SFM 2023_MODULE 2_DAY 3: 3RD MAR 2023

What is antenna?

• is radiate light emissions from transmitter to receiver and vice-versa

• is used to received and transmit electrical signal

• is an electrical device that converts electric power into electromagnetic waves and vice-versa

• is an electronic device that receive and transmit electronic signal

From the list below, which one is possible satellite frequency of operation?

• VHF

• UHF

• SHF

• MF

Which one is not antenna mode of applications

• Point to point communications

• Radar communications

• Satellite communications

• Horn communications

What is definition of isotropic antenna?

• is a theoretical antenna which radiates power uniformly in all directions

• is a horn antenna which radiates power in one direction

• is a non exist antenna that radiates energy uniformly in all directions

• is a real antenna which radiates power uniformly in all directions

Whis answer in the group is NOT a correct antenna polarization?

• Left Hand Circular Polarization, Right Hand Circular Polarization, Dual Polarization, Vertical Polarization

• Left Hand Circular Polarization, Right Hand Circular Polarization, Vertical Polarization, Horizontal Polarization

• Vertical Polarization, Horizontal Polarization, Dual Polarization

• Vertical Polarization, Horizontal Polarization, Triple Polarization

Which one is NOT propagation of light behavior?

• Reflection

• Refraction

• Refreshion

• Diffraction

Which one is FRISS FORMULA?

• L_PF (dB) = 32.45 + 20 log₁₀ f_c (MHz) + 20 log₁₀ d (km)

• L_PF (dB) = 32.45 + 20 log₁₀ f_c (GHz) + 20 log₁₀ d (km)

• L_PF (dB) = 32.45 + 20 log₁₀ f_c (MHz) + 20 log₁₀ d (m)

• L_PF (dB) = 32.45 + 20 log₁₀ f_c (Hz) + 20 log₁₀ d (km)

Which one is NOT types of waves?

• Ground waves

• Space waves

• Underwater waves

• Sky waves

Which statement is NOT describing the LINK BUDGET?

• Used to plan useful coverage of cells

• Gains are added and losses are subtracted

• Used to find max allowable path loss in each link

• Gains are subtracted and losses are added

If a signal is transmitted with 10dBm, antenna used at transmitter and receiver has gain of 10dB, Fress Space Loss of 40dB, what is the SNR at the receiver when Noise Level is 10dBm?

• -10 dBm

• -20 dBm

• 50 dBm

• 80 dBm