Title :
A defected ground structure for isolation enhancement in a printed MIMO antenna system
Author :
Numan, A.B. ; Sharawi, Mohammad S. ; Steffes, A. ; Aloi, D.N.
Author_Institution :
Electr. Eng. Dept., King Fahd Univ. of Pet. & Miner. (KFUPM), Dhahran, Saudi Arabia
Abstract :
In this work, a novel defected ground structure (DGS) based isolation technique is proposed for printed antennas. The DGS is capable of improving the isolation of a dual band antenna especially for the low bands (800MHz). A 4-shaped MIMO antenna system is used to test the performance of the isolation structure. The proposed method relies on a modified dumbbell shaped DGS to improve the isolation for high band (2440-2980). The primary rectangles of the dumbbell are loaded with a spiral to cover the low band (803-823MHz). The minimum isolation for the low band and high band was approximately 17dB and 9dB respectively. A minimum isolation improvement of 14dB and 4dB was observed for the low band and high band respectively compared to the original MIMO antenna system under test without such a structure.
Keywords :
MIMO communication; microstrip antennas; multifrequency antennas; DGS; defected ground structure; dual band antenna; frequency 800 MHz; frequency 803 MHz to 823 MHz; gain 14 dB; gain 17 dB; gain 4 dB; gain 9 dB; isolation enhancement; isolation structure; isolation technique; printed MIMO antenna system; printed antennas; Antennas; Bandwidth; Couplings; Dual band; MIMO; Spirals;
Conference_Titel :
Antennas and Propagation (EuCAP), 2013 7th European Conference on
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4673-2187-7
Electronic_ISBN :
978-88-907018-1-8
