King Fahd University of Petroleum and Minerals

Sharif Iqbal Mitu Sheikh

Rifaqat Hussain

Abdullah Mohammed Saeed Algarni

Abdul Aziz

Forhad Hossain

Abdullah Al-garni

Abdul Rehman Chishti

A dual feed slot-based circularly polarized wideband ultra high frequency (UHF) antenna for a cubic shaped satellite (Cube-Sat) is described. The UHF antenna includes a circuit board, a metallic layer, a hexagonal meandered slot, a capacitor, a first feed horn, and a second feed horn. The circuit board has a front side and a back side separated by a dielectric material. The metallic layer covers the back side of the circuit board. The hexagonal meandered slot symmetrically includes six legs of equal length and six vertexes. The capacitor is switchably connected to the metallic layer. The first feed horn is connected by a first feed line to a first edge of the front side of the circuit board. The second feed horn is connected by a second feed line to a second edge of the front side of the circuit board.

Small dimension UHF antenna for cubic form satellite

Ultra high frequency antenna with variable frequency range

Satellite antenna with metal foil etched film layer

Dual polarized UHF band cubesat antenna

A shared aperture multi-band antenna is described. The antenna includes a dielectric circuit board, a folded dipole microstrip antenna, and a lumped inductor. The folded dipole microstrip antenna is formed on a top side of the dielectric circuit board. The microstrip antenna includes two meander paths. The two meander paths enclose a shared aperture therebetween. The lumped inductor is inserted across a first gap near the third edge. A first pair of parallel metallic patches, a second pair of parallel metallic patches, and a third pair of parallel metallic patches are located on the bottom side. The antenna resonates in a dual band frequency range comprising a first resonance band in a range of 0.4 GHz to 0.6 GHz and a second resonance band in a range of 4.7 GHZ to 5.8 GHz upon application of an input signal at both a first feed port and a second feed port.

Shared aperture folded dipole antenna

An apparatus and a method for detecting insect infestation are described. The apparatus includes a cylindrical capacitive sensor including a first semi-cylindrical electrode plate and a second semi-cylindrical electrode plate, wherein the first semi and second semi-cylindrical electrode plates are configured to wrap around the test tree trunk and a processing circuitry, which is configured to measure a capacitance of the test tree trunk when positioned between the first semi-cylindrical electrode plate and the second semi-cylindrical electrode plate and provide a measured capacitance, compare the measured capacitance of the test tree trunk to a reference capacitance of a reference tree trunk, and determine whether an insect infestation is present in the test tree trunk. The cylindrical capacitive sensor can further include another two types of electrode configurations: two pairs of cylindrical electrode strips and two cylindrical electrode rings, wherein the two pairs of cylindrical electrode strips are further configured to positively charge a first pair of cylindrical electrode strips wherein the two the cylindrical electrode strips are oppositely positioned and negatively charge a second pair of cylindrical electrode strips wherein the two cylindrical electrode strips are oppositely positioned, and the two cylindrical electrode rings is further configured to positively charge a first cylindrical electrode ring and negatively charge a second cylindrical electrode ring.

Low frequency apparatus and method for insect infestation detection

Growing community of inventors

Dhahran, Saudi Arabia

Sharif Iqbal Mitu Sheikh