20-12-2012, 02:43 PM
PLASMA ANTENNA TECHNOLOGY
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INTRODUCTION :
WHAT IS PLASMA ? -
An ordinary matter found by Sir William Crookes a fourth state of matter, now known as plasma. - Plasmas are conductive assemblies of charged and neutral particles. - Plasmas carry electrical currents and generate magnetic fields. - Types of Plasma are:- Warm Plasma Cold Plasma -Cold Plasma is used for antenna applications. 1
PLASMA ANTENNA TECHNOLOGY :
Operates up to 90 GHz. - It use ionized gas as counducting material . - The gas is ionized only for the time of transmission or reception. -The design allows for extremely short pulses, important to many forms of digital communication and radars. -Predicted performance:- Beam Positions= 16 Gain= 14dB Switching speed= 2 micro sec - Low weight and smaller in size 2
UNIQUE FEATURE OF PLASMA ANTENNA :
One fundamental distinguishing feature of a plasma antenna is that the gas ionizing process. A second fundamental distinguishing feature is that after sending a pulse the plasma antenna can be deionized. Selectable Multi beam. 3
SelectaBeam :
Key Features of Slectabeam:- Based on Beam forming tecnology. Avoid the need of alignment and realignment of fixed point to point links. Same Benifites as that of Phased array antenna. 4
ReflectaBeam :
Key Features of Reflectabeam:- Operates upto Freqencies of 90Ghz Design to provide high speed selection At High Fequencies Applications it also include radar sensors and monitering systems
Advantages of Selectabeam and Reflectabeam :
High directional gain: concentrates RF power to increase link budget, dramatically enhancing network coverage and capacity. Low sidelobes reduce interference, enabling improved frequency re-use and substantially higher utilization. Wide bandwidth supports simultaneous multi-band or UWB operation from a single compact antenna.
TRADITIONAL ANTENNA VS PLASMA ANTENNA :
Unlike simple directional antennas, Plasma Antennas’ selecta-beam avoiding the need for manual or mechanical alignment and realignment of fixed point-to-point communication links. -Plasma Antennas’ selectable-beam antennas provide similar advantages to phased array antennas but at a fraction of the cost, together with much wider bandwidth of operation. VS 9
APPLICATIONS :
Network Equipment Providers and Systems Integrators Network Operators Public Safety Networks Sensing Defense, Space and Homeland Security. 10
Microwave Communication :
Plasma Antenna Provide:- -Ease for realignment of long range directional antennas. -Low Cost for the network owner. 11
WiFi-WiMAX Local Access Point :
Plasma Antennas Provides:- -Selectable multi-beam -Directional beamforming at another frequency -Powerful dual-band combination provides an efficient and compact ‘single-antenna’ solution for local WiFi 12