Sub-reflector of a dual-reflector antenna
AssigneeAlcatel Lucent
InventorsDenis Tuau, Armel Le Bayon
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Abstract
The aim of the present invention is a sub-reflector of a dual-reflector antenna comprising: a first end having a junction of a first diameter, adapted for coupling to the end of a waveguide, a second end, having a second diameter greater than the first diameter, a convex reflective internal surface placed at the second end having an axis of revolution, an external surface of the same axis, joining the two ends, a dielectric material extending between the first and the second ends and limited by the internal surface and the external surface, In accordance with the invention, the external surface has a convex profile described by a polynomial equation of the sixth degree of the formula: y=ax6+bx5+cx4+dx3+ex2+fx+g where a is not zero.
Claims5
Sub-reflector of a dual-reflector antenna comprising:
- a first end having a junction of a first diameter, adapted for coupling to the end of a waveguide (3),
- a second end, having a second diameter greater than the first diameter,
- a convex reflective internal surface (12) placed at the second end having an axis of revolution (13),
- an external surface (14) of the same axis (13), joining the two ends,
- a dielectric material (11) extending between the first and the second end and limited by the internal surface (12) and the external surface (13),
- characterized in that the external surface (14) has a convex profile described by a polynomial equation of the sixth degree of the formula:
- y=ax6+bx5+cx4+dx3+ex2+fx+g where a is not zero.
Dual-reflector antenna comprising a primary reflector (1) and an associated sub-reflector (2, 10,), characterized in that the sub-reflector (2, 10) comprises:
- a first end having a junction of a first diameter, adapted for coupling to the end of a waveguide (3),
- a second end, having a second diameter greater than the first diameter,
- a convex reflective internal surface (12) placed at the second end having an axis of revolution (13),
- an external surface (14) of the same axis (13), placed as close as possible to the primary reflector (1), having a convex profile described by a polynomial equation of the sixth degree of the formula:
- y=ax6+bx5+cx4+dx3+ex2+fx+g where a is not zero,
- a dielectric material (11) extending between the first and the second end and limited by the internal surface (12) and the external surface (14).
Dependencies are inferred from the claim text.