Wide-band spiral antenna
AssigneeThomson-CSF
InventorsAlain Bizouard, Jean Rannou
Life of this patent
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Abstract
The invention relates to wide-band, plane, spiral antennas. A conductive arm is arranged spirally in a plane close to a reflector. A resonator member positioned at the centre and in front of the spiral assists the area opposite which it is situated to radiate at high frequencies, to the detriment of the peripheral areas. An absorbent member whose thickness increases from the centre to the periphery increases this effect even further.
Claims8
A wide-band spiral antenna comprising a reflector, at least one conductive, spiral arm arranged in a plane near said reflector, and a resonator member positioned centrally and in front of said spiral arm for increasing radiation at high frequencies from an area in front of which said member is situated.
A wide-band spiral antenna comprising a reflector, at least one conductive, spiral arm arranged in a plane near said reflector, a resonator member positioned centrally and in front of said spiral arm for increasing radiation at high frequencies from an area in front of which said member is situated, and an absorbent member positioned against and in front of said reflector, the thickness of said absorbent member increasing from the centre of the antenna to its periphery.
Dependencies are inferred from the claim text.