plasma antennas

1. PRESENTED BY
AKSHAY SINGH
PLASMA ANTENNA

2. OUTLINE
• INTRODUCTION
• PLASMA ANTENNA
• WORKING PRINCIPLE
• ADVANTAGES
• DISADVANTAGES
• APPLICATIONS
• CONCLUSION
• REFERENCES

3. PLASMA
• Discovered by Sir William Crookes (1879)
• “Radiant matter”
• Termed “Plasma” by Irving
Langmuir(1928)
• Forth state of matter
• Set of Quasi-Neutral Particles

4. PLASMA FORMATION

5. 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.

6. 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.

7. BLOCK DIAGRAM OF SIMPLE
PLASMA ANTENNA

8. FIGURE OF GAS PLASMA
ANTENNA

9. IONIZED GAS PLASMA
ANTENNA

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

11. 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.

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

13. 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.

14. 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.

15. REFERENCES
• https://en.wikipedia.org/wiki/Plasma_anten
na.
• http://electronicsforu.com/electronicsforu/ci
rcuitarchives/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”.

16. THANK YOU