【正文】 assigned? a) speed of light in a vacuum b) dielectric constant of a vacuum c) acceleration of gravity near Earth39。s 2. Which best describes a bistatic radar? a) Fixed transmitter and fixed receiver at different locations b) Uses static electricity for both transmitted and received signals c) Only detects fixed (nonmoving) targets 3. What is a radar crosssection (RCS)? a) An engineering isometric drawing showing a slice through the equipment rack(s)? b) A target’s reflection coefficient relative to a perfectly reflecting spherical surface of 1 m^2 crosssection c) The plane through which a radar signal passes through a target 4. What are mon units of radar crosssection (RCS)? a) dBsm b) dBrcs c) dBm 5. Who is known as ”The Father of Radar?” a) Robert WatsonWatt b) Walter Eugene O39。 RF Quiz 1 1. What is the impedance of free space? 377ou 2. What happens to the noise figure of a receiver when a 10 dB attenuator is added at the input? a) Noise figure increases by 10 dB b) Noise figure decreases by 10 dB c) Noise figure doesn39。Reilly c) Albert Einstein 6. Which flying (movement) condition will always result in a Doppler speed of 0 m/s? a) Perfectly constant speed into/out of the antenna boresight b) Perfect concentric circle around antenna at constant altitude c) Speeds at integer multiples of antenna rotation rate 7. What does “MTI” stand for? a) Multiple Target Indication b) Mean Time Interval c) Moving Target Indication 8. Synthetic Aperture Radar (SAR) radar is mostly likely to be located on which platform? a) Police car b) Ship c) Airplane 9. Which feature of a “stealth” aircraft is most responsible for its low observability? a) Radar absorbent paint b) Multifaceted surfaces c) Minimal use of metals in airframe 10. What kind of radar did the webmaster of RF Cafe work on while in the ? a) MPN14 b) RDR12 c) NEXRAD RF Quiz 8: Hallmark Decades in Electronics 1. In which decade was the transistor invented? a) 1940s b) 1950s c) 1960s 2. In which decade was the telegraph invented? a) 1810s b) 1840s c) 1870s 3. In which decade was the Inter first implemented? a) 1950s b) 1960s c) 1970s 4. In which decade was the first solid state integrated circuit demonstrated? a) 1950s b) 1960s c) 1970s 5. In which decade were the first successful diode and triode vacuum tubes invented? a) 1880s b) 1890s c) 1900s 6. In which decade was the telephone invented? a) 1850s b) 1860s c) 1870s 7. In which decade was the AEEE (now the IEEE) founded? a) 1880s b) 1910s c) 1940s 8. In which decade with the first transatlantic radio broadcast occur? a) 1880s b) 1890s c) 1900s 9. In which decade was the SPICE simulator introduced? a) 1960s b) 1970s c) 1980s 10. In which decade was the ARRL founded? a) 1910s b) 1920s c) 1930s RF Quiz 9: A Smasbord of RF Topics 1. Where did Bluetooth? get its name? a) Nobody really knows b) In honor of Harald Bl229。s surface d) magic constant 7. To which constant is *1012 F/m assigned? a) rate of change of temperature in silicon b) speed of light in a vacuum c) permittivity of free space d) permeability of free space 8. To which constant is *108 km/s assigned to? a) orbital velocity b) electron speed c) acceleration of gravity d) speed of light in a vacuum 9. To which constant is *1023 J/K assigned? a) universal gas constant b) carbon band energy c) uranium band energy d) Boltzmann39。s constant c) electric field d) gravitational constant 2. To which constant is assigned? a) base of natural logarithms b) base of unnatural logarithms c) ratio of major and semimajor axis of an ellipse d) dielectric constant of ceramic 3. To which constant is 9,192,631,770 assigned? a) astronomical unit b) oscillations of a cesium atom in exactly one second c) picoangstroms in a meter d) hours in a lightyear 4. To which constant is *1035 m assigned? a) Planck length b) thickness of a human hair c) wavelength of yellow light d) tolerance of the standard meter 5. To which constant is *1028 g assigned? a) neutron rest mass b) proton acceleration c) electron rest mass d) photon acceleration 6. To which constant is m/s178。 Schwarz ? Voltronics ? General Microwave ? Dielectric Laboratories ? RF Micro Devices ? GHz Technology _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ RF Quiz 6: Wireless Communications Fundamentals 1. Which of the following WLAN standards is on a different frequency band than the others? a) b) c) d) 2. What does the term ruggedness refer to in wireless power amplifiers? a) Ability to withstand thermal stress b) Ability to withstand mechanical stress c) Ability to withstand load mismatch d) All the above 3. Which FCC regulation governs the unlicensed ISM band? a) Part 15 b) Chapter 11 c) d) Subsection 11 4. In which semiconductor technology are the majority of cellphone PAs manufactured? a) Si/SiCMO