1. Have a tendency to radiate
2. Are very difficult to design
3. Can not be placed at a convenient point
4. None of these
Have a tendency to radiate
1. Transmission efficiency
2. Front to back ratio
3. Loss coefficient
4. None of the above
Front to back ratio
1. Quarter wave line
2. Short circuited stub
3. Open circuited stub
4. Half wavelength line
Open circuited stub
1. Sacrificing gain
2. Increasing size of conductor
3. Using materials of high conductivity
4. All of the above
Sacrificing gain
1. Low-pass
2. High-pass
3. Band-pass
4. All-pass
All-pass
1. Sils of poor conductivity
2. Rocky earth
3. High building tops
4. All of the above
All of the above
1. Infinity
2. Z0
3. Zero
4. None of these
Zero
1. RC elements only
2. RL elements only
3. LC elements only
4. RLC elements
LC elements only
1. Voltage is applied between the upper part of the vertical radiator and tower is installed from ground
2. Voltage is applied between the lower part of the vertical radiator and tower is insulated from the ground
3. Voltage is applied only to the top T conductor and tower is grounded
4. Voltage is applied only to the top T conductor and tower is insulated from the ground
Voltage is applied between the lower part of the vertical radiator and tower is insulated from the ground
1. Near field region
2. Antenna aperature
3. Effective antenna diameter
4. Effective radiating area
Antenna aperature