Design Strategies for Tripolarized Antennas with Wideband Characteristic

Abstract

Two design strategies to construct wideband tripolarized antennas are summarized and presented in this paper. First is a design method for a low-profile structure, which can achieve up to 24% fractional bandwidth with a profile of only 0:09λmin, (λmin is the free-space wavelength at the minimum operating frequency). When the antenna height can be compromised, i.e. increasing to about 0:17λmin, we will demonstrate how a substantially large fractional bandwidth of 80% can be achieved in an integrated structure.