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Analysis and modeling of dual‐band ACMPA with asymmetric crossed slots
Author(s) -
Lim Sang Ho,
Jung Chae Hyun,
Kim Se Young,
Myung Noh Hoon
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.25761
Subject(s) - microwave , multi band device , aperture (computer memory) , radiation , slot antenna , microstrip , radiation pattern , optics , physics , electronic engineering , acoustics , computer science , electrical engineering , engineering , antenna (radio) , telecommunications
This article describes an accurate and efficient modeling of dual‐band aperture‐coupled microstrip patch antennas (ACMPAs) that have two types of asymmetric crossed slots.An asymmetric crossed slot ACMPA (ACS‐ACMPA) is initially studied, and an asymmetric H‐shaped crossed slot ACMPA (AHSCS‐ACMPA) is then proposed and modeled to reduce the back radiation from the slots. To verify the suggested modeling, antennas operating at 3 GHz and 5 GHz are designed and fabricated. The computed resonance frequencies from the suggested modeling show excellent agreement with the simulated and measured results (with an error of less than 1% for the ACS‐ACMPA and 1.34% for the AHSCS‐ACMPA). To confirm the reduction of the back radiation, we simulated and measured the radiation patterns of the antennas. By using H‐shaped slots, we obtained a front‐back ratio enhancement of 2.6 dB at 3 GHz and 1.9 dB at 5 GHz. Because of their accuracy and simplicity, the proposed modelings are useful for the analysis and design of an ACS‐ACMPA and an AHSCS‐ACMPA for dual‐band operation. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:679–686, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25761