A compactdual-polarizedantenna using slotted patch with broad beam width

摘要

In this article, a broadband dual-polarized microstrip antenna with low profile and compact horizontal size is presented. By using the grid-slotted patch, dual modes can be excited to broaden the operating bandwidth of the proposed antenna. A broad bandwidth of 25(1.4-1.8 GHz) for return loss >10 dB is achieved in our design. Two orthogonal linear polarization waves are excited when two pairs of aperture are utilized to couple the grid-slotted patch. Current distribution varies with frequency which results in a broad and varying beam width. Consequently, a roughly flat gain curve appears in our design. The proposed antenna achieves a low profile of 0.09 lambda(0)(lambda(0)is the free-space wavelength at 1.6 GHz) and a compact horizontal size. A prototype is fabricated and measured to prove the simulation.