PLASMA ANTENNA

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 designing antennas.

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PLASMA ANTENNA TECHNOLOGY Antenna is the electrical conductor that radiates radiowaves at transmitter end and collects them at receiver end.

When voltage is applied ,it causes current to flow in the antenna due to which electromagnetic waves are radiated.

Plasma Antenna uses ionized gas as counducting material .

The ionized gas is enclosed in a tube or enclosure.

The gas is ionized only for the time of transmission or reception,

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PLASMA ANTENNA DESIGN

Plasma Antenna contains:

An enclosed chamberComposition capable of forming plasma.At least three energizing points to form electromagnetic contact.At least one energy source to form a conductive path in the plasma.

PLASMA ANTENNA PRINCIPLEWhen supply is given to the tube the gas in the tube gets ionized.When the plasma is highly ionized,it behaves as a conductor because of free ions in it.It generates a high concentration of plasma to form a plasma mirror which reflects incoming beam from central feed.

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 which makes it difficult to track.

Selecta beam, Reflecta beam

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SELECTABEAMDeliver high-speed beam steering.Available in both planar and circular designsSuitable for Wi-Fi that support TDM of multiple channels.Provide excellent interfernce rejection.

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REFLECTA BEAMKey Features of Reflecta

beam :

Operates upto Freqencies of 90GhzDesign to provide high speed selectionAt 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.

High speed beam switching enables spatial time division multiplexing to boost spectral efficiency and throughput.

Compact and lightweight : reduces costs, simplifies installation and minimizes environmental impact.

Maintenance free - auto-aligning with no moving parts and requires no calibration, minimizing total cost.

PSian Plasma antenna up coming Technology is PSiAn Launched in 2010Based on silicon integrated circuits technologyIts product cost does not increase with frequencyFrequncy range -1 to 300GHzAdvantages:-Wide band MultimediaWireless local networksMedical etc

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.

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APPLICATIONSNetwork Equipment Providers and Systems Integrators Network Operators Public Safety NetworksSensing Defense, Space and Homeland Security.

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Microwave Communication Plasma Antenna Provide:-

Ease for realignment of long range directional antennas. Low Cost  for the network owner.

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WiFi-WiMAX Local Access Point Plasma Antennas Provides:-

Directional beamforming at another frequency Powerful dual-band combination provides an efficient and compact ‘single-antenna’ solution for local WiFi Selectable multi-beam

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ADVANTAGES

High gain Low interference Compact and lightweight Widebandwidth Maintenance free Perfect Reflector

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