8-43E: Waveguides 2

Question 1

8-43E3

A right-angle bend in an X-band waveguide must have a radius
greater than:

A. Three inches.
B. Six inches.
C. One inch.
D. Two inches.

Answer 1

ANSWER D
Sharp bends in an X-band waveguide run will cause signal trasmission problems. A bend with the radius of 2 inches or greater will provide a smooth path with minimul “bumps” along the transmission line. Since most waveguide runs are short and confined to the antenna unit, the factory that has manufactured the equipment has already taken this into account.

Question 2

8-43E5

The following is true concerning waveguides:

A. Conduction is accomplished by the polarization of electromagnetic and electrostatic fields.
B. Ancillary deflection is employed.
C. The magnetic field is strongest at the center of the waveguide.
D. The magnetic field is strongest at the edges of the waveguide.

Answer 2

ANSWER D
The magnetic filed is strongest along the copper edges of the waveguide, and the electric field is strongest at the center of the waveguide. It’s important that the inside of the waveguide be a clean as possible. Since new ship installations don’t require long waveguide runs, this waveguide question really apply to older (very old!) installations.