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Assembled dual-band quadrifilar helix antennas (QHAs) are proposed for applications in Compass Navigation Satellite System (CNSS) of China. The assembled CNSS antennas proposed are designed specifically to meet the requirements of the system: Duplex communication service on two frequency bands (1.615 GHz and 2.492 GHz); Broad beamwitdh on radiation pattern and broad bandwidth for circularly polarization...
In the report possibility of expansion of a strip of the coordination is discussed at build-up of antenna system on the basis of flat spiral structures at the expense of magnification of initial radius of spirals and application of conical transition on an inlet of radiators. The law of winding of a conductor in conical transition at which in a wide frequency band the qualitative coordination of the...
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