Dual frequency antenna feeding

Details Dual frequency antenna feeding Dual frequency antenna feeding

H - Electricity

01

Q

351/26, 351/57

H01Q 13/02 (2006.01) H01Q 5/00 (2006.01) H01Q 13/06 (2006.01)

Patent

CA 1270557

ABSTRACT OF THE DISCLOSURE A dual frequency antenna feed includes colinear axially spaced coaxial and circular waveguide cavities sepatrated by a conducting portion having a high frequency rectangular waveguide therein extending radially outward. The coaxial cavity includes a tubular inner conductor having a polarization rotator connected to the rec- tangular waveguide for propagating high frequency energy. Four small coaxial transmission lines equiangularly disposed about the cavity axes and terminating in probes about a quarter wavelength from the end of each cavity intercouples the circular and coaxial cavities. The end of the coaxial waveguide cavity forms an aperture for high frequency energy from the conducting inner tube and for the low frequency energy from the region between the conducting inner tube and the cylinder surrounding the outside of the cavity. The radiating aperture is surrounded by a set of concentric conducting rings.

528380

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