Magnetodielectric and low-frequency microwave absorption properties of entropy stabilised ferrites and 3D printed composites

Indium tin oxide as a dual-band compatible stealth material with low infrared emissivity and strong microwave absorption

“…Based on the transmission line theory and the measured EM parameters, reflection loss (RL) values at different thicknesses in the range of 2–18 GHz can be simply calculated, and the equations are as follows,where Z in and Z 0 are the input impedance of the absorbers and the impedance of free space, respectively, μ r and ε r are the complex permeability and complex permittivity, f and c are the free space EM wave frequency and light velocity, and d is defined as the thickness of the absorber. 2,10,42…”

“…where Z in and Z 0 are the input impedance of the absorbers and the impedance of free space, respectively, m r and e r are the complex permeability and complex permittivity, f and c are the free space EM wave frequency and light velocity, and d is defined as the thickness of the absorber. 2,10,42 Generally, the RL value less than À10 dB is called as effective absorption, and the corresponding MA degree is more than 90%. Hence, the frequency ranges with RL values below À10 dB are regarded as the effective absorption bandwidth (EAB).…”

Advancements in Microwave Absorption Motivated by Interdisciplinary Research

“…This technology has been initially applied in the production of macro-EM devices. [116][117][118][119][120][121][122][123] Thermoplastics such as PLA, ABS, and PVA, as well as photosensitive resins, have been used to build 3D absorbers through FDM, SLA, and DLP methods. SLS printing was also utilized to build a honeycomb structural absorber via a high-power laser beam.…”

UV‐Curable 3D‐Printable Microwave‐Absorbing Material with a Sword‐Sheath Structure Based on Multiwalled Carbon Nanotube/Polypyrrole Nanotube/Fe3O4 Composites

“…The polymer matrix can incorporate diverse materials, such as rubbers, plastics, and resins, thereby catering to a wide range of practical application requirements. [ 18–20 ] At present, polymer‐based microwave structures for three‐dimensional (3D) printing are obtained mainly using fused deposition modeling printers, which have low printing accuracy (usually around 500 μm). [ 21–27 ]…”

“…The polymer matrix can incorporate diverse materials, such as rubbers, plastics, and resins, thereby catering to a wide range of practical application requirements. [18][19][20] At present, polymerbased microwave structures for three-dimensional (3D) printing are obtained mainly using fused deposition modeling printers, which have low printing accuracy (usually around 500 μm). [21][22][23][24][25][26][27] Stereolithography apparatus (SLA) stands out as one of the most precise 3D printing methods, demonstrating a commendable accuracy that generally reaches 10 μm.…”