DAY 1_SFM TUDM 2023_161023

1. What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication?

• 1 m – 10 m

• 1 cm – 10 cm

• 10 cm – 1 m

• 0.1 cm – 1 cm

Which among the following is an application of high frequency?

• SONAR

• Subsurface communication

• Radio navigation

• Facsimile

Power density is basically termed as ________ power per unit area

• Reflected

• Refracted

• Radiated

• Diffracted

When an electromagnetic wave travels from transmitter to receiver, which factor/s affect/s the propagation level?

• Curvature of earth

• Roughness of earth

• Magnetic field of earth

• All of the above

What is the nature of radiation pattern of an isotropic antenna?

• Spherical

• Dough-nut

• Elliptical

• Hyperbolic

 In which kind of array configuration, the element locations must deviate or adjust to some non-planar surface like an aircraft or missile?

• Linear

• Planar

• Conformal

• All of the above

For large distances the earth can be considered as

• flat region

• curved region

• flat, curved region

• none

What is a radar cross-section (RCS)?

• An engineering isometric drawing showing a slice through the equipment rack(s)

• A target's reflection coefficient relative to a perfectly reflecting spherical surface of 1 

  m2 cross-section

• The plane through which a radar signal passes through a target.

What are common units of radar cross-section (RCS)?

• dBsm

• dBrcs

• dBm

9. Synthetic Aperture Radar (SAR) radar is mostly likely to be located on which platform?

• Police car

• Ship

• Airplane