Audio-frequency characterization of radar-absorbing material

1964 ◽  
Vol 52 (1) ◽  
pp. 98-99 ◽  
Author(s):  
L.C. Lynnworth
Keyword(s):  
Audio Frequency ◽  
Radar Absorbing Material ◽  
Absorbing Material

Audio-frequency characterization of cranial sutures via non-contact vibration experiments

2021 ◽  
Vol 150 (4) ◽  
pp. A185-A185
Author(s):  
Eetu Kohtanen ◽  
Matteo Mazzotti ◽  
Massimo Ruzzene ◽  
Alper Erturk
Keyword(s):  
Cranial Sutures ◽  
Audio Frequency

Development of Electroless Ni-P/NRAM Nanocomposite Powder with Enhanced Microwave Absorption Properties

2009 ◽  
Vol 67 ◽  
pp. 59-64 ◽  
Author(s):  
Rahul Sharma ◽  
Ramesh Chandra Agarwala ◽  
Vijaya Agarwala
Keyword(s):  
Electron Microscope ◽  
Microwave Absorption ◽  
Radiation Power ◽  
Nanocomposite Powder ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Radar Absorbing Material ◽  
Transmission Electron ◽  
Absorbing Material ◽  
Nanocomposite Powders

Nano radar absorbing material (NRAM) i.e. BaMe2Fe16O27 (Me2+=Fe2+) powder (10 nm) is coated with amorphous Ni-P nano layer (5-10 nm) by using electroless (EL) technology to develop EL Ni-P/NRAM nanocomposite powder. The experimental processes parameters and EL Ni-P bath composition were optimized to obtain the deposition. As-deposited nanocomposite powder was microwave annealed (MWA) with increasing radiation power from 160 to 760 watts for 5 minutes. The surface morphology, elemental contents, phase transformation and magnetic properties of NRAM powders were examined under field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) respectively. Maximum reflection loss (RL) 33.75 dB at 15.80 GHz for nanocomposite powder MWA at 760 watt was obtained the absorption range under −15 dB is from 13.76 to 16.77 GHz with 2 mm thickness layer in Ku Band. Excellent microwave absorption properties due to accurate electromagnetic (EM) match in the nanocomposite microstructure, a strong natural resonance and multipolarization. Such (Ni+ Ni3P)/NRAM nanocomposite powders may be attractive candidates for EM absorption.

scholarly journals Preparation and characterization of doubly substituted microwave absorbing material by sol-gel technique for super high frequency applications

2018 ◽  
Vol 28 (4) ◽  
pp. 478-482 ◽  
Author(s):  
Imran Sadiq ◽  
Shahzad Naseem ◽  
Saira Riaz ◽  
S. Sajjad Hussain ◽  
Muhammad Naeem Ashiq ◽  
...  
Keyword(s):  
High Frequency ◽  
Sol Gel ◽  
Absorbing Material ◽  
Gel Technique ◽  
Microwave Absorbing ◽  
Super High Frequency
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