A High Gain Broadband Vertically Polarized Omnidirectional Printed Antenna for Aircraft Surface Application

This paper proposes a high gain broadband vertically polarized omnidirectional printed antenna for aircraft surface application. In order to achieve gain improvement, a printed choke sleeve, which can eliminate the influence of the radiation from the feeding coaxial line and the ground plane on the proposed antenna, is introduced between the feeding coaxial line and the antenna radiator. The omnidirectional gains range from 3.90 dBi to 5.64 dBi in the operating band of 4.40-5.50 GHz, which is 2.9 dB better than that of the conventional omnidirectional antenna without the choke sleeve. The proposed antenna possesses the characteristics of omnidirectional, broadband and high gains. It can be used on aircraft application.