Abstract
AbstractA small and lightweight antenna was developed which generates a circularly polarized conical beam in the desired direction by changing the incline angle of the linear antenna elements and the spacing between the antenna elements without phase shifters. the experiment for directivity of the circularly polarized conical beam antenna was carried out by using four monopole antennas, and the effectiveness of the theoretical analysis was confirmed.Next, experiments were carried out for the impedance and directivity with representative dimensions. the gain in the maximum direction was 4.5 dBi with an axial ratio of less than 2 dB and a standing wave ratio of less than 1.2.
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