1. The normalized radiation intensity of an antenna is represented by U (0) = cos (0) cos² (30), (0 ≤ ≤ 90°, 0° ≤ ≤ 360°) Find the exact and approximate directivity. 2. The radiation intensity is represented by Uo sin(7 sin 8), 0≤0 ≤7/2 and 0 ≤ ≤ 2π 0 elsewhere Find 0HP and draw the radiation pattern. U =

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A: This is a illumination question

Q: The answer according to the book is 7.576 GHz

A: Approach to solving the question:Propagating signal frequencyDetailed explanation:

Q: Find the electric field at the location of q, in the figure below, given that qb= q == +4.25 nC, q =…

A: Given data, Charges at the corner, qb=qc=qd=+4.25 nC Charge at the center, q=-1 nC

Q: . If two coherent light beams can create interference patterns, which of following condition is not…

A:

Q: John, a wireless engineer is interested in using an antenna that is commonly used in communications…

A: The solution is provided in the following section.

Q: A radio broadcast antenna is located at the top of a steep tall mountain. The antenna is…

A: It is given that: P=6kWf=104.3 MHz

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A: The directivity and effective aperture are related by the following equation.

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A:

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).