Abstract
A dual-polarized patch antenna array is proposed in this paper. The antenna is integrated in the module by the HTCC technology. The array element is a double-layer patch antenna with an air cavity. The air cavity reduces the equivalent relative dielectric constant of the substrate, and effectively extends the impedance bandwidth of the antenna. The proposed dual-polarized antenna array element achieves a wide fractional bandwidth (18.1%) and a port isolation over 16dB in the operating frequency band.
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