Title :
Cylindrical inhomogeneous dielectric magneto-hydro-dynamic antenna
Author :
Gupta, Rajesh ; Yaduvanshi, Rajveer ; Sharma, Toshi
Author_Institution :
ECE Dept., Maharaja Surajmal Inst. of Technol., Delhi, India
Abstract :
The paper investigated stacked cylindrical DRAs, placed on concentric annular rings of dissimilar diameters. The hybrid structure filled with mixture of Silicon oil and Barium Strontium Titanate has been operating under controlled E-electric fields and H-magnetic fields to produce Lorentz Force on the conducting fluid. Lorentz force thus produced velocity into the fluid, which is making direct contact with feed probe. The fluid velocity v becomes function of Poynting vector. When applied electric bias to fluid resonator was varied from 5V to 30V i.e. Antenna Gain also varied from 1.5 dB to 11.09 dB. 2500 Tesla Magnetic bias produced from permanent magnets altered impedance bandwidth and operating frequency. The controlled frequency shift made this antenna frequency agile. This can be wisely used for getting antenna re-configurability. Reconfiguration application of this antenna can be best suited for software defined radios and Military.
Keywords :
barium compounds; conducting materials; dielectric liquids; dielectric resonator antennas; magnetohydrodynamics; silicones; strontium compounds; (BaSr)TiO3; Lorentz force; Poynting vector; Tesla magnetic bias; concentric annular rings; conducting fluid; cylindrical inhomogeneous antenna; dielectric magnetohydrodynamic antenna; dielectric resonant antenna; electric fields; feed probe contact; fluid resonator; frequency agile antenna; frequency shift control; gain 1.5 dB to 11.09 dB; hybrid structure; impedance bandwidth enhancement; magnetic fields; permanent magnet; reconfigurable antenna; silicon oil; stacked cylindrical DRA; voltage 5 V to 30 V; Antenna radiation patterns; Fluids; Gain; Magnetic resonance; Magnetohydrodynamics; Annular ring; Cylindrical DRA; Electric and Magnetic Bias; High Gain; MHD;
Conference_Titel :
Computing for Sustainable Global Development (INDIACom), 2014 International Conference on
Conference_Location :
New Delhi
Print_ISBN :
978-93-80544-10-6
DOI :
10.1109/IndiaCom.2014.6828078