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引言裂缝波导阵天线在许多需要窄波束或赋形波束的微波通信和雷达系统中获得了应用。特别是用于机载设备,这里重量轻和扫描空域小是很重要的。这类天线是在波导窄壁或宽壁开有裂缝的阵列,它们既可以是谐振式的,也可以是非谐振式的。图1所示天线便是在波导宽壁开有偏置辐射裂缝的典型例子。这类天线还在波导宽壁开倾斜裂缝(图中看不见),以便把射频功率从低功率电平的波导馈送宽壁裂缝波导。这是用在雷达中的裂缝阵的一种常用结构形式。
INTRODUCTION Fissured waveguide array antennas are used in many microwave communications and radar systems that require narrow or shaped beams. Especially for on-board equipment, where light weight and small scans are important. This type of antenna is a cracked array of narrow or wide walls of waveguides that can either be resonant or non-resonant. The antenna shown in Figure 1 is a typical example of a biased radiative crack in the wide waveguide. This type of antenna is also open at the waveguide walls with oblique slits (not visible) to feed RF power from the low power level waveguide to the WFW. This is a common structural form of crack arrays used in radar.