【正文】 es in the body could be either parallel to or perpendicular to the PCB, affecting coupling b) Adhesion is usually better in one orientation c) Conductive epoxy adhesion is usually better in one orientation d) Orientation makes no difference 8. If you were handed an unprocessed wafer of gallium arsenide (GaAs), silicon (Si), silicongermanium (SiGe), and gallium nitride (GaN), how would you know which is GaN? a) GaN is transparent and the others are not b) The GaN wafer will be noticeably lighter in weight c) The GaN wafer will be much thinner than the others d) It would not be possible to tell the difference 9. The Smith Chart plot of a 50 ohm cable (in a 50 ohm system) spirals inward as the impedance is plotted through multiple cycles. What is that indicative of? a) A lossy cable b) A capacitive cable c) An inductive cable d) The cable is coiled on a spool 10. What are the three primary JEDEC models used for ESD testing? a) High (HHM), Medium (MHM), and Low (LHM) Humidity Model b) High (HVM), Medium (MVM), and Low (LVM) Voltage Model c) Human Body (HBM), Machine (MM), and Charged Device (CDM) Model d) Heidi Klum, Claudia Schiffer, and Gisele B252。 Terrestrial Satellite 6. Which of these pairs of materials in the triboelectric series have the greatest charge transfer potential? a) Silk amp。t change 3. An RF system has a linear throughput gain of +10 dB and an output 3rdorder intercept point (OIP3) of +30 dBm. What is the input 3rdorder intercept point (IIP3)? a) +20 dBm b) +40 dBm c) +30 dBm 4. Which filter type has the greatest selectivity for a given order (., N=5)? a) Bessel b) Chebychev (ripple= dB) c) Butterworth 5. Which mixer spurious product is a 5thorder product? a) 1*LO + 5*RF b) 6*LO 1*RF c) 3*LO 2*IF 6. A GHz oscillator is phaselocked to a 10 MHz reference oscillator that has a singlesided phase noise of 100 dBc at 1 kHz offset. What is the singlesided phase noise of the GHz oscillator at 1 kHz offset? a) dBc b) 100 dBc c) dBc 7. What is the power of a 2 Vpkpk sine wave across a 50 ohm load? a) dBm b) + dBm c) + dBm 8. Which 2port Sparameter is monly referred to as reverse isolation in an amplifier? a) S21 b) S22 c) S12 9. What are the minimum and maximum bined VSWR limits at an interface characterized by a :1 VSWR and a :1 VSWR? a) :1 (min), :1 (max) b) :1 (min), :1 (max) c) :1 (min), :1 (max) 10. An ideal directional coupler has a directivity of 25 dB and an isolation of 40 dB. What is its coupling value? I=D+C a) 65 dB b) 40 dB c) 15 dB RF Quiz 2 1. On a Smith chart, what does a point in the bottom half of the chart represent? a) An inductive impedance b) A capacitive impedance c) Power saturation 2. While we39。F) c) 186176。 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/SiCMOS b) GaN c) GaAs/InGaP d) SiGe 5. What is a major advantage of Low Temperature Cofired Ceramic (LTCC) substrates? a) Densely integrated passive ponents b) Better thermal dissipation c) Lower bill of materials d) All the above 6. Which phone standard supports the highest data rate? a) iDEN b) GPRS c) EDGE d) GSM 7. Which ponent is typically not part of a frontend module (FEM)? a) Power amplifier b) Filter c) Switch d) Controller 8. Which two systems are most likely to experience concurrent operation problems? a) WLAN + GSM b) Bluetooth + WLAN c) GSM + WCDMA d) Bluetooth + AMPS 9. An isolator is typically required at the output of the PA for which transmitter system a) EDGE b) Bluetooth c) GSM d) CDMA/WCDMA 10. What is the monly claimed nominal operational range for Bluetooth? a) 10 m b) ft c) ^15 ltyr d) All the above RF Quiz 7: Radar Fundamentals 1. What is a “radar mile?” a) 1 nautical mile b) 1 statute mile c) 181。 c) fr?sn?l39。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