Wide-beam frequency-reconfigurable printed four-arm spiral navigation antenna
A four-arm helix and wide beam technology, applied in the field of wide-beam frequency reconfigurable printed four-arm helix navigation antenna, to achieve excellent axial ratio and circular polarization bandwidth, improve low elevation gain, and widen beam width.
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[0026] Example
[0027] Such as figure 1 As shown, a width beam frequency reconstructed printed four-arm helical navigation antenna covering the L-band, including a separate lower spiral, upper spiral, and parasitic array 10, antenna adopts a separation structure, a lower spiral probe feed, aprota The coupling feed is achieved by adjusting the relative position of the two parts.
[0028] Such as figure 2 As shown, the circularity of the navigation antenna is directly fed by four feed probe 7 pair of lower helical structures, and the upper spiral structure and the parasitic array 10 are supplied by coupled.
[0029] The upper spiral body includes a second dielectric sheet 2, a second spiral arm 4 printing on the second dielectric sheet 2, the second short-circuit connection arm 9 is printed on the second dielectric sheet 2 and the second dielectric sheet 2 Second mechanical structure 6;
[0030] The lower spiral body includes a first dielectric sheet 1, a first spiral arm 3 on the ...
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