Antenna Analyzer

Overview

An antenna analyser is a small vector impedance meter that sweeps a range of frequencies and reports the complex impedance at each point. Instead of a single SWR number, you get the whole picture: where the antenna resonates, how wide its usable bandwidth is, and whether the impedance is resistive or reactive at the frequency you care about.

That extra information changes how you work. A dipole that reads 2:1 at your operating frequency might be perfectly resonant a hundred kilohertz away, and the analyser shows you which way to trim. Because it generates its own low-power signal, you can measure an antenna without a transmitter at all.

Bands and modes

Band coverage

Modes

Safety note

Using it well

• Sweep the whole band and find the true resonance point before trimming anything.
• Measure with the antenna at its final height, not on the ground.
• Record the resonance frequency before and after each trim so you learn the ratio.
• Use it to check feedline loss by comparing measurements at both ends of the run.