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Printed monopole antenna with tunable band‐notched characteristic for use in mobile and ultra‐wide band applications
Author(s) -
Elfergani I. T. E.,
Hussaini A. S.,
See C. H.,
AbdAlhameed R. A.,
McEwan N. J.,
Zhu S.,
Rodriguez J.,
Clarke R. W.
Publication year - 2015
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20874
Subject(s) - standing wave ratio , varicap , monopole antenna , impedance matching , notching , radiation pattern , electrical impedance , dipole antenna , antenna (radio) , bandwidth (computing) , microwave , materials science , electrical engineering , optoelectronics , optics , physics , engineering , microstrip antenna , telecommunications , capacitance , electrode , quantum mechanics , metallurgy
A tunable band‐notch printed monopole antenna is presented, exhibiting a wide impedance bandwidth from 1.5 to 5.5 GHz with good impedance matching (VSWR ≤ 2) and a tunable rejected frequency band from 2.38 to 3.87 GHz. The band‐notching is achieved by adding an inner chorded crescent element within a driven element of a similar shape. By varying the value of the varactor, which is placed between the inner and outer arcs, the desired variable rejected can be obtained. Simulated and measured results show wide impedance bandwidth with a tunable band notch, stable radiation patterns, and consistent nearly constant gain. The antenna is suitable for mobile and portable applications. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:403–412, 2015.