RF Guide

RF Ground Plane Size Guide

How ground plane size affects monopole antennas, PCB antennas and RF range.

Overview

How ground plane size affects monopole antennas, PCB antennas and RF range.

Design checklist

Check wavelength, impedance, matching, ground plane, antenna placement, cable loss, connectors and final enclosure.

Practical notes

RF behavior changes after installation. Test with the final PCB, enclosure, cable and antenna position.

Common mistakes

Common mistakes include poor ground plane, long lossy coax, wrong connector type, metal near antenna and tuning outside the final product.

Frequently asked questions

Should I tune the antenna in the final enclosure?

Yes. Enclosure, battery, PCB ground and cable routing can change antenna behavior.

Does higher gain always improve range?

Not always. Higher gain changes the radiation pattern and can reduce coverage in some directions.