Tapered waveguide transition section with dielectric sleeve positioned to reduce coupling between te circular modes
    26.
    发明授权
    Tapered waveguide transition section with dielectric sleeve positioned to reduce coupling between te circular modes 失效
    带有介质套筒的锥形波导过渡段定位成减少圆形模式之间的耦合

    公开(公告)号:US3146414A

    公开(公告)日:1964-08-25

    申请号:US20532662

    申请日:1962-06-26

    CPC classification number: H01P1/163 H01P5/024

    Abstract: 1,036,846. Waveguides. WESTERN ELECTRIC CO. Inc. June 20, 1963 [June 26, 1962], No. 24564/63. Heading H1W. Generation of unwanted modes in a waveguide taper is reduced by providing a low-loss dielectric member at a position where the electric field-intensity of the unwanted mode is low and the intensity of the wanted mode is high. The invention may be applied to wave guides designed for transmission of the circularelectric TE 01 mode having tapered transmissions designed according to the methods described in Specification 883,179 and in the article " Circular Waveguide Taper of Improved Design," published in the Bell System Telephone Journal, July, 1958. Such a taper 12 is provided with a dielectric sleeve 13 supported, e.g. by dielectric discs 14, 15. Suppression of the TE 02 mode is achieved if the average radius b of the sleeve at a point is related to the taper radius a at that point by b/a=k 1 /k 2 , where k 1 and k 2 are roots of the Bessel junction of the first kind and order and are equal to 3À832 and 7À016 respectively. The thickness of the sleeve may be constant or may vary as 1/a. A further sleeve may be added, designed to prevent generation of the TE 03 mode. The tapers may consist of helical waveguide as described in Specification 883,439. The Specification contains a theoretical discussion of the invention.

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