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Electronics and Electrical Engineering Quizzes

Read the latest electronics engineering product design quizzes.

TAGS: Antenna

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A team of Columbia Engineering researchers, led by Applied Physics Assistant Professor Nanfang Yu, has invented a method to control light propagating in confined pathways, or waveguides, with high efficiency...
What type of log-periodic antenna is shown above? a.) Log-Periodic Toothed Trapezoidal Antenna b.) Log-Periodic Toothed Planar Antenna c.) Log-Periodic Dipole Antenna d.) Log-Periodic Zig-zag / Triangular Antenna ...
A log-periodic antenna, also known as a log-periodic array or aerial,  is a directional and narrow beam antenna that operates over a wide bandwidth. Its advantage is that it exhibits essentially...
Recall that a transmission line must consist of two separate conductors. Typically, the volume between these conductors is filled with a very low-loss dielectric. For example, a coaxial line has...
A block diagram of a microwave system, operating with a bandwidth of 6.3 MHz, on a mountainous and dry terrain is shown in the figure above. From the figure, determine...
If the height of the base station is 45m with an elevation of 605m, and the remote site is 20m tall with an elevation of 150m: I. Calculate the required...
Antennas have played a vital role in the field of communications. Wireless transmission and reception of signals have greatly impacted our everyday lives. Briefly describe the following antennas: Yagi-Uda...
A parabolic antenna has a diameter of 3 meters, an efficiency of 60%, and operates at a frequency of 4 GHz. Calculate the following: I. Beamwidth II. Gain
A pyramidal horn has an aperture (opening) of 58 mm in the E plane and 78 mm in the H plane. It operates at 10 GHz. Calculate:a. its gain in...
A dipole antenna using antenna traps is desired which is to be used to transmit a 140 MHz signal and a 90 MHz signal. Design the antenna assuming a velocity factor of 0.90.