Low Noise Amplifiers - Low Noise Amplifiers EERF6395...

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Low Noise Amplifiers EERF6395 RF/Microwave Systems Engineering Dr. R. E. Lehmann
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Applications Receivers – Communications • Radio Cell phone WLANs, Bluetooth… Radar (military, commercial) • Narrowband Complements the transmitter as a T/R function Electronic warfare Wideband receivers Channelized receivers Radio astronomy Cryogenically cooled receivers Very narrow bandwidths
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Inside a Cell Phone Source: http://electronics.howstuffworks.com/inside-cell-phone.htm
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Transmit/Receive Module (T/R Module) Driver Amp Power Amp Tx Phase Shifter LNA Limiter Switch Antenna Circulator Rx
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X-band T/R Module Source: http://www.microwaves101.com/encyclopedia/transmitreceivemodules.cfm
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Radio Astronomy The Goldstone Radio Telescope: • Located at the Goldstone Deep Space Communications Complex in the Mojave Desert, near Barstow, California. • The antenna has a dish 34 meters (110 feet) in diameter, is nine stories high, and weighs 850,000 pounds. • Known as Deep Space Station 12 (DSS-12), the antenna was used by NASA's Deep Space Network to track robotic planetary missions such as the Mariner missions, Voyagers 1 and 2, Galileo, and other spacecraft exploring the Solar System. Source: http://deepspace.jpl.nasa.gov/dsn/gavrt/index.html
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Arecibo Observatory The Arecibo Radio Telescope: • Located in Arecibo, Puerto Rico • Its position near the equator allows viewing of all the planets in our solar system • Diameter = 305m (1000 ft) • It is the largest single reflector telescope in the world.
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  • Spring '00
  • Cantfinish
  • Bipolar junction transistor, Return Loss, Noise Figure, Cryogenically Cooled Receivers, output return loss

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