Wave transmission lines and networks – Wave mode converters
Reexamination Certificate
2008-01-29
2008-01-29
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Wave mode converters
C333S251000
Reexamination Certificate
active
10535236
ABSTRACT:
The invention relates to a method for conversion of waveguide modes from a mode of type TM01to mode of type TE11for transmission of power within the microwave range. The invention also relates to a mode-converting arrangement and an antenna arrangement with such a mode converting arrangement. The mode-converting arrangement comprises an incoming waveguide (1) for reception of power of the type TM01-an outgoing waveguide (6) for outputting power of mode type TE11and a waveguide-mode-converting section (2-5) arranged between the incoming and outgoing waveguides. According to the invention, incoming power of mode type TM01is divided in an input section (2) between two or more waveguides with cross-sections in the shape of circle sectors. Thereafter, the divided power is phase-shifted by the waveguides in a subsequent phase-shift section (4) being designed with cross-sections that are essentially in the shape of circle sectors with different radii, after which the waveguides are changed into a common essentially circular waveguide (6) that emits an outgoing power of mode type TE11. By means of the invention, a relatively simple solution is produced that can cope with high powers.
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Franklin Eric J.
Saab AB
Takaoka Dean
Venable LLP
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