新型异面结构高功率Vivaldi天线

Vivaldi天线属于非频变天线,充分利用该天线超宽的工作频带、辐射定向性良好、输入阻抗稳定、效率高、结构简单、造价低廉、平面易集成的特点进行新结构高功率天线的设计.高功率器件必须解决的难点是部件之间的放电问题.将Vivaldi天线的两个辐射面分置于介质衬底的两侧,得到一种具有耐高压特性好、相对对带宽达196%的新型异面结构高功率天线.为解决异面结构的馈电问题,将天线交错设计,采用平行板波导过波结构馈电,得到了相对带宽达180%的带宽.

A New Opposed Structure High Power Vivaldi Antenna

Vivaldi antenna is a kind of the non-variable-frequency antenna. Taking full advantage of the wide-band, directive radiation, input impedance stability, high efficiency, simple structure, low cost and easy integration features, a high-power new structure antenna is developed. A problem to be solved for high-power devices is the discharge problem among its parts. The reported opposed structure solves that problem effectively. Besides, up to 196 percent bandwidth is also achieved. In order to resolve the feeding problem of the new structure , the input impedance is reduced to 40 ohm and a parallel waveguide-fed is used. This fed method can get the relative bandwidth about 180 percent.