【正文】 S 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。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。tand, once king of Denmark c) In honor of its developer, “Big Blue” (IBM) d) From a Muppets characters by the same name 2. Where did ZigBee get its name? a) Nobody really knows b) From the zigzag path of a bee c) Named after the ic strip character, Ziggy d) From the German phrase “sie gabe,“ meaning, “it just works” 3. Who is credited with conceiving of spread spectrum radio munications? a) Dr. Andrew Viterbi b) Qualm c) Actress Hedy Lamarr d) Kinch, the radio operator of Hogan’s Heroes 4. What is meant by the fronttoback ratio of a Yagi antenna? a) The physical size of the front half of the antenna vs. the back half b) The number of driven elements vs. number of director elements c) Power radiated in the front main lobe vs. power in opposite direction d) The weight proportion of the front half of the antenna vs. the back half 5. In an FM modulator with a 10 kHz deviation and a 5 kHz maximum modulating frequency, what is the total occupied bandwidth? a) 10 kHz b) 15 kHz c) 20 kHz d) 30 kHz 6. Which WLAN standard provides the highest data rate? a) ( GHz RF)54Mbps b) ( GHz RF)11Mbps c) ( GHz RF)54Mbps d) ( GHz RF)100Mbps+ 7. Why might the mounting orientation of a surface mount capacitor affect frequency response? a) The plates 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。s constant 10. To which constant is *106 H/m assigned? a) Bohr radius b) speed of light in a vacuum c) permittivity of free space d) permeability of free space RF Quiz16 1. What does dBi, the most often used unit for antenna gain (or directivity), stand for? a) Decibels of isolation b) Isometric radiation in decibels c) Decibels of gain relative to an isotropic radiator d) Intrinsic gain in decibels 2. For which region of space does antenna gain normally apply? a) Near field b) Far field c) At the feed point d) Everywhere Elevation Pattern Azimuth Pattern which type of antenna does the pattern to the right describe? a) Parabolic b) Yagi c) 1/2wave dipole d) 1/4wave vertical whip 4. What is the free space impedance that an antenna sees? a) 50 Ω b) 75 Ω c) 16p Ω (≈50 Ω) d) 120p Ω (≈377 Ω) 5. What is the name given to the p