A Transparent Wideband Dual-Polarized Antenna for Sub-6 GHz Application

In this letter, a novel transparent dual-polarized antenna has been developed for sub-6 GHz application. The proposed antenna composed of transparent conductive mesh and polycarbonates material is of optical transparency. Based on characteristic mode analysis, the proximity-coupling fed driven patch operates in TM
₁₀
/TM
₀₁
mode. By stacking the parasitic patch and strips above the driven patch with a cross slot, three resonances are generated. With the T-shaped slots on the parasitic patch, the impedance matching at low frequencies is improved. By etching the slots on the ground and cutting off the corners of the driven patch, good port isolation and stable in-band gain are achieved. The prototype of proposed antenna is fabricated. The measured results show that the proposed antenna exhibits a wide impedance band of 2.76–4.13 GHz with a fractional bandwidth of 39.8%, a good isolation better than 22 dB, a low cross polarization ratio better than 20 dB within the operating band.