Explore topic-wise MCQs in Microwave Engineering.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

If the length of aperture in a pyramidal horn antenna is 10cm and δ for the design is 0.25. Then, the flaring angle of the pyramidal horn is:

A. 30⁰
B. 25.4⁰
C. 45⁰
D. 60⁰
Answer» C. 45⁰
Discussion
2.

The terminal impedance of a dipole antenna is 710 Ω. The terminal impedance of the slot antenna given the intrinsic impedance of air is 377 Ω is:

A. 100 Ω
B. 50 Ω
C. 25 Ω
D. None of the mentioned
Answer» C. 25 Ω
Discussion
3.

______ antennas have gain less than reflector antennas but have more lenient tolerance on surfaces.

A. Helical antennas
B. Lens antennas
C. Array antennas
D. Slot antennas
Answer» C. Array antennas
Discussion
4.

LENS_ANTENNAS_ARE_CLASSIFIED_INTO_TWO_TYPES._ONE_BEING_FAST_ANTENNA,_THE_OTHER_ONE_IS:?$

A. Slow antenna
B. Delay antenna
C. Dynamic antenna
D. None of the mentioned
Answer» C. Dynamic antenna
Discussion
5.

High directivity required in RADAR communication is satisfied using this type of antennas:$

A. Wide band antennas
B. Antenna arrays
C. Slot antennas
D. Patch antennas
Answer» C. Slot antennas
Discussion
6.

The_antennas_which_offer_high_operational_bandwidth_and_the_antenna_parameters_are_maintained_over_a_wide_range_of_antennas_are_called:$

A. Wide band antennas
B. Array antennas
C. Parabolic antennas
D. None of the mentioned
Answer» B. Array antennas
Discussion
7.

If the directivity of a square corner receiving antenna is 20 and operating at a wavelength of 0.25m, the effective aperture of a square corner antenna is:

A. 0.4 m<sup>2</sup>
B. 0.2 m<sup>2</sup>
C. 0.1 m<sup>2</sup>
D. None of the mentioned
Answer» B. 0.2 m<sup>2</sup>
Discussion
8.

If the length of aperture in a pyramidal horn antenna is 10cm and δ for the design is 0.25. Then, the flaring angle of the pyramidal horn is:$

A. 30‚Äö√Ö‚àû
B. 25.4‚Äö√Ö‚àû
C. 45‚Äö√Ö‚àû
D. 60‚Äö√Ö‚àû
Answer» C. 45‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ª
Discussion
9.

The_terminal_impedance_of_a_dipole_antenna_is_710_Ω._The_terminal_impedance_of_the_slot_antenna_given_the_intrinsic_impedance_of_air_is_377_Ω_is:$

A. 100 Ω
B. 50 Ω
C. 25 Ω
D. None of the mentioned
Answer» C. 25 ‚âà√≠¬¨¬©
Discussion
10.

______ antennas have gain less than reflector antennas but have more lenient tolerance on surfaces?

A. Helical antennas
B. Lens antennas
C. Array antennas
D. Slot antennas
Answer» C. Array antennas
Discussion
11.

The pattern of the reflector in a reflector antenna is called:

A. Primary pattern
B. Secondary pattern
C. Reflector pattern
D. None of the mentioned
Answer» C. Reflector pattern
Discussion
12.

Reflector antennas are widely used to modify radiation patterns of radiating elements.

A. True
B. False
Answer» B. False
Discussion
13.

Patch antennas are the antennas of small size and are made of:

A. Strip line
B. Microstrip lines
C. Coaxial cables
D. Rectangular waveguide
Answer» C. Coaxial cables
Discussion
14.

Antenna that does not belong to the horn antenna family among the following are:

A. Pyramidal horn
B. Conical horn
C. bi-conical horn
D. None of the mentioned
Answer» E.
Discussion
15.

Based on the size of the loops, loop antennas are classified as small and large loops. This is the only classification of loop antenna.

A. True
B. False
Answer» C.
Discussion
16.

The antenna in which location of the feed determines the direction of the lobe are:

A. Wire antenna
B. Loop antenna
C. Helical antenna
D. Horn antenna
Answer» B. Loop antenna
Discussion
17.

The members of the antenna family which are made of wires of certain value in terms of operating wavelength are called:

A. Loop antennas
B. Wire antennas
C. Dipole antenna
D. Slot antennas
Answer» D. Slot antennas
Discussion