Assertion: radome's diameter | /r/CapableOf | require by the size of the cavity
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Source sentences:
text: In an amplitude comparison configuration, in which the antenna axes diverge from the boresight, the diameter of the array is defined by the lowest frequency to be detected since this frequency determines the maximum spiral diameter required, by the size of the cavity, which must be sufficient to provide absorption of substantially all of the reverse-radiated emission from the spiral, and by the size of the balun box.