【摘 要】
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一、引言在六十年代和七十年代,微波集成电路(MIC)的发展使人们有可能对有源孔径相控阵天线进行研究。有几种这样的系统已经实现,并得到验证。德克萨斯仪器公司在六十年代后
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一、引言在六十年代和七十年代,微波集成电路(MIC)的发展使人们有可能对有源孔径相控阵天线进行研究。有几种这样的系统已经实现,并得到验证。德克萨斯仪器公司在六十年代后期研制的分子电子学雷达阵列(MERA)系统就是早期的一个例子。然而,在大多数情况下,由于所需要的微波元件成本高且缺乏可再现性,这样的系统仍旧花钱多,而且不实用。新近已经利用象PAVE/PAWS和COBRA/DANE一类的相控阵。然而,它们的体积很大,花钱多,从特性上来说,又要求一致性好。在七十年代和八十年代,单片微波集成电路
I. INTRODUCTION In the 1960s and 1970s, the development of microwave integrated circuits (MICs) made it possible to study active aperture phased array antennas. Several such systems have been implemented and validated. Texas Instruments’ Molecular Electronics Radar Array (MERA) system, developed in the late 1960s, is an early example. However, in most cases, such systems are still costly and impractical due to the high cost and lack of reproducibility of the required microwave components. Phased arrays such as PAVE / PAWS and COBRA / DANE have recently been utilized. However, they are bulky and costly, and they require good consistency in terms of features. In the seventies and eighties, monolithic microwave integrated circuits
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