MICROWAVE COMMS QUIZ

Frequency range for satellite communication is

• 1 k Hz to 100 kHz

• 100 kHz to 10 MHz

• 10 MHz to 100 MHz

• 1 GHz to 30 GHz

• a capacitance

• an inductance

• L and C in series

• L and C in parallel

Microwaves are used for

• all of the choices

• telephony

• radio broadcast

• TV systems

The main advantage of using microwaves for communications is,

• small bandwidth

• high power

• lower power

• large bandwidth

• a capacitance

• an inductance

• L and C in series

• L and C in parallel

The beam of a radar should be,

• either narrow or wide

• neither too narrow nor very wide

• very wide

• very narrow

Microwaves

• get reflected by ionosphere

• are absorbed by ionosphere

• are neither reflected nor absorbed by the ionosphere

• are both reflected and absorbed by the ionosphere

The number of feet or meters and obstacle is raised higher in elevation owing to the curvature

• k-factor

• earth buldge

• Fresnel zone

• relative curvature

Determine the EIRP in dBm for a microwave system with the following parameters, transmitted power = 5dBm, transmitting and receiving antenna gain = 15 dB each

• 25

• 30

• 20

• 35

Calculate the earth bulge in meters at the middle of a 36km microwave link. Assume typical value for k-factor

• 25.4

• 18

• 19

• 20