| 摘要 |
The a polarized high-order mode electromagnetic wave converter and its coupling method, uses bifurcate structure to divide the input wave into two signals with the same amplitude but opposition phases, which are then inputted into a circular main waveguide through waveguide so that the input wave could convert into linearly polarized high-order mode in the main waveguide, and then undergo the polarization change conversion stage to convert the polarized wave into circularly polarized wave. The coupling method includes the electromagnetic wave bifurcate stage, mode conversion stage, and may combine with a polarization conversion stage. The TE21 coupler is tested with simulation computation and fabricated, and proved to product consistent results with the computer simulation. The coupler has features of high conversion efficiency, high mode purity, wide bandwidth, polarity control, and convenience in processing.
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