Xiao-yun Qu1,Wei-hua Zong2 ,Zhi-qun Yang1,and Jian-ming Mu1 1 China Aerospace Science and Technology Corporation No.513 Institute,Yantai,Shandong Province,China 264003 2 Shandong Provincial Key Laboratory of Industrial Control Technology,School of Automation Engineering,Qingdao University,Qingdao,Shandong Province,China 266071
A shaped-beam antenna is proposed using bifilar helix antenna. The antenna is fed by a notched balancer. The radiation pattern and the axial ratio changing with the helix pitch distance are simulated in the paper. The measured gain and |S11| are also given. The antenna has a wide bandwidth of more than 40% with conical radiation pattern and circular polarization. It can be used in outer space communications due to its low profile and high reliability.
helix antenna; bifilar helix antenna; shaped-beam; impedance match
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