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Metallic Cable Transmission Media - Chapter 12: Open Wire Quiz

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Metallic Cable Transmission Media - Chapter 12: Open Wire Quiz

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Questions and Answers

What does an SWR reading of 1:1 indicate?

The best impedance match has been attained (correct)

The signal is not properly reflected

Low transmission-line efficiency and high reflected energy

The transmitter is damaged

What is impedance matching used for?

Increasing signal loss

Decreasing transmitter efficiency

Increasing reflected energy

Maximizing power transfer (correct)

What is a quarter-wave impedance transformer used for?

Attaining the highest possible SWR reading

Matching impedances (correct)

Increasing the signal loss

Decreasing the input impedance

What is the main function of a terminal impedance in a quarter-wave impedance transformer?

To present, at its input, the dual of the impedance with which it is terminated (B) Signup and view all the answers

What happens if there is a high SWR value?

Low transmission-line efficiency and high reflected energy (B) Signup and view all the answers

What is the characteristic impedance of RG-8A/U?

50 Ω (A) Signup and view all the answers

What type of cable transmission media consists of two identical wires running parallel to each other, insulated primarily by an air gap between them?

Open wire (D) Signup and view all the answers

Which type of cable transmission media uses a two-conductor flat cable to carry radio frequency (RF) signals as a balanced transmission line?

Twin lead (C) Signup and view all the answers

What is a type of wiring in which two conductors of a single circuit are twisted together for the purposes of improving electromagnetic compatibility?

Twisted pair (D) Signup and view all the answers

Which type of cable transmission media surrounds the wire with a metallic braid or sheathing to reduce interference?

Shielded twisted pair (A) Signup and view all the answers

What type of cable consists of an inner conductor surrounded by a concentric conducting shield, with the two separated by a dielectric?

Coaxial cable (C) Signup and view all the answers

What is the characteristic impedance of a coaxial line with a polyethylene dielectric (ϵr = 2.3), if the diameter of the inner conductor is 3 mm and inside diameter of the outer conductor is 10 mm?

$82 Ω$ (A) Signup and view all the answers