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2 Signals
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Problem set 2: Signals and systems: part I
ocw.mit.edu2 Signals and Systems: Part I Recommended Problems P2.1 Let x(t) = cos(wx(t + rx) + Ox). (a) Determine the frequency in hertz and the period of x(t) for each of the follow
CHAPTER 3: ANTENNAS - MIT OpenCourseWare
ocw.mit.eduThe flux density Wm 2 incident on various targets when one-megawatt radar pulses are transmitted can be calculated using: P2 T 2 PWm G , 4R TIx S (3.1.4) Radar pulses directed toward the moon, Jupiter, and the star Antares at distances R 3u108, 1012, and 3u1016meters yield fluxes of 10 5, 10 12, and 10 21 watts/meter2, respectively.