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Newsletter
Project Name :
Investigation of the Pear-Shaped Metal-Dielectric Antenna using the negative dielectric parameters and matching device
Donor Organization :
GNSF, President Grant for Young Scientists
Budget:
15000 GEL
Grant number :
GNSF/PRES08/7-347
Research Direction :
3 Engineering Sciences, High-Tech Materials
Sub Direction :
3-160 Electrical Engineering
Keyword(s) :
Antenna Design
Description :
The proposed research concerns the investigation of the new type of metal-dielectric antenna with the optimal geometrical shape and size using the user-friendly program package.
The progress in Wireless Communications Systems (WCS) requires development of new components and devices with improved characteristics to meet ever-increasing demands. The most complicated and critical parts of these systems are antennas due to the up-to-date severe and, sometimes, contradictory claims to their geometrical, electrical, directional and compatibility characteristics. Antennas should be well matched with feeder and with free space, and also to possess the wide-band characteristics. At the same time, they are desired to be minimized in size, to be as diminutive as it is possible. Moreover, the antennas should satisfy the present-day claims to ecological and health safety conditions, and minimization of electromagnetic energy radiation. All is especially important for fabrication of portable Personal Communication Systems (PCS).
Near the antenna there is a reactive field. So, the user head is located in the area of high value of EM field. In spite of relatively low frequency and low energy of quantum ( ), which is unable to ionize molecules, the thermal influence of heating of the head tissues can causes a lot of undesirable effects (tiredness, headache and more severe consequences.). In addition, efficiency of such antennas is not high enough because of substantial absorption of emitted energy by user’s body. Since the energy emitted by batteries is not used in efficient way, this also reduces battery’s living time. That is why, research, development, and fabrication of new types of Antenna for PCS is an important technical, compatibility, ecological, and health safety problem.
Proposed project presents further investigation of the project # GNSF/ST06/4-016 “Research of Dielectric Coated Personal Communication Systems (PCS) Antennas to meet modern claims of Electromagnetic Compatibility (EMC) with Achieving Maximal Health Safety for User” funded by Georgian National Science Foundation, especially inversigation of the pear-shape monopole antenna (PSMA) using the negative dielectric coating and matching device. For solving the stated electrodynamical problem the Method of Auxiliary Sources (MAS) is used.
Taking into consideration the aforesaid the objectives of the proposed project are:
• Extension of MAS for investigation of EM characteristics of materials with the negative permitivity and permeability. It means modification of MAS and creation of corresponding program code.
• Study of the PSMA radiation characteristics in case of the negative dielectric coating; choosing of optimal geometrical and EM parameters for fixed frequency range.
• Investigation of PSMA using the matching device. Study of influence of matching device on band-width of operating range.
The scientific and commercial significance of the expected project results consist in the development of up-to-date approach to solve realistic antenna problems. It will also lead to the improvement of competitive user-friendly program package for computer simulation of particular type of antennas being in widespread demand. The project will result in discovering optimal shape and research of characteristics of novel variants of antennas to meet user desires and satisfy requirements of EMC, ecological and health safety
Duration :
01/01/2009 - 31/12/2009
Project Leader :
Tamar Gogua
Project manager :
Project participant(s) :
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