A Tri-Band Dual-Polarized Omnidirectional Dielectric Resonator Antenna With a Planar Feed for Indoor Applications
Peng Fei Hu, Kwok Wa Leung, Yongmei Pan, Shao Yong Zheng
Abstract
A tri-band dual-polarized omnidirectional dielectric resonator antenna (DRA) with a planar feed is investigated. Both vertical and horizontal polarizations are obtained by using a novel feed network that has two sets of feeding circuits. The former polarization is obtained by using a circular patch with eight shorted stubs, each having a V-shaped open stub, whereas the latter is obtained by using two integrated loops. For demonstration, the tri-band dual-polarized DRA is designed in 2.4-, 5.2-, and 5.8-GHz bands for Wi-Fi applications, with polarization isolations of 16, 25, and 23 dB, respectively. The diameter and height of the antenna prototype are only <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.640\lambda _{0}$ </tex-math></inline-formula> and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.162\lambda _{0}$ </tex-math></inline-formula> , respectively, where <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\lambda _{0}$ </tex-math></inline-formula> is the lowest operating wavelength in vacuum. Dielectric resonator (DR) TM modes, DR TE modes, a DR-loaded planar monopole mode, and a loop mode are used in the design, and the details will be given in this article.