United College Of Engineering And Research,Allahabad

TECHNICAL PAPER PRESENTATION

ON

PLASMA ANTENNA

BY- SAURABH SINGH EC – 7th SEM

ROLL NO. - 0501013072

PLASMA ANTENNAObjectives of Presentation:

What is Plasma.What is Antenna.Plasma Antenna Technology.How Plasma Antenna Works.Unique Characteristics of Plasma Antenna.Why we use Plasma Antenna.Applications.

What is Plasma?

Sir William Crookes, identified a matter, called plasma, in 1879.

Plasmas are conductive assemblies of charged and neutral particles.

Plasmas carry electrical currents and generate magnetic fields.

What is an Antenna?

Antenna is a device used as transmitter and receiver in signal transmission and receiving.

Both transmitting and receiving antenna must have equal impedance.

Plasma Antenna

Technology It employs ionized gas enclosed in a tube as the conducting element of an antenna.

The gas is ionized only for the time of transmission or reception.

The design allows for extremely short pulses, important to many forms of digital communication and radars.

Plasma AntennaTechnologyIt is compact and dynamically reconfigured

for frequency, direction, bandwidth, gain and beam width.

This technology enable to design antenna that are efficient, low in weight and smaller in size .

Plasma antenna technology employs ionized gas enclosed in a tube as a conducting element of an antenna.

When the Gas is ionized to a plasma state -then it becomes conductive, allowing radio frequency (RF) signals to be transmitted or received.

How Does Plasma Antenna Works?

How Does Plasma Antenna Works?In order for plasma to have significant effect on an electromagnetic wave, the electronic density must be increased by several orders of magnitude.

When the gas is not ionized or a plasma antenna is turned off - it is transparent and allowing other adjacent antennas to transmit or receive without interference. Plasma Parabolic Reflector

How Does Plasma Antenna Works? A plasma antenna

generates localized concentrations of plasma to form a plasma mirror which deflects an RF beam.

The plasma can be freely moved to desired geometry of the reflector by plasma diodes.

This enables the beam to be steered quickly without the need for mechanical motion .

In some realizations, the silicon disc (i.e. Si wafer) act as a cylindrical lens, to form a lens/reflector system that enables the RF energy to be collimated.

This prototype plasma antenna is stealthy, versatile, and jam-resistant.

How Does Plasma Antenna Works?

Unique Characteristics of a

Plasma Antenna Does not interact with RF radiation.

Deionizing the gas antenna will not backscatter radar waves (providing stealth).

Eliminating the ringing associated with traditional metal elements.

Reduces computer signal processing requirements.

Unique Characteristics of a Plasma Antenna

Reduced radar cross section provides stealth due to the non-metallic elements.

Changes in the ion density can result in instantaneous changes in bandwidth over wide dynamic ranges.

After the gas is ionized, the plasma antenna has virtually no noise floor.

Unique Characteristics of a Plasma Antenna

A single dynamic antenna structure can use time multiplexing so that many RF subsystems can share one antenna resource.

Our plasma antenna can transmit and receive from the same aperture provided the frequencies are widely separated.

Why we Use Plasma Antenna?Plasma devices are fully steerable.

Are a low cost replacement for both mechanically steered antennas.

No antenna ringing provides an improved signal to noise ratio comparison to traditional antennas.

A airborne Plasma antenna provides stealth technology to it.

Why we Use Plasma Antenna?

Plasma Antennas leads the world in developing low cost plas76 antennas across the band 1 GHz to 300 GHz.

A circular scan can be performed electronically with no moving parts at a higher speed than traditional mechanical antenna structures.

Plasma Antenna

Application of Plasma Antenna.MILITARY APPLICATIONS:

Shipboard/submarine antenna replacements.

Unmanned air vehicle sensor antennas.

IFF land-based vehicle antennas. Stealth aircraft antenna

replacements.

Application of Plasma Antenna

COMMERCIAL APPLICATIONS:

Telemetry & broad-band communications.

Ground penetrating radar. Navigation. Weather radar and wind shear

detection. Collision avoidance . High-speed data communication.

QUESTIONS ?