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for the wavegulde described in problem 7 what would be the usable freq

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For the wavegulde described in problem 7, what would be the usable frequency range?

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Question 41242

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3. Two long, metallic cylinders are centered on the z-axis. The inner cylinder, of radius 1 m, is held at 1 V. The outer cylinder, of radius 2 m, is held at -1 V. Find the radius at which phi = 0.

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A N-turn resonant circular loop with a uniform current distribution and with a circumference of /4, is fed by a lossless balanced twin-lead transmission line with a characteristic impedance of 300 ohms. Neglecting proximity effects, determine the
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(b) input impedance of the antenna;
(c) reflection coefficient;
(d) VSWR inside the transmission line.

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A small circular loop with a uniform current distribution, and with its classical omnidirectional pattern, is used as a receiving antenna. Determine the maximum directivity (dimensionless and in dB) using:
(a) Exact method.
(b) An approximate method appropriate for this pattern. Specify the method used.
(c) Another approximate method appropriate for this pattern. Specify the method used.

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For the wavegulde described in problem 7, what would be the usable frequency range?