Combining this with the shpaed noise spectrum, we obtain the noise power density at the earth’s surface as a function of frequency away from f shown in Figure 10-2. 10.1.2 KLYSTRON Again drawing upon the information in Section 4, Figure 4-45, we see that the noise power of a parallel driven klystron is 90. 8 dB per MHz below the carrier. Following the format laid down for the amplitron the 90. 8 dB translates to -150. 8 dB/Hz. The klystron noise shaping is given in Figure 4-52. Each 18m x 18m subarray is driven by a single source, so that the area for coherent noise will be The distance attenuation is the same as for the amplitron case (-162 dB).
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