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Methods of suppression of cross‐polarized power for the CPW ‐fed monopole antenna
Author(s) -
Wang ChienJen
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30657
Subject(s) - ground plane , monopole antenna , wideband , physics , strips , polarization (electrochemistry) , coplanar waveguide , optics , electrical impedance , antenna (radio) , radiation , electrical engineering , materials science , engineering , chemistry , quantum mechanics , microwave , composite material
In this article, we propose several techniques for radiation characteristics improvement of a coplanar waveguide‐fed monopole antenna with an asymmetric ground plane. Although utilization of an asymmetric ground plane provides wideband impedance characteristics, the cross‐polarization of the monopole antenna increases, resulting from the unbalanced horizontal currents of the ground plane. The proposed techniques, which include etching a notch at the feedline, embedding a slot array in the ground plane, and adding several conducting strips on the top and bottom planes, are used to suppress cross‐polarized power. From the simulated and measured results, it can be observed that the ratios of the maximum co‐polarized power to the maximum cross‐polarized power have been enhanced at the operating bands. The mechanisms of cross‐polarization suppression are explained by using current density distributions.