A compact two element MIMO antenna system for pattern and polarization diversity

Abstract

In this paper, a compact two-element Multiple Input Multiple Output (MIMO) antenna system having simultaneous pattern and polarization diversity (linear / circular) in upper WLAN application band is proposed. The designed antenna system consists of a chamfered edge offset fed square patch antenna providing circular polarization (CP) in broadside direction and an adjacent printed dipole antenna having linearly polarized (LP) end-fire radiation. So, pattern diversity and the polarization diversity (LP/CP type) are achieved simultaneously with good isolation, without the requirement of any separate decoupling mechanism. The overall antenna footprint is 0.54 λ0 × 0.63 λ0, where λ0 is the free space wavelength at 5.66 GHz. The measured results on a fabricated prototype of the proposed antenna match reasonably well with the full-wave simulation results.