Study of antenna structures with small dimensions at 5.8 GHz ISM Band
Typ
Examensarbete för masterexamen
Master Thesis
Master Thesis
Program
Publicerad
2004
Författare
Rafique, Raihan
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
In recent days, the microstrip antenna is getting more and more attention because of its small dimension, negligible weight, ease of fabrication and option to integrate with active circuits and most of all low cost to produce. The other features those the microstrip antennas offer are ease of fabrication upon the circuit board, can be made with dimension smaller than half wavelength and wide bandwidth can be found. That is why nowadays for any industry related to antenna designing and development feels interested with microstrip antenna for its products. Most components or systems need the microstrip antenna to work for a small range (10meter -1000meter). Wider beamwidth is desirable for such a small range of operation. Here in this thesis, studies are made upon aperture coupled circularly polarized microstrip antenna. Here antenna parameters and radiation pattern are studied to find out the relationship in between them. The study is done on antenna parameters such as excitation of antenna, groundplane size and shape, patch size and shape, and influence of parasitic; based on previous studied and measuring the radiation patterns with different antenna parameters. Simulations are also done to predict the radiation pattern. Several solutions are found to get wider beamwidth and better performance of microstrip antennas. The corner truncated antenna is found the most attractive solution to get wider beamwidth, because it is easy to design and very little modification is needed while implementing this in an ordinary patch antenna.
Beskrivning
Ämne/nyckelord
Elektroteknik och elektronik , Electrical Engineering, Electronic Engineering, Information Engineering