Premium
Design of dual‐band annular slot antenna with strip‐loaded approach
Author(s) -
Chiang MengJu,
Tseng ChingHung,
Sze JiaYi,
Bor SheauShong
Publication year - 2010
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.25165
Subject(s) - strips , slot antenna , miniaturization , standing wave ratio , coplanar waveguide , multi band device , microwave , return loss , optics , electrical engineering , materials science , radiation pattern , optoelectronics , antenna (radio) , engineering , physics , microstrip antenna , telecommunications , composite material
This article investigation develops and experimentally explores the dual‐band design for a compact coplanar waveguide (CPW)‐fed annular slot antenna loaded with conducting strips.In the proposed strip‐loaded design, the arc‐like metal strips excite the first resonant mode at the operating frequency, which is lower than that of the annular slot antenna, to achieve miniaturization. The prototype is implemented on a 0.8 mm FR‐4 substrate with ε r = 4.4; the outer and inner radii of the compact annular slot are 9.0 mm and 6.5 mm, respectively. The return loss of the proposed design reveals two operating bands with a VSWR of 2.5: 1 over bandwidths of 3.5% and 9.8%, respectively. Two resonant bands exhibit the broadside radiation patterns with the peak antenna gains of 1.3 dBi and 4.9 dBi, respectively. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1398–1402, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25165