King Fahd University of Petroleum and Minerals

King Abdulaziz City for Science and Technology

Farooq Sultan

Salam Adel Zummo

Raj Mittra

Ahmar Shafi

Sheikh Sharif Iqbal Mitu

Munir A Kulaib Al-Absi

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.

Ferrite-loaded, Fabry-Perot cavity antenna

The wireless sensor network with energy efficient protocols includes a network of external sensors in communication with a data sink. The network utilizes an algorithm integrating a modified S-MAC (an algorithm for medium access control) protocol for decreasing energy usage in operating the node and associated sensors. A routing protocol is further integrated into the algorithm, the routing protocol being based upon cluster head rotation.

Wireless sensor network with energy efficient protocols

Growing community of inventors

Dhahran, Saudi Arabia

Farooq Sultan