【正文】 s Current Law b) Chebyshev39。5% b) 62 kΩ, 177。 RF Magazine c) RF Design Magazine d) The Institute of Electrical amp。 Celluloid c) Glass amp。C (212176。F) b) 250176。 Hard Rubber 7. Along which side of rectangular waveguide is an E bend made? a) Longer side b) Shorter side c) Either side 8. What is the lowest modulation index at which an FM carrier is suppressed? a) b) ? () c) Only AM carriers can be suppressed 9. How much current is required through the human body to cause an onset to muscular paralysis during electrocution? a) Voltage is the culprit during electrocution, not current b) 21 mA c) 189。 Electronics Engineers 8. What is the “rule of thumb” for estimating RF signal propagation distance vs. time in free space? a) 1 millimeter per millisecond b) 1 meter per microsecond c) 1 foot per nanosecond d) 1 inch per picosecond 9. What is the “rule of thumb” for estimating RF frequency vs. wavelength in free space? a) 300 MHz = 1 meter b) 100 MHz = 1 meter c) 300 MHz = 3 feet (1 yard) d) 100 MHz = 1 foot 10. What is the most unique feature of a Helmholtz coil? a) The high voltage makes for cool Jacob’s Ladders b) Magic field lines are extremely uniform within the coil c) It is selfpowered d) It uses a rare earth element core 1. Which hand rule applies for determining the direction of the magic field around a currentcarrying wire? Assume conventional current flow from positive to negative, and magic field leaving the north pole and entering the south pole. a) Righthand rule b) Lefthand rule c) Wholehand rule 2. What is the name given to the display pattern when independent signals are fed into the xaxis and yaxis ports of an oscilloscope? a) XY waveform b) Lissajous waveform c) Complex 3. How is the word Fresnel pronounced (as in Fresnel zone or Fresnel grating)? a) frēsn?l39。5% c) 62 kΩ, 177。s Current Law c) Kirchhoff39。s bicep b) Free radical c) Electron d) Light particle 7. Audion a) Music aficionado b) Sound generator c) Vacuum tube triode d) Sound level meter 8. Caloric a) A stomach settling medical remedy b) Unit of work c) Unit of electrical resistance d) Fluid responsible for heat flow 9. Leyden jar a) Glass vacuum chamber b) Energy storage device (capacitor) c) Calibrated nudge d) Test tube 10. Voltaic pile a) Battery b) Hemorrhoid c) Large heap d) Nuclear reactor RF Quiz19 1. Which circuit law states that the sum of all currents into and out of a node equals zero? a) Norton39。 EPlane bend 8. What is the value of the resistor shown on to the right? a) kΩ, 177。ndchen RF Quiz 10: A Sampling of RF Topics 1. What format would a nearfiled munications (13 MHz variety) antenna most likely take? a) Inductive coil b) Capacitive plate c) Yagi d) Parabolic dish 2. What does SOLT stand for? a) Short Overload Test b) Simple OperationaL Test c) Short, Open, Load, Through d) Strategic Offensive Limitation Talks 3. Which instrument would be best to use to locate a defective waveguide joint? a) Microscope b) Micrometer c) Spectrum Analyzer d) Time Domain Reflectometer 4. Which entity in the . determines whether an RF energyemitting device is allowed to be operated? a) The Federal Communications Commission b) The Amateur Radio Relay League c) The Honor System d) The Underwriter’s Laboratory 5. What does 2G, , 3G, etc., mean in reference to cellphones? a) The average cost of service, expressed in thousands of dollars ($ grand) per year b) The “generation” of the technology c) It is an arbitrary alphanumeric reference code d) The frequency band of operation, in GHz 6. Where would you be likely to find a free wireless Inter connection? a) Hotel Lobby b) Airport c) Your backyard d) All the above 7. Who hosts the MTTS International Microwave Symposium? a) Microwave Journal Magazine b) Microwaves amp。 Wool b) Rubber Balloon amp。re on the subject of Smith charts, what is the impedance of the point at the far left edge of the center horizontal line? a) Infinite ohms (open circuit) b) Zero ohms (short circuit) c) 50 ohm match 3. A singleconversion downconverter uses a highside local oscillator (LO) to translate the input radio frequency (RF) to an intermediate frequency (IF). Will spectral inversion occur at IF? a) Yes, always b) No, never c) Sometimes 4. What happens to the noise floor of a spectrum analyzer when the input filter resolution bandwidth is decreased by two decades? a) 20 dB increase b) 20 dB decrease c) 40 dB decrease 5. What is a primary advantage of a quadrature modulator? a) Low LO power required b) Four separate outputs c) Singlesideband output 6. What is meant by dBi as applied to antennas? a) Isolation in decibels b) Physical size relative to intrinsic antennas c) Gain relative to an isotropic radiator 7. What is the power dynamic range of an ideal 12bit analogtodigital converter (ADC)? a) dB b) 120 dB c) dB 8. An ideal 10 dB attenuator is added in front of a load that has a :1 VSWR. What is the resulting VSWR of the load + attenuator? a) :1 b) :1 c) :1 9. What is the thermal noise power in a 1 MHz bandwidth when the system temperature is 15 degrees Celsius (assume gain and noise figure are 0 dB)? a) dBm (in a 1 MHz bandwidth) b) dBm c) dBm/Hz 10. Two equal amplitude tones have a power of +10 dBm, and generate a pair of equal amplitude 3rdorder intermodulation products at 20 dBm. What is the 2tone, 3rdorder intercept point (IP3) of the system? a) +40 dBm b) +25 dBm c) +20 dBm RF Quiz 3 1. What is a primary advantage to using 90 degree (quadrature) hybrid couplers in amplifier designs? a) Wider b