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A CPW‐fed slot antenna with embedded ring‐type strip for dual‐frequency operation
Author(s) -
Chiang MengJu,
Wei ChiaYen,
Bor SheauShong
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.26370
Subject(s) - planar , microwave , center frequency , coplanar waveguide , electrical engineering , bandwidth (computing) , ring (chemistry) , radius , slot antenna , wideband , optics , optoelectronics , materials science , antenna (radio) , engineering , physics , microstrip antenna , telecommunications , computer science , chemistry , band pass filter , computer graphics (images) , computer security , organic chemistry
The coplanar waveguide‐fed planar slot antenna with the embedded ring‐type strip for dual‐frequency operation is investigated and experimentally explores in this letter. The prototype, which is implemented on the 0.8‐mm FR‐4 substrate with ε r = 4.4, indicates that the embedded ring‐type strip offers extended path for the electric current flow, achieving 45.1% size reduction of the fundamental resonant mode. The ratio of the center frequencies of the first two resonant bands can be tuned within a range wider than 1.81 by increasing the radius and line width of ring‐type strip. Furthermore, the fundamental resonant mode can be shifted to the higher frequency to combine with the second resonant mode of the circular slot, indicating the wideband operation with the bandwidth of 1332 MHz (40.5%). © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2882–2887, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26370