七年级英语周报答案专利名称：Wide-band gyrotron traveling-wave amplifier
empire state>ditch>主语从句发明人：Yue-Ying Lau,Kwo R. Chu,Victor L.
Granatstein,Larry R. Barnett
标点符号的正确用法
申请号：US06/389133
申请日：19820616
公开号：US04533875A
公开日：
19850806
专利内容由知识产权出版社提供
摘要：A high power amplifier for amplifying millimeter-wave radiation comprising: a length of metallic waveguide tapered from a small cross- ctional end to a larger cross-ctional end; a magnetron-type electron injection gun for injecting a spiral beam of relativistic electrons at the small end of the waveguide for propagation axially therein so that the wall radius of the tapered waveguide increas in the downstream direction of the electron beam; an input coupler for launching electromagnetic waves to be amplified into the waveguide at the large waveguide end thereof such that the individual frequencies in the input waves are reflected at various points along the constriction of the waveguide taper so that they copropagate with and are amplified by the electron beam; and a magnetic circuit for generating an axial magnetic field within the tapered waveguide with a unique profile approximately in accordance with the following equation to maintain synchronism: ##EQU1## where the z subscript is the waveguide axial direction, the ⊥ subscript designates the direction perpendicular to this axial direction, and the o subscript reprents tho quantities at the entrance point for the electron beam into the waveguide.
This device has been found experimentally to have negligible launching loss and low nsitivity to electron velocity spread.
你见或者不见我申请人：LAU; YUE-YING,CHU; KWO R.,GRANATSTEIN; VICTOR L.,BARNETT; LARRY R.冯骥才的文章
做一个有道德的人代理人：Robert F. Beers,William T. Ellis
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