The design of shaped-beam bifilar helix antenna with conical pattern

【Author】

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

【Abstract】

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.

【Keywords】

helix antenna; bifilar helix antenna; shaped-beam; impedance match

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