W E L C O M E

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PLASMA

ANTENNA

TECHNOLOGY2COLLEGE OF ENGINEERING, PERUMON

S U B M I T T E D B Y

NEETHA PONNU

EC 7A

ROLL NO:393COLLEGE OF ENGINEERING, PERUMON

C O N T E N T SPLASMA PHYSICS

COMMON PLASMAS

UNIQUE FEATURES OF PLASMA ANTENNA

WORKING

STEALTH

PULSED PLASMA ANTENNA

ADVANTAGES

DISADVANTAGES

APPLICATIONS

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P L A S M A P H Y S I C S Fourth state of matter

Discovered by WILLIAM CROOKES

Partially ionized gas

Electrons free rather than being bound to atoms

Electrically conductive. So respond to EM field

Plasmas exist only when the gases they are made of is very hot

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ARTIFICIALLY PRODUCED PLASMAS

Those found in plasma displays

inside fluorescent lamps

Rocket exhaust

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T E R R E S T R I A L P L A S M A S

Those found in:-

Lightning

Ionosphere

Elves

Jets

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A S T R O P H Y S I C A L P L A S M A S

Plasmas found in the

Sun

Stars

Interplanetary space

Interstellar space

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UNIQUE CHARACTERISTICSHigher power

Enhanced bandwidth

Reconfiguration and multifunctionality

Lower noice

Perfect reflector

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W O R K I N GPlasma when dense, acts as a conductor

Antenna generates concentration of plasma to form plasma mirror

A central field is located at the focus of mirror which deflects RF beam

Ionized region produced by electronically controlled devices

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Plasma moved by switching device on or off

Reflectors- they become active one at a time

Beams are steered without the need for mechanical motion

SI disc act as lens to form reflector system that enable RF energy to be collimated

When gas is not ionized element ceases to exist

W O R K I N G

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S T E A L T H

New antenna made of plasma

Vanishes when u turn off

Important in battlefield

Impervious to signal jamming

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P U L S E D P L A S M A A N T E N N A

A method and device of energizing a plasma antenna

using power from the discharge of an electro propulsion engine

comprises of a propellant and feed system, a capacitor charging power processing unit and an energy storage capacitor

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energy is released over an electrode gap

resultant ablation products are ionized and accelerated by an electromagnetic force, thereby producing a pulse.

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A D V A N T A G E SReconfiguration

Improved performance

Stealthiness

Good efficiency

Portable, reliable

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D I S A D V A N T A G E S

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complexity of antenna design

equipment for ionisation

noise

A P P L I C A T I O N S

STEERABLE WIRELESS LAN

MESH NETWORKS

DEFENSE APPLICATIONS

WiFi SECURITY

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C O N C L U S I O Nthe plasma antenna R&D project launched the technology

attracted the intrest from diverse areas

potential advantages for antenna design

revolutionised antenna tecnology

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B I B L I O G R A P H Ywww.livescience.com

www.seminar.org

www.wikipedia.com

www.electronics4u.com

www.dailywireless.com

RADIO AND WAVE PROPOGATION-K.D.PRASAD

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T H A N K Y O U

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Q U E R I E S ? ? ?

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