超高频雷达

1988和1990年秋季，在南京市郊江浦县用超高频雷达、气球拖带空中捕虫网及田间笼罩，对褐飞虱秋季回迁进行了研究。

Radar , aerial netting and ground sampling were used to study the autumn migration of Nilaparvata lugens ( Stal ) in Jiangpu County , suburb of Nanjing City , in 1988 and 1990.Jiangpu with single middle and late rice .

甚高频和超高频多普勒雷达

VHF and UHF Doppler radar

比较了国内外小型超高频合成孔径雷达天线的结构。研究表明，利用宽偶极子和微带组阵能为有限平台提供重量轻、结构小、增益高和宽频带的超高频合成孔径雷达天线。

By a comparison of the existing structure of miniature UHF antennas for aircraft SAR , it is indicated that making use of wide dipole array can offer lightweight , small structure , high gain and wide-band UHF antenna with the finite ground screen .

针对超高频机载合成孔径雷达天线小型化、高增益和宽频带的问题，分析了短背射天线缩小背腔的增益损失。

To meet the requirements of miniaturization , high gain and wideband of UHF antenna for aircraft SAR , the gain loss produced by narrowing back cavity of short back radiation antenna is analyzed .

阐述当前超高频天线宽带小型化的几种主要技术，具体介绍了三种新型机载超高频合成孔径雷达天线的结构和电参数，指出了超高频天线宽带小型化的发展方向。

The paper presents some main techniques of the small-scaled wideband UHF antenna , introduces three new ultra-wideband UHF antennas used for airborne SAR in detail , and points out the development trend of the small-scaled wideband UHF antenna .