In one of his recent videos, Matt from the Tech Minds YouTube channel reviews the SV4401A Vector Network Analyzer (VNA).  A VNA is a powerful tool that can be used for analyzing and tuning antennas, as well as other RF components such as filters and cables.

Typically we recommend the NanoVNA V2 and Nano V2 Plus 4 as low-cost VNA's that most hobbyist users will be happy with. However, the SV4401A comes with a much larger 7-inch touch screen, a nicer UI, built-in signal generator, and large frequency range spanning from 50 kHz - 4400 MHz. The price is similar to that of the Nano V2 Plus4, coming in at US$322, versus $299 for the NanoVNA V2 Plus4.