Research Article A Compact High-Gain Coplanar Waveguide-Fed Antenna for Military RADAR Applications Zaheer Ahmed Dayo, 1 Qunsheng Cao , 1 Yi Wang, 1 Sandeep Pirbhulal, 2 and Ali Hassan Sodhro 3,4 1 CollegeofElectronicandInformationEngineering,NanjingUniversityofAeronauticsandAstronautics,Nanjing211106,China 2 Department of Information Security and Communication Technology, Norwegian University of Science and Technology, 2815 Gjøvik, Norway 3 Computer and Information Science Department, Linkoping University, Linkoping, SE-58183, Sweden 4 Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen (SIAT, CAS), Shenzhen, Guangdong 518000, China CorrespondenceshouldbeaddressedtoQunshengCao;qunsheng@nuaa.edu.cn Received 17 February 2020; Revised 9 May 2020; Accepted 29 June 2020; Published 20 August 2020 AcademicEditor:MohammodAli Copyright©2020ZaheerAhmedDayoetal.isisanopenaccessarticledistributedundertheCreativeCommonsAttribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properlycited. ispaperpresentsanewdesignofacompact,high-gaincoplanarwaveguide-fedantennaandproposesamultielementapproach to attain enhanced characteristics. e proposed method overcomes the simulation and geometrical complexity and achieves optimal performance features. e antenna prototype is carefully designed, and simulation results have been analyzed. e proposedantennawasfabricatedonanewWangLingTP-2laminatewithdimensions(0.195λ × 0.163λ × 0.0052λ)atthelowest resonance of 9.78GHz. e results have been tested and experimentally verified. e antenna model achieved excellent per- formanceincludingapeakrealizedgainbetterthan9.0dBi,optimalradiationefficiencybetterthan87.6%overtheoperatingband, andagoodrelativebandwidthof11.48%at10dBreturnloss.Symmetricalstablefar-fieldradiationpatterninorthogonalplanes andstrongdistributionofcurrentareobserved.Moreover,acomparativeanalysiswithstate-of-the-artworkispresented.e measuredandsimulationresultshowsagoodagreement.ehigh-performanceantennaresultsrevealthattheproposedmodelis a good contender of military airborne, land, and naval radar applications. 1. Introduction e immense technological advancement in the wireless com- munication systems has switched focus to the development of compact, high gain, and radiation efficient antennas. Such an- tennasystemscanbeusefulforvariouswirelesscommunication applications including radar (radio detection and ranging), satellite, intercommunication, and navigational system [1]. Federal communication commission (FCC) under the third generation partnership project (3GPP) has allocated frequency ranges for different wireless communication appli- cations.Forinstance,militaryairborne,land,andnavalradars operatein X band8–12GHz,ISM,andwirelessfidelity(WiFi) on 2.4GHz frequency band spectrum, and worldwide inter- operability over microwave access (WiMAX) operates on a 3.5–5.8GHzfrequencyrange[2,3].erefore,itisessentialto developthehigh-performanceantennaswhichcanbeutilized with an efficient wireless communication system, particularly for airborne, land, and naval radar applications. e con- ventional compact planar antennas (CPA) have low gain, limited radiation efficiency, and narrow bandwidth (BW) performance [4]. So, to improve CPA performance, studies have used different techniques. In past studies, researchers tried to enhance the key performance parameters of the CPA by incorporating the variousapproaches[5–8].Besides,severaldesignsbasedon different shapes of slots [9–12], radiators [13–16], and ground plane [17, 18] have been proposed to attain the substantialpeakrealizedgain,goodradiationefficiency,and acceptable impedance BW along with perfect matching Hindawi International Journal of Antennas and Propagation Volume 2020, Article ID 8024101, 10 pages https://doi.org/10.1155/2020/8024101