Multi-band antenna for simultaneously communicating linear...

H - Electricity – 01 – Q

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H01Q 5/00 (2006.01) H01Q 13/02 (2006.01) H01Q 15/24 (2006.01)

Patent

CA 2753572

Multi-band antennas for simultaneously communicating linear polarity low-band signals and circular polarity high-band signals via a single antenna horn structure. The antennas horn structures have circular and oblong cross-sections. Strategic location and orientation of low-band and high-band ports with respect to internal ridges in transition sections and the major and minor axes of the oblong horn allows the antenna to simultaneously manipulate the high-band circular polarity signal without affecting the linear polarity low-band signals. The oblong horn shape and ridges may apply additive or oppositely sloped differential phase shifts to the linear components of the circular polarity high-band signal. For the horns with circular cross-section, the internal ridges may apply additive or oppositely sloped differential phase shifts to polarize the circular polarity high band signals without assistance from the internal shape of the horn.

L'invention concerne une antenne multibande pour communiquer simultanément des signaux de polarité linéaire de basse bande et des signaux de polarité circulaire de haute bande via une unique structure d'antenne cornet. Les structures d'antenne cornet ont des sections transversales circulaires et oblongues. Une position et une orientation stratégiques de ports de basse bande et de haute bande par rapport à des crêtes internes dans des sections de transition et les axes majeur et mineur du cornet oblong permettent à l'antenne de manipuler simultanément le signal de polarité circulaire de haute bande sans affecter les signaux de polarité linéaire de basse bande. La forme du cornet oblong et les crêtes permettent d'appliquer des déphasages différentiels de pente additionnelle ou opposée aux composantes linéaires du signal de polarité circulaire de haute bande. Pour les cornets à section transversale circulaire, les crêtes internes permettent d'appliquer des déphasages différentiels de pente additionnelle ou opposée pour polariser les signaux de polarité circulaire de haute bande sans l'assistance de la forme interne du cornet.

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