Title :
Analysis of gain enhancement in antenna arrays covered with metamaterial superstrates using transmission line modeling
Author :
Attia, Hussein ; Siddiqui, Omar ; Ramahi, Omar M.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
Reciprocity theorem in conjunction with transmission line analogy and the cavity model is employed to develop a very fast analytical solution for the radiation fields of microstrip antenna arrays covered with magneto-dielectric superstrates. The superstrate is designed using broadside coupled split ring resonator (SRR) inclusions and is placed at approximately one-tenth of a wavelength apart from a 4×1 microstrip patch array operating at 2.2 GHz. Good agreement is obtained between the proposed analytical formulation and full-wave numerical simulations. The proposed formulation requires only 2.5 % of the time acquired by full-wave analysis. A gain increase of about 3.5 dB is achieved after covering the antenna array with the engineered magnetic superstrate.
Keywords :
antenna radiation patterns; metamaterial antennas; microstrip antenna arrays; numerical analysis; resonators; transmission lines; SRR inclusion; broadside coupled split ring resonator; cavity model; frequency 2.2 GHz; full-wave numerical simulation; gain enhancement; magneto-dielectric superstrate; metamaterial superstrate; microstrip antenna array; microstrip patch array; radiation field; reciprocity theorem; transmission line analogy; transmission line modeling; Analytical models; Metamaterials; Microstrip; Microstrip antenna arrays; Microstrip antennas; Power transmission lines;
Conference_Titel :
Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on
Conference_Location :
Spokane, WA
Print_ISBN :
978-1-4244-9562-7
DOI :
10.1109/APS.2011.5996769
