departed from the prediction. These are time consuming and costly. In order to determine the unknown complex permittivity of any substrates, this paper describes a hybrid approach composed of two measurement stages. The first stage is the coaxial‐probe method for predicting an initial complex permittivity of unknown dielectric substrates, which is known as the perpendicular permittivity. The second stage is the microstrip open‐circuit stub (OCS) method that regulates the complex permittivity of the dielectric laminate by mapping the input impedance curves of OCS via electromagnetic simulation and actual measurement. Three dielectric substrates without prior dielectric properties were selected to validate the proposed method. The equivalent dielectric constants, dissipation factors and dielectric anisotropies were determined and compared. The proposed method is found to be reliable for determining the unknown properties of dielectric substrates.

show abstract

% abs . error = ((), \frac{{normalV}_{normalM}}{{normalV}_{normalR}} - 1) \times 100 %

where V R is the reference value, and V M is the measured value. The percent absolute error of each DS is worked out and compared with other methods as shown in Table 6 .…”

Section: Regulation and Determination Of Complex Permittivitymentioning

confidence: 99%

Determination of dielectric properties of unknown substrates using hybrid approach

Chung

Guan

Cui

et al. 2020

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…Out of many planar resonant structures, metamaterial unit cell-based sensors have gained more popularity due to their compact size, improved sensitivity, and excellent resolution compared with other planar sensors [15–17]. Metamaterial inspired sensors are usually realized using metamaterial unit cell-based resonators such as interdigitated capacitors (IDCs) [18], split ring resonators (SRRs) [19], and complementary split ring resonators (CSRRs) [20, 21]. The electrical size of the sensing area in the metamaterial unit cell-loaded sensors is relatively small, and hence it is possible to develop compact planar RF sensors for biomedical applications where the available sample volumes are minimal in quantity [15, 22].…”

Section: Introductionmentioning

confidence: 99%

Flexible biomedical RF sensors to quantify the purity of medical grade glycerol and glucose concentrations

Tiwari

Singh

Mondal

et al. 2019

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

A novel flexible radio frequency (RF) sensor is designed to facilitate the accurate testing of various samples used in the biomedical industry at the industrial, scientific and medical (ISM) frequency band. The proposed RF biosensor comprises a liquid channel-loaded interdigitated capacitor, which is integrated on a coplanar waveguide structure. The prototype of the sensor is fabricated on a 0.13 mm thin biodegradable polyethylene terephthalate polyester film to perform the testing of various bio-graded samples by recording the corresponding resonant frequency. It is observed that there is a noticeable change between the measured resonant frequencies of these samples, which primarily occurs due to the difference in their dielectric properties. The designed sensor was used to monitor and investigate the quality of glycerol, which is the most commonly used raw ingredient in the biomedical and food industry. The determination of glucose concentration in base fluids is considered to ease the challenges faced by doctors and biochemists regarding the monitoring of glucose concentration. It is found that the proposed sensor can quantify the glycerol purity up to the minimum specified adulteration level of 2 and 1% corresponding to toxic contaminants diethylene glycol and ethylene glycol, respectively, and the glucose concentration of 0.5 mg/ml.

show abstract

“…Some investigation using various configurations including substrate integrated waveguide (SIW), and microstrip transmission line have been developed . In addition, active resonator sensors were presented in Reference , which depends on the active feedback loop to increase the sensing resolution for permittivity measurement.…”

Section: Introductionmentioning

confidence: 99%

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Sun

Guo

et al. 2019

Int J RF Microw Comput Aided Eng

Self Cite

View full text Add to dashboard Cite

This article presents the developing of interdigital capacitor (IDC) based symmetric coplanar waveguide (CPW) sensor to characterize the complex permittivity of unknown dielectric sheets. The symmetric structure is realized by using two identical 3 dB CPW dividers where each branch is loaded with an IDC unit. The proposed method is designed using three, five, and seven fingers of the IDC unit, and the measurement sensitivity is analyzed accordingly. The permittivity of tested samples is extracted by the genetic algorithm. To validate the robust sensing performance of the proposed method, simulation and experimental tests are performed and analyzed, and the accuracy is compared with published values. The proposed method gives the maximum error of 3.42%. With the feature of high-sensitivity, the proposed sensor can be used as an excellent candidate for determining the permittivity of materials in microwave frequencies.K E Y W O R D S coplanar waveguide, high sensitivity, interdigital capacitor, permittivity extraction, symmetric sensor

show abstract

Improved approach using symmetric microstrip sensor for accurate measurement of complex permittivity

Cited by 19 publications

References 47 publications

Determination of dielectric properties of unknown substrates using hybrid approach

Determination of dielectric properties of unknown substrates using hybrid approach

Flexible biomedical RF sensors to quantify the purity of medical grade glycerol and glucose concentrations

Symmetric coplanar waveguide sensor loaded with interdigital capacitor for permittivity characterization

Contact Info

Product

Resources

About