What is an isotropic radiator?

1. A A calibrated, unidirectional antenna used to make precise antenna gain measurements
2. B An omnidirectional, horizontally polarized, precisely calibrated antenna used to make field measurements of antenna gain
3. C A hypothetical, lossless antenna having equal radiation intensity in all directions used as a reference for antenna gain
4. D A spacecraft antenna used to direct signals toward Earth

What is the effective radiated power (ERP) of a repeater station with 150 watts transmitter power output, 2 dB feed line loss, 2.2 dB duplexer loss, and 7 dBd antenna gain?

1. A 469 watts
2. B 78.7 watts
3. C 420 watts
4. D 286 watts

What term describing total radiated power takes into account all gains and losses?

1. A Power factor
2. B Half-power bandwidth
3. C Effective radiated power
4. D Apparent power

Which of the following factors affect the feed point impedance of an antenna?

1. A Transmission line length
2. B Antenna height
3. C The settings of an antenna tuner at the transmitter
4. D The input power level

What does the term "ground gain" mean?

1. A The change in signal strength caused by grounding the antenna
2. B The gain of the antenna with respect to a dipole at ground level
3. C To force net gain to 0 dB by grounding part of the antenna
4. D An increase in signal strength from ground reflections in the environment of the antenna

What is the effective radiated power (ERP) of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?

1. A 317 watts
2. B 2,000 watts
3. C 126 watts
4. D 300 watts

What is the effective isotropic radiated power (EIRP) of a repeater station with 200 watts transmitter power output, 2 dB feed line loss, 2.8 dB duplexer loss, 1.2 dB circulator loss, and 7 dBi antenna gain?

1. A 159 watts
2. B 252 watts
3. C 632 watts
4. D 63.2 watts

Which frequency band has the smallest first Fresnel zone?

1. A 5.8 GHz
2. B 3.4 GHz
3. C 2.4 GHz
4. D 900 MHz

What is antenna efficiency?

1. A Radiation resistance divided by transmission resistance
2. B Radiation resistance divided by total resistance
3. C Total resistance divided by radiation resistance
4. D Effective radiated power divided by transmitter output

Which of the following improves the efficiency of a ground-mounted quarter-wave vertical antenna?

1. A Installing a ground radial system
2. B Isolating the coax shield from ground
3. C Shortening the radiating element
4. D All these choices are correct

Which of the following determines ground losses for a ground-mounted vertical antenna operating on HF?

1. A The standing wave ratio
2. B Distance from the transmitter
3. C Soil conductivity
4. D Take-off angle

How much gain does an antenna have compared to a half-wavelength dipole if it has 6 dB gain over an isotropic radiator?

1. A 3.85 dB
2. B 6.0 dB
3. C 8.15 dB
4. D 2.79 dB