Modeling the Complex Permittivity of Thermoplastic Composite Materials

Jackson, Mitchell L.; Stern, Curtis H.

doi:10.1080/08327823.1992.11688178

Cited by 7 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Calculation of dielectric properties of composites based on the rule of mixtures are widely studied and reported by many researchers and found that the effective permittivity of composites depend on the dielectric properties of its matrix and reinforcements with respect to its volume fractions and type of constituents. − This statement is well proven by the electromagnetic results such as ε′, ε″, tan δ, and transmission loss of composites realized with PEI-modified CE and pristine CE resins in Figure a–d. The data in Figure c,d provide important parameters for a radome design viz.…”

Section: Results and Discussionmentioning

confidence: 85%

Radar Transparent, Impact-Resistant, and High-Temperature Capable Radome Composites Using Polyetherimide-Toughened Cyanate Ester Resins for High-Speed Aircrafts through Resin Film Infusion

Gopinathapanicker

Inamdar

Anand

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

High-temperature capable (T g: 280–290 °C), broadband radar transparent [ε′: 3.3–3.9; ε″: 0.02–0.17; tan δ: 0.01–0.04 and transmission loss: −0.18 to −1.26 dBl in C, X, and Ku bands (5.4–18 GHz)], composites were developed using polyetherimide (PEI)-toughened bisphenol E cyanate ester resin and E glass fabrics through an out-of-autoclave process called resin film infusion at a range of PEI weight fractions via a solvent-free method. Their pronounced increase in impact resistance in terms of mode I interlaminar fracture toughness (G Ic; 50–100%), postimpact residual compressive strength (>85%), and enhanced structural properties such as tensile strength, compressive strength, in-plane shear strength, and interlaminar shear strength compared with control laminates, which later re-corroborated with a structure–property relationship using surface morphology proving that PEI-modified cyanate esters can find extensive applications in impact-resistant composite radomes for high-speed aircrafts.

show abstract

Section: Results and Discussionmentioning

confidence: 85%

Radar Transparent, Impact-Resistant, and High-Temperature Capable Radome Composites Using Polyetherimide-Toughened Cyanate Ester Resins for High-Speed Aircrafts through Resin Film Infusion

Gopinathapanicker

Inamdar

Anand

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The three-dimensional woven spacer microstrip antenna (3DWS-MA) with excellent electromagnetic performance and ultra-low density, as well as low-profile characteristics, is very suitable for use with aerofoils or other curved structures, such as electromagnetic transmission equipment in airplanes, satellites, or high-speed vehicles. However, the dielectric properties of 3DWSC and electrical resistance of conductive fibers can be sensitive to temperature change, 19–23 which may affect the electromagnetic performance of the 3DWS-MA. Therefore, the performance of 3DWS-MAs with different conductive fibers in various temperatures should be systematically investigated.…”

mentioning

confidence: 99%

Electromagnetic performance of three-dimensional woven spacer microstrip antenna with various conductive fibers in extreme temperatures

Zhang

Zheng

et al. 2021

Textile Research Journal

View full text Add to dashboard Cite

Due to its excellent light-weight, mechanical, and electromagnetic performance, the three-dimensional woven spacer microstrip antenna (3DWS-MA) has become a promising communication device to be applied in aerospace or high-speed vehicles. To explore the electromagnetic performance of 3DWS-MA in extreme environments, microstrip antennas based on three-dimensional woven glass fiber/epoxy spacer composites (3DWSC) with different conductive yarn (copper wire, nickel-coated carbon yarn and carbon nanotube yarn) were manufactured and tested at various temperatures (from –196°C to 150°C). The results showed that the 3DWSC exhibited superb dielectric properties ([Formula: see text]) with a low volume density of 0.5 g[Formula: see text]cm−3, rendering good electromagnetic performance of the prepared antenna (S11 value of –23 dB and gain of 7 dB). When the temperature increased from –196°C to 150°C, the dielectric constant of 3DWSC increased from 1.57 to 1.67, resulting in the decrease of resonance frequency of 3DWS-MAs (maximum offset is 60 MHz). In addition, the resistance changing ratios of the conductive fibers also reached 105% with the temperature increase, resulting in degradations of S11 values (maximum 17 dB). Furthermore, among the three types of 3DWS-MAs, the 3DWS-MA (carbon nanotube yarn) exhibited the most stable S11 value at low temperatures (from –196°C to 0°C), while the 3DWS-MA (copper) showed low return loss and stable resonance frequency at high temperatures (from 20°C to 150°C).

show abstract

Physics-based Computational Method Predicting the Dielectric Properties of Polymer Nanocomposites

et al. 2022

View full text Add to dashboard Cite

Modeling the Complex Permittivity of Thermoplastic Composite Materials

Cited by 7 publications

References 6 publications

Radar Transparent, Impact-Resistant, and High-Temperature Capable Radome Composites Using Polyetherimide-Toughened Cyanate Ester Resins for High-Speed Aircrafts through Resin Film Infusion

Radar Transparent, Impact-Resistant, and High-Temperature Capable Radome Composites Using Polyetherimide-Toughened Cyanate Ester Resins for High-Speed Aircrafts through Resin Film Infusion

Electromagnetic performance of three-dimensional woven spacer microstrip antenna with various conductive fibers in extreme temperatures

Physics-based Computational Method Predicting the Dielectric Properties of Polymer Nanocomposites

Contact Info

Product

Resources

About