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Front to back ratio improvement of a micro strip patch antenna using dual‐band isolated soft surface structures
Author(s) -
Kim JuneHyong,
Lee HongMin
Publication year - 2011
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.26265
Subject(s) - patch antenna , microstrip antenna , materials science , ground plane , monopole antenna , antenna (radio) , coaxial antenna , wimax , optics , optoelectronics , electrical engineering , engineering , physics , telecommunications , wireless
This article presents a microstrip patch antenna with a novel soft surface structure. The proposed soft surface structure is useful for suppressing surface waves in a dielectric substrate at dual frequency band (Bluetooth and Wimax). By removing the ground plane edges of the patch antenna and forming soft surfaces within the bare substrate, the front‐to‐back ratio of a patch antenna is significantly improved. The proposed new isolated soft surface structure does not share the ground plane of a patch and it consists of two loops with a corner edged via‐hole. When the three different size of isolated unit cells are used, the front‐to‐back ratio of the fabricated patch antenna improved from about −18.5 to −22.47 dB, compared to a conventional patch antenna without cells. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2396–2400, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26265