A Novel Broadband Dual-Polarization Antenna with High Isolation

A novel broadband dual-polarization antenna composed of two orthogonal dipoles with high isolation is presented in this paper. Due to properly utilizing the strong regional mutual coupling between the two dipoles, a very good impedance matching and a sufficiently high isolation can be achieved simultaneously, the reasons for which will be explained at the conference. The measured results show that it has a 53.7% impedance bandwidth of 1.65GHz-2.86GHz with VSWR < 1.5 and isolation < 32dB. As an important advantage, the input impedance of the antenna can be well controlled within certain limits by adjusting the configuration, thus the antenna can be fed directly by coaxial cables without using impedance transformers or other feeding circuits. Besides, it has a simple and compact configuration.