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on exploration of pattern

机译:论模式探索

摘要

A broadside array antenna arrangement capable of scanning electronically in one or two planes, wherein the transmitted or received frequency remains fixed although beam steering is effected by progressive phase shifts introduced to the various array elements as provided by the expedient of frequency variations. A prime oscillator frequency fo is mixed with a variable steering oscillator frequency fs to produce sum and difference frequencies fo + fs and fo - fs. The latter is fed to a delay line having a plurality of taps spaced apart in accordance with the particular arrangement of array elements, the delay line providing in the frequency signal fo - fs progressive phase shifts from tap to tap. The individual tap outputs are separately mixed with the sum frequency signal fo + fs, wherein N separate outputs are simultaneously derived having the same frequency of 2fo but varying from one another progressively in phase. Variation of fs, which causes the phase relationship between the N outputs to change as they are fed to the radiators in one-to-one correspondence, thus provides a sweep of the beam in one plane. Raster type scanning is provided by introducing a multi-tapped secondary delay line at each tap of the primary delay line and mixing instead the tap outputs of each secondary delay line individually with fo + fs and applying the resultant 2fo outputs to individual ones of a corresponding element row of a two-dimensional array. The tapped spacings on each of the secondary delay lines relative to the tapped spacings of the primary delay line is such as to provide scanning of an order of magnitude more sensitive in one plane.
机译:一种能够在一个或两个平面内进行电子扫描的宽边阵列天线装置,其中,尽管通过频率变化的权宜之计引入到各种阵列元件的渐进式相移来实现波束控制,但发射或接收的频率仍保持固定。将主振荡器频率fo与可变转向振荡器频率fs混合,以产生总和和差频率fo + fs和fo-fs。后者被馈送到具有根据阵列元件的特定布置而间隔开的多个抽头的延迟线,该延迟线在频率信号fo-fs中提供从抽头到抽头的渐进式相移。各个抽头输出分别与总和频率信号fo + fs混合,其中同时获得N个独立的输出,具有相同的2fo频率,但相位彼此逐渐变化。 fs的变化会导致N个输出之间的相位关系以一一对应的方式变化,从而导致N个输出之间的相位关系发生变化,从而在一个平面内对光束进行扫描。通过在主延迟线的每个抽头处引入多抽头的次级延迟线,并将每个次级延迟线的抽头输出分别与fo + fs混合,然后将得到的2fo输出应用于相应的单个输出,从而提供光栅类型的扫描二维数组的元素行。相对于初级延迟线的分接间隔的每条次级延迟线上的分接间隔使得在一个平面中提供更灵敏的数量级扫描。

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