Focusing microwave applicator
AssigneeCommissariat a l'Energie Atomique
InventorsJean-Pierre Furtlehner, Alexandre Hugla
Life of this patent
Estimating the term…
Abstract
The microwave applicator for microwaves outputs from a guide (1) comprises an envelope (3) that forces microwaves to converge towards a focal point (16) by means of a complementary central reflector (4). A fraction of the waves reaches this point after reflection on two facets (11, 13), usually curved and concave, of the reflector (4) and the envelope (3), while the other fraction is reflected three times on three facets (10, 12 and 14), the last two facets of which form part of the envelope and one of which is concave for focussing. These devices can be used for removing a concrete surface, because the microwaves cause vaporisation at the focal point (16).
Claims21
Microwave applicator placed at the end of a microwave guide (1) comprising an envelope (3) with a reflecting inner face with a bottom and an opening (7) opposite each other, the microwave guide opening into the bottom of the envelope, and a central reflector (4) placed in the envelope and comprising one face directed towards the microwave guide and profiled such that the reflector and then by the inner face of the envelope converging approximately towards a focal point (16) located in front of the opening of the envelope, characterized in that the said face of the central reflector comprises a first central facet (10), a second lateral facet (11) on the sides of the microwave guide, and the inner face of the envelope comprises a first central facet (12), a second facet (13) and then a third facet (14) on each side of the microwave guide, the facets being modeled such that a first portion of the microwaves reaches the focal point after being reflected by the second facet of the second reflector (11) and then the second facet (13) of the envelope, and a second portion of the microwaves reaches the focal point after being reflected by the first facet (10) of the central reflector, the first facet of the envelope (12) and then the third facet (14) of the envelope.
Dependencies are inferred from the claim text.