For a wavelength of 10 m, or a frequency of 30 MHz, the effective area of a single dipole is 11.9 m2. The Long Wavelength Array Station (LWA1) has 256 such dipoles, so the effective collecting area is 3056 m2. This is the equivalent of a geometric area of 64 m filled aperture.
(a) For the "Long Wavelength Array station 1 (LWA1)", what is the effective area if it does operate at 25 m
(b) What will be the effective collective area if the LWA1 has 256 dipoles?
(c) What will be the diameter of the filled aperture?
(d) If the power pattern is as given by , and the brightness distribution given by in the sky, derive the antenna temperature TA as given by

Question

For a wavelength of 10 m, or a frequency of 30 MHz, the effective area of a single dipole is 11.9 m2. The Long Wavelength Array Station (LWA1) has 256 such dipoles, so the effective collecting area is 3056 m2. This is the equivalent of a geometric area of 64 m filled aperture.
(a) For the "Long Wavelength Array station 1 (LWA1)", what is the effective area if it does operate at 25 m
(b) What will be the effective collective area if the LWA1 has 256 dipoles?
(c) What will be the diameter of the filled aperture?
(d) If the power pattern is as given by   , and the brightness distribution   given by  in the sky, derive the antenna temperature TA as given by

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Physics: Principles with Applications

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