Plasma ANTENNA ppt

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Plasma Antenna

Aijaz Ahmad

433/11

ECE 7th

Sem.

NIT SRINAGAR

Contents: What is plasma? Plasma antenna Working of plasma antenna Classification of plasma antenna Characteristics/features Advantages Limitations Applications Development progress Conclusion

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WHAT IS PLASMA?

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Plasma is similar to gas in which certain portion of particles are ionized.

Plasma is formed when that much of energy is applied to gas at which its particles ionize.

Plasma is,therefore, considered as fourth state of matter.

Because of ionized particles/carriers ,plasma is conductive.

Traditional Antenna: An antenna is a device used for the purpose of reception as well

as transmission of electromagnetic waves.

Physically, an antenna is a collection of one or more conductors called as its elements.

It is sized to emit radiations at one or more selected

frequencies.

Shape and size of conventional

antenna depends upon the area

of application

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Plasma Antenna

Plasma antennas are radio frequency antennas that employ plasma as the guiding medium for electro-magnetic radiations.

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When the Gas is ionized to aplasma state then it becomesconductive, allowing radiofrequency (RF) signals to betransmitted or received.

CLASSIFICATION OF PLASMA ANTENNAS

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PLASMA ANTENNA

GAS PLASMA

ANTENNA

SOLID STATE PLASMA

ANTENNA [ PSiAn ]

Nature of plasma

A gas is ionized to create

a plasma

Plasma is formed due to

cloud of electrons

Frequency range only upto 90GHz 1-300GHz

Size Large Compact

How Does Gas Plasma Antenna Works?

When supply is given, gas gets ionized toplasma.

Plasma is energized.

Behaves as a conductor.

Generation of localized plasma.

Plasma acts as a mirror.

Reflects the beam.

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Generation of Signals from Plasma Column.

Working of PSiAn Antenna:

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Employs thousands of diodes on a

silicon chip.

Produces electron clouds when

charged.

These act as mirrors and reflect

beam.

Uses beam forming technology.

Used for high frequencies.

Smaller in size.

Cheaper compared to gas plasma

antennas.

Traditional antenna vs Plasma antenna: Traditional antennas are bulkier and of large size as

compared to plasma antennas.

Traditional antennas work at lower frequencies whereas plasma antennas at higher.

Traditional antennas have ringing effect whereas plasma antennas don’t have.

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Features: Higher power.

Higher efficiency.

Enhanced bandwith.

Perfect reflector.

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ADVANTAGES

Lighter than conventional antennas.

Compact and so portable.

Maintenance-free.

Invisible to radar.

Dynamically reconfigurable.

Capable of transmitting signals at fast speed.

Energized and de-energized in seconds.

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LIMITATIONS

Higher power consumption.

Plasma volumes must be stable and repeatable.

High frequency signals do not penetrate the walls.

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Applications:Military sector .

Electronic warfare.

Submarines/ships.

Wireless internet.

Radio and TV broadcasting.

Defense, Space and Homeland Security.

Space wave communication.

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DEVELOPMENT PROGRESS

Growing need for speed of communication n/w along with data handling capacity are the major forces helping to explore new ways of transmission and reception.

It is expected that if PSiAn can be used for trans-mission purpose the data transmission rate would go upto 7 Gbps--------Wi-Gig.

Car anti-collision radar system.

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Conclusion….. Plasma antenna works similar as traditional antenna

does with plasma replacing the metal conductor of traditional antenna.

Because of plasma as conducting material,it offers some advantages over normal antenna.

Invisible to radar and can release short pulses of signals,

It can pave way towards faster wireless internet.

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References; M. Moisan and Z. J. Zakrzewski, “Plasma sources based on the propagation of

electromagnetic surface waves,”

http://electronicsforu.com/electronicsforu/circuitarchives.plasma antenna/view_article.asp.

Theodore Anderson, 2011. Plasma Antennas. Artech House Papers from Conference Proceedings.

Alex Anderson, E. P. Pradeep, Experimental and theoretical results with plasma antennas," IEEE Transactions on Plasma Science,

http://www.ukessays.com/essays/information-technology/advantages-of-the-plasma-antenna-information-technology-essay.php.

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THANK YOU

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