A Compact Dual-Polarized Patch Antenna with L-Shaped Short Pins

A compact dual-polarized patch antenna with L-shaped short pins is proposed. The proposed antenna is configured with two substrates of 1.524 mm and 1.5 mm thickness, stacked by two prepregs of 2×95 μm thickness. The top layer is a rectangle patch with a T-shaped slot, two T-shaped branches, and two L-shaped short pins, which are shorted to the bottom layer of the metallic ground with the same size pins, and is fed by two vertical coaxial probes. Two L-shaped short pins achieve high isolation between the two ports by introducing three rectangular slots etched on the ground, two L-shaped strips in the middle layer connected with the short pins, and two T-shaped branches. Moreover, a wider bandwidth is realized by two L-shaped strips. A prototype of 0.16\lambda_{0} \times 0.16\lambda_{0} \times 0.04\lambda_{0} has been fabricated, where \lambda_{0} is the free-space wavelength at the center frequency. The measured isolation of better than 35 dB is obtained over the operating bandwidth of 3.46 - 3.58 GHz. The experimental results agree well with the simulation results, making it a competitive candidate for 5G applications in the indoor and terminal scene.