Patent ID: 8941551
Filing Date: 2015-01-27
Classification: H01Q

Abstract:
1. Ground connecting system for microwave antenna structures comprising a radiating body that is centrally connected at a tubular pillar member, a conductor ( 3 , 3 b ) passing through said tubular pillar member to feed the antenna with the power required for operation thereof, the power being supplied by a power supply source ( 2 ) located at ground level, a plurality of iron strips ( 6 , 6 a , 6 b , 16 a , 16 b ) being applied at selected regions of the radiating body of the microwave antenna structure with a scope of creating selected grounded regions and setting up a magnetic field onto the radiating surface of said radiating body of the antenna structure in between said selected grounded regions and non-grounded regions of the radiating surface, such as to result in the current being supplied through the conductor ( 3 , 3 b ) and received at a non-grounded region to be directly radiated and in the current being received at said selected grounded regions to be reflected towards the adjacent non-grounded area and subsequently radiated, thereby affording effective isolation of the radiating body from the power supply source, wherein in a microwave helical antenna structure ( 10 ) said radiating comprising a plurality of dielectric cylinders ( 11 ) arranged along the circumference and inwardly the radiating surface, each dielectric cylinder ( 11 ) located at the top of a coaxial power supply cable comprising a centrally located power supply conductor ( 3 b ) for a dielectric cylinder ( 11 ) located at the center of the radiating body and peripheral power supply conductors ( 3 a ) for the dielectric cylinders ( 11 ) located around the center and along the circumference of the radiating body, each of the dielectric cylinders ( 11 ) being helicoidally wound with a conducting wire ( 12 ) extending from an upper end at the top of the dielectric cylinder ( 11 ) to a bottom end at the bottom thereof, said bottom end being connected to said power supply conductor ( 3 a ) or ( 3 b ), ground connecting iron strips ( 16 a ) and ( 16 b ) being connected respectively at the upper and bottom ends of the conducting wires ( 12 ) of the dielectric cylinders ( 11 ) arranged along the circumference of the radiating body only, whilst no ground connecting strips being applied at the conducting wires ( 12 ) of the dielectric cylinder ( 11 ) located inwardly, whereby a grounded region is created along the circumference of the radiating body of said microwave helical antenna structure ( 10 ).