Compact Low-Profile WiMAX-MIMO Antenna with Defected Ground Structure for Disaster Management

This paper presents a novel, compact, and low-profile 2 × 2 multi-input multi-output (MIMO) antenna for WiMAX 802.16a applications which is very useful for disaster communication systems. Proposed WiMAX-MIMO antenna designed on low cost FR4 substrate with the compact size of 32 × 32 mm2 with dielectric constant of 4.4. The defected ground structure perturbed in the form of L-shaped in the ground plane offer a good isolation up to −26 dB for the entire frequency band of 3–14 GHz. The two patches on the top of substrate perpendicular to each other introduced pattern diversity in the radiation pattern. The good impedance bandwidth of 0–14 GHz, high isolation and low correlation coefficient make the proposed design antenna suitable for WiMAX 802.16a applications.