NMK31103 Quiz 2

The ratio of radiation intensity in a given direction from antenna to the radiation intensity over all directions is _____.

• directivity

• power flux density

• diversity gain

• beamforming

The axis of back lobe makes an angle of ______with respect to the beam of an antenna.

• 0°

• 90°

• 180°

• 270°

In TM mode, ______ field lines are entirely transverse to the direction of propagation of EM wave whereas the______field has a component in that direction.

• electric, magnetic

• magnetic, electric

• magnetic, magnetic

• electric, electric

Waveguide is used for microwave communication systems for below specifications EXCEPT

• Low loss interconnect

• High power

• High isolation between interconnects

• Low frequency of microwave

Calculate the antenna reflection coefficient, │ Γ │ of S₁₁ of -20 dB.

• 0.1

• 0.01

• 10

• 100

Folded dipole antenna is a type of ____ antenna.

• aperture

• wire

• lens

• reflector

Rectangular aperture includes ____ antenna.

• parabolic

• Yagi-Uda

• horn

• dipole

The fed line, which is connected to patch just like a conducting strip is the ____.

• coaxial feed

• microstrip line feed

• aperture coupling

• proximity coupling

The following is the disadvantage of microstrip line feeding, which is ____.

• spurious feed radiation decreases with increase in substrate thickness

• spurious feed radiation increases with increase in substrate thickness

• spurious feed radiation increases with decrease in substrate thickness

• All above.

One of the advantages of the microstrip antenna compared to conventional microwave antenna is ____.

• low gain

• small size

• high gain

• no surface wave excitation