Impedance matched dielectric window
AssigneeThomson-CSF
InventorJacques Tikes
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Abstract
The microwave window is inserted in a rectangular waveguide and is constituted by a half-wave impedance transformer, the wavelength considered being such as to correspond to the central frequency F.sub.0 for which the window has been realized; a dielectric plate of small thickness is mounted above the transformer and two inductive shutters are located on each side of the plate. The dimensions of the window components are so determined that in the case of a matched waveguide, the standing-wave ratio of the window is substantially 1 in a frequency band of at least 35% of the central frequency around the central frequency.
Claims11
A microwave window in a microwave device, wherein said window comprises:
- a half-wave impedance transformer, whose wavelength corresponds to the central frequency of the window;
- the remainder of the window being constituted by at least one inductive shutter and one dielectric plate, said dielectric plate having a small thickness substantially equal to the thickness of said shutter, said inductive shutter and said dielectric plate being mounted above the half-wave transformer at its middle and the assembly constituted by said transformer surmounted by said plate and said shutter closing the microwave device hermetically;
- the dimensions of the window being so determined that in the case of a matched microwave device, the standing-wave ratio of the window is substantially equal to one in a frequency band of at least 35% of the central frequency.
Dependencies are inferred from the claim text.