Replacing rtl-sdr coaxial connector with sma to improve sensitivity [en]

Some rtl-sdr dongles are shipped with a coaxial connector, this connector is commonly used in home appliances and is typically used for 50 or 75 ohms characteriscal impediances. The coaxial connector works fairly well considering its construction and production costs however most coaxial connectors suffer high signal loss at high frequencies. The exact characteristic plot for a given coaxial connector differs greatly by brand, type and even per unit. By replacing the rtl-sdr coaxial connector with a sma connector we can expect improvements for received signal strength at higher frequencies.

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rtl-sdr with sma connector modification