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A miniaturized slotted ground structure UWB antenna for multiband applications
Author(s) -
Ali Tanweer,
AW Mohammad Saadh,
Biradar Rajashekhar C.,
Andújar Aurora,
Anguera Jaume
Publication year - 2018
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.31298
Subject(s) - ground plane , wimax , bandwidth (computing) , antenna (radio) , impedance matching , radiator (engine cooling) , reflection coefficient , radiation pattern , electrical engineering , electronic engineering , optics , engineering , physics , acoustics , electrical impedance , telecommunications , wireless
A concept of using slots both in the radiator and in the ground to miniaturize an ultrawideband (UWB) antenna in order to operate at multiband is demonstrated. Initially, a miniaturized circular UWB antenna is designed which results in about 53.5% reduction in total volume and about 46.6% in the active patch area, in comparison to the conventional UWB antenna. To reconfigure the proposed UWB antenna to operate in multiband applications, slotted ground approach is used. The slots in the ground plane of the proposed design affects the surface current distribution due to which the designed antenna operates at 3.7 (middle WiMAX), 5.7 (upper WiMAX), and 7.5 GHz (X‐band) with −10 dB reflection coefficient bandwidth of about 5.3% (3.64–3.84 GHz), 5.5% (5.64–5.96 GHz), and 3.7% (7.44–7.72 GHz), respectively. The proposed configuration is compact in size with a total area of only 0.26λ 0 × 0.21λ 0 = 30 × 24.8 = 283.3mm , 2at lower resonating band of 2.6 GHz. The designed multiband structure yields good impedance matching, acceptable gain and stable radiation characteristics both in xz and yz plane, across their operational bandwidths.