PRESENTED BY

AKSHAY SINGH

PLASMA ANTENNA

OUTLINE• INTRODUCTION

• PLASMA ANTENNA

• WORKING PRINCIPLE

• ADVANTAGES

• DISADVANTAGES

• APPLICATIONS

• CONCLUSION

• REFERENCES

PLASMA

• Discovered by Sir William Crookes (1879)• “Radiant matter”• Termed “Plasma” by  Irving

Langmuir(1928)• Forth state of matter• Set of Quasi-Neutral Particles

PLASMA FORMATION

PLASMA ANTENNA• Plasma is used instead of metal as antenna

element.• They can be used for both Transmission and

Reception.• Two Types - Gas And Solid State Plasma

Antenna• More energy is required to ionize the gases or

to make the silicon chips release electrons.

WORKING PRINCIPLE

• Plasma antenna consists of a tube filled with a gas.

• When supply is given to the tube, the gas inside it gets ionized to plasma.

• When plasma is highly energized, it behaves as a conductor.

• Emits Electromagentic waves when appropriate RF signals are applied.

BLOCK DIAGRAM OF SIMPLE PLASMA ANTENNA

FIGURE OF GAS PLASMA ANTENNA

IONIZED GAS PLASMA ANTENNA

COMPARISON OF RADIATION PATTERN FROM PLASMA (BLUE) AND METAL (RED)

ADVANTAGES• Lighter than conventional antennas.• Less maintenance is required.• Eliminates ringing effect.• High operable frequency.• Higher efficiency.• Difficult to detect by radar.• Extremely short pulse can be generated.

DISADVANTAGES

• Higher power consumption.• Plasma volumes must be stable.• High frequency signals do not penetrate the

walls.

APPLICATIONS

• Stealth Aircraft Antenna.• High speed data communication.• Broadband Jamming• Detection and tracking of missiles.• Can be used easily in war.• Unmanned air vehicle sensor antennas.

CONCLUSION• Plasma antenna works similar as traditional

antenna does with plasma replacing the metal conductor of traditional antenna.

• Invisible to radar and can release short pulses of signals.

• It can pave way towards faster wireless internet.

REFERENCES

• https://en.wikipedia.org/wiki/Plasma_antenna.

• http://electronicsforu.com/electronicsforu/circuitarchives/view_article.asp.

• Kraus J.D., “Antennas for all applications”, second edition, “Tata McGraw-Hill 1988”.

• Balanis C.A. “Antenna theory analysis and design” second edition, “John Wiley &sons, Inc 1997”.

THANK YOU