Q. Which of the following antennas produce a vertical radiation pattern?

View solution

Q. What is the use of loading coil?

View solution

Q. Why is top hat added to antennas?

View solution

Q. In a parasitic array antenna, the conductors that are not connected to the transmission line is called as?

View solution

Q. In a parasitic array the elements are shorted if they are connected to a conducting beam.

View solution

Q. Parasitic element that is typically about 5 percent longer than the half-wave dipole-driven element is called _______

View solution

Q. Why is the boom of the yagi antenna connected to a metal mast and electrical ground?

View solution

Q. Which of the following is not one of the types of driven array antenna?

View solution

Q. What is the length of the shortest element in the yagi antenna?

View solution

Q. What happens if a satellite is launched vertically and released at its design altitude?

View solution

Q. The satellite is accelerating as it orbits the earth.

View solution

Q. Why does the orbit take the shape of an ellipse or circle?

View solution

Q. The direction of orbit in the same direction of earth rotation is called ______

View solution

Q. When is the speed of the satellite maximum in an elliptical orbit?

View solution

Q. Satellites closer to the earth travel at lower speeds than satellites that are far away from earth.

View solution

Q. The time period taken by the satellite to complete one orbit is called ________

View solution

Q. The period of time that elapses between the successive passes of the satellite over a given meridian of earth longitude is called as _____________

View solution

Q. What is the angle of inclination for a satellite following an equatorial orbit?

View solution

Q. The angle between the line from the earth station’s antenna to the satellite and the line between the earth station’s antenna and the earth’s horizon is called as ___________

View solution

Q. To use a satellite for communication relay or repeater purposes what type of orbit will be the best?

View solution