Welcome to your Transmission Lines/Antennas MCQ practice assessment.

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What is the gain of an antenna over a half-wavelength dipole when it has 6 dB gain over an isotropic radiator

What is a disadvantage when using round rather than rectangular waveguide

An open circuit line greater than wavelenght/4 but less than wavelenght/2 in length will exhibit _____ reactance.

Calculate the time delay in nanosecond introduced by a 100 ft coaxial cable with a dielectric constant of 2.3.

Power loss due to increased effective resistance of a conductor at microwave frequencies due to skin effect

For earth’s station transmitter with an output power of 40 dBw, a back-off loss of 13 dB, a total branching and feeder loss of 13 dB, and a transmit antenna gain of 40 dB, determine the EIRP.

Gain of an isotropic antenna.

When a transmission line uses ground return, it is called a (n) _____ line.

What is the front-to-back ratio of an antenna which radiates 500 watts in a northernly direction and 50 watts in a southernly direction?

The shortest distance measured along the earth’s surface that a skywave is returned to eart

If a transmission line is terminated with a resistance equal to its characteristic impedance

The power fed to a two-bay turnstile antenna is 100 watts. If the antenna has a 2dB power gain, what is the effective radiated power

Whereas resonant antenna is bidirectional, non-resonant antenna is ____.

What is the dB gain of an antenna that delivers a 100-μV signal over that of an antenna delivers 75-μV?

Actual height of antenna should be at least

What is the orientation of the electric field of an antenna to the earth’s surface and antenna structure?

The ratio of incident and reflected voltage waves representing transmission and reflection coefficients used to characterize a linear microwave device.

The _____ is a measure of the mismatch between a load and the transmission line.

What is a short (< l/4) length of transmission line, shorted at one end and attached at the appropriate distance from the load for the purpose of matching a complex load to the transmission line?

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