There have been many proposed applications for clusters of small Unmanned Aerial Vehicles (UAVs). Some of these applications, such as air antenna bases, Synthetic Aperture Radar and video surveillance, can generate large quantities of data which must be transmitted to a base station quickly. UAV size limitations often prevent the use of large, highly directive antennas in this link with the airborne antenna bases station. This paper proposes the solution of forming an array from several UAVs and applies antenna array theory to analyze its performance. An example is given where tungsten alloy is used to achieve high directivity even in the presence of element position errors. Tungsten alloy is the best material to make airborne antenna bases.



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Tungsten silicide also named tungsten poly, poly tungsten. For using WSi2/n+ poly-si instead of n+ poly-si gate and interconnection,the multiply/accumulation time has failed from 125ns to 99ns.

1000A tungsten silicide film has been deposited on 1500A .polycrystalline silicon doped by POCL3.The.composite film was annealed at 1000C in N2 atomsphere.The sheet resistance is about 3.7ohm.per.square,calculated tungsten silicide resistivity is 41.4 uohm.cm. Tungsten silicide has been used in CMOS 12X12 bit multiplier,device feature size is Sum.


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A tungsten alloy gyroscope rotor is a device for measuring or maintaining orientation, based on the principles of angular momentum. A mechanical they are essentially a spinning wheel or disk whose axle is free to take any orientation. This orientation changes much less in response to a given external torque than it would without the large angular momentum associated with the gyroscope's high rate of spin. Since external torque is minimized by mounting the device in gimbals, its orientation remains nearly fixed, regardless of any motion of the platform on which it is mounted. Solid state gyroscopes also exist.

Applications of tungsten alloy gyroscopes rotors include navigation (INS) when magnetic compasses do not work (as in the Hubble telescope) or are not precise enough (as in ICBMs) or for the stabilization of flying vehicles like Radio-controlled helicopters or UAVs. Due to higher precision, tungsten alloy gyroscope rotors are also used to maintain direction in tunnel mining.

Gyroscope rotors exhibit a number of behaviors including precession and notations. Tungsten heavy alloy gyroscope rotors can be used to construct gyrocompasses which complement or replace magnetic compasses (in ships, aircraft and spacecraft, vehicles in general), to assist in stability (bicycle, Hubble Space Telescope, ships, vehicles in general) or be used as part of an inertial guidance system. It effects are used in toys like tops, boomerangs, yo-yos, and Powerball's. Many other rotating devices, such as flywheels, behave gyroscopically although the gyroscopic effect is not used.

Tungsten alloy gyroscope rotors in operation have freedom of movement in all three axes. The tungsten alloy gyroscope rotors will maintain its spin axis direction regardless of the orientation of the outer frame. With its perfect properties, tungsten alloy is the perfect material for gyroscope rotors.



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The popularity of adding tungsten alloy flywheel weights has increased dramatically. More and more riders discover that they can go faster for longer with the smooth power delivery, better traction, and reduced stalling that tungsten alloy flywheel weights provide. Adding a tungsten alloy flywheel weight will increase the rotating mass, or inertia, of the motor.

The result is an engine that is a little slower to rev, has more controllable power delivery and less hard hitting power, a more usable low to mid-range, and is less likely to stall at slow speeds or with the rear brake. What you will feel is better traction when it is slippery or hard pack, a torquier and broader power band, the top endpower on many bikes will be improved with less tendency to lose RPM's when climbing or hitting obstacles. The easier to control power will help you conserve your strength and energy, plus many bikes start easier with the added weight. Most can be installed in less than a half hour without removing the stock flywheel from the engine. Tungsten alloy flywheel weights are machined on computer operated lathes for the ultimate in balance, trueness and strength.



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