11427

10503

كارشناسي ارشد

مخابرات

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي برق و كامپيوتر

1395

هفده، 141ص.: مصور

ذاكرحسين فيروزه، محسن مداح علي

ابوالقاسم زيدآبادي نژاد، رضا صفيان

1395/05/24

مهندسي برق و كامپيوتر

ID10503

Design and simulation of a miniaturized patch antenna at 2 4 GHz using metamaterial structures Reza Abed Bijayeh r abed@ec iut ac ir May 21 2016 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Dr Zaker Hossein Firouzeh zhfirouzeh@cc iut ac ir and Dr Mohsen Maddahali maddahali@cc iut ac ir Abstract Antenna miniaturization has received increased interest in antenna and related fields due to the desire for small andversatile antennas in radio communication systems Nowadays increasing demand for multifunctional systems derive morerequirements for small mobile terminals including cell phones handheld portable wireless equipment for internet con nection short and long range communication devices RFIDs radio frequency identification and others Also smallequipment and devices which are used for data transmission and navigation GPS systems require small antennas These applications and continuing growth of wireless devices have persuaded researchers to create smaller and moremultifunctional antennas The small physical size low cost broad bandwidth and good efficiency are desirable features ofan integrated antenna Also the quality factor Q and the radiation loss of the antennas are inversely related to the antennasize Metamaterial based antenna designs were developed in the early 1990s which resulted in a significant size miniatur ization while maintaining a good radiation performance In these antennas the dispersion relation and or the near fieldboundary conditions are manipulated In fact metamaterial antennas opened a way to overcome the restrictive limitation ofsmall antennas In this thesis a patch antenna with a central frequency of 2 4 GHz is designed which has been miniaturized significantlyby using two different metamaterial structures Reactive Impedance Surface RIS and Composite Right Left Hand CRLH structures Three different antennas are proposed Two of them have the same CRLH structure but different numbers offrequency bands One antenna is double banded and the other has four bands The third antenna designed with nine CRLHunit cells has a different performance in comparison with the other antennas Key Words Antenna Miniaturization Patch antenna Reactive impedance surface CRLH

ذاكرحسين فيروزه، محسن مداح علي

ابوالقاسم زيدآبادي نژاد، رضا صفيان