The document discusses plasma antennas, which use ionized gas instead of metal conductors. Plasma antennas have advantages over traditional antennas like higher efficiency and enhanced bandwidth. They operate by ionizing a gas to create plasma that can radiate or receive radio waves. However, plasma antennas also have limitations like higher costs and not being suitable for mobile use. The document reviews the basic principles, operation, characteristics, advantages, limitations and applications of plasma antennas.

1. SHRI DADAJI INSTITUTE OF
TECHNOLOGY AND SCIENCE
SEMINAR ON
PLASMA ANTENNA
SUBMITTED TO:
EC DEPARTMENT
SUBMITTED BY:
SHIVRANJAN GITE
EC 6th SEM

2. CONTENTS:-
 INTRODUCTION
 PLASMAANTENNA
 ANTENNA PRINCIPLE
 OPERATION OF PLASMA ANTENNA
 CHARACTERSTICS
 ADVANTAGES
 LIMITATIONS
 APPLICATIONS
 CONCLUSION
 REFERENCE

3. INTRODUCTION
 An antenna is an electrical device which converts electric currents
into radio waves at transmitter and inverse of this operation at
receiver
 A plasma antenna is a radio frequency (RF) antenna based on
plasma elements instead of metal conductors.

4. PLASMA ANTENNA
 It is a tube type structure
 In plasma antenna low Pressured Ionized Gasses are used
 It based on Conductivity of Ionized Gasses
 It Provide Electromagnetic Wave Radiation

5. AN EXAMPLE OF PLASMA ANTENNA

6. ANTENNA PRINCIPLE
 When voltage is applied to an antenna, electric field is
produced
 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

7. OPERATION OF PLASMA ANTENNA
 In an ionized gas plasma antenna, a gas is ionized to create a
plasma.
 Plasma state act as a driven element to radiate radio waves, or
to receive them.
 Alternatively the plasma can be used as a reflector or a lens to
guide and focus radio waves from another source

8. • Solid-state antennas differ in that the plasma is created
from electrons generated by activating thousands of diodes on a
silicon chip.

9. CHARACTERISTICS
 Gas ionizing process can manipulate resistance and when
deionized, the gas has infinite resistance and doesn't interact
with RF radiation.
 Operates up to 90 GHz.
 It use ionized gas as conducting material.
 The gas is ionized only for the time of transmission or
reception.

10. ADVANTAGES
 Higher Efficiency
 Lower Noise
 Low in Weight
 Enhanced Bandwidth
 Higher Power

11. LIMITATIONS
• It can not be used in mobile environment
• Plasma antennas are expensive and hard to manufacture.
 Ionozer increases power consumption .

12. APPLICATIONS
 Military Applications
 Public Safety Networks
 Radar Systems
 High Frequency Applications

13. CONCLUSION
• Plasma antenna is requirment of morden day because it has
many advantages over traditional antenna as we discussed
today.
• This technology is not possible practically but in future it is
practically provided.
• It is more advantageous than other antenna due to ionized gas.

14. REFERENCE
 www.google.co.in
 www.wikipedia.org
 www.slideshare.com
 www.technopdf.com