King Fahd University of Petroleum and Minerals

Sheikh Sharif Iqbal Mitu

Raj Mittra

Farooq Sultan

The ferrite-loaded, Fabry-Perot Cavity antenna uses a novel superstrate based beam scanning/shaping mechanism by optimally placing three magnetized ferrite cylinders within the cavity. Beam scan in a certain direction required oppositely located ferrite cylinder to be axially biased using externally controlled DC magnetizing field. The FPC utilizes a composite dielectric superstrate to inversely relate the mainlobe-to-sidelobe ratio with scan-angle, which demonstrates larger reduction in side lobe level with increases angle of beam scan. The designed 10 GHz ferrite-loaded FPC antenna has dimensions of 6.4 cm&#xd7;2 cm&#xd7;1.6 cm. It achieves a &#x2212;10 dB impedance bandwidth of 525 MHz, directivity of 11.04 dB and a broadside beam steering range of &#xb1;12&#xb0; for 200 kA/m (0.25 T) changes in the externally applied axial magnetizing field.

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Dhahran, Saudi Arabia

Sheikh Sharif Iqbal Mitu