Welcome To TU's Microwave Engineering Lab
The microwave engineering research group at Tezpur University is headed by Dr. Nidhi S Bhattacharyya and co-advised by Dr Satyajib Bhattacharyya. The group mostly focuses its research work in the areas of developing novel design microstrip antennas, engineered substrates, electromagnetic shielding materials (EMI) and also in computational electromagnetics.
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The microwave communication systems which include both civilian and military linkage requires a wide bandwidth (>500 MHz typically), low impedance mismatch, conformability etc. Many airborne applications need conformal microwave antennas. The scientific contribution to these state-of-art microwave devices is the soul aim of microwave engineering laboratory (MEL) of Department of Physics. This group is doing widespread research on the field of microstrip antennas, engineered substrates, electromagnetic shielding materials (EMI) and computational electromagnetics. MEL has developed indigenous characterization technique for microwave frequencies and designed various experimental set-ups within the laboratory. The following are the highlights of MEL research group,
Wireless technology stride towards gigahertz frequency applications in modern communication system has increased the electromagnetic interference (EMI), hindering the normal operations. Electromagnetic Interference (EMI) suppression is a major challenge for wireless communication devices, strategic military devices, electronic and consumer goods industries.
The research group working on electromagnetic interference shielding materials is focused on developing thin and light weight and thermally stable broadband microwave absorbing material with capability of being applied to various types of applications in the frequency range of 8.2-12.4GHz.
Two type of microwave absorber are developed viz. dielectric microwave absorber (DMA) and magnetic microwave absorber (MMA).
DMA is composed of expanded graphite (EG)-novolac phenolic resin (NRP) composite. This EG is mixed with NPR in different weight ratios to obtain desired EG-NPR combination as microwave absorbing materials.
MMA is composed of nanosized M-type hexagonal ferrites viz. BaFe12019 and SrFe12019 mixed with NPR in different weight ratios.
EG-NPR composites gives maximum absorption of -44dB at 10.99GHz and 20 to 50 wt% EG-NPR composites can be used as reflecting shielding material giving S21~-43dB over the X-band. BaFe12O19/NPR composites give -20dB absorption bandwidth of 3.76GHz in the X-band.
The developed product will have use in mobile communications system, anechoic chamber, handheld devices, transmitting and receiving antennas, protecting circuits, strategic installations, human body from external radiation etc.