【正文】 ons c) Change in frequency due to thermal variation d) All the above 9. In a phaselocked loop (PLL) oscillator circuit, what does the phase detector do? a) Detects phase b) Compares relative phase between the reference input and oscillator output and introduces a shift as necessary to maintain phase coherence c) Injects random phase shifts at the input to stabilize the output frequency d) Phase detectors are not used in PLL circuits 10. Complete the following adage used in the days before puter simulators. If you want an oscillator, design an amplifier. If you want an amplifier, design a(n) ____. a) Amplifier b) Filter c) Oscillator d) Radio RF Quiz15 1. To which constant is *1023/ mol assigned? a) universal constant b) Avogadro39。 HPlane bend c) 90176。 b) frān?l39。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。 amp 10. At what frequency is electromagic energy maximally absorbed due to oxygen in the atmosphere? a) 22 GHz b) Only water in the atmosphere absorbs electromagic energy c) 63 GHz RF QUIZ 5 This quiz tests your recognition of logos from panies* that are leaders in the RF industry. In some cases, part of the standard logo was cropped because it had the pany name included. Printing out this page to fill in the blanks is probably the best way to go about this puzzle. Hover your cursor over a logo to see a hint as to what type of product it manufactures. _______________ _______________ ? American Technical Ceramics (ATC) ? Piconics ? Channel Microwave ? Marki Microwave ? Scientific Atlanta ? Anadigics ? National Instruments _______________ _______________ _______________ _______________ _______________ _______________ _______________ _______________ ? Remec ? Analog Devices ? Datel ? Andrew Corporation ? Hittite Microwave ? Delta ? Power Cube ? Agilent Technologies ? Synergy Microwave ? Power One ? Cypress Semiconductor ? Connecticut Microwave ? Miteq ? Vicor ? National Semiconductor ? Maury Microwave ? Cinch ? Stanford Microdevices ? Huber+Suhner ? Johanson Dielectrics ? Sage Labs ? Ansoft ? Atlantic Microwave ? Intusoft ? Dallas Semiconductor ? Merrimac Industries ? Applied Radio Labs ? Texas Instruments ? Trilithic ? Rohde amp。 Terrestrial Satellite 6. Which of these pairs of materials in the triboelectric series have the greatest charge transfer potential? a) Silk amp。C (482176。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 Sparamet