Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TC4
Session:
Number:3TC4-2
Design of a broadband and high gain antenna with an inhomogeneous and uni-period structure for Ku-band applications
Jui-Hung Chen, Chun-Yih Wu, Ta-Chun Pu, Hung-Hsuan Lin,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
In past few decades, lots of researchers investigated the high gain antenna designs for high data rate and point-to-point RF-transmission applications. In order to achieve higher gain for a planar antenna, multi-source or array approach is usually applied [1]. It could achieve uniform current distribution and get good aperture efficiency by dedicatedly adjusting the feeding network to control the phase and amplitude of each antenna element of the array. However, the upper limitation of antenna array is bounded due to the ohmic and dielectric losses of the complex feeding network [2]. To reduce the feeding network loss, Fabry-Perot structure based on quasi-optical theory is used to enhance antenna performance [3-4]. Those works use a FSS (frequency selective surface) as a semi-transparent layer at desired operating band to cover on a large reflective ground surface with a single feeding element, which could be a patch-type or dipole-type antenna. Theoretically, higher the quality factor of Fabry-Perot cavity was deigned, narrower impedance bandwidth will be. Recently, several complex FSS structures are proposed to control the filed distribution in the Fabry-Perot cavity such as multi-layer FSS structure [5] and multi-resonator FSS structure [6-7] to improve the operation bandwidth. In this paper, a novel dual-resonator FSS structure composed by the unit cell structure of metallic square patches and loops was proposed and studied. It could be observed that broader impedance bandwidth and antenna radiation performance was achieved. In addition, owing to the inhomogeneous and uni-period cell arrangement of this design, it’s very promising for antenna optimization and industrial manufacturing.