The measurements scenario with the RTL-SDR dongles, antennas and a PC.

Using an RTL-SDR and moRFeus as a Tracking Generator to Measure Filters And Antenna VSWR

An off-the-shelf RTL-SDR unit.

LNA

What are some ways you've improved performance of an RTL-SDR? - Quora

SDR-UAM-I: A low-cost spectrum analyzer.

rtl2832

Phase Coherent Beamforming SDR

Making it rain with Software Defined Radio - Spurious Emissions

RTL-SDR and SDR#

A Look Inside the RTL-SDR Kit (Software Defined Radio with Dipole Antenna Kit)

Using our new Dipole Antenna Kit

New RTL-SDR Dongles with Metal Case Available in our Store