The document describes a plasma antenna. It begins with an introduction to plasma, explaining that plasma is ionized gas that responds to electromagnetic fields. It then discusses plasma antennas, noting that they use plasma instead of metal for conduction and can be used for both transmission and reception. The document goes on to cover the features, working principle, advantages, disadvantages, applications, and future scope of plasma antennas. It concludes by stating that plasma antennas work similarly to traditional antennas but with plasma replacing the metal conductor, offering advantages like invisibility to radar and ability to transmit short pulses.

1. Yeshwantrao Chavan College of Engineering
Department of Electronics & Telecommunication Engineering
Plasma Antenna
Presented By
Name of Student:- SAHIL KEDAR
Roll No.:- B-169
Section:- B

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INDEX
1. Introduction to Plasma
2. Features
3. Working Principle Of Plasma Antenna
4. Advantages of Plasma Antenna
5. Disadvantages of Plasma Antenna
6. Applications of Plasma Antenna
7. Future Scope of Plasma Antenna
8. Conclusion of Plasma Antenna
9. References

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Introduction to Plasma
 It is a gas in which certain portion of particles are ionized.It
responds strongly to electromagnetic fields.
Plasma is similar to gas in which certain portion of particles are
ionized.
Plasma is formed when that much of energy is applied to gas at
which its particles ionize.
Plasma is, therefore, considered as fourth state of matter.
 Because of ionized particles/carriers ,plasma is conductive.

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Plasma Antennas
Plasma Antennas is a type of radio antenna
currently under development.
Plasma is used instead of metal for conduction.
They can be used for both transmission and
reception.

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Features
Ability to focus a single beam.
Communicate signals in very short pulse.
Configurable for frequency, bandwidth, gain, length of plasma column and
radius of glass tube.
Transmit and receive for same apertures if the frequencies are widely
separated.
Gas ionizing process can manipulate resistance and when deionised, the
gas has infinite resistance and doesn’t interact with RF radiation.
After sending pulse , it can be deionised.
 It can operate up to 90 GHz.

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Electric and Magnetic Field produced by the Antenna

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Working Principle Of Plasma Antenna
A plasma antenna generates localized concentrations of plasma to form a plasma mirror which
deflects an RF beam launched from a central feed located at the focus of the mirror.
An ionized region, or solid state plasma, can be generated in silicon using electronically controlled
devices (plasma diodes) that are positioned between closely spaced metalized surfaces which
constrain the beam.
The plasma can be freely moved by switching groups of plasma diodes on and off that follow the
desired geometry of the reflector.
The resulting pattern forms a rosette of overlapping reflectors only one of which is active at any
time.
This enables the beam to be steered quickly without the need for mechanical motion.
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 the mirror.
When plasma jet enters into the spiral field, signals are emitted. The spiral is localized concentration
of plasma. These spirals behave as plasma mirrors which help in transmission of RF signals.

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Working Principle Of Plasma Antenna

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Advantages of Plasma Antenna
 Lighter than conventional antennas.
Compact and so portable.
 Maintenance-free.
Invisible to radar.
Dynamically reconfigurable.
Capable of transmitting signals at fast speed.
Energized and de-energized in seconds.
Plasma posses a high level of conductivity.
A plasma antenna is much less susceptible to electrical damage and can often be repaired
much faster if some event does occur to temporary interfere with its function.

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Disadvantages of Plasma Antenna
 Higher power consumption.
 Plasma volumes must be stable and
repeatable.
 High frequency signals do not
penetrate the walls.

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Applications of Plasma Antenna
Electronic warfare.
Submarines/ships.
Wireless internet.
Radio and TV broadcasting.
Defense, Space and Homeland Security.
Space wave communication.
Military applications for its stealth, weight and easily
reconfiguration.
Unmanned air vehicle sensor antennas.
Detection and tracking of ballistic missiles.
Telemetry.
Broad-band communications.
Ground penetrating radar.

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Future Scope of Plasma Antenna
Growing need for speed of communication
along with data handling capacity are the
major forces helping to explore new ways of
transmission and reception.
It is expected that if Plasma Antenna can be
used for trans- mission purpose the data
transmission rate would go up to 7 Gbps Wi-
Gigabit router.
Car anti-collision radar system.

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Conclusion of Plasma Antenna
 Plasma antenna works similar as traditional antenna does with
plasma replacing the metal conductor of traditional antenna.
Because of plasma as conducting material , it offers some
advantages over normal antenna.
Invisible to radar and can release short pulses of signals.
It can pave way towards faster wireless internet.
It is more advantageous more than other antenna due to ionized
gas.

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References
 M. Moisan and Z. J. Zakrzewski, “Plasma sources based on the propagation of
electromagnetic surface waves,”
http://electronicsforu.com/electronicsforu/circuitarchives.plasma
antenna/view_article.asp.
Theodore Anderson, 2011. Plasma Antennas. Artech House Papers from Conference
Proceedings.
 Alex Anderson, E. P. Pradeep, Experimental and theoretical results with plasma
antennas," IEEE Transactions on Plasma Science,
http://www.ukessays.com/essays/information-technology/advantages-of-the-plasma-
antenna-information-technology-essay.php.

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Plasma Antenna
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