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Nonuniform inverted‐L slot double‐sided array antenna for LTE and WLAN application
Author(s) -
Islam I.,
Jamlos M. F.,
Jamlos M. A.
Publication year - 2015
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.29221
Subject(s) - reflection coefficient , reflector (photography) , side lobe , optics , antenna (radio) , microwave , radiation pattern , physics , reflection (computer programming) , materials science , acoustics , telecommunications , engineering , computer science , light source , quantum mechanics , programming language
ABSTRACT A nonuniform inverted‐L Slotted double‐sided array antenna for Long Term Evolution (2.6 GHz) and Wireless Local Area Network (5.8 GHz) application is presented in this article. The proposed antenna is a combination of 4 × 2 radiating element array at the both sides of the FR4 substrate where the both side array are designed reciprocally opposite to each other. It is found that double‐sided array with nonuniform inverted‐L slot suppresses the side lobe less than −20 dB at both frequencies. The 3‐mm air gap which separates the substrate and reflector is discovered to enhance further the reflection coefficient and gain. The upper side plane with smaller inverted‐L slots generates 5.8 GHz frequency and capable to achieve gain of 10.1 dB. Meanwhile 7.11 dB of gain at 2.6 GHz frequency is produced by the lower side plane with bigger inverted‐L slots. The proposed antenna achieves acceptable reflection coefficient at both operated frequencies for simulation and measurement. However, the reflection coefficient at the lower frequency 2.6 GHz reaches −17.588 dB (simulated) and −15.84 dB (measured) and at the upper frequency 5.8 GHz is about −12.26 dB (simulated), −15.71 dB (measured). Good agreement is obtained between simulated and measured result for E‐plane and H‐plane radiation pattern at both frequencies. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1915–1919, 2015