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Quadrifilar Helix
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Building a Quadrifilar Helix Antenna for Undergraduate ...
rish.kyoto-u.ac.jpthe extremly effective and efficient Quadrifilar Helix Antenna. The Quadrifilar Helix Antenna (QHA) is a simple and inexpensive solution to the problem of non-geosynchronous satellite research. This antenna is unique in its simplicity of design and powerful performance compared with standard directional receivers. Once relatively