A Series-Fed Slant-Polarized Microstrip Patch Antenna Array
Fu‐Chang Chen, Yu-Zhong Liang, Wen‐Feng Zeng, Kai‐Ran Xiang
Abstract
This communication implements a series-fed microstrip patch antenna with slant polarization. A 45° inclined cross-shaped dual-polarized microstrip patch antenna array was investigated. The radiating elements are interconnected with conductive strips to minimize the influence of the out-of-phase phase currents on the radiation pattern, thus significantly improving the broadside directivity of the antenna. A novel structure miniaturization scheme is proposed. The conductive strips are meandered to reduce the size of the antenna and the proposed antenna is designed. A pair of differential power dividers is utilized to replace the complex feeding network of the normal antenna array, thus simplifying the structure of the antenna. A prototype is then fabricated and measured to verify our design. The results show that the proposed dual-polarized three-element array operates from 3.4 to 3.6 GHz with the advantages of high gain, simple feeding, and low loss, which is attractive in high-directivity and dual-polarization applications.