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1. Introduction.
2. What is plasma?
3. What is plasma antenna?
4. How does Plasma antenna work?
5. Working principle.
6. P...
 The term plasma antenna has been applied to a
wide variety of antenna concepts.
 In the vast majority of approaches, th...
 A plasma is an
ionized gas.
 A plasma is a very
good conductor of
electricity and is
affected by
magnetic fields.
 Pla...
SOLID LIQUID GAS PLASMA
Tightly packed, in
a regular pattern
Vibrate, but do
not move from
place to place
Close together
w...
1. Flames
9/25/2015 6Fig.3
2. Lightning
9/25/2015 7
3. Aurora (Northern Lights)
9/25/2015 8
The Sun is an example of a star in its plasma
state
9/25/2015 9
Fig.6
 A plasma antenna is a type of radio
antenna currently in development in
which plasma is used instead of the metal elemen...
9/25/2015 11
Fig.7
 A plasma might also be generated
from a gas filled tube containing
a noble gas like Neon or Argon.
 Using of tube requi...
9/25/2015 13
• Operates at high frequency.
• Have no ringing effect.
• No Ohmic loss.
• Operates at lower frequency.
• Hav...
 When supply is given to the tube, the gas
inside it gets ionized to plasma.
 When plasma is highly energized, it
behave...
9/25/2015 15
Experimental setup Fig.11
9/25/2015 16
View of plasma antenna Fig.12
 When voltage applied to an antenna, electric
field is applied.
 It causes current to flow in antenna.
 Due to current ...
9/25/2015 18
Electric and magnetic field produced by an antenna Fig.13
9/25/2015 19Fig.14
9/25/2015 20Comparison Fig.15
9/25/2015 21
DUPLEXER
LNA
AUDIO
FILTER
AUDIO
AMPLIFIER
RF AMP.
AUDIO
FILTER AUDIO
AMPLIFIER MIC
PLASMAANTENNA
LOUD SPEAKER...
 Shipboard/submarine
antenna replacements.
 Unmanned air vehicle
sensor antennas.
 Land- based vehicle
antennas.
 Stea...
 Telemetry &broad-
band communications.
 Ground penetrating
radar.
 Navigation.
 Weather radar and
wind shear detectio...
 The length of an ionized filament can be
change rapidly, thereby ‘returning’ the
antenna to a new frequency.
 The anten...
 Plasma volumes must be stable and
repeatable. when a gas is ionized, not all
100% of gas will ionize to become plasma.
...
 The future of high-frequency, high-speed
wireless communications could very well be
plasma antennas capable of transmitt...
 The plasma antenna works according to the same
principles and physics laws as the normal
antenna, with plasma replacing ...
[1]. Plasma Antennas – G.G. Borg et. Al., Phys.
Plasmas 7, 2198, (2000).; I.
Alexeff et. Al., IEEE Trans. Plasma Sci., vol...
9/25/2015 29
Plasma antenna
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Plasma antenna

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Plasma antenna seminar For under graduate

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Plasma antenna

  1. 1. 1. Introduction. 2. What is plasma? 3. What is plasma antenna? 4. How does Plasma antenna work? 5. Working principle. 6. Pros and Cons. 7. Scope. 8. Conclusion. 9/25/2015 2
  2. 2.  The term plasma antenna has been applied to a wide variety of antenna concepts.  In the vast majority of approaches, the plasma, or ionized volume, simply replaces a solid conductor.  A highly ionized plasma is essentially a good conductor, and therefore plasma filaments can serve as transmission line elements for guiding waves, or antenna surfaces for radiation.  The concept is not new. A patent entitled “Aerial Conductor for Wireless Signaling and Other Purposes” was awarded to J. Hettinger in 1919. 9/25/2015 3
  3. 3.  A plasma is an ionized gas.  A plasma is a very good conductor of electricity and is affected by magnetic fields.  Plasmas, like gases have an indefinite shape and an indefinite volume. 9/25/2015 4 Fig.1
  4. 4. SOLID LIQUID GAS PLASMA Tightly packed, in a regular pattern Vibrate, but do not move from place to place Close together with no regular arrangement. Vibrate, move about, and slide past each other Well separated with no regular arrangement. Vibrate and move freely at high speeds Has no definite volume or shape and is composed of electrical charged particles 9/25/2015 5 Fig.2
  5. 5. 1. Flames 9/25/2015 6Fig.3
  6. 6. 2. Lightning 9/25/2015 7
  7. 7. 3. Aurora (Northern Lights) 9/25/2015 8
  8. 8. The Sun is an example of a star in its plasma state 9/25/2015 9 Fig.6
  9. 9.  A plasma antenna is a type of radio antenna currently in development in which plasma is used instead of the metal elements of a traditional antenna.  Plasma antenna employs ionized gas enclosed in a tube as the conducting element of an antenna.  Plasma or ionized volume, simply replaces a solid conductors.  A highly ionized plasma is a good conductors, therefore plasma filament can serve as transmission line elements for guiding waves.  A ionized volume can take a variety of forms. 9/25/2015 10
  10. 10. 9/25/2015 11 Fig.7
  11. 11.  A plasma might also be generated from a gas filled tube containing a noble gas like Neon or Argon.  Using of tube require less energy to excite and maintain the plasma state, because the gas is pure and the pressure of the tube prevents dissipation.  The use of a tube required that it must be protected from the environment ,which increases the antenna weight and volume and make the antenna less durables. 9/25/2015 12 Plasma antenna Fig.8
  12. 12. 9/25/2015 13 • Operates at high frequency. • Have no ringing effect. • No Ohmic loss. • Operates at lower frequency. • Have ringing effect. • Ohmic loss is high. TRADITIONAL ANTENNA fig.9 PLASMA ANTENNA Fig.10
  13. 13.  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.  Antenna generates a localized concentration of plasma to form a plasma mirror that deflects RF beam launched from a central feed located at focus of mirror. 9/25/2015 14
  14. 14. 9/25/2015 15 Experimental setup Fig.11
  15. 15. 9/25/2015 16 View of plasma antenna Fig.12
  16. 16.  When voltage applied to an antenna, electric field is applied.  It causes current to flow in antenna.  Due to current flow ,magnetic field is produced.  These two fields are emitted from an antenna and propagate through space over very long distance. 9/25/2015 17
  17. 17. 9/25/2015 18 Electric and magnetic field produced by an antenna Fig.13
  18. 18. 9/25/2015 19Fig.14
  19. 19. 9/25/2015 20Comparison Fig.15
  20. 20. 9/25/2015 21 DUPLEXER LNA AUDIO FILTER AUDIO AMPLIFIER RF AMP. AUDIO FILTER AUDIO AMPLIFIER MIC PLASMAANTENNA LOUD SPEAKER Block Diagram
  21. 21.  Shipboard/submarine antenna replacements.  Unmanned air vehicle sensor antennas.  Land- based vehicle antennas.  Stealth aircraft antenna replacement. 9/25/2015 22Fig.16
  22. 22.  Telemetry &broad- band communications.  Ground penetrating radar.  Navigation.  Weather radar and wind shear detection.  Collision avoidance.  High speed data communication. 9/25/2015 23Fig.17
  23. 23.  The length of an ionized filament can be change rapidly, thereby ‘returning’ the antenna to a new frequency.  The antenna can be ‘turned off’ to make it electrically invisible. This reduce scattering and eliminating coupling, interference with other nearby antenna.  High gain.  Wide band width.  Compact and light weight.  Maintenance free.  It can operate up to 20GHZ. 9/25/2015 24
  24. 24.  Plasma volumes must be stable and repeatable. when a gas is ionized, not all 100% of gas will ionize to become plasma.  The ionizer increases power consumption, more energy is required to ionize the gases or to make the silicon chips release electrons. Therefore, plasma antennas actually use more power than normal antennas. 9/25/2015 25
  25. 25.  The future of high-frequency, high-speed wireless communications could very well be plasma antennas capable of transmitting focus radio waves that would quickly dissipate using conventional antennas. Thus, plasma antennas might be able to revolutionize not just high- speed wireless communications.  Higher frequencies mean shorter wavelengths and hence smaller antennas. The antenna actually becomes cheaper with the smaller size.  Plasma antenna to be used for next generation Wi-Gig (its version 1.0 was announced in December 2009) that can reach up to 7 Gbps bandwidth over frequencies up to 60 GHz. 9/25/2015 26
  26. 26.  The plasma antenna works according to the same principles and physics laws as the normal antenna, with plasma replacing the metal conductors of the normal antenna.  But because the conducting material used is plasma, it affords some advantages over a normal antenna.  The most notable advantage of the plasma antenna is the fact that it is practically invisible to radar and can release short pulses of signals.  Therefore, the military US is currently racing to implement the plasma antenna into their exciting systems. 9/25/2015 27
  27. 27. [1]. Plasma Antennas – G.G. Borg et. Al., Phys. Plasmas 7, 2198, (2000).; I. Alexeff et. Al., IEEE Trans. Plasma Sci., vol. 34, no. 2, pp 166-172, April 2006; Igor Alexeff et. Al., Phys. Plasmas 15, 1, 2008. [2]. Plasma Lenses - P. Linardakis, Borg., G. and Martin, N. Electron. Lett. 42, 444 (2006). [3]. Plasma Frequency Selective Surfaces – I. Alexeff et al., IEEE Trans. Plasma Sci., vol. 35, no. 2, pp 407-415, April 2007. 9/25/2015 28
  28. 28. 9/25/2015 29

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