introduction to plasma antenna ppt
TRANSCRIPT
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