Patent ID: 9024831
Filing Date: 2015-05-05
Classification: H01Q

Abstract:
1. A multifunction antenna comprising: a unidirectional radiator, a plurality of traveling-wave (TW) structures comprising stacked ultra wideband low-profile two-dimensional (2-D) surface-mode TW structures, wherein the surface-mode TW structure is excited in mode-0 and comprises a 2-D surface-mode TW radiator for omnidirectional radiation, a dual-mode feed network consisting of at least two separate feed networks, and a conducting ground plane; wherein the plurality of TW structures and feed networks being cascaded in a stack, with the appropriate frequency-selective coupler or decoupler between adjacent radiators; wherein the 2-D surface-mode TW structures being further configured to have a diameter less than λ wherein the multi-mode feed network consisting of at least two separate feed networks, one for the unidirectional radiator and one for each mode-0 2-D TW structure; and wherein the conducting ground surface is of a canonical shape, the conducting ground surface further being positioned at a bottom side of the antenna, and having a surface area covering at least the projection of the antenna.