noise figure

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Antennas : 70cm

  • 26 elelements 432MHz LFA Yagi - 26 elements 70cms Yagi for EME ultra low noise excellent G/T figure. Easy self build
    [ Hits: 1537 | Votes: 1 | Rating: 10.00 ]
Antennas : Horn
  • A Horn Antenna for 2.4 GHz. - This Antenna is not really practical for AO-40 reception, but horn antennas have a number of qualities useful in microwave antenna testing and noise figure measurements.
    [ Hits: 10355 | Votes: 27 | Rating: 3.48 ]
  • Noise Figure Measurement using Standard Antennas - Measuring noise fiugre on the W2IMU horn and the dual-dipole-feed
    [ Hits: 183 | Votes: 1 | Rating: 3.00 ]
Antennas : Theory : Antenna Gain
  • G/T Simulations - by VE7BQH - Here you will find information on how antennas behave when stacked G/T is an important figure-of-merit for the antenna's overall receive performance, because it balances forward gain (G) against received thermal noise (T).
    [ Hits: 682 | Votes: 8 | Rating: 7.87 ]
Software : Circuit Design
  • NFM - noise figure measurement - NFM (for Noise Figure Meter) is a software application to assist Noise Figure measurement. NFM implements the method of Agilent application notes AN 57-1 and AN 57-2 for noise figure measurement, but with the addition of an adjustable attenuator after the noise source and between the DUT and instrument.
    [ Hits: 274 | Votes: 4 | Rating: 7.75 ]
Software : Spectrum analyzers
  • Noise Meter - Noise Meter software for the noise meter tool by G8KBB that measure noise using a PC sound card and calculate noise figures by means of a calibrated noise source.
    [ Hits: 270 | Votes: 0 | Rating: 0.00 ]
Software : iPhone
  • Friis-It NF for iPhone - Friis-It NF is the first iPhone OS based application that allows you to calculate noise figure, system sensitivity, and cascaded gain for an RF Receiver system
    [ Hits: 391 | Votes: 1 | Rating: 10.00 ]
Technical Reference : Preamplifiers
  • 144 MHz preamplifier with BF981 - Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.
    [ Hits: 16318 | Votes: 26 | Rating: 5.92 ]
  • 23 cm GaAs FET preamplifier - On 23cm the best way to obtain a good RX-sensitivity is to use a GaAs-FET in the front-end, since these devices show very low noise figures.
    [ Hits: 3633 | Votes: 5 | Rating: 5.20 ]
Technical Reference : Spectrum Analyzers
  • Noise Figure Meter with a Spectrum Analyser - A relatively simple automatic Noise Figure (NF) meter was developed which is using a spectrum analyser as the receiver and logarithmic power detector.
    [ Hits: 763 | Votes: 1 | Rating: 2.00 ]
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