Design of wide‐band dual‐polarized antennas with plate for improving gain characteristics

In this article, a wideband dual‐polarized antenna that can be used in the 1.7‐3.7 GHz band is proposed. The proposed antenna is a dual‐polarized antenna with a plate having a parasitic elements and it improves the gain characteristics in wide‐band. In general, an antenna with a reflection plate is difficult to have a constant gain characteristic in the wide‐band, because the electrical distance between the radiation elements and the reflection plate is variable for the bandwidth. In this article, a parasitic element is assigned to the front side of the radiation element to improve the gain of the band in which the characteristic is degraded. The proposed antenna has the VSWR < 2:1 in the band of 1540‐3795 MHz (84.5% of center frequency) and has a gain of 7.92 dBi or more at the measured frequency.