A low noise amplifier with a relatively low (linear) gain at the antenna, will do more to improve the noise figure than anything else.
http://ava.upuaut.net/?p=836 http://www.rtl-sdr.com/rtl-sdr-blog-units-back-in-stock-polling-on-future-upgrades/#comment-80749 The above two links should help you understand why people use LNA's away from the receiver. On 01/02/2017 10:50, Marc Pàmies Massip wrote: > Dear all, > > I wanted to ask if it is worth using an external LNA (specifically an > LNA4ALL) to improve the reception performance of the HackRF-One. I know it is > a basic part of any radio communications systems, but I don't get why it > could be necessary if the HackRF already incorporates an internal LNA. Does > the use of an extra LNA has any drawback that I might consider? It would > improve the reception of weak signals? > > Wouldn't it make more sense to add a preselector filter instead, as those are > missing in this device? > > Thanks in advance, > > Marc. > > > _______________________________________________ > HackRF-dev mailing list > [email protected] > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
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