Axial Mode Helical Antennas
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概要
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The radiation characteristics of helical antennas operating inthe axial mode are evaluated on the basis of the theoretical currentdistributions and are verified by experimental work. A comparisonbetween monofilar helix and bifilar helix antennas is made, and a helicalantenna with a parasitic helix (HAP) is proposed in order to enhance thepower gain. It is found that the gain of the HAP in which the parasitichelix is wound from a point diametrically opposite to that of one and onehalfturns of the driven helix is about 1 dB higher than that of themonofilar helix. The ratio of the frequency band in which the HAPradiates a circularly polarized wave within an axial ratio of 3 dB iscalculated to be 1:l.g.
- IEEEの論文
- 1986-09-00
IEEE | 論文
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